Air conditioner power supply control system, method and device, air conditioner equipment and storage medium

Abstract

The application relates to an air conditioner power supply control system, method and device, air conditioner equipment and a storage medium. The system comprises: a power input end connected to the input end of each power relay control module; the output end of each power relay control module is connected to the input end of a power transformation module; at least two power relay control modules correspond to different input voltages; the output end of the power transformation module is connected to the input end of a system power supply relay control module; the output end of a backup power supply module is connected to the input end of the system power supply relay control module; the output end of the system power supply relay control module is connected to the input end of a water level detection module; the output end of the water level detection module is connected to the input end of a master control module, and the output end of the master control module is connected to the power relay control module and the system power supply relay control module. Thus, the anti-power disturbance ability of the air conditioner power supply is improved, and false alarms and false protection actions caused by power interruption are fundamentally eliminated.

Description

Technical Field

[0001] This application relates to the field of intelligent air conditioning technology, and in particular to an air conditioning power control system, method, device, air conditioning equipment and storage medium. Background Technology

[0002] Non-communication residential air conditioning units hold a significant market share in North America due to their ease of installation, modular design, and flexible configuration. These units consist of a thermostat, indoor unit, and outdoor unit, with each component controlled unidirectionally via a 24VAC switch. The 24VAC output from the indoor unit serves both as the control command carrier and as power supply to the thermostat. North American households commonly use 115VAC and 230VAC power supplies; existing dual-power North American residential units can automatically switch circuits to stably output 24VAC by detecting the input power.

[0003] In the air conditioning industry, normally open reed float switches are commonly used for water level detection. These switches open when the water level is normal and close when the water is full. 24VAC, as the preferred safety switching voltage in the North American industry standard, is widely used as the excitation power supply for float switches. It offers advantages such as strong anti-interference over long distances, arc extinguishing at AC zero-crossing points, extended contact life, and compliance with UL / CSA safety regulations.

[0004] However, existing dual-power North American residential units have the following drawbacks: When the unit is powered on or the input power voltage fluctuates, an input power detection is required. During this process, the relay in the power transformer input circuit briefly disconnects, causing a 24VAC interruption. The water level detection circuit becomes unsignaled due to the loss of excitation signal, and the main chip cannot distinguish between "normal water level but switch open" and "signal loss," misinterpreting it as a "full water" fault. This triggers the drain pump to run dry and shut down, resulting in misleading fault codes, increased after-sales service calls, and shortened drain pump lifespan due to frequent start-stop cycles. Summary of the Invention

[0005] This application provides an air conditioning power control system, method, device, air conditioning equipment, and storage medium to solve the technical problem in the prior art where, during the input power detection of a dual-power North American residential unit, a brief interruption of 24VAC causes the water level detection signal to be lost, and the main chip cannot distinguish between the normal state and the signal loss state, thus misjudging it as a full water fault.

[0006] In a first aspect, this application provides an air conditioning power control system, which includes: a power input terminal, at least two different power relay control modules, a power transformer module, a backup power module, a system power supply relay control module, a water level detection module, and a main control module. The power input terminal is connected to the input terminal of each of the power relay control modules. The output terminal of each power relay control module is connected to the input terminal of the power transformer module; the output terminal of the power transformer module is connected to the input terminal of the system power supply relay control module; the power transformer module is used to output a first preset voltage; at least two power relay control modules correspond to different input voltages respectively. The output terminal of the backup power module is connected to the input terminal of the system power supply relay control module; the backup power module is used to output a second preset voltage. The output terminal of the system power supply relay control module is connected to the input terminal of the water level detection module; The output terminal of the water level detection module is connected to the input terminal of the main control module, and the output terminal of the main control module is connected to the power relay control module and the system power supply relay control module respectively.

[0007] As an optional implementation, the power relay control module includes a first power relay control module and a second power relay control module; The input terminals of the first power relay control module and the second power relay control module are both connected to the power input terminal; The output terminal of the first power relay control module is connected to the first voltage tap of the power transformer module. The output terminal of the second power relay control module is connected to the second voltage tap of the power transformer module; the first voltage tap and the second voltage tap are different, and the voltage output by the power transformer module is less than the input voltage of the power input terminal.

[0008] As an optional implementation, the main control module is used to output a first control signal, a second control signal, and a third control signal; The first control signal is used to control the on / off state of the first power relay control module, the second control signal is used to control the on / off state of the second power relay control module, and the third control signal is used to control the switching of the system power supply relay control module. The third control signal is obtained by logical operation of the first control signal and the second control signal: when both the first control signal and the second control signal are low, the third control signal is high, and the system power supply relay control module switches to the backup power supply module. When one of the first control signal and the second control signal is high, and the third control signal is low, the system power supply relay control module switches to the power transformer module.

[0009] As an optional implementation, the first power relay control module includes a first relay and a first drive circuit connected in series, and the second power relay control module includes a second relay and a second drive circuit connected in series. The first driving circuit includes a first switching transistor, the control terminal of the first switching transistor receives the first control signal, the first conducting terminal of the first switching transistor is connected to the coil of the first relay, and the second conducting terminal of the first switching transistor is grounded, for driving the first relay to switch on and off according to the first control signal; The second driving circuit includes a second switching transistor. The control terminal of the second switching transistor receives the second control signal. The first conducting terminal of the second switching transistor is connected to the coil of the second relay, and the second conducting terminal of the second switching transistor is grounded. It is used to drive the second relay to switch on and off according to the second control signal.

[0010] As an optional implementation, the system power supply relay control module includes a first switching branch and a second switching branch; The first switching branch is connected between the first output terminal of the power transformer module and the first output terminal of the backup power module, and the output terminal of the first switching branch is connected to the first input terminal of the water level detection module. The second switching branch is connected between the second output terminal of the power transformer module and the second output terminal of the backup power module, and the output terminal of the second switching branch is connected to the second input terminal of the water level detection module. The first switching branch and the second switching branch switch synchronously.

[0011] As an optional implementation, the system power supply relay control module includes a third relay and a fourth relay; Both the third and fourth relays are single-pole double-throw relays and are synchronously driven by the same control signal; The normally closed terminal of the third relay is connected to the first output terminal of the power transformer module, the normally open terminal is connected to the first output terminal of the backup power module, and the common terminal is connected to the first input terminal of the water level detection module. The normally closed terminal of the fourth relay is connected to the second output terminal of the power transformer module, the normally open terminal is connected to the second output terminal of the backup power module, and the common terminal is connected to the second input terminal of the water level detection module.

[0012] As an optional implementation, the water level detection module includes a water level switch and an optocoupler; The output terminal of the first switching branch is connected to the first terminal of the water level switch, and the second terminal of the water level switch is connected to the first terminal of the primary side of the optocoupler; the water level switch is a normally open reed switch, which is open when the water level is normal and closed when the water is full. The output of the second switching branch is connected to the second terminal of the primary side of the optocoupler; The secondary side of the optocoupler is connected to the input terminal of the main control module; the optocoupler is used to convert the on / off state of the water level switch into a level signal that the main control module can recognize, and to prevent the second preset voltage of the backup power module from flowing back to the output terminal of the power transformer module when the system power supply relay control module switches to the backup power module.

[0013] Secondly, this application provides an air conditioner power control method, applied to any of the air conditioner power control systems described in the first aspect, the method comprising: Obtain the voltage input status of the power input terminal; Based on the voltage input state, the connection state of the power relay control module and the system power supply relay control module in the air conditioning power control system is controlled so as to supply power to the water level detection module through the power transformer module or the backup power module.

[0014] As an optional implementation, obtaining the voltage input state of the power input terminal includes: Detect the input voltage at the power input terminal; When the unit is detected to be powered on or the input voltage changes, the voltage input state of the power input terminal is determined to be a voltage detection state. If the input voltage at the power input terminal is detected to be any preset voltage value, the voltage input state of the power input terminal is determined to be a voltage determination state.

[0015] As an optional implementation, controlling the connection state of the power relay control module and the system power supply relay control module within the air conditioning power control system according to the voltage input state includes: When the voltage input state is in voltage detection state, the power relay control module is controlled to disconnect, causing the power transformer module to stop outputting the first preset voltage. At the same time, the system power supply relay control module is controlled to switch to the backup power module, and the backup power module provides the second preset voltage to the water level detection module. When the voltage input state is a voltage-determined state, the current input voltage value of the power input terminal is obtained; the power relay control module corresponding to the voltage value is controlled to turn on, so that the power transformer module resumes outputting the first preset voltage, and at the same time, the system power supply relay control module is controlled to switch to the power transformer module, so that the power transformer module provides the first preset voltage to the water level detection module.

[0016] As an optional implementation, the power relay control module includes a first power relay control module and a second power relay control module; controlling the connection status of the power relay control module and the system power supply relay control module within the air conditioning power control system includes: Output a first control signal and a second control signal to control the on / off state of the first power relay control module and the second power relay control module, respectively; A third control signal is generated based on the level states of the first and second control signals; When both the first control signal and the second control signal are low, the third control signal is high, controlling the system power supply relay control module to switch to the backup power supply module; When one of the first control signal and the second control signal is high, the third control signal is low, controlling the system power supply relay control module to switch to the power transformer module.

[0017] As an optional implementation, the water level detection module of the air conditioning power control system includes a water level switch and an optocoupler, and the method further includes: The level signal is received through the secondary side of the optocoupler; When the level signal is high, it is determined that the water level switch is turned on, and the water level in the receiving tray is full. When the level signal is low, it is determined that the water level switch is open, and the water level in the receiving tray is in a normal state.

[0018] As an optional implementation, after determining that the water level in the receiving tray is full, the method further includes: Output drainage control commands to control the start of the drainage pump, and / or output shutdown protection commands to control the compressor and / or fan to shut down; After the water level switch returns to the open state, a recovery command is output to control the compressor and / or the fan to restart.

[0019] Thirdly, this application provides an air conditioner power control device, applied to any of the air conditioner power control systems described in the first aspect, the device comprising: The status acquisition module is used to acquire the voltage input status of the power input terminal; The control module is used to control the connection status of the power relay control module and the system power supply relay control module in the air conditioning power control system according to the voltage input status, so as to supply power to the water level detection module through the power transformer module or the backup power module.

[0020] Fourthly, this application provides an air conditioning device, including: an air conditioning power control system, a processor, a communication interface, a memory, and a communication bus; Wherein, the air conditioner power control system is any of the air conditioner power control systems described in the first aspect; The processor, communication interface, and memory communicate with each other via a communication bus; the memory is used to store computer programs; the processor is used to execute the computer program to implement the air conditioner power control method described in any one of the second aspects.

[0021] Fifthly, this application provides a storage medium having a computer program stored thereon, which, when executed by a processor, constitutes the air conditioning power control method according to any one of the second aspects.

[0022] Compared with the prior art, the technical solution provided in this application has the following advantages: The air conditioning power control system provided in this application avoids the technical problem of signal loss due to power interruption at the physical topology level by constructing a system architecture of main and backup dual-path isolated power supply and control closed-loop linkage. In the system, the water level detection module is not directly connected to the single power circuit provided by the power transformer module, but is connected to the power transformer module for main power supply and the backup power module for redundant power supply through the system power supply relay control module as a switching hub, forming two physically isolated power supply links; the control end of the switching hub is connected to the main control module, and together with the main control module, they form a closed-loop linkage structure of monitoring-feedback-execution—when When the main control module determines that the unit has entered the power detection state, it can directly control the module through the system power supply relay to seamlessly transfer the excitation source of the water level detection module to the backup power module. This ensures that the water level detection module continuously receives a valid excitation signal during the brief interruption of the main power supply, thereby completely avoiding the cause of the main chip misjudging a fault due to signal loss. This improves the air conditioner power supply's resistance to power disturbances, fundamentally eliminates false alarms and false protection actions caused by power interruptions, avoids the drain pump from frequently running dry due to false signals and the compressor from frequently starting and stopping due to misjudgment, effectively extending the service life of core components such as the drain pump and compressor; it also eliminates the confusion caused to users by misleading fault codes and reduces after-sales maintenance calls. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0026] Figure 1 This is a schematic diagram of the structure of an air conditioning power control system provided in an embodiment of this application; Figure 2 This is a schematic diagram of another air conditioning power control system provided in an embodiment of this application; Figure 3 This is a schematic diagram of another air conditioning power control system provided in an embodiment of this application; Figure 4 A flowchart illustrating an embodiment of an air conditioner power control method provided in this application; Figure 5 This is a schematic diagram of another air conditioning power control system provided in an embodiment of this application; Figure 6 A schematic diagram of the structure of an air conditioning power control system provided in this application embodiment; Figure 7 This application provides a schematic diagram of the structure of an indoor unit mainboard water level detection system for an air conditioner, as shown in the embodiments of this application. Figure 8 A block diagram illustrating an embodiment of an air conditioner power control device provided in this application; Figure 9 This is a schematic diagram of the structure of an air conditioning device provided in an embodiment of this application. Detailed Implementation

[0027] 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.

[0028] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0029] To address the technical problem in existing dual-power North American residential air conditioners where a brief interruption of the 24VAC circuit during input power detection leads to signal loss in the water level detection signal, causing the main chip to misjudge a full water fault due to its inability to distinguish between normal and signal-missing states, this application provides an air conditioning power control system. This system avoids the signal loss problem caused by power interruption at the physical topology level by constructing a system architecture with primary and backup dual-path isolated power supply and closed-loop control linkage. In this system, the water level detection module is not directly connected to a single power circuit provided by the power transformer module. Instead, it is connected to both the primary power transformer module and the redundant backup power module via a system power supply relay control module, forming two physically isolated power supply links. The control terminal of this switching center is connected to the main control module. Together with the main control module, it forms a closed-loop linkage structure of monitoring-feedback-execution. When the main control module determines that the unit has entered the power detection state, it can directly control the module through the system power supply relay to seamlessly transfer the excitation source of the water level detection module to the backup power module. This ensures that the water level detection module continuously receives a valid excitation signal during the brief interruption of the main power supply, thereby completely avoiding the cause of the main chip misjudging the fault due to signal loss. This improves the air conditioner power supply's resistance to power disturbances, fundamentally eliminates false alarms and false protection actions caused by power interruptions, avoids the drain pump from frequently running dry due to false signals and the compressor from frequently starting and stopping due to misjudgment, and effectively extends the service life of core components such as the drain pump and compressor. It also eliminates the trouble caused to users by misleading fault codes and reduces after-sales maintenance calls.

[0030] The air conditioning power control system provided in this application will be further explained and described below with reference to the accompanying drawings and specific embodiments. The embodiments do not constitute a limitation on the embodiments of this application.

[0031] See Figure 1 This is a schematic diagram of the structure of an air conditioning power control system provided in an embodiment of this application. Figure 1 As shown, the air conditioning power control system 100 may include: a power input terminal 11, at least two different power relay control modules 12, a power transformer module 13, a backup power module 14, a system power supply relay control module 15, a water level detection module 16, and a main control module 17. The at least two power relay control modules correspond to different input voltages.

[0032] The power input terminal 11 serves as the interface between the air conditioning power control system 100 and the external power supply network, used to connect to the AC input voltage from the power grid. Optionally, in North American residential air conditioning applications, this input terminal can connect to two different voltage levels of mains power—115VAC or 230VAC. This input terminal is not a modular component with independent functions, but rather refers to the line endpoint introduced from the external power source, directly connected to the contact input terminal of the power relay control module. Its core function is to provide the original electrical energy input for the entire air conditioning power control system; all subsequent power conversion, distribution, and management are based on the AC voltage obtained from this input terminal.

[0033] The aforementioned at least two different power relay control modules 12 are key actuators for matching the input power supply with the taps of the power transformer module 13. The air conditioning power control system provided in this application may include two or more power relay control modules, each corresponding to a different input voltage specification. Specifically, the power relay control module 12 can be used to switch different AC input voltages connected to the power input terminal to the corresponding taps of the power transformer module 13 according to the control signal output from the main control module, enabling the power transformer module 13 to stably output the AC operating power required by the air conditioning system under different input voltages.

[0034] The aforementioned power transformer module 13 is the core component for voltage conversion, and it can be a power transformer with a multi-tap primary winding. Optionally, the primary side of the power transformer module 13 can be provided with multiple taps, which are used to match different input voltages (such as 115VAC taps and 230VAC taps). Each tap is connected to the output terminal of the corresponding relay in the power relay control module. The secondary side is an output winding with a fixed turns ratio, used to output the first preset voltage required by the air conditioning system. The power transformer module 13 can operate based on the principle of electromagnetic induction—when the input power is connected to the corresponding primary tap through the relay, the power transformer module can convert the input voltage to the first preset voltage according to a fixed turns ratio, for example, stepping down 115VAC or 230VAC to 24VAC output. Regardless of whether the input is 115V or 230V, by selecting different primary taps, a constant 24VAC output on the secondary side can be guaranteed.

[0035] The aforementioned backup power module 14 is a redundant power supply unit that provides temporary operating power to the water level detection module 16 during a brief interruption of the main power supply due to power detection. Optionally, this module may not be an external independent input power supply, but rather consists of an internal switching power supply module and a voltage conversion module of the air conditioning unit. The switching power supply module has a wide voltage input capability (85VAC~265VAC), which rectifies and steps down the input AC power to a first DC voltage (such as 12VDC). The voltage conversion module further converts this DC voltage into a stable second DC voltage (5VDC) as a backup excitation power output.

[0036] The aforementioned system power supply relay control module 15 is the core component for switching the load excitation power supply between primary and backup modes. Optionally, in the power-off (default) state, the system power supply relay control module 15 can connect the first preset voltage output from the power transformer module to the water level detection module 16; in the power-on state, it can connect the second preset voltage output from the backup power supply module to the water level detection module. Its core function is to seamlessly switch the excitation source of the water level detection module from the primary power supply to the backup power supply during power detection, according to the instructions of the main control module, and restore it to the primary power supply after detection is completed, ensuring that the water level detection module can obtain an effective excitation signal under any operating condition.

[0037] The water level detection module 16 mentioned above is the object that is powered and controlled. Optionally, the water level detection module can be a water level detection functional unit or other types of water level detection modules. This application embodiment does not limit this.

[0038] The aforementioned main control module 17 is the decision-making and command core of the entire air conditioning power control system. It can be an MCU (Microcontroller Unit). Its core function is to coordinate the collaborative work of each module through the air conditioning power control method provided below.

[0039] In one embodiment, based on the above structure, each module included in the air conditioning power control system 100 may have the following connection method: Power input terminal 11 is connected to the input terminal I of each power relay control module 12. 12 Different power relay control modules 12 can be adapted to different input voltages. The power relay control module 12 is used to input the AC power input from the power input terminal 11 to the power transformer module 13.

[0040] The output terminal O of each power relay control module 12 12 Connect to the input terminal I of the power transformer module 13 13 Output terminal O of power transformer module 13 13Connect the input terminal I of the system power supply relay control module 15 15 The power transformer module 13 is used to output a first preset voltage, which can be the AC voltage required by the air conditioning system, such as 24VAC.

[0041] The output terminal O of the aforementioned backup power module 14 14 Connect the input terminal I of the system power supply relay control module 15 15 The backup power module 14 can be used to output a second preset voltage. The second preset voltage refers to the DC backup voltage output by the backup power module 14, which replaces the first preset voltage to power the water level detection module 16 when the unit is in power detection mode.

[0042] The output terminal O of the power supply relay control module 15 of the above system 15 Connect to input terminal I of water level detection module 16 16 The system power supply relay control module 15 can be used to selectively input the first preset voltage or the second preset voltage to the water level detection module 16. Optionally, the system power supply relay control module 15 can respond to the control signal of the main control module 17 to input the first preset voltage or the second preset voltage to the water level detection module 16.

[0043] The output terminal O of the above-mentioned water level detection module 16 16 Input terminal I of main control module 17 17 The output terminal O of the aforementioned main control module 17 17 The main control module 17 is connected to the power relay control module 12 and the system power supply relay control module 15, respectively. The main control module 17 can control the connection status of the power relay control module 12 and the system power supply relay control module 15 based on the voltage input status of the power input terminal 11, and output control commands for controlling the operation of the air conditioner based on the load operation signal from the water level detection module 16. These control commands are a set of commands generated by the main control module 17 based on the load operation signal (e.g., the level signal corresponding to the on / off state of the water level switch) fed back from the water level detection module, used to drive the air conditioner to perform corresponding protection or recovery actions.

[0044] Optionally, when the water level detection module includes a water level switch for detecting the water level in the air conditioning system, the control command may include at least the following three specific commands: First, a drainage start command: when the signal from the water level detection module 16 indicates that the water level in the drip tray has reached the warning line (full), the main control module 17 outputs this command to start the drainage pump to begin drainage; second, a shutdown protection command: after confirming the full water condition, the main control module 17 simultaneously outputs this command to shut down the compressor and / or fan to prevent condensate overflow from damaging the equipment or causing safety hazards; third, a resumption of operation command: when the signal from the water level detection module 16 indicates that the water level has returned to normal (the water level switch is disconnected again), the main control module 17 outputs this command to control the compressor and / or fan to restart, allowing the air conditioner to resume normal operation. Through the coordinated output of the above control commands, the main control module 17 can orderly execute drainage and shutdown protection actions under actual full water conditions, while avoiding false command outputs due to misjudgment, thereby achieving safe management and intelligent control of the air conditioning operating status.

[0045] The air conditioning power control system provided in this application avoids the technical problem of signal loss due to power interruption at the physical topology level by constructing a system architecture with dual-path isolated power supply and closed-loop control linkage. In the system, the water level detection module is not directly connected to the single power circuit provided by the power transformer module, but is connected to both the power transformer module for main power supply and the backup power module for redundant power supply through the system power supply relay control module, forming two physically isolated power supply links. The control terminal of the switching center is connected to the main control module, and together with the main control module, they form a closed-loop linkage structure of monitoring-feedback-execution. When the main control module determines that the unit has entered the power detection range, the system will automatically switch to the main control module. During status testing, the excitation source of the water level detection module can be seamlessly transferred to the backup power module directly through the system power supply relay control module. This ensures that the water level detection module continuously receives a valid excitation signal during brief interruptions of the main power supply, thereby completely avoiding the cause of the main chip misjudging a fault due to signal loss. This improves the air conditioner power supply's resistance to power disturbances, fundamentally eliminates false alarms and false protection actions caused by power interruptions, avoids frequent idling of the drain pump due to false signals and frequent start-stop of the compressor due to misjudgment, effectively extending the service life of core components such as the drain pump and compressor; it also eliminates the confusion caused to users by misleading fault codes and reduces after-sales maintenance calls.

[0046] Further, see Figure 2 This is a schematic diagram of another air conditioning power control system provided in an embodiment of this application. As one embodiment, Figure 2 The air conditioning power control system shown is in Figure 1Based on the structure shown, the power relay control module 12 is further defined to include a first power relay control module 121 and a second power relay control module 122. For example... Figure 2 As shown, the power relay control module 12 may include a first power relay control module 121 and a second power relay control module 122.

[0047] Among them, the input terminal I of the first power relay control module 121 mentioned above 121 The input terminal I of the second power relay control module 122 122 Both are connected to the power input terminal 11. The first power relay control module 121 and the second power relay control module 122 can correspond to different input voltages of the power input terminal 11.

[0048] The output terminal O of the aforementioned first power relay control module 121 121 The first voltage tap 131 of the power transformer module 13 is connected to the second power relay control module 122 and the output terminal O. 122 The second voltage tap 132 is connected to the power transformer module 13. The first voltage tap 131 and the second voltage tap 132 are different, and the voltage output by the power transformer module 13 is less than the input voltage of the power input terminal 11.

[0049] In one embodiment, the first power relay control module 121 may correspond to the first input voltage of the power input terminal 11, and the second power relay control module 122 may correspond to the second input voltage of the power input terminal 11.

[0050] Based on this, optionally, when the input voltage of the power input terminal 11 is the first input voltage, the first power relay control module 121 can respond to the first control signal input by the main control module 17 to switch the first input voltage connected to the power input terminal 11 to the first voltage tap of the power transformer module 13, so that the power transformer module 13 can stably output the first preset voltage under the first input voltage (e.g., 230VAC).

[0051] Optionally, when the input voltage of the power input terminal 11 is the second input voltage, the second power relay control module 122 can respond to the second control signal input by the main control module 17 to switch the second input voltage connected to the power input terminal 11 to the second voltage tap of the power transformer module 13, so that the power transformer module 13 can stably output the first preset voltage under the second input voltage (e.g., 115VAC).

[0052] Furthermore, in one embodiment, the main control module 17 can be used to output a first control signal, a second control signal, and a third control signal. The first control signal can be used to control the on / off state of the first power relay module, the second control signal can be used to control the on / off state of the second power relay module, and the third control signal can be used to control the switching of the system power supply relay control module.

[0053] Optionally, the aforementioned third control signal can be obtained from the first control signal and the second control signal through the following logical operation: when both the first control signal and the second control signal are low, the third control signal is high, and the system power supply relay control module 15 switches to the backup power supply module 14; when one of the first control signal and the second control signal is high, the third control signal is low, and the system power supply relay control module 15 can switch to the power transformer module 13.

[0054] As an optional implementation, to implement the above logical operation, the main control module may include a control sub-module and a logic operation sub-module. The control sub-module may be a main chip, and the logic operation sub-module may be a NOR gate chip. The control sub-module can be used to determine a first control signal and a second control signal, and input the first control signal and the second control signal into the logic operation sub-module. The logic operation sub-module can be used to perform logical operations on the first control signal and the second control signal to obtain a third control signal.

[0055] Furthermore, in one embodiment, the aforementioned first power relay control module 121 may include a first relay connected in series (e.g., Figure 6 K1 as shown) and the first drive circuit (e.g. Figure 6 The drive circuit composed of Q1, R3, and R4 shown above), the second power relay control module 122 may include a second relay connected in series (e.g., Figure 6 K2 shown) and the second drive circuit (e.g. Figure 6 The driving circuit composed of Q2, R5, and R6 is shown.

[0056] Optionally, the first driving circuit described above may include a first switching transistor (e.g., Figure 6 As shown in Q1), the control terminal of the first switching transistor receives a first control signal, the first conducting terminal of the first switching transistor is connected to the coil of the first relay, and the second conducting terminal of the first switching transistor is grounded, which is used to drive the first relay to switch on and off according to the first control signal.

[0057] The aforementioned second driving circuit may include a second switching transistor (e.g., Figure 6As shown in Q2), the control terminal of the second switch receives the second control signal, the first conducting terminal of the second switch is connected to the coil of the second relay, and the second conducting terminal of the second switch is grounded, which is used to drive the second relay to switch on and off according to the second control signal.

[0058] The air conditioning power control system provided in this application embodiment achieves precise selection and safe isolation of transformer taps under different input voltage conditions by setting up two power relay control modules with parallel input terminals and output terminals connected to different taps of the transformer. The two modules are driven by different control signals output from the main control module, and only one module can be turned on at any given time. This avoids the risk of winding burnout or magnetic circuit saturation caused by two different voltage input power supplies being connected to the primary winding of the transformer at the same time, from a physical structure perspective. The output terminals of each module are connected to taps with different turns ratios of the transformer, so that the number of turns of the primary winding of the transformer is adaptively adjusted with the input voltage, ensuring that the secondary winding always outputs the load requirement at a fixed step-down ratio, regardless of whether 115VAC or 230VAC is connected. The same voltage value (24VAC) ensures that the downstream water level detection module and temperature controller receive consistent power supply conditions under both power grid standards. Simultaneously, the voltage switching function of the relay contacts and the voltage reduction function of the transformer are structurally separated—the relay is only responsible for selecting the path and does not change the voltage, while the transformer is only responsible for voltage transformation and does not participate in the selection decision. Each performs its own function clearly, reducing the electrical stress on individual components and preventing the failure of any single component from causing a complete system failure. Furthermore, utilizing the high isolation characteristics of the relay contacts, unselected input voltage taps are physically disconnected from the input terminal, further eliminating circulating current interference between different voltage taps caused by common ground or leakage, thus improving the system's safety redundancy and long-term operational reliability.

[0059] Further, see Figure 3 This is a schematic diagram of another air conditioning power control system provided in the embodiments of this application. Figure 3 The air conditioning power control system 100 shown is in Figure 1 or Figure 2 Based on the structure shown, the system power supply relay control module 15 is further described as including a first switching branch 151 and a second switching branch 152. For example... Figure 3 As shown, the connection method of the first switching branch 151 and the second switching branch 152 is as follows: The first switching branch 151 is connected to the first output terminal O of the power transformer module 13. 131 With the first output terminal O of the backup power module 14 141 Between, the output terminal O of the first switching branch 151 mentioned above 151 Connect the first input terminal I of the water level detection module 16 161 .

[0060] The second switching branch 152 is connected to the second output terminal O of the power transformer module 13. 132 With the second output terminal O of the backup power module 14 142 Between, the output terminal O of the aforementioned second switching branch 152 152 Connect the second input terminal I of the water level detection module 16 162 The first switching branch 151 and the second switching branch 152 switch synchronously.

[0061] Furthermore, in one embodiment, the aforementioned system power supply relay control module 15 may include a third relay (e.g., Figure 6 The single-pole double-throw relay K3 and the fourth relay (e.g., the one shown) are shown. Figure 6 The single-pole double-throw relay K4 is shown.

[0062] Optionally, the third and fourth relays mentioned above can both be single-pole double-throw relays and are synchronously driven by the same control signal.

[0063] As a connection method, the normally closed terminal of the third relay is connected to the first output terminal O of the power transformer module 13. 131 The normally open terminal is connected to the first output terminal O of the backup power module 14. 141 The public terminal connects to the first input terminal I of the water level detection module 16. 161 .

[0064] The normally closed terminal of the fourth relay is connected to the first output terminal O of the power transformer module 13. 131 The normally open terminal is connected to the second output terminal O of the backup power module 14. 142 The public terminal connects to the second input terminal I of the water level detection module 16. 162 .

[0065] Furthermore, in one embodiment, the water level detection module 16 may include a water level switch and an optocoupler (e.g., Figure 6 The water level switch and U1 are shown.

[0066] As a connection method, the output terminal O of the first switching branch 151 mentioned above... 151 The first terminal of the water level switch is connected, and the second terminal of the water level switch is connected to the first terminal of the primary side of the optocoupler. Optionally, the water level switch can be a normally open reed switch, which is open at the normal water level and closed when the water is full.

[0067] The output terminal O of the second switching branch 152 mentioned above 152 The second end is connected to the primary side of the optocoupler.

[0068] The secondary side of the aforementioned optocoupler is connected to the input terminal I of the main control module 17. 17The aforementioned optocoupler is used to switch the on / off state of the water level switch to a level signal recognized by the main control module 17, and to prevent the second preset voltage of the backup power supply module 14 from flowing back to the output terminal O of the power transformer module 13 when the system power supply relay control module 15 switches to the backup power supply module 14. 13 .

[0069] The air conditioning power control system provided in this application embodiment, by setting a dual-branch synchronous switching structure in the system power supply relay control module to simultaneously switch the excitation path and return path, ensures that the two branches always belong to the same power supply (main power supply or backup power supply). This avoids the safety hazards of direct short circuit between the reference grounds (24VAC_N and GND) of the two power supplies due to switching only a single branch, forming unexpected loops, or causing current backflow. At the same time, synchronous switching ensures that there will be no instantaneous open circuit or misconnection during the switching process, so that the water level detection signal remains continuous and stable before and after the power switching, avoiding the problems caused by transient abnormalities in the loop. The signal jitter or false triggering is prevented; in addition, the two branches each undertake the on / off control of different polarities in the power supply circuit, effectively realizing the complete physical isolation between the main power supply (24VAC) and the backup power supply (5VDC), ensuring that the primary side of the optocoupler works only under a single excitation source, simplifying the signal detection logic, and improving the electromagnetic compatibility and long-term operational reliability of the system; this structure drives the two switching switches to operate synchronously by the same control signal, without relying on software timing coordination, ensuring precise synchronization of the switching timing from the hardware level, enabling the system to achieve seamless switching within the short window period of milliseconds triggered by power detection.

[0070] based on Figures 1 to 3 This application provides an air conditioner power control method for any air conditioner power control system. The following description, in conjunction with the accompanying drawings, provides a further explanation of the air conditioner power control method provided by this application through specific embodiments. These embodiments do not constitute a limitation on the embodiments of this application.

[0071] See Figure 4 This is a flowchart illustrating an embodiment of an air conditioner power control method provided in this application. As an example... Figure 4 The process shown can be applied to Figures 1-3 Any air conditioning power control system. For example... Figure 4 As shown, the process may include the following steps: Step 401: Obtain the voltage input status of the power input terminal.

[0072] The aforementioned power input terminal refers to the interface between the air conditioner power control system and the external power supply network, used to connect to the AC input voltage from the power grid. In North American residential air conditioning applications, it can connect to either 115VAC or 230VAC, two different voltage levels of mains power.

[0073] The aforementioned voltage input state refers to the current operating condition stage of the power input terminal, which may include, but is not limited to: "voltage detection state" in which input power detection is in progress and "voltage determination state" in which the detection has been completed and the voltage value has been confirmed.

[0074] In this step, the execution entity of this application embodiment can be a main control module, for example... Figures 1-3 The main control module 17 in any structural system. Based on this, the execution subject of this application embodiment can acquire the voltage input status of the power input terminal in real time or periodically during the operation of the air conditioning power control system.

[0075] In one embodiment, the executing entity of this application embodiment can detect the input voltage of the power input terminal when obtaining the voltage input state of the power input terminal.

[0076] Optionally, when the unit is detected to be powered on or when the aforementioned input voltage changes, the voltage input state at the power input terminal can be determined to be a voltage detection state.

[0077] Optionally, if the input voltage at the power input terminal is detected to be any preset voltage value, the voltage input state of the power input terminal can be determined to be a voltage determination state. The preset voltage value is a pre-defined voltage value that the power input terminal may input, such as 115VAC or 230VAC.

[0078] Step 402: Based on the voltage input status mentioned above, control the connection status of the power relay control module and the system power supply relay control module in the air conditioning power control system, so as to supply power to the water level detection module through the power transformer module or the backup power module.

[0079] The connection status mentioned above refers to the on / off state of the relay contacts in each relay module. For the power relay control module, it refers to whether the corresponding relay contact connects the input power to the corresponding tap of the power transformer module. For the system power supply relay control module, it refers to whether its contact connects the water level detection module to the main power supply, i.e., the power output of the power transformer module, or to the backup power supply, i.e., the backup power supply module.

[0080] In this step, in order to ensure that the power supply to the water level detection module in the air conditioning power control system is continuous and uninterrupted, the execution subject of this application embodiment can control the connection status of the power relay control module and the system power supply relay control module in the air conditioning power system according to the voltage input status, so as to supply power to the water level detection module through the power transformer module or the backup power module.

[0081] In one embodiment, based on Figures 1 to 3In any of the air conditioning power control systems shown, when the voltage input state is in voltage detection state, the power relay control module can be in the off state. At this time, to ensure power supply to the water level detection module, the main control module can control the power relay control module to disconnect, causing the power transformer module to stop outputting the first preset voltage. Simultaneously, the system power supply relay control module switches to the backup power module, which then provides the second preset voltage to the water level detection module. When the voltage input state is in voltage determination state, the input to the power transformer module is stable. The main control module can obtain the current input voltage value at the power input terminal and control the power relay control module corresponding to that voltage value to turn on, causing the power transformer module to resume outputting the first preset voltage. Simultaneously, the system power supply relay control module switches to the power transformer module, which then provides the first preset voltage to the water level detection module.

[0082] As an optional implementation method, through Figure 2 As shown in the diagram, the power relay control module may include a first power relay control module and a second power relay control module. Based on this, when the main control module controls the connection status of the power relay control module and the system power supply relay control module within the air conditioning power control system, it can output a first control signal and a second control signal to control the on / off state of the first power relay control module and the second power relay control module, respectively.

[0083] Subsequently, a third control signal can be generated based on the level states of the first and second control signals. Specifically, when both the first and second control signals are at low levels, the third control signal is at a high level, and the system power supply relay control module switches to the backup power supply module; when either the first or second control signal is at a high level, the third control signal is at a low level, and the system power supply relay control module switches to the power transformer module.

[0084] As a control method, when the voltage input state is in voltage detection state, the main control module can generate a low-level first control signal and a second control signal, as well as a high-level third control signal, thereby controlling the system power supply relay control module to switch to the backup power supply module, and both the first power supply relay control module and the second power supply relay control module are in the off state.

[0085] As another control method, when the voltage input state is a voltage-determined state, the main control module can obtain the current input voltage value at the power input terminal. When the voltage value is a first preset voltage value, it can generate a high-level first control signal, as well as a low-level second control signal and a third control signal, thereby controlling the first power relay control module to be in the on state, the second power relay control module to be in the off state, and the system power supply relay control module to be in the off state.

[0086] As another control method, when the voltage input state is a voltage-determined state, the main control module can obtain the current input voltage value at the power input terminal. When the voltage value is a second preset voltage value, it can generate a high-level second control signal, as well as a low-level first control signal and a third control signal, thereby controlling the second power relay control module to be in the on state, the first power relay control module to be in the off state, and the system power supply relay control module to be in the off state.

[0087] Furthermore, in one embodiment, the water level detection module of the aforementioned air conditioning power control system may include a water level switch and an optocoupler. This module can be used for water level detection in the air conditioning system. Based on this, the main control module can receive level signals through the secondary side of the optocoupler.

[0088] Optionally, when the signal level is high, it can be determined that the water level switch is on, thus confirming that the water level in the water tray of the air conditioning system is full.

[0089] In this case, a drainage control command can be output to control the start of the drainage pump. And / or, a shutdown protection command can be output to control the compressor, fan, or shut down the compressor and fan.

[0090] After confirming that the water level switch has returned to the open state, the main control module can output a recovery command to control the compressor and fan, or to restart the compressor and fan.

[0091] Optionally, when the signal level is low, it can be determined that the water level switch is open, thus confirming that the water level in the water tray of the air conditioning system is normal.

[0092] The technical solution provided in this application embodiment obtains the voltage input state of the power input terminal, and controls the connection state of the power relay control module and the system power supply relay control module in the air conditioning power control system according to the voltage input state, so as to supply power to the water level detection module through the power transformer module or the backup power module. This technical solution distinguishes between the unit's current state ("voltage detection state") and "voltage determination state") by acquiring the voltage input status at the power input terminal. Based on this state, it controls the connection status of the power relay control module and the system power supply relay control module, achieving coordinated control of power adaptation and load power management. Through a state-recognition-driven linkage switching mechanism, it not only eliminates false alarms and false protection actions triggered by power detection, avoiding idling of the drain pump and frequent compressor starts and stops to extend component lifespan, but also achieves precise control of switching timing through structured state division—activating the backup power supply only during the brief window of the voltage detection state, while maintaining main power supply under other operating conditions. This ensures the continuous reliability of the water level detection function under all operating conditions, minimizes reliance on the backup power supply, and improves the overall power supply efficiency and long-term operational stability of the air conditioning system.

[0093] To facilitate understanding of the air conditioning power control system and air conditioning power control method provided in this application, the following example illustrates the situation where the voltage at the power input terminal includes 115VAC or 230VAC, the first preset voltage output by the power transformer module is 24VAC, and the water level detection module includes a water level switch and an optocoupler.

[0094] See Figure 5 This is a schematic diagram of another air conditioning power control system provided in an embodiment of this application. Figure 5 As shown, the air conditioning power control system 100 may include: unit input power (equivalent to...) Figure 1 The power input terminal 11 and the 230V relay control module 10 (equivalent to) are shown. Figure 2 The first power relay control module 121 and the 115V relay control module 20 shown are equivalent to Figure 2 The second power relay control module 122 and the power transformer 30 shown are equivalent to Figure 1 The power transformer module 13 and the water level detection 24VAC or 5VDC circuit relay control module 40 (equivalent to...) are shown. Figure 3 The diagram shows the first switching branch 151 and the second switching branch 152, the water level signal optical coupler isolation detection module 50 (equivalent to the water level detection module 16), the main chip control module 60, and the NOR gate chip 70 (composed of the main chip control module 60 and the NOR gate chip 70). Figure 1 The main control module 17 is shown.

[0095] Specifically, the core functions of each module are as follows: the unit input power supply provides AC power to the entire unit; the 230V and 115V relay control modules switch transformers to adapt to the mains voltage according to the main control instructions; the power transformer steps down the high-voltage mains voltage to a dedicated 24VAC power supply for detection; the water level detection circuit relay control module switches the power source for water level detection based on the control signal C; the water level switch collects the physical state of the accumulated water level in real time; the optocoupler isolation detection module achieves strong and weak current isolation, filters out interference, and converts the water level signal level; the main chip control module serves as the core of the entire unit's operation and control, coordinating the logic of voltage switching and water level protection; and the NOR gate chip performs logical operations on the two main control signals and outputs water level power switching instructions.

[0096] Based on this Figure 5 The principle of the system shown is as follows: The starting point of the air conditioner power control system 100 is the unit input power supply. The power supply line is divided into two parallel connections to the 230V relay control module 10 and the 115V relay control module 20. The outputs of the two voltage switching modules are connected to the primary side of the power transformer 30. The main chip control module 60 sends control signals to adjust the mains power specifications connected to the transformer.

[0097] Meanwhile, the secondary output of the power transformer 30 is a 24V AC voltage, which is used as the main power supply for water level detection and connected to the 24VAC or 5VDC circuit relay control module 40 for water level detection. This module is also connected to the 5V DC backup power supply of the whole machine, realizing hardware switching between the two detection excitation power supplies. The output circuit of the water level detection relay module 40 is connected in series with a water level switch. The on / off signal of the water level switch is sent to the water level signal optocoupler isolation detection module 50. After the module processes the signal, it outputs a standardized water level switch detection signal and transmits it to the main chip control module 60.

[0098] Optionally, the main chip control module 60 receives water level sampling signals to complete the logic judgment for unit start-up / shutdown and full water protection. On the other hand, it outputs two control signals A and B. One signal is sent back to the 115V and 230V relay control modules to complete the mains voltage switching control, and the other signal is sent to the NOR gate chip 70. The NOR gate chip 70 performs logical operations on the control signals A and B to generate control signal C, which is sent in reverse to the water level detection circuit relay control module 40 to realize the automatic switching between the 24V AC and 5V DC detection power supplies, forming a complete closed-loop control system.

[0099] Furthermore, based on Figure 5 The modular system structure shown is illustrated below, along with a detailed structural diagram of the air conditioner power control system. (See also...) Figure 6 This is a schematic diagram of another air conditioning power control system provided in an embodiment of this application. Figure 6As shown, K1, Q1, R3, and R4 constitute a 230V relay control module 10; K2, Q2, R5, and R6 constitute a 115V relay control module 20; L1 constitutes a power transformer 30; D2, R16, R17, K3, K4, Q3, Q4, R9, R10, R11, and R12 constitute a 24VAC or 5VDC circuit relay control module 40 for water level detection; and U1, R14, R15, and C1 constitute a water level signal optocoupler isolation detection module 50.

[0100] AC mains power AC_L and AC_N are used as input power supplies and are connected to the main contact circuits of relays K1 and K2 respectively. K1 corresponds to a 230VAC voltage path and K2 corresponds to a 115VAC voltage path. The relay coil is powered by 5V DC. The coil control terminals are connected to transistors Q1 and Q2 respectively. The control signals A and B output by the main chip are sent to the bases of Q1 and Q2 through 2.2KΩ current-limiting resistors R4 and R6. R3 and R5 are transistor pull-up protection resistors.

[0101] When the control signal is valid, the transistor conducts, and the corresponding relay engages, connecting the matching voltage to the primary winding of power transformer L1. The secondary winding of the transformer then stably outputs two AC low-voltage circuits, 24VAC_L and 24VAC_N, completing the process. Figure 5 The function of power transformer 30: The 24V AC output from the transformer is rectified by diode D2, divided by resistors R16 and R17, and then fed into the control circuit of single-pole double-throw relays K3 and K4. K3 and K4 correspond to... Figure 5The water level detection circuit relay control module 40 has a relay coil powered by 5V. The bases of the coil-driven transistors Q3 and Q4 receive the control signal C output by the NOR gate U2 through current-limiting resistors R10 and R12. R9 and R11 are pull-up resistors for the transistors. The two input pins of the NOR gate U2 receive control signals A (first control signal) and B (second control signal) from the main chip, respectively, and output control signal C (third control signal) according to NOR logic. This controls the on / off state of Q3 and Q4, switching the contact circuits of K3 and K4: when signal C is high, the transistors are turned on, and the relay contacts are connected to the 5V DC backup circuit, using 5VDC as the excitation for water level detection; when signal C is low, the transistors are turned off, and the relay contacts are connected to the 24VAC AC circuit by default, using the AC power output from the transformer to drive the water level detection. The water level switch is connected in series in the excitation circuit of the outputs of K3 and K4, serving as a water level status acquisition device. When the water level is normal, the switch is open, and there is no current in the circuit. When the accumulated water reaches the warning level, the switch closes, and current flows into the primary light-emitting terminal of the optocoupler U1. The optocoupler U1 is a strong-weak current isolation device. Its secondary side is powered by a 5V power supply through a 470Ω pull-up resistor R14. R15 (10KΩ) and capacitor C1 (10uF) form an RC filter circuit to filter out noise interference from the sampling line and stably output the water level switch detection signal to the main chip pin, thus fully realizing the detection function. Figure 5 The water level signal optical coupler isolation detection module 50 has signal conversion and isolation functions.

[0102] Optionally, the main chip acts as the system control center, transmitting and receiving all signals bidirectionally: it outputs control signals A and B to control the mains power switching relays K1 and K2, and simultaneously sends signal C generated by the NOR gate U2 to adjust the power supply for water level detection; internally, it receives the water level detection level signal output by the optocoupler and executes the whole machine control logic such as drainage, shutdown, and overload protection according to the water level status.

[0103] based on Figure 6 The system architecture shown allows the main chip to execute the following control logic: 1) When the unit is first powered on, or when the power supply to the unit changes, the unit performs input power level detection. During the input power level detection, the two input relay circuits K1 and K2 of the power transformer L1 must be disconnected to avoid excessive output voltage due to mismatch between the input voltage and the relay connection. At this time, the main chip outputs control signals A and B, both at a low level "0". According to Table 1, control signal C is at a high level "1". When control signal C is at a high level "1", transistors Q3 and Q4 are turned on, and single-pole double-throw relays K3 and K4 are turned on. The switches of single-pole double-throw relays K3 and K4 are energized to the other end, that is, pins 1 and 3 of single-pole double-throw relays K3 and K4 are turned on, forming a 5V-water level switch-optocoupler U1 primary-GND loop. At this time, the water level detection loop is a 5V voltage detection. When the water level is normal, the water level switch (i.e., float switch) is in the open state. Therefore, the circuit from 5V—water level switch—primary stage of optocoupler U1—GND is also open, and the secondary stage of optocoupler U1 is not conducting. The main chip detects a low-level water level switch detection signal. When the water is full, the water level switch (i.e., float switch) conducts. Therefore, the circuit from 5V—water level switch—primary stage of optocoupler U1—GND is also conducting, and the secondary stage of optocoupler U1 is conducting. The main chip detects a high-level water level switch detection signal. Upon receiving the high-level signal, the main chip issues commands to start the water pump to drain water and shut down the compressor fan. The air conditioner is then turned on after the water level returns to normal.

[0104] Table 1, which contains the logical relationships between control signals A, B, and C, is shown below: Table 1

[0105] (2) After the input power detection is completed and the input power voltage is confirmed to be 115VAC or 230VAC, the main chip turns on the input circuit of the power transformer L1 through control signal A and control signal B.

[0106] When the input power supply voltage is 115VAC, the main chip outputs control signal B as high level "1" and control signal A as low level "0". Relay K2 is turned on and relay K1 is turned off. The power transformer inputs 115VAC and normally outputs 24VAC.

[0107] When control signal B is high ("1") and control signal A is low ("0"), according to Table 1, control signal C is low ("0"). Single-pole double-throw relays K3 and K4 are disconnected. At this time, K3 and K4 are in their default state, meaning pins 2 and 4 of K3 and K4 are conducting, forming a loop of 24VAC_L – water level switch – optocoupler U1 primary – 24VAC_N. The water level detection loop at this time is a 24VAC voltage detection. When the water level is normal, the water level switch (i.e., the float switch) is in the open state, and the loop of 24VAC_L – water level switch – optocoupler U1 primary – 24VAC_N is also open. The secondary winding of optocoupler U1 is not conducting, and the main chip detects a low-level water level switch detection signal. When the water level is full, the water level switch (i.e., float switch) is turned on. The circuit from 24VAC_L to water level switch to primary of optocoupler U1 to 24VAC_N is also turned on. The secondary side of optocoupler U1 is turned on, and the main chip detects that the water level switch detection signal is high. Upon receiving the high-level signal, the main chip issues commands to start the water pump to drain water and to turn off the compressor fan. The air conditioner is turned on after the water level returns to normal.

[0108] When the input power supply voltage is 230VAC, the main chip outputs control signal B as high level "0" and control signal A as low level "1". Relay K1 is turned on and relay K2 is turned off. The power transformer inputs 230VAC and normally outputs 24VAC.

[0109] When control signal B is high ("0") and control signal A is low ("1"), according to Table 1, control signal C is low ("0"). Single-pole double-throw relays K3 and K4 are disconnected. At this time, K3 and K4 are in their default state, meaning pins 2 and 4 of K3 and K4 are conducting, forming a loop of 24VAC_L – water level switch – optocoupler U1 primary – 24VAC_N. The water level detection loop at this time uses 24VAC voltage detection. When the water level is normal, the water level switch (i.e., the float switch) is in the open state, and the loop of 24VAC_L – water level switch – optocoupler U1 primary – 24VAC_N is also open. The secondary winding of optocoupler U1 is not conducting, and the main chip detects a low-level water level switch detection signal. When the water level is full, the water level switch (i.e., float switch) is turned on. The circuit from 24VAC_L to water level switch to primary of optocoupler U1 to 24VAC_N is also turned on. The secondary side of optocoupler U1 is turned on, and the main chip detects that the water level switch detection signal is high. Upon receiving the high-level signal, the main chip issues commands to start the water pump to drain water and to turn off the compressor fan. The air conditioner is turned on after the water level returns to normal.

[0110] The water level detection circuit switches to the 5V voltage loop only when the unit is powered off or when the input power supply voltage changes, triggering a power supply voltage check. This switch is short-lived. Under other normal operating conditions, the water level detection circuit uses 24VAC. This ensures the stability of the water level detection circuit while preventing false protection issues caused by power supply detection in multi-power residential units.

[0111] Furthermore, for ease of understanding Figure 6 The circuit shown below illustrates its function in an air conditioning system. The following is a schematic diagram of the connection relationship between the air conditioning power control system and the main board of the indoor unit of the air conditioner.

[0112] See Figure 7 This is a schematic diagram of the structure of an indoor unit mainboard water level detection system for an air conditioner, provided in an embodiment of this application. Figure 7 As shown, the indoor unit's mainboard water level detection system may include: power supply filtering, rectifier bridge, switching power supply, voltage conversion, relay control circuit, power transformer, water level detection, and main chip.

[0113] The power supply filter is used to suppress EMI. The rectifier bridge rectifies the AC input voltage into a high-voltage DC voltage. The switching power supply converts the rectified high-voltage DC voltage into a low-voltage DC voltage. The voltage converter further converts the low-voltage DC voltage output by the switching power supply into a suitable operating voltage for the main chip, etc. The relay control circuit is used to control the appropriate AC input voltage to the tap matched with the power transformer. The power transformer is used to output AC 24VAC voltage, which is mainly used to power the thermostat and as the excitation signal for water level detection. The switching power supply can operate normally with an input AC voltage range of 85VAC~265VAC. That is, the dual-power residential unit can be directly connected to 115VAC or 230VAC. Under these two voltages, the switching power supply can output a fixed low-voltage DC voltage. Therefore, the indoor unit motherboard can work normally regardless of the voltage. The 24VAC voltage is obtained by external power transformer transformation. However, different input power supplies need to be connected to different taps of the power transformer. By controlling the on and off of the relay, different power supplies can be connected to different taps of the power transformer, thereby outputting the 24VAC voltage required by the residential unit.

[0114] Furthermore, based on Figure 6 The air conditioning power control system shown includes components K1, K2, Q1, Q2, R3, R4, R5, and R6. Figure 7 In the relay control circuit, D2, R17, R16, K3, K4, Q3, Q4, R9, R10, R11, R12, U1, R14, R15, C1, and U2 belong to... Figure 7 The water level detection circuit and the other two parts constitute the air conditioning power control system provided in this application.

[0115] See Figure 8 This is a block diagram illustrating an embodiment of an air conditioner power control device provided in this application. As one embodiment, Figure 8 The device shown can be applied to Figures 1-3 , Figures 5-7 Any of the air conditioning power control systems shown. For example... Figure 8 As shown, the device may include: Status acquisition module 81 is used to acquire the voltage input status of the power input terminal; The control module 82 is used to control the connection status of the power relay control module and the system power supply relay control module in the air conditioning power control system according to the voltage input status, so as to supply power to the water level detection module through the power transformer module or the backup power module.

[0116] like Figure 9 The diagram shown is a structural schematic of an air conditioning device according to an embodiment of this application, including a processor 91, a communication interface 92, a memory 93, a communication bus 94, and an air conditioning power control system 100. The processor 91, communication interface 92, and memory 93 communicate with each other via the communication bus 94. Memory 93 is used to store computer programs; Air conditioner power control system 100, for Figures 1-3 The air conditioning power control system 100 described in any one of 5 to 7.

[0117] In one embodiment of this application, when the processor 91 executes the program stored in the memory 93, it implements the air conditioner power control method provided in any of the foregoing method embodiments, including: Obtain the voltage input status of the power input terminal; Based on the voltage input state, the connection state of the power relay control module and the system power supply relay control module in the air conditioning power control system is controlled so as to supply power to the water level detection module through the power transformer module or the backup power module.

[0118] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the air conditioner power control method provided in any of the foregoing method embodiments.

[0119] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0120] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0121] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0122] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. 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 the invention. Therefore, the present invention 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 power control system, characterized in that, The air conditioning power control system includes: a power input terminal, at least two different power relay control modules, a power transformer module, a backup power module, a system power supply relay control module, a water level detection module, and a main control module. The power input terminal is connected to the input terminal of each of the power relay control modules. The output terminal of each power relay control module is connected to the input terminal of the power transformer module; the output terminal of the power transformer module is connected to the input terminal of the system power supply relay control module; the power transformer module is used to output a first preset voltage; at least two power relay control modules correspond to different input voltages respectively. The output terminal of the backup power module is connected to the input terminal of the system power supply relay control module; the backup power module is used to output a second preset voltage. The output terminal of the system power supply relay control module is connected to the input terminal of the water level detection module; The output terminal of the water level detection module is connected to the input terminal of the main control module, and the output terminal of the main control module is connected to the power relay control module and the system power supply relay control module respectively.

2. The air conditioning power control system according to claim 1, characterized in that, The power relay control module includes a first power relay control module and a second power relay control module. The input terminals of the first power relay control module and the second power relay control module are both connected to the power input terminal; The output terminal of the first power relay control module is connected to the first voltage tap of the power transformer module. The output terminal of the second power relay control module is connected to the second voltage tap of the power transformer module; the first voltage tap and the second voltage tap are different, and the voltage output by the power transformer module is less than the input voltage of the power input terminal.

3. The air conditioning power control system according to claim 2, characterized in that, The main control module is used to output a first control signal, a second control signal, and a third control signal; The first control signal is used to control the on / off state of the first power relay control module, the second control signal is used to control the on / off state of the second power relay control module, and the third control signal is used to control the switching of the system power supply relay control module. The third control signal is obtained by logical operation of the first control signal and the second control signal: when both the first control signal and the second control signal are low, the third control signal is high, and the system power supply relay control module switches to the backup power supply module. When one of the first control signal and the second control signal is high, and the third control signal is low, the system power supply relay control module switches to the power transformer module.

4. The air conditioning power control system according to claim 3, characterized in that, The first power relay control module includes a first relay and a first drive circuit connected in series, and the second power relay control module includes a second relay and a second drive circuit connected in series. The first driving circuit includes a first switching transistor, the control terminal of the first switching transistor receives the first control signal, the first conducting terminal of the first switching transistor is connected to the coil of the first relay, and the second conducting terminal of the first switching transistor is grounded, for driving the first relay to switch on and off according to the first control signal; The second driving circuit includes a second switching transistor. The control terminal of the second switching transistor receives the second control signal. The first conducting terminal of the second switching transistor is connected to the coil of the second relay, and the second conducting terminal of the second switching transistor is grounded. It is used to drive the second relay to switch on and off according to the second control signal.

5. The air conditioning power control system according to claim 1, characterized in that, The system power supply relay control module includes a first switching branch and a second switching branch; The first switching branch is connected between the first output terminal of the power transformer module and the first output terminal of the backup power module, and the output terminal of the first switching branch is connected to the first input terminal of the water level detection module. The second switching branch is connected between the second output terminal of the power transformer module and the second output terminal of the backup power module, and the output terminal of the second switching branch is connected to the second input terminal of the water level detection module. The first switching branch and the second switching branch switch synchronously.

6. The air conditioning power control system according to claim 5, characterized in that, The system power supply relay control module includes a third relay and a fourth relay; Both the third and fourth relays are single-pole double-throw relays and are synchronously driven by the same control signal; The normally closed terminal of the third relay is connected to the first output terminal of the power transformer module, the normally open terminal is connected to the first output terminal of the backup power module, and the common terminal is connected to the first input terminal of the water level detection module. The normally closed terminal of the fourth relay is connected to the second output terminal of the power transformer module, the normally open terminal is connected to the second output terminal of the backup power module, and the common terminal is connected to the second input terminal of the water level detection module.

7. The air conditioning power control system according to claim 5, characterized in that, The water level detection module includes a water level switch and an optocoupler; The output terminal of the first switching branch is connected to the first terminal of the water level switch, and the second terminal of the water level switch is connected to the first terminal of the primary side of the optocoupler; the water level switch is a normally open reed switch, which is open when the water level is normal and closed when the water is full. The output of the second switching branch is connected to the second terminal of the primary side of the optocoupler; The secondary side of the optocoupler is connected to the input terminal of the main control module; the optocoupler is used to convert the on / off state of the water level switch into a level signal that the main control module can recognize, and to prevent the second preset voltage of the backup power module from flowing back to the output terminal of the power transformer module when the system power supply relay control module switches to the backup power module.

8. An air conditioner power supply control method, characterized in that, The method, applied to the air conditioning power control system according to any one of claims 1 to 7, comprises: Obtain the voltage input status of the power input terminal; Based on the voltage input state, the connection state of the power relay control module and the system power supply relay control module in the air conditioning power control system is controlled so as to supply power to the water level detection module through the power transformer module or the backup power module.

9. The method according to claim 8, characterized in that, The step of obtaining the voltage input state of the power input terminal includes: Detect the input voltage at the power input terminal; When the unit is detected to be powered on or the input voltage changes, the voltage input state of the power input terminal is determined to be a voltage detection state. If the input voltage at the power input terminal is detected to be any preset voltage value, the voltage input state of the power input terminal is determined to be a voltage determination state.

10. The method according to claim 9, characterized in that, Based on the voltage input state, the connection state of the power relay control module and the system power supply relay control module within the air conditioning power control system is controlled, including: When the voltage input state is in voltage detection state, the power relay control module is controlled to disconnect, causing the power transformer module to stop outputting the first preset voltage. At the same time, the system power supply relay control module is controlled to switch to the backup power module, and the backup power module provides the second preset voltage to the water level detection module. When the voltage input state is a voltage-determined state, the current input voltage value of the power input terminal is obtained; the power relay control module corresponding to the voltage value is controlled to turn on, so that the power transformer module resumes outputting the first preset voltage, and at the same time, the system power supply relay control module is controlled to switch to the power transformer module, so that the power transformer module provides the first preset voltage to the water level detection module.

11. The method according to any one of claims 8 to 10, characterized in that, The power relay control module includes a first power relay control module and a second power relay control module; controlling the connection status of the power relay control module and the system power supply relay control module within the air conditioning power control system includes: Output a first control signal and a second control signal to control the on / off state of the first power relay control module and the second power relay control module, respectively; A third control signal is generated based on the level states of the first and second control signals; When both the first control signal and the second control signal are low, the third control signal is high, controlling the system power supply relay control module to switch to the backup power supply module; When one of the first control signal and the second control signal is high, the third control signal is low, controlling the system power supply relay control module to switch to the power transformer module.

12. The method according to claim 8, characterized in that, The water level detection module of the air conditioning power control system includes a water level switch and an optocoupler, and the method further includes: The level signal is received through the secondary side of the optocoupler; When the level signal is high, it is determined that the water level switch is turned on, and the water level in the receiving tray is full. When the level signal is low, it is determined that the water level switch is open, and the water level in the receiving tray is in a normal state.

13. The method according to claim 12, characterized in that, After determining that the water level in the receiving tray is full, the process also includes: Output drainage control commands to control the start of the drainage pump, and / or output shutdown protection commands to control the compressor and / or fan to shut down; After the water level switch returns to the open state, a recovery command is output to control the compressor and / or the fan to restart.

14. An air conditioner power control device, characterized in that, The device is applied to the air conditioning power control system according to any one of claims 1 to 7, the device comprising: The status acquisition module is used to acquire the voltage input status of the power input terminal; The control module is used to control the connection status of the power relay control module and the system power supply relay control module in the air conditioning power control system according to the voltage input status, so as to supply power to the water level detection module through the power transformer module or the backup power module.

15. An air conditioning device, characterized in that, include: Air conditioning power control system, processor, communication interface, memory and communication bus; Wherein, the air conditioner power control system is the air conditioner power control system according to any one of claims 1 to 7; The processor, communication interface, and memory communicate with each other via a communication bus; the memory is used to store computer programs; the processor is used to execute the computer program to implement the air conditioner power control method according to any one of claims 8-13.

16. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the air conditioning power control method according to any one of claims 8-13.

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