Air conditioner, wire controller and power supply circuit thereof

Abstract

The utility model discloses an air conditioner, a wire controller and a power supply circuit of the wire controller. The power supply circuit of the wire controller comprises a first connecting end, a second connecting end, a first power supply end, a second power supply end, a standby power supply, a first access control module, a second access control module, a voltage detection module and a switching module. The voltage detection module is used for acquiring a working voltage between the first power supply end and the second power supply end when the main control board is connected with the first power supply end through the first access control module; and the switching module is used for controlling the main control board to be disconnected from the first power supply end through the first access control module and controlling the standby power supply to be connected with the first power supply end through the second access control module when the working voltage is smaller than the preset voltage. According to the application, the limitation of the line length on the communication distance in the long-distance communication process of the main control board and the line controller can be reduced, and the requirement on the first connecting line, namely a power line, is reduced, so that the cost is saved.

Description

Technical Field

[0001] This application relates to the field of electronic technology, specifically to an air conditioner, a wired controller, and its power supply circuit. Background Technology

[0002] In air conditioner applications, the communication method between the wired controller and the indoor unit is usually RS485. RS485 communication typically uses four wires: communication line A, communication line B, positive DC power supply, and negative DC power supply. Generally, the DC power required by the wired controller is provided by the indoor unit controller, usually 12V DC. However, as wired controllers become more feature-rich, incorporating power-intensive peripherals such as Wi-Fi and Bluetooth, the power supply line becomes more strained. When the indoor unit and the wired controller are installed far apart, significant power loss occurs on the line. To reduce this loss, requirements are usually placed on the quality and diameter of the power supply line, thus increasing the cost of the wiring. Utility Model Content

[0003] This application provides an air conditioner, a wired controller, and its power supply circuit, which can effectively alleviate the problem of limited communication distance between the indoor unit of the air conditioner and the wired controller due to the increased power consumption of the wired controller.

[0004] This application provides a power supply circuit for a wired controller, the power supply circuit of which includes:

[0005] The system includes a first connection terminal, a second connection terminal, a first power supply terminal, a second power supply terminal, and a backup power supply. The first connection terminal is used to connect to the main control board of the air conditioner via a first connection cable, and the second connection terminal is used to connect to the main control board via a second connection cable. The second connection terminal is connected to the second power supply terminal.

[0006] A first access control module and a second access control module are connected, with the first access control module connected between the first connection terminal and the first power supply terminal; the second access control module is connected between the backup power supply and the first power supply terminal.

[0007] A voltage detection module is connected to a first power supply terminal and a second power supply terminal respectively. The voltage detection module is used to obtain the working voltage between the first power supply terminal and the second power supply terminal when the main control board is connected to the first power supply terminal through the first access control module.

[0008] The switching module is connected to the voltage detection module, the first access control module, and the second access control module respectively. When the working voltage is lower than the preset voltage, the switching module controls the main control board to disconnect from the first power supply terminal through the first access control module, and controls the backup power supply to connect to the first power supply terminal through the second access control module.

[0009] In some embodiments of the power supply circuit of the wired controller, the switching module includes a controller and a power supply switching unit. The controller includes a control port and a detection port. The control port is connected to the power supply switching unit, and the detection port is connected to the voltage detection module.

[0010] The controller is used to obtain the operating voltage through the detection port. When the operating voltage is less than the preset voltage, the controller outputs the corresponding control signal to the power supply switching unit through the control port.

[0011] The power supply switching unit is used to control the main control board to disconnect from the first power supply terminal through the first access control module according to the corresponding control signal, and to control the backup power supply to connect to the first power supply terminal through the second access control module.

[0012] In some embodiments of the power supply circuit of the wired controller, the power supply switching unit includes a first resistor, a second resistor, and a first switching transistor. One end of the first resistor is connected to the control port, the other end of the first resistor is connected to one end of the second resistor and the first end of the first switching transistor, the other end of the second resistor is connected to the second connection terminal, the second end of the first switching transistor is connected to the second connection terminal, and the third end of the first switching transistor is connected to the first access control module and the second access control module respectively.

[0013] In some embodiments of the power supply circuit of the wired controller, the first access control module includes a third resistor and a second switch. One end of the third resistor and the first end of the second switch are both connected to the third end of the first switch. The other end of the third resistor and the second end of the second switch are both connected to a first connection terminal. The third end of the second switch is connected to a first power supply terminal.

[0014] In some embodiments of the power supply circuit of the wired controller, the second access control module includes a fourth resistor, a fifth resistor, a third switch, and a fourth switch; one end of the fourth resistor and one end of the fifth resistor are both connected to the first end of the third switch, the other end of the fourth resistor and the second end of the third switch are both connected to the positive terminal of the backup power supply, the third end of the third switch is connected to the first end of the fourth switch, the second end of the fourth switch is connected to the positive terminal of the backup power supply, and the third end of the fourth switch is connected to the first power supply terminal.

[0015] In some embodiments of the power supply circuit of the wired controller, the second access control module further includes a sixth resistor, one end of which is connected to the first end of the fourth switching transistor, and the other end of which is connected to the third end of the fourth switching transistor.

[0016] In some embodiments of the power supply circuit of the wired controller, the voltage detection module includes a seventh resistor and an eighth resistor. One end of the seventh resistor is connected to the first power supply terminal, and the other end of the seventh resistor and one end of the eighth resistor are both connected to the detection port of the controller. The other end of the eighth resistor is connected to the second power supply terminal.

[0017] In some embodiments of the power supply circuit of the wired controller, the first switching transistor includes a transistor, the first terminal of the first switching transistor is the base of the transistor, the second terminal of the first switching transistor is the emitter of the transistor, and the third terminal of the first switching transistor is the collector of the transistor.

[0018] This application also provides a wired controller, which includes the power supply circuit of the wired controller described above.

[0019] This application also provides an air conditioner, which includes the above-mentioned wired controller.

[0020] This application provides an air conditioner, a wired controller, and its power supply circuit. The switching module in the power supply circuit of the wired controller is used to control the main control board to disconnect from the first power supply terminal if the working voltage between the first power supply terminal and the second power supply terminal is less than a preset voltage when the main control board is powered. The first access control module controls the backup power supply to connect to the first power supply terminal, and the second access control module controls the backup power supply to connect to the first power supply terminal. This switches the power supply from the main control board to the backup power supply, thereby reducing the limitation of the communication distance on the line length during long-distance communication between the main control board and the wired controller, and reducing the requirements of the first connection line, i.e., the power line, in order to save costs. Attached Figure Description

[0021] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0022] Figure 1 A structural block diagram of the power supply circuit of the wired controller provided in the embodiments of this application.

[0023] Figure 2 The circuit diagram of the power supply circuit of the wired controller provided in the embodiment of this application. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0026] Please see Figure 1 This embodiment provides a wired controller, which includes a power supply circuit, comprising a first connection terminal A, a second connection terminal B, a first power supply terminal C, a second power supply terminal D, a backup power supply 11, a first access control module 12, a second access control module 13, a voltage detection module 14, and a switching module 15.

[0027] The first connection terminal A is used to connect to the main control board 20 of the air conditioner via the first connection line 31, and the second connection terminal B is used to connect to the main control board 20 via the second connection line 32; the second connection terminal B is connected to the second power supply terminal D. The main control board 20 corresponds to the indoor unit main control board 20 of the air conditioner. The main control board 20 of the air conditioner provides power to the wired controller via the first connection line 31 and the second connection line 32 to facilitate the establishment of a communication connection with the wired controller. The first access control module 12 is connected between the first connection terminal A and the first power supply terminal C; the second access control module 13 is connected between the backup power supply 11 and the first power supply terminal C, and the backup power supply 11 is also connected to the second connection line 32; the voltage detection module 14 is connected to the first power supply terminal C and the second power supply terminal D respectively; the switching module 15 is connected to the voltage detection module 14, the first access control module 12 and the second access control module 13 respectively, and the relevant load in the wire controller can be connected between the first power supply terminal C and the second power supply terminal D to provide power to the relevant load of the wire controller U1.

[0028] When the distance between the wired controller and the main control board 20 is long, and the first connecting line 31 and the second connecting line 32 need to transmit power over a long distance, there will be a certain amount of power consumption and line loss on the first connecting line 31. The voltage detection module 14 is used to obtain the working voltage between the first power supply terminal C and the second power supply terminal D when the main control board 20 is connected to the first power supply terminal C through the first access control module 12. When the working voltage between the first power supply terminal C and the second power supply terminal D is less than the preset voltage, it indicates that the line loss on the first connecting line 31 is too high. The switching module 15 is used to control the main control board 20 to disconnect from the first power supply terminal C through the first access control module 12 when the working voltage is less than the preset voltage, and to control the backup power supply 11 to connect to the first power supply terminal C through the second access control module 13, switching the power supply from the main control board 20 to the backup power supply 11, thereby reducing the limitation of the communication distance on the line length during long-distance communication between the main control board 20 and the wired controller, reducing the requirements of the first connecting line 31, i.e., the power line, in order to save costs.

[0029] Please see Figure 2In some embodiments, the switching module 15 includes a controller U1 and a power supply switching unit 151. The controller U1 includes a control port and a detection port. The control port is connected to the power supply switching unit 151, and the detection port is connected to the voltage detection module 14. In this embodiment, the controller U1 is used to obtain the operating voltage detected by the voltage detection module 14 through the detection port. When the operating voltage is less than a preset voltage, the controller outputs a corresponding control signal to the power supply switching unit 151 through the control port. The power supply switching unit 151 is used to control the main control board 20 to disconnect from the first power supply terminal C through the first access control module 12 according to the corresponding control signal, and to control the backup power supply 11 to connect to the first power supply terminal C through the second access control module 13. This switches the power supply from the main control board 20 to the backup power supply 11, thereby alleviating the problem of transmission loss of the first connection line 31 due to increased power consumption of the wired controller when the main control board 20 communicates with the wired controller over long distances. At the same time, it can also reduce the limitation of the communication distance on the line length during long-distance communication between the main control board 20 and the wired controller, and reduce the requirements of the first connection line 31, i.e., the power line, to achieve the effect of saving costs.

[0030] If the operating voltage obtained by the controller U1 through the detection port is not greater than the preset voltage, it indicates that the line loss of the first connection line 31 is within the allowable range, and the main control board 20 can supply power to the line controller. At this time, the controller U1 will maintain the current state of the main control board 20 supplying power to the line controller.

[0031] As one embodiment, the power supply switching unit 151 includes a first resistor R1, a second resistor R2, and a first switching transistor Q1. One end of the first resistor R1 is connected to the control port (GPIO1 port in this embodiment), the other end of the first resistor R1 is connected to one end of the second resistor R2 and the first end of the first switching transistor Q1, the other end of the second resistor R2 is connected to the second connection terminal B, the second end of the first switching transistor Q1 is connected to the second connection terminal B, and the third end of the first switching transistor Q1 is connected to the first access control module 12 and the second access control module 13 respectively.

[0032] The first switching transistor Q1 includes a transistor. The first terminal of the first switching transistor Q1 is the base of the transistor, the second terminal of the first switching transistor Q1 is the emitter of the transistor, and the third terminal of the first switching transistor Q1 is the collector of the transistor.

[0033] After the wired controller and main control board 20 are powered on and initialized, the control port of controller U1 is in a low-level state, and the wired controller is powered by the main control board 20. Controller U1 obtains the operating voltage through the detection port (ADC port in this embodiment). If the current operating voltage is lower than the preset voltage, it is determined that the line loss is too large. In this case, the control port outputs a high-level signal, causing the first switching transistor Q1 to turn off. Subsequently, the first access control module 12 controls the main control board 20 to disconnect from the first power supply terminal C, and the second access control module 13 controls the backup power supply 11 to connect to the first power supply terminal C. In this embodiment, the first resistor R1 is used to implement current limiting protection, and the second resistor R2 is used to prevent the first switching transistor Q1 from being mis-turned on.

[0034] In some embodiments, the first access control module 12 includes a third resistor R3 and a second switch Q2. One end of the third resistor R3 and the first end of the second switch Q2 are both connected to the third end of the first switch Q1. The other end of the third resistor R3 and the second end of the second switch Q2 are both connected to the first connection terminal A. The third end of the second switch Q2 is connected to the first power supply terminal C. The second switch Q2 is a MOSFET, with its first end serving as the gate, its second end as the drain, and its third end as the source. The controller U1 controls the switching of the second switch Q2 by switching the first switch Q1 on and off, thereby controlling the power supply path between the main control board 20 and the wired controller side.

[0035] In some embodiments, the second access control module 13 includes a fourth resistor R4, a fifth resistor R5, a third switch Q3, and a fourth switch Q4. One end of the fourth resistor R4 and one end of the fifth resistor R5 are both connected to the first end of the third switch Q3. The other end of the fourth resistor R4 and the second end of the third switch Q3 are both connected to the positive terminal of the backup power supply 11. The third end of the third switch Q3 is connected to the first end of the fourth switch Q4. The second end of the fourth switch Q4 is connected to the positive terminal of the backup power supply 11. The third end of the fourth switch Q4 is connected to the first power supply terminal C. The third switch Q3 is a transistor, and the fourth switch Q4 is a MOSFET. The first end of the third switch Q3 is connected to the base of the transistor, the second end of the third switch Q3 is connected to the emitter of the transistor, and the third end of the third switch Q3 is connected to the collector of the transistor. The first end of the fourth switch Q4 is connected to the gate of the MOSFET, the second end of the second switch Q2 is connected to the drain of the MOSFET, and the third end of the second switch Q2 is connected to the source of the MOSFET. In this embodiment, when the controller U1 controls the second switch Q2 to turn off via the first switch Q1, the third switch Q3 turns on, causing the fourth switch Q4 to turn on, and the backup power supply 11 is connected to the circuit to provide power. When the controller U1 controls the second switch Q2 to turn on via the first switch Q1, the third switch Q3 turns off, causing the fourth switch Q4 to turn off, and the main control board 20 is connected to the circuit to provide power.

[0036] In some embodiments, the second access control module 13 further includes a sixth resistor R6, one end of which is connected to the first terminal of the fourth switch Q4, and the other end of which is connected to the third terminal of the fourth switch Q4. In this embodiment, the sixth resistor R6 serves as a pull-down resistor, which can effectively prevent the fourth switch Q4 from malfunctioning.

[0037] In some embodiments, the voltage detection module 14 includes a seventh resistor R7 and an eighth resistor R8. One end of the seventh resistor R7 is connected to the first power supply terminal C, and the other end of both the seventh resistor R7 and one end of the eighth resistor R8 are connected to the detection port of the controller U1. The other end of the eighth resistor R8 is connected to the second power supply terminal D. In this embodiment, the seventh resistor R7 and the eighth resistor R8 serve as a voltage divider. When the second switching transistor Q2 is turned on, the main control board 20 connects to the circuit to power the line controller, enabling the monitoring of line loss.

[0038] This application also provides a power supply circuit for a wired controller. Since the power supply circuit for the wired controller has been described in detail above, it will not be repeated here.

[0039] This application also provides an air conditioner that includes the above-described wired controller. Since the wired controller has been described in detail above, it will not be repeated here.

[0040] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0041] The power supply circuit of the wired controller provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power supply circuit for a wired controller, characterized in that, The power supply circuit of the wired controller includes: The system includes a first connection terminal, a second connection terminal, a first power supply terminal, a second power supply terminal, and a backup power supply. The first connection terminal is used to connect to the main control board of the air conditioner via a first connection cable, and the second connection terminal is used to connect to the main control board via a second connection cable. The second connection terminal is connected to the second power supply terminal. A first access control module and a second access control module are connected, wherein the first access control module is connected between the first connection terminal and the first power supply terminal; and the second access control module is connected between the backup power supply and the first power supply terminal. A voltage detection module is connected to the first power supply terminal and the second power supply terminal respectively; the voltage detection module is used to obtain the working voltage between the first power supply terminal and the second power supply terminal when the main control board is connected to the first power supply terminal through the first access control module; A switching module is provided, which is connected to the voltage detection module, the first access control module, and the second access control module respectively. When the operating voltage is less than a preset voltage, the switching module controls the main control board to disconnect from the first power supply terminal through the first access control module, and controls the backup power supply to connect to the first power supply terminal through the second access control module.

2. The power supply circuit of the wired controller according to claim 1, characterized in that, The switching module includes a controller and a power supply switching unit. The controller includes a control port and a detection port. The control port is connected to the power supply switching unit, and the detection port is connected to the voltage detection module. The controller is used to obtain the operating voltage through the detection port, and when the operating voltage is less than the preset voltage, it outputs a corresponding control signal to the power supply switching unit through the control port. The power supply switching unit is used to control the main control board to disconnect from the first power supply terminal through the first access control module according to the corresponding control signal, and to control the backup power supply to connect to the first power supply terminal through the second access control module.

3. The power supply circuit of the wired controller according to claim 2, characterized in that, The power supply switching unit includes a first resistor, a second resistor, and a first switching transistor. One end of the first resistor is connected to the control port, the other end of the first resistor is connected to one end of the second resistor and the first end of the first switching transistor, the other end of the second resistor is connected to the second connection terminal, the second end of the first switching transistor is connected to the second connection terminal, and the third end of the first switching transistor is connected to the first access control module and the second access control module, respectively.

4. The power supply circuit of the wired controller according to claim 3, characterized in that, The first access control module includes a third resistor and a second switch. One end of the third resistor and the first end of the second switch are both connected to the third end of the first switch. The other end of the third resistor and the second end of the second switch are both connected to the first connection terminal. The third end of the second switch is connected to the first power supply terminal.

5. The power supply circuit of the wired controller according to claim 3, characterized in that, The second access control module includes a fourth resistor, a fifth resistor, a third switch, and a fourth switch; one end of the fourth resistor and one end of the fifth resistor are both connected to the first end of the third switch, the other end of the fourth resistor and the second end of the third switch are both connected to the positive terminal of the backup power supply, the third end of the third switch is connected to the first end of the fourth switch, the second end of the fourth switch is connected to the positive terminal of the backup power supply, and the third end of the fourth switch is connected to the first power supply terminal.

6. The power supply circuit of the wired controller according to claim 5, characterized in that, The second access control module further includes a sixth resistor, one end of which is connected to the first end of the fourth switching transistor, and the other end of which is connected to the third end of the fourth switching transistor.

7. The power supply circuit of the wired controller according to claim 3, characterized in that, The voltage detection module includes a seventh resistor and an eighth resistor. One end of the seventh resistor is connected to the first power supply terminal, and the other end of the seventh resistor and one end of the eighth resistor are both connected to the detection port of the controller. The other end of the eighth resistor is connected to the second power supply terminal.

8. The power supply circuit of the wired controller according to claim 3, characterized in that, The first switching transistor includes a transistor, the first terminal of the first switching transistor is the base of the transistor, the second terminal of the first switching transistor is the emitter of the transistor, and the third terminal of the first switching transistor is the collector of the transistor.

9. A wired controller, characterized in that, The wired controller includes a power supply circuit for the wired controller as described in any one of claims 1-8.

10. An air conditioner, characterized in that, The air conditioner includes the wired controller as described in claim 9.

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