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. A current loop communication circuit is arranged between an indoor main control board and an outdoor main control board of the air conditioning system. The air conditioning system further comprises a first switch, a second switch and a clamping circuit, the clamping circuit is connected with an S line and an N line of the current loop communication circuit on the outdoor side, and the clamping voltage output end of the clamping circuit is connected with a capacitor assembly of the first switching power supply. When the first switch is switched on and the second switch is switched off, the L line and the N line of the current loop communication circuit form a loop through the S line of the current loop communication circuit and the clamping circuit, and the clamping voltage output end of the clamping circuit charges the capacitor assembly of the first switching power supply. And the outdoor main control board is started by utilizing the voltage at the two ends of the capacitor assembly of the first switching power supply. In the embodiment of the invention, the auxiliary power supply is formed through the clamping circuit to charge the capacitor assembly of the first switching power supply, so that the space of layout elements on the indoor main control board can be saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioner control, and in particular to an air conditioner system, a wake-up method, a start-up method, a controller and a main control board. BACKGROUND

[0002] A variable frequency split air conditioner comprises an indoor unit and an outdoor unit. The communication mode between the indoor unit and the outdoor unit is mostly current loop communication. This communication mode has the characteristics of strong anti-interference ability and low cost. In order to realize low-power standby, an indoor main control board generally reserves a large-power relay to cut off the power supply of the outdoor unit, so as to reduce the power consumption of the whole machine when the air conditioner needs to be on standby. If the air conditioner needs to cool or heat and the like in the standby state, the indoor main control board will control the large-power relay to be attracted, supply power to the outdoor unit and then wake up the outdoor main control board.

[0003] With the improvement of people's living standards, the air conditioner needs more and more additional functions. Due to the limited building area, the size of the air conditioner cannot be increased. In order to layout more elements in the limited space of the indoor main control board, the elements usually need to be miniaturized. However, the large-power relay bears a large power, and its size and height are large. It is difficult to miniaturize the relay. SUMMARY

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

[0005] In a first aspect, the embodiment of the present application provides an air conditioner system. A current loop communication circuit is arranged between an indoor main control board and an outdoor main control board of the air conditioner system. The current loop communication circuit is connected to an alternating current input end of a first switching power supply of the outdoor main control board through an L line and an N line on the outdoor side. The air conditioner system further comprises:

[0006] A first switch is connected to the L line and an S line of the current loop communication circuit on the indoor side.

[0007] A second switch is arranged between the L line of the current loop communication circuit and the alternating current input end of the first switching power supply on the outdoor side.

[0008] A clamping circuit is connected to the S line and the N line of the current loop communication circuit on the outdoor side. A clamping voltage output end of the clamping circuit is connected to a capacitor assembly of the first switching power supply. In the case that the first switch is closed and the second switch is opened, a loop is formed between the L line and the N line of the current loop communication circuit through the S line of the current loop communication circuit and the clamping circuit. The clamping voltage output end of the clamping circuit charges the capacitor assembly of the first switching power supply, so as to start the outdoor main control board by using the voltage between the capacitor assembly of the first switching power supply.

[0009] In some embodiments, the first switching power supply comprises a first rectifier bridge circuit and a first transformer, the first rectifier bridge circuit is connected to a primary side of the first transformer, a capacitor assembly of the first switching power supply is connected in parallel with a secondary side of the first transformer, a connection point of the capacitor assembly of the first switching power supply and the secondary side of the first transformer is connected to a main control chip of the outdoor main control board, and the primary side and the secondary side of the first transformer are grounded.

[0010] In some embodiments, the first switching power supply further comprises a first diode, a positive electrode of the secondary side of the first transformer is connected to a positive electrode of the first diode, and a negative electrode of the first diode is connected to a negative electrode of the secondary side of the first transformer through the capacitor assembly of the first switching power supply.

[0011] In some embodiments, the clamping circuit comprises a first resistor and a second resistor, a unidirectional conduction element, a clamping capacitor and a voltage stabilizing diode, one end of the first resistor is connected to an S line of the current loop communication circuit, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to a positive electrode of the unidirectional conduction element, a negative electrode of the unidirectional conduction element is connected to a negative electrode output end of the rectifier bridge circuit, the clamping capacitor, the voltage stabilizing diode and the second resistor are connected in parallel, a negative electrode of the voltage stabilizing diode is connected to a connection point of the first resistor and the second resistor, and the connection point of the first resistor and the second resistor is connected to a negative electrode of the first diode to provide a clamping voltage.

[0012] In some embodiments, the first switching power supply further comprises a voltage conversion circuit, a connection point of the capacitor assembly of the first switching power supply and the secondary side of the first transformer is connected to a voltage input end of the voltage conversion circuit, and a voltage output end of the voltage conversion circuit is connected to the main control chip of the outdoor main control board.

[0013] In some embodiments, the first switch is a low-power relay, and the second switch is a high-power relay.

[0014] In a second aspect, embodiments of the present application provide a wake-up method applied to an indoor main control board in the air conditioning system as described in the first aspect, and the wake-up method comprises:

[0015] In response to an outdoor unit wake-up instruction, the first switch is controlled to be closed to form the energy charging loop to charge the capacitor assembly of the first switching power supply;

[0016] When a closing duration of the first switch reaches a preset closing duration, the first switch is controlled to be opened.

[0017] In some embodiments, after the first switch is controlled to be opened, the wake-up method further comprises:

[0018] sending a confirmation instruction to the outdoor master control board through the current loop communication circuit and waiting for a confirmation response instruction sent by the outdoor master control board;

[0019] if the confirmation response instruction is not received within a response duration threshold, re-controlling the first switch to be closed.

[0020] In some embodiments, the wake-up method further comprises:

[0021] in the case where the confirmation response instruction is not received within the response duration threshold, recording a failure number;

[0022] when the failure number reaches a preset number, issuing a fault reminder.

[0023] In a third aspect, embodiments of the present application provide a starting method applied to an outdoor master control board of the air conditioning system as described in the first aspect, and the starting method comprises:

[0024] after power-on wake-up, closing the second switch.

[0025] In some embodiments, after closing the second switch, the wake-up method further comprises:

[0026] turning on an outdoor data receiving optocoupler of the current loop communication circuit and waiting for receiving a confirmation instruction sent by the indoor master control board;

[0027] after receiving the confirmation instruction, sending a confirmation response instruction to the indoor master control board through an outdoor data sending optocoupler of the current loop communication circuit.

[0028] In a fourth aspect, embodiments of the present application provide a controller, comprising at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the wake-up method as described in the second aspect and the starting method as described in the third aspect.

[0029] In a fifth aspect, embodiments of the present application provide a master control board, comprising the controller as described in the fourth aspect.

[0030] In a sixth aspect, embodiments of the present application provide a computer readable storage medium, which stores computer executable instructions for causing a computer to execute the wake-up method as described in the second aspect and the starting method as described in the third aspect.

[0031] The air conditioning system, the wake-up method, the starting method, the controller and the main control board of the embodiment have at least the following beneficial effects: the air conditioning system based on the current loop communication circuit is provided with a first switch on the indoor side, the current loop communication circuit L line and the S line are connected on the indoor side when the first switch is closed, the air conditioning system is provided with a second switch on the outdoor side, the S line of the current loop communication circuit, the clamping circuit and the L line are connected on the outdoor side when the second switch is opened, therefore, when the outdoor main control board needs to be woken up, the first switch is closed and the second switch is opened, a loop from the L line of the current loop communication circuit, the first switch, the S line, the clamping circuit and the N line is formed, at this time, the voltage output by the clamping voltage output end of the clamping circuit is used to charge the capacitor assembly of the first switch power supply, and then the voltage between the capacitor assembly of the first switch power supply is used to provide working voltage for the main control chip of the outdoor main control board, so as to wake up the outdoor unit; after the main power loop from the L line to the N line is formed by controlling the first switch and the second switch, the clamping circuit is used to charge the capacitor assembly of the first switch power supply, because the clamping circuit is connected in series with the first switch to divide the voltage, the power required by the first switch is reduced, the first switch does not need to select a large power relay or other large volume device, therefore, the space for arranging elements on the indoor main control board can be saved, and the cost of the indoor main control board can be lower.

[0032] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the description and the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The circuit diagram of the air conditioning system provided by the embodiment of the present application;

[0034] Figure 2 The schematic diagram of the current flow direction in the wake-up process provided by the embodiment of the present application;

[0035] Figure 3 The schematic diagram of the current flow direction in the communication process provided by the embodiment of the present application;

[0036] Figure 4 The flow chart of the wake-up method provided by the embodiment of the present application;

[0037] Figure 5 The flow chart of the wake-up method provided by another embodiment of the present application;

[0038] Figure 6 The flow chart of the wake-up method provided by another embodiment of the present application;

[0039] Figure 7is a flow chart of the starting method provided by one embodiment of the present application;

[0040] Figure 8 is a flow chart of the starting method provided by another embodiment of the present application;

[0041] Figure 9 is a schematic diagram of the controller provided by one embodiment of the present application. DETAILED DESCRIPTION

[0042] For the purpose of the present application, technical solutions and advantages, the following will be further described in detail in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be sequentially changed or adjusted in a manner obvious to those skilled in the art. Therefore, the order in the specification and drawings is only for clear description of one embodiment, and does not mean that it is the necessary order, unless otherwise stated that a certain order must be followed.

[0043] In the description of the present application, one or more is the meaning of one or more, more than two is the meaning of more than two, greater than, less than, more than, etc. Understand as not including the number, above, below, etc. Understand as including the number. If there is a description of the first, second, only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0044] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and have no technical meaning. Unless otherwise specified, the "connection" and "coupling" in the present application include direct and indirect connection (coupling).

[0045] The variable frequency split air conditioner includes an indoor unit and an outdoor unit. The communication mode between the indoor unit and the outdoor unit is mostly current loop communication, which has the characteristics of strong anti-interference ability and low cost. In order to realize low-power standby, the indoor main control board generally reserves a high-power relay to cut off the power supply of the outdoor unit, so as to reduce the power consumption of the whole machine when the air conditioner needs to be on standby. If the air conditioner needs to cool or heat in standby state, the indoor main control board will control the high-power relay to attract, supply power to the outdoor unit and wake up the outdoor main control board.

[0046] With the improvement of people's living standards, air conditioning needs more and more additional functions. Due to the limited building area, the size of the air conditioner cannot be increased. In order to layout more elements in the limited space of the indoor main control board, the elements usually need to be miniaturized. However, the power that the large power relay bears is large, and the volume and height of the large power relay are large. It is difficult to miniaturize the relay.

[0047] Based on this, the embodiment provides an air conditioning system, a wake-up method, a starting method, a controller and a main control board. The air conditioning system based on the current loop communication circuit is provided with a first switch at the indoor side. The L line and the S line of the current loop communication circuit are connected at the indoor side in the case that the first switch is closed. The air conditioning system is provided with a second switch at the outdoor side. The S line of the current loop communication circuit, the clamping circuit and the L line are connected at the outdoor side in the case that the second switch is opened. Therefore, when the outdoor main control board needs to be woken up, the first switch is controlled to be closed and the second switch is controlled to be opened. A loop from the L line of the current loop communication circuit, the first switch, the S line, the clamping circuit and the N line is formed. At this time, the voltage output by the clamping voltage output end of the clamping circuit is used to charge the capacitor assembly of the first switch power supply. Then, the voltage across the capacitor assembly of the first switch power supply is used to provide working voltage for the main control chip of the outdoor main control board, so as to wake up the outdoor unit. After the main power loop from the L line to the N line is formed by controlling the first switch and the second switch, the clamping circuit is used to charge the capacitor assembly of the first switch power supply. Since the clamping circuit and the first switch are connected in series and are divided in voltage, the power that the first switch needs to bear is reduced. The first switch does not need to select a large power relay and other large volume devices. Therefore, the space for layout of elements on the indoor main control board can be saved, and the cost of the indoor main control board can be lower. The air conditioning system, the wake-up method, the controller and the main control board will be described in detail below with reference to the accompanying drawings:

[0048] Referring to Figure 1 , the circuit diagram of the air conditioning system provided by the embodiment of the present application is shown. Figure 1

[0049] The current loop communication circuit is arranged 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 end of the first switch power supply 110 of the outdoor main control board through the L line and the N line at the outdoor side.

[0050] In some embodiments, the air conditioning system further comprises a first switch RY1 arranged at the indoor side and a second switch RY2 arranged at the outdoor side. The first switch RY1 is connected to the L line and the S line of the current loop communication circuit, so that the current loop communication circuit can be connected or disconnected through the switching state of the first switch RY1. The second switch RY2 is arranged between the L line of the current loop communication circuit and the AC input end of the first switch power supply 110.

[0051] ​It can be understood that the current loop communication circuit in the embodiment includes an L line, an S line and an N line, wherein the L line is a live wire, the N line is a zero line, and the S line is a communication line. Power supply and communication of the indoor main control board and / or the outdoor main control board are realized through cooperation of the first switch RY1, the second switch RY2, the L line, the S line and the N line. In the embodiment, the first switch RY1 and the second switch RY2 can be a relay, a photoelectric switch, a transistor or the like. The selection of the first switch RY1 and the second switch RY2 is not specifically limited in the embodiment.

[0052] Specifically, in the prior art, a high-power relay is generally arranged on the indoor main control board, which occupies too much space of the indoor main control board and may limit the local and design of other functional modules, further limiting the function of the air conditioning system. In the embodiment, the first switch RY1 is a low-power relay, and the second switch RY2 is a high-power relay. That is, the first switch RY1 on the indoor main control board can be a single-pole single-throw low-power small-size relay, a small-size solid-state relay or a high-voltage switch tube, and the second switch RY2 on the outdoor main control board can be a single-pole single-throw relay. Therefore, the space of the indoor main control board can be saved, the space occupied by the first switch RY1 on the indoor main control board can be reduced, the cost of the indoor main control board can be further reduced, and the normal operation of the air conditioning system can be ensured.

[0053] In some embodiments, the clamping circuit 200 is connected to the S line and the N line of the current loop communication circuit on the outdoor side, and the clamping voltage output end of the clamping circuit 200 is connected to the capacitor assembly E3 of the first switching power supply 110. Therefore, the capacitor assembly E3 of the first switching power supply 110 can be charged by the output voltage of the clamping voltage output end, and the capacitor assembly can be prevented from being damaged due to overvoltage, thereby protecting the capacitor assembly and the surrounding circuit from damage.

[0054] In some embodiments, the first switching power supply 110 includes a first rectifier bridge circuit and a first transformer TR1. The first rectifier bridge circuit is connected to the primary side of the first transformer TR1, and the first rectifier bridge circuit is also connected to the clamping circuit 200. Therefore, the first rectifier bridge circuit can receive the voltage output by the clamping circuit 200 and convert the alternating current signal into a direct current signal, so that the power supply output is more stable. The capacitor assembly E3 of the first switching power supply 110 is connected in parallel with the secondary side of the first transformer TR1, so that the capacitor assembly can sense the voltage output of the primary side of the first transformer TR1. The connection point of the capacitor assembly E3 of the first switching power supply 110 and the secondary side of the first transformer TR1 is connected to the main control chip 500 of the outdoor main control board. The primary side and the secondary side of the first transformer TR1 are common ground. Power supply of the main control chip 500 of the outdoor main control board is realized through cooperation of the first rectifier bridge circuit, the first transformer TR1 and the capacitor assembly, so that the main control chip can be provided with stable voltage.

[0055] It can be understood that the first rectifier bridge circuit of the embodiment is connected with the clamping circuit 200 and the primary side of the first transformer TR1, so that the current can flow through the first rectifier bridge circuit, at this time the primary side of the first transformer TR1 is applied with a voltage, and the voltage applied through the primary side changes, so that different voltage outputs can be induced on the secondary side. Finally, the capacitor components on the secondary side realize stable power supply for the master control chip.

[0056] It should be noted that the first rectifier bridge circuit includes a first bridge arm and a second bridge arm, and a diode connected in each bridge arm is arranged, and the input end of the first bridge arm in the first rectifier bridge circuit is connected with the N line, and the second switch RY2 is connected between the L line and the second bridge arm.

[0057] Specifically, the first bridge arm includes the third diode D3 and the eighth diode D8, the anode of the third diode D3 is connected with the cathode of the eighth diode D8, the second bridge arm includes the fourth diode D4 and the ninth diode D9, the anode of the fifth diode D7 is connected with the cathode of the ninth diode D9, and the input end of the first bridge arm is between the third diode D3 and the eighth diode D8, and the input end of the second bridge arm is between the fifth diode D7 and the ninth diode D9.

[0058] The current flow directions in different closing conditions of the first switch RY1 and the second switch RY2 are specifically described below.

[0059] Referring to Figure 2 , a schematic diagram of the current flow direction in the wake-up process provided by the embodiment of the application is shown. Figure 2

[0060] It can be understood that the solid arrows in Figure 2 point to the current flow direction.

[0061] In some embodiments, when the air conditioning system is just powered on, the first switch RY1 of the indoor master control board and the second switch RY2 of the outdoor master control board are in an open state, at this time the L line and the N line do not form a loop, the master control chip 500 of the outdoor master control board is in a power-off state, only the indoor master control board has power, and the indoor master control board enters a standby state without user operation, so that low-power standby of the whole machine can be realized in this state.

[0062] Specifically, in the case that the first switch RY1 and the second switch RY2 are both open, the L line and the N line of the current loop communication circuit cannot form a loop, although the indoor master control board has power, the outdoor master control board has no power supply source because the L line and the N line do not form a loop, at this time the outdoor unit is in a standby state, so that low-power standby of the air conditioning system can be realized.

[0063] ​In the case that the first switch RY1 is closed and the second switch RY2 is open, a loop is formed between the L line and the N line of the current loop communication circuit through the S line of the current loop communication circuit and the clamping circuit 200, at this time, the current flows out from the L line, sequentially flows through the S line, the clamping circuit 200 and the first bridge arm in the first rectifier bridge circuit, and finally flows into the N line, specifically, the route of the current is L line-S line-clamping circuit 200-eighth diode D8 in the first bridge arm-N line. Since the current flows into the first switch power supply 110 through the clamping circuit 200, the voltage output end of the clamping circuit 200 can output voltage to the first switch power supply 110, so that the voltage output by the clamping voltage output end of the clamping circuit 200 can charge the capacitor assembly E3 of the first switch power supply 110, so as to start the outdoor master control board by the voltage across the capacitor assembly E3 of the first switch power supply 110, thereby realizing stable power supply to the outdoor master control board, and further awakening the master control chip 500 of the outdoor master control board.

[0064] In some embodiments, the first switch power supply 110 further comprises a first diode D5, the positive electrode of the secondary side of the first transformer TR1 is connected to the positive electrode of the first diode D5, and the negative electrode of the first diode D5 is connected to the negative electrode of the secondary side of the first transformer TR1 through the capacitor assembly E3 of the first switch power supply 110, thereby limiting the unidirectional conduction of the current, preventing the reverse current from flowing into the first transformer TR1, realizing the protection of the first transformer TR1, and avoiding the damage of the elements.

[0065] It should be noted that the clamping circuit 200 in the present embodiment supplies power to the low-voltage part of the secondary side of the first transformer TR1 in the outdoor master control board to realize awakening, and the clamping circuit 200 can reduce the power consumption of the first switch power supply 110, thereby improving the energy consumption of the air conditioning system.

[0066] In some embodiments, the clamping circuit 200 comprises a first resistor R1 and a second resistor R2, a unidirectional conduction element D2, a clamping capacitor E1 and a voltage stabilizing diode DZ1, one end of the first resistor R1 is connected to the S line of the current loop communication circuit, the other end of the first resistor R1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to the positive electrode of the unidirectional conduction element D2, the first resistor R1 and the second resistor R2 are cooperated to divide voltage, thereby realizing the voltage reduction of the output clamping circuit 200, the negative electrode of the unidirectional conduction element D2 is connected to the negative electrode output end of the rectifier bridge circuit, the clamping capacitor E1, the voltage stabilizing diode DZ1 and the second resistor R2 are connected in parallel, and the negative electrode of the voltage stabilizing diode DZ1 is connected to the connection point of the first resistor R1 and the second resistor R2, thereby being capable of stabilizing the voltage after voltage reduction, and the connection point of the first resistor R1 and the second resistor R2 is connected to the negative electrode of the first diode D5 to provide the clamping voltage, thereby being capable of stably providing the clamping voltage.

[0067] Specifically, in the embodiment of the present application, the input voltage is reduced to the required voltage level by the first resistor R1 and the second resistor R2 through the voltage division, and different output voltages can be achieved by adjusting the resistance ratio of the two resistors. The positive electrode of the unidirectional conducting element D2 is connected to the connection point of the second resistor R2, which plays a role of preventing the current from flowing in the reverse direction and determines the clamping direction, thereby preventing the current from flowing back to the clamping circuit 200. The clamping capacitor E1 is connected in parallel with the second resistor R2 and the zener diode DZ1, thereby being able to provide a stable output voltage, wherein the clamping capacitor E1 acts as a storage device and is able to provide or absorb charges when the output voltage changes instantaneously, so as to maintain the stability of the output voltage. The negative electrode of the zener diode DZ1 is connected to the connection point of the first resistor R1 and the second resistor R2, thereby being able to provide a fixed clamping voltage and ensuring that the output voltage is stable within a certain range. The stability of the clamping voltage is achieved through the cooperation of the various elements in the clamping circuit 200.

[0068] It can be understood that the output voltage of the clamping circuit 200 can be higher than the required voltage of the first switching power supply 110, in which case the output voltage of the clamping circuit 200 is reduced through the cooperation of the first resistor R1 and the second resistor R2 to meet the operating voltage requirement of the main circuit. In the embodiment, the resistance values of the first resistor R1 and the second resistor R2 can be set by the user according to the requirements, and the unidirectional conducting element D2 can be a photodiode, a light-emitting diode, or the like, and the embodiment does not make specific limitations.

[0069] It is worth noting that the embodiment can output a stable voltage through the cooperation of the various elements in the clamping circuit 200, and the voltage output by the clamping voltage output end of the clamping circuit 200 is used to charge the capacitor assembly E3 of the first switching power supply 110, and then the voltage across the capacitor assembly E3 of the first switching power supply 110 is used to provide operating voltage for the main control chip 500 of the outdoor main control board, thereby awakening the outdoor unit. After the main power loop from the L line to the N line is formed by controlling the first switch RY1 and the second switch RY2, the clamping circuit 200 forms a sub-power supply to charge the capacitor assembly E3 of the first switching power supply 110. Since the clamping circuit 200 is connected in series with the first switch RY1 for voltage division, the power required to be borne by the first switch RY1 is reduced, and the first switch RY1 does not need to use a large-power relay or other large-size device, thereby saving the space for layout of elements on the indoor main control board and making the cost of the indoor main control board lower.

[0070] The current flow will be described in detail below in combination with the specific devices of the clamping circuit 200 and the states of the first switch RY1 and the second switch RY2.

[0071] In the case that the first switch RY1 and the second switch RY2 are both closed, the case does not affect the whole current operation, because the unidirectional conducting element D2 plays a protective role to prevent the current from flowing reversely into the clamping circuit 200 to burn the voltage stabilizing diode DZ1. Specifically, in the positive half cycle of the alternating current, the current forms a loop between the L line and the N line of the current loop communication circuit through the S line of the current loop communication circuit and the clamping circuit 200, at this time, the current flows out from the L line, sequentially flows through the S line, the clamping circuit 200 and the first switch power supply 110, and finally flows into the N line. Since the current flows into the first switch power supply 110 through the clamping circuit 200, the voltage output end of the clamping circuit 200 can output voltage to the first switch power supply 110, so that the voltage output by the voltage output end of the clamping circuit 200 can charge the capacitor assembly E3 of the first switch power supply 110; in the negative half cycle of the alternating current, the current flows out from the N line, flows through the first switch power supply 110, and then flows to the clamping circuit 200. However, since the negative electrode of the unidirectional conducting element D2 in the clamping circuit 200 is connected to the negative output end of the rectifier bridge circuit, the current cannot flow reversely through the unidirectional conducting element D2, so as to ensure that the current flows in the same direction and prevent the current from flowing reversely into the clamping circuit 200 to burn the voltage stabilizing diode DZ1.

[0072] In some embodiments, the air conditioning system further comprises an indoor data receiving optocoupler IC3 and an indoor data sending optocoupler IC1 arranged on the indoor side, and an outdoor data receiving optocoupler IC2 and an outdoor data sending optocoupler IC4 arranged on the outdoor side. The indoor main control board receives data through the indoor data receiving optocoupler IC3 and sends data through the indoor data sending optocoupler IC1. Similarly, the outdoor main control board receives data through the outdoor data receiving optocoupler IC2 and sends data through the outdoor data sending optocoupler IC4.

[0073] Specifically, one end of the photosensitive assembly of the indoor data sending optocoupler IC1 is connected to the N line, and the other end is connected to the negative electrode of the light-emitting diode in the indoor data receiving optocoupler IC3. The positive electrode of the light-emitting diode in the indoor data receiving optocoupler IC3 is connected to the S line. The positive electrode of the light-emitting diode in the outdoor data receiving optocoupler IC2 is connected to the N line, and the negative electrode is connected to the photosensitive assembly in the outdoor data sending optocoupler IC4. The indoor main control board and the outdoor main control board in the embodiment are respectively provided with optocoupler assemblies, so as to determine the connection and communication conditions of the indoor main control board and the outdoor main control board. The optocoupler transmission is not affected by electromagnetic interference, which improves the anti-interference ability of the communication system and further improves the stability and safety of the air conditioning system.

[0074] In some embodiments, in the process of communication between the indoor master control board and the outdoor master control board, after the outdoor master control board is woken up, the outdoor master control board will attract the outdoor data receiving optocoupler IC2 and the outdoor data sending optocoupler IC4, and wait for receiving the command sent by the indoor master control board. At this time, the indoor master control board attracts the indoor data sending optocoupler IC1 and the indoor data receiving optocoupler IC3, sends the command through the indoor data sending optocoupler IC1, the outdoor master control board receives the command sent by the indoor master control board through the outdoor data receiving optocoupler IC2, and returns the corresponding response command through the outdoor data sending optocoupler IC4, and the indoor master control board receives the response command sent by the outdoor master control board through the indoor receiving optocoupler, so as to determine the wake-up situation or working situation of the outdoor master control board through the change of the optocoupler, realize the detection of the working state of the outdoor master control board, and the current flow direction in the communication process is as shown below.

[0075] Referring to Figure 3 , the solid arrow in the communication process of the embodiment of the present application provides a schematic diagram of the current flow direction. Figure 3

[0076] It can be understood that the solid arrow in the communication process of the embodiment of the present application provides a schematic diagram of the current flow direction. Figure 3

[0077] After the outdoor master control board has been woken up, in the case that the first switch RY1 is disconnected and the second switch RY2 is closed, the current will flow out from the power supply at one end of the capacitor assembly, flow to the clamping circuit 200, and because there is a pressure difference between the one-way conduction element D2 in the clamping circuit 200 and the outdoor master control board, the voltage stabilizing diode DZ1 in the clamping circuit 200 will not be reversely broken down at this time, the current will flow through the first resistor R1, the S line, the indoor data receiving optocoupler IC3 and the indoor data sending optocoupler IC1 in turn, and finally flow into the N line, and then return to the 0-volt potential point through the outdoor data receiving optocoupler IC2 and the outdoor data sending optocoupler IC4, to complete the current flow of the whole communication process, that is, the current flow path in the communication process is: the power supply at one end of the capacitor assembly-clamping circuit 200-S line-indoor data receiving optocoupler IC3-indoor data sending optocoupler IC1-N line-outdoor data receiving optocoupler IC2-outdoor data sending optocoupler IC4-0-volt potential point.

[0078] ​​In some embodiments, the first switching power supply 110 further comprises a voltage conversion circuit 300, the capacitor component E3 of the first switching power supply 110 is connected with the connection point of the secondary side of the first transformer TR1 to connect the voltage input end of the voltage conversion circuit 300, so as to adjust the voltage level of the secondary side output voltage of the first transformer TR1, realize voltage conversion of the secondary side of the first transformer TR1, and ensure the load-specific demand of the output voltage, the voltage output end of the voltage conversion circuit 300 is connected with the main control chip 500 of the outdoor main control board, so as to realize stable power supply for the main control chip 500 of the outdoor main control board and meet the power supply demand of the main control chip 500 of the outdoor main control board.

[0079] In some embodiments, the current loop communication circuit is connected with the AC input end of the second switching power supply 120 of the indoor main control board through the L line and the N line on the indoor side, the second switching power supply 120 comprises a second rectifier bridge circuit and a second transformer TR2, one end of the capacitor component E2 of the second switching power supply 120 is connected with the positive output end of the second rectifier bridge circuit, the other end of the capacitor component E2 of the second switching power supply 120 is connected with the negative output end of the second rectifier bridge circuit, and the capacitor component E2 of the second switching power supply 120 is connected with the primary side of the second transformer TR2, the secondary side of the second transformer TR2 is connected with the main control chip of the indoor main control board, so as to convert the AC signal into a DC signal through the second rectifier bridge circuit, the capacitor component E2 of the second switching power supply 120 is connected with the positive output end and the negative output end of the second rectifier bridge circuit, so as to smooth the fluctuation of the output voltage, and the primary side of the second transformer TR2 is connected with the capacitor component to determine the voltage across the capacitor component, so that the secondary side of the second transformer TR2 can induce different voltage outputs according to the voltage change of the primary side, thereby realizing stable power supply for the main control chip of the indoor main control board.

[0080] Specifically, the second rectifier bridge circuit comprises a third bridge arm and a fourth bridge arm, and a diode connected in series is arranged on each bridge arm, and the input end of the third bridge arm in the second rectifier bridge circuit is connected with the N line, and the fourth bridge arm is connected with the L line. The third bridge arm comprises a sixth diode D6 and a twelfth diode D10, the anode of the sixth diode D6 is connected with the cathode of the twelfth diode D10, the fourth bridge arm comprises a seventh diode D7 and an eleventh diode D11, the anode of the seventh diode D7 is connected with the cathode of the eleventh diode D11, and the input end of the third bridge arm is between the sixth diode D6 and the twelfth diode D10, and the input end of the fourth bridge arm is between the seventh diode D7 and the eleventh diode D11.

[0081] In some embodiments, the phase difference between the current and the voltage is large in most cases. Low power factor will cause the power grid load to increase, reduce the utilization of electric energy, and increase energy waste. Therefore, the first switching power supply 110 in the embodiment further includes an inductor L3, a first power tube Q1, and a capacitor E5. The first rectifier bridge circuit, the inductor L3, the capacitor E5, and the first power tube Q1 form a PFC (Power Factor Correction Circuit) circuit 400, so as to adjust the phase relationship between the current and the voltage to be as close to in-phase as possible, thereby improving the power factor, reducing the loss of invalid power, and further improving the stability and reliability of the output voltage.

[0082] Specifically, one end of the inductor L3 in the embodiment is connected to the positive output end of the first rectifier bridge circuit, and the other end is connected to the primary side of the first transformer TR1. The first power tube Q1 in the embodiment can be a triode or a MOS tube. Taking the case where the first power tube Q1 is a MOS tube as an example, the drain of the first power tube Q1 is connected between the inductor L3 and the primary side of the first transformer TR1, the source is connected between the negative output end of the first rectifier bridge circuit and the primary side of the first transformer TR1, and the capacitor E5 is connected in parallel with the inductor L3, that is, one end of the capacitor E5 is connected between the inductor L3 and the primary side of the first transformer TR1, and the other end is connected between the negative output end of the first rectifier bridge circuit and the primary side of the first transformer TR1.

[0083] In some embodiments, the second switching power supply further includes a second power tube Q2. The first switching pin of the second power tube Q2 is connected to the primary side of the second transformer TR2, and the second switching pin is connected to the negative output end of the second rectifier bridge circuit. Similarly, the second power tube Q2 in the embodiment can be a triode or a MOS tube. The selection of the first power tube Q1 and the second power tube Q2 is not specifically limited in the embodiment.

[0084] In some embodiments, the first switch RY1 of the embodiment of the application is connected to the L line and the S line of the current loop communication circuit. The second switch RY2 is arranged between the L line and the input end of the second bridge arm in the first rectifier bridge circuit. In the case where the first switch RY1 is closed and the second switch RY2 is opened, a loop is formed between the L line and the N line of the current loop communication circuit through the S line of the current loop communication circuit and the clamping circuit 200. In the positive half cycle of the alternating current, the current flows out from the L line, sequentially passes through the first switch RY1, the S line, the clamping circuit 200, the first switching power supply 110, and finally flows into the N line, forming a loop of L line-first switch RY1-S line-clamping circuit 200-eighth diode D8 in the first bridge arm-N line.

[0085] The first switch RY1 can also be arranged between the N line and the S line, that is, the N line and the S line of the current loop communication circuit are connected through the first switch RY1, and the second switch RY2 is arranged between the N line and the input end of the first bridge arm in the first rectifier bridge circuit. In the case that the first switch RY1 is closed and the second switch RY2 is opened, the L line and the N line of the current loop communication circuit can also form a loop through the S line and the clamping circuit 200. Specifically, in the negative half cycle of the alternating current, the current flows out from the N line. At this time, since the first switch RY1 is closed, the current can directly flow into the S line through the first switch RY1, and then flow into the clamping circuit 200. At this time, the voltage output through the clamping voltage output end of the clamping circuit 200 charges the capacitor assembly E3 of the first switching power supply 110. Then, the current flows into the second bridge arm of the first rectifier bridge circuit, and finally flows into the L line, thereby forming a loop of the N line-the first switch RY1-the S line-the clamping circuit 200-the ninth diode D9 in the second bridge arm-the L line. The auxiliary power supply formed through the clamping circuit 200 can charge the capacitor assembly E3 of the first switching power supply 110, and then the voltage across the capacitor assembly E3 of the first switching power supply 110 provides a working voltage for the main control chip 500 of the outdoor main control board, thereby awakening the outdoor unit.

[0086] It can be understood that the awakening of the outdoor unit can be realized through the above two ways. The circuit arrangement of the air conditioning system is not specifically limited in the embodiment.

[0087] It can be understood by those skilled in the art that Figures 1-3 The schematic diagram shown in the figure is not a limitation of the embodiment of the application, and can include more or fewer components than the schematic diagram, or combine certain components, or different component arrangements. The awakening method in the embodiment will be specifically described below.

[0088] Referring to Figure 4 , Figure 4 is a flowchart of the awakening method provided by an embodiment of the application. The application is applied to, but is not limited to Figure 1 the indoor main control board of the air conditioning system in the figure. The application includes, but is not limited to, steps S101 to S102.

[0089] In step S101, in response to an outdoor unit awakening instruction, the first switch RY1 is controlled to be closed to form a charging loop to charge the capacitor assembly E3 of the first switching power supply 110.

[0090] In some embodiments, when the air conditioning system is powered on, the first switch RY1 and the second switch RY2 in the air conditioning system are in an open state, in response to an outdoor unit wake-up instruction, the first switch RY1 is controlled to be closed, at this time, a loop is formed between the L line and the N line of the current loop communication circuit through the S line of the current loop communication circuit and the clamping circuit 200, that is, a charging loop from the L line of the current loop communication circuit-the first switch RY1-the S line-the clamping circuit 200-the N line can be formed, the voltage output by the clamping voltage output end of the clamping circuit 200 can be used to charge the capacitor assembly E3 of the first switch power supply 110, and then the voltage across the capacitor assembly E3 of the first switch power supply 110 is used to provide operating voltage for the main control chip 500 of the outdoor main control board, so as to wake up the outdoor unit.

[0091] It should be noted that when the air conditioning system is powered on, the first switch RY1 and the second switch RY2 are both in an open state, so after responding to the outdoor unit wake-up instruction, only the first switch RY1 needs to be controlled to be closed, and the second switch RY2 remains in an open state.

[0092] Step S102, determine whether the closing duration of the first switch RY1 reaches a preset closing duration, and control the first switch RY1 to be opened.

[0093] In some embodiments, during the process of charging the capacitor assembly E3 of the first switch power supply 110, the clamping circuit 200 charges the low-voltage part of the first switch power supply 110, so that the main control chip 500 of the outdoor main control board is electrified and controls the second switch RY2 to be closed. At this time, if the indoor main control board needs to communicate with the outdoor main control board, the first switch RY1 needs to be opened. In order not to affect the communication function between the indoor main control board and the outdoor main control board, the present embodiment needs to calculate the closing duration of the first switch RY1 after controlling the first switch RY1 to be closed, and then determine whether the closing duration of the first switch RY1 reaches a preset closing duration. When it is determined that the closing duration of the first switch RY1 reaches the preset closing duration, the first switch RY1 is controlled to be opened, so as to avoid affecting the communication function between the indoor main control board and the outdoor main control board.

[0094] It should be noted that the preset closing duration in the present embodiment can be set by the user according to the user's needs, for example, 1 second, 2 seconds, 3 seconds, etc., and the present embodiment does not make specific limitations.

[0095] Referring to Figure 5 , the present embodiment provides a flowchart of a wake-up method. It includes but is not limited to steps S201 to S202. Figure 5

[0096] It should be noted that steps S201 to S202 occur after the first switch RY1 is controlled to be opened.

[0097] ​Step S201, send a confirmation instruction to the outdoor master control board through the current loop communication circuit and wait for the confirmation response instruction sent by the outdoor master control board.

[0098] Step S202, if the confirmation response instruction is not received within the response time threshold, re-control the first switch RY1 to be closed.

[0099] In steps S201 to S202 of some embodiments, due to the large number of additional functions of the air conditioning system, the outdoor unit may fail to wake up or the air conditioner may function abnormally. After the first switch RY1 is controlled to be open in the embodiment, a confirmation instruction is sent to the outdoor master control board through the current loop communication circuit to determine whether the function of the outdoor master control board is normal or whether the outdoor master control board is powered on, and the like, and the confirmation response instruction sent by the outdoor master control board is waited for. If the confirmation response instruction is not received within the response time threshold, the first switch RY1 is re-controlled to be closed, i.e., step S101 is repeated, so as to realize detection of the outdoor master control board, ensure that the air conditioning system can operate normally, and improve the stability and reliability of the air conditioning system.

[0100] In some embodiments, if the confirmation response instruction is received within the response time threshold, the wake-up process is ended.

[0101] It can be understood that the response time threshold in the embodiment can be set by the user as needed, such as 500 milliseconds, 300 milliseconds, 550 milliseconds, etc., and the embodiment does not make specific limitations.

[0102] Referring to Figure 6 , Fig. 3 is a flowchart of a wake-up method provided by another embodiment of the present application. It includes but is not limited to steps S301 to S302. Figure 6

[0103] Step S301, in the case where the confirmation response instruction is not received within the response time threshold, record the number of failures.

[0104] Step S302, when the number of failures reaches a preset number, issue a fault reminder.

[0105] In steps S301 to S302 of some embodiments, after sending the confirmation instruction to the outdoor master control board through the current loop communication circuit, if the confirmation response instruction is not received within the response time threshold, the number of failures needs to be recorded, and the confirmation instruction is continued to be sent to the outdoor master control board through the current loop communication circuit. In the case where the confirmation response instruction is not received, the number of failures is updated, and the number of failures is compared with the preset number. When the number of failures reaches the preset number, a fault reminder needs to be issued, so that the staff can timely discover and handle the fault or abnormality of the outdoor master control board, reduce the downtime and maintenance cost of the air conditioning system, and improve the maintainability and maintenance efficiency of the air conditioning system. ​

[0106] It should be noted that when the number of failures does not reach the preset number, it is necessary to continue to send the confirmation instruction to the outdoor master control panel through the current loop communication circuit, wherein the preset number can be set by the user according to the user's needs, for example, three times, four times, five times, etc., and the embodiment does not make specific limitations.

[0107] Referring to Figure 7 , the flowchart of the starting method provided by an embodiment of the present application is shown. Figure 7 The outdoor master control panel of the air conditioning system in Figure 1 , but not limited to step S401.

[0108] Step S401, close the second switch RY2 after power-on wake-up.

[0109] In some embodiments, the indoor master control panel controls the first switch RY1 to be closed in response to the outdoor machine wake-up instruction of the outdoor master control panel, so as to form a charging circuit to charge the capacitor assembly E3 of the first switch power supply 110, and the outdoor master control panel closes the second switch RY2 after determining power-on wake-up, thereby completing the entire wake-up process.

[0110] Referring to Figure 8 , the flowchart of the starting method provided by another embodiment of the present application is shown. Figure 8 , including but not limited to steps S501 to S502.

[0111] It should be noted that steps S501 to S502 occur after the second switch RY2 is closed.

[0112] Step S501, turn on the outdoor data receiving optocoupler IC2 of the current loop communication circuit, and wait to receive the confirmation instruction sent by the indoor master control panel.

[0113] Step S502, after receiving the confirmation instruction, send a confirmation response instruction to the indoor master control panel through the outdoor data sending optocoupler IC4 of the current loop communication circuit.

[0114] In steps S501 to S502 of some embodiments, after the second switch RY2 is closed, the outdoor master control panel will attract the outdoor data receiving optocoupler IC2 and the outdoor sending optocoupler, that is, turn on the outdoor data receiving optocoupler IC2 and the outdoor data sending optocoupler IC4 of the current loop communication circuit, and wait to receive the command sent by the indoor master control panel, at this time, the current flows as shown in Figure 3 After receiving the confirmation instruction, the outdoor data sending optocoupler IC4 of the current loop communication circuit in the embodiment sends a confirmation response instruction to the indoor master control panel, so as to return the response instruction to the indoor master control panel, thereby realizing the communication process between the indoor master control panel and the outdoor master control panel, ensuring that the air conditioning system can operate normally, and improving the stability and reliability of the air conditioning system.

[0115] In order to more clearly and explicitly explain the air conditioning system, the wake-up method, the start-up method, the controller and the main control board, the following specific examples are described.

[0116] Example one:

[0117] Example one is a specific description of the wake-up method of the air conditioning system, and the following is a detailed description of the wake-up method based on the structure of the air conditioning system in Figure 1

[0118] In some embodiments, a current loop communication circuit is provided between the indoor main control board and the outdoor main control board of the air conditioning system, and the current loop communication circuit is connected to the AC input end of the first switching power supply 110 of the outdoor main control board through L line and N line on the outdoor side.

[0119] Specifically, the indoor data receiving optocoupler IC3, the indoor data sending optocoupler IC1, the outdoor data receiving optocoupler IC2 and the outdoor data sending optocoupler IC4 in the present embodiment form a communication loop, and the power supply of the communication loop comes from the switching power supply of the outdoor main control board. Since the power supply is generated on the switching power supply of the outdoor main control board, the cost is low, which is conducive to the miniaturization design of the indoor electronic control board.

[0120] In the present embodiment, the indoor main control board and the outdoor main control board are connected by three wires, namely L line, N line and S line, which are L1, N1 and S1 terminal connections at the indoor main control board, and L2, N2 and S2 terminal connections at the indoor main control board.

[0121] It is worth noting that the present embodiment takes the first switch RY1 and the second switch RY2 as examples, both of which are relays. The relay used in the indoor main control board is a single-pole single-throw low-power small-size relay, a small-size solid-state relay or a high-voltage switch tube, which can reduce the space of the indoor main control board and reduce the cost. The relay used in the outdoor main control board is a single-pole single-throw relay, which can further reduce the cost.

[0122] It can be understood that the clamping circuit 200 is introduced into the outdoor main control board, and the generation of the clamping circuit 200 only needs a few components, which has extremely low cost and occupies small area on the board, which is conducive to the miniaturization of the electronic control. The indoor main control board only needs a single-pole single-throw or a small-size switch unit, and the outdoor main control board only needs a main relay or a switch unit, which can simplify the hardware design of the outdoor main control board, reduce the action of disconnecting the channel on the software, reduce the cost and improve the reliability.

[0123] In combination with the above description of the structure of the air conditioning system, the wake-up process of the air conditioning system is described in detail.

[0124] ​When the power is first applied, the second switch RY2 on the outdoor main control board is open, and L2 and N2 do not form a circuit. Therefore, the outdoor main control board is not powered, and only the indoor main control board is powered. Moreover, the indoor main control board enters standby mode when there is no user operation, so low power standby can be achieved in this state.

[0125] When the indoor main control board needs to communicate with the outdoor main control board, the indoor main control board activates the first switch RY1. At this time, the current flow direction is as follows: Figure 2 As shown, current flows from L1, through the activated wake-up switch RY1, through S1, into S2, and into clamping circuit 200. Clamping circuit 200 consists of a voltage divider formed by current-limiting resistors R1 and R2. After partially stepping down the 220V voltage, it is regulated to 24V by Zener diode DZ1. The current then flows through unidirectional conductor D2 into the eighth diode D8 in the first rectifier bridge circuit, then into N2, and finally into N1, forming the current loop of clamping circuit 200. Clamping circuit 200 then charges the low-voltage portion of the outdoor unit's main power supply, energizing the main control chip 500 on the outdoor main control board, which in turn activates the second switch RY2, completing the entire wake-up function.

[0126] When the second switch RY2 is engaged, the first switch RY1 is also engaged. This does not affect the overall current operation because the unidirectional conductive element D2 provides protection, preventing reverse current flow into the clamping circuit 200 and damaging the Zener diode DZ1. When the first switch RY1 is engaged for approximately one second, the indoor main controller will actively disconnect the first switch RY1 relay to avoid affecting subsequent communication.

[0127] After the first switch RY1 is turned off, the indoor main controller will send a command to the outdoor main controller board through the current loop to confirm whether the outdoor main controller board is powered on and whether its functions are normal. If an ACK confirmation is received from the outdoor main controller board within 500ms, the entire wake-up function will end.

[0128] If no ACK confirmation is received from the outdoor main control board, repeat steps S1-S3 three times. If the indoor main control board does not receive an ACK after three attempts, an alarm will be triggered.

[0129] In some embodiments, during the wake-up process of this embodiment, the clamping voltage output by the clamping circuit 200 supplies power to the secondary low-voltage part of the first switching power supply 110 to achieve wake-up. Furthermore, during the communication between the indoor main control board and the outdoor main control board, the current of the first switching power supply 110 passes through a portion of the clamping circuit 200. The clamping circuit 200 consumes very little power from the first switching power supply 110, thereby improving system energy efficiency.

[0130] In some embodiments, when the user powers off, the indoor master control board sends a command to the outdoor master control board, and the outdoor master control board, after receiving the command, cuts off the RY1 relay to achieve power-off.

[0131] Example two:

[0132] Example two is a specific description of the communication process of the indoor master control board and the outdoor master control board. Based on the structure of the air conditioning system in Figure 1 , the communication process is described in detail.

[0133] In some embodiments, after the outdoor master control board wakes up, it will send outdoor data to the light coupling IC4 to attract and wait to receive the command of the indoor master control. At this time, the indoor master control sends a command to make the current flowing process of the indoor data receiving light coupling IC3 connected. As described in Figure 3 , the current flows out from 24V in the main power supply, passes through the clamping circuit 200, and because the clamping circuit 200 has a voltage difference (0.7V) of the one-way conducting element D2 to the 0V potential of the outdoor master control board, the stable voltage diode DZ1 of the clamping circuit 200 will not be reversely broken.

[0134] It can be understood that the second resistor R2 in the embodiment is generally a resistance of more than 1,000 ohms, so it consumes little power of the main power supply. After the current flows through the clamping circuit 200, it flows into S2 through the first resistor R1, then to S1, and then flows through the diode between the S1 terminal and the indoor data receiving light coupling IC3, the indoor data receiving light coupling IC3, the indoor data sending light coupling IC1, then flows into N2 through N1, and finally flows through the outdoor data receiving light coupling IC2 and the outdoor data sending light coupling IC4, and returns to the 0V potential point. The current flow of the entire communication process is completed.

[0135] As shown in Figure 9 , the Figure 9 is a schematic diagram of the controller 1000 provided by an embodiment of the present application.

[0136] The embodiment of the present application also provides a controller 1000, which comprises at least one processor and a memory connected with the at least one processor in communication; the memory stores instructions capable of being executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the wake-up method or the start-up method of the above-described embodiments.

[0137] The controller 1000 of the embodiment of the present application comprises one or more processors 1001 and a memory 1002, Figure 9 , taking one processor 1001 and one memory 1002 as an example.

[0138] The processor 1001 and the memory 1002 can be connected through a bus or other means, Figure 9The bus connection is taken as an example.

[0139] The memory 1002, as a kind of non-transient computer readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs.In addition, the memory 1002 can include high-speed random access memory, and can also include non-transient memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transient solid-state memory device.In some embodiments, the memory 1002 can optionally include a memory 1002 that is remotely arranged relative to the processor 1001, and these remote memories can be connected to the controller 1000 through a network.The examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0140] In some embodiments, the present embodiment also provides a master control board, which includes the controller as described above Figure 9 The controller 1000 is used to execute the foregoing wake-up method or start-up method.

[0141] It is worth noting that, since the master control board of the present embodiment includes the controller of the above-mentioned embodiments, the specific implementation and technical effects of the master control board of the present embodiment can refer to the specific implementation and technical effects of the wake-up method or start-up method of any one of the above-mentioned embodiments, which will not be described here again.

[0142] Those skilled in the art can understand that all or some steps of the method disclosed above can be implemented as software, firmware, hardware and appropriate combinations thereof.Several physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a 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 transitory media).As known by 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.Volatile and non-volatile computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer.In addition, as known by those skilled in the art, communication media generally includes computer readable instructions, data structures, program modules or other data in modulated data signals such as carriers or other transmission mechanisms, and can include any information delivery medium.In addition, as known by those skilled in the art, communication media generally includes computer readable instructions, data structures, program modules or other data in modulated data signals such as carriers or other transmission mechanisms, and can include any information delivery medium.

[0143] The above describes the preferred embodiments of the present application, but the present application is not limited to the above-described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. An air conditioning system, characterized by, The current loop communication circuit is connected to the AC input end of the first switching power supply of the outdoor main control board through L line and N line on the outdoor side. The first switch is connected to the L line and S line of the current loop communication circuit on the indoor side. The second switch is arranged between the L line of the current loop communication circuit and the AC input end of the first switching power supply on the outdoor side. The clamping circuit is connected to the S line and N line of the current loop communication circuit on the outdoor side, and the clamping voltage output end of the clamping circuit is connected to the capacitor assembly of the first switching power supply.

2. The air conditioning system of claim 1, wherein, When the first switch is closed and the second switch is opened, a loop is formed between the L line and N line of the current loop communication circuit through the S line of the current loop communication circuit and the clamping circuit, the clamping voltage output end of the clamping circuit charges the capacitor assembly of the first switching power supply, and the voltage across the capacitor assembly of the first switching power supply is used to start the outdoor main control board.

3. The air conditioning system of claim 2, wherein, 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 of 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, and the primary side and the secondary side of the first transformer are grounded.

4. The air conditioning system of claim 3, wherein, The first switching power supply further includes a first diode, the positive electrode of the secondary side of the first transformer is connected to the positive electrode of the first diode, and the negative electrode of the first diode is connected to the negative electrode of the secondary side of the first transformer through the capacitor assembly of the first switching power supply.

5. The air conditioning system of claim 3, wherein, The clamping circuit includes a first resistor and a second resistor, a unidirectional conduction element, a clamping capacitor, and a voltage stabilizing diode, one end of the first resistor is connected to the S line of the current loop communication circuit, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to the positive electrode of the unidirectional conduction element, the negative electrode of the unidirectional conduction element is connected to the negative electrode output end of the rectifier bridge circuit, the clamping capacitor, the voltage stabilizing diode, and the second resistor are connected in parallel, the negative electrode of the voltage stabilizing diode is connected to the connection point of the first resistor and the second resistor, and the connection point of the first resistor and the second resistor is connected to the negative electrode of the first diode to provide a clamping voltage.

6. The air conditioning system according to any one of claims 1 to 5, wherein The first switching power supply further includes a voltage conversion circuit, the connection point of the capacitor assembly of the first switching power supply and the secondary side of the first transformer is connected to the voltage input end of the voltage conversion circuit, and the voltage output end of the voltage conversion circuit is connected to the main control chip of the outdoor main control board.

7. A method of waking up, characterized by The first switch is a low-power relay, and the second switch is a high-power relay. The indoor main control board applied to the air conditioning system of any one of claims 1 to 6, the wake-up method comprising: in response to the outdoor unit wake-up instruction, controlling the first switch to be closed to form the charging loop to charge the capacitor assembly of the first switching power supply; determining that the closing duration of the first switch reaches a preset closing duration, and controlling the first switch to be opened.

8. The wake-up method of claim 7, wherein, After the first switch is controlled to be opened, the wake-up method further comprises: sending a confirmation instruction to the outdoor master control board through the current loop communication circuit and waiting for a confirmation response instruction sent by the outdoor master control board; if the confirmation response instruction is not received within a response duration threshold, the first switch is controlled to be closed again.

9. The wake-up method of claim 8, wherein, The wake-up method further comprises: in the case that the confirmation response instruction is not received within the response duration threshold, a failure number is recorded; when the failure number reaches a preset number, a fault reminder is sent.

10. A method of starting, characterized by The outdoor master control board applied to the air conditioning system of any one of claims 1 to 6, the starting method comprising: closing the second switch after power-on wake-up.

11. The starting method of claim 10, wherein, After the second switch is closed, the wake-up method further comprises: turning on an outdoor data receiving optocoupler of the current loop communication circuit and waiting for receiving a confirmation instruction sent by the indoor master control board; after the confirmation instruction is received, sending a confirmation response instruction to the indoor master control board through an outdoor data sending optocoupler of the current loop communication circuit.

12. A controller characterized by comprising: The controller comprises at least one processor and a memory connected in communication with the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the wake-up method of any one of claims 7 to 9 or the starting method of any one of claims 10 to 11.

13. A master control board, characterized by, The controller comprises the controller of claim 12.

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