Air-conditioning fan drive circuit and method, air-conditioning system, and device

Abstract

An air-conditioning fan drive circuit and method, an air-conditioning system, and a device. The air-conditioning fan drive circuit comprises a Vienna rectifier (120) coupled to a three-phase power supply (110), a detection module (130), a fan inverter module (150), and a control module (140). An output capacitor in the Vienna rectifier (120) comprises at least two voltage division capacitors connected in series. The voltage division capacitors are connected in parallel to the fan inverter module (150) by means of a direct-current bus, and the fan inverter module (150) drives the air-conditioning fan on the basis of a rectified signal outputted by the Vienna rectifier (120).

Description

Air conditioner fan drive circuit, method, air conditioner system and device

[0001] Cross-reference to related applications

[0002] This application is based on the application with CN application number 202411284876.3 and application date September 13, 2024, and claims priority thereto, the disclosure of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of air conditioners, in particular to an air conditioner fan drive circuit, method, air conditioner system and device. BACKGROUND

[0004] With the rapid development of air conditioning technology, an air conditioner multi-fan system has appeared, that is, at least two fans are included in the same air conditioner system.

[0005] At present, a three-phase power supply is usually used for power supply in the air conditioner multi-fan system, which results in a relatively high voltage of the direct current bus in the air conditioner multi-fan system, and a fan inverter module with a higher voltage withstand level needs to be used to control the start and operation of the fan. SUMMARY

[0006] In a first aspect, the embodiments of the present disclosure provide an air conditioner fan drive circuit, comprising: a Vienna rectifier coupled with a three-phase power supply, a detection module, a fan inverter module, and a control module;

[0007] The output capacitor of the Vienna rectifier includes at least two voltage dividing capacitors connected in series, and the voltage dividing capacitors are connected in parallel with the fan inverter module through a direct current bus of the air conditioner fan drive circuit.

[0008] The detection module is configured to detect the Vienna rectifier and generate a detection sampling signal corresponding to the Vienna rectifier, wherein the detection sampling signal includes a three-phase sampling signal and an output voltage signal.

[0009] The control module is configured to determine a line state according to the three-phase sampling signal, output a rectifier tube closing signal if the line state is a first line state, wherein the rectifier tube closing signal is used to close all rectifier transistors in the Vienna rectifier, and output a three-phase modulation wave signal according to the three-phase sampling signal and the output voltage signal if the line state is a second line state.

[0010] The Vienna rectifier is configured to rectify current based on a three-phase power supply signal provided by the three-phase power supply and a control signal output by the control module, and output a rectified signal, wherein the control signal includes the three-phase modulation wave signal and the rectifier tube closing signal.

[0011] The fan inverter module is configured to drive the air conditioner fan according to the rectification signal.

[0012] For example, the at least two voltage division capacitors include a first capacitor and a second capacitor, and the Vienna rectifier includes three single-phase rectification circuits;

[0013] The first end of each single-phase rectification circuit is electrically connected to a target single-phase power supply in the three-phase power supply through an inductive filter, the second end of each single-phase rectification circuit is electrically connected to the first end of the first capacitor, the third end of each single-phase rectification circuit is electrically connected to the second end of the second capacitor, the third end of each single-phase rectification circuit is electrically connected to a voltage division node, and the control end of each single-phase rectification circuit is electrically connected to a control output end of the control module, the control output end of the control module being configured to output the rectification tube closing signal or the three-phase modulation wave signal, and the voltage division node being a node connected by the first capacitor, the second capacitor, and the single-phase rectification circuit.

[0014] For example, each single-phase rectification circuit includes the inductive filter, a first diode, a second diode, and a single-phase rectification transistor.

[0015] The input end of the inductive filter is electrically connected to the target single-phase power supply, and the output end of the inductive filter is electrically connected to the anode of the first diode, the cathode of the second diode, and the first end of the single-phase rectification transistor, the cathode of the first diode is electrically connected to the first end of the first capacitor, the second end of the first capacitor is electrically connected to the first end of the second capacitor, the second end of the single-phase rectification transistor, and the voltage division node, and the control end of the single-phase rectification transistor is electrically connected to the control output end of the control module.

[0016] For example, the single-phase rectification transistor includes a first insulated gate bipolar transistor and a second insulated gate bipolar transistor with opposite control polarities.

[0017] The first end of the first insulated gate bipolar transistor is electrically connected to the output end of the inductive filter, the anode of the first diode, and the cathode of the second diode, the second end of the first insulated gate bipolar transistor is electrically connected to the second end of the second insulated gate bipolar transistor, the first end of the second insulated gate bipolar transistor is electrically connected to the second end of the first capacitor, the first end of the second capacitor, and the voltage division node.

[0018] For example, the inductive filter includes a filter inductor and a resistor, the first end of the filter inductor is electrically connected to the target single-phase power supply, and the second end of the filter inductor is electrically connected to the anode of the first diode, the cathode of the second diode, and the first end of the single-phase rectification transistor through the resistor.

[0019] For example, the fan inverter module comprises at least two inverters connected in series and the air conditioner fan connected with the inverters one by one,

[0020] The control end of each inverter is electrically connected with the driving control end of the control module.

[0021] The control module is further configured to output an inverter control signal according to the master control instruction.

[0022] The inverter is configured to output a driving signal to the air conditioner fan connected with the inverter based on the rectification signal according to the inverter control signal.

[0023] For example, the at least two voltage division capacitors comprise a first capacitor and a second capacitor, the direct current bus is divided into a first direct current bus and a second direct current bus, and the at least two inverters comprise a first inverter and a second inverter.

[0024] The first end of the first inverter is electrically connected with the first end of the first capacitor through the first direct current bus, the second end of the first inverter is electrically connected with the first end of the second inverter, the second end of the second inverter is electrically connected with the second end of the second capacitor through the second direct current bus, and the second end of the first capacitor is electrically connected with the first end of the second capacitor.

[0025] For example, the three-phase sampling signal comprises a three-phase current signal, the output voltage signal comprises a voltage signal of each voltage division capacitor, and the detection module comprises a voltage sampling circuit and a current sampling circuit.

[0026] The current sampling circuit is configured to sample and detect an input current of the Vienna rectifier to generate the three-phase current signal.

[0027] The voltage sampling circuit is configured to detect a voltage of the voltage division capacitor to generate the voltage signal of the voltage division capacitor.

[0028] For example, the three-phase sampling signal further comprises a three-phase voltage signal, and the voltage sampling circuit is further configured to sample and detect an input voltage of the Vienna rectifier to generate the three-phase voltage signal.

[0029] In a second aspect, the embodiments of the present disclosure provide an air conditioner system comprising the air conditioner fan driving circuit according to any one of the first aspect of the present disclosure.

[0030] In a third aspect, the embodiments of the present disclosure provide an air conditioner fan driving method applied to the air conditioner fan driving circuit according to any one of the first aspect of the present disclosure, and the method comprises:

[0031] The Vienna rectifier in the air conditioner fan driving circuit is detected to generate a detection sampling signal corresponding to the Vienna rectifier, the detection sampling signal including a three-phase sampling signal and an output voltage signal;

[0032] A line state is determined according to the three-phase sampling signal;

[0033] If the line state is a first line state, a rectifier tube closing signal is outputted, the rectifier tube closing signal being used to close all rectifier transistors in the Vienna rectifier;

[0034] If the line state is a second line state, a three-phase modulation wave signal is generated according to modulation of the three-phase sampling signal and the output voltage signal, and the three-phase modulation wave signal is outputted to the Vienna rectifier;

[0035] The Vienna rectifier is used to rectify a three-phase power supply signal provided by a three-phase power supply to output a rectification signal, the rectification signal being used to drive the air conditioner fan.

[0036] For example, the line state is determined according to the three-phase sampling signal, including:

[0037] A bus current of the air conditioner fan driving circuit is calculated according to the three-phase sampling signal;

[0038] If the bus current is less than a preset switching current, the first line state is determined as the line state;

[0039] If the bus current is greater than the preset switching current, the second line state is determined as the line state.

[0040] In a fourth aspect, the disclosure provides an air conditioner device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus; the memory is used to store a computer program; the processor is used to execute the program stored on the memory to implement the steps of the air conditioner fan driving method according to any one of the third aspect of the disclosure.

[0041] According to some embodiments of the disclosure, a computer readable storage medium is provided, and a computer program is stored on the computer readable storage medium, the program being executed by a processor to implement the air conditioner fan driving method according to any one of the above embodiments.

[0042] According to some embodiments of the disclosure, a computer program product is also provided, including instructions, the instructions being executed by a processor to make the processor execute the air conditioner fan driving method according to any one of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure together with the specification.

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the related art, the accompanying drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0045] One or more embodiments are illustrated by way of example with reference to the drawings, which are not limiting of the embodiments and are merely meant to explain the principles of the embodiments. The reference numbers in the drawings are identical to those in the embodiments, and the elements having the same reference numbers indicate the same elements, unless otherwise specified. The drawings in the accompanying drawings are not limiting of the scale.

[0046] Fig. 1 is a structural block diagram of an air conditioner fan driving circuit according to an embodiment of the present disclosure;

[0047] Fig. 2 is a schematic diagram of an air conditioner fan driving circuit according to an embodiment of the present disclosure;

[0048] Fig. 3 is a schematic diagram of steps of an air conditioner fan driving circuit method according to an embodiment of the present disclosure;

[0049] Fig. 4 is a structural schematic diagram of an air conditioner system according to an embodiment of the present disclosure;

[0050] Fig. 5 is a structural schematic diagram of an air conditioner device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0051] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of the present disclosure.

[0052] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present disclosure. For the purpose of simplicity, the components and arrangements of the particular examples will be described in the following disclosure. These are, of course, merely examples and are not intended to limit the disclosure. Also, the present disclosure can be implemented in different examples with variations that do not depart from the spirit or scope of the present disclosure. Moreover, the present disclosure can be used in combination with other examples that do not depart from the spirit or scope of the present disclosure.

[0053] The inventors of the present disclosure find that the above related art has the following problem: as the number of fans used in the air conditioning system increases, the voltage withstand level of the fan inverter module needs to be increased, increasing the production cost of the air conditioning system.

[0054] Currently, from the main load in the air conditioning system, the compressor consumes most of the energy, and the fan consumes a small part of the energy. In addition, the Vienna rectifier, as a high-efficiency and high-power power conversion circuit, can be applied to the AC-DC working condition.

[0055] Therefore, the present disclosure provides an air conditioner fan driving circuit, method, air conditioning system and device to solve the high cost problem caused by the high voltage withstand level of the fan inverter module in the related art.

[0056] Based on the above, the embodiments of the present application provide an air conditioner fan driving circuit, method, air conditioning system and device to use a Vienna rectifier in an air conditioning system, convert three-phase alternating current into direct current through the Vienna rectifier, and reduce the voltage withstand level of the fan inverter module by using a voltage dividing capacitor, thereby greatly reducing the production cost of the system and solving the high cost problem caused by the high voltage withstand level of the fan inverter module in the existing related art.

[0057] The air conditioner fan driving circuit, method, air conditioning system and device provided by the embodiments of the present disclosure detect the Vienna rectifier through the detection module to generate a detection sampling signal, and the detection sampling signal includes a three-phase sampling signal and an output voltage signal, so that the control module can determine the line state according to the three-phase sampling signal to output a rectifier tube closing signal when the line state is a first line state, and close all rectifier transistors in the Vienna rectifier. When the line state is a second line state, the three-phase sampling signal and the output voltage signal are modulated to output a three-phase modulation wave signal, which is transmitted to the Vienna rectifier. The Vienna rectifier can rectify the current based on the three-phase power supply signal provided by the three-phase power supply and the control signal output by the control module, output a rectified signal, and transmit it to the fan inverter module. The fan inverter module can drive the air conditioner fan according to the rectified signal to control the start and operation of the air conditioner fan, realize the operation control of the air conditioner fan, and the output capacitor in the Vienna rectifier includes at least two voltage dividing capacitors connected in series. The voltage dividing capacitors are connected in parallel between the DC bus of the air conditioner fan driving circuit and the fan inverter module to divide the voltage of the DC bus through the voltage dividing capacitors, so that the voltage withstand level of the fan inverter module can be reduced, thereby reducing the production cost of the system and solving the high cost problem caused by the high voltage withstand level of the fan inverter module in the related art.

[0058] It should be noted that the air conditioner fan refers to the fan used in the air conditioning system, which can include the fan in the air conditioner multi-fan system.

[0059] Fig. 1 is a structural block diagram of an air conditioner fan drive circuit according to an embodiment of the present disclosure. As shown in Fig. 1, the air conditioner fan drive circuit according to an embodiment of the present disclosure can include a Vienna rectifier 120 coupled with a three-phase power supply 110, a detection module 130, a fan inverter module 150, and a control module 140. The output capacitor of the Vienna rectifier 120 includes at least two voltage dividing capacitors connected in series. The voltage dividing capacitors are connected in parallel with the fan inverter module 150 through a DC bus of the air conditioner fan drive circuit, so that the fan inverter module 150 can drive the air conditioner fan according to the rectified signal output by the Vienna rectifier 120 to achieve start and operation control of the air conditioner fan, and the voltage dividing capacitors can divide the voltage, so that the voltage withstand level of the fan inverter module 150 can be reduced, thereby reducing the production cost of the system and solving the problem of high cost caused by high voltage withstand level of the fan inverter module in the related art.

[0060] In some embodiments, the detection module 130 in the present disclosure is configured to detect the Vienna rectifier 120, generate a detection sampling signal corresponding to the Vienna rectifier 120, and transmit the detection sampling signal to the control module 140, so that the control module 140 can achieve output control and signal modulation based on the detection sampling signal.

[0061] In some embodiments of the present disclosure, the detection sampling signal corresponding to the Vienna rectifier 120 can include a three-phase sampling signal and an output voltage signal, so that the control module 140 can determine the line state according to the three-phase sampling signal, output a rectifier tube closing signal when the line state is a first line state to close all rectifier transistors in the Vienna rectifier 120, so that the Vienna rectifier 120 rectifies in a passive LC manner; and when the line state is a second line state, modulate according to the three-phase sampling signal and the output voltage signal, output a three-phase modulation wave signal, and transmit the three-phase modulation wave signal to the Vienna rectifier 120, so that the Vienna rectifier 120 can modulate according to the three-phase modulation wave signal to achieve rectification output control. The control module 140 is configured to determine the line state according to the three-phase sampling signal. If the line state is the first line state, a rectifier tube closing signal is output to close all rectifier transistors in the Vienna rectifier 120. If the line state is the second line state, the three-phase sampling signal and the output voltage signal are modulated to output a three-phase modulation wave signal. The Vienna rectifier 120 is configured to rectify current based on the three-phase power supply signal provided by the three-phase power supply 110 in combination with the control signal output by the control module 140 to output a rectified signal. The control signal includes the three-phase modulation wave signal and the rectifier tube closing signal.

[0062] To sum up, the air conditioner fan driving circuit provided by the embodiments of the present disclosure detects the Vienna rectifier 120 coupled with the three-phase power supply 110 to generate a detection sampling signal, and the detection sampling signal includes a three-phase sampling signal and an output voltage signal, so that the control module 140 can determine the line state according to the three-phase sampling signal, output a rectifier tube closing signal when the line state is a first line state, and close all rectifier transistors in the Vienna rectifier 120, and when the line state is a second line state, modulate the three-phase sampling signal and the output voltage signal to output a three-phase modulation wave signal, which is transmitted to the Vienna rectifier 120, so that the Vienna rectifier 120 can rectify the current based on the three-phase power supply 110 signal provided by the three-phase power supply 110 in combination with the control signal output by the control module 140, output a rectified signal to the fan inverter module 150, so that the fan inverter module 150 can drive the air conditioner fan according to the rectified signal to control the start and operation of the air conditioner fan, and the output capacitor in the Vienna rectifier 120 includes at least two voltage dividing capacitors connected in series, which are connected in parallel with the fan inverter module 150 through the DC bus of the air conditioner fan driving circuit, so that the voltage of the DC bus is divided by the voltage dividing capacitors, so that the voltage resistance level of the fan inverter module 150 can be reduced, thereby reducing the production cost of the system, and solving the problem of high cost caused by the high voltage resistance level of the fan inverter module 150 in the related art.

[0063] In addition, the fan inverter module 150 in the embodiments of the present disclosure is used to drive the air conditioner fan according to the rectified signal, so as to realize the start and operation control of the air conditioner fan and ensure the normal work of the air conditioner fan.

[0064] In some embodiments of the present disclosure, the three-phase power supply 110 signal provided by the three-phase power supply 110 can include a signal of three-phase alternating current provided by the three-phase power supply 110, for example, which can be used to represent three-phase alternating current. The Vienna rectifier 120 is a kind of high-efficiency and high-power power transformation circuit, for example, which can include a three-phase rectifier circuit, and each phase rectifier circuit can be a group of single-phase rectifier circuits, so that the Vienna rectifier 120 can realize rectification control of the three-phase power supply 110 signal through three groups of single-phase rectifier circuits.

[0065] For example, the at least two series-connected voltage dividing capacitors in the Vienna rectifier 120 can include a first capacitor C1 and a second capacitor C2, as shown in FIG. 2. The first end of each single-phase rectifier circuit in the Vienna rectifier 120 is electrically connected to a target single-phase power supply in the three-phase power supply 110 through an inductive filter. The second end of each single-phase rectifier circuit is electrically connected to the first end of the first capacitor C1. The third end of each single-phase rectifier circuit is electrically connected to the second end of the second capacitor C2. The third end of each single-phase rectifier circuit is electrically connected to a voltage dividing node. The control end of each single-phase rectifier circuit is electrically connected to the control output end of the control module 140. The control output end of the control module 140 is used to output the rectifier tube closing signal or the three-phase modulation wave signal. The voltage dividing node is the node connected by the first capacitor C1, the second capacitor C2, and the single-phase rectifier circuit. The target single-phase power supply is the single-phase power supply connected to the single-phase rectifier circuit.

[0066] In some embodiments, each single-phase rectifier circuit includes the inductive filter 210, a first diode D1, a second diode D2, and a single-phase rectifier transistor. The input end of the inductive filter 210 is electrically connected to the target single-phase power supply. The output end of the inductive filter 210 is electrically connected to the anode of the first diode D1, the cathode of the second diode D2, and the first end of the single-phase rectifier transistor. The cathode of the first diode D1 is electrically connected to the first end of the first capacitor C1. The second end of the first capacitor C1 is electrically connected to the first end of the second capacitor C2, the second end of the single-phase rectifier transistor, and the voltage dividing node. The control end of the single-phase rectifier transistor is electrically connected to the control output end of the control module 140. The control module 140 can output a control signal through the control output end to control the conduction and closing of the single-phase rectifier transistor, thereby achieving output control. The control output end of the control module 140 is used to output a control signal to the Vienna rectifier 120 to control the conduction and closing of the single-phase rectifier transistor through the control signal.

[0067] In some embodiments of the present disclosure, the transistor in the single-phase rectifier transistor can be implemented by an Insulated Gate Bipolar Transistor (IGBT) with a relatively low withstand voltage rating, thereby reducing the cost of the system. The control signal output by the control module 140 can be used as a switching tube driving signal, thereby controlling the conduction and closing of the single-phase rectifier transistor through the switching driving signal to achieve rectification control of the Vienna rectifier 120.

[0068] For example, the single-phase rectifier transistor in the embodiments of the present disclosure includes a first insulated gate bipolar transistor G1 and a second insulated gate bipolar transistor G2 with opposite polarities, so that the control module 140 can control the conduction and non-conduction of the transistors in the same single-phase rectifier circuit through the switching driving signal. The first end of the first insulated gate bipolar transistor G1 is electrically connected to the output end of the inductive filter 210, the anode of the first diode D1, and the cathode of the second diode D2, the second end of the first insulated gate bipolar transistor G1 is electrically connected to the second end of the second insulated gate bipolar transistor G2, and the first end of the second insulated gate bipolar transistor G2 is electrically connected to the second end of the first capacitor, the first end of the second capacitor, and the voltage division node.

[0069] In some embodiments of the present disclosure, the inductive filter 210 includes a filter inductor L and a resistor R, so that the inductive filter 210 can transmit the power signal provided by the target single-phase power supply to the single-phase rectifier circuit connected to the target single-phase power supply through the filter inductor L and the resistor R. For example, as shown in FIG. 2, the first end of the filter inductor L is electrically connected to the target single-phase power supply, and the second end of the filter inductor L is electrically connected to the anode of the first diode D1, the cathode of the second diode D2, and the first end of the single-phase rectifier transistor through the resistor R.

[0070] Of course, the filter inductor L and the resistor R in the inductive filter 210 can also be connected in other ways in series with the single-phase rectifier circuit. For example, the first end of the filter inductor L is connected to the target single-phase power supply through the resistor R, and the second end of the filter inductor L is directly connected to the anode of the first diode D1, the cathode of the second diode D2, and the first end of the single-phase rectifier transistor, so that the inductive filter 210 can transmit the power signal provided by the target single-phase power supply to the single-phase rectifier circuit connected to the target single-phase power supply through the filter inductor L.

[0071] In some embodiments, all the rectifier transistors in the Vienna rectifier can be turned off first, and the Vienna rectifier 120 can be rectified in a passive LC manner; by turning on the compressor and the air blower of the air conditioner, the input current can reach a certain value, so that the rectifier transistors in the Vienna rectifier 120 are turned on, i.e., the IGBT tubes in the Vienna rectifier 120 are turned on, to perform power factor correction (PFC), so that the power factor of the Vienna rectifier 120 is 1, reaching the best power factor state.

[0072] In some embodiments, the air conditioner fan drive circuit is implemented as follows: Voltage and current are sampled by the detection module 130 to measure the three-phase sampling signal and output voltage signal corresponding to the Vienna rectifier 120. This allows the control module 140 to determine the actual value of the line based on the three-phase sampling signal, and then determine the line state based on the actual value. For example, if the actual current value of the line is used as the actual value for determining the line state, after determining the actual current value of the line based on the three-phase sampling signal, the current line state can be determined by judging whether the effective current value of the line is greater than a preset current value. For example, if the effective current value of the line is less than the preset current value... In the case of a situation where the current line state is determined as the first line state, a rectifier tube shutdown signal is output to shut down all rectifier transistors in the Vienna rectifier 120. When the effective value of the line current is greater than the preset current value, that is, after the effective value of the line current reaches the preset current value, the current line state can be switched to the second line state. The current input signal can be modulated, such as the three-phase sampling signal and the output voltage signal detected by the detection module 130, to obtain a three-phase modulated wave signal. The three-phase modulated wave signal can then be output to the rectifier transistors to turn the circuit on and off accordingly, thereby realizing the output control of the rectifier transistors.

[0073] In this embodiment, the bus current corresponding to the first line state is less than the bus current corresponding to the second line state. The preset current value refers to a current threshold set in advance for the line state switching requirements. It can be used as the switching current to determine the line state. For example, when the bus current is less than the preset switching current, the first line state is determined as the current line state of the air conditioner fan drive circuit; while when the bus current is greater than the preset switching current, the second line state is determined as the current line state of the air conditioner fan drive circuit, thereby making the bus current corresponding to the first line state less than the bus current corresponding to the second line state. When the bus current is equal to the preset switching current, either the second line state or the first line state is determined as the current line state of the air conditioner fan drive circuit. This embodiment does not limit this.

[0074] In some embodiments of this disclosure, the three-phase sampling signal detected by the detection module 130 may include a three-phase current signal, enabling the control module 140 to determine the line state based on the detected three-phase current signal. For example, the actual current value of the line can be determined as the effective current value of the line based on the detected three-phase current signal, and the current line state can be determined by judging whether the effective current value of the line is greater than a preset current value. For example, if the effective current value of the line is less than the preset current value, the current line state is determined as the first line state, and then a rectifier tube shutdown signal is output to shut down all rectifier transistors in the Vienna rectifier 120. If the effective current value of the line is greater than the preset current value, the current line state is determined as the second line state, and the current input signal can be modulated to obtain a three-phase modulated wave signal, which can then be output to the rectifier transistors for corresponding circuit switching on and off.

[0075] Among them, the three-phase current signal refers to the three-phase current sampling signal; the output voltage signal detected by the detection module 130 can include the voltage signal of each voltage divider capacitor, so that the control module 140 can determine the voltage on the voltage divider capacitor according to the voltage signal, thereby realizing bus voltage protection and voltage equalization control.

[0076] For example, in the case where the detection module 130 includes a voltage sampling circuit and a current sampling circuit, the voltage sampling circuit can sample the voltage to detect the voltage across the voltage divider capacitor and generate a voltage signal for the voltage divider capacitor as the output voltage signal. The current sampling circuit can also sample the current and transmit the sampled three-phase current signals as three-phase sampling signals to the control module 140, allowing the control module 140 to determine the line status based on the three-phase current signals. Specifically, the current sampling circuit samples and detects the input current of the Vienna rectifier 120 to generate the three-phase current signals; the voltage sampling circuit detects the voltage across the voltage divider capacitor and generates a voltage signal for the voltage divider capacitor.

[0077] Of course, the three-phase sampling signals detected by the detection module 130 in the embodiments of the present disclosure can include not only three-phase current signals, but also other types of three-phase sampling signals, such as three-phase voltage signals detected by the detection module 130 through voltage sampling circuit by sampling the input voltage of the Vienna rectifier 120. Therefore, in some embodiments of the present disclosure, the three-phase sampling signals detected by the detection module 130 include three-phase voltage signals, so that the control module 140 can determine the line state according to the three-phase voltage signals detected by the detection module 130. For example, in the case where the detection module 130 includes a voltage sampling circuit, the voltage sampling circuit can sample and detect the input voltage of the Vienna rectifier 120 to generate three-phase voltage signals, and the three-phase voltage signals can be transmitted to the control module 140 as three-phase sampling signals, so that the control module 140 can determine the line state according to the three-phase voltage signals. Among them, the three-phase voltage signals refer to three-phase voltage sampling signals

[0078] In some embodiments, in the case where the detection module 130 includes a voltage sampling circuit and a current sampling circuit, the detection module 130 can sample the voltage and current through the voltage sampling circuit and the current sampling circuit, so as to transmit the sampled three-phase current signals and three-phase voltage signals to the control module 140 as three-phase sampling signals, and then the control module 140 can determine the current effective value of the line according to the three-phase current signals and / or the three-phase voltage signals, so as to determine the current line state by judging whether the current effective value is greater than a preset current value. For example, in the case where the preset current value is 2A, by judging whether the current effective value of the line is greater than 2A, when the current effective value of the line is less than 2A, the current line state is determined as the first line state, and the rectifier tube closing signal is output to close all rectifier transistors in the Vienna rectifier 120; when the current effective value of the line is greater than 2A, the line state can be switched to the second line state, and the three-phase modulation wave signal can be obtained according to the current input signal, and then the three-phase modulation wave signal can be output to the rectifier transistor, so as to open the rectifier transistor through the switch tube driving signal contained in the three-phase modulation wave signal, and realize the control of the rectifier transistor. Among them, the current sampling circuit is used for sampling and detecting the input current of the Vienna rectifier 120 to generate the three-phase current signals; and the voltage sampling circuit is used for voltage detection of the voltage dividing capacitor to generate the voltage signal of the voltage dividing capacitor.

[0079] Of course, the voltage sampling circuit in the embodiments of the present disclosure can be used not only for voltage detection of the voltage dividing capacitor, but also for sampling and detecting the input voltage of the Vienna rectifier 120 to measure the three-phase voltage on the input side of the Vienna rectifier 120, so as to generate the three-phase voltage signals, and the control module 140 can determine the line state according to the three-phase voltage signals.

[0080] Therefore, in some embodiments, the voltage sampling circuit is further configured to sample and detect the input voltage of the Vienna rectifier 120, to generate a three-phase voltage signal, so that the detection module 130 can transmit the three-phase voltage signal to the control module 140 as a three-phase sampling signal, and then the control module 140 can determine the line state according to the three-phase voltage signal. For example, after receiving the three-phase voltage signal, the control module 140 can determine the voltage sampling value according to the three-phase voltage signal, and can convert the voltage sampling value into the actual current effective value of the line, to determine the current line state by judging whether the current effective value is greater than the preset current value, such as determining the current line state as the first line state when the current effective value is less than the preset current value 2A, and then outputting a rectifier tube closing signal to close all rectifier transistors in the Vienna rectifier 120; after the current effective value is greater than the preset current value 2A, the current line state is switched to the second line state, and the three-phase modulation wave signal is obtained according to the current input signal, and then the three-phase modulation wave signal can be output to the rectifier transistor to open the rectifier transistor in the Vienna rectifier 120 through the three-phase modulation wave signal.

[0081] It can be seen that the detection module 130 in the embodiment of the present disclosure can measure the three-phase current at the input side of the Vienna rectifier 120 through the current sampling circuit to generate a corresponding three-phase current signal, such as using a current transformer to obtain a current sampling value, and then the control module 140 can convert the current sampling value into the actual value of the line, which can represent the running state of the line, so that the actual value of the current sampling can be used as the switching basis of the on and off states of the rectifier transistor.

[0082] In addition, the detection module 130 in the embodiment of the present disclosure can measure the three-phase voltage at the input side of the Vienna rectifier 120 and the voltage on the capacitor at the output side through the voltage sampling circuit, that is, the voltage sampling circuit detects the three-phase voltage at the input side of the Vienna rectifier 120 and the voltage on the voltage dividing capacitor at the output side, generates a three-phase voltage signal based on the detected three-phase voltage as a three-phase sampling signal, and transmits it to the control module 140, so that the control module 140 can determine the input voltage effective value according to the three-phase voltage signal, and then can realize input high voltage and low voltage protection according to the input voltage effective value, such as triggering high voltage protection when the input voltage effective value is greater than 265V, and triggering low voltage protection when the input voltage effective value is less than 165V, and can generate a voltage signal of the voltage dividing capacitor based on the detected voltage of the voltage dividing capacitor as an output voltage signal, and transmit it to the control module 140, so that the control module 140 can determine the output side voltage value according to the output voltage signal, which can include the voltage value on the voltage dividing capacitor, to realize bus voltage protection and voltage equalization control based on the voltage value on the voltage dividing capacitor, such as triggering high voltage protection when the total bus voltage is higher than 850V, and triggering low voltage protection when the total bus voltage is lower than 450V, which is not specifically limited in the embodiment of the present disclosure.

[0083] For example, the fan inverter module 150 in the embodiment of the present disclosure can include at least two inverters 220 connected in series and the air conditioner fan M connected one-to-one with the inverters 220, and the control end of each inverter 220 is electrically connected with the drive control end of the control module 140, so that the inverter 220 can output a drive signal to the air conditioner fan M connected thereto, thereby realizing the driving of the air conditioner fan M in the air conditioner multi-fan system. Wherein, the control module 140 is further used for outputting an inverter control signal according to the master control instruction; the inverter 220 is used for outputting a drive signal to the air conditioner fan M connected thereto based on the rectification signal according to the inverter control signal.

[0084] In some embodiments of the present disclosure, the DC bus in the air conditioner fan M driving circuit is divided into a first DC bus and a second DC bus, at least two voltage dividing capacitors included in the output capacitor of the Vienna rectifier 120 can include a first capacitor C1 and a second capacitor C2, and the first capacitor C1 can be directly connected to the first DC bus, and the second capacitor C2 can be directly connected to the second DC bus. For example, when the wiring of an even number of fans in the air conditioner multi-fan system, the first end of the first capacitor C1 can be connected to the first DC bus, the second end of the first capacitor C1 can be connected to the first end of the second capacitor C2, and the second end of the second voltage dividing capacitor can be connected to the second DC bus, so as to divide the DC bus in the air conditioner fan M driving circuit into the first DC bus and the second DC bus. The first DC bus and the second DC bus serve as upper and lower DC buses and can be connected to half of the fans, respectively. By voltage dividing through the first capacitor C1 and the second capacitor C2, the fan inverter module 150 can select IGBT with low voltage withstand level as the inverter 220 for driving the air conditioner fan M, thereby reducing the production cost of the system.

[0085] In some embodiments of the present disclosure, the at least two inverters 220 connected in series in the fan inverter module 150 include a first inverter and a second inverter. The first end of the first inverter is electrically connected to the first end of the first capacitor C1 through the first DC bus. The second end of the first inverter is electrically connected to the first end of the second inverter. The second end of the second inverter is electrically connected to the second end of the second capacitor C2 through the second DC bus. The second end of the first capacitor C1 is electrically connected to the first end of the second capacitor C2. Thus, voltage dividing can be performed through the first capacitor C1 and the second capacitor C2 to reduce the voltage withstand level of the inverter 220 at the hardware level by using the voltage dividing capacitor. The inverters 220 can be used to evenly distribute the air conditioner fans M in the air conditioner multi-fan system to the first capacitor C1 and the second capacitor C2, thereby reducing the production cost of the system.

[0086] In some embodiments, taking the rectifier transistor in the Vienna rectifier 120 as an example, when the pre-set 2A current is the switching current, the IGBT in the Vienna rectifier 120 can be first turned off, the Vienna rectifier 120 can be rectified in a passive LC manner, and the compressor and the air conditioner fan M of the air conditioner can be turned on. When the input current reaches the switching current 2A, the IGBT in the Vienna rectifier 120 is turned on, i.e., the power factor correction (PFC) is turned on. The implementation is as follows:

[0087] First, voltage and current sampling is performed by the detection module 130 to measure the three-phase voltage and three-phase current at the input side of the Vienna rectifier 120 and the voltage on the capacitor at the output side; for example, the voltage sampling circuit in the detection module 130 can use a resistance voltage dividing circuit to obtain voltage sampling values in a differential sampling manner, and then convert the voltage sampling values into actual values of the line; the current sampling circuit in the detection module 130 can use a current transformer to obtain current sampling values, and then convert the current sampling values into actual values of the line, which can represent the operating state of the line, and the actual values of the current sampling can be used as switching of the on and off states of the rectifier tube, when the effective value of the current is less than 2A, the IGBT tube in the Vienna rectifier 120 is turned off, and when the effective value of the current is greater than 2A, the IGBT tube in the Vienna rectifier 120 is turned on. In addition, the actual values of the input side voltage sampling can be used as input high voltage and low voltage protection, by detecting the effective value of the input voltage, high voltage protection can be triggered when the effective value of the input voltage is greater than 265V, and low voltage protection can be triggered when the effective value of the input voltage is less than 165V; and the actual values of the output side voltage sampling can be used as bus voltage protection and voltage equalization control, high voltage protection can be triggered when the total bus voltage is higher than 850V, and low voltage protection can be triggered when the total bus voltage is lower than 450V.

[0088] Second, based on the detection sampling signals obtained by voltage and current sampling, control and modulation are performed by the control module 140, such as modulation according to the current input signal to obtain three-phase modulation waves of the switching tube, for example, the current input signal can include three-phase voltage signals and three-phase current signals at the input side of the power supply, so that three-phase voltage signals and three-phase current signals can be used as the basis for controlling three groups of single-phase rectifier circuits in the Vienna rectifier 120, such as obtaining the phase of the power grid through a phase-locked loop according to the three-phase voltage signals and three-phase current signals, stabilizing the three-phase input side current through a current control loop according to the phase, and stabilizing the DC output side inductance voltage through a voltage control loop, and then performing comparison and calculation to modulate according to the space vector to determine the size sector interval of the vector voltage, so that three-phase modulation wave signals can be generated according to the sector interval where the vector voltage is located.

[0089] Third, output control is performed according to the three-phase modulation wave signals, for example, the three-phase modulation wave signals can be output to the IGBT tube in the Vienna rectifier 120, the IGBT tube serving as a switching tube, and then the on-off time of the IGBT tube can be controlled through the three-phase modulation wave signals to turn on and turn off the corresponding circuit, so as to control the output of the Vienna rectifier 120 and the output of the inverter 220, and the on and off of the inverter 220 can be switched according to the main control instruction sent by the control module 140, which is not specifically limited in the embodiment of the present disclosure.

[0090] FIG. 3 is a schematic diagram of steps of a method of driving a fan of an air conditioner according to an embodiment of the present disclosure. The method of driving a fan of an air conditioner according to an embodiment of the present disclosure can be applied to the method of driving a fan of an air conditioner according to any of the embodiments of the present disclosure. As shown in FIG. 3, the method of driving a fan of an air conditioner may, for example, include the following steps:

[0091] In step 310, the Vienna rectifier in the air conditioner fan driving circuit is detected to generate a detection sampling signal corresponding to the Vienna rectifier. The detection sampling signal includes a three-phase sampling signal and an output voltage signal.

[0092] In step 320, a line state is determined based on the three-phase sampling signal.

[0093] In step 330, if the line state is a first line state, a rectifier tube closing signal is outputted. The rectifier tube closing signal is used to close all rectifier transistors in the Vienna rectifier.

[0094] In step 340, if the line state is a second line state, a three-phase modulation wave signal is generated by modulating the three-phase sampling signal and the output voltage signal, and the three-phase modulation wave signal is outputted to the Vienna rectifier.

[0095] The Vienna rectifier is used to rectify a three-phase power supply signal provided by a three-phase power supply to output a rectification signal, and the rectification signal is used to drive the air conditioner fan.

[0096] As can be seen, the method of driving a fan of an air conditioner according to an embodiment of the present disclosure detects the Vienna rectifier in the air conditioner fan driving circuit to generate a detection sampling signal corresponding to the Vienna rectifier. The detection sampling signal includes a three-phase sampling signal and an output voltage signal. Then, a line state is determined based on the three-phase sampling signal. When the line state is a first line state, a rectifier tube closing signal is outputted. Thus, all rectifier transistors in the Vienna rectifier can be closed by the rectifier tube closing signal. The Vienna rectifier rectifies a three-phase alternating current provided by a three-phase power supply in a passive LC manner to output a rectification signal. When the line state is a second line state, a three-phase modulation wave signal is generated by modulating the three-phase sampling signal and the output voltage signal, and the three-phase modulation wave signal is outputted to the Vienna rectifier. The Vienna rectifier can control the on-time and off-time of the rectifier transistors based on the three-phase modulation wave signal to achieve power factor correction. Thus, the power factor of the Vienna rectifier is 1, and the optimal power factor state is achieved.

[0097] In some embodiments of the present disclosure, determining the line state according to the three-phase sampling signal may include: calculating the bus current of the air conditioner fan drive circuit according to the three-phase sampling signal; determining the first line state as the line state if the bus current is less than a preset switching current; and determining the second line state as the line state if the bus current is greater than the preset switching current.

[0098] It should be noted that, for the method embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the embodiments of the present disclosure are not limited by the order of the described actions, because according to the embodiments of the present disclosure, certain steps can be performed in other orders or simultaneously.

[0099] As shown in FIG. 4, the embodiments of the present disclosure provide an air conditioning system 400, which includes an air conditioner fan drive circuit 410. The air conditioner fan drive circuit 410 can be the air conditioner fan drive circuit described in any of the embodiments of the present disclosure, so that the air conditioning system 400 can realize the conversion of three-phase alternating current to direct current through the Vienna rectifier in the air conditioner fan drive circuit 410, and reduce the voltage withstand level of the fan inverter module by using the voltage dividing capacitor, thereby reducing the production cost of the system and solving the problem of high cost caused by the high voltage withstand level of the fan inverter module in the related art.

[0100] For example, the air conditioning system provided by the embodiments of the present disclosure can be used as a control system of an air conditioning device. The Vienna rectifier coupled with the three-phase power supply is detected by the detection module to generate a detection sampling signal, so that the control module can determine the line state according to the three-phase sampling signal included in the detection sampling signal. When the line state is the first line state, the control module outputs a rectifier tube closing signal to close all rectifier transistors in the Vienna rectifier. When the line state is the second line state, the control module modulates according to the three-phase sampling signal and the output voltage signal included in the detection sampling signal, and transmits the three-phase modulated wave signal generated after modulation to the Vienna rectifier. The Vienna rectifier can control the conduction and turn-off of the rectifier transistor according to the three-phase modulated wave signal to realize power factor correction. Based on the three-phase power supply signal provided by the three-phase power supply, the current is rectified in combination with the control signal output by the control module to output a rectified signal, which is transmitted to the fan inverter module. The fan inverter module can drive the air conditioner fan according to the rectified signal to control the start of the air conditioner fan and realize the operation control of the air conditioner fan. The voltage of the direct current bus is divided by the voltage dividing capacitor, so that the voltage withstand level of the fan inverter module can be reduced, thereby reducing the production cost of the system and solving the problem of high cost caused by the high voltage withstand level of the fan inverter module in the related art.

[0101] As shown in FIG. 5, the embodiment of the present disclosure further provides an air conditioning equipment, comprising: a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112 and the memory 113 complete mutual communication through the communication bus 114, the memory 113 is used for storing a computer program; the processor 111 is used for executing the computer program stored on the memory 113, and the steps of the air conditioner fan driving method provided by any one of the preceding method embodiments are realized.

[0102] The embodiment of the present disclosure further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the air conditioner fan driving circuit method provided by any one of the preceding method embodiments. The equipment embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0103] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software plus a general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions or the part that contributes to the related art can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0104] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless otherwise specifically identified as an order dependency. It is also to be understood that additional or alternative steps can be employed.

[0105] The foregoing is merely illustrative of the various implementations of the present disclosure and the general principles thereof. Numerous modifications can be made to these illustrations, and equivalents can be substituted therefor, without departing from the scope of the present disclosure. The specific embodiments commensurate with the specific application are intended to be illustrative only and not limiting of the scope of the application as set forth in the following claims.

Claims

1. An air conditioner fan drive circuit, comprising: The Vienna rectifier coupled with the three-phase power supply, the detection module, the fan inverter module and the control module; The output capacitor of the Vienna rectifier includes at least two voltage dividing capacitors connected in series, and the voltage dividing capacitors are connected in parallel with the fan inverter module through the DC bus of the air fan driving circuit; The detection module is configured to detect the Vienna rectifier and generate a detection sampling signal corresponding to the Vienna rectifier, wherein the detection sampling signal includes a three-phase sampling signal and an output voltage signal; The control module is configured to determine a line state according to the three-phase sampling signal, output a rectifier tube closing signal for closing all rectifier transistors in the Vienna rectifier if the line state is a first line state, and output a three-phase modulation wave signal by modulating the three-phase sampling signal and the output voltage signal if the line state is a second line state; The Vienna rectifier is configured to rectify current based on a three-phase power supply signal provided by the three-phase power supply and a control signal output by the control module, and output a rectified signal, wherein the control signal includes the three-phase modulation wave signal and the rectifier tube closing signal; The fan inverter module is configured to drive the air fan according to the rectified signal.

2. The air conditioner fan drive circuit of claim 1, wherein, The at least two voltage dividing capacitors include a first capacitor and a second capacitor, and the Vienna rectifier includes three single-phase rectifier circuits; A first end of each single-phase rectifier circuit is electrically connected to a target single-phase power supply in the three-phase power supply through an inductor filter, a second end of each single-phase rectifier circuit is electrically connected to a first end of the first capacitor, a third end of each single-phase rectifier circuit is electrically connected to a second end of the second capacitor, the third end of each single-phase rectifier circuit is electrically connected to a voltage dividing node, and a control end of each single-phase rectifier circuit is electrically connected to a control output end of the control module, wherein the control output end of the control module is configured to output the rectifier tube closing signal or the three-phase modulation wave signal, and the voltage dividing node is a node connected by the first capacitor, the second capacitor and the single-phase rectifier circuit.

3. The air conditioner fan drive circuit of claim 2, wherein, Each single-phase rectifier circuit includes the inductor filter, a first diode, a second diode and a single-phase rectifier transistor; An input end of the inductor filter is electrically connected to the target single-phase power supply, an output end of the inductor filter is electrically connected to an anode of the first diode, a cathode of the second diode and a first end of the single-phase rectifier transistor, a cathode of the first diode is electrically connected to a first end of the first capacitor, a second end of the first capacitor is electrically connected to a first end of the second capacitor, a second end of the single-phase rectifier transistor and the voltage dividing node, and a control end of the single-phase rectifier transistor is electrically connected to the control output end of the control module.

4. The air conditioner fan drive circuit of claim 3, wherein, The single-phase rectifier transistor includes a first insulated gate bipolar transistor and a second insulated gate bipolar transistor with opposite control polarities. The first end of the first insulated gate bipolar transistor is electrically connected with the output end of the inductive filter, the anode of the first diode and the cathode of the second diode, the second end of the first insulated gate bipolar transistor is electrically connected with the second end of the second insulated gate bipolar transistor, the first end of the second insulated gate bipolar transistor is electrically connected with the second end of the first capacitor, the first end of the second capacitor and the voltage division node.

5. The air conditioner fan drive circuit of claim 3, wherein, The inductive filter comprises a filter inductor and a resistor, the first end of the filter inductor is electrically connected with the target single-phase power supply, and the second end of the filter inductor is electrically connected with the anode of the first diode, the cathode of the second diode and the first end of the single-phase rectifier tube through the resistor.

6. The air conditioner fan drive circuit according to any one of claims 1 to 5, wherein The fan inverter module comprises at least two inverters connected in series and the air conditioner fan connected with the inverters one by one; The control end of each inverter is electrically connected with the driving control end of the control module; The control module is further configured to output an inverter control signal according to a master control instruction; The inverter is configured to output a driving signal to the air conditioner fan connected with the inverter based on the rectified signal according to the inverter control signal.

7. The air conditioner fan drive circuit of claim 6, wherein, The at least two voltage division capacitors comprise a first capacitor and a second capacitor, the DC bus is divided into a first DC bus and a second DC bus, and the at least two inverters comprise a first inverter and a second inverter; The first end of the first inverter is electrically connected with the first end of the first capacitor through the first DC bus, the second end of the first inverter is electrically connected with the first end of the second inverter, and the second end of the second inverter is electrically connected with the second end of the second capacitor through the second DC bus, and the second end of the first capacitor is electrically connected with the first end of the second capacitor.

8. The air conditioner fan drive circuit according to any one of claims 1 to 7, wherein The three-phase sampling signal comprises a three-phase current signal, and the output voltage signal comprises a voltage signal of each voltage division capacitor, and the detection module comprises a voltage sampling circuit and a current sampling circuit; The current sampling circuit is configured to sample and detect an input current of the Vienna rectifier to generate the three-phase current signal; The voltage sampling circuit is configured to detect a voltage of the voltage division capacitor to generate the voltage signal of the voltage division capacitor.

9. The air conditioner fan drive circuit of claim 8, wherein, The three-phase sampling signal further comprises a three-phase voltage signal, and the voltage sampling circuit is further configured to sample and detect an input voltage of the Vienna rectifier to generate the three-phase voltage signal.

10. An air conditioning system comprising the air conditioner fan driving circuit according to any one of claims 1 to 9.

11. An air conditioner fan driving method applied to the air conditioner fan driving circuit according to any one of claims 1 to 9, the method comprising: detecting the Vienna rectifier in the air conditioner fan driving circuit to generate a detection sampling signal corresponding to the Vienna rectifier, the detection sampling signal comprising a three-phase sampling signal and an output voltage signal; determining a line state according to the three-phase sampling signal; and If the line state is a first line state, output a rectifier closing signal, the rectifier closing signal is used to close all rectifier transistors in the Vienna rectifier; If the line state is a second line state, modulate according to the three-phase sampling signal and the output voltage signal to generate a three-phase modulation wave signal, and output the three-phase modulation wave signal to the Vienna rectifier; The Vienna rectifier is used to rectify current based on a three-phase power supply signal provided by a three-phase power supply, and output a rectified signal, which is used to drive the air conditioner fan.

12. The air conditioner fan drive method of claim 11, wherein, The line state is determined according to the three-phase sampling signal, which includes: According to the three-phase sampling signal, the bus current of the air conditioner fan drive circuit is calculated; If the bus current is less than a pre-set switching current, the first line state is determined as the line state; If the bus current is greater than the pre-set switching current, the second line state is determined as the line state.

13. An air conditioning apparatus comprising: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus; The memory is used to store a computer program; The processor is used to execute the program stored on the memory, and realize the steps of the air conditioner fan drive method in claim 11 or 12.

14. A computer readable storage medium, which stores a computer program, the program being executed by a processor to realize the air conditioner fan drive method in claim 11 or 12.

15. A computer program product, which includes instructions, the instructions being executed by a processor to make the processor execute the air conditioner fan drive method in claim 11 or 12.

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