Air conditioner safety control system and method, air conditioner and medium

Abstract

The invention discloses an air conditioner safety control system and method, an air conditioner and a medium, and the air conditioner safety control system adopts a voltage conversion unit to provide direct current which is always lower than a safety voltage threshold value for an indoor air conditioner, and constructs a leakage response unit independently driven by a detection controller; the refrigerant sensor is used for monitoring the concentration change in real time, when the concentration exceeds the standard, the pressure regulating actuator is triggered to execute the gradual change pressure drop operation, the electric spark generation risk existing in a traditional air conditioner using an R290 refrigerant is reduced, meanwhile, the alarm unit is maintained to work continuously to ensure full-period safety warning, and the anti-explosion safety of the R290 air conditioner is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent air conditioning, and in particular to an air conditioner safety control system and method, an air conditioner, and a medium. BACKGROUND

[0002] R290 is propane, a natural hydrocarbon refrigerant, which does not contain chlorine atoms and does not destroy the ozone layer compared with Freon, an artificially synthesized refrigerant. Compared with traditional refrigerants such as R410A, R290 refrigerant has significant advantages in energy efficiency, environmental protection, thermodynamic performance, and cost. In the context of environmental protection and sustainable development, the higher energy efficiency ratio and lower GWP of R290 refrigerant make it have broad prospects. Air conditioner safety control system, method, air conditioner and medium

[0003] However, R290 refrigerant has the characteristics of flammability and explosiveness. When the refrigerant leaks and accumulates in the air conditioning unit, it is easy to explode under the action of high-energy sparks in the external environment and internal components of the air conditioner when the concentration reaches the explosion limit. In particular, the indoor air conditioner of the split wall-mounted machine is installed indoors, and the ventilation environment is poorer compared with the voltage conversion unit. After the refrigerant leaks, it is more likely to accumulate. The current power supply of the indoor air conditioner is high voltage, and the energy is high when an electric spark is generated, so it is easy to explode after R290 refrigerant leaks. Therefore, there is an urgent need for an air conditioner safety control system to solve the problem of insufficient explosion safety of air conditioners using R290 refrigerant when the refrigerant leaks in the prior art. SUMMARY

[0004] Embodiments of the present application provide an air conditioner safety control system, method, air conditioner and medium, which aims to solve the problem of insufficient explosion safety of air conditioners using R290 refrigerant when the refrigerant leaks in the prior art.

[0005] In a first aspect, the embodiments of the present application provide an air conditioner safety control system, comprising: an indoor air conditioner; a voltage conversion unit physically isolated from the indoor air conditioner, the voltage conversion unit comprising a first power supply module electrically connected to the indoor air conditioner, the first power supply module being configured to output direct current less than a safety voltage threshold to the indoor air conditioner; a first controller connected to the indoor air conditioner and the first power supply module, the first controller being configured to control the operation of the indoor air conditioner; a leakage response unit comprising a detection controller, a refrigerant sensor, an alarm unit and a pressure regulating actuator, the detection controller being connected to and driving the refrigerant sensor, the alarm unit and the pressure regulating actuator, the pressure regulating actuator being connected to and controlling the first power supply module, wherein the detection controller is configured to trigger the pressure regulating actuator to perform a gradual pressure drop and maintain the alarm unit in continuous operation when the refrigerant concentration exceeds the standard.

[0006] In a second aspect, the embodiment of the present application further provides an air conditioner safety control method, which is applied to the air conditioner safety control system as described above, and the method comprises the following steps: continuously monitoring the refrigerant concentration in the space where the indoor air conditioner is located through the refrigerant sensor; when the refrigerant concentration exceeds a first threshold value, controlling the alarm unit to continuously alarm; obtaining the working state of the indoor air conditioner; and based on the refrigerant concentration and the working state of the indoor air conditioner, performing voltage regulation on the indoor unit of the air conditioner according to a preset rule through the voltage regulator according to a plurality of threshold intervals.

[0007] In a third aspect, the embodiment of the present application further provides an air conditioner, which comprises a memory and a processor connected to the memory; the memory is used to store a computer program; and the processor is used to run the computer program stored in the memory to execute the steps of the method according to any one of the above.

[0008] In a fourth aspect, the embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and the computer program comprises program instructions, which can realize the steps of the air conditioner safety control method when executed by a processor.

[0009] Compared with the prior art, the present application has the following beneficial effects:

[0010] In the technical solution of the present application, the air conditioner safety control system provides direct current whose voltage is always lower than the safety voltage threshold to the indoor air conditioner through the voltage conversion unit, and builds a leakage response unit which is independently driven by the detection controller, and uses the refrigerant sensor to monitor the concentration change in real time, and triggers the voltage regulator to perform the gradual voltage drop operation when the concentration exceeds the threshold, thereby reducing the risk of electric spark generated by the air conditioner using R290 refrigerant, and at the same time maintaining the continuous operation of the alarm unit to ensure the whole cycle safety warning, and improving the explosion-proof safety of the R290 air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0012] Figure 1 The circuit connection schematic diagram of the air conditioner safety control system provided by the present application;

[0013] Figure 2 The flowchart of the air conditioner safety control method provided by the present application;

[0014] Figure 3A first sub-flow chart of the air conditioner safety control method provided by the present application is shown in FIG. 1.

[0015] Figure 4 A second sub-flow chart of the air conditioner safety control method provided by the present application is shown in FIG. 2.

[0016] Figure 5 A schematic block diagram of the air conditioner provided by the present application is shown in FIG. 3.

[0017] Legend of reference signs:

[0018] 10, indoor air conditioner; 11, first controller; 12, direct current motor; 13, detection controller; 14, refrigerant sensor; 15, alarm unit;

[0019] 20, voltage conversion unit; 21, general controller; 22, first power supply module; 23, first switch; 24, second power supply module; 25, second switch. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0021] It should be understood that, when used in the present specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0022] It should also be understood that the terms used in the present specification and the appended claims are only for the purpose of describing the embodiments and are not intended to limit the present application. As used in the present specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should be further understood that the term "and / or" used in the present specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0024] The present application discloses an air conditioner safety control system to solve the problem of insufficient explosion safety of an air conditioner using R290 refrigerant when the refrigerant leaks in the prior art. Referring to Figure 1The air conditioner safety control system comprises an indoor air conditioner 10; a voltage conversion unit 20 physically isolated from the indoor air conditioner 10, the voltage conversion unit 20 comprising a first power supply module 22 electrically connected to the indoor air conditioner 10, the first power supply module 22 being used to output direct current less than a safety voltage threshold to the indoor air conditioner 10; a first controller 11 connected to the indoor air conditioner 10 and the first power supply module 22, the first controller 11 being used to control the indoor air conditioner 10 to operate; a leakage response unit comprising a detection controller 13, a refrigerant sensor 14, an alarm unit 15 and a pressure regulating actuator (not shown in the figure), the detection controller 13 being connected to and driving the refrigerant sensor 14, the alarm unit 15 and the pressure regulating actuator, the pressure regulating actuator being connected to and controlling the first power supply module 22, wherein the detection controller 13 is used to trigger the pressure regulating actuator to perform a gradual pressure drop and maintain the alarm unit 15 to continuously work when the refrigerant concentration exceeds the standard.

[0025] The indoor air conditioner 10 comprises a cross-flow fan blade, a direct current motor 12, a display panel, a stepping motor and other components. Among them, the direct current motor 12 is used to drive the cross-flow fan blade to ensure the circulation of indoor air. The power supply of the indoor air conditioner 10 is controlled by the first controller 11 to ensure the normal operation of each component. The voltage conversion unit 20 is physically isolated from the indoor air conditioner 10 to ensure that the power supply system of the indoor air conditioner 10 will not be directly affected even when the refrigerant leaks. The voltage conversion unit 20 comprises a first power supply module 22, which is electrically connected to the indoor air conditioner 10 through the indoor-outdoor unit connection line. The first power supply module 22 converts the high-voltage direct current provided by the outdoor unit into 48V direct current less than the safety voltage threshold and outputs it to the indoor air conditioner 10. The 48V direct current belongs to the safety voltage range, which significantly reduces the risk of electric spark generated by the indoor air conditioner 10 when the refrigerant leaks. The first controller 11 is connected to the indoor air conditioner 10 and the first power supply module 22 and is responsible for controlling the operation of the indoor air conditioner 10. The first controller 11 comprises a 48V direct current input, which is converted into 12V and 5V by a voltage stabilizing unit to supply power to other components in the indoor air conditioner 10. In the normal working state, the first controller 11 ensures the normal operation of the direct current motor 12, and the cross-flow fan blade maintains an appropriate speed to ensure the circulation of indoor air. In addition, the first controller 11 also communicates with the third controller of the outdoor unit to obtain and send control signals in real time, ensuring the coordinated operation of the system.

[0026] The leakage response unit is the key part of the system, including the detection controller 13, the refrigerant sensor 14, the alarm unit 15 and the pressure regulating actuator. The detection controller 13 is connected with the refrigerant sensor 14, the alarm unit 15 and the pressure regulating actuator, responsible for receiving the detection signal of the refrigerant sensor 14, and controlling the work of the pressure regulating actuator and the alarm unit 15 according to the signal. The refrigerant sensor 14 is installed at a proper position of the indoor air conditioner 10, used for real-time detection of the concentration of R290 refrigerant in indoor air. The detection range and sensitivity of the refrigerant sensor 14 should meet the national standard, to ensure that the signal can be sent in time when the refrigerant concentration exceeds the standard. The refrigerant sensor 14 is connected with the detection controller 13, and transmits the detection data in real time through the communication interface. The alarm unit 15 includes a buzzer and an indicator light, used to alarm the user when the refrigerant concentration exceeds the standard. The buzzer emits high-frequency sound, and the indicator light flashes, to ensure that the user can pay attention to the abnormal situation in time. The alarm unit 15 is independently powered by the detection controller 13, to ensure that it can still work continuously and continuously alarm after the indoor air conditioner 10 is powered off. The pressure regulating actuator is connected with the first power supply module 22, and gradually reduces the voltage according to the instruction of the detection controller 13. When the refrigerant sensor 14 detects that the refrigerant concentration exceeds the set value, the detection controller 13 will trigger the pressure regulating actuator to gradually reduce the output voltage of the first power supply module 22. The pressure regulating actuator realizes the gradual reduction of the voltage by controlling the first power supply module 22. After the voltage is reduced to 0V, the power supply of the indoor air conditioner 10 is completely cut off, to avoid the generation of electric spark when the voltage suddenly changes.

[0027] Through the above-mentioned embodiments, the application provides an effective air conditioner safety control system, which significantly improves the explosion-proof safety of the air conditioner using R290 refrigerant when the refrigerant leaks through the cooperative work of 48V direct current power supply and leakage response unit, to ensure the safety of users and maintenance personnel.

[0028] In an embodiment, the indoor air conditioner 10 is provided with a wide voltage DC motor 12 connected to the first power supply module 22, which can operate at a voltage lower than the safety voltage threshold. In this embodiment, the DC motor 12 of the indoor air conditioner 10 is a wide voltage DC motor 12 for driving the cross-flow fan blade. The wide voltage DC motor 12 is a permanent magnet DC motor 12, which has the advantages of high efficiency, low noise, fast response speed, etc. The motor is provided with a Hall sensor for detecting the position of the motor rotor, ensuring that the motor can still operate stably at low voltage. The characteristic of this motor is that it can operate normally within a wide voltage range, especially at a voltage lower than the safety voltage threshold. Specifically, the voltage range of the wide voltage DC motor 12 is 0V to 48V, ensuring that it can maintain effective ventilation under different working conditions. The maximum operating voltage is 48V, which ensures that sufficient air volume can be provided under normal working conditions. When the refrigerant concentration exceeds the standard, the wide voltage DC motor 12 can operate at 12V or lower, ensuring that the cross-flow fan blade continues to ventilate at low speed and prevents refrigerant accumulation. The wide voltage DC motor 12 is connected to the first power supply module 22 through a drive circuit. The first power supply module 22 directly outputs 48V DC power to supply power to the wide voltage DC motor 12. Through the cooperative work of the wide voltage DC motor 12 and the first power supply module 22, the explosion-proof safety of the indoor air conditioner 10 in the event of refrigerant leakage is ensured, significantly improving the reliability of the system and the safety of the user.

[0029] In specific use, when the air conditioner is in normal working condition, the first power supply module 22 outputs 48V DC power, which is provided to the wide voltage DC motor 12 through the drive circuit. The motor operates normally at 48V voltage, driving the cross-flow fan blade to work at a high speed, ensuring indoor air circulation. When the refrigerant sensor 14 detects that the refrigerant concentration exceeds the first set value, the detection controller 13 triggers the voltage regulating actuator to gradually reduce the output voltage of the first power supply module 22. The voltage regulating actuator controls the switching state of the first relay to gradually reduce the output voltage of the first power supply module 22 from 48V to 12V. At this time, the wide voltage DC motor 12 operates at low speed at 12V voltage, and the cross-flow fan blade continues to ventilate to prevent refrigerant accumulation. When the refrigerant concentration exceeds the second set value, the voltage regulating actuator immediately executes voltage reduction to 0V and disconnects the first relay, completely cutting off the power supply of the indoor air conditioner 10. At this time, the wide voltage DC motor 12 stops working, but the refrigerant sensor 14 and the alarm unit 15 are still independently powered by the detection controller 13 and continue to work, ensuring the safety of the user and the maintenance personnel.

[0030] In addition, in order to further improve the safety of the system, a temperature detection function is added to the motor control strategy. By installing a temperature sensor, the temperature of the motor and the cross-flow fan blade is monitored in real time, ensuring that the motor does not overheat when refrigerant leaks, further reducing the safety risk.

[0031] In an embodiment, the voltage conversion unit 20 further comprises a second power supply module 24, which is electrically connected with the detection controller 13, and the detection controller 13 is physically isolated from the first controller 11. The second power supply module 24 is electrically connected with the detection controller 13. The main function of the second power supply module 24 is to provide stable power supply for the detection controller 13, to ensure its continuous operation when the refrigerant leaks. The input voltage of the second power supply module 24 also comes from the high-voltage DC power provided by the outdoor unit, which is converted to 12V or 24V DC power by the internal conversion circuit and output to the detection controller 13. Specifically, the input voltage of the second power supply module 24 is the high-voltage DC power provided by the outdoor unit, usually 300V to 400V, and the second power supply module 24 is internally provided with a DC-DC converter to convert the high-voltage DC power to 12V or 24V DC power. The conversion circuit includes a voltage stabilizing unit and a filtering unit to ensure the stability and purity of the output voltage. The 12V or 24V DC power belongs to the safe voltage range, which ensures that the refrigerant sensor 14 connected to the detection controller 13, which is in direct contact with the refrigerant, will not have the risk of generating high-voltage electric sparks when the refrigerant leaks.

[0032] The detection controller 13 is responsible for receiving the detection signal of the refrigerant sensor 14 and controlling the operation of the pressure regulating actuator and the alarm unit 15 according to the signal. The detection controller 13 is physically isolated from the first controller 11, to ensure that it will not be affected by the indoor air conditioner 10 when the refrigerant leaks. The detection controller 13 is built-in with a microprocessor, which is responsible for processing the detection signal of the refrigerant sensor 14. When the refrigerant sensor 14 detects that the concentration of the refrigerant exceeds the set value, the microprocessor will trigger the pressure regulating actuator to perform the gradual pressure drop, and control the alarm unit 15 to work continuously. The detection controller 13 is connected with the refrigerant sensor 14, the alarm unit 15 and the pressure regulating actuator through a communication interface, to ensure real-time transmission of signals. The communication interface can adopt RS485 or CAN bus, supporting multipoint communication, to ensure the reliability and expandability of the system. The detection controller 13 is physically isolated from the first controller 11, to ensure that the detection controller 13 can work independently when the refrigerant leaks, and is not affected by the indoor air conditioner 10. The specific physical isolation can be that the detection controller 13 is not in the space where the indoor air conditioner 10 works. In addition, the detection controller 13 is equipped with fault diagnosis and self-checking functions, to periodically check the power supply and signal transmission state of itself, to discover and report faults in time, and to ensure the stable operation of the system.

[0033] In an embodiment, the voltage conversion unit 20 further comprises a first switch 23 connected between the first power supply module 22 and the first controller 11. The first switch 23 is connected between the first power supply module 22 and the first controller 11, and its main function is to quickly cut off the connection between the first power supply module 22 and the first controller 11 when refrigerant leakage occurs, ensuring that the power supply of the indoor air conditioner 10 is completely disconnected, and preventing electric sparks from occurring when the voltage suddenly changes. Specifically, the first switch 23 is a solid-state relay (SSR) that has the advantages of fast response speed, no mechanical wear, long service life, etc. The solid-state relay controls its on-off state through an electrical signal, ensuring that it can respond quickly when refrigerant leakage is detected. One end of the first switch 23 is connected to the output end of the first power supply module 22, and the other end is connected to the input end of the first controller 11. The first switch 23 is connected to the first power supply module 22 and the first controller 11 through a dedicated connection cable, ensuring the reliability and stability of signal transmission. The control signal of the first switch 23 is provided by the detection controller 13. When the detection controller 13 detects that the refrigerant concentration exceeds the standard, it will send a control signal to the first switch 23 to disconnect the connection between the first power supply module 22 and the first controller 11. The control circuit of the first switch 23 includes a signal amplifier and a driving circuit to ensure reliable transmission and execution of the control signal. In addition, to further improve the reliability of the system, a redundant design is provided in the control circuit of the first switch 23. For example, a dual-channel control signal is used to ensure that when a single-channel signal fails, the other channel signal can still work normally.

[0034] In an embodiment, the air conditioner safety control system further comprises a total controller 21 connected with the first controller 11 and the detection controller 13 through an isolated communication bus. The total controller 21 is the core control unit in the air conditioner safety control system, responsible for coordinating and managing the operation of the entire system. The total controller 21 is connected with the first controller 11 and the detection controller 13 through an isolated communication bus, ensuring reliable and safe communication between parts. The total controller 21 uses a high-performance microprocessor with multi-task processing capability, supporting real-time data processing and control. The microprocessor is integrated with a communication interface, a data storage unit and a control logic unit, ensuring efficient operation of the system. The communication between the total controller 21 and the first controller 11 and the detection controller 13 uses an isolated communication bus, ensuring the reliability and safety of signal transmission. The isolated communication bus can use RS485 or CAN bus, supporting multi-point communication, with the advantages of strong anti-interference ability and long transmission distance. The isolation module uses an optoelectronic coupler or a transformer to ensure that no electric spark is generated during signal transmission, improving the explosion-proof performance of the system. The communication between the total controller 21 and the first controller 11 and the detection controller 13 uses a standard communication protocol, such as Modbus or CANopen, ensuring the standardization and compatibility of data transmission. The communication protocol supports multiple data types, including control instructions, status information and fault diagnosis data, ensuring comprehensive monitoring and management of the system.

[0035] Further, the total controller 21 is also equipped with a wireless communication module, such as a Wi-Fi or 4G / 5G module, connected with a remote monitoring system through the Internet. The remote monitoring system can monitor the working state, refrigerant concentration and alarm state of the indoor air conditioner 10 in real time, supporting remote maintenance and fault diagnosis. The remote monitoring system can generate detailed operation reports and fault logs, helping users and maintenance personnel to understand the system status in time, improving the maintenance efficiency of the system. The total controller 21 is also equipped with an intelligent diagnosis module, which analyzes the operation data of the system through machine learning algorithms to predict potential faults and abnormal conditions. The intelligent diagnosis module can monitor the operation state of the refrigerant sensor 14, the first controller 11 and the detection controller 13 in real time, discover and report faults in advance, ensuring stable operation of the system. The intelligent diagnosis module also generates maintenance suggestions and optimization schemes to help users and maintenance personnel perform preventive maintenance, prolonging the service life of the system.

[0036] The detection controller 13 and the second power supply module 24 are also provided with a second switch 25 for powering off all components under the air conditioner safety control system, especially the leakage response unit, from the voltage conversion unit 20 side in extreme cases.

[0037] The application also provides an air conditioner safety control method applied to the air conditioner safety control system in the above embodiments, which is described with reference toFigure 2 The air conditioner safety control method comprises the following steps:

[0038] S110, continuously monitoring the refrigerant concentration in the space where the indoor air conditioner is located through the refrigerant sensor;

[0039] S120, when the refrigerant concentration exceeds the first threshold value, controlling the alarm unit to continuously alarm;

[0040] S130, obtaining the working state of the indoor air conditioner;

[0041] S140, based on the refrigerant concentration and the working state of the indoor air conditioner, the voltage of the indoor unit is regulated by the pressure regulating actuator according to the preset multiple threshold intervals and the preset regulation.

[0042] The refrigerant sensor 14 is installed near the indoor air conditioner 10, and the concentration of R290 refrigerant in the air is detected and transmitted to the detection controller 13. The refrigerant sensor 14 continuously monitors the refrigerant concentration at a frequency of once per second. The first threshold value is set as the upper limit of the concentration of R290 refrigerant. When the refrigerant concentration is detected to exceed the first threshold value, the indicator light of the alarm unit 15 flashes, warning the user. In this process, the alarm unit 15 will continuously alarm until the refrigerant concentration drops below the first threshold value or the system is reset. The detection controller 13 obtains the current working state of the indoor air conditioner 10 from the first controller 11 through the isolation communication bus, and processes the obtained working state data of the indoor air conditioner 10 and stores it in the internal data storage unit for subsequent voltage regulation. In order to avoid sparks as much as possible to improve safety, multiple refrigerant concentration threshold intervals can be preset, each interval corresponding to a different voltage regulation strategy. The detection controller 13 controls the output voltage of the first power supply module 22 according to the refrigerant concentration and the working state of the indoor air conditioner 10, and according to the different voltage regulation strategies corresponding to the refrigerant concentration interval. The detection controller 13 continuously monitors the refrigerant concentration and the working state of the indoor air conditioner 10, and dynamically adjusts the voltage regulation strategy according to the changes, to ensure the safety and reliability of the system.

[0043] In an embodiment, with reference to Figure 3 , the step S140 comprises:

[0044] S141, when the indoor air conditioner is in a running state and the refrigerant concentration is between the first threshold value and the second threshold value, the voltage of the indoor air conditioner is reduced to the minimum working voltage for maintaining the wide voltage DC motor to work for ventilation through the pressure regulating actuator, wherein the second threshold value is greater than the first threshold value;

[0045] S142, when the indoor air conditioner is in the off state and the refrigerant concentration is between the first threshold value and the second threshold value, the voltage of the indoor air conditioner is raised to the minimum working voltage of the wide voltage DC motor for ventilation work by the voltage regulating actuator.

[0046] The refrigerant sensor 14 continuously monitors the refrigerant concentration in the space where the indoor air conditioner 10 is located, and transmits the detection data to the detection controller 13 through the isolated communication bus. The detection controller 13 obtains the current working state of the indoor air conditioner 10 from the first controller 11 through the isolated communication bus, and confirms that the air conditioner is in operation. The detection controller 13 determines whether the refrigerant concentration is between the first threshold value and the second threshold value.

[0047] Specifically, assuming that the first threshold value is set to 30% LEL and the second threshold value is set to 50% LEL. When the refrigerant concentration is between 30% LEL and 50% LEL, if it is determined that the indoor air conditioner 10 is running, the detection controller 13 gradually reduces the output voltage of the first power supply module 22 to the minimum working voltage of the wide voltage DC motor 12 for ventilation work through the voltage regulating actuator. The minimum working voltage of the wide voltage DC motor 12 is 12V, at which the motor can run at low speed to continue ventilation and prevent refrigerant accumulation.

[0048] Similarly, when the refrigerant concentration is between 30% LEL and 50% LEL, if it is determined that the indoor air conditioner 10 is not running, the detection controller 13 gradually raises the output voltage of the first power supply module 22 to the minimum working voltage of the wide voltage DC motor 12 for ventilation work through the voltage regulating actuator. At this time, the motor can run at low speed to continue ventilation and prevent refrigerant accumulation.

[0049] In an embodiment, with reference to Figure 4 , the air conditioner safety control method further comprises:

[0050] S150, after a predetermined length of time, again determining the threshold interval in which the refrigerant concentration is located

[0051] S160a, when the refrigerant concentration is lower than the first threshold value, controlling the voltage of the indoor air conditioner to continuously decrease to zero voltage at a predetermined voltage decrease rate through the voltage regulating actuator, and then disconnecting the first switch;

[0052] S160b, when the refrigerant concentration is higher than the second threshold value, controlling the alarm unit to perform emergency alarm, and disconnecting the first switch.

[0053] After the refrigerant concentration exceeds the first threshold value and triggers the alarm, the system needs to determine the threshold interval of the refrigerant concentration again after a preset time length to make further adjustment control. The preset time length can be set according to the actual application scene and system requirements, for example, 10 minutes or 15 minutes. The purpose of the preset time length is to give the user enough time to take measures, such as opening the window for ventilation, turning off the refrigerant source, etc., to reduce the refrigerant concentration. After the end of the preset time length, the refrigerant sensor 14 continues to monitor the refrigerant concentration in the space where the indoor air conditioner 10 is located, and transmits the detection data to the detection controller 13 through the isolated communication bus. The detection controller 13 determines whether the refrigerant concentration is lower than the first threshold value or higher than the second threshold value according to the latest refrigerant concentration data.

[0054] When the refrigerant concentration is lower than the first threshold value, the detection controller 13 controls the output voltage of the first power supply module 22 through the voltage regulating actuator to gradually reduce to zero voltage at a preset voltage reduction speed. The voltage regulating actuator realizes the gradual reduction of voltage by controlling the on-off state of the first relay. When the voltage is reduced to zero voltage, the detection controller 13 sends a control instruction to the first controller 11 through the isolated communication bus to make it disconnect the first switch 23, completely cutting off the power supply of the indoor air conditioner 10. The disconnection of the first switch 23 ensures that the indoor air conditioner 10 completely stops running, preventing further diffusion of refrigerant.

[0055] When the refrigerant concentration is higher than the second threshold value, the detection controller 13 sends a control instruction to the alarm unit 15 through the isolated communication bus to make it perform emergency alarm. The emergency alarm includes high-frequency sound of the buzzer and flashing of the indicator light, which sends an emergency alarm to the user, prompting the user to take immediate action. At the same time, the detection controller 13 sends a control instruction to the first controller 11 through the isolated communication bus to make it disconnect the first switch 23, completely cutting off the power supply of the indoor air conditioner 10. The disconnection of the first switch 23 ensures that the indoor air conditioner 10 completely stops running, preventing further diffusion of refrigerant and potential explosion risk.

[0056] Please refer to Figure 5 , Figure 5 is a schematic block diagram of an air conditioner provided by an embodiment of the present application. The air conditioner can be understood as a computer device 500. The computer device 500 can be a terminal or a server, wherein the terminal can be a desktop computer, a tablet computer, a smart phone, etc. The server can be a standalone server or a server cluster composed of multiple servers.

[0057] Please refer to Figure 5 The computer device 500 includes a processor 502, a memory, and a network interface 505 connected through a system bus 501, wherein the memory can include a non-volatile storage medium 503 and an internal memory 504.

[0058] The non-volatile storage medium 503 can store an operating system 5031 and a computer program 5032. The computer program 5032 includes program instructions which, when executed, can cause the processor 502 to perform an air conditioner safety control method.

[0059] The processor 502 is configured to provide computing and control capabilities to support the operation of the entire computer device 500.

[0060] The non-volatile storage medium 503 provides an environment for the computer program 5032 to run, and the computer program 5032, when executed by the processor 502, can cause the processor 502 to perform an air conditioner safety control method.

[0061] The network interface 505 is configured to perform network communication with other devices. Those skilled in the art can understand that the network interface 505 can be configured to perform wired or wireless communication with the network. Figure 5 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device 500 to which the scheme of the present application is applied. The specific computer device 500 can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0062] The processor 502 is configured to run the computer program 5032 stored in the memory to implement the steps of the above method.

[0063] It should be understood that, in the embodiments of the present application, the processor 502 can be a central processing unit (CPU), and the processor 502 can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0064] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiments of the method can be completed by a computer program instructing related hardware. The computer program includes program instructions, and the computer program can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the above-mentioned embodiments of the method.

[0065] Therefore, the present application also provides a storage medium. The storage medium can be a computer readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. The program instructions are executed by a processor to make the processor execute the steps of the above method.

[0066] The storage medium can be a U disk, a mobile hard disk, a Read-Only Memory (ROM), a magnetic disk or an optical disk, and various computer readable storage media that can store program codes.

[0067] Those skilled in the art can understand that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of the examples have been described in the above description in general terms. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0068] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of each unit is only a logical function division, and actual implementation can have another division manner. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0069] The steps in the method embodiments of the present application can be adjusted, combined and deleted in sequence according to actual needs. The units in the device embodiments of the present application can be combined, divided and deleted according to actual needs. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0070] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a storage medium. Based on such understanding, the technical solutions of the present application essentially or say the parts that make contributions to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions for making a computer device (which can be a personal computer, a terminal or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.

[0071] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An air conditioning safety control system, characterized in that, include: Indoor air conditioning; The voltage conversion unit is physically isolated from the indoor air conditioner. The voltage conversion unit includes a first power supply module that is electrically connected to the indoor air conditioner. The first power supply module is used to output DC power less than a safe voltage threshold to the indoor air conditioner. A first controller is connected to the indoor air conditioner and the first power supply module. The first controller is used to control the operation of the indoor air conditioner. The leakage response unit includes a detection controller, a refrigerant sensor, an alarm unit, and a pressure regulating actuator. The detection controller is connected to and drives the refrigerant sensor, the alarm unit, and the pressure regulating actuator. The pressure regulating actuator is connected to and controls the first power supply module. The detection controller is used to trigger the pressure regulating actuator to perform a gradual pressure drop and maintain the continuous operation of the alarm unit when the refrigerant concentration exceeds the standard.

2. The air conditioning safety control system according to claim 1, characterized in that, The indoor air conditioner is equipped with a wide-voltage DC motor, which is connected to the first power supply module. The wide-voltage DC motor can operate at a voltage lower than the safe voltage threshold.

3. The air conditioning safety control system according to claim 2, characterized in that, The voltage conversion unit further includes a second power supply module, which is electrically connected to the detection controller, and the detection controller is physically isolated from the first controller.

4. The air conditioning safety control system according to claim 3, characterized in that, The voltage conversion unit further includes a first switch, which is connected between the first power supply module and the first controller.

5. The air conditioning safety control system according to claim 3, characterized in that, It also includes a central controller, which is connected to the first controller and the detection controller respectively via an isolated communication bus.

6. An air conditioning safety control method, characterized in that, The method, applied to an air conditioning safety control system as described in any one of claims 1 to 4, comprises: The refrigerant sensor continuously monitors the refrigerant concentration in the space where the indoor air conditioner is located; When the refrigerant concentration exceeds the first threshold, the alarm unit is controlled to continuously sound an alarm. Obtain the operating status of the indoor air conditioner; Based on the refrigerant concentration and the operating state of the indoor air conditioner, the voltage of the indoor unit of the air conditioner is regulated by the voltage regulator according to preset rules within multiple preset threshold ranges.

7. The air conditioning safety control method according to claim 6, characterized in that, The step of regulating the voltage of the indoor air conditioner unit according to preset rules through the voltage regulating actuator based on the refrigerant concentration and the operating state of the indoor air conditioner, according to multiple preset threshold ranges, includes: When the indoor air conditioner is in operation and the refrigerant concentration is between the first threshold and the second threshold, the voltage of the indoor air conditioner is reduced to the minimum operating voltage required to maintain the ventilation operation of the wide-voltage DC motor by the voltage regulating actuator, wherein the second threshold is greater than the first threshold; When the indoor air conditioner is off and the refrigerant concentration is between the first threshold and the second threshold, the voltage of the indoor air conditioner is increased to the minimum operating voltage required to maintain the ventilation operation of the wide-voltage DC motor by the voltage regulating actuator.

8. The air conditioning safety control method according to claim 7, characterized in that, The method further includes: After a preset time period, the threshold range in which the refrigerant concentration falls is determined again. When the refrigerant concentration is lower than the first threshold, the voltage of the indoor air conditioner is controlled by the voltage regulator to continuously reduce to zero voltage at a preset voltage reduction rate, and then the first switch is disconnected; When the refrigerant concentration is higher than the second threshold, the alarm unit is controlled to issue an emergency alarm and the first switch is disconnected.

9. An air conditioner, characterized in that, The air conditioner includes a memory and a processor connected to the memory; the memory is used to store a computer program; the processor is used to run the computer program stored in the memory to perform the steps of the method as described in any one of claims 6 to 8.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which includes program instructions that, when executed by a processor, can implement the steps of the method as described in any one of claims 6 to 8.

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