Power supply circuit control method, controller, air conditioner, and readable storage medium

Abstract

A power supply circuit control method, a controller, an air conditioner, and a readable storage medium. The control method includes obtaining the current operating frequency of a compressor (S410), determining a target mapping relationship corresponding to the current operating frequency from a preset set of mapping relationships, where the mapping relationships in the preset set of mapping relationships are used to represent the correspondence between the output voltage of a rectification and voltage regulation module and the operating frequency of the compressor (S410), determining a target voltage based on the current operating frequency and the target mapping relationship (S410), and controlling the rectification and voltage regulation module to adjust the output voltage of the rectification and voltage regulation module to the target voltage (S410).

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application filed on August 31, 2022, with the application number 202211062144.0 and the invention title "Control Method of Power Supply Circuit, Controller, Air Conditioner and Readable Storage Medium", and all of its contents are incorporated into this application by reference.

[0002] This application relates to the technical field of air conditioners, and particularly to a control method of a power supply circuit, a controller, an air conditioner and a readable storage medium.

Background Art

[0003] Current air conditioners generally adopt a boost power element to correct the circuit, improve the power element, increase the load operating voltage and reduce the operating current at the same time. The general load voltage is a fixed value. In order to prevent the compressor from entering the field weakening control, the voltage is generally set as a relatively high value. Due to the relatively high bus voltage, the leakage current of the compressor becomes relatively large, damaging the circuit.

Summary of the Invention

Problems to be Solved by the Invention

[0004] This application aims to at least partially solve one of the technical problems existing in the prior art. For this purpose, this application proposes a control method of a power supply circuit, a controller, an air conditioner and a readable storage medium that can reduce leakage current and switching loss and improve the energy efficiency and service life of the air conditioner.

Means for Solving the Problems

[0005] According to a first aspect, an embodiment of the present application provides a control method for a power supply circuit. The power supply circuit includes a rectification and voltage regulation module and an inverter module. The rectification and voltage regulation module is provided with an AC input terminal, a capacitance module, and a DC output terminal. The AC input terminal is used to connect to an AC power supply. The capacitance module is connected to the input terminal of the inverter module via the DC output terminal. The output terminal of the inverter module is used for electrical connection with a compressor. The control method includes obtaining the current operating frequency of the compressor, determining a target mapping relationship corresponding to the current operating frequency from a preset set of mapping relationships, where the mapping relationships in the preset set of mapping relationships are used to represent the correspondence between the output voltage of the rectification and voltage regulation module and the operating frequency of the compressor, determining a target voltage based on the current operating frequency and the target mapping relationship, and controlling the rectification and voltage regulation module to adjust the output voltage of the rectification and voltage regulation module to the target voltage.

[0006] The control method of the power supply circuit according to the embodiments of the present application has at least the following beneficial effects. By obtaining the current operating frequency of the compressor and determining the corresponding target mapping relationship from a set of preset mapping relationships based on the current operating frequency, where the mapping relationship is used to represent the correspondence between the output voltage of the rectification and voltage adjustment module and the operating frequency of the compressor, the corresponding target mapping relationship determined based on the current operating frequency is the correspondence between the current operating frequency and the target voltage output by the rectification and voltage adjustment module. Further, based on the target mapping relationship and the current operating frequency, the target voltage is determined, and the rectification and voltage adjustment module in the power supply circuit is controlled to adjust the output voltage of the rectification and voltage adjustment module to the target voltage. The target voltage corresponding to the current operating frequency is obtained by the set of preset mapping relationships, ensuring that the compressor meets the voltage requirements at the current operating frequency, reducing the leakage circuit and switching losses, and improving the energy efficiency and service life of the air conditioner. The set of mapping relationships for adjustment improves the speed and sensitivity of adjustment in a preset manner.

[0007] According to some embodiments of the present application, the target voltage is greater than a first preset voltage and less than a second preset voltage, where the first preset voltage is used to represent the output voltage of the rectification and voltage adjustment module corresponding to the compressor entering the weak field operation state, and the second preset voltage is used to represent the output voltage of the rectification and voltage adjustment module corresponding to the leakage current of the compressor being greater than a preset leakage current.

[0008] According to some embodiments of the present application, the set of pre-set mapping relationships includes a plurality of first pre-set mapping relationships. Different first pre-set mapping relationships correspond to different operating frequency intervals. The operating frequency intervals corresponding to each of the first pre-set mapping relationships are all greater than the first pre-set frequency and less than the second pre-set frequency, and the first pre-set frequency is less than the second pre-set frequency.

[0009] According to some embodiments of the present application, for each of the first pre-set mapping relationships, the ratio between the output voltage and the operating frequency corresponding to the first pre-set mapping relationship is a fixed value.

[0010] According to some embodiments of the present application, the plurality of first pre-set mapping relationships are obtained by obtaining the first pre-set frequency and the second pre-set frequency, and determining a plurality of the operating frequency intervals arranged in order based on the first pre-set frequency and the second pre-set frequency. For each of the operating frequency intervals, determining the boundary operating frequencies at both ends of the operating frequency interval, determining the boundary reference voltage based on the boundary operating frequencies, and determining the first pre-set mapping relationship corresponding to the operating frequency interval based on the boundary reference voltage.

[0011] According to some embodiments of the present application, determining the boundary reference voltage based on the boundary operating frequencies includes determining the lower limit output voltage of the rectification and voltage adjustment module corresponding to the compressor entering the weak field operation state at the boundary operating frequency, determining the upper limit output voltage of the rectification and voltage adjustment module corresponding to the leakage current of the compressor at the boundary operating frequency being greater than a pre-set leakage current, and determining the boundary reference voltage from between the lower limit output voltage and the upper limit output voltage. Here, the difference value between the upper limit output voltage and the boundary reference voltage is less than a pre-set difference value.

[0012] According to some embodiments of the present application, the set of preset mapping relationships further includes a second preset mapping relationship, and the operating frequency range corresponding to the second preset mapping relationship is less than or equal to the first preset frequency.

[0013] According to some embodiments of the present application, the output voltage corresponding to the second preset mapping relationship is a first fixed voltage.

[0014] According to some embodiments of the present application, the set of preset mapping relationships further includes a third preset mapping relationship, and the operating frequency range corresponding to the third preset mapping relationship is greater than or equal to the second preset frequency.

[0015] According to some embodiments of the present application, the output voltage corresponding to the third preset mapping relationship is a second fixed voltage.

[0016] According to some embodiments of the present application, the rectification and voltage adjustment module further includes a switching module and an inductance module. The switching module is electrically connected to the inductance module. When the power supply circuit is a boost chopper circuit, the switching module is a single switching transistor. Controlling the rectification and voltage adjustment module includes controlling the switching transistor to conduct to charge the inductance module, and after the inductance module is charged for a preset time, controlling the switching transistor to cut off to discharge the inductance module and adjust the output voltage of the rectification and voltage adjustment module.

[0017] According to some embodiments of the present application, the rectifying and voltage regulating module further includes a switching module and an inductance module. The switching module is electrically connected to the inductance module. When the power supply circuit is a totem pole boost circuit, the switching module includes a plurality of switching transistors. Controlling the rectifying and voltage regulating module includes controlling the plurality of switching transistors to conduct according to a preset conduction sequence to charge the inductance module, and after the inductance module is charged for a preset time, controlling the plurality of switching transistors to cut off according to a preset cutoff sequence to discharge the inductance module and adjust the output voltage of the rectifying and voltage regulating module.

[0018] According to a second aspect, an embodiment of the present application provides a controller, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it realizes the control method of the power supply circuit described in the first aspect above.

[0019] According to a third aspect, an embodiment of the present application provides an air conditioner, which includes the controller described in the second aspect above.

[0020] According to a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions are used to execute the control method of the power supply circuit described in the first aspect above.

[0021] Additional aspects and advantages of the present application are partially shown in the following description, partially become apparent in the following description, or are understood by the practice of the present application.

Brief Description of the Drawings

[0022] The drawings are provided to offer a further understanding of the technical solution of this application, and constitute a part of the specification. They are used to interpret the technical solution of this application together with the embodiments of this application, and do not constitute a limitation to the technical solution of this application.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying out the Invention

[0023] The following details the embodiments of this application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to interpret this application and should not be construed as a limitation to this application.

[0024] In the description of this application, when it comes to the description of orientation, for example, the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is the orientation or positional relationship shown based on the drawings, and it is only for the convenience of the description of this application and for the simplification of the description. It is not intended to indicate or imply that the mentioned device or element must have a specific orientation and be configured and operated in a specific orientation, so it should not be understood as a limitation to this application.

[0025] In the description of this application, some meanings are one or more, multiple meanings are two or more, larger, smaller, exceeding, etc. are understood not to include the number, and above, below, within, etc. are understood to include the number. First, second, when described, are only for distinguishing technical features and should not be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the context of the indicated technical features.

[0026] In the description of this application, unless otherwise expressly stated, terms such as installation, attachment, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of these words in this application in connection with the specific content of the technical solution.

[0027] In some cases, current air conditioners generally adopt a boost power element to correct the circuit, improve the power element, increase the load operating voltage and reduce the operating current at the same time. The general load voltage is a fixed value. To prevent the compressor from entering the field weakening control, the voltage is generally set as a relatively high value. At a relatively high bus voltage, the leakage current of the compressor is relatively large, causing damage to the circuit.

[0028] In response to the above situation, the embodiments of the present application propose a control method for a power supply circuit, a controller, an air conditioner, and a readable storage medium, which can adjust the voltage output to a compressor by the power supply circuit based on the current operating frequency of the compressor and a preset set of mapping relationships, reduce leakage current and switching losses, and improve the energy efficiency and service life of the air conditioner.

[0029] Hereinafter, the embodiments of the present application will be further described with reference to the drawings.

[0030] As shown in FIG. 1, FIG. 1 is a schematic diagram of a system architecture platform for executing a control method of a power supply circuit according to an embodiment of the present application.

[0031] The system architecture platform 100 of the embodiments of the present application includes one or more processors 110 and a memory 120. In FIG. 1, one processor 110 and one memory 120 are taken as examples.

[0032] The processor 110 and the memory 120 may be connected by a bus or other means. In FIG. 1, it is taken as an example that they are connected via a bus.

[0033] The memory 120 may be used as a non-transitory computer-readable storage medium to store non-transitory software programs and non-transitory computer-executable programs. Note that the memory 120 may include a high-speed random access memory, and may further include non-transitory memory, such as at least one magnetic disk memory device, a flash memory device, or other non-transitory solid-state memory devices. In some embodiments, the memory 120 selectively includes a memory 120 remotely installed with respect to the processor 110, and these remote memories may be connected to this system architecture platform 100 via a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0034] The device structure shown in FIG. 1 does not constitute a limitation on the system architecture platform 100, and may include more or fewer members than the number of members shown, or a combination of some members, or an arrangement of different members.

[0035] In the system architecture platform 100 shown in FIG. 1, the processor 110 may be used to call a control program stored in the memory 120, thereby implementing a control method for the power supply circuit.

[0036] Based on the hardware structure of the above system architecture platform 100, each embodiment of the power supply circuit of the present application is proposed.

[0037] As shown in FIG. 2, FIG. 2 is a schematic structural diagram of a power supply circuit according to an embodiment of the present application.

[0038] Specifically, the power supply circuit 200 of the embodiment of the present application includes, but is not limited to, a power supply module, an inverter module 220, and a rectification / voltage adjustment module 210. The output terminal of the rectification / voltage adjustment module 210 is connected to the input terminal of the inverter module 220, and the output terminal of the inverter module 220 is electrically connected to the compressor 230. The rectification / voltage adjustment module 210 is used to rectify the alternating current input by the power supply module into direct current and adjust the voltage. The inverter module 220 is used to invert the direct current output by the rectification / voltage adjustment module 210 into alternating current and output it to the compressor 230.

[0039] Regarding the circuit configuration of the above rectification / voltage adjustment module 210, it includes, but is not limited to, a rectification circuit 211, a voltage adjustment circuit 212, and a capacitor module 213. The embodiment of the present application does not specifically limit the circuit configuration of the rectification / voltage adjustment module 210.

[0040] Regarding the above power supply circuit 200, it further includes a controller 240, but is not limited thereto. The controller 240 is connected to the rectification and voltage regulation module 210, and the controller 240 is used to adjust the output voltage of the rectification and voltage regulation module 210.

[0041] Also, regarding the structure of the above controller 240, it may include the processor 110 and the memory 120 shown in FIG. 1.

[0042] In one embodiment, the structure of the controller 240 in the power supply circuit 200 may be as shown in FIG. 3. Specifically, the controller 240 in the power supply circuit 200 of the embodiment of the present application includes, but is not limited to, an MCU unit 241, a control unit 242, and an operating frequency detection unit 243. Here, the MCU unit 241 is connected to the control unit 242 and the operating frequency detection unit 243 respectively. The MCU unit 241 adjusts in real time the voltage output by the rectification and voltage regulation module 210 to the inverter module 220 by the control unit 242. Also, the MCU unit 241 further reads the real-time operating frequency of the compressor 230 by the operating frequency detection unit 243.

[0043] The structures shown in FIGS. 2 and 3 do not constitute limitations on the power supply circuit and the controller 240, and may include more or fewer members than the number of members shown, or combinations of some members, or arrangements of different members.

[0044] Based on the above system architecture platform 100 and the hardware structure of the power supply circuit, each embodiment of the control method of the power supply circuit of the present application is proposed.

[0045] As shown in FIG. 4, FIG. 4 is a flowchart of the control method of the power supply circuit according to one embodiment of the present application. The control method of the power supply circuit according to the embodiment of the present application includes, but is not limited to, step S400, step S410, step S420, and step S430.

[0046] Step S400: Obtain the current operating frequency of the compressor. Step S410: Determine the target mapping relationship corresponding to the current operating frequency from a set of preset mapping relationships. Here, the mapping relationships in the preset set of mapping relationships are used to represent the correspondence between the output voltage of the rectification and voltage adjustment module and the operating frequency of the compressor. Step S420: Determine the target voltage based on the current operating frequency and the target mapping relationship. Step S430: Control the rectification and voltage adjustment module so as to adjust the output voltage of the rectification and voltage adjustment module to the target voltage.

[0047] In some embodiments, the mapping relationship in the preset mapping relationship set is used to represent the correspondence between the output voltage of the rectification and voltage adjustment module and the operating frequency of the compressor. The voltage output to the compressor by the power supply circuit needs to not only meet the voltage requirement of the compressor operating frequency but also ensure that the leakage current is maintained within the standard range. By adjusting the output voltage of the rectification and voltage adjustment module, that is, the input voltage of the inverter module in the power supply circuit, the voltage output to the compressor by the inverter module is further adjusted. The current operating frequency of the compressor is obtained, and based on the obtained current operating frequency, the target mapping relationship is determined from the preset mapping relationship set, and the target mapping relationship corresponds to the obtained current operating frequency. The target voltage is determined based on the determined target mapping relationship and the current operating frequency. This target voltage is a relatively preferable voltage when operating at the current operating frequency of the compressor, which can guarantee the voltage requirement for operating at the current operating frequency of the compressor and ensure that the leakage current meets the standard requirements. By controlling the rectification and voltage adjustment module in the power supply circuit, the output voltage of the rectification and voltage adjustment module is adjusted to the target voltage, and further the compressor is operated at the target voltage. By adjusting the voltage output to the compressor by the power supply circuit based on the current operating frequency of the compressor and the preset mapping relationship set, the leakage current and switching loss can be reduced, and the energy efficiency and service life of the air conditioner can be improved.

[0048] The above target voltage is greater than a first preset voltage and less than a second preset voltage. Here, the first preset voltage is used to represent the output voltage of the rectification and voltage adjustment module corresponding to the compressor entering the field weakening operation state. That is, when the target voltage is less than the first preset voltage, the compressor enters the field weakening operation state. The second preset voltage is used to represent the output voltage of the rectification and voltage adjustment module corresponding to the leakage current of the compressor being greater than a preset leakage current. That is, when the target voltage is greater than the second preset voltage, the leakage current of the compressor is greater than the preset leakage current.

[0049] Regarding the above preset mapping relationship set, it may be preset. Specifically, in the embodiments of the present application, the compressor operates at one operating frequency, tests the leakage current corresponding to different voltages input to the compressor by the power supply circuit, and selects a voltage that satisfies the voltage requirement of the operating frequency and the leakage current satisfies the standard requirement as the target voltage corresponding to this operating frequency. By testing multiple operating frequencies, multiple target voltages corresponding to multiple operating frequencies can be obtained, and further a preset mapping relationship set can be obtained. In addition, another embodiment of the present application obtains the above preset mapping relationship set by simulation calculation, and the embodiments of the present application do not specifically limit the acquisition method of the preset mapping relationship set.

[0050] Also, the voltage requirement of the above operating frequency may be preset. Specifically, in the embodiments of the present application, the compressor operates at one operating frequency, tests the minimum voltage input to the compressor by the power supply circuit, and this voltage may be selected as the voltage requirement of this operating frequency.

[0051] Also, the standard requirement for the above leakage current includes, but is not limited to, the JIS standard (Japanese Industrial Standards). The embodiments of the present application do not specifically limit the standard requirement for the leakage current.

[0052] As shown in FIG. 5, FIG. 5 is a schematic diagram of a curve of a set of preset mapping relationships in a control method of a power supply circuit according to an embodiment of the present application.

[0053] In some embodiments, the set of preset mapping relationships includes a first preset frequency and a second preset frequency. The first preset frequency is point A shown in FIG. 5, and the second preset frequency is point F shown in FIG. 5. The first preset frequency is smaller than the second preset frequency. The first preset frequency and the second preset frequency divide the curve of the set of preset mapping relationships into three parts. The second part in FIG. 5 represents that the set of preset mapping relationships includes a plurality of first preset mapping relationships. In FIG. 5, each of the curves AB, BC, CD, DE, and EF represents one first preset mapping relationship. The operating frequency intervals corresponding to different first preset mapping relationships are different, and the operating frequency intervals of two segments of two consecutive first preset mapping relationships are continuous. The lower limit value of the operating frequency interval corresponding to each first preset mapping relationship is greater than the first preset frequency, and the upper limit value of the operating frequency interval corresponding to each first preset mapping relationship is smaller than the second preset frequency.

[0054] In some embodiments, when the determined target mapping relationship is a first preset mapping relationship, the ratio between the output voltage and the operating frequency in each first preset mapping relationship is a fixed value, and the gradient corresponding to each curve in the second part in the schematic diagram in FIG. 5 is constant, and it is also expressed that the gradients of at least two segments of curves are different.

[0055] In some embodiments, for the convenience of those skilled in the art, the preset set of mapping relationships is expressed in the form of a curve diagram. However, in other embodiments of the present application, the preset set of mapping relationships may be expressed in a table form, and the present application does not specifically limit the expression form of the preset set of mapping relationships.

[0056] In another embodiment of the present application, the first part in FIG. 5 represents that the preset set of mapping relationships includes a second preset mapping relationship. The upper limit value of the operating frequency range corresponding to the second preset mapping relationship is below the first preset frequency. The output voltage corresponding to the second preset mapping relationship is a first fixed voltage. When the currently obtained operating frequency of the compressor is below the first preset frequency, that is, when the determined target mapping relationship is the second preset mapping relationship. When the compressor is at a relatively low operating frequency, the refrigerant fluidity is relatively poor, the parasitic capacitance of the compressor becomes large, and adopting an output voltage with a relatively high voltage value will cause the leakage current to be higher than the standard requirement. Therefore, when the current operating frequency is below the first preset frequency and the output voltage of the rectification and voltage regulation module is fixed as the first fixed voltage with a relatively low voltage value, it can ensure the voltage requirement for operating at the current operating frequency of the compressor while ensuring that the leakage current meets the standard requirement, reduce the leakage current and switching loss, and improve the energy efficiency and service life of the air conditioner.

[0057] In another embodiment of the present application, the third part in FIG. 5 represents that the preset mapping relationship set includes a third preset mapping relationship. The lower limit value of the operating frequency range corresponding to the third preset mapping relationship is greater than or equal to the second preset frequency. The output voltage corresponding to the third preset mapping relationship is the second fixed voltage. When the currently obtained operating frequency of the compressor is greater than or equal to the second preset frequency, that is, when the determined target mapping relationship is the third preset mapping relationship. When the compressor operates at the second preset frequency, the output voltage of the rectification and voltage adjustment module reaches the maximum, that is, the second fixed voltage. When the compressor operates in an operating frequency range greater than the second preset frequency, the output voltage of the rectification and voltage adjustment module cannot increase further and is fixed as the second fixed voltage.

[0058] Regarding the above first preset frequency and second preset frequency, when performing the preset test setting of the preset mapping relationship set, it may be determined based on the operating characteristics of the compressor and the circuit characteristics of the power supply circuit. Exemplarily, when the rectification and voltage adjustment module in the power supply circuit is not performing boost processing, the corresponding maximum compression operating frequency may be selected as the first preset frequency, and the maximum compression operating frequency at this time may be determined by the voltage requirement of the operating frequency of the compressor. When the rectification and voltage adjustment module in the power supply circuit is performing boost processing, the minimum compressor operating frequency corresponding to the maximum output voltage of the rectification and voltage adjustment module may be selected as the second preset frequency, and the minimum compressor operating frequency at this time may be determined by the specification requirements of the leakage current. When performing the simulation calculation of the preset mapping relationship set, it may be determined by the two characteristic frequency values obtained by calculation. The present application does not specifically limit the determination of the first preset frequency and the second preset frequency.

[0059] Also, regarding the determination of the first fixed voltage and the second fixed voltage, it may be determined based on the circuit characteristics of the power supply circuit. Exemplarily, the first fixed voltage is the voltage output by the power supply circuit to the compressor when the rectification / voltage regulation module in the power supply circuit is not performing boost processing, and the second fixed voltage is the maximum output voltage reached after the rectification / voltage regulation module in the power supply circuit performs boost processing. When performing simulation calculations, it may also be determined by two characteristic voltage values obtained through calculation. This application does not specifically limit the determination of the first fixed voltage and the second fixed voltage.

[0060] As shown in FIG. 6, FIG. 6 is a flowchart of the acquisition step of the first preset mapping relationship according to another embodiment of this application. The acquisition step of the first preset mapping relationship according to the embodiment of this application includes, but is not limited to, step S600 and step S610.

[0061] Step S600: Obtain the first preset frequency and the second preset frequency, and determine a plurality of operating frequency intervals arranged in sequence based on the first preset frequency and the second preset frequency. Step S610: For each operating frequency interval, determine the boundary operating frequencies at both ends of the operating frequency interval, determine the boundary reference voltage based on the boundary operating frequencies, and determine the first preset mapping relationship corresponding to the operating frequency interval based on the boundary reference voltage.

[0062] In some embodiments, the acquisition step of the first preset mapping relationship includes obtaining the first preset frequency and the second preset frequency, and determining a plurality of operating frequency intervals arranged in sequence based on the first preset frequency and the second preset frequency, and for each operating frequency interval, determining the boundary operating frequencies at both ends of the operating frequency interval, determining the boundary reference voltage based on the boundary operating frequencies, and determining the first preset mapping relationship corresponding to the operating frequency interval based on the boundary reference voltage.

[0063] Determining the boundary reference voltage based on the above-mentioned boundary operating frequency includes determining the lower limit output voltage of the rectification and voltage adjustment module corresponding to the compressor entering the weak field operation state at the boundary operating frequency, determining the upper limit output voltage of the rectification and voltage adjustment module corresponding to the leakage current at the boundary operating frequency of the compressor being greater than a preset leakage current, and determining the boundary reference voltage from between the lower limit output voltage and the upper limit output voltage. Here, the difference value between the upper limit output voltage and the boundary reference voltage is smaller than a preset difference value. Further, it is ensured that when the compressor operates at the boundary reference voltage, the voltage value is not too low to enter the weak field operation state, and the voltage value is not too high to cause the leakage current to be too large. Also, since the difference value between the upper limit output voltage and the boundary reference voltage is smaller than a preset difference value, the compressor can operate at a relatively high voltage value when the leakage current meets the requirements, improving the operating efficiency of the compressor.

[0064] As shown in FIGS. 7 and 8, FIG. 7 is a specific circuit diagram of a power supply circuit according to an embodiment of the present application, and FIG. 8 is a flowchart of a control method for the power supply circuit according to another embodiment of the present application. The control method for the power supply circuit according to the embodiment of the present application includes, but is not limited to, step S800 and step S810.

[0065] Step S800: Control the switching transistor to conduct to charge the inductance module. Step S810: After the inductance module is charged for a preset time, control the switching transistor to cut off to discharge the inductance module and adjust the output voltage of the rectification and voltage adjustment module.

[0066] In some embodiments, the power supply circuit includes a power supply module, which includes, but is not limited to, an AC power supply. The power supply circuit further includes an inverter module (i.e., the inverter bridge in FIG. 7) and a rectifying and voltage regulating module, and the rectifying and voltage regulating module includes a rectifying circuit, a switching module, an inductance module and a capacitance module. As shown in the circuit in FIG. 7, the power supply circuit is a boost chopper circuit, i.e., a BOOST boost circuit. The switching module is one switching transistor Q1. The power supply module is electrically connected to the rectifying circuit, and the rectifying circuit is composed of four diodes D1 to D4, which convert AC power into DC power. The inductance module is composed of one inductance L, and both ends of the inductance module are connected to the rectifying circuit and the switching module respectively. When the switching module conducts, it is equivalent to one end of the inductance module being grounded, and the inductance module is charged. After the charging time of the inductance module reaches the preset time, the switching transistor is turned off, which is equivalent to a part of the circuit of the switching module being turned off, and the inductance module charges the capacitance module. The capacitance module is composed of one capacitor C, and the voltage across both ends of the capacitance module increases, completing the boost process and further adjusting the output voltage of the rectifying and voltage regulating module. Also, a FRD diode (Fast Recovery Diode) is installed between the inductance module and the capacitance module to prevent the capacitance module from discharging to the ground when the switching module conducts. The DC output terminal of the rectifying and voltage regulating module is electrically connected to the input terminal of the inverter module, and the DC power output by the rectifying and voltage regulating module is converted into AC power through the inverter module, and the output terminal of the inverter module is electrically connected to the compressor.

[0067] In some embodiments, the above switching module is connected to a controller, and the controller controls the charging time and discharging time of the inductance module by controlling the conduction time and blocking time of the switching module, and further controls the output voltage of the rectification and voltage regulation module.

[0068] As shown in FIGS. 9 and 10, FIG. 9 is a specific circuit diagram of a power supply circuit according to another embodiment of the present application, and FIG. 10 is a flowchart of a control method of a power supply circuit according to another embodiment of the present application. The control method of the power supply circuit according to the embodiment of the present application includes, but is not limited to, step S1000 and step S1010.

[0069] Step S1000: Control a plurality of switching transistors to conduct according to a preset conduction sequence to charge the inductance module. Step S1010: After the inductance module is charged for a preset time, control a plurality of switching transistors to block according to a preset blocking sequence to discharge the inductance module and adjust the output voltage of the rectification and voltage regulation module.

[0070] In some embodiments, the power supply circuit includes a power supply module, which includes, but is not limited to, an AC power supply. The power supply circuit further includes an inverter module (i.e., the inverter bridge in FIG. 9) and a rectifier / voltage regulator module, and the rectifier / voltage regulator module includes a switching module, an inductance module, and a capacitance module. As shown in the circuit in FIG. 9, the power supply circuit is a totem pole boost circuit, and the switching module consists of four switching transistors Q1 to Q4. The switching module also functions as a rectifier to convert AC power to DC power. The inductance module consists of one inductance L, and both ends of the inductance module are connected to the power supply module and the switching module respectively. By controlling the four switching transistors to conduct according to a preset conduction sequence, the inductance module is charged. After the charging time of the inductance module reaches a preset time, the four switching transistors are controlled to cut off according to a preset cutoff sequence to discharge the inductance module and charge the capacitance module. The capacitance module consists of one capacitance C, and the voltage across both ends of the capacitance module increases to complete the boost process and further adjust the output voltage of the rectifier / voltage regulator module. The DC output terminal of the rectifier / voltage regulator module is electrically connected to the input terminal of the inverter module, and the DC power output by the rectifier / voltage regulator module is converted to AC power through the inverter module, and the output terminal of the inverter module is electrically connected to the compressor.

[0071] Also, in some embodiments, the above-mentioned switching module is connected to a controller, and the controller controls the conduction sequence, cutoff sequence, conduction time, and cutoff time of the four switching transistors in the switching module to control the charging and discharging of the inductance module, the charging time and discharging time, and further control the output voltage of the rectifier / voltage regulator module.

[0072] Based on the control methods of the power supply circuits in the above embodiments, the following will respectively propose embodiments of the controller, air conditioner, and computer-readable storage medium of the present application.

[0073] Moreover, one embodiment of the present application provides a controller, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor.

[0074] The processor and the memory may be connected by a bus or other means.

[0075] The controller in this embodiment may include the processor and the memory in the embodiment shown in FIG. 1. Since both belong to the same inventive concept, both have the same implementation principle and beneficial effects, which will not be described in detail here.

[0076] The non-temporary software program and instructions necessary for implementing the control method of the power supply circuit in the above embodiment are stored in the memory and, when executed by the processor, execute the control method of the power supply circuit in the above embodiment.

[0077] The technical solution according to the embodiment of the present application obtains the current operating frequency of the compressor, and determines the corresponding target mapping relationship from a set of pre-set mapping relationships based on the current operating frequency. Since the mapping relationship is used to represent the correspondence between the output voltage of the rectification and voltage adjustment module and the operating frequency of the compressor, the corresponding target mapping relationship determined based on the current operating frequency is the correspondence between the current operating frequency and the target voltage output by the rectification and voltage adjustment module. Further, based on the target mapping relationship and the current operating frequency, the target voltage is determined, and the rectification and voltage adjustment module in the power supply circuit is controlled to adjust the output voltage of the rectification and voltage adjustment module to the target voltage. The target voltage corresponding to the current operating frequency is obtained by the pre-set set of mapping relationships, ensuring that the compressor meets the voltage requirements at the current operating frequency, reducing the leakage circuit and switching losses, and improving the energy efficiency and service life of the air conditioner. The set of mapping relationships for adjustment improves the speed and sensitivity of adjustment in a pre-set manner.

[0078] Therefore, for the specific implementation form and technical effect of the controller in the embodiment of the present application, reference may be made to the specific implementation form and technical effect of the control method of the power supply circuit in any one of the above embodiments.

[0079] It should be noted that the embodiment of the present application further provides an air conditioner. The structure of the air conditioner according to the embodiment of the present application may be the air conditioner structure shown in the embodiment of FIG. 2, or includes the controller in the above embodiment, but is not limited thereto.

[0080] The technical solution according to the embodiment of the present application acquires the current operating frequency of the compressor, and determines the corresponding target mapping relationship from a set of preset mapping relationships based on the current operating frequency. Since the mapping relationship is used to represent the corresponding relationship between the output voltage of the rectification and voltage adjustment module and the operating frequency of the compressor, the corresponding target mapping relationship determined based on the current operating frequency is the corresponding relationship between the current operating frequency and the target voltage output by the rectification and voltage adjustment module. Further, based on the target mapping relationship and the current operating frequency, the target voltage is determined, and the rectification and voltage adjustment module in the power supply circuit is controlled so that the output voltage of the rectification and voltage adjustment module is adjusted to the target voltage. The target voltage corresponding to the current operating frequency is obtained by the preset set of mapping relationships, ensuring that the compressor meets the voltage requirements at the current operating frequency, reducing the leakage circuit and switching losses, and improving the energy efficiency and service life of the air conditioner. The set of mapping relationships for adjustment improves the speed and sensitivity of adjustment in a preset manner.

[0081] For the specific implementation form and technical effect of the air conditioner according to the embodiment of the present application, reference may be made to the specific implementation form and technical effect of the control method of the power supply circuit in any one of the above embodiments.

[0082] In addition, an embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions are used to execute the above control method of the power supply circuit. Exemplarily, the steps of the methods in FIGS. 4, 6, 8, and 10 described above are executed.

[0083] The technical solution according to the embodiment of the present application acquires the current operating frequency of the compressor, and determines the corresponding target mapping relationship from a set of preset mapping relationships based on the current operating frequency. Since the mapping relationship is used to represent the corresponding relationship between the output voltage of the rectification and voltage adjustment module and the operating frequency of the compressor, the corresponding target mapping relationship determined based on the current operating frequency is the corresponding relationship between the current operating frequency and the target voltage output by the rectification and voltage adjustment module. Further, based on the target mapping relationship and the current operating frequency, the target voltage is determined, and the rectification and voltage adjustment module in the power supply circuit is controlled to adjust the output voltage of the rectification and voltage adjustment module to the target voltage. By obtaining the target voltage corresponding to the current operating frequency through the preset set of mapping relationships, it is ensured that the compressor meets the voltage requirement of the current operating frequency, while reducing the leakage circuit and switching loss, and improving the energy efficiency and service life of the air conditioner. The set of mapping relationships for adjustment improves the speed and sensitivity of adjustment in a preset manner.

[0084] For the specific implementation form and technical effect of the computer-readable storage medium according to the embodiment of the present application, reference may be made to the specific implementation form and technical effect of the control method of the power supply circuit in any one of the above embodiments.

[0085] All or some of the steps in the method disclosed above, the system may be implemented as software, firmware, hardware and suitable combinations thereof. Some physical assemblies or all physical assemblies may be implemented as software executed by a processor, such as a central processor, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those skilled in the art, the term computer storage medium includes any method or technology implemented volatile and non-volatile, removable and non-removable media for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can store the desired information and is accessible by a computer. It should be noted that, as is well known to those skilled in the art, communication media generally includes computer-readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier or other transmission mechanism, and may also include any information distribution medium.

[0086] In the above, relatively preferred embodiments of the present application have been specifically described. However, the present application is not limited to the above embodiments. Those skilled in the art may make various equivalent modifications or replacements without violating the spirit of the present application. All of these equivalent modifications or replacements are included within the scope defined by the claims of the present application.

Claims

Claim 1 A method for controlling a power supply circuit, wherein the power supply circuit includes a rectification / voltage adjustment module and an inverter module, the rectification / voltage adjustment module is provided with an AC input terminal, a capacitance module, and a DC output terminal, the AC input terminal is used to connect to an AC power supply, the capacitance module is connected to an input terminal of the inverter module via the DC output terminal, an output terminal of the inverter module is used for electrical connection with a compressor, and the control method includes: acquiring the current operating frequency of the compressor; determining a target mapping relationship corresponding to the current operating frequency from a preset set of mapping relationships, wherein the mapping relationships in the preset set of mapping relationships are used to represent the correspondence between the output voltage of the rectification / voltage adjustment module and the operating frequency of the compressor; determining a target voltage based on the current operating frequency and the target mapping relationship; controlling the rectification / voltage adjustment module to adjust the output voltage of the rectification / voltage adjustment module to the target voltage. A method for controlling a power supply circuit including the above steps. Claim 2 The target voltage is greater than a first preset voltage and less than a second preset voltage. The first preset voltage is used to represent the output voltage of the rectification / voltage adjustment module corresponding to the compressor entering a weak field operation state, and the second preset voltage is used to represent the output voltage of the rectification / voltage adjustment module corresponding to the leakage current of the compressor being greater than a preset leakage current. The method for controlling a power supply circuit according to Claim 1. Claim 3 The preset set of mapping relationships includes a plurality of first preset mapping relationships. Different first preset mapping relationships correspond to different operating frequency intervals. Each operating frequency interval corresponding to a first preset mapping relationship is greater than a first preset frequency and less than a second preset frequency. The first preset frequency is less than the second preset frequency. The method for controlling a power supply circuit according to Claim 1. Claim 4 For each of the foregoing first preset mapping relationships, the ratio between the output voltage corresponding to the first preset mapping relationship and the operating frequency is a fixed value. The control method of the power supply circuit according to claim 3.

5. The plurality of first preset mapping relationships are obtaining the first preset frequency and the second preset frequency, and determining a plurality of the operating frequency intervals arranged in order based on the first preset frequency and the second preset frequency; For each of the operating frequency intervals, determining boundary operating frequencies at both ends of the operating frequency interval, determining a boundary reference voltage based on the boundary operating frequencies, and determining the first preset mapping relationship corresponding to the operating frequency interval based on the boundary reference voltage. The control method of the power supply circuit according to claim 3 or 4, obtained by

6. Determining the boundary reference voltage based on the boundary operating frequencies is determining the lower limit output voltage of the rectification / voltage adjustment module corresponding to the compressor entering the field weakening operation state at the boundary operating frequency, determining the upper limit output voltage of the rectification / voltage adjustment module corresponding to the leakage current of the compressor at the boundary operating frequency being greater than a preset leakage current, and determining a boundary reference voltage from between the lower limit output voltage and the upper limit output voltage, wherein the difference value between the upper limit output voltage and the boundary reference voltage is smaller than a preset difference value. The control method of the power supply circuit according to claim 5.

7. The preset mapping relationship set further includes a second preset mapping relationship, and the operating frequency interval corresponding to the second preset mapping relationship is equal to or lower than the first preset frequency. The control method of the power supply circuit according to claim 3.

8. The output voltage corresponding to the second preset mapping relationship is a first fixed voltage. The control method of the power supply circuit according to claim 7.

9. The preset mapping relationship set further includes a third preset mapping relationship, and the operating frequency interval corresponding to the third preset mapping relationship is equal to or higher than the second preset frequency. The control method of the power supply circuit according to claim 3.

10. The control method of the power supply circuit according to claim 9, wherein the output voltage corresponding to the third preset mapping relationship is a second fixed voltage.

11. The rectifying / voltage adjusting module further includes a switching module and an inductance module. The switching module is electrically connected to the inductance module. When the power supply circuit is a boost chopper circuit, the switching module is one switching transistor, Controlling the rectifying / voltage adjusting module includes: Controlling the switching transistor to conduct to charge the inductance module; After the inductance module is charged for a preset time, controlling the switching transistor to cut off to discharge the inductance module and adjusting the output voltage of the rectifying / voltage adjusting module, which is the control method of the power supply circuit according to claim 1.

12. The rectifying / voltage adjusting module further includes a switching module and an inductance module. The switching module is electrically connected to the inductance module. When the power supply circuit is a totem pole boost circuit, the switching module is a plurality of switching transistors, Controlling the rectifying / voltage adjusting module includes: Controlling a plurality of the switching transistors to conduct according to a preset conduction sequence to charge the inductance module; After the inductance module is charged for a preset time, controlling a plurality of the switching transistors to cut off according to a preset cut-off sequence to discharge the inductance module and adjusting the output voltage of the rectifying / voltage adjusting module, which is the control method of the power supply circuit according to claim 1.

13. A controller including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the control method of the power supply circuit according to any one of claims 1 to 12 is realized.

14. An air conditioner including the controller according to claim 13.

15. A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the power supply circuit control method according to any one of claims 1 to 12.

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