Air conditioning system, awakening method, starting method, controller and main control board

Abstract

The invention discloses an air conditioning system, an awakening method, a starting method, a controller and a main control board. The air conditioning system comprises a direct current power supply, an S line and a reference potential point, wherein the S line and the reference potential point are connected to the indoor side of a current loop communication circuit; the auxiliary wake-up branch is connected with an S line of the current loop communication circuit and a capacitor assembly of the first switching power supply on the outdoor side; the current loop communication circuit comprises an indoor data sending optocoupler, and a light sensing end of the indoor data sending optocoupler is connected with a reference potential point and an N line of the current loop communication circuit; under the condition that the power supply switch is switched off and the photosensitive end of the indoor data sending optocoupler is switched on, an energy charging loop for charging the capacitor assembly of the first switching power supply is formed between the direct current power supply and the reference potential point through an S line of the current loop communication circuit and the auxiliary wake-up branch; and the outdoor main control board is started by utilizing voltage at two ends of the capacitor assembly of the first switching power supply. By arranging the auxiliary wake-up branch and the current loop communication circuit, the space for arranging elements on the indoor main control board can be saved.

Description

Technical Field

[0001] This application relates to the field of air conditioner control technology, and in particular to an air conditioning system, a wake-up method, a start-up method, a controller, and a main control board. Background Technology

[0002] In inverter split air conditioners, the communication between the indoor and outdoor units is mostly through current loop communication, which features strong anti-interference capabilities and low cost. To achieve low-power standby, the indoor main control board typically has a high-power relay reserved to cut off the power supply to the outdoor unit, thereby reducing the overall power consumption when standby is needed. If cooling or heating is required in standby mode, the indoor main control board controls this high-power relay to activate, supplying power to the outdoor unit and waking up the outdoor main control board.

[0003] As air conditioners add more and more functions, the indoor main control board needs to accommodate more components in a limited space, which usually requires miniaturization of the components. However, high-power relays have a large power load and are large in size and height, making it difficult to miniaturize them. Summary of the Invention

[0004] This embodiment provides an air conditioning system, a wake-up method, a start-up method, a controller, and a main control board, which can save space for the layout of components on the indoor main control board.

[0005] In a first aspect, embodiments of the present invention provide an air conditioning system, wherein an indoor main control board and an outdoor main control board of the air conditioning system are provided with a current loop communication circuit, the current loop communication circuit being connected to the AC input terminal of a first switching power supply of the outdoor main control board via an L line and a N line on the outdoor side; the air conditioning system further includes: a DC power supply, connected to the S line of the current loop communication circuit and a reference potential point on the indoor side; an auxiliary wake-up branch, connected to the S line of the current loop communication circuit and the capacitor assembly of the first switching power supply on the outdoor side; and a power supply switch, disposed on the outdoor side between the L line of the current loop communication circuit and the AC input terminal of the first switching power supply; the current loop communication circuit includes an indoor data transmission optocoupler, the photosensitive end of the indoor data transmission optocoupler being connected to the reference potential point and the N line of the current loop communication circuit; when the power supply switch is off and the photosensitive end of the indoor data transmission optocoupler is on, the DC power supply and the reference potential point form a charging loop through the S line of the current loop communication circuit and the auxiliary wake-up branch to charge the capacitor assembly of the first switching power supply, so as to start the outdoor main control board using the voltage across the capacitor assembly of the first switching power supply.

[0006] The air conditioning system provided by the embodiments of the present invention has at least the following beneficial effects: The embodiments of this application provide a DC power supply and an auxiliary wake-up branch, which can charge the capacitor component by conducting the DC power supply, S-line and auxiliary wake-up branch through the indoor data transmission optocoupler when the outdoor main control board is in standby mode, and quickly start the outdoor main control board through the capacitor component, thereby improving the efficiency of waking up the outdoor main control board, saving space for the layout of components on the indoor main control board, reducing the production cost of the indoor main control board and improving the anti-interference capability of the air conditioning system.

[0007] In the aforementioned air conditioning system, the first switching power supply includes a first rectifier bridge circuit and a first transformer. The first rectifier bridge circuit is connected to the primary side of the first transformer. The capacitor assembly of the first switching power supply is connected in parallel with the secondary side of the first transformer. The connection point between the capacitor assembly of the first switching power supply and the secondary side of the first transformer is connected to the main control chip of the outdoor main control board. The primary and secondary sides of the first transformer share a common ground.

[0008] In the aforementioned air conditioning system, the first switching power supply further includes a first diode, the positive terminal of the secondary side of the first transformer is connected to the positive terminal of the first diode, and the negative terminal of the first diode is connected to the negative terminal of the secondary side of the first transformer through the capacitor assembly of the first switching power supply.

[0009] In the aforementioned air conditioning system, the auxiliary wake-up branch includes a unidirectional conducting element and a voltage divider resistor. The positive end of the unidirectional conducting element is connected to the S-line of the current loop communication circuit, the negative end of the unidirectional conducting element is connected to one end of the voltage divider resistor, and the other end of the voltage divider resistor is connected to the negative terminal of the first diode.

[0010] In the above-mentioned air conditioning system, the first switching power supply further includes a voltage conversion circuit. The connection point between the capacitor component of the first switching power supply and the secondary side of the first transformer is connected to the voltage input terminal of the voltage conversion circuit, and the voltage output terminal of the voltage conversion circuit is connected to the main control chip of the outdoor main control board.

[0011] In the aforementioned air conditioning system, the current loop communication circuit is connected to the second switching power supply of the indoor main control board via L-line and N-line on the indoor side. The second switching power supply includes a second rectifier bridge circuit and a second transformer. The second rectifier bridge circuit is connected to the primary side of the second transformer, and the secondary side of the second transformer is connected to the DC power supply.

[0012] In the aforementioned air conditioning system, the DC power supply includes a clamping capacitor and a second diode. The anode of the first diode is connected to the anode of the secondary side of the second transformer. One end of the clamping capacitor is connected to the cathode of the first diode as the anode of the DC power supply, and the other end of the clamping capacitor is connected to the cathode of the secondary side of the second transformer.

[0013] In the aforementioned air conditioning system, the current loop communication circuit further includes a first resistor and an indoor data receiving optocoupler. The light-emitting end of the indoor data receiving optocoupler is connected in parallel with the first resistor, and the light-emitting end of the indoor data receiving optocoupler is connected to the neutral line (N line) of the current loop communication circuit and the photosensitive end of the indoor data transmitting optocoupler.

[0014] In the aforementioned air conditioning system, the air conditioning system further includes a charging detection module. The sampling end of the charging detection module is connected to the photosensitive end of the indoor data receiving optocoupler, and the output end of the charging detection module is used to output a charging signal corresponding to the charging current in the charging circuit.

[0015] In the aforementioned air conditioning system, the air conditioning system further includes a signal amplification and shaping circuit, the input terminal of which is connected to the photosensitive end of the indoor data receiving optocoupler.

[0016] In the aforementioned air conditioning system, the signal amplification and shaping circuit includes a switching transistor and a second resistor. The first switching pin of the switching transistor is connected to a constant voltage source through the second resistor, the second switching pin of the switching transistor is grounded, the control pin of the switching transistor is connected to the input terminal of the signal amplification and shaping circuit, and the connection point between the first switching pin of the switching transistor and the second resistor is connected to the output terminal of the signal amplification and shaping circuit.

[0017] Secondly, embodiments of the present invention also provide a wake-up method, applied to the indoor main control board of the air conditioning system described above, the wake-up method comprising:

[0018] In response to the outdoor unit wake-up command, the light-emitting end of the indoor data transmission optocoupler is controlled to turn on the photosensitive end of the indoor data transmission optocoupler, so as to form the charging circuit to charge the capacitor component of the first switching power supply.

[0019] When the charging signal is detected to be lower than a preset value, the light-emitting end of the indoor data transmitting optocoupler is controlled to cut off the photosensitive end of the indoor data transmitting optocoupler. The charging signal is obtained by sampling the charging current in the charging circuit.

[0020] The wake-up method provided by the embodiments of the present invention has at least the following beneficial effects: When the outdoor main control board is in standby mode, the embodiments of this application control the indoor data transmission optocoupler to conduct the DC power supply, the S-line, and the auxiliary wake-up branch to charge the capacitor assembly, and quickly start the outdoor main control board through the capacitor assembly, thereby improving the efficiency of waking up the outdoor main control board, saving space for the layout of components on the indoor main control board, and reducing the production cost of the indoor main control board; by detecting the charging signal, the light-emitting end of the indoor data transmission optocoupler is controlled to be cut off, so that the indoor main control board can quickly communicate with the outdoor main control board, thereby improving the operating efficiency and anti-interference capability of the air conditioning system.

[0021] In the above wake-up method, the current loop communication circuit further includes a first resistor and an indoor data receiving optocoupler. The light-emitting end of the indoor data receiving optocoupler is connected in parallel with the first resistor. The light-emitting end of the indoor data receiving optocoupler is connected to the N line of the current loop communication circuit and the photosensitive end of the indoor data transmitting optocoupler. The air conditioning system further includes a charging detection module. The sampling end of the charging detection module is connected to the photosensitive end of the indoor data receiving optocoupler. The output end of the charging detection module outputs the charging signal to the indoor main control board.

[0022] In the above wake-up method, after controlling the light-emitting end of the indoor data transmission optical coupler to cut off the photosensitive end of the indoor data transmission optical coupler, the wake-up method further includes:

[0023] After a preset delay period, a confirmation command is sent to the outdoor main control board through the current loop communication circuit, and the system waits for a confirmation response command from the outdoor main control board.

[0024] If the confirmation response instruction is not received within the response time threshold, the light-emitting end of the indoor data transmission optocoupler is recontrolled to make the photosensitive end of the indoor data transmission optocoupler conduct.

[0025] In the above wake-up method, the wake-up method further includes:

[0026] If no confirmation response is received within the response time threshold, the number of failures is recorded;

[0027] When the number of failures reaches a preset number, a fault alert will be issued.

[0028] Thirdly, embodiments of the present invention also provide a startup method, applied to the outdoor main control board of the air conditioning system described above, the startup method comprising:

[0029] After being powered on and awakened, the power supply switch is closed.

[0030] The startup method provided by the embodiments of the present invention has at least the following beneficial effects: After being awakened, the outdoor main control board of the present application closes the power supply switch and connects the L line to the AC input terminal of the first switching power supply, thereby enabling the outdoor unit of the air conditioning system to start quickly after being connected to the external power supply, and improving the operating efficiency of the air conditioning system.

[0031] In the above startup method, the startup method further includes:

[0032] The outdoor data receiving optocoupler of the current loop communication circuit is connected and waits to receive the confirmation command sent by the indoor main control board;

[0033] Upon receiving the confirmation command, an confirmation response command is sent to the indoor main control board via the outdoor data transmission optocoupler of the current loop communication circuit.

[0034] Fourthly, embodiments of the present invention also provide a controller, including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the wake-up method or startup method as described above.

[0035] The controller provided by the embodiments of the present invention has at least the following beneficial effects: when the outdoor main control board is in standby mode, it controls the indoor data transmission optocoupler to conduct the DC power supply, the S-line, and the auxiliary wake-up branch to charge the capacitor assembly, and quickly starts the outdoor main control board through the capacitor assembly, thereby improving the efficiency of waking up the outdoor main control board, saving space for the layout of components on the indoor main control board, and reducing the production cost of the indoor main control board; by detecting the charging signal, it controls whether the light-emitting end of the indoor data transmission optocoupler is cut off, so that the indoor main control board can quickly communicate with the outdoor main control board, thereby improving the operating efficiency and anti-interference capability of the air conditioning system.

[0036] Fifthly, embodiments of the present invention also provide a main control board, including the controller described above.

[0037] The main control board provided according to the embodiments of the present invention has at least the following beneficial effects: when the outdoor main control board is in standby mode, it controls the indoor data transmission optocoupler to conduct the DC power supply, the S-line and the auxiliary wake-up branch to charge the capacitor assembly, and quickly starts the outdoor main control board through the capacitor assembly, thereby improving the efficiency of waking up the outdoor main control board, saving space for the layout of components on the indoor main control board, and reducing the production cost of the indoor main control board; by detecting the charging signal, it controls whether the light-emitting end of the indoor data transmission optocoupler is cut off, so that the indoor main control board can quickly communicate with the outdoor main control board, thereby improving the operating efficiency and anti-interference capability of the air conditioning system.

[0038] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0039] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0040] Figure 1 This is a circuit structure diagram of an air conditioning system provided in an embodiment of the present invention;

[0041] Figure 2 This is a circuit structure diagram of an air conditioning system in the wake-up state provided by an embodiment of the present invention;

[0042] Figure 3 This is a circuit structure diagram of an air conditioning system in a communication state provided by an embodiment of the present invention;

[0043] Figure 4 This is a flowchart of a wake-up method provided in an embodiment of the present invention;

[0044] Figure 5 This is a flowchart of a wake-up method provided in another embodiment of the present invention;

[0045] Figure 6 This is a flowchart of a wake-up method provided in another embodiment of the present invention;

[0046] Figure 7 This is a flowchart of a startup method provided in an embodiment of the present invention. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., which indicate the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0049] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0050] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0051] This invention provides an air conditioning system that, by setting a first temperature sensor and a compressor, enables the control board to accurately control the start and stop time of the compressor based on the target size of the ice cubes and the water temperature. This avoids situations where the ice cubes cannot meet the usage requirements due to the ice-making time being too short or too long, thereby accurately controlling the size of the ice cubes and ensuring the uniformity of the ice cube size.

[0052] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0053] Please see Figure 1 , Figure 1 A circuit diagram of an air conditioning system according to an embodiment of the present invention is shown. Figure 1 As shown, in this embodiment of the air conditioning system, a current loop communication circuit 120 is provided between the indoor main control board 100 and the outdoor main control board 200. The current loop communication circuit 120 is connected to the AC input terminal of the first switching power supply 210 of the outdoor main control board 200 via L and N lines on the outdoor side. The air conditioning system also includes: a DC power supply 110, which is connected to the S line and the reference potential point of the current loop communication circuit 120 on the indoor side; an auxiliary wake-up branch 220, which is connected to the S line of the current loop communication circuit 120 and the capacitor assembly E6 of the first switching power supply 210 on the outdoor side; and a power supply switch 230, which is set on the outdoor side at the L line of the current loop communication circuit 120. The line is connected to the AC input terminal of the first switching power supply 210; the current loop communication circuit 120 includes an indoor data transmission optocoupler IC1, the photosensitive end of the indoor data transmission optocoupler IC1 is connected to the reference potential point and the N line of the current loop communication circuit; when the power supply switch 230 is off and the photosensitive end of the indoor data transmission optocoupler IC1 is on, the DC power supply 110 and the reference potential point form a charging loop to charge the capacitor component E6 of the first switching power supply 210 through the S line of the current loop communication circuit 120 and the auxiliary wake-up branch 220, so as to start the outdoor main control board 200 by using the voltage across the capacitor component E6 of the first switching power supply 210.

[0054] By setting up a DC power supply 110 and an auxiliary wake-up branch 220, when the outdoor main control board 200 is in standby mode, the indoor data transmission optocoupler IC1 can be used to conduct the DC power supply 110, the S-line, and the auxiliary wake-up branch 220 to charge the capacitor component E6, and the outdoor main control board 200 can be quickly started through the capacitor component E6. This improves the efficiency of waking up the outdoor main control board 200, saves space for the components on the indoor main control board 100, reduces the production cost of the indoor main control board 100, and improves the anti-interference capability of the air conditioning system.

[0055] It is understandable that the indoor main control board 100 and the outdoor main control board 200 are connected by three wires, namely L line, N line and S line. L1, N1 and S1 on the side of the indoor main control board 100 are wiring terminals, and L2, N2 and S2 on the side of the outdoor main control board 200 are wiring terminals.

[0056] Existing air conditioner outdoor units typically employ a current-loop communication module and a power supply control circuit. After the outdoor unit is powered on, the current-loop communication module controls the output of the power supply circuit to provide power, enabling the main controller and other loads in the outdoor unit to operate. When the indoor unit sends a shutdown signal to the outdoor unit, the main controller stops the loads in the outdoor unit, and the current-loop communication module stops operating. This means the indoor unit sends a shutdown signal to the outdoor unit, causing the power supply circuit to stop outputting power, thus cutting off power to the main controller and other loads in the outdoor unit. This reduces the power consumption of the outdoor unit in standby mode or when it unexpectedly disconnects from the indoor unit and shuts down safely, thereby reducing the standby power consumption of the air conditioner to meet low-energy consumption requirements. This structure requires high-power relays on both the indoor and outdoor unit sides. In standby mode, the power supply to the outdoor unit is disconnected to achieve low-power standby. When cooling or heating is needed, the high-power relays activate, waking the outdoor unit from its power-off state and putting it into cooling or heating mode. This greatly increases the structural complexity of the indoor unit's main control board, making it difficult to miniaturize and affecting the production cost and layout convenience of the indoor unit's main control board.

[0057] It is understandable that, such as Figure 1 As shown, the indoor data transmitting optocoupler IC1, the outdoor data receiving optocoupler IC2, the indoor data receiving optocoupler IC3, and the outdoor data transmitting optocoupler IC4 constitute a current loop communication circuit 120. The current loop communication circuit 120 is powered by a 24V voltage generated by a DC power supply 110, which is applied to the S-line. Since the DC power supply 110 is generated by a secondary winding of the second transformer TR2 in the indoor main control board 100, its cost is lower and fewer components are used to generate 24V, which is more conducive to the miniaturization of the indoor main control board 100.

[0058] Please see Figure 2 , Figure 2This diagram illustrates the circuit structure of an air conditioning system in a wake-up state according to an embodiment of the present invention. Figure 2 As shown, in the embodiment of this application, when the power supply switch 230 is off and the photosensitive end of the indoor data transmission optocoupler IC1 is on, the DC power supply 110 and the reference potential point form a charging circuit to charge the capacitor component E6 of the first switching power supply 210 through the S line of the current loop communication circuit 120 and the auxiliary wake-up branch 220.

[0059] In practical applications, when a user needs cooling or heating, the indoor main control board 100 needs to wake up the outdoor main control board 200, which is currently powered down, and charge the capacitor component E6 of the first switching power supply 210. At this time, the indoor data transmission optocoupler IC1 is activated, where the maximum conduction current is 60mA. The current flow direction is as follows: Figure 2 As shown, the current flows from the DC power supply 110 through S1 to S2, through the auxiliary energized unidirectional conducting element D4 and the first diode D5, through E6, and through the hot ground into D13 in the first rectifier bridge circuit 211. It then flows through N2 to N1, and then through the indoor data receiving optocoupler IC3 to the indoor data transmitting optocoupler IC1, returning to the reference potential point of the DC power supply 110, thus completing the charging of the capacitor component E6 of the first switching power supply 210. Specifically, the capacitance of the capacitor component E6 is 2000uF. According to the capacitor charging formula: C*U=I*t, constant current charging is performed at 50mA in the charging circuit. The charging time is calculated as follows: T=12*2000*10 -6 / 50*10 -3 =0.48s. Therefore, the charging loop formed by the S-line of the current loop communication circuit 120 and the auxiliary wake-up branch 220 between the DC power supply 110 and the reference potential point can quickly charge the capacitor component E6 of the first switching power supply 210, which can quickly supply power to the outdoor main control board 200 and improve the operating efficiency of the air conditioning system.

[0060] Please see Figure 3 , Figure 3 This diagram illustrates the circuit structure of an air conditioning system in a communication state, according to an embodiment of the present invention. Figure 3As shown, the indoor data transmitting optocoupler IC1, the outdoor data receiving optocoupler IC2, the indoor data receiving optocoupler IC3, and the outdoor data transmitting optocoupler IC4 form a current loop communication circuit 120. The indoor main control board 100 sends communication signals to the outdoor main control board 200 through the indoor data transmitting optocoupler IC1. The outdoor main control board 200 receives and processes the signals through the indoor data receiving optocoupler IC3, and sends a response signal back to the indoor data transmitting optocoupler IC1 through the outdoor data transmitting optocoupler IC4. The indoor main control board 100 receives and processes the response signal through the outdoor data receiving optocoupler IC2.

[0061] Understandably, when the outdoor main control board 200 is woken up, it will connect the photosensitive end of the outdoor data transmission optocoupler IC4 and wait to receive commands from the indoor main control board 100. The current flow during this communication process is as follows: Figure 3 As shown, current flows from the output terminal of the DC power supply 110, passes through S1 to S2, flows into the outdoor data receiving optocoupler IC2, then to the outdoor data transmitting optocoupler IC4, passes through D2, then flows from N2 to N1, and from N1 flows into the indoor data receiving optocoupler IC3, reaching the indoor data transmitting optocoupler IC1, forming a loop and completing a communication process. During this process, only a small amount of current flows through the auxiliary wake-up branch 220 into the first rectifier bridge circuit 211, because the first rectifier bridge circuit 211 does not form a loop with the DC power supply 110; the two are in an open state. Therefore, this structure can save one relay on the indoor main control board 100 side, or avoid using a double-pole or single-pole double-throw relay, reducing the production cost of the indoor main control board 100.

[0062] In other embodiments, the first switching power supply 210 includes a first rectifier bridge circuit 211 and a first transformer TR1. The first rectifier bridge circuit 211 is connected to the primary side of the first transformer TR1. The capacitor component E6 of the first switching power supply 210 is connected in parallel with the secondary side of the first transformer TR1. The connection point between the capacitor component E6 of the first switching power supply 210 and the secondary side of the first transformer TR1 is connected to the main control chip 240 of the outdoor main control board 200. The primary and secondary sides of the first transformer TR1 share a common ground.

[0063] It is understandable that the first rectifier bridge circuit 211 is a rectifying circuit, consisting of four diodes (D9, D10, D13, D14) connected in a bridge structure. Its function is to convert the AC output from the AC transformer circuit into unidirectional pulsating DC. The first rectifier bridge circuit 211 is connected to the primary side of the first transformer TR1, and the capacitor assembly E6 is connected in parallel with the secondary side of the first transformer TR1. The connection point between the capacitor assembly E6 and the secondary side of the first transformer TR1 is connected to the main control chip 240 of the outdoor main control board 200. This structure ensures that the main control chip 240 can be powered and woken up when the capacitor assembly E6 is fully charged. It also ensures that when the first switching power supply 210 is connected to the mains power, the first rectifier bridge circuit 211 converts the AC mains power into DC power, and after voltage regulation by the first transformer TR1, it powers the main control chip 240 of the outdoor main control board 200, preventing the main control chip 240 from losing power due to a decrease in the power of the capacitor assembly E6.

[0064] In other embodiments, the first switching power supply 210 further includes a first diode D5, the positive terminal of the secondary side of the first transformer TR1 is connected to the positive terminal of the first diode D5, and the negative terminal of the first diode D5 is connected to the negative terminal of the secondary side of the first transformer TR1 through the capacitor assembly E6 of the first switching power supply 210.

[0065] It is understandable that a diode is an electronic device made of semiconductor materials (silicon, selenium, germanium, etc.). A diode has two electrodes: a positive electrode, also called the anode, and a negative electrode, also called the cathode. When a forward voltage is applied between the two electrodes, the diode conducts; when a reverse voltage is applied, the diode is cut off. Therefore, the conduction and cutoff of a diode are equivalent to the on and off states of a switch. A first diode D5 is installed on the first switching power supply 210, and the positive terminal of the secondary side of the first transformer TR1 is connected to the positive terminal of the first diode D5. The negative terminal of the secondary side of the first transformer TR1 is connected to the negative terminal of the first diode D5 through the capacitor assembly E6. For example... Figure 2 As shown, when the power supply switch 230 is off, the DC power supply 110 charges the capacitor component E6 of the first switching power supply 210 through the charging loop formed by the S-line of the current loop communication circuit 120 and the auxiliary wake-up branch 220, which is connected to the reference potential point. At this time, since the negative terminal of the first diode D5 is connected to the capacitor component E6, a reverse voltage is applied between the two terminals of the first diode D5, and the first diode D5 is in the cut-off state. The current cannot pass through the first diode D5, and instead flows through the capacitor component E6 to D13 in the first rectifier bridge circuit 211, forming a charging loop and ensuring the charging efficiency of the capacitor component E6 during the wake-up process. Figure 3As shown, when the outdoor main control board 200 is woken up and the power supply switch 230 is closed, the first transformer TR1 outputs a positive voltage to the first diode D5. The first diode D5 is in a conducting state, and the current can flow through the first diode D5 to the main control chip 240 to achieve the effect of stable power supply to the main control chip 240.

[0066] In other embodiments, the auxiliary wake-up branch 220 includes a unidirectional conducting element D4 and a voltage divider resistor R5. The positive end of the unidirectional conducting element D4 is connected to the S-line of the current loop communication circuit 120, and the negative end of the unidirectional conducting element D4 is connected to one end of the voltage divider resistor R5. The other end of the voltage divider resistor R5 is connected to the negative terminal of the first diode D5.

[0067] As can be understood, a voltage divider resistor refers to the resistance of a conductor connected in series with a circuit. When the total voltage remains constant, connecting a voltage divider resistor in series with a circuit will divide the voltage, causing a portion of the voltage to drop across the resistor and thus reducing the voltage across that part of the circuit. For example... Figure 2 As shown, to ensure that the voltage in the charging circuit matches the charging voltage of capacitor component E6, a voltage divider resistor R5 needs to be set in the charging circuit to ensure the charging efficiency and charging voltage stability of capacitor component E6, and to prevent overvoltage from occurring across capacitor component E6 and damaging it. Specifically, the unidirectional conducting element D4 is a diode, such as... Figure 2 As shown, when the power supply switch 230 is off, the DC power supply 110 charges the capacitor assembly E6 of the first switching power supply 210 through the charging loop formed by the S-line of the current loop communication circuit 120 and the auxiliary wake-up branch 220. At this time, since the positive terminal of the unidirectional conducting element D4 is connected to the S-line of the current loop communication circuit 120 and the negative terminal of the unidirectional conducting element D4 is connected to the negative terminal of the first diode D5, both sides of the unidirectional conducting element D4 are positively charged, and the unidirectional conducting element D4 is in a conducting state. Current can flow through the unidirectional conducting element D4 to the voltage divider resistor R5 and the capacitor assembly E6; Figure 3 As shown, when the outdoor main control board 200 is woken up and the power supply switch 230 is closed, the first transformer TR1 outputs a reverse voltage to the unidirectional conducting element D4 through the first diode D5. The unidirectional conducting element D4 is in the cut-off state, and the current cannot pass through the unidirectional conducting element D4, thereby preventing the current from entering the current loop communication circuit 120 and affecting the normal communication between the indoor main control board 100 and the outdoor main control board 200 of the air conditioning system, thus ensuring the operational stability of the air conditioning system.

[0068] In other embodiments, the first switching power supply 210 further includes a voltage conversion circuit 212. The connection point between the capacitor component E6 of the first switching power supply 210 and the secondary side of the first transformer TR1 is connected to the voltage input terminal of the voltage conversion circuit 212, and the voltage output terminal of the voltage conversion circuit 212 is connected to the main control chip 240 of the outdoor main control board 200.

[0069] Understandably, when the power switch 230 is closed, the first transformer TR1 supplies power to the main control chip 240 of the outdoor main control board 200 through the first diode D5. To ensure that the voltage applied to the main control chip 240 by the first transformer TR1 is compatible with the operating voltage of the main control chip 240, a voltage conversion circuit 212 needs to be set between the secondary side of the first transformer TR1 and the main control chip 240. Specifically, the DC voltage converter is used to convert the voltage of the DC power supply into the required voltage and current, mainly including different types such as boost, buck, buck-boost, and inverting. For example, the core component of the boost and buck converters is the converter, which obtains the required output voltage by adjusting the input voltage; the inverting converter achieves voltage conversion by changing the positive and negative polarities of the DC power supply. In practical applications, the voltage conversion circuit 212 can achieve voltage conversion by setting up a low-dropout (LDO) regulator, a Zener diode, multiple diodes in series, etc., which will not be elaborated here.

[0070] In other embodiments, the current loop communication circuit 120 is connected to the second switching power supply 130 of the indoor main control board 100 via L line and N line on the indoor side. The second switching power supply 130 includes a second rectifier bridge circuit 131 and a second transformer TR2. The second rectifier bridge circuit 131 is connected to the primary side of the second transformer TR2, and the secondary side of the second transformer TR2 is connected to the DC power supply 110.

[0071] Understandably, similar to the structure of the first switching power supply 210 described above, the second switching power supply 130 of the current loop communication circuit 120 is equipped with a second rectifier bridge circuit 131 and a second transformer TR2 to ensure a stable DC voltage is applied within the current loop communication circuit 120. In practical applications, the DC power supply 110 can be generated by a secondary winding of the existing main transformer in the indoor main control board 100. The second switching power supply 130 is connected to the mains power and outputs a stable DC current through the second rectifier bridge circuit 131 and the second transformer TR2. This results in lower manufacturing costs for the DC power supply 110 and fewer components needed to generate 24V, which is more conducive to the miniaturization of the indoor main control board 100.

[0072] In other embodiments, the DC power supply 110 includes a clamping capacitor E1 and a second diode D3. The positive terminal of the second diode D3 is connected to the positive terminal of the secondary side of the second transformer TR2. One end of the clamping capacitor E1 is connected to the negative terminal of the second diode D3 as the positive terminal of the DC power supply 110, and the other end of the clamping capacitor E1 is connected to the negative terminal of the secondary side of the second transformer TR2.

[0073] It is understandable that the working principle of capacitor clamping is based on the fundamental principle of capacitors. When the capacitor clamp is connected to a power supply voltage, an electric field is formed between the metal plates. The strength of the electric field is directly proportional to the power supply voltage and inversely proportional to the distance between the metal plates. When the power supply voltage stabilizes, the electric field strength of the capacitor clamp also stabilizes. When an unknown capacitor is connected between the two metal plates of the capacitor clamp, the unknown capacitor shares the electric field with the capacitor clamp. Since the electric field strength is directly proportional to the capacitance value, the electric field strength of the unknown capacitor will also stabilize, and the value of the unknown capacitor can be indirectly measured by measuring the voltage of the capacitor clamp. The clamping capacitor is installed in the feedback loop, playing a role in filtering and voltage regulation; in addition, the clamping capacitor blocks high-frequency noise and filters out interference signals appearing in the output signal. At the same time, when the input signal bias voltage changes, the clamping capacitor can stabilize the voltage and maintain the stability of the output signal. Therefore, the clamping capacitor E1 in the DC power supply 110 is mainly responsible for filtering and voltage regulation, preventing instability of the bias voltage at the output of the second transformer TR2. A clamping capacitor E1 and a second diode D3 are incorporated into the DC power supply 110. One end of the clamping capacitor E1 is connected to the negative terminal of the second diode D3, serving as the positive terminal of the DC power supply 110, thus ensuring the stability of the DC voltage output by the DC power supply 110. Similarly, the second diode D3 plays a role in voltage regulation and rectification in the DC power supply 110, further ensuring the output stability of the DC power supply 110.

[0074] In other embodiments, the current loop communication circuit 120 further includes a first resistor R1 and an indoor data receiving optocoupler IC3. The light-emitting terminal of the indoor data receiving optocoupler IC3 is connected in parallel with the first resistor R1, and the light-emitting terminal of the indoor data receiving optocoupler IC3 is connected to the N line of the current loop communication circuit and the photosensitive terminal of the indoor data transmitting optocoupler IC1.

[0075] Understandably, in order to ensure that the DC power supply 110 and the reference potential point form a charging circuit through the S-line of the current loop communication circuit 120 and the auxiliary wake-up branch 220 to charge the capacitor component E6 of the first switching power supply 210, a first resistor R1 is set between the indoor data transmitting optocoupler IC1 and the indoor data receiving optocoupler IC3. This is to ensure the voltage stability across the indoor data receiving optocoupler IC3 during the charging process of the capacitor component E6, and to avoid damage to the indoor data receiving optocoupler IC3 due to excessive voltage, which would affect the operational stability of the air conditioning system.

[0076] In other embodiments, the air conditioning system further includes a charging detection module 140, the sampling end of which is connected to the photosensitive end of the indoor data receiving optocoupler IC3, and the output end of the charging detection module 140 is used to output a charging signal corresponding to the charging current in the charging circuit.

[0077] Understandably, during the charging process of capacitor component E6, in order to ensure that the indoor main control board 100 can monitor the current in the charging circuit in real time to determine the charging status of capacitor component E6, the photosensitive end of the indoor data receiving optocoupler IC3 is connected to the sampling end of the charging detection module 140, and the charging signal corresponding to the charging current in the charging circuit is output through the output end of the charging detection module 140. Specifically, the detection device reads the output current of the photosensitive end of the indoor data receiving optocoupler IC3 and outputs a charging signal. In practical applications, the pin of the photosensitive end of the indoor data receiving optocoupler IC3 is connected to the analog-to-digital conversion pin of the MCU, and the charging current is detected by reading the output level of the indoor data receiving optocoupler IC3, and a charging signal is generated. Specifically, during the charging process of capacitor component E6, when the capacitor component E6 is almost fully charged, the charging current in the charging circuit will decrease, and the voltage detected by the MCU will decrease. When the voltage decreases to below a predetermined threshold voltage, it is considered that capacitor component E6 is fully charged. At this point, the indoor main control board 100 shuts down the indoor data transmission optocoupler IC1 and needs to delay for 500ms to communicate with the outdoor main control board 200. The method of generating a charging signal by reading the current magnitude is existing technology and will not be elaborated upon here.

[0078] In other embodiments, the air conditioning system further includes a signal amplification and shaping circuit 150, the input of which is connected to the photosensitive end of the indoor data receiving optocoupler IC3.

[0079] Understandably, since the amplitude and frequency of the signal to be measured output by the photosensitive end of the indoor data receiving optocoupler IC3, as well as the type of the signal wave, are unknown, the signal to be measured must first be amplified and shaped to become a pulse wave with an amplitude within a certain range, such as 3-5V, so that the indoor main control board 100 can correctly measure and read it.

[0080] In other embodiments, the signal amplification and shaping circuit 150 includes a switching transistor Q3 and a second resistor R2. The first switching pin of the switching transistor Q3 is connected to a constant voltage source through the second resistor R2. The second switching pin of the switching transistor Q3 is grounded. The control pin of the switching transistor Q3 is connected to the input terminal of the signal amplification and shaping circuit 150. The connection point between the first switching pin of the switching transistor Q3 and the second resistor R2 is connected to the output terminal of the signal amplification and shaping circuit 150.

[0081] As we can understand, a transistor, also known as a bipolar junction transistor (BJT) or crystal transistor, is a semiconductor device that controls current. Its function is to amplify weak signals into larger amplitude electrical signals, and it is also used as a contactless switch. The transistor is one of the basic semiconductor components, possessing current amplification capabilities, and is a core component of electronic circuits. A transistor is made by creating two closely spaced PN junctions on a semiconductor substrate. These two PN junctions divide the semiconductor into three parts: the middle part is the base region, and the two outer parts are the emitter and collector regions. There are two common arrangements: PNP and NPN. In practical applications, the output of the charging detection module 140 is connected to the switching transistor Q3 via R3 to amplify and shape the signal into a digital signal to facilitate normal communication between the indoor main control board 100 and the outdoor main control board 200. Then, the output of the signal amplification and shaping circuit 150 is connected to the connection point of the first switching pin of the switching transistor Q3 and the second resistor R2, so that the signal amplification and shaping circuit 150 can output a stable signal, thereby improving the communication success rate between the indoor main control board 100 and the outdoor main control board 200.

[0082] Please see Figure 4 , Figure 4 A flowchart illustrating a wake-up method provided by a second aspect embodiment of this application is shown. Figure 4 As shown, the wake-up method applied to the air conditioning system described above includes:

[0083] Step S1000: In response to the outdoor unit wake-up command, control the light-emitting end of the indoor data transmission optocoupler IC1 to turn on the light-sensing end of the indoor data transmission optocoupler IC1, so as to form a charging circuit to charge the capacitor component E6 of the first switching power supply 210.

[0084] It is understandable that, such as Figure 1 As shown, when the air conditioning system is powered on, the power supply switch 230 of the outdoor main control board 200 is off, and L2 and N2 do not form a circuit. At this time, the outdoor main control board 200 is not powered, and only the indoor main control board 100 is powered by the DC power supply 110. Moreover, the indoor main control board 100 enters the standby state when there is no user operation. Therefore, the air conditioning system can achieve low power consumption standby in this state.

[0085] Understandably, when the indoor environment meets the conditions for the outdoor unit to start, or when the user starts the air conditioning system via the indoor remote control, the indoor main control board 100 responds to the outdoor unit wake-up command, controlling the light-emitting terminal of the indoor data transmission optocoupler IC1 to turn on the light-sensing terminal of the indoor data transmission optocoupler IC1. The DC power supply 110 and the reference potential point are connected via the S-line of the current loop communication circuit 120 and the charging circuit of the auxiliary wake-up branch 220, charging the capacitor component E6 of the first switching power supply 210. For example... Figure 2As shown, the charging circuit can quickly and stably charge the capacitor component E6 to ensure that the outdoor main control board 200 can be powered on and started quickly.

[0086] Step S2000: When the charging signal is detected to be lower than the preset value, the light-emitting end of the indoor data transmission optocoupler IC1 is controlled to turn off the photosensitive end of the indoor data transmission optocoupler IC1, and the charging signal is obtained by sampling based on the charging current in the charging circuit.

[0087] Understandably, during the fast charging process of capacitor component E6, the indoor main control board 100 also monitors the current in the charging circuit in real time through the charging detection module 140. During charging, when the charge of capacitor component E6 decreases, the charging current in the charging circuit will decrease, and the voltage detected by the charging detection module 140 will decrease. When the detected charging signal is lower than a preset value, the indoor main control board 100 controls the light-emitting end of the indoor data transmission optocoupler IC1 to cut off the photosensitive end of the indoor data transmission optocoupler IC1, disconnecting the charging circuit and stopping the DC power supply 110 from charging capacitor component E6. Figure 3 As shown, the indoor main control board 100 and the outdoor main control board 200 communicate through the current loop communication circuit 120.

[0088] In other embodiments, the current loop communication circuit 120 further includes a first resistor R1 and an indoor data receiving optocoupler IC3. The light-emitting terminal of the indoor data receiving optocoupler IC3 is connected in parallel with the first resistor R1. The light-emitting terminal of the indoor data receiving optocoupler IC3 is connected to the neutral line (N line) of the current loop communication circuit 120 and the photosensitive terminal of the indoor data transmitting optocoupler IC1. The air conditioning system also includes a charging detection module 140. The sampling terminal of the charging detection module 140 is connected to the photosensitive terminal of the indoor data receiving optocoupler IC3. The output terminal of the charging detection module 140 outputs a charging signal to the indoor main control board 100. It is understood that the connection relationship between the first resistor R1, the indoor data receiving optocoupler IC3, and the charging detection module 140 is consistent with the connection relationship between the various components in the air conditioning system described above, and will not be repeated here.

[0089] Please see Figure 5 , Figure 5 A flowchart illustrating another embodiment of this application provides a wake-up method. For example... Figure 5 As shown, the wake-up method also includes:

[0090] Step S3100: After a preset delay period, send a confirmation command to the outdoor main control board 200 through the current loop communication circuit 120 and wait for the confirmation response command sent by the outdoor main control board 200.

[0091] Understandably, to ensure communication between the indoor main control board 100 and the outdoor main control board 200 via the current loop communication circuit 120, the main control board 100 sends an acknowledgment command to the outdoor main control board 200 after a preset delay. Understandably, latency, also known as delay, represents the time it takes to receive a data packet from a specific point in time. In some cases, latency is the time it takes for a packet to travel from the sending end to the receiving end, completing one cycle. The causes of network transmission latency include: transmission—the time it takes for a packet to travel at the speed of light between two locations; and transmission—the medium itself (whether fiber optic, wireless, or other media) causes some delay. Larger packets often cause longer delays than smaller packets. Routers and other processes, including gateways and nodes, spend time detecting potential changes to packet headers (e.g., altering the hop count in the time-to-live field). In this embodiment, the current loop communication circuit 120 consists of an indoor data transmission optocoupler IC1, an outdoor data reception optocoupler IC2, an indoor data reception optocoupler IC3, and an outdoor data transmission optocoupler IC4. The circuit traverses fewer nodes, allowing for a shorter preset delay time to ensure normal communication.

[0092] In practical applications, after a 500ms delay, the indoor main control board 100 sends a command to the outdoor main control board 200 through the current loop communication circuit 120 to confirm whether the outdoor main control board 200 has been woken up and whether its functions are normal. If an acknowledgment character (ACK) is received from the outdoor main control board 200 within 500ms, the entire wake-up process ends.

[0093] Step S3200: If no acknowledgment command is received within the response time threshold, the light-emitting end of the indoor data transmission optocoupler IC1 is recontrolled to make the photosensitive end of the indoor data transmission optocoupler IC1 conduct.

[0094] Understandably, if the indoor main control board 100 does not receive a confirmation response from the outdoor main control board 200 within the preset response time threshold after issuing a command, it will determine that the outdoor main control board 200 failed to wake up due to reasons such as unsuccessful charging of the capacitor component E6. The indoor main control board 100 then controls the light-emitting end of the indoor data transmission optocoupler IC1 to turn on the photosensitive end of the indoor data transmission optocoupler IC1, thereby re-executing the above step S1000 to re-wake up the outdoor main control board 200.

[0095] Please see Figure 6 , Figure 6 A flowchart illustrating another embodiment of this application provides a wake-up method. For example... Figure 6 As shown, the wake-up method also includes:

[0096] Step S3300: If no acknowledgment response is received within the response time threshold, record the number of failures.

[0097] Understandably, in practical applications, the indoor main control board 100 may be unable to receive confirmation commands from the outdoor main control board 200 when the air conditioning system malfunctions. For example, damage to the current loop communication circuit 120, DC power supply 110, or capacitor assembly E6 may prevent the outdoor main control board 200 from being properly woken up. To prevent the air conditioning system from entering a state of repeatedly waking up the outdoor main control board 200, which could damage other components, it is necessary to record the number of times the outdoor main control board 200 fails to wake up. Specifically, in the absence of a confirmation command, the failure count is incremented by one using a command to accurately record the number of failures. It is understood that recording the failure count using a command is existing technology and will not be elaborated upon here.

[0098] Step S3400: When the number of failures reaches the preset number, a fault reminder is issued.

[0099] Understandably, when the number of failures reaches a preset number, such as three times, that is, after the indoor main control board 100 executes the above steps S1000 to S3300 three times in a row, the indoor main control board 100 cannot receive the confirmation response command, it is determined that there is a fault in the air conditioning system that causes the outdoor main control board 200 to be unable to be woken up, and a fault reminder is issued to inform the user to troubleshoot the fault.

[0100] Please see Figure 7 , Figure 7 A flowchart illustrating a startup method provided by a third aspect embodiment of this application is shown. Figure 7 As shown, the starting method applied to the air conditioning system described above includes:

[0101] Step S4000: After being powered on and awakened, close the power supply switch 230.

[0102] It is understandable that, such as Figure 1 As shown, when the air conditioning system is powered on, the power supply switch 230 of the outdoor main control board 200 is off, and L2 and N2 do not form a circuit. At this time, the outdoor main control board 200 is not powered, and only the indoor main control board 100 is powered by the DC power supply 110. Moreover, the indoor main control board 100 enters the standby state when there is no user operation. Therefore, the air conditioning system can achieve low power consumption standby in this state.

[0103] It is understandable that when the indoor main control board 100 responds to the outdoor unit wake-up command, it forms a charging circuit for charging the capacitor assembly E6 of the first switching power supply 210. For example... Figure 2As shown, the charging circuit can quickly and stably charge the capacitor assembly E6 to ensure that the outdoor main control board 200 can be powered on and started quickly. After the capacitor assembly E6 is recharged, it supplies power to the main control chip 240 of the outdoor main control board 200, thus waking up the main control chip 240. Figure 3 As shown, in order to ensure that the load of the outdoor unit can be powered, the main control chip 240 controls the power supply switch 230 to close, so that the first switching power supply 210 is connected to the mains power, and supplies power to the load of the outdoor unit through the first rectifier bridge circuit 211 and the first transformer TR1.

[0104] Step S5000: Connect the outdoor data receiving optocoupler IC2 of the current loop communication circuit 120 and wait for the confirmation command sent by the indoor main control board 100.

[0105] It is understandable that, such as Figure 3 As shown, the indoor main control board 100 and the outdoor main control board 200 communicate via a current loop communication circuit 120. Specifically, the outdoor main control board 200 receives confirmation commands sent by the indoor main control board 100 by connecting the outdoor data receiving optocoupler IC2.

[0106] Step S6000: After receiving the confirmation command, send a confirmation response command to the indoor main control board 100 through the outdoor data transmission optocoupler IC4 of the current loop communication circuit 120.

[0107] Understandably, after receiving the confirmation command through the outdoor data receiving optocoupler IC2, the outdoor main control board 200 needs to respond to the confirmation command. Specifically, when the outdoor main control board 200 is normally woken up, that is, the main control chip 240 is powered normally and can operate normally, the outdoor main control board 200 sends a confirmation response command to the indoor main control board 100 through the outdoor data sending optocoupler IC4, and waits for the next command from the indoor main control board 100. The sending of the confirmation response command from the outdoor main control board 200 to the indoor main control board 100 through the outdoor data sending optocoupler IC4 is existing technology and will not be elaborated here.

[0108] Understandably, when the user turns off the air conditioner, the indoor main control board 100 sends a shutdown command to the outdoor main control board 200 through the current loop communication circuit 120. After receiving the shutdown command, the outdoor main control board 200 controls the power supply switch 230 to turn off. At the same time, the indoor main control board 100 shuts down the indoor data transmission optocoupler IC1 to complete the power-off operation, and the air conditioning system enters a low-energy standby state.

[0109] Fourthly, embodiments of this application provide a controller, including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the wake-up method or startup method as described above.

[0110] The controller provided according to the embodiments of this application has at least the following beneficial effects: by setting up a DC power supply 110 and an auxiliary wake-up branch 220, when the outdoor main control board 200 is in standby mode, the indoor data transmission optocoupler IC1 can be used to conduct the DC power supply 110, the S-line and the auxiliary wake-up branch 220 to charge the capacitor component E6, and the outdoor main control board 200 can be quickly started through the capacitor component E6, thereby improving the efficiency of waking up the outdoor main control board 200, saving space for the components on the indoor main control board 100, reducing the production cost of the indoor main control board 100 and improving the anti-interference capability of the air conditioning system.

[0111] Fifthly, embodiments of this application provide a main control board, including the controller described above.

[0112] The main control board provided according to the embodiments of this application has at least the following beneficial effects: by setting up a DC power supply 110 and an auxiliary wake-up branch 220, when the outdoor main control board 200 is in standby mode, the indoor data transmission optocoupler IC1 can be used to conduct the DC power supply 110, the S-line and the auxiliary wake-up branch 220 to charge the capacitor component E6, and the outdoor main control board 200 can be quickly started through the capacitor component E6, thereby improving the efficiency of waking up the outdoor main control board 200, saving space for the components on the indoor main control board 100, reducing the production cost of the indoor main control board 100 and improving the anti-interference capability of the air conditioning system.

[0113] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0114] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0115] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioning system, characterized in that, A current loop communication circuit is provided between the indoor main control board and the outdoor main control board of the air conditioning system. The current loop communication circuit is connected to the AC input terminal of the first switching power supply of the outdoor main control board via L and N lines on the outdoor side. The air conditioning system also includes: A DC power supply is provided, which connects the S-line and the reference potential point of the current loop communication circuit on the indoor side. The auxiliary wake-up branch connects the S-line of the current loop communication circuit and the capacitor assembly of the first switching power supply on the outdoor side. The power supply switch is located on the outdoor side between the L line of the current loop communication circuit and the AC input terminal of the first switching power supply. The current loop communication circuit includes an indoor data transmission optocoupler. The photosensitive end of the indoor data transmission optocoupler is connected to the reference potential point and the N line of the current loop communication circuit. When the power supply switch is off and the photosensitive end of the indoor data transmission optocoupler is on, the DC power supply and the reference potential point form a charging loop to charge the capacitor component of the first switching power supply through the S line of the current loop communication circuit and the auxiliary wake-up branch, so as to start the outdoor main control board using the voltage across the capacitor component of the first switching power supply.

2. The air conditioning system according to claim 1, characterized in that, The first switching power supply includes a first rectifier bridge circuit and a first transformer. The first rectifier bridge circuit is connected to the primary side of the first transformer. The capacitor assembly of the first switching power supply is connected in parallel with the secondary side of the first transformer. The connection point between the capacitor assembly of the first switching power supply and the secondary side of the first transformer is connected to the main control chip of the outdoor main control board. The primary and secondary sides of the first transformer share a common ground.

3. The air conditioning system according to claim 2, characterized in that, The first switching power supply further includes a first diode, the positive terminal of the secondary side of the first transformer is connected to the positive terminal of the first diode, and the negative terminal of the first diode is connected to the negative terminal of the secondary side of the first transformer through the capacitor assembly of the first switching power supply.

4. The air conditioning system according to claim 3, characterized in that, The auxiliary wake-up branch includes a unidirectional conducting element and a voltage divider resistor. The positive end of the unidirectional conducting element is connected to the S-line of the current loop communication circuit, the negative end of the unidirectional conducting element is connected to one end of the voltage divider resistor, and the other end of the voltage divider resistor is connected to the negative terminal of the first diode.

5. The air conditioning system according to claim 2, characterized in that, The first switching power supply further includes a voltage conversion circuit. The connection point between the capacitor assembly of the first switching power supply and the secondary side of the first transformer is connected to the voltage input terminal of the voltage conversion circuit, and the voltage output terminal of the voltage conversion circuit is connected to the main control chip of the outdoor main control board.

6. The air conditioning system according to claim 1, characterized in that, The current loop communication circuit is connected to the second switching power supply of the indoor main control board via L line and N line on the indoor side. The second switching power supply includes a second rectifier bridge circuit and a second transformer. The second rectifier bridge circuit is connected to the primary side of the second transformer, and the secondary side of the second transformer is connected to the DC power supply.

7. The air conditioning system according to claim 6, characterized in that, The DC power supply includes a clamping capacitor and a second diode. The anode of the second diode is connected to the anode of the secondary side of the second transformer. One end of the clamping capacitor is connected to the cathode of the second diode as the anode of the DC power supply, and the other end of the clamping capacitor is connected to the cathode of the secondary side of the second transformer.

8. The air conditioning system according to claim 1, characterized in that, The current loop communication circuit further includes a first resistor and an indoor data receiving optocoupler. The light-emitting end of the indoor data receiving optocoupler is connected in parallel with the first resistor. The light-emitting end of the indoor data receiving optocoupler is connected to the neutral line (N line) of the current loop communication circuit and the photosensitive end of the indoor data transmitting optocoupler.

9. The air conditioning system according to claim 8, characterized in that, The air conditioning system also includes a charging detection module. The sampling end of the charging detection module is connected to the photosensitive end of the indoor data receiving optocoupler, and the output end of the charging detection module is used to output a charging signal corresponding to the charging current in the charging circuit.

10. The air conditioning system according to claim 8, characterized in that, The air conditioning system also includes a signal amplification and shaping circuit, the input of which is connected to the photosensitive end of the indoor data receiving optocoupler.

11. The air conditioning system according to claim 10, characterized in that, The signal amplification and shaping circuit includes a switching transistor and a second resistor. The first switching pin of the switching transistor is connected to a constant voltage source through the second resistor, the second switching pin of the switching transistor is grounded, the control pin of the switching transistor is connected to the input terminal of the signal amplification and shaping circuit, and the connection point between the first switching pin of the switching transistor and the second resistor is connected to the output terminal of the signal amplification and shaping circuit.

12. A wake-up method, characterized in that, The wake-up method, applied to the indoor main control board of an air conditioning system as described in any one of claims 1 to 11, includes: In response to the outdoor unit wake-up command, the light-emitting end of the indoor data transmission optocoupler is controlled to turn on the photosensitive end of the indoor data transmission optocoupler, so as to form the charging circuit to charge the capacitor component of the first switching power supply. When the charging signal is detected to be lower than a preset value, the light-emitting end of the indoor data transmitting optocoupler is controlled to cut off the photosensitive end of the indoor data transmitting optocoupler. The charging signal is obtained by sampling the charging current in the charging circuit.

13. The wake-up method according to claim 12, characterized in that, The current loop communication circuit further includes a first resistor and an indoor data receiving optocoupler. The light-emitting end of the indoor data receiving optocoupler is connected in parallel with the first resistor. The light-emitting end of the indoor data receiving optocoupler is connected to the neutral line (N line) of the current loop communication circuit and the photosensitive end of the indoor data transmitting optocoupler. The air conditioning system further includes a charging detection module. The sampling end of the charging detection module is connected to the photosensitive end of the indoor data receiving optocoupler. The output end of the charging detection module outputs the charging signal to the indoor main control board.

14. The wake-up method according to claim 12, characterized in that, After controlling the light-emitting end of the indoor data transmitting optocoupler to cut off the photosensitive end of the indoor data transmitting optocoupler, the wake-up method further includes: After a preset delay period, a confirmation command is sent to the outdoor main control board through the current loop communication circuit, and the system waits for a confirmation response command from the outdoor main control board. If no confirmation response is received within the response time threshold, the light-emitting end of the indoor data transmission optocoupler is recontrolled to make the photosensitive end of the indoor data transmission optocoupler conduct.

15. The wake-up method according to claim 14, characterized in that, The wake-up method further includes: If no confirmation response is received within the response time threshold, the number of failures is recorded; When the number of failures reaches a preset number, a fault alert will be issued.

16. A startup method, characterized in that, The outdoor main control board of the air conditioning system as described in any one of claims 1 to 11, the start-up method includes: After being powered on and awakened, the power supply switch is closed.

17. The startup method according to claim 16, characterized in that, After closing the power supply switch, the startup method further includes: The outdoor data receiving optocoupler of the current loop communication circuit is connected and waits to receive the confirmation command sent by the indoor main control board; Upon receiving the confirmation command, an confirmation response command is sent to the indoor main control board via the outdoor data transmission optocoupler of the current loop communication circuit.

18. A controller, characterized in that, It includes at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform a wake-up method or a startup method as described in any one of claims 12 to 17.

19. A main control board, characterized in that, Includes the controller as described in claim 18.

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