Voltage self-adaptive circuit and method, air conditioner, electronic equipment and medium

Abstract

The invention discloses a voltage self-adaption circuit and method, an air conditioner, electronic equipment and a medium, the voltage self-adaption circuit comprises a voltage sampling unit, a circuit switching unit and a control unit, the circuit switching unit comprises a switching circuit, a first rectifying circuit and a second rectifying circuit, the first rectifying circuit comprises a first polar capacitor, and the second rectifying circuit comprises a second polar capacitor; the first rectifying circuit comprises a first polar capacitor and a first polar capacitor, the second rectifying circuit comprises a second polar capacitor and a third polar capacitor, the negative electrode end of the second polar capacitor is connected with the positive electrode end of the third polar capacitor, and the positive electrode end of the first polar capacitor and the positive electrode end of the second polar capacitor are connected with the voltage output end. According to the method and the device provided by the invention, the polar capacitors of different numbers are charged and switched to the corresponding rectifying circuits, so that the voltage output end can provide proper working voltage for electric elements in the air conditioner by charging the polar capacitors of different numbers, and the air conditioner can normally operate in different input voltage ranges.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a voltage adaptive circuit, method, air conditioner, electronic equipment and medium. Background Art

[0002] The input voltage of an air conditioner depends on its power requirements and the circuit standard used. In different regions, the circuit standards and voltage levels may vary. Currently, the input voltage ranges of mainstream air conditioners are the following two: high input voltage (208 to 240V) and low input voltage (110V to 115V).

[0003] The traditional air conditioner design scheme is to develop two models with different input voltages according to different sales areas, that is, to produce high-working voltage air conditioners corresponding to high input voltages and low-working voltage air conditioners corresponding to low input voltages respectively. Different air conditioners have different working voltages, which means that two different circuit boards need to be designed separately. This design leads to the following problems: First, R&D personnel need to develop and produce input voltage products corresponding to the two types of air conditioners, which increases the development cost and production cost of the air conditioner; secondly, customers and suppliers need to distinguish between two different types of air conditioner models and maintain separate inventories during warehousing and sales, which results in higher inventory costs, and the air conditioner models have poor compatibility, which is not conducive to inventory digestion and increases operating costs; in addition, this design causes customers to pay attention to purchasing air conditioner models suitable for the current regional voltage when using air conditioner products, otherwise the air conditioner circuit board may be damaged due to improper use. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a voltage adaptive circuit, method, air conditioner, electronic device and medium. The voltage adaptive circuit can determine the voltage type of the AC power supply according to the sampling signal of the AC power supply, and switch to the corresponding rectifier circuit, so that the voltage output end can provide a suitable working voltage for the electrical components in the air conditioner by charging different numbers of polar capacitors, so that the air conditioner can operate normally under different input voltage ranges.

[0005] In a first aspect, an embodiment of the present invention provides a voltage adaptive circuit, including:

[0006] A voltage sampling unit, the input end of which is connected to an AC power supply, and the output end of which is used to output a sampling signal;

[0007] A circuit switching unit, comprising a switch circuit, a first rectifier circuit and a second rectifier circuit, wherein one end of the switch circuit is connected to the AC power supply, and the other end is respectively connected to the first rectifier circuit and the second rectifier circuit, the first rectifier circuit comprises a first polarity capacitor, the second rectifier circuit comprises a second polarity capacitor and a third polarity capacitor, the negative terminal of the second polarity capacitor is connected to the positive terminal of the third polarity capacitor, the positive terminals of the first polarity capacitor and the second polarity capacitor are connected to the voltage output terminal, and the negative terminals of the first polarity capacitor and the third polarity capacitor are grounded;

[0008] A control unit, wherein the input end is connected to the output end of the voltage sampling unit, and the output end is connected to the switch circuit, and is used for controlling the switch circuit to conduct the AC power supply and the first rectifier circuit when the sampling signal is a first voltage signal, so as to charge the first polarity capacitor, so that the voltage output end outputs the voltage between the two ends of the first polarity capacitor; and controlling the switch circuit to conduct the AC power supply and the second rectifier circuit when the sampling signal is a second voltage signal, so as to charge the second polarity capacitor and the third polarity capacitor, so that the voltage output end outputs the voltage between the positive end of the second polarity capacitor and the negative end of the third polarity capacitor.

[0009] In some embodiments, the voltage sampling unit includes an operational amplifier, an inverting terminal of the operational amplifier is connected to the neutral terminal of the AC power supply, a non-inverting terminal of the operational amplifier is connected to the live terminal of the AC power supply, and an output terminal of the operational amplifier is connected to the control unit;

[0010] The control unit is used to determine the sampling signal as a first voltage signal when the adopted signal is greater than a first voltage threshold; and to determine the sampling signal as a second voltage signal when the adopted signal is less than a second voltage threshold.

[0011] In some embodiments, the first rectifier circuit further includes a first rectifier unit, wherein an input end of the first rectifier unit is connected to the switch circuit, a positive output end is connected to a positive terminal of the first polarity capacitor, and a reverse output end is connected to a negative terminal of the first polarity capacitor;

[0012] The second rectifier circuit also includes a second rectifier unit, the input end of the second rectifier unit is connected to the switch circuit, the forward output end is connected to the positive end of the second polarity capacitor, and the reverse output end is connected to the negative end of the third polarity capacitor.

[0013] In some embodiments, the switching circuit includes a first relay switch and a second relay switch, and the control ends of the first relay switch and the second relay switch are connected to the control unit; when the sampling signal is a first voltage signal, the control unit is used to control the first relay switch to conduct the neutral line end of the AC power supply and the first input end of the first rectifier unit, and control the second relay switch to conduct the live line end of the AC power supply and the second input end of the first rectifier unit, so that the first rectifier unit rectifies the input AC power to output DC current to charge the first polarity capacitor.

[0014] In some embodiments, when the sampling signal is a second voltage signal, the control unit is used to control the first relay switch to conduct the neutral terminal of the AC power supply and the negative terminal of the second polarity capacitor, and control the second relay switch to conduct the live terminal of the AC power supply and the two input terminals of the second rectifier unit;

[0015] When the level of the neutral line terminal is lower than the level of the live line terminal, the second polarity capacitor is charged by a direct current flowing from the positive output terminal of the second rectifier unit to the neutral line terminal;

[0016] When the level of the neutral line terminal is higher than the level of the live line terminal, the third polarity capacitor is charged by a direct current flowing from the neutral line terminal to the reverse output terminal of the second rectifying unit.

[0017] In some embodiments, a positive temperature coefficient thermistor is connected between the neutral terminal and the live terminal, a third relay switch is connected in parallel to the positive temperature coefficient thermistor, and a control end of the third relay switch is connected to the control unit.

[0018] In some embodiments, the control unit is used to control the third relay switch to close after charging the first polarity capacitor for a preset time, or after charging the second polarity capacitor and the third polarity capacitor for a preset time, so as to short-circuit the positive temperature coefficient thermistor.

[0019] In some embodiments, the second rectifier circuit also includes a fourth polarity capacitor and a fifth polarity capacitor, the positive terminal of the fourth polarity capacitor is connected to the positive terminal of the second polarity capacitor, the negative terminal of the fourth polarity capacitor is connected to the negative terminal of the second polarity capacitor, the positive terminal of the fifth polarity capacitor is connected to the positive terminal of the third polarity capacitor, and the negative terminal of the fifth polarity capacitor is connected to the negative terminal of the third polarity capacitor.

[0020] In a second aspect, an embodiment of the present invention provides a voltage adaptive control method, the method is applied to a controller in a voltage adaptive circuit, the voltage adaptive circuit further comprising: a voltage sampling unit, an input end of which is connected to an AC power supply, and an output end of which is used to output a sampling signal to the controller; a circuit switching unit, comprising a switch circuit, a first rectifier circuit, and a second rectifier circuit, one end of the switch circuit is connected to the AC power supply, and the other end is respectively connected to the first rectifier circuit and the second rectifier circuit, the first rectifier circuit comprises a first polarity capacitor, the second rectifier circuit comprises a second polarity capacitor and a third polarity capacitor, the negative terminal of the second polarity capacitor is connected to the positive terminal of the third polarity capacitor, the positive terminals of the first polarity capacitor and the second polarity capacitor are connected to the voltage output terminal, and the negative terminals of the first polarity capacitor and the third polarity capacitor are grounded;

[0021] The method comprises:

[0022] When the sampling signal is a first voltage signal, controlling the switch circuit to conduct the AC power supply and the first rectifier circuit to charge the first polarity capacitor, so that the voltage output end outputs the voltage between the two ends of the first polarity capacitor;

[0023] When the sampling signal is a second voltage signal, the switch circuit is controlled to turn on the AC power supply and the second rectifier circuit to charge the second polarity capacitor and the third polarity capacitor, so that the voltage output end outputs the voltage between the positive terminal of the second polarity capacitor and the negative terminal of the third polarity capacitor.

[0024] In a third aspect, an embodiment of the present invention provides an air conditioner, comprising the voltage adaptive circuit described in any embodiment of the first aspect of the present invention.

[0025] In a fourth aspect, an embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the voltage adaptive control method as described in the embodiment of the second aspect of the present invention is implemented.

[0026] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the voltage adaptive control method as described in the embodiment of the second aspect of the present invention is implemented.

[0027] The voltage adaptive circuit, method, air conditioner, electronic device and medium proposed in the embodiments of the present invention have at least the following beneficial effects: the present invention samples the AC power supply through a voltage sampling unit to obtain a sampling signal, and sends the sampling signal to a control unit, the control unit analyzes and processes the sampling signal, determines the sampling signal as one of a first voltage signal representing a high voltage and a second voltage signal representing a low voltage, and when the sampling signal is the first voltage signal, controls the switch circuit to conduct the AC power supply and the first rectifier circuit to charge the first polarity capacitor, so that the voltage output terminal provides the voltage between the two ends of the first polarity capacitor to the electrical components in the air conditioner, and the voltage is the electrical components in the air conditioner. The working voltage of the component is used to make the air conditioner operate normally, and when the sampling signal is a second voltage signal, the switch circuit is controlled to turn on the AC power supply and the second rectifier circuit, so as to charge the second polarity capacitor and the third polarity capacitor, and the voltage output end outputs the voltage between the positive terminal of the second polarity capacitor and the negative terminal of the third polarity capacitor, thereby realizing voltage doubling of the input voltage, so as to raise the output voltage of the voltage output end to the working voltage of the electrical components in the air conditioner, so as to make the air conditioner operate normally; in summary, the circuit of the present invention has a high and low voltage adaptive function, so that the air conditioner only needs one set of models to operate normally under different input voltage ranges, thereby reducing the corresponding economic cost and improving the user experience.

[0028] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0031] Figure 1 is a schematic diagram of a voltage adaptive circuit provided by an embodiment of the present invention;

[0032] Figure 2 is another module schematic diagram of the voltage adaptive circuit provided by an embodiment of the present invention;

[0033] Figure 3 is a specific schematic diagram of a first rectifier circuit provided in an embodiment of the present invention;

[0034] Figure 4 is a specific schematic diagram of a second rectifier circuit provided in an embodiment of the present invention;

[0035] Figure 5 is a specific schematic diagram of a switch circuit provided by an embodiment of the present invention;

[0036] Figure 6 is a specific circuit diagram of Example 1 provided in an embodiment of the present invention;

[0037] Figure 7 is a specific circuit diagram of a sampling module provided by an embodiment of the present invention;

[0038] Figure 8 is a flow chart of a voltage adaptive control method provided by an embodiment of the present invention;

[0039] Fig. 9 is a specific flow chart of Example 1 provided in an embodiment of the present invention;

[0040] Fig.10 is a schematic diagram of an electronic device provided by an embodiment of the present invention.

[0041] Figure numerals: 110, AC power supply; 120, sampling unit; 130, control unit; 140, circuit switching unit; 141, switching circuit; 142, first rectifier circuit; 143, second rectifier circuit; 150, voltage output terminal; 210, second relay switch; 220, first relay switch; 230, third relay switch; 240, second rectifier unit; 250, first rectifier unit; C1, first polarity capacitor; C2, second polarity capacitor; C3, third polarity capacitor; C4, fourth polarity capacitor; C5, fifth polarity capacitor. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein 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 accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0046] In current air conditioners, the input voltage of the air conditioner depends on its power requirements and the circuit standard used. In different regions, the circuit standard and voltage level may vary. At present, the input voltage range of mainstream air conditioners has the following two types, high input voltage (208 to 240V) and low input voltage (110V to 115V).

[0047] The traditional air conditioner design scheme is to develop two models with different input voltages according to different sales areas, that is, to produce high-working voltage air conditioners corresponding to high input voltages and low-working voltage air conditioners corresponding to low input voltages respectively. Different air conditioners have different working voltages, which means that two different circuit boards need to be designed separately. This design leads to the following problems: First, R&D personnel need to develop and produce input voltage products corresponding to the two types of air conditioners, which increases the development cost and production cost of the air conditioner; secondly, customers and suppliers need to distinguish between two different types of air conditioner models and maintain separate inventories during warehousing and sales, which results in higher inventory costs, and the air conditioner models have poor compatibility, which is not conducive to inventory digestion and increases operating costs; in addition, this design causes customers to pay attention to purchasing air conditioner models suitable for the current regional voltage when using air conditioner products, otherwise the air conditioner circuit board may be damaged due to improper use.

[0048] Based on the above situation, the embodiment of the present invention provides a voltage adaptive circuit, method, air conditioner, electronic device and medium, which have at least the following beneficial effects. The present invention samples the AC power supply through a voltage sampling unit to obtain a sampling signal, and sends the sampling signal to a control unit. The control unit analyzes and processes the sampling signal, determines the sampling signal as one of a first voltage signal representing a high voltage and a second voltage signal representing a low voltage, and when the sampling signal is the first voltage signal, controls the switch circuit to conduct the AC power supply and the first rectifier circuit to charge the first polarity capacitor, so that the voltage output terminal provides the voltage between the two ends of the first polarity capacitor for the electrical components in the air conditioner, and the voltage is the air conditioner. The working voltage of the electrical components in the air conditioner is used to make the air conditioner operate normally. When the sampling signal is a second voltage signal, the switch circuit is controlled to turn on the AC power supply and the second rectifier circuit, so as to charge the second polarity capacitor and the third polarity capacitor, and the voltage output end outputs the voltage between the positive terminal of the second polarity capacitor and the negative terminal of the third polarity capacitor, thereby doubling the input voltage, so as to raise the output voltage of the voltage output end to the working voltage of the electrical components in the air conditioner, so as to make the air conditioner operate normally. In summary, the circuit of the present invention has a high and low voltage adaptive function, so that the air conditioner only needs one set of models to operate normally under different input voltage ranges, thereby reducing the corresponding economic cost and improving the user experience.

[0049] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0050] Reference Figure 1 , Figure 1 is a schematic diagram of a voltage adaptive circuit provided by an embodiment of the present invention. A first aspect of the present invention provides a voltage adaptive circuit, including:

[0051] A voltage sampling unit 120, whose input end is connected to the AC power supply 110, and whose output end is used to output a sampling signal;

[0052] The circuit switching unit 140 includes a switch circuit 141, a first rectifier circuit 142, and a second rectifier circuit 143. One end of the switch circuit 141 is connected to the AC power supply 110, and the other end is connected to the first rectifier circuit 142 and the second rectifier circuit 143 respectively. The first rectifier circuit 142 includes a first polarity capacitor C1, and the second rectifier circuit 143 includes a second polarity capacitor C2 and a third polarity capacitor C3. The negative terminal of the second polarity capacitor C2 is connected to the positive terminal of the third polarity capacitor C3, and the positive terminals of the first polarity capacitor C1 and the second polarity capacitor C2 are connected to the voltage output terminal 150. The negative terminals of the first polarity capacitor C1 and the third polarity capacitor C3 are grounded.

[0053] The control unit 130 has an input end connected to the output end of the voltage sampling unit 120, and an output end connected to the switch circuit 141, and is used to control the switch circuit 141 to turn on the AC power supply 110 and the first rectifier circuit 142 when the sampling signal is a first voltage signal, so as to charge the first polarity capacitor C1, so that the voltage output end 150 outputs the voltage between the two ends of the first polarity capacitor C1; when the sampling signal is a second voltage signal, control the switch circuit 141 to turn on the AC power supply 110 and the second rectifier circuit 143 to charge the second polarity capacitor C2 and the third polarity capacitor C3, so that the voltage output end 150 outputs the voltage between the positive end of the second polarity capacitor C2 and the negative end of the third polarity capacitor C3.

[0054] In some embodiments, the voltage sampling unit 120 includes an operational amplifier, the inverting terminal of the operational amplifier is connected to the neutral terminal of the AC power supply 110, the non-inverting terminal of the operational amplifier is connected to the live terminal of the AC power supply 110, and the output terminal of the operational amplifier is connected to the control unit 130; the control unit 130 is used to determine the sampling signal as a first voltage signal when the adopted signal is greater than the first voltage threshold; and determine the sampling signal as a second voltage signal when the adopted signal is less than the second voltage threshold.

[0055] In some embodiments, the default operating voltage of the air conditioner in the present invention is a high input voltage (208 to 240V), that is, the air conditioner in the present invention can operate normally even when directly connected to a high input voltage without raising the voltage through a voltage adaptive circuit. Therefore, when the first relay switch 220 and the second relay switch 210 in the present invention are turned on to the default closed end point, the voltage adaptive circuit rectifies the AC power supply 110 through the first rectifier circuit 142, so that the voltage output terminal 150 outputs a high voltage for the normal operation of the air conditioner; and when the air conditioner is connected to a low input voltage (110V to 115V), If the low input voltage is not raised, the air conditioner will not be able to operate normally. Therefore, the present invention charges the first polarity capacitor C1 and the second polarity capacitor C2 respectively in the positive and negative half cycles of the alternating current, so that the voltage across the first polarity capacitor C1 and the second polarity capacitor C2 connected in series is the raised output voltage. The raised output voltage can reach the high input voltage, and the voltage output terminal 150 provides the voltage to the electrical components in the air conditioner, so that the air conditioner that is only suitable for high input voltage can operate normally under low input voltage, and further the air conditioner can operate normally under different input voltage ranges.

[0056] In some implementations, the voltage sampling unit 120 includes an operational amplifier, an inverting terminal of the operational amplifier is connected to the neutral terminal of the AC power supply 110, a non-inverting terminal of the operational amplifier is connected to the live terminal of the AC power supply 110, and an output terminal of the operational amplifier is connected to the control unit 130; the control unit 130 is used to determine the sampling signal as a first voltage signal when the adopted signal is greater than the first voltage threshold; when the adopted signal is less than the second voltage threshold, the sampling signal is determined as a second voltage signal, wherein the first voltage signal is a high voltage signal corresponding to a high input voltage, the second voltage signal is a low voltage signal corresponding to a low input voltage, the first rectifier circuit 142 is a high voltage circuit corresponding to a high input voltage, and the second rectifier circuit 143 is a low voltage circuit corresponding to a low input voltage.

[0057] In some embodiments, when the sampling signal is greater than the first voltage threshold, the sampling signal is determined as a first voltage signal; when the sampling signal is less than the second voltage threshold, the sampling signal is determined as a second voltage signal, including obtaining multiple continuous peak signals based on the sampling signal, and when the multiple continuous peak signals are all greater than the first voltage threshold, determining the sampling signal as a high voltage signal; when the multiple continuous peak signals are all less than the second voltage threshold, determining the sampling signal as a low voltage signal.

[0058] refer to Figure 2 , Figure 2 It is another module schematic diagram of the voltage adaptive circuit provided by an embodiment of the present invention. In some embodiments, the first rectifier circuit 142 also includes a first rectifier unit 250, the input end of the first rectifier unit 250 is connected to the switch circuit 141, the positive output end is connected to the positive end of the first polarity capacitor C1, and the reverse output end is connected to the negative end of the first polarity capacitor C1; the second rectifier circuit 143 also includes a second rectifier unit 240, the input end of the second rectifier unit 240 is connected to the switch circuit 141, the positive output end is connected to the positive end of the second polarity capacitor C2, and the reverse output end is connected to the negative end of the third polarity capacitor C3.

[0059] Among them, the first rectifier unit 250 and the second rectifier unit 240 include a bridge rectifier. The bridge rectifier is a commonly used circuit composed of four diodes, which is used to convert the input AC signal into a relatively stable DC output signal. In the bridge rectifier circuit, two diodes are connected in the forward direction and two diodes are connected in the reverse direction, so that both half cycles of the AC signal are processed into DC signals and can be loaded by the circuit; in the rectifier unit, the function of the diode is to convert the negative half cycle and the positive half cycle of the input voltage into DC voltage respectively. In the positive half cycle of the input voltage, the forward voltage of the first and second diodes will break down, and then turn on, and guide the current to the cathode, while the reverse voltage of the third and fourth diodes will be cut off, and no current will flow through them; and in the negative half cycle of the input voltage, the forward voltages of the third and fourth diodes will break down, and then turn on, and direct the current to the positive electrode, while the reverse voltages of the first and second diodes will be cut off, and no current will flow through them; the output voltage of the rectifier unit is equal to the positive half cycle voltage or the negative half cycle voltage of the input voltage, so in the present invention, the second polarity capacitor C2 is charged by the positive half cycle voltage output by the first rectifier unit 250, and the third polarity capacitor C3 is charged by the negative half cycle voltage, and then in the case of low input voltage, the voltage of the second polarity capacitor C2 and the third polarity capacitor C3 connected in series can be regarded as a high input voltage and output by the voltage output terminal 150, so as to serve as the working voltage of the electrical components in the air conditioner, so that it can operate normally.

[0060] refer to Figure 3 , Figure 3 It is a specific schematic diagram of the first rectifier circuit 142 provided in an embodiment of the present invention. In some embodiments, the switch circuit 141 includes a first relay switch 220 and a second relay switch 210, and the control ends of the first relay switch 220 and the second relay switch 210 are connected to the control unit 130; when the sampling signal is a first voltage signal, the control unit 130 is used to control the first relay switch 220 to conduct the neutral line end of the AC power supply 110 and the first input end of the first rectifier unit 250, and control the second relay switch 210 to conduct the live line end of the AC power supply 110 and the second input end of the first rectifier unit 250, so that the first rectifier unit 250 rectifies the input AC power to output a DC current to charge the first polarity capacitor C1.

[0061] Among them, the base end 1 of the first relay switch 220 is connected to the neutral line end of the AC power supply 110, the open end 2 (action closing end) is connected to the negative end of the second polarity capacitor C2, and the closed end 3 (default closed end) is connected to the first input end of the first rectifier unit 250; the base end 1 of the second relay switch 210 is connected to the live wire end of the AC power supply 110, the open end 2 (action closing end) is connected to the two input ends of the second rectifier unit 240, and the closed end 3 (default closed end) is connected to the second input end of the first rectifier unit 250.

[0062] When the sampling signal is a high voltage signal, the base end 1 of the first relay switch 220 is connected to the closed end 3, the base end 1 of the second relay switch 210 is connected to the closed end 3, the first rectifier unit 250 rectifies the input alternating current to output a direct current to charge the first polarity capacitor C1, the voltage difference between the two ends of the first polarity capacitor C1 is a high input voltage, and the voltage output terminal 150 outputs the voltage between the two ends of the first polarity capacitor C1, so that the air conditioner can operate normally under the high input voltage range.

[0063] refer to Figure 4 , Figure 4 It is a specific schematic diagram of the second rectifier circuit 143 provided in an embodiment of the present invention. In some embodiments, when the sampling signal is a second voltage signal, the control unit 130 is used to control the first relay switch 220 to turn on the neutral line terminal of the AC power supply 110 and the negative terminal of the second polarity capacitor C2, and control the second relay switch 210 to turn on the live line terminal of the AC power supply 110 and the two input terminals of the second rectifier unit 240; when the level of the neutral line terminal is lower than the level of the live line terminal, the second polarity capacitor C2 is charged by a direct current flowing from the positive output terminal of the second rectifier unit 240 to the neutral line terminal; when the level of the neutral line terminal is higher than the level of the live line terminal, the third polarity capacitor C3 is charged by a direct current flowing from the neutral line terminal to the reverse output terminal of the second rectifier unit 240.

[0064] When the sampling signal is a low voltage signal, the base end 1 of the first relay switch 220 is connected to the start end 2, and the base end 1 of the second relay switch 210 is connected to the start end 2. When the level of the neutral line end is lower than the level of the live line end, that is, in the positive half cycle of the AC power supply 110, the live line end is connected to the positive end of the second polarity capacitor C2 through the second rectifier unit 240, and the neutral line end is connected to the negative end of the second polarity capacitor C2 to charge the second polarity capacitor C2 so that the voltage of the second polarity capacitor C2 is equal to the connected low input voltage. When the level of the neutral line end is higher than the level of the live line end, that is, in the negative half cycle of the AC power supply 110, the neutral line end is connected to the third The positive terminal of the second polarity capacitor C3 and the live wire terminal are connected to the negative terminal of the third polarity capacitor C3 through the second rectifier unit 240 to charge the third polarity capacitor C3, so that the voltage of the third polarity capacitor C3 is equal to the connected low input voltage, and then when the second polarity capacitor C2 and the third polarity capacitor C3 are connected in parallel, the voltage between the positive terminal of the second polarity capacitor C2 and the negative terminal of the third polarity capacitor C3 is equivalent to the high input voltage, and the voltage output terminal 150 outputs the voltage between the positive terminal of the second polarity capacitor C2 and the negative terminal of the third polarity capacitor C3, so that the air conditioner whose circuit board is only adapted to high input voltage can still operate normally under the low input voltage range.

[0065] refer to Figure 1 In some embodiments, a positive temperature coefficient thermistor R1 and a voltage sensitive resistor ZR1 are connected between the neutral terminal N and the live terminal L, and a third relay switch 230 is connected in parallel to the positive temperature coefficient thermistor, and a control end of the third relay switch 230 is connected to the control unit 130. In some embodiments, the control unit 130 is used to control the third relay switch 230 to close after the first polarity capacitor C1 is charged for a preset time, or after the second polarity capacitor C2 and the third polarity capacitor C3 are charged for a preset time, so as to short-circuit the positive temperature coefficient thermistor (PTC), so that after the first polarity capacitor C1 is charged, or after the second polarity capacitor C2 and the third polarity capacitor C3 are charged, the circuit is closed and the air conditioner can operate normally.

[0066] In some embodiments, the second rectifier circuit 143 also includes a fourth polarity capacitor C4 and a fifth polarity capacitor C5, the positive terminal of the fourth polarity capacitor C4 is connected to the positive terminal of the second polarity capacitor C2, the negative terminal of the fourth polarity capacitor C4 is connected to the negative terminal of the second polarity capacitor C2, the positive terminal of the fifth polarity capacitor C5 is connected to the positive terminal of the third polarity capacitor C3, and the negative terminal of the fifth polarity capacitor C5 is connected to the negative terminal of the third polarity capacitor C3. It can be imagined that by connecting the fourth polarity capacitor C4 and the fifth polarity capacitor C5 in parallel with the second polarity capacitor C2 and the third polarity capacitor C3 connected in series, the capacitance of the capacitor can be effectively increased to ensure the stability of circuit operation.

[0067] refer to Figure 5 , Figure 5 is a specific schematic diagram of the switch circuit provided by an embodiment of the present invention. In some embodiments, the first relay switch is also connected to a 12.5V stable power supply and a transistor Q3. One end of the first relay switch is connected to the collector of the transistor Q3. The base of the transistor Q3 is connected to the control unit, and is used to respond to the electrical signal sent by the control unit so that the collector and emitter of the transistor Q3 are connected to the ground, so that the first relay switch is switched from the default closed state in which the base end 1 is connected to the closed end 3 to the action closed state in which the base end 1 is connected to the open end 2. At the same time, the base of the transistor Q3 is provided with a Figure 5 The voltage divider resistors R6 and R7 are shown.

[0068] In some embodiments, the second relay switch is further connected to a 12.5V stable power supply and a transistor Q2, one end of the second relay switch is connected to the collector of the transistor Q2, and the base of the transistor Q2 is connected to the control unit, so that in response to the electrical signal sent by the control unit, the collector and emitter of the transistor Q2 are connected to the ground, so that the second relay switch is switched from the default closed state in which the base end 1 is connected to the closed end 3 to the action closed state in which the base end 1 is connected to the open end 2. At the same time, the base of the transistor Q2 is provided with a Figure 5 The voltage divider resistors R4 and R5 are shown.

[0069] In some embodiments, the third relay switch is further connected to a 12.5V stable power supply and a transistor Q1, one end of the third relay switch is connected to the collector of the transistor Q1, and the base of the transistor Q1 is connected to the control unit, so that the collector and emitter of the transistor Q1 are connected to the ground in response to the electrical signal sent by the control unit, so that the third relay switch is switched from the closed state to the open state, and at the same time, the base of the transistor Q1 is provided with a Figure 5 The voltage divider resistors R2 and R3 are shown.

[0070] refer to Figure 6 , Figure 6 is a specific circuit diagram of Example 1 provided by an embodiment of the present invention. In some embodiments, the operating voltage adapted to the electrical components such as the circuit board in the air conditioner is set to a high input voltage by default. The specific control logic of the circuit of the present invention is as follows: When the air conditioning system is powered on, the first relay and the second relay are in the default closed state (corresponding to Figure 3State), MCU is powered on and starts voltage sampling, continuous sampling time TA, by voltage peak value V0 = VIN / operational amplifier ratio of the operational amplifier, calculate the voltage peak value V0, and continuously sample N peak values ​​V0; if the continuously sampled N peak values ​​V0 is greater than the first voltage threshold V1, it is judged as high voltage input, the first relay and the first relay do not act, after power-on TS, the third relay switch contacts are closed, the PTC resistor is short-circuited through the relay contacts, the system is closed, and the air conditioner operates normally under high input voltage environment; if the continuously sampled N peak values ​​V0 is less than the second voltage threshold V2, it is judged as low voltage input, the first relay and the first relay are switched to the action state (corresponding to Figure 4 state), the circuit switches to double voltage input, the output voltage increases, and after powering on TS, the third relay switch contacts close, the PTC is short-circuited through the relay contacts, and the system is closed, allowing the air conditioner to operate normally under low input voltage environment.

[0071] refer to Figure 7 , Figure 7 It is a specific circuit diagram of the sampling module provided by an embodiment of the present invention. In some embodiments, the voltage sampling unit includes an operational amplifier IC1, the inverting end of the operational amplifier IC1 is connected to the neutral line end of the AC power supply, the non-inverting end of the operational amplifier IC1 is connected to the live line end of the AC power supply, and the output end of the operational amplifier IC1 is connected to the control unit, wherein the operational amplifier is used to sample the AC power supply and output a sampling signal.

[0072] Specifically, the operational amplifier is connected to a +5V support voltage, one end of the support power supply is grounded through a capacitor C6, and the other end is connected to the negative end of the first diode, the positive end of the first diode is respectively connected to the negative end of the second diode, the in-phase end of the operational amplifier and one end of the resistor R8, and the other end of the resistor R8 is connected to the +2.5V power supply. Through the above settings, the input of the operational amplifier can be associated with the support voltage, thereby improving the sampling accuracy of the operational amplifier; the output end of the operational amplifier is connected to the inverting end of the operational amplifier through a resistor R13, and the inverting end of the operational amplifier is also connected through Figure 8 The two diodes shown in the figure are connected to the +5V power supply and the ground so that the operational amplifier has a negative feedback effect, thereby improving the sampling accuracy of the operational amplifier; at the same time, the capacitor C7 connected in parallel with the resistor R13 can play a filtering role; the resistors R9, R10, R11 and R12 connected to the in-phase and inverting terminals of the operational amplifier can be used to adjust the operational amplifier ratio of the operational amplifier to further improve the sampling accuracy.

[0073] refer to Figure 8 , Figure 8It is a flow chart of a voltage adaptive control method provided by an embodiment of the present invention. In a second aspect, an embodiment of the present invention provides a voltage adaptive control method, which is applied to a controller in a voltage adaptive circuit. The voltage adaptive circuit also includes: a voltage sampling unit, an input end of which is connected to an AC power supply, and an output end is used to output a sampling signal to the controller; a circuit switching unit, including a switch circuit, a first rectifier circuit and a second rectifier circuit, one end of the switch circuit is connected to the AC power supply, and the other end is respectively connected to the first rectifier circuit and the second rectifier circuit, the first rectifier circuit includes a first polarity capacitor, the second rectifier circuit includes a second polarity capacitor and a third polarity capacitor, the negative terminal of the second polarity capacitor is connected to the positive terminal of the third polarity capacitor, the positive terminals of the first polarity capacitor and the second polarity capacitor are connected to the voltage output terminal, and the negative terminals of the first polarity capacitor and the third polarity capacitor are grounded; the method at least includes the following steps:

[0074] Step S810, when the sampling signal is a first voltage signal, controlling the switch circuit to conduct the AC power supply and the first rectifier circuit to charge the first polarity capacitor, so that the voltage output terminal outputs the voltage between the two ends of the first polarity capacitor;

[0075] Step S820, when the sampling signal is a second voltage signal, control the switch circuit to turn on the AC power supply and the second rectifier circuit to charge the second polarity capacitor and the third polarity capacitor, so that the voltage output end outputs the voltage between the positive terminal of the second polarity capacitor and the negative terminal of the third polarity capacitor.

[0076] In some embodiments, a positive temperature coefficient thermistor is connected between the neutral terminal and the live terminal, and a third relay switch is connected in parallel to the positive temperature coefficient thermistor. The control end of the third relay switch is connected to the control unit. When the sampling signal is a first voltage signal, the switch circuit is controlled to turn on the AC power supply and the first rectifier circuit to charge the first polarity capacitor, so that the voltage output end outputs the voltage between the two ends of the first polarity capacitor. It also includes, after charging the first polarity capacitor for a preset time, controlling the third relay switch to close to short-circuit the positive temperature coefficient thermistor, so that the positive temperature coefficient thermistor PTC is short-circuited through the relay contacts by closing the third relay contacts, and the system is closed. When the air conditioner is under high input voltage, the electrical components in the air conditioner can operate normally with the voltage output from the voltage output end as the working voltage.

[0077] In some embodiments, a positive temperature coefficient thermistor is connected between the neutral terminal and the live terminal, and a third relay switch is connected in parallel to the positive temperature coefficient thermistor. The control end of the third relay switch is connected to the control unit. When the sampling signal is a first voltage signal, the switch circuit is controlled to turn on the AC power supply and the first rectifier circuit to charge the first polarity capacitor, so that the voltage output end outputs the voltage between the two ends of the first polarity capacitor. It also includes, after charging the second polarity capacitor and the third polarity capacitor for a preset time, controlling the third relay switch to close to short-circuit the positive temperature coefficient thermistor, so that the positive temperature coefficient thermistor PTC is short-circuited through the relay contacts by closing the third relay contacts, and the system is closed. When the air conditioner is under low input voltage, the electrical components in the air conditioner can operate normally with the voltage output from the voltage output end as the working voltage.

[0078] refer to Fig. 9 , Fig. 9 is a specific flow chart of Example 1 provided by an embodiment of the present invention. In some embodiments, the present invention assumes that the operating voltage adapted to the electrical components such as the circuit board in the air conditioner is a high input voltage by default. The specific voltage adaptation process is as follows: When the air conditioning system is powered on, the first relay and the second relay are in the default closed state (corresponding to Figure 3 State), MCU is powered on and starts voltage sampling, continuous sampling time TA, by voltage peak value V0 = VIN / operational amplifier ratio of the operational amplifier, calculate the voltage peak value V0, and continuously sample N peak values ​​V0; if the continuously sampled N peak values ​​V0 is greater than the first voltage threshold V1, it is judged as high voltage input, the first relay and the first relay do not act, after power-on TS, the third relay switch contacts are closed, the PTC resistor is short-circuited through the relay contacts, the system is closed, and the air conditioner operates normally under high input voltage environment; if the continuously sampled N peak values ​​V0 is less than the second voltage threshold V2, it is judged as low voltage input, the first relay and the first relay are switched to the action state (corresponding to Figure 4 state), the circuit switches to double voltage input, the output voltage increases, and after powering on TS, the third relay switch contacts close, the PTC is short-circuited through the relay contacts, and the system is closed, allowing the air conditioner to operate normally under low input voltage environment.

[0079] In a third aspect, an embodiment of the present invention provides an air conditioner, comprising the voltage adaptive circuit of any one of the embodiments of the first aspect of the present invention.

[0080] refer to Fig.10 , Fig.10is a schematic diagram of an electronic device provided by an embodiment of the present invention. In a fourth aspect, some embodiments of the present invention provide an electronic device, the electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the voltage adaptive control method of any of the above embodiments when executing the computer program, for example, executing the above described Figure 8 Method steps S810 to S820.

[0081] The electronic device 1000 of the embodiment of the present invention includes one or more processors 1010 and a memory 1020. Fig.10 In the figure, a processor 1010 and a memory 1020 are taken as an example.

[0082] The processor 1010 and the memory 1020 may be connected via a bus or other means. Fig.10 The example of connecting through bus is taken in the following.

[0083] The memory 1020, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 1020 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 1020 may optionally include a memory 1020 remotely disposed relative to the processor 1010, and these remote memories may be connected to the electronic device 1000 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0084] In some embodiments, when the processor executes the computer program, the voltage adaptive control method of any one of the above embodiments is performed at a preset interval.

[0085] Those skilled in the art will understand that Fig.10 The device structure shown in the figure does not constitute a limitation on the electronic device 1000, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0086] exist Fig.10 In the electronic device 1000 shown, the processor 1010 can be used to call the control program of the air conditioner stored in the memory 1020, so as to implement the voltage adaptive control method.

[0087] Based on the hardware structure of the electronic device 1000 described above, various embodiments of the air conditioner of the present invention are proposed.

[0088] Specifically, the voltage adaptive control scheme proposed in the present invention is that the air conditioner system can automatically identify and adapt to the customer's power supply voltage. The scheme is applicable to all air conditioners, including but not limited to duct units, wall-mounted units, ceiling units, cabinet units, fresh air multi-split units and other air conditioners. The air conditioner of the embodiment of the present invention includes but is not limited to an indoor unit, an outdoor unit and an electronic device, wherein the indoor unit is provided with an indoor heat exchange module and an indoor fan, the outdoor unit is provided with a compressor, a gas-liquid separator, a refrigerant pipeline switching module, an outdoor heat exchanger, a temperature sensor for detecting the outdoor heat exchanger, an outdoor fan and a throttle valve, and the electronic device may include the following Fig.10 A processor 1010 and a memory 1020 are shown.

[0089] The non-transient software program and instructions required to implement the voltage adaptive control method of the above embodiment are stored in the memory, and when executed by the processor, the voltage adaptive control method of the above embodiment is executed.

[0090] In addition, an air conditioner provided in an embodiment of the present invention includes the electronic device mentioned in the above embodiment.

[0091] It is worth noting that since the air conditioner of the embodiment of the present invention has the electronic device of the above-mentioned embodiment, and the electronic device of the above-mentioned embodiment can execute the voltage adaptive control method of the above-mentioned embodiment, therefore, the specific implementation manner and technical effect of the air conditioner of the embodiment of the present invention can refer to the specific implementation manner and technical effect of the voltage adaptive control method of any of the above-mentioned embodiments, so that the air conditioner can determine the voltage type of the AC power supply according to the sampling signal of the AC power supply, and switch to the corresponding rectifier circuit, so that the voltage output end can provide a suitable working voltage for the electrical components in the air conditioner by charging different numbers of polarity capacitors, so that the air conditioner can operate normally under different input voltage ranges.

[0092] The embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the above-mentioned voltage adaptive control method, which can enable the above-mentioned one or more processors to execute the voltage adaptive control method in the above-mentioned method embodiment, for example, to execute the above-mentioned Figure 8 Method steps S810 to S820.

[0093] In summary, according to the technical solution of the embodiment of the present invention, when the working voltage of the electrical components in the air conditioner is a high input voltage, the present invention can sample the AC power supply through the voltage sampling unit to obtain a sampling signal, and send the sampling signal to the control unit, the control unit analyzes and processes the sampling signal, determines the sampling signal as one of the first voltage signal representing the high input voltage and the second voltage signal representing the high input voltage, and when the sampling signal is the first voltage signal, controls the switch circuit to turn on the AC power supply and the first rectifier circuit to charge the first polarity capacitor, so that the voltage output end provides the electrical components in the air conditioner with a voltage between the two ends of the first polarity capacitor, and the voltage is the working voltage of the electrical components in the air conditioner, so that the air conditioner can operate normally, and when the sampling signal is the first voltage signal, ... When the signal is a second voltage signal, the control switch circuit turns on the AC power supply and the second rectifier circuit, so as to charge the second polarity capacitor and the third polarity capacitor, and the voltage output end outputs the voltage between the positive end of the second polarity capacitor and the negative end of the third polarity capacitor, so as to realize voltage doubling of the input voltage, so as to raise the output voltage of the voltage output end to the working voltage of the electrical components in the air conditioner, so as to make the air conditioner operate normally; in summary, the circuit of the present invention has a high and low voltage adaptive function, and by doubling the voltage output of the low input voltage, the air conditioner that can only work under high input voltage can also adapt to low input voltage at the same time, so that the air conditioner only needs one set of models to work normally under different input voltage ranges, thereby reducing the corresponding economic cost and improving the user experience.

[0094] It is worth noting that the specific implementation and technical effects of the computer-readable storage medium of the embodiment of the present invention can refer to the specific implementation and technical effects of the voltage adaptive control method of any of the above embodiments, and the device embodiments described above are only illustrative, in which the units described as separate components may or may not be physically separated, that is, they may be located in one place, or they may be distributed to multiple network nodes. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0095] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, 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 a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium 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 include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media generally include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0096] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

[0097] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed methods above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or implemented as hardware, or 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 a non-transitory medium and a communication medium or a temporary medium. As known to those skilled in the art, the term computer storage medium 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 include, but are 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 tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0098] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A voltage adaptive circuit, comprising: A voltage sampling unit, the input end of which is connected to an AC power supply, and the output end of which is used to output a sampling signal; A circuit switching unit, comprising a switch circuit, a first rectifier circuit and a second rectifier circuit, wherein one end of the switch circuit is connected to the AC power supply, and the other end is respectively connected to the first rectifier circuit and the second rectifier circuit, the first rectifier circuit comprises a first polarity capacitor, the second rectifier circuit comprises a second polarity capacitor and a third polarity capacitor, the negative terminal of the second polarity capacitor is connected to the positive terminal of the third polarity capacitor, the positive terminals of the first polarity capacitor and the second polarity capacitor are connected to the voltage output terminal, and the negative terminals of the first polarity capacitor and the third polarity capacitor are grounded; a control unit, wherein the input end is connected to the output end of the voltage sampling unit, and the output end is connected to the switch circuit, and is used for controlling the switch circuit to conduct the AC power supply and the first rectifier circuit when the sampling signal is a first voltage signal, so as to charge the first polarity capacitor, so that the voltage output end outputs the voltage between the two ends of the first polarity capacitor; When the sampling signal is a second voltage signal, the switch circuit is controlled to turn on the AC power supply and the second rectifier circuit to charge the second polarity capacitor and the third polarity capacitor, so that the voltage output end outputs the voltage between the positive terminal of the second polarity capacitor and the negative terminal of the third polarity capacitor.

2. The voltage adaptive circuit according to claim 1, characterized in that: The voltage sampling unit comprises an operational amplifier, an inverting terminal of the operational amplifier is connected to the neutral terminal of the AC power supply, a non-inverting terminal of the operational amplifier is connected to the live terminal of the AC power supply, and an output terminal of the operational amplifier is connected to the control unit; The control unit is used for determining the sampling signal as a first voltage signal when the adopted signal is greater than a first voltage threshold; When the sampled signal is less than a second voltage threshold, the sampled signal is determined as a second voltage signal.

3. The voltage adaptive circuit according to claim 1, characterized in that: The first rectifier circuit further includes a first rectifier unit, wherein an input end of the first rectifier unit is connected to the switch circuit, a positive output end is connected to a positive terminal of the first polarity capacitor, and a reverse output end is connected to a negative terminal of the first polarity capacitor; The second rectifier circuit also includes a second rectifier unit, the input end of the second rectifier unit is connected to the switch circuit, the forward output end is connected to the positive end of the second polarity capacitor, and the reverse output end is connected to the negative end of the third polarity capacitor.

4. The voltage adaptive circuit according to claim 3, characterized in that: The switching circuit includes a first relay switch and a second relay switch, and control ends of the first relay switch and the second relay switch are connected to the control unit; when the sampling signal is a first voltage signal, the control unit is used to control the first relay switch to conduct the neutral line end of the AC power supply and the first input end of the first rectifier unit, and control the second relay switch to conduct the live line end of the AC power supply and the second input end of the first rectifier unit, so that the first rectifier unit rectifies the input AC power to output a DC current to charge the first polarity capacitor.

5. The voltage adaptive circuit according to claim 4, characterized in that: When the sampling signal is a second voltage signal, the control unit is used to control the first relay switch to conduct the neutral terminal of the AC power supply and the negative terminal of the second polarity capacitor, and control the second relay switch to conduct the live terminal of the AC power supply and the two input terminals of the second rectifier unit; When the level of the neutral line terminal is lower than the level of the live line terminal, the second polarity capacitor is charged by a direct current flowing from the positive output terminal of the second rectifier unit to the neutral line terminal; When the level of the neutral line terminal is higher than the level of the live line terminal, the third polarity capacitor is charged by a direct current flowing from the neutral line terminal to the reverse output terminal of the second rectifying unit.

6. The voltage adaptive circuit according to claim 4, characterized in that: A positive temperature coefficient thermistor is connected between the neutral line terminal and the live line terminal, a third relay switch is connected in parallel to the positive temperature coefficient thermistor, and a control end of the third relay switch is connected to the control unit.

7. The voltage adaptive circuit according to claim 6, characterized in that: The control unit is used to control the third relay switch to close after the first polarity capacitor is charged for a preset time, or after the second polarity capacitor and the third polarity capacitor are charged for a preset time, so as to short-circuit the positive temperature coefficient thermistor.

8. The voltage adaptive circuit according to claim 1, characterized in that: The second rectifier circuit also includes a fourth polarity capacitor and a fifth polarity capacitor, the positive terminal of the fourth polarity capacitor is connected to the positive terminal of the second polarity capacitor, the negative terminal of the fourth polarity capacitor is connected to the negative terminal of the second polarity capacitor, the positive terminal of the fifth polarity capacitor is connected to the positive terminal of the third polarity capacitor, and the negative terminal of the fifth polarity capacitor is connected to the negative terminal of the third polarity capacitor.

9. A voltage adaptive control method, characterized in that: The method is applied to a controller in a voltage adaptive circuit, and the voltage adaptive circuit further includes: A voltage sampling unit, the input end of which is connected to an AC power supply, and the output end of which is used to output a sampling signal to the controller; A circuit switching unit, comprising a switch circuit, a first rectifier circuit and a second rectifier circuit, wherein one end of the switch circuit is connected to the AC power supply, and the other end is respectively connected to the first rectifier circuit and the second rectifier circuit, the first rectifier circuit comprises a first polarity capacitor, the second rectifier circuit comprises a second polarity capacitor and a third polarity capacitor, the negative terminal of the second polarity capacitor is connected to the positive terminal of the third polarity capacitor, the positive terminals of the first polarity capacitor and the second polarity capacitor are connected to the voltage output terminal, and the negative terminals of the first polarity capacitor and the third polarity capacitor are grounded; The method comprises: When the sampling signal is a first voltage signal, controlling the switch circuit to conduct the AC power supply and the first rectifier circuit to charge the first polarity capacitor, so that the voltage output end outputs the voltage between the two ends of the first polarity capacitor; When the sampling signal is a second voltage signal, the switch circuit is controlled to turn on the AC power supply and the second rectifier circuit to charge the second polarity capacitor and the third polarity capacitor, so that the voltage output end outputs the voltage between the positive terminal of the second polarity capacitor and the negative terminal of the third polarity capacitor.

10. An air conditioner, characterized in that: The invention comprises the voltage adaptive circuit as claimed in any one of claims 1 to 8.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the voltage adaptive control method as claimed in claim 9 is implemented.

12. A computer-readable storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, the voltage adaptive control method as claimed in claim 9 is implemented.

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