Air conditioner control circuit, air conditioner control method, circuit board and air conditioner

Abstract

This invention discloses an air conditioner control circuit, an air conditioner control method, a circuit board, and an air conditioner. In this embodiment, the air conditioner control circuit utilizes a rectifier module to rectify the AC power input from the AC input terminal. After energy storage through an energy storage module, the rectifier supplies power to the compressor module. The rectifier module, by incorporating a three-phase rectifier bridge and a bidirectional switching assembly, allows for the control of the bidirectional switching assembly to ensure that the voltage and current input from the AC input terminal are in phase, thereby resolving harmonic issues. Furthermore, since the bidirectional switching assembly of the rectifier module is connected between the first and second capacitors, it helps reduce the losses of the bidirectional switching assembly and improves the circuit efficiency.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an air conditioner control circuit, an air conditioner control method, a circuit board, and an air conditioner. Background Technology

[0002] Currently, the common rectifier topology in three-phase power-powered air conditioners is a three-phase uncontrolled rectifier bridge. This topology is generally composed of rectifier diodes, which can convert three-phase AC power into DC power to supply the compressor. Because diodes are non-linear devices, the conduction current and input voltage waveforms are inconsistent, causing the rectifier to inject a large amount of harmonics into the power grid, polluting the power grid environment and failing to meet electromagnetic compatibility standards. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0004] This invention provides an air conditioner control circuit, an air conditioner control method, a circuit board, and an air conditioner, which can improve harmonic problems.

[0005] In a first aspect, embodiments of the present invention provide an air conditioner control circuit, comprising:

[0006] A rectifier module, comprising a three-phase rectifier bridge and a bidirectional switch assembly, wherein the three-phase rectifier bridge comprises a first bridge arm, a second bridge arm, and a third bridge arm connected in parallel; the bidirectional switch assembly comprises a first bidirectional switch, a second bidirectional switch, and a third bidirectional switch, wherein one end of the first bidirectional switch is connected to the midpoint of the first bridge arm, one end of the second bidirectional switch is connected to the midpoint of the second bridge arm, and one end of the third bidirectional switch is connected to the midpoint of the third bridge arm;

[0007] An energy storage module is connected in parallel with the three-phase rectifier bridge. The energy storage module includes a first capacitor and a second capacitor connected in series. The other ends of the first bidirectional switch, the second bidirectional switch, and the third bidirectional switch are all connected between the first capacitor and the second capacitor.

[0008] An AC input terminal is connected to the rectifier module;

[0009] A DC output terminal is connected to the energy storage module.

[0010] A compressor module, which is connected to the DC output terminal.

[0011] The air conditioner control circuit provided in this embodiment of the invention has at least the following beneficial effects: The air conditioner control circuit of this embodiment utilizes a rectifier module to rectify the AC power input from the AC input terminal, stores energy through an energy storage module, and then supplies power to the compressor module. The rectifier module, by setting a three-phase rectifier bridge and a bidirectional switching assembly, can ensure that the voltage and current input from the AC input terminal are in phase, thereby solving the harmonic problem. Furthermore, since the bidirectional switching assembly of the rectifier module is connected between the first and second capacitors, it helps to reduce the losses of the bidirectional switching assembly and improve the circuit efficiency.

[0012] In some embodiments of the present invention, the air conditioner control circuit further includes:

[0013] An inductor is used, and the AC input terminal is connected to the rectifier module through the inductor.

[0014] In the above technical solution, by setting an inductor between the AC input terminal and the rectifier module, it is beneficial to filter out harmonics and further improve the harmonic problem.

[0015] In some embodiments of the present invention, the air conditioner control circuit further includes:

[0016] An auxiliary power module includes an auxiliary power input terminal, a two-phase rectifier bridge, and a power supply component. The auxiliary power input terminal is connected to the AC input terminal and the two-phase rectifier bridge, respectively. The two-phase rectifier bridge is connected in parallel with the power supply component.

[0017] In the above technical solution, by setting up an auxiliary power module, the auxiliary power module can be used to supply power to other loads, and the auxiliary power module is connected to the AC input terminal, so it can draw power from the AC input terminal, which is beneficial to improving the equipment efficiency of the air conditioner.

[0018] In some embodiments of the present invention, the AC input terminal includes a first phase input terminal, a second phase input terminal and a third phase input terminal, the auxiliary power input terminal includes a fourth phase input terminal and a fifth phase input terminal, and the two-phase rectifier bridge includes a fourth bridge arm and a fifth bridge arm;

[0019] The fourth phase input terminal is connected to any one of the first phase input terminal, the second phase input terminal, and the third phase input terminal, and the fourth phase input terminal is also connected to the midpoint of the fourth bridge arm; the fifth phase input terminal is also connected to the midpoint of the fifth bridge arm. Alternatively, the fourth phase input terminal and the fifth phase input terminal are respectively connected to any two of the first phase input terminal, the second phase input terminal, and the third phase input terminal, and the fourth phase input terminal is also connected to the midpoint of the fourth bridge arm, and the fifth phase input terminal is also connected to the midpoint of the fifth bridge arm.

[0020] In the above technical solution, the fourth phase input terminal is connected to any one of the first phase input terminal, the second phase input terminal, and the third phase input terminal. That is, the auxiliary power module adopts phase voltage power supply mode, which has low voltage and high current, which is beneficial to reduce the specification requirements of components and reduce costs. On the other hand, the fourth phase input terminal and the fifth phase input terminal are respectively connected to any two of the first phase input terminal, the second phase input terminal, and the third phase input terminal. That is, the auxiliary power module adopts line voltage power supply mode, which has high voltage and low current, high safety, and can avoid the occurrence of incorrect wiring.

[0021] In some embodiments of the present invention, the air conditioner control circuit further includes:

[0022] The first fan module includes a DC fan and a first drive assembly for driving the DC fan, wherein the first drive assembly is connected in parallel with the two-phase rectifier bridge.

[0023] In the above technical solution, the air conditioner control circuit also includes a first fan module, which draws power from an auxiliary power supply. Since the auxiliary power supply is equipped with a two-phase rectifier bridge, it can output DC power, allowing the first fan module to use a DC fan, which facilitates the control of the fan speed.

[0024] In some embodiments of the present invention, the air conditioner control circuit further includes:

[0025] The second fan module includes an AC fan and a second drive component for driving the AC fan. The second drive component is connected to the AC input terminal and the AC fan, respectively.

[0026] In the above technical solution, the second fan module uses an AC fan, which has the advantage of stable operation.

[0027] In some embodiments of the present invention, the AC input terminal includes a first phase input terminal, a second phase input terminal, and a third phase input terminal;

[0028] The second driving component is connected to any one of the first phase input terminal, the second phase input terminal, and the third phase input terminal; or, the second driving component is connected to any two of the first phase input terminal, the second phase input terminal, and the third phase input terminal.

[0029] In the above technical solution, the second drive component is connected to any one of the first phase input terminal, the second phase input terminal, and the third phase input terminal, that is, the second fan module adopts phase voltage power supply mode, which has low voltage and high current, which is beneficial to reduce the specification requirements of components and reduce costs; the second drive component is connected to any two of the first phase input terminal, the second phase input terminal, and the third phase input terminal, that is, the second fan module adopts line voltage power supply mode, which has high voltage and low current, high safety, and can avoid the occurrence of incorrect wiring.

[0030] In some embodiments of the present invention, the air conditioner control circuit further includes:

[0031] The detection module is used to detect at least one of the voltage value of the AC input terminal, the current value of the AC input terminal, and the voltage value of the DC output terminal.

[0032] In the above technical solution, by setting a detection module to detect the voltage value of the AC input terminal, the current value of the AC input terminal, and the voltage value of the DC output terminal, it is convenient to control the bidirectional switching component based on the detected voltage value of the AC input terminal, the current value of the AC input terminal, and the voltage value of the DC output terminal, thereby better realizing the control of the rectifier module.

[0033] Secondly, embodiments of the present invention also provide an air conditioner control method, applied to the air conditioner control circuit described in the first aspect. The air conditioner control method includes:

[0034] A drive signal is sent to the bidirectional switch assembly, the drive signal being used to control the synchronous drive of any one of the first bidirectional switch, the second bidirectional switch, or the third bidirectional switch.

[0035] The air conditioner control method provided in this embodiment of the invention has at least the following beneficial effects: The air conditioner control method in this embodiment of the invention sends a drive signal to the bidirectional switch assembly, the drive signal being used to control any one of the first bidirectional switch, the second bidirectional switch, or the third bidirectional switch to drive synchronously, so that the voltage input from the AC input terminal is in phase with the waveform of the input current, thereby solving the harmonic problem.

[0036] Thirdly, embodiments of the present invention also provide a circuit board including the air conditioner control circuit described in the first aspect. Alternatively, it includes at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform the air conditioner control method described in the second aspect.

[0037] Therefore, the circuit board in this embodiment of the invention utilizes a rectifier module to rectify the AC power input from the AC input terminal, stores the energy through an energy storage module, and then supplies power to the compressor module. The rectifier module, by setting up a three-phase rectifier bridge and a bidirectional switching assembly, can control the bidirectional switching assembly to ensure that the voltage and current input from the AC input terminal are in phase, thereby solving the harmonic problem. Furthermore, since the bidirectional switching assembly of the rectifier module is connected between the first and second capacitors, it helps to reduce the losses of the bidirectional switching assembly and improve the efficiency of the circuit.

[0038] Fourthly, embodiments of the present invention also provide an air conditioner, including the air conditioner control circuit of the first aspect. Therefore, the air conditioner of this embodiment utilizes a rectifier module to rectify the AC power input from the AC input terminal, stores energy through an energy storage module, and then supplies power to the compressor module. The rectifier module, by setting a three-phase rectifier bridge and a bidirectional switching assembly, can ensure that the voltage input from the AC input terminal is in phase with the input current waveform through control of the bidirectional switching assembly, thereby solving the harmonic problem. Furthermore, since the bidirectional switching assembly of the rectifier module is connected between the first capacitor and the second capacitor, it helps to reduce the losses of the bidirectional switching assembly and improve the efficiency of the circuit.

[0039] Fifthly, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the air conditioner control method described in the second aspect.

[0040] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0041] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0042] Figure 1 This is a circuit diagram of a three-phase uncontrolled rectifier bridge in the prior art provided by an embodiment of the present invention;

[0043] Figure 2 This is a circuit diagram of the air conditioner control circuit provided in an embodiment of the present invention;

[0044] Figure 3 This is another circuit schematic diagram of the air conditioner control circuit provided in the embodiment of the present invention;

[0045] Figure 4 This is another circuit schematic diagram of the air conditioner control circuit provided in the embodiment of the present invention;

[0046] Figure 5 This is another circuit schematic diagram of the air conditioner control circuit provided in the embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the driving principle of the first to sixth switching transistors provided in an embodiment of the present invention;

[0048] Figure 7 This is a flowchart of the air conditioner control method provided in an embodiment of the present invention;

[0049] Figure 8 This is an exemplary drive signal waveform diagram of a bidirectional switching assembly provided in an embodiment of the present invention (taking the first and second switching transistors as examples).

[0050] Figure 9 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of the present invention. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0052] It should be understood that in the description of the embodiments of the present invention, "multiple" (or "amounts") means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first," "second," etc., are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0053] Reference Figure 1 This is a three-phase uncontrolled rectifier bridge in existing technology. This topology is generally composed of rectifier diodes and can convert three-phase AC power into DC power to supply power to the compressor. Since diodes are nonlinear devices, the conduction current and input voltage waveforms are inconsistent, causing the rectifier to inject a large amount of harmonics into the power grid, polluting the power grid environment and failing to meet electromagnetic compatibility standards.

[0054] Based on this, refer to Figure 2This invention provides an air conditioner control circuit, including a rectifier module 201, an energy storage module 202, an AC input terminal, a DC output terminal 203, and a compressor module 204. The rectifier module 201 includes a three-phase rectifier bridge and a bidirectional switch assembly. The three-phase rectifier bridge includes a first bridge arm 2011, a second bridge arm 2012, and a third bridge arm 2013 connected in parallel. The bidirectional switch assembly includes a first bidirectional switch 2014, a second bidirectional switch 2015, and a third bidirectional switch 2016. One end of the first bidirectional switch 2014 is connected to the midpoint of the first bridge arm 2011, and the second bidirectional switch 2015... One end of switch 5 is connected to the midpoint of the second bridge arm 2012, and one end of the third bidirectional switch 2016 is connected to the midpoint of the third bridge arm 2013. The energy storage module 202 is connected in parallel with the three-phase rectifier bridge. The energy storage module 202 includes a first capacitor C1 and a second capacitor C2 connected in series. The other ends of the first bidirectional switch 2014, the second bidirectional switch 2015, and the third bidirectional switch 2016 are all connected between the first capacitor C1 and the second capacitor C2. The AC input terminal is connected to the rectifier module 201, the DC output terminal 203 is connected to the energy storage module 202, and the compressor module 204 is connected to the DC output terminal 203.

[0055] It can be understood that the AC input terminals include a first phase input terminal 2051, a second phase input terminal 2052, and a third phase input terminal 2053. The first bridge arm 2011 includes a first diode D1 and a second diode D2 connected in series. The second bridge arm 2012 includes a third diode D3 and a fourth diode D4 connected in series. The third bridge arm 2013 includes a fifth diode D5 and a sixth diode D6 connected in series. One end of the first bidirectional switch 2014 is connected to the midpoint of the first bridge arm 2011, that is, one end of the first bidirectional switch 2014 is connected between the first diode D1 and the second diode D2. One end of the second bidirectional switch 2015... The midpoint of the second bridge arm 2012 is connected, that is, one end of the second bidirectional switch 2015 is connected between the third diode D3 and the fourth diode D4; one end of the third bidirectional switch 2016 is connected to the midpoint of the third bridge arm 2013, that is, one end of the third bidirectional switch 2016 is connected between the fifth diode D5 and the sixth diode D6; one end of the first bidirectional switch 2014 is connected between the first diode D1 and the second diode D2, one end of the second bidirectional switch 2015 is connected between the third diode D3 and the fourth diode D4, and one end of the third bidirectional switch 2016 is connected between the fifth diode D5 and the sixth diode D6. The AC input terminals are used to connect to three-phase AC mains power. Specifically, the first phase input terminal 2051, the second phase input terminal 2052, and the third phase input terminal 2053 are connected to the A, B, and C phase AC mains power, respectively. The first capacitor C1 and the second capacitor C2 are electrolytic capacitors. The positive terminal of the first capacitor C1 is connected to the negative terminals of the first diode D1, the third diode D3, and the fifth diode D5, respectively. The negative terminal of the second capacitor C2 is connected to the negative terminals of the second diode D2, the third diode D3, and the sixth diode D6, respectively. After rectification by the rectifier module 201, the three-phase AC mains power outputs a DC signal to supply the compressor module 204. The DC output terminal 203 can be the positive terminal of the first capacitor C1, the common terminal of the first capacitor C1 and the second capacitor C2, or the negative terminal of the second capacitor C2. The common terminal of the first capacitor C1 and the second capacitor C2 can be connected to the neutral wire or not, depending on the actual requirements. The compressor module 204 includes a compressor 2042 and a first IPM module 2031. The DC signal output from the DC output terminal 203 supplies power to the compressor 2042 through the first IPM module 2041. It can be understood that there can be one or more compressor modules 204.

[0056] It is understood that the first bidirectional switch 2014, the second bidirectional switch 2015, and the third bidirectional switch 2016 may include two switching transistors. The first bidirectional switch 2014 includes a first switching transistor T1 and a second switching transistor T2, with the emitters of the first switching transistor T1 and the second switching transistor T2 connected together. The collector of the first switching transistor T1 is connected to the common terminal of the first diode D1 and the second diode D2, and the collector of the second switching transistor T2 is connected to the common terminal of the first capacitor C1 and the second capacitor C2. Alternatively, it is understood that the collectors of the first switching transistor T1 and the second switching transistor T2 may be connected together, with the emitter of the first switching transistor T1 connected to the common terminal of the first diode D1 and the second diode D2, and the emitter of the second switching transistor T2 connected to the common terminal of the first capacitor C1 and the second capacitor C2. The first bidirectional switch 2014 can be implemented using an insulated-gate bipolar transistor (IGBT), an integrated gate commutated thyristor (IGCT), or a metal-oxide-semiconductor field-effect transistor (MOSFET). It is understood that when the first bidirectional switch 2014 uses a MOSFET, the connection between the emitters of the first switch T1 and the second switch T2 is changed to the connection between their sources. Alternatively, the connection between the collectors of the first switch T1 and the second switch T2 is changed to the connection between their drains. Furthermore, the first bidirectional switch 2014 can also be implemented using parallel reverse-resistance switches.

[0057] The second bidirectional switch 2015 includes a third switch transistor T3 and a fourth switch transistor T4. The emitters of the third switch transistor T3 and the fourth switch transistor T4 are connected. The collector of the third switch transistor T3 is connected to the common terminal of the third diode D3 and the fourth diode D4. The collector of the fourth switch transistor T4 is connected to the common terminal of the first capacitor C1 and the second capacitor C2. Alternatively, the collectors of the third switch transistor T3 and the fourth switch transistor T4 can be connected, the emitter of the third switch transistor T3 can be connected to the common terminal of the third diode D3 and the fourth diode D4, and the emitter of the fourth switch transistor T4 can be connected to the common terminal of the first capacitor C1 and the second capacitor C2. The second bidirectional switch 2015 can be an insulated-gate bipolar transistor (IGBT), an integrated gate commutated thyristor (IGCT), or a metal-oxide-semiconductor field-effect transistor (MOSFET). When the second bidirectional switch 2015 uses a MOSFET, the connection of the emitters of the third switch transistor T3 and the fourth switch transistor T4 is replaced by the connection of their sources. Alternatively, the collectors of the third switch T3 and the fourth switch T4 can be connected, which is equivalent to connecting the drains of the third switch T3 and the fourth switch T4. Furthermore, the second bidirectional switch 2015 can also be implemented using parallel reverse-resistance type switches.

[0058] The third bidirectional switch 2016 includes a fifth switch transistor T5 and a sixth switch transistor T6. The emitters of the fifth and sixth switches T5 are connected, the collector of the fifth switch transistor T5 is connected to the common terminal of the fifth and sixth diodes D5 and D6, and the collector of the sixth switch transistor T6 is connected to the common terminal of the first capacitor C1 and the second capacitor C2. Alternatively, the collectors of the fifth and sixth switches T5 can be connected, the emitter of the fifth switch transistor T5 can be connected to the common terminal of the fifth and sixth diodes D5 and D6, and the emitter of the sixth switch transistor T6 can be connected to the common terminal of the first and second capacitors C1 and C2. The third bidirectional switch 2016 can employ an insulated-gate bipolar transistor (IGBT), an integrated gate commutated thyristor (IGCT), or a metal-oxide-semiconductor field-effect transistor (MOSFET). When the third bidirectional switch 2016 uses a MOSFET, the connection of the emitters of the fifth and sixth switches T5 is replaced by the connection of their sources. Alternatively, the collectors of the fifth switch T5 and the sixth switch T6 can be connected, which is equivalent to connecting the drains of the fifth switch T5 and the sixth switch T6. Furthermore, the third bidirectional switch 2016 can also be implemented using parallel reverse-resistance type switches.

[0059] It should be noted that the first switch T1, the second switch T2, the third switch T3, the fourth switch T4, the fifth switch T5, and the sixth switch T6 are all connected in anti-parallel with diodes.

[0060] It is understood that the AC input terminal is connected to the rectifier module 201 via inductor 206. By placing inductor 206 between the AC input terminal and the rectifier module 201, it is beneficial to filter out harmonics and further improve the harmonic problem. Specifically, inductor 206 includes a first inductor L1, a second inductor L2, and a third inductor L3. The first inductor L1 is connected to the first phase input terminal 2051, the second inductor L2 is connected to the second phase input terminal 2052, and the third inductor L3 is connected to the third phase input terminal 2053.

[0061] It is understood that the aforementioned air conditioner control circuit may also include an auxiliary power supply module and a first fan module 209. The auxiliary power supply module includes an auxiliary power input terminal, a two-phase rectifier bridge, and a power supply component 208. The auxiliary power input terminal is connected to both the AC input terminal and the two-phase rectifier bridge, and the two-phase rectifier bridge is connected in parallel with the power supply component 208. By setting up the auxiliary power supply module, it can be used to supply power to other loads. Furthermore, since the auxiliary power supply module is connected to the AC input terminal, it can draw power from the AC input terminal, which helps improve the equipment efficiency of the air conditioner. The power supply component 208 is a common power supply circuit in the prior art, including components such as power chips and voltage regulator chips, which will not be described in detail here.

[0062] It can be understood that the auxiliary power input terminal includes a fourth phase input terminal 2101 and a fifth phase input terminal 2102, and the two-phase rectifier bridge includes a fourth bridge arm 2071 and a fifth bridge arm 2072. The fourth bridge arm 2071 includes a seventh diode D7 and an eighth diode D8 connected in series, and the fifth bridge arm 2072 includes a ninth diode D9 and a tenth diode D10 connected in series. The fourth phase input terminal 2101 is connected to the midpoint of the third phase input terminal 2053 and the fourth bridge arm 2071, respectively. The fourth phase input terminal 2101 is connected to the midpoint of the fourth bridge arm 2071, that is, the fourth phase input terminal 2101 is connected between the seventh diode D7 and the eighth diode D8. The fifth phase input terminal 2102 is connected to the midpoint of the fifth bridge arm 2072, that is, the fifth phase input terminal 2102 is connected between the ninth diode D9 and the tenth diode D10. The fourth phase input terminal 2101 connects to any one of the first phase input terminals 2051, the second phase input terminal 2052, and the third phase input terminal 2053. The fifth phase input terminal 2102 is used to connect to the neutral wire. This means the auxiliary power module operates on a phase voltage-based power supply mode, where low voltage results in high current, which helps reduce component specifications and lower costs. It should be noted that... Figure 2 The following example illustrates the connection between the fourth phase input terminal 2101 and the third phase input terminal 2053 (i.e., the C phase of the mains power).

[0063] It is understood that the first fan module 209 includes a DC fan 2092 and a first drive component for driving the DC fan 2092, the first drive component being connected in parallel with a two-phase rectifier bridge. The air conditioner control circuit also includes the first fan module 209, and the first fan module 209 draws power from an auxiliary power supply. Since the auxiliary power supply has a two-phase rectifier bridge, it can output DC power, allowing the first fan module 209 to use a DC fan 2092, facilitating speed control. The first drive component can be a second IPM module 2091. It is understood that the number of first fan modules 209 can be one or more.

[0064] In addition to phase voltage power supply mode, the auxiliary power module can also be line voltage power supply mode, see reference. Figure 3The auxiliary power input terminal includes a fourth phase input terminal 2101 and a fifth phase input terminal 2102. The two-phase rectifier bridge includes a fourth bridge arm 2071 and a fifth bridge arm 2072. The fourth bridge arm 2071 includes a seventh diode D7 and an eighth diode D8 connected in series. The fifth bridge arm 2072 includes a ninth diode D9 and a tenth diode D10 connected in series. The fourth phase input terminal 2101 is connected to the midpoint of the third phase input terminal 2053 and the fourth bridge arm 2071. The fourth phase input terminal 2101 is connected to the midpoint of the fourth bridge arm 2071, that is, the fourth phase input terminal 2101 is connected between the seventh diode D7 and the eighth diode D8. The fifth phase input terminal 2102 is connected to the midpoint of the fifth bridge arm 2072, that is, the fifth phase input terminal 2102 is connected between the ninth diode D9 and the tenth diode D10. The fourth phase input terminal 2101 and the fifth phase input terminal 2102 are connected to any two of the first phase input terminal 2051, the second phase input terminal 2052 and the third phase input terminal 2053 respectively. That is, the auxiliary power module is a line voltage power supply mode, which has high voltage and low current, high safety and can avoid the occurrence of incorrect wiring. The fourth-phase input terminal 2101 and the fifth-phase input terminal 2102 are respectively connected to any two of the first-phase input terminal 2051, the second-phase input terminal 2052, and the third-phase input terminal 2053. For example, the fourth-phase input terminal 2101 can be connected to the first-phase input terminal 2051 (i.e., mains A phase), and the fifth-phase input terminal 2102 can be connected to the second-phase input terminal 2052 (i.e., mains B phase); or the fourth-phase input terminal 2101 can be connected to the second-phase input terminal 2052 (i.e., mains B phase), and the fifth-phase input terminal 2102 can be connected to the third-phase input terminal 2053 (i.e., mains C phase); or the fourth-phase input terminal 2101 can be connected to the first-phase input terminal 2051 (i.e., mains A phase), and the fifth-phase input terminal 2102 can be connected to the third-phase input terminal 2053 (i.e., mains C phase). It should be noted that... Figure 3 The following example illustrates the connection between the fourth phase input terminal 2101 and the first phase input terminal 2051 (i.e., mains A phase), and the fifth phase input terminal 2102 and the third phase input terminal 2053 (i.e., mains C phase).

[0065] Additionally, it is understood that the aforementioned first fan module 209 can also be replaced by the second fan module 401, as described above. Figure 4The second fan module 401 includes an AC fan 4011 and a second drive assembly for driving the AC fan 4011. The second drive assembly is connected to both the AC input terminal and the AC fan 4011. The second drive assembly can be a starting capacitor and an adapter cable. The second fan module 401 uses the AC fan 4011, which has the advantage of stable operation. Furthermore, the second fan module 401 can draw power independently from the mains. The second drive assembly is connected to any one of the first phase input terminal 2051, the second phase input terminal 2052, and the third phase input terminal 2053. That is, the second fan module 401 uses a phase voltage power draw mode, where lower voltage results in higher current, which helps reduce component specifications and lower costs. It should be noted that... Figure 4 The following example illustrates the connection between the second drive component and the third phase input terminal 2053 (i.e., the C phase of the mains power). It is understood that the number of second fan modules 401 can be one or more.

[0066] In addition to phase voltage power supply mode, the second fan module 401 can also be powered by line voltage, as shown in the reference. Figure 5 The second fan module 401 includes an AC fan 4011 and a second drive assembly for driving the AC fan 4011. The second drive assembly is connected to both the AC input terminal and the AC fan 4011. The second drive assembly can be a starting capacitor and an adapter cable. The second fan module 401 uses the AC fan 4011, which offers the advantage of stable operation. Furthermore, the second fan module 401 can draw power independently from the mains. The second drive assembly is connected to any two of the first phase input terminal 2051, the second phase input terminal 2052, and the third phase input terminal 2053. This means the second fan module 401 operates in a line voltage power supply mode, characterized by high voltage, low current, high safety, and prevention of incorrect wiring. The second drive component is connected to any two of the first phase input terminal 2051, the second phase input terminal 2052, and the third phase input terminal 2053. For example, the second drive component can be connected to the first phase input terminal 2051 (i.e., mains A phase) and the second phase input terminal 2052 (i.e., mains B phase); or the second drive component can be connected to the second phase input terminal 2052 (i.e., mains B phase) and the third phase input terminal 2053 (i.e., mains C phase); or the second drive component can be connected to the first phase input terminal 2051 (i.e., mains A phase) and the third phase input terminal 2053 (i.e., mains C phase). It should be further noted that... Figure 5 The following example illustrates the connection between the second drive component and the first phase input terminal 2051 (i.e., mains A phase) and the third phase input terminal 2053 (i.e., mains C phase).

[0067] In summary, the auxiliary power supply module has two power supply modes: line voltage and phase voltage. The second fan module 401 also has two power supply modes: line voltage and phase voltage. The power supply modes of the auxiliary power supply module and the second fan module 401 are independent of each other. That is, the auxiliary power supply module can use the line voltage power supply mode and the second fan module 401 can use the phase voltage power supply mode; or, the auxiliary power supply module can use the phase voltage power supply mode and the second fan module 401 can use the line voltage power supply mode; or, both the auxiliary power supply module and the second fan module 401 can use the phase voltage power supply mode; or, both the auxiliary power supply module and the second fan module 401 can use the line voltage power supply mode.

[0068] It is understandable that the power input port of the second fan module 401 and the power input port of the auxiliary power supply can be the same, that is, the second drive component is connected to the auxiliary power input terminal. The advantage of this method is that it can reduce the wiring ports of the circuit and improve the wiring efficiency of the circuit.

[0069] It is understood that the aforementioned air conditioner control circuit may also include a detection module (not shown in the attached diagram) for detecting the voltage value at the AC input terminal, the current value at the AC input terminal, and the voltage value at the DC output terminal 203. By setting the detection module to detect the voltage value at the AC input terminal, the current value at the AC input terminal, and the voltage value at the DC output terminal 203, it is easier to control the bidirectional switching component based on the detected voltage value at the AC input terminal, the current value at the AC input terminal, and the voltage value at the DC output terminal 203, thereby better realizing the control of the rectifier module 201. (Refer to...) Figure 6 The detection module can employ a voltage sensor or a current sensor. The voltage or current value detected by the detection module can be sent to the controller. After processing, the controller sends corresponding control pulse signals to the bidirectional switching assembly to control the operation of each switching transistor in the bidirectional switching assembly. For example, taking the first bidirectional switch 2014 as an example, it can control the first switching transistor T1 and the second switching transistor T2 to conduct synchronously or complementaryly, thereby realizing the control of the rectifier module 201.

[0070] Specifically, when sampling the voltage values ​​of the first phase input terminal 2051, the second phase input terminal 2052, and the third phase input terminal 2053 using a voltage sensor, only the voltage values ​​at any two ends of these terminals can be sampled. The voltage value of the third terminal can then be obtained from the voltage values ​​at any two ends, thus saving one voltage sensor and reducing circuit costs. More specifically, based on the principle that the vector sum of the voltage values ​​of the first phase input terminal 2051, the second phase input terminal 2052, and the third phase input terminal 2053 is zero, the voltage value of the remaining terminal can be obtained by inverting the sum of the voltage values ​​at any two ends of these terminals. Similarly, when sampling the current values ​​of the first phase input terminal 2051, the second phase input terminal 2052, and the third phase input terminal 2053 using a current sensor, only the current values ​​at any two ends of these terminals can be sampled. The current value at the third terminal can then be obtained from the current values ​​at any two ends, thus saving one current sensor and reducing circuit cost. Specifically, based on the principle that the vector sum of the current values ​​of the first phase input terminal 2051, the second phase input terminal 2052, and the third phase input terminal 2053 is zero, the current value at the remaining terminal can be obtained by inverting the sum of the current values ​​at any two ends of these terminals.

[0071] It is understood that, in addition to using voltage sensors or current sensors, the detection module described above can also use voltage sampling circuits, current sampling circuits, etc. The embodiments of the present invention do not make any limitations, as long as it can obtain the voltage value of the AC input terminal, the current value of the AC input terminal, and the voltage value of the DC output terminal 203.

[0072] The air conditioner control circuit of this embodiment uses a rectifier module 201 to rectify the AC power input from the AC input terminal, stores the energy in the energy storage module 202, and then supplies power to the compressor module 204. The rectifier module 201, by setting a three-phase rectifier bridge and a bidirectional switching assembly, can control the bidirectional switching assembly to ensure that the voltage and current input from the AC input terminal are in phase, thereby solving the harmonic problem. Furthermore, since the bidirectional switching assembly of the rectifier module 201 is connected between the first capacitor C1 and the second capacitor C2, it helps to reduce the losses of the bidirectional switching assembly and improve the efficiency of the circuit.

[0073] Reference Figure 7 This invention also provides an air conditioner control method, which is exemplarily applied to... Figures 2 to 5 Any one of the air conditioner control circuits, the air conditioner control method includes the following steps 701:

[0074] Step 701: Send a drive signal to the bidirectional switch assembly. The drive signal is used to control the synchronous drive of any one of the first bidirectional switch, the second bidirectional switch, or the third bidirectional switch.

[0075] In step 701 above, controlling the synchronous drive of any one of the first, second, or third bidirectional switches can mean controlling the synchronous drive of the first and second switching transistors in the first bidirectional switch, the synchronous drive of the third and fourth switching transistors in the second bidirectional switch, or the synchronous drive of the fifth and sixth switching transistors in the third bidirectional switch. It is understood that the drive signals can be sent to the first, second, and third bidirectional switches simultaneously. (Refer to...) Figure 8 The waveform of the drive signal is illustrated by taking the first and second switching transistors as examples.

[0076] By sending a drive signal to the bidirectional switch assembly, which controls the synchronous drive of any one of the first, second, or third bidirectional switches, the waveforms of the voltage and current input from the AC input terminal are made to be in phase, thereby solving the harmonic problem.

[0077] In addition, this embodiment of the invention also provides a circuit board, including the air conditioner control circuit of the above embodiments. Therefore, the circuit board of this embodiment utilizes a rectifier module 201 to rectify the AC power input from the AC input terminal, stores energy through the energy storage module 202, and then supplies power to the compressor module 204. The rectifier module 201, by setting a three-phase rectifier bridge and a bidirectional switching assembly, can ensure that the voltage input from the AC input terminal is in phase with the waveform of the input current by controlling the bidirectional switching assembly, thereby solving the harmonic problem. Furthermore, since the bidirectional switching assembly of the rectifier module 201 is connected between the first capacitor C1 and the second capacitor C2, it helps to reduce the loss of the bidirectional switching assembly and improve the efficiency of the circuit.

[0078] Furthermore, this embodiment of the invention also provides an air conditioner, including the air conditioner control circuit described in the above embodiments. Therefore, the air conditioner of this embodiment utilizes a rectifier module 201 to rectify the AC power input from the AC input terminal, stores the energy through an energy storage module 202, and then supplies power to the compressor module 204. The rectifier module 201, by setting a three-phase rectifier bridge and a bidirectional switching assembly, can ensure that the voltage input from the AC input terminal is in phase with the input current, thereby solving the harmonic problem. Moreover, since the bidirectional switching assembly of the rectifier module 201 is connected between the first capacitor C1 and the second capacitor C2, it helps to reduce the losses of the bidirectional switching assembly and improve the efficiency of the circuit.

[0079] It should also be understood that the various implementation methods provided in the embodiments of the present invention can be combined arbitrarily to achieve different technical effects.

[0080] Figure 9 An air conditioner 900 according to an embodiment of the present invention is shown. The air conditioner 900 includes: a memory 901, a processor 902, and a computer program stored in the memory 901 and executable on the processor 902. When the computer program is executed, it is used to perform the air conditioner control method described above.

[0081] The processor 902 and the memory 901 can be connected via a bus or other means.

[0082] The memory 901, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs, such as the air conditioner control method described in this embodiment of the invention. The processor 902 implements the aforementioned air conditioner control method by running the non-transitory software program and instructions stored in the memory 901.

[0083] The memory 901 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store the air conditioner control method described above. Furthermore, the memory 901 may include high-speed random access memory 901, and may also include non-transitory memory 901, such as at least one storage device memory 901, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 901 may optionally include memory 901 remotely located relative to the processor 902, and these remote memories 901 can be connected to the air conditioner 900 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0084] The non-transient software program and instructions required to implement the above-described air conditioner control method are stored in memory 901. When executed by one or more processors 902, the above-described air conditioner control method is executed, for example, executing... Figure 7 Method step 701.

[0085] This invention also provides a computer-readable storage medium storing computer-executable instructions for performing the above-described air conditioner control method.

[0086] It is understood that the computer-readable storage medium stores computer-executable instructions that are executed by one or more control processors, such as processor 902 in the air conditioner 900, causing processor 902 to perform the air conditioner control method, for example, to execute... Figure 7Method step 701.

[0087] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0088] Those skilled in the art will understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology 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 disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, storage device storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0089] The above provides a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. An air conditioner control circuit, characterized in that, include: A rectifier module, comprising a three-phase rectifier bridge and a bidirectional switch assembly, wherein the three-phase rectifier bridge comprises a first bridge arm, a second bridge arm, and a third bridge arm connected in parallel; the bidirectional switch assembly comprises a first bidirectional switch, a second bidirectional switch, and a third bidirectional switch, wherein one end of the first bidirectional switch is connected to the midpoint of the first bridge arm, one end of the second bidirectional switch is connected to the midpoint of the second bridge arm, and one end of the third bidirectional switch is connected to the midpoint of the third bridge arm; An energy storage module is connected in parallel with the three-phase rectifier bridge. The energy storage module includes a first capacitor and a second capacitor connected in series. The other ends of the first bidirectional switch, the second bidirectional switch, and the third bidirectional switch are all connected between the first capacitor and the second capacitor. An AC input terminal is connected to the rectifier module; A DC output terminal is connected to the energy storage module. The compressor module is connected to the DC output terminal; The detection module is used to detect the voltage value of the AC input terminal, the current value of the AC input terminal, and the voltage value of the DC output terminal. The voltage value of the AC input terminal, the current value of the AC input terminal, and the voltage value of the DC output terminal are used to control the bidirectional switch assembly so that the waveform phase of the voltage input from the AC input terminal and the input current are consistent.

2. The air conditioner control circuit according to claim 1, characterized in that, The air conditioner control circuit also includes: An inductor is used, and the AC input terminal is connected to the rectifier module through the inductor.

3. The air conditioner control circuit according to claim 1, characterized in that, The air conditioner control circuit also includes: An auxiliary power module includes an auxiliary power input terminal, a two-phase rectifier bridge, and a power supply component. The auxiliary power input terminal is connected to the AC input terminal and the two-phase rectifier bridge, respectively. The two-phase rectifier bridge is connected in parallel with the power supply component.

4. The air conditioner control circuit according to claim 3, characterized in that: The AC input terminal includes a first phase input terminal, a second phase input terminal and a third phase input terminal; the auxiliary power input terminal includes a fourth phase input terminal and a fifth phase input terminal; and the two-phase rectifier bridge includes a fourth bridge arm and a fifth bridge arm. The fourth phase input terminal is connected to any one of the first phase input terminal, the second phase input terminal, and the third phase input terminal, and the fourth phase input terminal is also connected to the midpoint of the fourth bridge arm; the fifth phase input terminal is also connected to the midpoint of the fifth bridge arm. Alternatively, the fourth phase input terminal and the fifth phase input terminal are respectively connected to any two of the first phase input terminal, the second phase input terminal, and the third phase input terminal, and the fourth phase input terminal is also connected to the midpoint of the fourth bridge arm, and the fifth phase input terminal is also connected to the midpoint of the fifth bridge arm.

5. The air conditioner control circuit according to claim 3, characterized in that, The air conditioner control circuit also includes: The first fan module includes a DC fan and a first drive assembly for driving the DC fan, wherein the first drive assembly is connected in parallel with the two-phase rectifier bridge.

6. The air conditioner control circuit according to any one of claims 1 to 4, characterized in that, The air conditioner control circuit also includes: The second fan module includes an AC fan and a second drive component for driving the AC fan. The second drive component is connected to the AC input terminal and the AC fan, respectively.

7. The air conditioner control circuit according to claim 6, characterized in that: The AC input terminal includes a first phase input terminal, a second phase input terminal, and a third phase input terminal; The second driving component is connected to any one of the first phase input terminal, the second phase input terminal, and the third phase input terminal; or, the second driving component is connected to any two of the first phase input terminal, the second phase input terminal, and the third phase input terminal.

8. An air conditioner control method, characterized in that, The air conditioner control method, applied to the air conditioner control circuit according to any one of claims 1 to 7, comprises: A drive signal is sent to the bidirectional switch assembly, the drive signal being used to control the synchronous drive of any one of the first bidirectional switch, the second bidirectional switch, or the third bidirectional switch.

9. A circuit board, characterized in that: Includes the air conditioner control circuit according to any one of claims 1 to 7.

10. An air conditioner, characterized in that: It includes the air conditioner control circuit according to any one of claims 1 to 7; or, it includes at least one processor and a memory for communicatively connecting to the at least one processor. The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the air conditioner control method as described in claim 8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the air conditioner control method as described in claim 8.

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