Air conditioning system and control method of air conditioning system

Abstract

The invention discloses an air conditioning system and a control method of the air conditioning system, relates to the technical field of air conditioners, and can avoid the problem of device burnout caused by improper start-stop time sequence of each module in the air conditioning system. The air conditioning system comprises an outdoor unit; the driving module is used for controlling on-off of a circuit in the air conditioning system and the operation state of the outdoor unit; the power factor correction module is used for improving a power factor between the power supply and the outdoor unit; the main control module is configured to respond to a received state change instruction and determine a state change sequence of the driving module and the power factor correction module based on the state change instruction; the state change instruction is used for indicating the outdoor unit to start running or stop running; and according to the state change sequence, the driving module and the power factor correction module are controlled to sequentially carry out state change, so that the outdoor unit starts running or stops running.

Description

Technical Field

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

[0002] With the continuous growth of global energy demand and increasing environmental awareness, improving the energy efficiency of power systems and reducing harmonic pollution have become important issues in the field of power electronics technology. Power factor correction (PFC) technology, due to its ability to improve the power factor of power systems and reduce reactive power transmission, has been widely used in many power electronic devices. Therefore, in the air conditioning industry, there is also a need to develop driver boards with PFC functionality to drive air conditioning systems.

[0003] In related technologies, the PFC module and the drive module do not communicate directly. Instead, the main control module is used as a communication relay hub to apply the PFC function to the outdoor unit of the air conditioning system.

[0004] However, because the PFC module uses a common topology, its rectifier diodes have relatively poor surge protection. If the air conditioning system experiences a power outage and subsequent power-on, the input voltage will rise from low to high, causing a large charging current in the bus capacitor. This charging current could potentially damage the PFC module's rectifier diodes. Using more surge-resistant rectifier diodes would increase the manufacturing cost of the driver board. Therefore, how to prevent component burnout without increasing the driver board's manufacturing cost is a pressing issue that needs to be addressed. Summary of the Invention

[0005] The embodiments of this application provide an air conditioning system and a control method for the air conditioning system, which solves the problem of component burnout caused by improper start-up and shutdown sequence of various modules within the air conditioning system.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, embodiments of this application provide an air conditioning system, including: an outdoor unit; a drive module for controlling the on / off state of circuits within the air conditioning system and the operating state of the outdoor unit; a power factor correction module for improving the power factor between the power supply and the outdoor unit; and a main control module configured to: in response to receiving a state change instruction, determine the state change sequence of the drive module and the power factor correction module based on the state change instruction; the state change instruction is used to instruct the outdoor unit to start or stop operating; and control the drive module and the power factor correction module to sequentially change their states according to the state change sequence, so as to start or stop the outdoor unit from operating.

[0008] The technical solution provided in this application provides at least the following beneficial effects: The state change sequence of the drive module and the power factor correction module is determined by state change instructions. After the drive module and the power factor correction module undergo state changes according to the state change sequence, the outdoor unit of the air conditioning system is then controlled to operate. Therefore, by controlling the state change sequence of the drive module and the power factor correction module, not only is the operation of the drive module and the power factor correction module guaranteed, but damage to components of the air conditioning system is also avoided, reducing potential safety hazards during use.

[0009] In the first implementation of the first aspect, when the state change instruction is a power-on instruction, the state change sequence is: the drive module controls the internal circuit of the air conditioning system to be turned on, the power factor correction module works, and the drive module controls the outdoor unit to start running.

[0010] The air conditioning system provided in this application determines the state change sequence of the drive module and the power factor correction module when the outdoor unit starts running, so that the state changes of the drive module and the power factor correction module can meet the control requirements of the air conditioning system.

[0011] In the second implementation of the first aspect, the aforementioned control drive module and power factor correction module sequentially change state, including: sending a circuit conduction command to the drive module so that the drive module controls the circuit in the air conditioning system to conduct; controlling the power factor correction module to start working; determining the target operating frequency of the outdoor unit according to the target operating state indicated in the start-up command, and sending the target operating frequency to the drive module so that the drive module controls the outdoor unit to operate based on the target operating frequency.

[0012] The air conditioning system provided in this application embodiment, when the outdoor unit starts running, the main control module controls the drive module and the power factor correction module to change their states sequentially, ensuring that the power factor correction module is in working state before the outdoor unit starts running, so as to achieve the purpose of reducing reactive power and improving the energy efficiency of the air conditioning system.

[0013] In the third implementation of the first aspect, the above-mentioned control of the power factor correction module to start working includes: sending a first voltage flag bit to the power factor correction module; the first voltage flag bit is used to indicate that the control of the power factor correction module to start working; the above-mentioned determination of the target operating frequency of the outdoor unit according to the target operating state indicated in the power-on command includes: upon receiving the first target flag bit returned by the power factor correction module, determining that the power factor correction module is in a working state, and determining the target operating frequency of the outdoor unit according to the target operating state indicated in the power-on command.

[0014] The air conditioning system provided in this application embodiment ensures that the power factor correction module is in working condition before the outdoor unit starts operating by sending a first voltage flag bit to the power factor correction module and receiving a first target flag bit returned by the power factor correction module.

[0015] In the fourth implementation of the first aspect, sending the first voltage flag bit to the power factor correction module includes: sending an enable bit to the power factor correction module; the enable bit is used to indicate that the power factor correction module is in the start state; and sending the first voltage flag bit to the power factor correction module.

[0016] In the air conditioning system provided in this application embodiment, the power factor correction module must be in an activated state before it can function in the system. Therefore, this application controls the power factor correction module to start first and then operate by sending an enable bit to the power factor correction module.

[0017] In the fifth implementation of the first aspect, when the state change instruction is a shutdown instruction, the state change sequence is: the drive module controls the outdoor unit to stop running, the power factor correction module is turned off, and the drive module controls the internal circuit of the air conditioning system to be turned off.

[0018] The air conditioning system provided in this application determines the state change sequence of the drive module and the power factor correction module when the outdoor unit stops running, so that the state changes of the drive module and the power factor correction module can not only meet the control requirements of the air conditioning system, but also avoid burning out the components.

[0019] In the sixth implementation of the first aspect, the aforementioned control drive module and power factor correction module sequentially change state, including: sending a shutdown command to the drive module to cause the drive module to control the outdoor unit to stop running; controlling the power factor correction module to turn off; and sending a circuit shutdown command to the drive module to cause the drive module to control the circuit inside the air conditioning system to disconnect.

[0020] The air conditioning system provided in this application embodiment, when the outdoor unit stops running, the main control module controls the drive module and the power factor correction module to change their states in sequence, ensuring that the circuit inside the air conditioning system is still in a conductive state before the operating frequency of the outdoor unit is not zero, thereby avoiding the safety hazard of burning out components.

[0021] In the seventh implementation of the first aspect, the aforementioned control power factor correction module is turned off, including: sending a second voltage flag bit to the power factor correction module; the second voltage flag bit is used to indicate that the control power factor correction module stops working.

[0022] The air conditioning system provided in this application embodiment, when the outdoor unit stops running, the main control module sends a second voltage flag to the power factor correction module to control the power factor correction module to shut down, so as to avoid damage to the power factor correction module when the air conditioning system experiences a power outage and power-on.

[0023] In the eighth implementation of the first aspect, the aforementioned control of the power factor correction module to be turned off includes: sending a second voltage flag to the power factor correction module when the current in the internal circuit of the air conditioner is less than a first threshold and a second target flag returned by the power factor correction module is received.

[0024] The air conditioning system provided in this application embodiment actively shuts down the power factor correction module by detecting the current in the circuit when the outdoor unit stops running, thus avoiding damage to the power factor correction module when the air conditioning system experiences a power outage and subsequent power restoration.

[0025] Secondly, embodiments of this application provide a control method for an air conditioning system, comprising: responding to receiving a state change instruction, determining the state change sequence of a drive module and a power factor correction module based on the state change instruction; the state change instruction being used to instruct the outdoor unit to start or stop operation; and controlling the drive module and the power factor correction module to sequentially perform state changes according to the state change sequence, so as to cause the outdoor unit to start or stop operation.

[0026] Thirdly, embodiments of this application provide a control device for an air conditioning system, comprising: a determining module, configured to determine the state change sequence of a drive module and a power factor correction module based on a received state change instruction; the state change instruction is used to instruct the outdoor unit to start or stop operation; and a processing module, configured to control the drive module and the power factor correction module to sequentially change state according to the state change sequence, so as to cause the outdoor unit to start or stop operation.

[0027] Fourthly, embodiments of this application provide a controller, including: one or more processors; one or more memories; wherein the one or more memories are used to store computer program code, the computer program code including computer instructions, and when the one or more processors execute the computer instructions, the controller executes any of the air conditioning system control methods provided in the second aspect.

[0028] Fifthly, embodiments of this application provide a computer-readable storage medium including computer instructions that, when executed on a computer, cause the computer to perform the methods provided in the first aspect and possible implementations of the first aspect.

[0029] In a sixth aspect, embodiments of this application provide a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement the methods provided in the first aspect and possible implementations of the first aspect.

[0030] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the controller's processor or may be packaged separately from the controller's processor; this application does not impose any limitations on this.

[0031] The beneficial effects described in aspects two through six of this application can be referred to the analysis of the beneficial effects of aspect one, and will not be repeated here. Attached Figure Description

[0032] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0033] Figure 1 This is a schematic diagram of the structure of an air conditioning system provided in an embodiment of this application;

[0034] Figure 2 A hardware configuration block diagram of an air conditioning system provided in an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the circuit structure of an air conditioning system provided in an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the circuit structure of another air conditioning system provided in an embodiment of this application;

[0037] Figure 5 A flowchart illustrating a control method for an air conditioning system provided in an embodiment of this application;

[0038] Figure 6 A flowchart illustrating another control method for an air conditioning system provided in an embodiment of this application;

[0039] Figure 7 A flowchart illustrating another control method for an air conditioning system provided in an embodiment of this application;

[0040] Figure 8 A schematic diagram illustrating the interaction process of a main control module, a drive module, and a power factor correction module provided in an embodiment of this application;

[0041] Figure 9A timing diagram illustrating the start-up process of an outdoor unit, provided as an embodiment of this application;

[0042] Figure 10 A flowchart illustrating another control method for an air conditioning system provided in an embodiment of this application;

[0043] Figure 11 A schematic diagram illustrating the interaction process of another main control module, drive module, and power factor correction module provided in an embodiment of this application;

[0044] Figure 12 A timing diagram illustrating the process of an outdoor unit stopping operation, provided as an embodiment of this application;

[0045] Figure 13 A timing diagram illustrating a control method for an air conditioning system provided in an embodiment of this application;

[0046] Figure 14 This is a schematic diagram of the structure of a control device for an air conditioning system provided in an embodiment of this application. Detailed Implementation

[0047] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0048] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines or channels, the terms "connection" and "linkage" as used in this application have the meaning of establishing electrical conductivity. The specific meaning needs to be understood in conjunction with the context.

[0051] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0052] With the continuous growth of global energy demand and increasing environmental awareness, improving the energy efficiency of power systems and reducing harmonic pollution have become important issues in the field of power electronics technology. Power factor correction (PFC) technology, due to its ability to improve the power factor of power systems and reduce reactive power transmission, has been widely used in many power electronic devices. Therefore, in the air conditioning industry, there is also a need to develop driver boards with PFC functionality to drive the operation of air conditioning systems.

[0053] In related technologies, the power factor correction module and the drive module do not communicate directly. Instead, the main control module is used as a communication relay hub to apply the power factor correction function to the outdoor unit of the air conditioning system.

[0054] However, because the power factor correction module uses a common topology, its rectifier diodes have relatively poor surge protection. If the air conditioning system experiences a power outage and subsequent power-on, the input voltage will rise from low to high, causing a large charging current in the bus capacitor. This charging current could potentially damage the rectifier diodes of the PFC module. Using more surge-resistant rectifier diodes would increase the manufacturing cost of the driver board.

[0055] Therefore, how to avoid component burnout without increasing the manufacturing cost of the driver board is an urgent problem to be solved.

[0056] Based on this, embodiments of this application provide an air conditioning system and a control method for the air conditioning system. The method determines the state change sequence of the drive module and the power factor correction module through state change commands, controls the drive module and the power factor correction module to undergo state changes according to the state change sequence, and then controls the operation of the outdoor unit of the air conditioning system. Therefore, by controlling the state change sequence of the drive module and the power factor correction module, not only is the operation of the drive module and the power factor correction module guaranteed, but damage to components of the air conditioning system can also be avoided, reducing safety hazards during use.

[0057] The embodiments provided in this application will now be described in detail with reference to the accompanying drawings.

[0058] Figure 1 This is a schematic diagram of the structure of an air conditioning system provided in an embodiment of this application, such as... Figure 1 As shown, the air conditioning system 1 includes an air conditioner 2.

[0059] It should be noted that the air conditioner can be a multi-split air conditioner, a central air conditioner, etc., and this application does not limit the type of air conditioner.

[0060] As a feasible implementation method, the air conditioning system 1 and the remote control 5 are connected by communication.

[0061] As a feasible implementation method, the air conditioner 2 includes an outdoor unit 3, which is usually installed outdoors and used for heat exchange in the indoor environment.

[0062] In some embodiments, the air conditioner 2 includes an indoor unit 4.

[0063] As a feasible implementation method, indoor unit 4, taking indoor wall-mounted units as an example, is typically installed on indoor walls (such as in bedrooms, living rooms, conference rooms, etc.). Another example is indoor floor-standing units (…). Figure 1 (Not shown in the image) is also a type of indoor unit.

[0064] It should be noted that indoor unit 4 may include at least one indoor unit, and this application does not limit the number of indoor units of the air conditioner.

[0065] Figure 2 This is a hardware configuration block diagram of an air conditioning system provided in an embodiment of this application. For example... Figure 2 As shown, the air conditioning system 1 may also include: a controller 1000.

[0066] In some embodiments, the controller 1000 is the control center of the air conditioning system 1, which connects various parts of the air conditioning system 1 through various interfaces and lines, and executes various programs of the air conditioning system by running or executing programs stored in the memory and calling data stored in the memory.

[0067] In some embodiments, the controller 1000 may include one or more processing units 1001.

[0068] In some embodiments, controller 1000 refers to a device that can generate operation control signals according to state change instructions, instructing the air conditioner 2 in the air conditioning system 1 to execute a control method. Exemplarily, controller 1000 can be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Controller 1000 can also be other devices with processing functions, such as circuits, devices, or software modules; this application embodiment does not impose any limitations on this.

[0069] In addition, the controller 1000 can be used to control the various components inside the air conditioning system 1 so that each component can perform the predetermined functions of the air conditioning system 1.

[0070] In some embodiments, such as Figure 2 As shown, the controller 1000 includes a communicator 1002.

[0071] In some embodiments, the communicator 1002 is used to establish communication connections with other network entities, such as establishing communication connections with terminal devices. The communicator 1002 may include a radio frequency (RF) module, a cellular module, a wireless fidelity (WIFI) module, and a GPS module, etc. Taking an RF module as an example, the RF module can be used for signal reception and transmission; specifically, it sends received information to the controller 1000 for processing; additionally, it transmits signals generated by the controller 1000. Typically, the RF circuit may include, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier (LNA), a duplexer, etc.

[0072] In some embodiments, such as Figure 2 As shown, the controller 1000 also includes a memory 1003.

[0073] In some embodiments, the memory 1003 may be used to store software programs and data. The controller 1000 executes various functions of the air conditioning system 1 and data processing by running the software programs or data stored in the memory 1003. The memory 1003 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. The memory 1003 stores an operating system that enables the air conditioning system 1 to run. In this application, the memory 1003 may store the operating system and various application programs, and may also store code that executes the control method of the air conditioning system 1 provided in the embodiments of this application.

[0074] Those skilled in the art will understand that Figure 2 The hardware structure shown does not constitute a limitation on the air conditioning system 1. The air conditioning system 1 may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0075] As a feasible implementation method, the air conditioning system 1 communicates with the remote controller 5 through the communicator 1002.

[0076] In some embodiments, the remote controller 5 has the function of communicating with the controller 1000, for example, using infrared or other communication methods. Users can set various operating parameters of the air conditioner 2 via the remote controller 5.

[0077] In other embodiments, the air conditioning system control method provided in this application is applied to the control device of the air conditioning system. The control device can be a personal computer (PC), laptop computer, mobile device, tablet computer, or other similar device. This application does not limit the specific form of the electronic device. Alternatively, the control device can be a single server or a server cluster consisting of multiple servers. In some implementations, the server cluster can be a distributed cluster server. This application does not impose any limitations on this.

[0078] Figure 3 This is a schematic diagram of the circuit structure of an air conditioning system provided in an embodiment of this application, such as... Figure 3 As shown, the air conditioning system includes: an outdoor unit, a main control module, a drive module, and a power factor correction module.

[0079] In some embodiments, the main control module is responsible for determining the target operating frequency of the outdoor unit. The main control module sends the target operating frequency to the drive module. Upon receiving the drive module, it drives the outdoor unit to operate and then monitors the actual operating frequency of the outdoor unit in real time, sending the data back to the main control module. The main control module compares the target operating frequency with the actual operating frequency and controls the outdoor unit to increase or decrease the frequency. The power factor correction module is used to improve the power factor between the power supply and the outdoor unit. The power factor correction module communicates with the main control module and the drive module to apply the power factor correction function to the outdoor unit.

[0080] The operating frequency of the outdoor unit may include the operating frequency of the compressor. In this application, the operating frequency of the compressor will be used as an example for detailed explanation.

[0081] In some embodiments, such as Figure 4 As shown, in Figure 3 In addition to the above, the air conditioning system also includes: a main relay, a starting resistor, and a bus capacitor. The main relay is controlled by a drive module and is used to control the on / off state of the circuits within the air conditioning system. The starting resistor charges the bus capacitor when the air conditioning system is first powered on. Without a starting resistor, the bus capacitor would be essentially short-circuited due to its characteristics, which could cause it to explode and create a safety hazard.

[0082] Figure 5 This is a schematic flowchart of a control method for an air conditioning system provided in an embodiment of this application, as shown below. Figure 5 As shown, the method includes the following steps:

[0083] S501. In response to receiving a state change command, determine the state change sequence of the drive module and the power factor correction module based on the state change command.

[0084] Among them, the status change command is used to instruct the outdoor unit to start or stop running.

[0085] In some embodiments, the state change instruction can be a control instruction issued by the user.

[0086] In other embodiments, the air conditioning system is equipped with a detection device. During the operation of the air conditioning system, some operating parameters may become abnormal, which can affect the operation of the air conditioning system. Therefore, when the air conditioning system is in operation, the detection device can monitor the operating parameters of the air conditioning system in real time, and send a status change command to the main control module when the operating parameters become abnormal, thereby causing the outdoor unit to stop operating.

[0087] For example, the air conditioning system has a high pressure alarm device. When the pressure is higher than the set value, the high pressure switch will be disconnected. The drive module will detect that the circuit is not open, and will stop driving the outdoor unit, stopping the load, and sending an alarm code to the main control module. When the main control module receives the alarm code sent by the drive module, it will also stop the input of the required frequency, so that the machine has no operating requirement from the output end.

[0088] In some embodiments, since the power factor correction module provides power factor correction function and can improve the power factor between the power supply and the outdoor unit, in order to improve the energy efficiency of the air conditioning system, the power factor correction module needs to be in the activated state before the outdoor unit starts running.

[0089] Therefore, as a feasible implementation method, when the state change command is the power-on command, the state change sequence is as follows: the drive module controls the internal circuit of the air conditioning system to be turned on, the power factor correction module works, and the drive module controls the outdoor unit to start running.

[0090] It can be seen that by controlling the sequence of state changes when the air conditioning system is turned on, the drive module and the power factor correction module can meet the control requirements of the air conditioning system while ensuring that the power factor correction module is in the started state when the state changes.

[0091] In some embodiments, if the actual operating frequency of the outdoor unit is not zero when the outdoor unit is stopped, and the main relay is already closed, the starting resistor in the air conditioning system circuit will burn out. Therefore, the main relay should be in the open state when the outdoor unit is still running to avoid burning out the starting resistor.

[0092] If the air conditioning system is in standby mode, the outdoor unit's actual operating frequency is 0, and the opening or closing state of the main relay will not affect the system's operation. However, if the main relay is on, and the air conditioning system experiences a power outage and subsequent power restoration, the circuit's input voltage will rise from low to high. This will generate a large charging current in the bus capacitor, which could potentially damage the rectifier diodes of the PFC module. Therefore, once the actual operating frequency reaches 0, the relay is turned off, disconnecting the air conditioning system circuit and improving its safety.

[0093] Therefore, as a feasible implementation method, when the state change instruction is a shutdown instruction, the state change sequence is as follows: the drive module controls the outdoor unit to stop running, the power factor correction module is turned off, and the drive module controls the internal circuit of the air conditioning system to be turned off.

[0094] It can be seen that by controlling the sequence of state changes when the air conditioning system is turned off, the drive module and power factor correction module can not only meet the control requirements of the air conditioning system when changing state, but also avoid burning out components, thus improving the safety of the air conditioning system.

[0095] S502. According to the sequence of state changes, the control drive module and power factor correction module change their states sequentially to start or stop the outdoor unit from running.

[0096] As one possible implementation, when the status change command instructs the outdoor unit to start running, the system sequentially controls the circuit to be turned on, the power factor correction module to work, and the outdoor unit to start running according to the status change sequence corresponding to the start command.

[0097] As another possible implementation, when the status change command instructs the outdoor unit to stop running, the system sequentially controls the outdoor unit to stop running, the power factor correction module to shut down, and the internal circuit of the air conditioning system to be turned off according to the status change sequence corresponding to the shutdown command.

[0098] As can be seen from S501-S502, the air conditioning system control method provided in this application determines the state change sequence of the drive module and the power factor correction module through state change instructions. After controlling the drive module and the power factor correction module to perform state changes according to the state change sequence, the outdoor unit of the air conditioning system is then controlled to operate. Therefore, by controlling the state change sequence of the drive module and the power factor correction module, not only is the operation of the drive module and the power factor correction module guaranteed, but damage to the components of the air conditioning system can also be avoided, reducing safety hazards during use.

[0099] In some embodiments, when the outdoor unit starts running, the main control module control circuit is turned on first, then the power factor correction module starts working, and finally the outdoor unit starts running. This ensures that the power factor correction module is in working condition before the outdoor unit starts running, thereby improving the energy efficiency of the air conditioning system.

[0100] Based on this, as a feasible implementation method, refer to Figure 6 When the outdoor unit starts running, the above S502 may include the following steps:

[0101] S601. Send a circuit turn-on command to the drive module so that the drive module controls the circuit in the air conditioning system to turn on.

[0102] It is important to understand that in the air conditioning system of this application, the main relay is used to control the on / off state of the circuit within the air conditioning system; that is, when the main relay is closed, the circuit within the air conditioning system is disconnected, and when the main relay is open, the circuit within the air conditioning system is connected. The drive module determines the opening or closing of the main relay based on the switch flag bit of the main relay in the circuit connection command sent by the main control module. The switch flag bit ON indicates that the main relay needs to be opened, and the switch flag bit OFF indicates that the main relay needs to be closed. Therefore, the main control module sends the switch flag bit ON of the main relay to the drive module. After receiving the switch flag bit ON, the drive module controls the main relay to open, at which point the circuit is connected.

[0103] At the same time, the drive module can monitor the status of the main relay. After the main relay is turned on, the drive module sends the main relay operation flag ON to the main control module, indicating that the circuit in the air conditioning system has been turned on and the main control module can control the operation of the outdoor unit.

[0104] S602, The power factor correction module starts working.

[0105] It is important to understand that in order for the power factor correction module to function, it should be in a working state before the outdoor unit is put into operation.

[0106] S603. Based on the target operating state indicated in the power-on command, determine the target operating frequency of the outdoor unit and send the target operating frequency to the drive module so that the drive module controls the operation of the outdoor unit based on the target operating frequency.

[0107] The target operating status may include information such as the air conditioner's operating mode and set temperature.

[0108] The main control module determines the target operating frequency of the outdoor unit based on the air conditioner's operating mode, set temperature, and other information, and sends the target operating frequency to the drive module. The drive module controls the outdoor unit to operate based on the target operating frequency so that the outdoor unit can be in the target operating state.

[0109] It should be noted that although the drive module controls the outdoor unit's operation at a target operating frequency to achieve optimal cooling or heating performance, in actual operation, due to various factors (such as changes in ambient temperature, load fluctuations, compressor wear, etc.), the actual operating frequency may deviate from the target frequency. Therefore, the drive module can monitor the outdoor unit's actual operating frequency in real time and send it to the main control module. The main control module will then adjust the target operating frequency according to the actual situation to ensure stable operation of the outdoor unit and optimal cooling or heating performance.

[0110] In some embodiments, a first voltage flag can be sent to the power factor correction module to control the power factor correction module to start working. By sending the first voltage flag to the power factor correction module and receiving the first target flag returned by the power factor correction module, it is determined whether the power factor correction module is in a working state, ensuring that the power factor correction module is in a working state before the outdoor unit starts operating.

[0111] Based on this, as a feasible implementation method, refer to Figure 7 When the outdoor unit starts running, the above S602 may include the following steps:

[0112] S701, Send the first voltage flag bit to the power factor correction module.

[0113] The first voltage flag is used to indicate that the power factor correction module has started working.

[0114] As one possible implementation, the main control module sends a first voltage flag to the power factor correction module. Upon receiving the first voltage flag, the power factor correction module is in the enabled state. However, the power factor correction module also requires the current in the air conditioning system's circuit to reach a first threshold to operate. Therefore, the power factor correction module can detect the current magnitude through its own functions, and it will start working once the current reaches the first threshold.

[0115] It should be understood that during the process of the main control module controlling the operation of the power factor correction module, the power factor correction module sends an operating status flag to the main control module. Before the power factor correction module starts, the operating status flag returned by the power factor correction module to the main control module is the third target flag bit; after the power factor correction module starts, the operating status flag returned by the power factor correction module to the main control module is the first target flag bit. Therefore, the main control module can determine the status of the power factor correction module based on the operating status flags returned by the power factor correction module.

[0116] As another possible implementation, before the power factor correction module starts working, it is also necessary to determine whether the power factor correction module is working. If it is working, the power factor correction module is turned on; if it is not working, the power factor correction module is turned off.

[0117] It should be noted that the enable bit is used to indicate that the power factor correction module is in the activated state. The main control module determines whether the power factor correction module needs to function by checking if it sends an enable bit. Without an enable bit, the power factor correction module is completely inactive. After determining that an enable bit is present, the main control module further determines whether it needs to operate by checking if it sends a first voltage flag bit. Therefore, the main control module sends an enable bit to the power factor correction module before sending the first voltage flag bit.

[0118] In some embodiments, in order to ensure that the power factor correction module is in working state when the outdoor unit starts running again, the target operating frequency of the outdoor unit can be determined after receiving the first target flag bit returned by the power factor correction module.

[0119] Based on, as a feasible implementation method, referring to Figure 7 The above S503 may include the following steps:

[0120] S702. Upon receiving the first target flag bit returned by the power factor correction module, determine that the power factor correction module is in working state, and determine the target operating frequency of the outdoor unit according to the target operating state indicated in the power-on command.

[0121] The following is combined Figure 8 The interaction process between the main control module, drive module, and power factor correction module during the initial operation of the outdoor unit is explained.

[0122] like Figure 8 As shown, the interaction process between the main control module, the drive module, and the power factor correction module includes:

[0123] S801, the main control module sends the main relay switch flag to the drive module.

[0124] S802, the drive module sends the main relay operation flag ON to the main control module.

[0125] S803, the main control module sends an enable bit to the power factor correction module.

[0126] S804, the main control module sends the first voltage flag bit to the power factor correction module.

[0127] S805, the power factor correction module sends the first target flag bit to the main control module.

[0128] S806, the main control module sends the target operating frequency to the driver module.

[0129] like Figure 9As shown, the interaction timing of the main control module, drive module, and power factor correction module when the outdoor unit starts running is as follows:

[0130] First, the main control module determines the target operating frequency of the outdoor unit based on operational requirements and sends the main relay switch flag to the drive module. Second, the main control module sends the enable bit and the first voltage flag bit to the power factor correction module. Finally, the main control module sends the target operating frequency to the drive module.

[0131] In some embodiments, when the outdoor unit stops running, the main control module first controls the outdoor unit to stop running, then controls the power factor correction module to shut down, and finally controls the circuit to disconnect, ensuring that the circuit inside the air conditioning system is still in a conductive state before the operating frequency of the outdoor unit is not zero, thereby avoiding the safety hazard of burning out components.

[0132] Based on this, as a feasible implementation method, refer to Figure 10 When the outdoor unit is not running, the above S502 may include the following steps:

[0133] S1001. Send a shutdown command to the drive module so that the drive module controls the outdoor unit to stop running.

[0134] S1002, Control power factor correction module to shut down.

[0135] As one possible implementation, the main control module sends a second voltage flag to the power factor correction module, which is used to instruct the power factor correction module to stop working.

[0136] As another possible implementation, when the outdoor unit stops operating, the current in the air conditioning system's internal circuitry will rapidly decrease. The power factor correction module detects this current, and when it drops to a certain threshold, the power factor correction module will stop functioning. Therefore, the main control module can send a second voltage flag to the power factor correction module when the current in the air conditioning's internal circuitry is less than the first threshold and when it receives the second target flag returned by the power factor correction module.

[0137] S1003. Send a circuit shutdown command to the drive module so that the drive module controls the circuit in the air conditioning system to disconnect.

[0138] It should be understood that in the air conditioning system of this application, the main relay is used to control the on / off state of the circuit within the air conditioning system. Therefore, the circuit shutdown command sent from the main control module to the drive module includes the OFF switch flag of the main relay. After receiving the OFF switch flag, the drive module controls the main relay to shut down.

[0139] Meanwhile, the drive module can monitor the status of the main relay. After the main relay is turned off, the drive module sends the main relay operation flag OFF to the main control module, indicating that the circuit in the air conditioning system has been turned off.

[0140] The following is combined Figure 11 The interaction process between the main control module, drive module, and power factor correction module when the outdoor unit is not in operation is explained.

[0141] like Figure 11 As shown, the interaction process between the main control module, the drive module, and the power factor correction module includes:

[0142] S1101, The main control module sends the outdoor unit's operating frequency of 0 to the drive module.

[0143] S1102, The main control module sends the main relay switch flag OFF to the drive module.

[0144] S1103, The main control module sends the second voltage flag bit to the power factor correction module.

[0145] S1104, The power factor correction module sends the second target flag bit to the main control module.

[0146] S1105, The drive module sends the main relay operation flag OFF to the main control module.

[0147] like Figure 12 As shown, the interaction timing of the main control module, drive module, and power factor correction module when the outdoor unit is stopped is as follows:

[0148] First, after 3 seconds, the main control module sends the main relay switch flag OFF to the drive module; or, if the actual operating frequency of the outdoor unit is detected to be 0 within 3 seconds, the main relay switch flag can be immediately OFF.

[0149] Secondly, after 2 seconds, the voltage flag PFCvolt is set to 0, or, if the operation flag received within 2 seconds is the second target flag 0x09, PFCvolt can be set to 0 immediately. When the PFC module receives the voltage flag PFCvolt = 0 from the master controller, the operation flag of the PFC module changes to the third target flag 0x25.

[0150] The following is combined Figure 13 The timing of the interaction process between the main control module, the drive module, and the power factor correction module is explained.

[0151] When the outdoor unit needs to operate:

[0152] First, the main control module determines the target operating frequency of the outdoor unit based on operational requirements and sends the main relay switch flag to ON to the drive module.

[0153] Specifically, the main control module should send the main relay switch flag to the drive module at a time no later than the moment the main control module determines the target operating frequency. Simultaneously, the drive module continuously monitors the status of the main relay and sends the main relay's operating flag to the main control module.

[0154] Secondly, the main control module sends an enable bit and a first voltage flag bit to the power factor correction module.

[0155] The first voltage flag can be PFCvolt = 0xA0.

[0156] It should be noted that the PFC module enable position can be turned ON when the outdoor unit needs to operate for the first time after the air conditioning system is powered on, and when the main relay has been turned on. The enable position will remain ON until the power is turned off.

[0157] Simultaneously, the power factor correction module will return an operation flag to the main control module, indicating that the power factor correction module is in working condition, and the operation flag is the first target flag. Figure 13 If the value in the value is not equal to 0x25, the power factor correction module is in a non-working state, and the operation flag is the third target flag bit, i.e. Figure 13 0x25 in the value.

[0158] Finally, the main control module sends the target operating frequency to the driver module.

[0159] It should be noted that due to various factors (such as changes in ambient temperature, load fluctuations, compressor wear, etc.), there is a deviation between the actual operating frequency Fi and the target operating frequency Ft of the outdoor unit during actual operation.

[0160] When the outdoor unit needs to be shut down:

[0161] First, after 3 seconds, the main control module sends the main relay switch flag OFF to the drive module; or, if the actual operating frequency of the outdoor unit is detected to be 0 within 3 seconds, the main relay switch flag can be immediately OFF.

[0162] Secondly, after 2 seconds, the voltage flag PFCvolt is set to 0, or, if the operation flag received within 2 seconds is the second target flag 0x09, PFCvolt can be set to 0 immediately. When the PFC module receives the voltage flag PFCvolt = 0 from the master controller, the operation flag of the PFC module changes to the third target flag 0x25.

[0163] Based on the control method of the air conditioning system mentioned in the above embodiments, this application also proposes an air conditioning system, including: an outdoor unit; a drive module, which controls the on / off state of the circuit within the air conditioning system and the operating state of the outdoor unit; a power factor correction module, which improves the power factor between the power supply and the outdoor unit; and a main control module configured to: respond to receiving a state change instruction, determine the state change sequence of the drive module and the power factor correction module based on the state change instruction; the state change instruction is used to instruct the outdoor unit to start or stop operating; and control the drive module and the power factor correction module to sequentially change their states according to the state change sequence, so that the outdoor unit starts or stops operating.

[0164] In some embodiments, when the state change instruction is a power-on instruction, the state change sequence is: the drive module controls the internal circuit of the air conditioning system to be turned on, the power factor correction module works, and the drive module controls the outdoor unit to start running.

[0165] In some embodiments, the control drive module and the power factor correction module sequentially change states, including: sending a circuit turn-on command to the drive module so that the drive module controls the circuit in the air conditioning system to turn on; controlling the power factor correction module to start working; determining the target operating frequency of the outdoor unit according to the target operating state indicated in the start-up command, and sending the target operating frequency to the drive module so that the drive module controls the outdoor unit to operate based on the target operating frequency.

[0166] In some embodiments, the above-mentioned control of the power factor correction module to start working includes: sending a first voltage flag bit to the power factor correction module; the first voltage flag bit is used to indicate that the control of the power factor correction module to start working; the above-mentioned determination of the target operating frequency of the outdoor unit according to the target operating state indicated in the power-on command includes: upon receiving the first target flag bit returned by the power factor correction module, determining that the power factor correction module is in a working state, and determining the target operating frequency of the outdoor unit according to the target operating state indicated in the power-on command.

[0167] In some embodiments, sending a first voltage flag bit to the power factor correction module includes: sending an enable bit to the power factor correction module; the enable bit is used to indicate that the power factor correction module is in an active state; and sending a first voltage flag bit to the power factor correction module.

[0168] In some embodiments, when the state change instruction is a shutdown instruction, the state change sequence is: the drive module controls the outdoor unit to stop running, the power factor correction module is turned off, and the drive module controls the internal circuit of the air conditioning system to be turned off.

[0169] In some embodiments, the control drive module and the power factor correction module sequentially change state, including: sending a shutdown command to the drive module to cause the drive module to control the outdoor unit to stop running; controlling the power factor correction module to turn off; and sending a circuit shutdown command to the drive module to cause the drive module to control the circuit inside the air conditioning system to disconnect.

[0170] In some embodiments, the above-mentioned control of the power factor correction module to be turned off includes: sending a second voltage flag bit to the power factor correction module; the second voltage flag bit is used to indicate that the control of the power factor correction module to stop working.

[0171] In some embodiments, the above-mentioned control of the power factor correction module to be turned off includes: sending a second voltage flag bit to the power factor correction module when the current in the internal circuit of the air conditioner is less than a first threshold and a second target flag bit returned by the power factor correction module is received.

[0172] For example, the specific working process of controlling the air conditioning system can be referred to the above method embodiments, and will not be repeated here.

[0173] like Figure 14 As shown in the figure, this application embodiment also provides a control device for an air conditioning system. The control device 1400 for the air conditioning system includes: a determination module 1401 and a processing module 1402.

[0174] The aforementioned determining module 1401 is used to determine the state change sequence of the drive module and the power factor correction module based on the received state change command in response to the state change command; the state change command is used to instruct the outdoor unit to start or stop operation.

[0175] The aforementioned processing module 1402 is used to control the drive module and the power factor correction module to change their states sequentially according to the state change sequence, so as to start or stop the outdoor unit from running.

[0176] In some embodiments, when the state change instruction is a power-on instruction, the state change sequence is: the drive module controls the internal circuit of the air conditioning system to be turned on, the power factor correction module works, and the drive module controls the outdoor unit to start running.

[0177] In some embodiments, the processing module 1402 is specifically used to send a circuit turn-on command to the drive module so that the drive module controls the circuit in the air conditioning system to turn on; control the power factor correction module to start working; determine the target operating frequency of the outdoor unit according to the target operating state indicated in the start-up command, and send the target operating frequency to the drive module so that the drive module controls the outdoor unit to operate based on the target operating frequency.

[0178] In some embodiments, the processing module 1402 is specifically used to send a first voltage flag bit to the power factor correction module; the first voltage flag bit is used to indicate that the power factor correction module starts working; the above-mentioned determination of the target operating frequency of the outdoor unit according to the target operating state indicated in the power-on command includes: upon receiving the first target flag bit returned by the power factor correction module, determining that the power factor correction module is in a working state, and determining the target operating frequency of the outdoor unit according to the target operating state indicated in the power-on command.

[0179] In some embodiments, the processing module 1402 is specifically used to send an enable bit to the power factor correction module; the enable bit is used to indicate that the power factor correction module is in the start state; and to send a first voltage flag bit to the power factor correction module.

[0180] In some embodiments, when the state change instruction is a shutdown instruction, the state change sequence is: the drive module controls the outdoor unit to stop running, the power factor correction module is turned off, and the drive module controls the internal circuit of the air conditioning system to be turned off.

[0181] In some embodiments, the processing module 1402 is specifically used to send a shutdown command to the drive module so that the drive module controls the outdoor unit to stop running; control the power factor correction module to turn off; and send a circuit shutdown command to the drive module so that the drive module controls the circuit inside the air conditioning system to disconnect.

[0182] In some embodiments, the processing module 1402 is specifically used to send a second voltage flag bit to the power factor correction module; the second voltage flag bit is used to instruct the power factor correction module to stop working.

[0183] In some embodiments, the processing module 1402 is specifically used to send a second voltage flag bit to the power factor correction module when the current in the internal circuit of the air conditioner is less than a first threshold and a second target flag bit returned by the power factor correction module is received.

[0184] This application also provides a computer-readable storage medium, which includes computer-executable instructions that, when executed on a computer, cause the computer to perform the method provided in the above embodiments.

[0185] This application also provides a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement the methods provided in the above embodiments.

[0186] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, the disclosure, and the appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0187] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

[0188] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air conditioning system, characterized in that, include: Outdoor unit; A drive module, which is used to control the on / off state of the circuits within the air conditioning system and the operating status of the outdoor unit; A power factor correction module, wherein the power factor correction module is used to improve the power factor between the power supply and the outdoor unit; The main control module is configured as follows: In response to receiving a status change command, the sequence of status changes for the drive module and the power factor correction module is determined based on the status change command; the status change command is used to instruct the outdoor unit to start or stop operation. According to the state change sequence, the drive module and the power factor correction module are controlled to change state sequentially so that the outdoor unit starts or stops running.

2. The air conditioning system according to claim 1, characterized in that, When the state change command is a power-on command, the state change sequence is as follows: the drive module controls the internal circuit of the air conditioning system to be turned on, the power factor correction module works, and the drive module controls the outdoor unit to start running.

3. The air conditioning system according to claim 2, characterized in that, The control of the drive module and the power factor correction module to sequentially change state includes: Send a circuit turn-on command to the drive module so that the drive module controls the circuit in the air conditioning system to turn on; The power factor correction module is controlled to start working; Based on the target operating state indicated in the power-on command, the target operating frequency of the outdoor unit is determined, and the target operating frequency is sent to the drive module so that the drive module controls the operation of the outdoor unit based on the target operating frequency.

4. The air conditioning system according to claim 3, characterized in that, The process of controlling the power factor correction module to start working includes: A first voltage flag is sent to the power factor correction module; the first voltage flag is used to indicate that the power factor correction module should start working. Determining the target operating frequency of the outdoor unit based on the target operating state indicated in the power-on command includes: Upon receiving the first target flag bit returned by the power factor correction module, it is determined that the power factor correction module is in working state, and the target operating frequency of the outdoor unit is determined according to the target operating state indicated in the power-on command.

5. The air conditioning system according to claim 4, characterized in that, Sending the first voltage flag bit to the power factor correction module includes: Send an enable bit to the power factor correction module; the enable bit is used to indicate that the power factor correction module is in the start state. Send the first voltage flag bit to the power factor correction module.

6. The air conditioning system according to claim 1, characterized in that, When the state change command is a shutdown command, the state change sequence is as follows: the drive module controls the outdoor unit to stop running, the power factor correction module is turned off, and the drive module controls the internal circuit of the air conditioning system to be shut down.

7. The air conditioning system according to claim 6, characterized in that, The control of the drive module and the power factor correction module to sequentially change state includes: Send a shutdown command to the drive module so that the drive module controls the outdoor unit to stop running; The power factor correction module is turned off. A circuit shutdown command is sent to the drive module so that the drive module controls the circuit within the air conditioning system to disconnect.

8. The air conditioning system according to claim 7, characterized in that, The control of shutting down the power factor correction module includes: A second voltage flag is sent to the power factor correction module; the second voltage flag is used to indicate that the power factor correction module should stop working.

9. The air conditioning system according to claim 7, characterized in that, The control of shutting down the power factor correction module includes: If the current in the internal circuit of the air conditioner is less than the first threshold and the second target flag bit is received from the power factor correction module, the second voltage flag bit is sent to the power factor correction module.

10. A control method for an air conditioning system, characterized in that, include: In response to receiving a state change instruction, the state change sequence of the drive module and the power factor correction module is determined based on the state change instruction; The status change command is used to instruct the outdoor unit to start or stop operating; According to the state change sequence, the drive module and the power factor correction module are controlled to change state sequentially so that the outdoor unit starts or stops running.

Images