An air conditioner control circuit

Abstract

The application relates to an air conditioner control circuit. The circuit comprises a remote control signal receiving module, an indoor unit micro control unit, an indoor unit communication module, an outdoor unit micro control unit, an outdoor unit communication module, a battery micro control unit, a battery communication module and a battery. The air conditioner control circuit further comprises a power consumption control module. The remote control signal receiving module is connected with the indoor unit micro control unit, the indoor unit micro control unit is connected with the indoor unit communication module, the indoor unit communication module, the outdoor unit communication module and the battery communication module are mutually connected in communication, the outdoor unit communication module is connected with the outdoor unit micro control unit, the battery communication module is connected with the battery micro control unit, and the power consumption control module is connected with the outdoor unit micro control unit, the battery micro control unit and the battery. Through the setting of the power consumption control module, the outdoor unit can be woken up under the condition of complete power-off, and the technical problem that the outdoor-dragging indoor air conditioner cannot meet the demand of ultra-low power standby is solved.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an air conditioning control circuit. Background Technology

[0002] Existing air conditioners using a hybrid photovoltaic and energy storage power supply system connect the outdoor unit to AC mains power, photovoltaic DC power, and battery DC power, which in turn supplies DC power to the indoor unit. In standby mode, the indoor unit requires remote control input to restart, necessitating the operation of the remote control receiver module. Therefore, both the indoor and outdoor unit power supplies must operate simultaneously. However, this results in high standby power consumption, failing to meet the requirements for ultra-low power standby.

[0003] Currently, related technologies aim to reduce standby power consumption by reducing the number of indoor unit control modules and cutting off the outdoor unit power supply during standby. However, this solution is only for air conditioners with an indoor-mounted, outdoor-powered configuration and cannot address the issue that air conditioners with an outdoor-mounted, indoor-powered configuration cannot meet the requirements for ultra-low power standby.

[0004] There is currently no effective solution to the problem that outdoor air conditioners cannot meet the requirements for ultra-low power standby. Summary of the Invention

[0005] This application provides an air conditioning control circuit to solve the technical problem that an external-extended internal air conditioner cannot meet the requirements for ultra-low power standby.

[0006] According to one aspect of an embodiment of this application, this application provides an air conditioning control circuit, including: a remote control signal receiving module, an indoor unit microcontroller unit, an indoor unit communication module, an outdoor unit microcontroller unit, an outdoor unit communication module, a battery microcontroller unit, a battery communication module, and a battery. The air conditioning control circuit further includes a power consumption control module, wherein: the remote control signal receiving module is connected to the indoor unit microcontroller unit, the indoor unit microcontroller unit is connected to the indoor unit communication module, the indoor unit communication module, the outdoor unit communication module, and the battery communication module are communicatively connected to each other, the outdoor unit communication module is connected to the outdoor unit microcontroller unit, and the battery communication module is connected to the battery microcontroller unit. The power consumption control module... The control module is connected to the outdoor unit microcontroller, the battery microcontroller, and the battery, respectively. The remote control signal receiving module is used to receive external switch signals. The indoor unit microcontroller is used to control the indoor unit communication module to transmit the switch signals to the outdoor unit communication module and the battery communication module. The outdoor unit microcontroller is used to receive the switch signals transmitted by the outdoor unit communication module. The battery microcontroller is used to receive the switch signals transmitted by the battery communication module. The outdoor unit microcontroller and the battery microcontroller are also used to control the power consumption control module to cooperate according to the switch signals, so that the outdoor unit and the indoor unit enter or exit the low-power standby mode.

[0007] Optionally, the power consumption control module includes: a bidirectional DC-DC converter module and a low-power power supply line, wherein: one end of the bidirectional DC-DC converter module is connected to the battery, and the other end is connected to the switching power supply of the outdoor unit and the indoor unit respectively through a power supply circuit; the switching power supply of the outdoor unit is used to power the load of the outdoor unit, the microcontroller unit of the outdoor unit, and the communication module of the outdoor unit; the switching power supply of the indoor unit is used to power the display panel of the indoor unit, the remote control signal receiving module, the microcontroller unit of the indoor unit, and the communication module of the indoor unit; the battery is directly connected to the display panel of the indoor unit and the remote control signal receiving module through the low-power power supply line. The signal receiving module is connected to the indoor unit microcontroller unit; the power supply circuit is also connected to the mains power input; the bidirectional DC-DC converter module is used to convert the AC signal of the mains power input into a DC signal when the outdoor unit and indoor unit are not in the low-power standby mode, and to supply power to the switching power supply of the outdoor unit and the indoor unit through the power supply circuit, or to convert the AC signal output by the battery into a DC signal when the outdoor unit and indoor unit are in the low-power standby mode, and to directly supply power to the display panel of the indoor unit, the remote control signal receiving module and the indoor unit microcontroller unit through the low-power power supply line.

[0008] Optionally, the power supply circuit is also connected to the photovoltaic input, and the bidirectional DC-DC converter module is also used to convert the AC signal of the photovoltaic input into a DC signal when the outdoor unit and the indoor unit are not in the low-power standby mode, and to supply power to the switching power supply of the outdoor unit and the switching power supply of the indoor unit through the power supply circuit, or to charge the battery with the photovoltaic input.

[0009] Optionally, the low-power power supply line includes: a first normally closed relay and a second normally closed relay, wherein: the first normally closed relay and the second normally closed relay are connected in series in the low-power power supply line, the first normally closed relay is connected to the bidirectional DC-DC converter module, and the second normally closed relay is connected to the indoor unit microcontroller unit; the first normally closed relay is used to control the on / off state of the low-power power supply line according to the control signal of the bidirectional DC-DC converter module, and the second normally closed relay is used to control the on / off state of the low-power power supply line according to the control signal of the indoor unit microcontroller unit; the first normally closed relay and the second normally closed relay are in a closed state when power is off.

[0010] Optionally, the power supply circuit includes a positive DC bus and a negative DC bus. The power consumption control module further includes: a first normally open relay, a pre-charge circuit, and a cut-off circuit, wherein: the first normally open relay is connected in series on the positive DC bus and connected to the outdoor unit microcontroller unit; the first normally open relay is in an open state when power is off; the first normally open relay is used to control the on / off state of the power supply circuit according to the control signal of the outdoor unit microcontroller unit; the pre-charge circuit is connected in parallel with the first normally open relay and connected to the cut-off circuit; the cut-off circuit is connected to the battery microcontroller unit; the pre-charge circuit is used to connect the outdoor unit microcontroller unit to the positive DC bus according to the control signal of the cut-off circuit when the first normally open relay is off, so as to wake up the outdoor unit microcontroller unit; the cut-off circuit is used to control the on / off state of the pre-charge circuit according to the control signal of the battery microcontroller unit.

[0011] Optionally, the pre-charge circuit includes: a second normally open relay and a positive temperature coefficient thermistor, wherein: the second normally open relay is connected in series with the positive temperature coefficient thermistor, and the second normally open relay is used to control the on / off state of the pre-charge circuit according to the control signal of the cut-off circuit.

[0012] Optionally, when the remote control signal receiving module receives a shutdown signal, the indoor unit microcontroller unit is used to control the indoor unit communication module to transmit the shutdown signal to the outdoor unit communication module and the battery communication module. The outdoor unit microcontroller unit is used to control the first normally open relay to open according to the shutdown signal, and the battery microcontroller unit is used to control the disconnection circuit to open the second normally open relay according to the shutdown signal, so as to disconnect the power supply circuit and de-energize the switching power supply of the outdoor unit and the indoor unit.

[0013] Optionally, when the power supply circuit is disconnected, the capacitors in the indoor and outdoor units are in a discharging state. The first normally closed relay and the second normally closed relay are also used to close when the capacitor voltage drops to a first target threshold, so as to conduct the low-power power supply line, so that the bidirectional DC-DC converter module converts the AC signal output by the battery into a DC signal, and directly supplies power to the display panel of the indoor unit, the remote control signal receiving module and the indoor unit microcontroller unit through the low-power power supply line.

[0014] Optionally, when the remote control signal receiving module receives a power-on signal, the indoor unit microcontroller unit is used to control the indoor unit communication module to transmit the power-on signal to the battery communication module. The battery communication module is used to transmit the power-on signal to the battery microcontroller unit. The battery microcontroller unit is used to control the cut-off circuit to close the second normally open relay according to the power-on signal, so as to conduct the pre-charge circuit, so as to connect the outdoor unit microcontroller unit to the positive DC bus, thereby waking up the outdoor unit microcontroller unit.

[0015] Optionally, when the pre-charging circuit is open, the pre-charging circuit is also used to charge the capacitors in the outdoor unit and the indoor unit to reduce the voltage difference between the two busbars of the pre-charging circuit. The outdoor unit microcontroller unit is also used to detect the voltage difference until the voltage difference is less than the second target threshold, at which point the first normally open relay is closed to open the power supply circuit.

[0016] Optionally, when the power supply circuit is reconnected, the bidirectional DC-DC converter module is further configured to disconnect the first normally closed relay, and the indoor unit microcontroller unit is further configured to disconnect the second normally closed relay, so as to disconnect the low-power power supply line and switch to powering the outdoor unit and indoor unit through the power supply circuit.

[0017] Optionally, when the remote control signal receiving module receives a shutdown signal, the indoor unit microcontroller unit is also used to start a timer, and if no new signal is received within a preset time period, control the indoor unit communication module to transmit the shutdown signal to the outdoor unit communication module and the battery communication module.

[0018] Compared with related technologies, the technical solutions provided in this application have the following advantages:

[0019] This application provides an air conditioner control circuit, including: a remote control signal receiving module, an indoor unit microcontroller unit, an indoor unit communication module, an outdoor unit microcontroller unit, an outdoor unit communication module, a battery microcontroller unit, a battery communication module, and a battery. The air conditioner control circuit also includes a power consumption control module, wherein: the remote control signal receiving module is connected to the indoor unit microcontroller unit; the indoor unit microcontroller unit is connected to the indoor unit communication module; the indoor unit communication module, the outdoor unit communication module, and the battery communication module are communicatively connected to each other; the outdoor unit communication module is connected to the outdoor unit microcontroller unit; the battery communication module is connected to the battery microcontroller unit; and the power consumption control module is connected to... The outdoor unit microcontroller, the battery microcontroller, and the battery are connected. The remote control signal receiving module receives external switch signals. The indoor unit microcontroller controls the indoor unit communication module to transmit the switch signals to the outdoor unit communication module and the battery communication module. The outdoor unit microcontroller receives the switch signals transmitted by the outdoor unit communication module. The battery microcontroller receives the switch signals transmitted by the battery communication module. The outdoor unit microcontroller and the battery microcontroller also control the power consumption control module to cooperate according to the switch signals, so that the outdoor unit and the indoor unit enter or exit low-power standby mode. This application, through the setting of the power consumption control module, enables the outdoor unit of an air conditioner with an outdoor-split indoor power supply to be woken up even when completely powered off after entering ultra-low power standby mode, solving the technical problem that outdoor-split indoor air conditioners cannot meet the requirements of ultra-low power standby. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0022] Figure 1 This is a block diagram of an optional air conditioning control circuit according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of an optional air conditioning control circuit according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of an optional disconnection circuit provided according to an embodiment of this application;

[0025] Reference numerals: 1. Remote control signal receiving module; 2. Indoor unit microcontroller unit; 3. Indoor unit communication module; 4. Outdoor unit microcontroller unit; 5. Outdoor unit communication module; 6. Battery microcontroller unit; 7. Battery communication module; 8. Battery; 9. Power consumption control module; 901. Bidirectional DC-DC converter module; 902. Low-power power supply line; K1. First normally closed relay; K2. Second normally closed relay; K3. First normally open relay; 903. Pre-charge circuit; 904. Cut-off circuit; P+. Positive DC bus; P-. Negative DC bus; K4. Second normally open relay; PTC. Positive temperature coefficient thermistor. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustration and has no specific meaning in itself. Therefore, "module" and "part" may be used interchangeably.

[0028] To address the problems mentioned in the background art, according to one aspect of an embodiment of this application, an embodiment of an air conditioning control circuit is provided. For example... Figure 1 As shown, the air conditioner control circuit includes: a remote control signal receiving module 1, an indoor unit microcontroller unit 2, an indoor unit communication module 3, an outdoor unit microcontroller unit 4, an outdoor unit communication module 5, a battery microcontroller unit 6, a battery communication module 7, and a battery 8. The air conditioner control circuit also includes a power consumption control module 9, wherein:

[0029] The remote control signal receiving module 1 is connected to the indoor unit microcontroller unit 2, the indoor unit microcontroller unit 2 is connected to the indoor unit communication module 3, the indoor unit communication module 3, the outdoor unit communication module 5 and the battery communication module 7 are interconnected, the outdoor unit communication module 5 is connected to the outdoor unit microcontroller unit 4, the battery communication module 7 is connected to the battery microcontroller unit 6, and the power consumption control module 9 is connected to the outdoor unit microcontroller unit 4, the battery microcontroller unit 6 and the battery 8 respectively;

[0030] The remote control signal receiving module 1 is used to receive external switch signals. The indoor unit microcontroller unit 2 is used to control the indoor unit communication module 3 to transmit the switch signals to the outdoor unit communication module 5 and the battery communication module 7. The outdoor unit microcontroller unit 4 is used to receive the switch signals transmitted by the outdoor unit communication module 5. The battery microcontroller unit 6 is used to receive the switch signals transmitted by the battery communication module 7. The outdoor unit microcontroller unit 4 and the battery microcontroller unit 6 are also used to control the power consumption control module 9 to cooperate according to the switch signals, so that the outdoor unit and the indoor unit enter or exit the low power standby mode.

[0031] In this embodiment of the application, in order to meet the user's ultra-low power standby requirements, the application sets the power consumption control module so that the indoor unit can shut down the power supply of unnecessary low-voltage loads, and only the remote control signal receiving module 1 and the indoor unit micro control unit 2 work, so as to minimize the power consumption of the indoor unit, completely power off the outdoor unit, and the outdoor unit can be re-wake up in the case of complete power failure, thereby realizing the ultra-low power standby mode of the air conditioner with the outdoor unit connected to the indoor unit, and meeting the user's needs.

[0032] In this embodiment of the application, in the ultra-low power standby mode, the operating power of the entire air conditioner can be controlled below 1W. At this time, the outdoor unit is completely turned off, the power supply of the indoor unit's low-voltage load is not working and is in a silent state, and the power consumption is generated only from the static power consumption of the indoor unit.

[0033] In this embodiment, the remote control signal receiving module 1 is used in conjunction with the receiving remote control, so the external switch signal is the remote control's power-on signal, power-off signal, etc. The indoor unit communication module 3, the outdoor unit communication module 5, and the battery communication module 7 can all use RS-485 communication.

[0034] In this embodiment, the power consumption control module 9 is used not only to shut down unnecessary low-voltage loads on the indoor unit and completely shut down the outdoor unit, allowing both the indoor and outdoor units to enter a low-power standby mode, but also, in the low-power standby mode, to control the low-voltage power supply VCC (shared with the busbar) provided by the battery 8 to provide the necessary power to the indoor unit's display panel, remote control signal receiving module 1, and indoor unit microcontroller unit 2. Furthermore, when the remote control signal receiving module 1 receives a power-on signal from the remote control, it wakes up the completely powered-off outdoor unit, thereby cooperating with the outdoor unit microcontroller unit 4 to fully power on both the indoor and outdoor units, restore normal operation, and complete the restart. The power consumption control module 9 will be described in detail below.

[0035] In an optional embodiment, such as Figure 2 As shown, the power consumption control module includes: a bidirectional DC-DC converter module 901 and a low-power power supply line 902, wherein:

[0036] One end of the bidirectional DC-DC converter module 901 is connected to the battery 8, and the other end is connected to the switching power supply of the outdoor unit and the switching power supply of the indoor unit through a power supply circuit. The switching power supply of the outdoor unit is used to power the load of the outdoor unit, the microcontroller unit 4 of the outdoor unit and the communication module 5 of the outdoor unit. The switching power supply of the indoor unit is used to power the display panel of the indoor unit, the remote control signal receiving module 1, the microcontroller unit 2 of the indoor unit and the communication module 3 of the indoor unit.

[0037] The battery 8 is directly connected to the display panel of the indoor unit, the remote control signal receiving module 1, and the indoor unit microcontroller unit 2 through the low-power power supply line 902.

[0038] The power supply circuit is also connected to the mains power input;

[0039] The bidirectional DC-DC converter module 901 is used to convert the AC signal input from the mains power supply into a DC signal when the outdoor unit and indoor unit are not in the low-power standby mode, and to supply power to the switching power supply of the outdoor unit and the indoor unit through the power supply circuit. Alternatively, when the outdoor unit and indoor unit are in the low-power standby mode, it is used to convert the AC signal output from the battery 8 into a DC signal, and to supply power directly to the display panel of the indoor unit, the remote control signal receiving module 1, and the indoor unit microcontroller unit 2 through the low-power power supply line 902.

[0040] In this embodiment, under normal circumstances, the power supply line is connected, and the bidirectional DC-DC converter module 901 continuously converts the AC power input into a DC signal to power the outdoor unit's switching power supply and the indoor unit's switching power supply, thereby powering the outdoor unit and indoor unit to operate normally. When entering low-power standby mode, the power control module cuts off the power supply circuit, completely shutting down the outdoor unit and indoor unit, and then connects the low-power power supply line 902. This controls the battery 8 to directly provide low-voltage power VCC to the indoor unit's display panel, remote control signal receiving module 1, and indoor unit microcontroller unit 2 through the low-power power supply line 902, enabling the remote control signal receiving module 1 to receive the power-on signal sent by the remote control, and enabling the indoor unit microcontroller unit 2 to process the power-on signal normally.

[0041] In addition, the air conditioner provided in this application embodiment can be connected to a photovoltaic input, that is, the power supply circuit is also connected to the photovoltaic input. The bidirectional DC-DC converter module 901 is also used to convert the AC signal of the photovoltaic input into a DC signal when the outdoor unit and the indoor unit are not in the low power standby mode, and to supply power to the switching power supply of the outdoor unit and the switching power supply of the indoor unit through the power supply circuit, or to charge the battery 8 with the photovoltaic input.

[0042] In this embodiment, the low-power power supply line 902 is controlled by two normally closed relays, which will be described below.

[0043] In an optional embodiment, such as Figure 2 As shown, the low-power power supply line 902 includes: a first normally closed relay K1 and a second normally closed relay K2, wherein:

[0044] The first normally closed relay K1 and the second normally closed relay K2 are connected in series in the low-power power supply line 902. The first normally closed relay K1 is connected to the bidirectional DC-DC converter module 901, and the second normally closed relay K2 is connected to the indoor microcontroller unit 2.

[0045] The first normally closed relay K1 is used to control the on / off state of the low-power power supply line 902 according to the control signal of the bidirectional DC-DC converter module 901, and the second normally closed relay K2 is used to control the on / off state of the low-power power supply line 902 according to the control signal of the indoor microcontroller unit 2. The first normally closed relay K1 and the second normally closed relay K2 are in the closed state when the power is off.

[0046] In this embodiment, "normally open" and "normally closed" refer to the state of the relay switch when the relay electromagnetic coil is de-energized. When the relay control terminal of a normally open relay is de-energized, the relay electromagnetic coil is not magnetic and does not engage, thus the switch is open. When the relay control terminal is energized, the relay electromagnetic coil becomes magnetic and engages, thus the switch is closed. Similarly, when the relay control terminal is de-energized, the relay electromagnetic coil becomes magnetic and engages, thus the switch is closed. When the relay control terminal is energized, the relay electromagnetic coil is not magnetic and does not engage, thus the switch is open.

[0047] In this embodiment, after the remote control signal receiving module 1 receives the power-off signal, the outdoor unit and the indoor unit need to enter a low-power standby mode. At this time, the power supply circuit needs to be cut off to completely power off the outdoor unit and conduct the low-power power supply line 902 so that the necessary modules of the indoor unit (such as the remote control signal receiving module 1 and the indoor unit microcontroller 2) are supplied with low-voltage power VCC by the battery through the low-power power supply line 902. That is to say, when entering the low-power standby mode, the power supply mode of the necessary modules of the indoor unit needs to be switched from the power supply circuit to the low-power power supply line 902. The cutting off of the power supply circuit is completed by the cooperation of the outdoor unit microcontroller 4 and the battery microcontroller 6, while the conduction of the low-power power supply line 902 can be actively completed by the bidirectional DC-DC converter module 901 and the indoor unit microcontroller 2. That is, the bidirectional DC-DC converter module 901 cuts off the power supply of the first normally closed relay K1, causing the first normally closed relay K1 to be de-energized and closed, and the indoor unit microcontroller 2 cuts off the power supply of the second normally closed relay K2, causing the second normally closed relay K2 to be de-energized and closed, thereby turning on the low-power power supply line 902.

[0048] In an optional implementation, the low-power power supply line 902 can also be self-conducting based entirely on the circuit function. That is, after the outdoor unit microcontroller 4 and the battery microcontroller 6 work together to cut off the power supply circuit, the capacitors in the outdoor unit and indoor unit will gradually discharge because the outdoor unit and indoor unit are disconnected from the bus. When the voltage drops to a certain value, the first normally closed relay K1 and the second normally closed relay K2 will automatically close after being de-energized, realizing the self-conducting of the low-power power supply line 902. Thus, the battery can directly provide the low-voltage power supply VCC to the necessary modules of the indoor unit through the low-power power supply line 902.

[0049] The following section will explain how the power consumption control module 9, the outdoor unit microcontroller 4, and the battery microcontroller 6 work together to complete the power supply circuit cutoff.

[0050] In an optional embodiment, such as Figure 2 As shown, the power supply circuit includes a positive DC bus P+ and a negative DC bus P-. The power consumption control module further includes: a first normally open relay K3, a pre-charging circuit 903, and a cut-off circuit 904, wherein:

[0051] The first normally open relay K3 is connected in series on the positive DC bus P+ and connected to the outdoor unit microcontroller 4. The first normally open relay K3 is in the open state when the power is off. The first normally open relay K3 is used to control the on and off of the power supply circuit according to the control signal of the outdoor unit microcontroller 4.

[0052] The pre-charging circuit 903 is connected in parallel with the first normally open relay K3 and is connected to the disconnection circuit 904. The disconnection circuit 904 is connected to the battery microcontroller unit 6. The pre-charging circuit 903 is used to connect the outdoor unit microcontroller unit 4 to the positive DC bus P+ according to the control signal of the disconnection circuit 904 when the first normally open relay K3 is disconnected, so as to wake up the outdoor unit microcontroller unit 4. The disconnection circuit 904 is used to control the on / off of the pre-charging circuit 903 according to the control signal of the battery microcontroller unit 6.

[0053] In this embodiment, the first normally open relay K3 is directly connected in series with the positive DC bus and is controlled by the outdoor unit microcontroller 4. When the outdoor unit microcontroller receives a shutdown signal, it cuts off the power supply to the first normally open relay K3, causing the first normally open relay K3 to open. At the same time, the battery microcontroller 6 controls the cut-off circuit to cut off the pre-charge circuit, so that the outdoor unit and the indoor unit are completely powered off. At this time, the capacitors in the outdoor unit and the indoor unit will gradually discharge. When the voltage drops to a certain value, the first normally closed relay K1 and the second normally closed relay K2 are automatically closed after being de-energized, realizing the self-conduction of the low-power power supply line 902. Thus, the battery can directly provide the low-voltage power supply VCC to the necessary modules of the indoor unit through the low-power power supply line 902.

[0054] In the embodiments of this application, such as Figure 2 As shown, the pre-charge circuit 903 includes: a second normally open relay K4 and a positive temperature coefficient thermistor PTC, wherein: the second normally open relay K4 is connected in series with the positive temperature coefficient thermistor PTC, and the second normally open relay K4 is used to control the on / off state of the pre-charge circuit 903 according to the control signal of the cut-off circuit 904.

[0055] In the embodiments of this application, such as Figure 3 As shown, the cutoff circuit 904 uses a transistor as a switch. The control signal from the battery microcontroller 6 controls the conduction or cutoff of the left transistor, which in turn controls the conduction or cutoff of the right transistor. Specifically, when the voltage of the control signal output by the battery microcontroller 6 is greater than the cutoff voltage of the left transistor, the left transistor conducts, thereby controlling the right transistor to conduct. VCC2 then supplies power to the second normally open relay K4, causing K4 to close and the pre-charge circuit 903 to conduct. Conversely, when the voltage of the control signal output by the battery microcontroller 6 is less than the cutoff voltage of the left transistor, the left transistor is cut off, thereby controlling the right transistor to turn off. VCC2 cannot supply power to the second normally open relay K4, causing K4 to open and thus cutting off the pre-charge circuit 903.

[0056] The following is based on Figure 2 A complete explanation of entering low-power standby mode.

[0057] When the remote control signal receiving module 1 receives a shutdown signal, the indoor unit microcontroller 2 controls the indoor unit communication module 3 to transmit the shutdown signal to the outdoor unit communication module 5 and the battery communication module 7. The outdoor unit microcontroller 4 controls the first normally open relay K3 to open according to the shutdown signal, and the battery microcontroller 6 controls the disconnection circuit 904 to open the second normally open relay K4 according to the shutdown signal, so as to disconnect the power supply circuit and de-energize the switching power supply of the outdoor unit and the indoor unit.

[0058] When the power supply circuit is disconnected, the capacitors in the indoor and outdoor units are in a discharging state. The first normally closed relay K1 and the second normally closed relay K2 close when the capacitor voltage drops to the first target threshold, thereby activating the low-power power supply line 902. This allows the bidirectional DC-DC converter module 901 to convert the AC signal output from the battery 8 into a DC signal, which then directly powers the indoor unit's display panel, the remote control signal receiving module 1, and the indoor unit's microcontroller unit 2 via the low-power power supply line 902. The aforementioned first target threshold can be set according to actual needs.

[0059] This completes the switch to low-power standby mode, which can meet customers' long-term standby needs with extremely low power consumption.

[0060] In low-power standby mode, the indoor unit's microcontroller unit 2 and the remote control signal receiving module 1 are still running, thus enabling them to receive and process the power-on signal sent by the remote control. To exit low-power standby mode, the completely powered-off outdoor unit needs to be woken up first. After the remote control signal receiving module 1 receives the power-on signal sent by the remote control, the process of waking up the completely powered-off outdoor unit begins, as described below. Figure 2 Next, we will explain how the power consumption control module wakes up the outdoor unit.

[0061] When the remote control signal receiving module 1 receives a power-on signal, the indoor unit microcontroller 2 controls the indoor unit communication module 3 to transmit the power-on signal to the battery communication module 7. The battery communication module 7 then transmits the power-on signal to the battery microcontroller 6. The battery microcontroller 6 controls the cut-off circuit 904 to close the second normally open relay K4 according to the power-on signal, so as to conduct the pre-charge circuit 903, so that the outdoor unit microcontroller 4 can be connected to the positive DC bus P+ to wake up the outdoor unit microcontroller 4.

[0062] When the pre-charging circuit 903 is activated, it also charges the capacitors in the outdoor and indoor units to reduce the voltage difference between the busbars at both ends of the pre-charging circuit 903. After being woken up, the outdoor unit microcontroller 4 continuously monitors the voltage difference until it detects that the voltage difference is less than the second target threshold, at which point it closes the first normally open relay K3 to activate the power supply circuit. The second target threshold can be set according to actual needs.

[0063] When the power supply circuit is reconnected, the bidirectional DC-DC converter module 901 disconnects the first normally closed relay K1, and the indoor unit microcontroller unit 2 disconnects the second normally closed relay K2 to disconnect the low-power power supply line 902 and switch to powering the outdoor unit and indoor unit through the power supply circuit.

[0064] At this point, the outdoor and indoor units of the air conditioner have restarted and resumed normal operation.

[0065] In an optional embodiment, when the remote control signal receiving module 1 receives a shutdown signal, the indoor unit microcontroller unit 2 is further configured to start a timer, and if no new signal is received within a preset time period, control the indoor unit communication module 3 to transmit the shutdown signal to the outdoor unit communication module 5 and the battery communication module 7.

[0066] In this embodiment of the application, in order to prevent the user from repeatedly turning the computer on and off or accidentally turning it off in a short period of time, when the indoor unit receives the shutdown signal, it can wait for a time T before executing the shutdown command. If a new signal is received during this period, the operation will be interrupted.

[0067] This application, through the setting of the power consumption control module, enables the outdoor unit of an air conditioner with an external detachment and internal power supply to be woken up when the power is completely cut off after entering the ultra-low power standby mode, thus solving the technical problem that the air conditioner with an external detachment and internal power supply cannot meet the requirements of ultra-low power standby.

[0068] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An air conditioning control circuit, comprising: The system comprises a remote control signal receiving module, an indoor unit microcontroller unit, an indoor unit communication module, an outdoor unit microcontroller unit, an outdoor unit communication module, a battery microcontroller unit, a battery communication module, and a battery. The air conditioning control circuit further includes a power consumption control module, wherein: The remote control signal receiving module is connected to the indoor unit microcontroller unit, the indoor unit microcontroller unit is connected to the indoor unit communication module, the indoor unit communication module, the outdoor unit communication module and the battery communication module are interconnected, the outdoor unit communication module is connected to the outdoor unit microcontroller unit, the battery communication module is connected to the battery microcontroller unit, and the power consumption control module is connected to the outdoor unit microcontroller unit, the battery microcontroller unit and the battery respectively; The remote control signal receiving module is used to receive external switch signals. The indoor unit microcontroller unit is used to control the indoor unit communication module to transmit the switch signals to the outdoor unit communication module and the battery communication module. The outdoor unit microcontroller unit is used to receive the switch signals transmitted by the outdoor unit communication module. The battery microcontroller unit is used to receive the switch signals transmitted by the battery communication module. The outdoor unit microcontroller unit and the battery microcontroller unit are also used to control the power consumption control module to cooperate according to the switch signals, so that the outdoor unit and the indoor unit enter or exit the low power standby mode. The power consumption control module includes a bidirectional DC-DC converter module and a low-power power supply line. One end of the bidirectional DC-DC converter module is connected to the battery, and the other end is connected to the switching power supply of the outdoor unit and the indoor unit via a power supply circuit. The outdoor unit's switching power supply powers the outdoor unit's load, the outdoor unit's microcontroller unit, and the outdoor unit's communication module. The indoor unit's switching power supply powers the indoor unit's display panel, the remote control signal receiving module, the indoor unit's microcontroller unit, and the indoor unit's communication module. The battery is directly connected to the indoor unit's display panel, the remote control signal receiving module, and the indoor unit's microcontroller unit via the low-power power supply line. The power supply circuit is also connected to the mains power input. The power supply circuit includes a positive DC bus and a negative DC bus. The power consumption control module further includes: a first normally open relay, a pre-charge circuit, and a cut-off circuit. The first normally open relay is connected in series on the positive DC bus and to the outdoor unit microcontroller unit. The first normally open relay is in an open state when power is off. The first normally open relay is used to control the on / off state of the power supply circuit according to the control signal from the outdoor unit microcontroller unit. The pre-charge circuit is connected in parallel with the first normally open relay and to the cut-off circuit. The cut-off circuit is connected to the battery microcontroller unit. The pre-charge circuit is used to connect the outdoor unit microcontroller unit to the positive DC bus according to the control signal from the cut-off circuit when the first normally open relay is open, thereby waking up the outdoor unit microcontroller unit. The cut-off circuit is used to control the on / off state of the pre-charge circuit according to the control signal from the battery microcontroller unit.

2. The circuit according to claim 1, characterized in that, The bidirectional DC-DC converter module is used to convert the AC signal input from the mains power supply into a DC signal when the outdoor unit and indoor unit are not in the low-power standby mode, and to supply power to the switching power supply of the outdoor unit and the indoor unit through the power supply circuit. Alternatively, when the outdoor unit and indoor unit are in the low-power standby mode, it is used to convert the AC signal output from the battery into a DC signal, and to supply power directly to the display panel of the indoor unit, the remote control signal receiving module, and the indoor unit microcontroller unit through the low-power power supply line.

3. The circuit according to claim 2, characterized in that, The power supply circuit is also connected to the photovoltaic input. The bidirectional DC-DC converter module is also used to convert the AC signal of the photovoltaic input into a DC signal when the outdoor unit and the indoor unit are not in the low-power standby mode, and to supply power to the switching power supply of the outdoor unit and the switching power supply of the indoor unit through the power supply circuit, or to charge the battery with the photovoltaic input.

4. The circuit according to claim 2, characterized in that, The low-power supply line includes: a first normally closed relay and a second normally closed relay, wherein: The first normally closed relay and the second normally closed relay are connected in series in the low-power power supply line. The first normally closed relay is connected to the bidirectional DC-DC converter module, and the second normally closed relay is connected to the indoor microcontroller unit. The first normally closed relay is used to control the on / off state of the low-power power supply line according to the control signal of the bidirectional DC-DC converter module, and the second normally closed relay is used to control the on / off state of the low-power power supply line according to the control signal of the internal microcontroller unit. The first normally closed relay and the second normally closed relay are in the closed state when the power is off.

5. The circuit according to claim 4, characterized in that, The pre-charge circuit includes: a second normally open relay and a positive temperature coefficient thermistor, wherein: The second normally open relay is connected in series with the positive temperature coefficient thermistor, and the second normally open relay is used to control the on / off state of the pre-charge circuit according to the control signal of the cut-off circuit.

6. The circuit according to claim 5, characterized in that, When the remote control signal receiving module receives a shutdown signal, the indoor unit microcontroller unit controls the indoor unit communication module to transmit the shutdown signal to the outdoor unit communication module and the battery communication module. The outdoor unit microcontroller unit controls the first normally open relay to open according to the shutdown signal, and the battery microcontroller unit controls the disconnection circuit to open the second normally open relay according to the shutdown signal, so as to disconnect the power supply circuit and de-energize the switching power supply of the outdoor unit and the indoor unit.

7. The circuit according to claim 6, characterized in that, When the power supply circuit is disconnected, the capacitors in the indoor and outdoor units are in a discharging state. The first normally closed relay and the second normally closed relay are also used to close when the capacitor voltage drops to the first target threshold, so as to conduct the low-power power supply line, so that the bidirectional DC-DC converter module converts the AC signal output by the battery into a DC signal, and directly supplies power to the display panel of the indoor unit, the remote control signal receiving module and the microcontroller unit of the indoor unit through the low-power power supply line.

8. The circuit according to claim 5, characterized in that, When the remote control signal receiving module receives a power-on signal, the indoor unit microcontroller unit controls the indoor unit communication module to transmit the power-on signal to the battery communication module. The battery communication module then transmits the power-on signal to the battery microcontroller unit. The battery microcontroller unit controls the cut-off circuit to close the second normally open relay according to the power-on signal, thereby connecting the pre-charge circuit to the positive DC bus and waking up the outdoor unit microcontroller unit.

9. The circuit according to claim 8, characterized in that, When the pre-charging circuit is open, the pre-charging circuit is also used to charge the capacitors in the outdoor unit and the indoor unit to reduce the voltage difference between the two busbars of the pre-charging circuit. The outdoor unit microcontroller unit is also used to detect the voltage difference until the voltage difference is less than the second target threshold, at which point the first normally open relay is closed to open the power supply circuit.

10. The circuit according to claim 9, characterized in that, When the power supply circuit is reconnected, the bidirectional DC-DC converter module is also used to disconnect the first normally closed relay, and the indoor unit microcontroller unit is also used to disconnect the second normally closed relay to disconnect the low-power power supply line and switch to powering the outdoor unit and indoor unit through the power supply circuit.

11. The circuit according to claim 5, characterized in that, When the remote control signal receiving module receives a shutdown signal, the indoor unit microcontroller unit is also used to start a timer. If no new signal is received within a preset time period, the indoor unit communication module is controlled to transmit the shutdown signal to the outdoor unit communication module and the battery communication module.

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