Household appliance, power supply circuit thereof, control method of power supply circuit, and storage medium

Abstract

The present invention discloses a household appliance and its power supply circuit and a control method and storage medium for the power supply circuit, wherein the power supply circuit of the household appliance includes a conversion unit and a switching unit, wherein the conversion unit first converts the input alternating current into direct current, and then the switching unit can switch the working mode of the conversion unit according to the voltage amplitude of the input alternating current, wherein the working mode of the conversion unit can include a rectification voltage doubling boost working mode and a rectification boost working mode, and the conversion unit can generate a corresponding voltage to supply power to the load after being switched by the switching unit. Thus, the power supply circuit of the household appliance can realize the boosting function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitive ability, and increase the applicability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of household electrical appliances, and in particular to a power supply circuit of a household electrical appliance, a household electrical appliance, a control method for the power supply circuit of a household electrical appliance, and a computer-readable storage medium. Background Art

[0002] The voltage systems of different countries are different. For example, China has a 220-volt voltage system, Latin American countries have a 115-volt voltage system, and Japan has two voltage systems, one is 100 volts and the other is 200 volts. The existing circuits can generally only meet the voltage requirements within a certain range. If the voltage exceeds the range, the circuit will fail or be damaged, resulting in the equipment being unable to meet user needs. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one purpose of the present invention is to provide a power supply circuit for household appliances, which can realize the voltage boost function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitive power, and increase the applicability of the product.

[0004] A second objective of the present invention is to provide a household appliance.

[0005] A third objective of the present invention is to provide a method for controlling a power supply circuit of a household appliance.

[0006] A fourth object of the present invention is to provide a computer-readable storage medium.

[0007] A fifth object of the present invention is to provide another household appliance.

[0008] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes a power supply circuit for household appliances, which power supply circuit includes a conversion unit, which is used to convert input alternating current into direct current to power a load; and a switching unit, which switches the working mode of the conversion unit according to the voltage amplitude of the input alternating current, wherein the working mode of the conversion unit includes a rectification and voltage doubling working mode and a rectification and voltage boosting working mode.

[0009] The power supply circuit of the household appliance in this embodiment includes a conversion unit and a switching unit, wherein the conversion unit first converts the input AC power into DC power, and then the switching unit can switch the working mode of the conversion unit according to the voltage amplitude of the input AC power, wherein the working mode of the conversion unit can include a rectification voltage doubling boost working mode and a rectification boost working mode, and the conversion unit can generate a corresponding voltage to supply power to the load after being switched by the switching unit. Therefore, the power supply circuit of the household appliance in this embodiment can realize the boosting function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitive ability, and increase the applicability of the product.

[0010] In some embodiments of the present invention, the conversion unit includes: a first inductor, one end of which is connected to the live wire of the input alternating current; a totem pole topology module, a first end of which is connected to the other end of the first inductor, and a second end of which is connected to the neutral wire of the input alternating current; a first diode, an anode of which is connected to the third end of the totem pole topology module; a second diode, a cathode of which is connected to the fourth end of the totem pole topology module; a first capacitor and a second capacitor, one end of which is connected to the cathode of the first diode through the switching unit, the other end of which is connected to one end of the second capacitor and has a first node, the other end of which is connected to the anode of the second diode through the switching unit, and the first node is connected to the second end of the totem pole topology module; a third capacitor, one end of which is connected to the cathode of the first diode through the switching unit, and the other end of which is connected to the anode of the second diode through the switching unit.

[0011] In some embodiments of the present invention, the totem pole topology module includes: a third diode, the anode of the third diode serving as the first end of the totem pole topology module; a fourth diode, the cathode of the fourth diode being connected to the anode of the third diode, the anode of the fourth diode serving as the fourth end of the totem pole topology module; a first switch tube, the first end of the first switch tube being connected to the cathode of the third diode and serving as the third end of the totem pole topology module; a second switch tube, the first end of the second switch tube being connected to the second end of the first switch tube and serving as the second end of the totem pole topology module, the second end of the second switch tube being connected to the anode of the fourth diode.

[0012] In some embodiments of the present invention, the switching unit includes a first controllable switch and a second controllable switch, the first end of the first controllable switch is connected to the cathode of the first diode, the second end of the first controllable switch is connected to one end of the first capacitor, the third end of the first controllable switch is connected to one end of the third capacitor, the first end of the second controllable switch is connected to the anode of the second diode, the second end of the second controllable switch is connected to the other end of the second capacitor, and the third end of the second controllable switch is connected to the other end of the third capacitor.

[0013] In some embodiments of the present invention, the switching unit also includes a voltage detection module and a control module, the voltage detection module is used to detect the voltage amplitude of the input alternating current, and the control module controls the first controllable switch and the second controllable switch according to the voltage amplitude of the input alternating current to switch the working mode of the conversion unit.

[0014] In some embodiments of the present invention, when the first end of the first controllable switch is connected to the third end, and the first end of the second controllable switch is connected to the third end, the conversion unit operates in a rectification and boost operating mode; when the first end of the first controllable switch is connected to the second end, and the first end of the second controllable switch is connected to the second end, the conversion unit operates in a rectification and voltage doubling and boost operating mode.

[0015] In some embodiments of the present invention, the power supply circuit of the household appliance further includes an EMC processing unit and a soft start unit, wherein the EMC processing unit and the soft start unit are connected between the input alternating current and the conversion unit, the EMC processing unit performs anti-interference processing on the input alternating current, and the soft start unit is used to realize soft start of the power supply circuit.

[0016] To achieve the above objective, a second aspect of the present invention provides a household appliance, which includes a power supply circuit of the household appliance as described in the above embodiment.

[0017] The household appliance in this embodiment can realize the voltage boosting function of different voltage systems through the power supply circuit of the household appliance in the above embodiment, expand the working voltage range of the power supply circuit, improve the product's competitiveness, and increase the applicability of the product.

[0018] To achieve the above-mentioned purpose, the third aspect of the present invention proposes a control method for the power supply circuit of household appliances, wherein the power supply circuit includes a conversion unit, and the conversion unit is used to convert the input alternating current into direct current to power the load, and the control method includes: detecting the voltage amplitude of the input alternating current; switching the working mode of the conversion unit according to the voltage amplitude of the input alternating current, wherein the working mode of the conversion unit includes a rectification and voltage doubling working mode and a rectification and voltage boosting working mode.

[0019] In the control method of the power supply circuit of the household appliance in the embodiment of the present invention, the power supply circuit includes a conversion unit, which is used to convert the input AC power into DC power to supply power to the load. The control method of the power supply circuit includes first detecting the voltage amplitude of the input AC power, and then switching the working mode of the conversion unit according to the voltage amplitude of the input AC power, wherein the working mode of the conversion unit may include a rectification voltage doubling boost working mode and a rectification boost working mode. Therefore, the control method of the power supply circuit of the household appliance can realize the boost function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitive ability, and increase the applicability of the product.

[0020] In some embodiments of the present invention, the conversion unit includes: a first inductor, a totem pole topology module, a first diode, a second diode, a first capacitor, a second capacitor and a third capacitor, one end of the first inductor is connected to the live wire of the input alternating current, the first end of the totem pole topology module is connected to the other end of the first inductor, the second end of the totem pole topology module is connected to the neutral wire of the input alternating current, the anode of the first diode is connected to the third end of the totem pole topology module, the cathode of the second diode is connected to the fourth end of the totem pole topology module, the cathode of the first diode is connected to the first end of the first controllable switch, one end of the first capacitor is connected to the second end of the first controllable switch, and the One end of the third capacitor is connected to the third end of the first controllable switch, the other end of the first capacitor is connected to one end of the second capacitor and has a first node, the first node is connected to the second end of the totem pole topology module, the anode of the second diode is connected to the first end of the second controllable switch, the second end of the second controllable switch is connected to the other end of the second capacitor, and the third end of the second controllable switch is connected to the other end of the third capacitor, wherein switching the working mode of the conversion unit according to the voltage amplitude of the input alternating current includes: controlling the state of the first controllable switch and the state of the second controllable switch according to the voltage amplitude of the input alternating current to switch the working mode of the conversion unit.

[0021] In some embodiments of the present invention, the state of the first controllable switch and the state of the second controllable switch are controlled according to the voltage amplitude of the input alternating current, including: when the voltage amplitude of the input alternating current is within a first preset voltage range, controlling the first end of the first controllable switch to be connected to the third end, and controlling the first end of the second controllable switch to be connected to the third end, so that the conversion unit operates in a rectification and boosting working mode; when the voltage amplitude of the input alternating current is within a second preset voltage range, controlling the first end of the first controllable switch to be connected to the second end, and controlling the first end of the second controllable switch to be connected to the second end, so that the conversion unit operates in a rectification and voltage doubling and boosting working mode, wherein the upper limit of the first preset voltage range is less than the lower limit of the second preset voltage range.

[0022] To achieve the above-mentioned purpose, an embodiment of the fourth aspect of the present invention proposes a computer-readable storage medium, on which a control program for the power supply circuit of a household appliance is stored. When the control program for the power supply circuit of the household appliance is executed by a processor, a control method for the power supply circuit of the household appliance as described in the above-mentioned embodiment is implemented.

[0023] The computer-readable storage medium of the embodiment of the present invention can realize the boost function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitiveness, and increase the applicability of the product through the processor executing the control program of the power supply circuit of the household appliance stored thereon.

[0024] To achieve the above-mentioned purpose, a fifth aspect of the present invention proposes a household appliance, which includes a memory, a processor, and a control program for a power supply circuit of the household appliance stored in the memory and executable on the processor. When the processor executes the control program for the power supply circuit of the household appliance, the control method for the power supply circuit of the household appliance as described in the above-mentioned embodiment is implemented.

[0025] The household appliance device in the embodiment of the present invention includes a memory and a processor. The processor executes a control program of the power supply circuit of the household appliance device stored in the memory, which can realize the boost function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitiveness, and increase the applicability of the product.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a structural block diagram of a power supply circuit for a household appliance according to an embodiment of the present invention;

[0028] Figure 2is a schematic diagram of a power supply circuit of a household appliance according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of a power supply circuit of a household appliance according to an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of a power supply circuit of a household appliance according to an embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of a power supply circuit of a household appliance according to an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of a power supply circuit of a household appliance according to an embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of a power supply circuit of a household appliance according to an embodiment of the present invention;

[0034] Figure 8 is a schematic diagram of a power supply circuit of a household appliance according to an embodiment of the present invention;

[0035] Fig. 9 is a schematic diagram of a power supply circuit of a household appliance according to an embodiment of the present invention;

[0036] Fig.10 is a structural block diagram of a household appliance according to an embodiment of the present invention;

[0037] Fig.11 is a flow chart of a method for controlling a power supply circuit in a household appliance according to an embodiment of the present invention;

[0038] Fig.12 is a structural block diagram of a household appliance according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] The following describes a household appliance, a power supply circuit thereof, a control method of the power supply circuit, and a storage medium according to an embodiment of the present invention with reference to the accompanying drawings.

[0041] Figure 1 4 is a structural block diagram of a power supply circuit for a household appliance according to an embodiment of the present invention.

[0042] like Figure 1As shown, the present invention proposes a power supply circuit 10 for household appliances, which includes a conversion unit 11 and a switching unit 12, wherein the conversion unit 11 can supply a load with a direct current obtained after converting the input alternating current, so that the load can work normally; the switching unit 12 can switch the working mode of the conversion unit 11 according to the voltage amplitude corresponding to the input alternating current, wherein the working mode of the conversion unit 11 can include a rectification and voltage doubling working mode and a rectification and voltage boosting working mode.

[0043] First, it should be noted that the input AC power in this embodiment can be the mains power of different cities and countries, for example, it can be 220V AC power in China, or 100V AC power or 200V AC power in Japan. Figure 1 The switching unit 12 is connected to the conversion unit 11, and the switching unit 12 and the conversion unit 11 are respectively connected to the input AC power. The switching unit 12 can determine whether the input AC power is high voltage AC power or low voltage AC power according to the voltage amplitude of the input AC power, and then perform corresponding control on the conversion unit 11. The conversion unit 11 can enter different boost working modes through switching control, which may include rectification voltage doubling boost, rectification boost, etc.

[0044] It can be understood that the household appliance in this embodiment has a rated working voltage, and the power supply circuit can supply power to the device. However, since the corresponding mains electricity in different countries or cities is different, the voltage amplitude of the AC power connected to the power supply circuit is not fixed. Therefore, in order to adapt to the requirements of different voltage systems, the voltage provided to the household appliance can be adjusted by switching the working mode through the conversion unit 11.

[0045] For example, the rated working voltage of a household appliance is about 220 volts, but when used in Japan or Latin American countries, since the mains electricity in Japan is 200 volts and the mains electricity in Latin American countries is 115 volts, if the mains electricity is used directly, it cannot meet the use requirements of the household appliance, which may easily cause accidents or reduce the user experience. Therefore, if the voltage connected to the household appliance is 200 volts, the conversion unit 11 can switch to the rectification and boosting working mode to boost the 200-volt AC power to obtain a voltage of 220 volts that meets the working voltage of the household appliance; and if the voltage connected to the household appliance is 115 volts, the conversion unit 11 can switch to the rectification and voltage doubling working mode to obtain a voltage of 230 volts close to the working voltage of the household appliance. Through the above method, it can be ensured that the household appliances can operate normally even when the AC voltage amplitude is low, thereby improving the compatibility of the power supply circuit of the household appliances. At the same time, it can improve the bidding ability of the household appliances installed with the power supply circuit and improve the user experience of overseas users, so that the corresponding household appliances can not only be suitable for domestic AC requirements, but also adapt to the requirements of different voltage systems overseas.

[0046] In some embodiments of the present invention, see Figure 1 and Figure 2 The transformation unit 11 includes a first inductor L1, a first diode D1, a second diode D2, a first capacitor C1, a second capacitor C2 and a third capacitor C3.

[0047] Among them, one end of the first inductor L1 can be connected to the live wire L in the input alternating current; the first end of the totem pole topology module 110 can be connected to the other end of the first inductor L1, and the second end of the totem pole topology module 111 can be connected to the neutral line N in the input alternating current; the anode of the first diode D1 can be connected to the third end of the totem pole topology module 110; the cathode of the second diode D2 can be connected to the fourth end of the totem pole topology module 110; one end of the first capacitor C1 can be connected to the cathode of the first diode D1 through the switching unit 12, the other end of the first capacitor C1 is connected to one end of the second capacitor C2 and has a first node P1, the other end of the second capacitor C2 can be connected to the anode of the second diode D2 through the switching unit 12, and the first node P1 is connected to the second end of the totem pole topology module 111; one end of the third capacitor C3 can be connected to the cathode of the first diode D1 through the switching unit 12, and the other end of the third capacitor C3 can be connected to the anode of the second diode D2 through the switching unit 12.

[0048] Specifically, see first Figure 2It can be seen that one end of the first inductor L1 is connected to the live wire L, and the other end is connected to the first end of the topology module 110. It should be noted that the AC power can charge the first inductor L1 so that electrical energy is stored in the first inductor L1. Then, during the working process after charging is completed, the electrical energy stored in the first inductor L1 can be provided to the first capacitor C1, the second capacitor C2 or the third capacitor C3, so the bus voltage can be increased, thereby increasing the supply voltage of the load.

[0049] The first diode D1 is connected to the first capacitor C1 through the switching unit 12, and the second diode D2 is connected to the second capacitor C2 through the switching unit 12. It should be noted that the switching unit 12 in this embodiment can be Figure 1 . For example, the switching unit 12 connecting the first diode D1 and the first capacitor C1 may be a switch, and the switching unit 12 connecting the second diode D2 and the second capacitor C2 may be another switch. In addition, since the first node P1 provided in the first capacitor C1 and the second capacitor C2 is connected to the second end in the topology module 110, and the second end in the topology structure 110 is connected to the neutral line N in the alternating current, the first node P1 is also connected to the neutral line N in the alternating current.

[0050] Therefore, in the positive half axis of the alternating current, one end of the first inductor L1 is connected to the live wire L of the alternating current, and then the other end of the first inductor L1 can be connected to the first node P1 through the first diode D1, the switching unit 12 and the first capacitor C1 after passing through the topological module 110, thereby returning to the neutral line N of the alternating current to form a loop, and then the electric energy stored in the first inductor L1 can be provided to the first capacitor C1 to increase the voltage of the first capacitor C1; in the negative half axis of the alternating current, one end of the first inductor L1 is connected to the live wire L of the alternating current, and then the other end of the first inductor L1 can be connected to the first node P1 through the second diode D2, the switching unit 12 and the second capacitor C2 after passing through the topological module 110, thereby returning to the neutral line N of the alternating current to form a loop, and then the electric energy stored in the first inductor L1 can be provided to the second capacitor C2 to increase the voltage of the second capacitor C2.

[0051] In the process of increasing the voltage of the third capacitor C3, in the positive half axis of the alternating current, one end of the first inductor L1 is connected to the live wire L of the alternating current, and then the other end of the first inductor L1 passes through the topological module 110, and can be connected to the topological module 110 through the first diode D1, the switching unit 12, the third capacitor C3, the switching unit 12 and the second diode D2, and then connected to the zero line N of the alternating current through the second end of the topological module 110, so as to return to the zero line N of the alternating current, forming a loop, and then the electric energy stored in the first inductor L1 can be provided to the third capacitor C3 to increase the voltage of the third capacitor C3. The voltage of the three capacitors C3; in the negative half axis of the alternating current, one end of the first inductor L1 is connected to the live wire L of the alternating current, and then the other end of the first inductor L1 passes through the topological module 110, and can be connected to the topological module 110 through the second diode D2, the switching unit 12, the third capacitor C3, the switching unit 12 and the first diode D1, and then connected to the zero line N of the alternating current through the second end of the topological module 110, so as to return to the zero line N of the alternating current, forming a loop, and then the electric energy stored in the first inductor L1 can be provided to the third capacitor C3 to increase the voltage of the third capacitor C3

[0052] In some embodiments of the present invention, Figure 2 As shown, the totem pole topology module 110 includes a third diode D3, a fourth diode D4, a first switch tube Q1 and a second switch tube Q2.

[0053] Among them, the anode of the third diode D3 can be used as the first end in the topological module 110; the cathode of the fourth diode D4 is connected to the anode of the third diode D3, and the anode of the fourth diode D4 can be used as the fourth end in the topological module 110; the first end of the first switch tube Q1 can be connected to the cathode of the third diode D3, and can also be used as the third end in the topological module 110; the first end of the second switch tube Q2 can be connected to the second end of the first switch tube D1, and can also be used as the second end in the topological module 110, and the second end of the second switch tube Q2 can also be connected to the anode of the fourth diode D4.

[0054] Specifically, in this embodiment, the first inductor L1 can be charged in advance before the first inductor L1 is used by controlling the switching of the first switch tube Q1 and the second switch tube Q2. Figure 2, when the AC voltage input by the input AC power is a positive half-axis voltage, the first switch tube Q1 can be controlled to be turned on and the second switch tube Q2 can be turned off. At this time, since one end of the first inductor L1 is connected to the live wire L in the input AC power, the current can first pass through one end of the first inductor L1, and then flow out from the other end of the first inductor L1 through the first end in the topology module 110 to be connected to the anode of the third diode D3 in the topology module 110, and then flow out from the cathode of the third diode D3. Since the state of the first switch tube Q1 is turned on at this time, the current can flow into the first end of the first switch tube Q1 after flowing out from the cathode of the third diode D3, and flow out from the second end of the first switch tube Q1 and then enter the second end of the topology module 110. Since the second end of the topology module 110 is connected to the neutral wire N in the AC power, the current flows out from the live wire L and enters the neutral wire N to form a loop. That is to say, when the input AC power works in the positive half-axis voltage, the input AC power is in the process of charging the first inductor L1, such as Figure 3 As shown, the current may flow in the direction of live wire→first inductor L1→third diode D3→first switch tube Q1→neutral wire. In this process, the first inductor L1 may be charged so that the first inductor L1 can store electrical energy.

[0055] In the case where the AC voltage input by the input AC power is a negative half-axis voltage, the second switch tube Q2 can be controlled to be turned on and the first switch tube Q1 can be turned off. For the convenience of analysis, it can be considered that the current of the input AC power is output from the neutral line N and flows into the second end of the topology module 110. Since the first switch tube Q1 is in a closed and disconnected state and the second switch tube Q2 is in a conducting state, the current can pass through the second switch tube Q2, that is, flow into the first end of the second switch tube Q2, and then flow out from the second end of the second switch tube Q2, and then flow to the first end of the topology module 110 through the fourth diode D4. Since one end of the first inductor L1 is connected to the first end of the topology module 110, the current can flow into the first inductor L1 and then flow out from one end of the first inductor L1. Since one end of the first inductor L1 is connected to the live line L of the input AC power, in the negative half axis, after the current flows out of the neutral line N in the input AC power, it can flow into the live line L to form a loop. That is to say, when the input AC power operates in the negative half-axis voltage, the input AC power is in the process of charging the first inductor L1, such as Figure 4 As shown, the current may flow in the direction of the neutral line→the second switch tube Q2→the fourth diode D4→the first inductor L1→the live line. In this process, the first inductor L1 may be charged so that the first inductor L1 can store electrical energy.

[0056] In some embodiments of the present invention, see Figure 1 and Figure 2It can be known that the switching unit 12 may include a first controllable switch RY1 and a second controllable switch RY2, wherein the first end of the controllable switch RY1 may be connected to the cathode of the first diode D1, the second end of the controllable switch RY1 may be connected to one end of the first capacitor C1, the third end of the controllable switch RY1 may be connected to one end of the third capacitor C3, the first end of the controllable switch RY2 may be connected to the anode of the second diode D2, the second end of the controllable switch RY2 may be connected to the other end of the second capacitor C2, and the third end of the controllable switch RY2 may be connected to the other end of the third capacitor C3.

[0057] In this embodiment, it should be noted that the switching unit 12 may include a controllable switch RY1 and a controllable switch RY2. Optionally, the controllable switch RY1 and the controllable switch RY2 may be single-pole double-throw switches, wherein the fixed end, i.e., the first end, of the controllable switch RY1 may be connected to the cathode of the first diode D1, and the two moving ends, i.e., the second end and the third end, of the controllable switch RY1 may be connected to the first capacitor C1 and the third capacitor C3, respectively. By controlling the moving end of the controllable switch RY1, the first capacitor C1 or the third capacitor C3 may be controlled to be connected to the circuit, so that the circuit may be controlled to switch in different working modes. The fixed end, i.e., the first end, of the controllable switch RY2 may be connected to the anode of the second diode D2, and the two moving ends, i.e., the second end and the third end, of the controllable switch RY2 may be connected to the second capacitor C2 and the third capacitor C3, respectively. By controlling the moving end of the controllable switch RY2, the second capacitor C2 or the third capacitor C3 may be controlled to be connected to the circuit, so that the circuit may be controlled to switch in different working modes. It can be understood that by controlling the controllable switch RY1 and the controllable switch RY2, it is possible to control whether the first capacitor C1 and the second capacitor C2 are connected to the circuit, or the third capacitor C3 is connected to the circuit. It should be noted that the circuit working mode when the first capacitor C1 and the second capacitor C2 are connected to the circuit is different from the circuit working mode when the third capacitor C3 is connected to the circuit. In the case where the first capacitor C1 and the second capacitor C2 are connected to the circuit, the circuit working mode can be a rectification and voltage doubling working mode; when the third capacitor C3 is connected to the circuit, the circuit working mode can be a rectification and voltage boosting working mode.

[0058] In this embodiment, that is, when the first end and the third end of the controllable switch RY1 are connected, and the first end and the third end of the controllable switch RY2 are connected, the working mode of the conversion unit 11 in the power supply circuit can be rectification and boost, that is, the conversion unit 11 can work in the rectification and boost working mode; when the first end and the second end of the controllable switch RY1 are connected, and the first end and the second end of the controllable switch RY2 are connected, the working mode of the conversion unit 11 in the power supply circuit can be the rectification and voltage doubling working mode, that is, the conversion unit 11 can work in the rectification and voltage doubling working mode.

[0059] When the conversion unit 11 in the power supply circuit is in the rectification and voltage doubling working mode, the specific voltage boosting method is as follows: in the positive half axis, when the first inductor L1 passes through Figure 3 After the charging method shown is completed, the first switch tube Q1 can be disconnected. After the first switch tube Q1 is disconnected, the current on the first inductor L1 can flow out from the other end of the first inductor L1, and then connect to the anode of the third diode D3 in the topology module 110 through the first end in the topology module 110, and then flow out from the cathode of the third diode D3. Since the state of the first switch tube Q1 is disconnected at this time, the current can flow into the anode of the first diode D1 after flowing out from the cathode of the third diode D3, and flow out from the cathode of the first diode D1, and then flow into one end of the first capacitor C1 through the controllable switch RY1, and then flow out from the second end of the first capacitor C2, and then reach the first node P1 to return to the zero line, forming a loop, so that the electric energy obtained by charging in the first inductor L1 can be used to boost the first capacitor C1. That is to say, after the first inductor L1 is fully charged and boosted to the first capacitor C1, that is, in the process of positive half-axis boosting, as shown in Figure 5 As shown, Figure 5 This is the discharge mode of the first inductor L1 in the rectification voltage doubling boost mode with the input voltage being the positive half axis according to an embodiment of the present invention, wherein the electric energy in the first inductor L1 is boosted for the first capacitor C1 through the following path: live wire → first inductor L1 → third diode D3 → first diode D1 → controllable switch RY1 → first capacitor C1 → neutral wire. Through the above path, the electric energy on the first inductor L1 can be transmitted to the first capacitor C1, thereby completing the boost of the first capacitor C1.

[0060] In the negative half axis, when the first inductor L1 passes through Figure 4 After the charging is completed, the second switch tube Q2 can be turned off. After the second switch tube Q2 is turned off, Figure 6As shown, the current on the first inductor L1 can flow from one end of the first inductor L1 to the live wire, then flow to the first node P1 through the neutral wire, flow through one end of the second capacitor C2, then flow out from the other end of the second capacitor C2, flow to the anode of the second diode D2 through the controllable switch RY2, and flow from the cathode of the second diode D2 to the anode of the fourth diode D4, and then flow from the cathode of the fourth diode D4 to the other end of the first inductor L1, forming a loop, so that the electric energy obtained by charging in the first inductor L1 can be used to boost the voltage of the second capacitor C2. That is to say, after the first inductor L1 is charged, it boosts the voltage of the second capacitor C2, that is, in the negative half-axis boost process, as shown Figure 6 As shown, Figure 6 This is the discharge mode of the first inductor L1 in the rectification voltage doubling boost mode with the input voltage of the negative half axis according to an embodiment of the present invention, wherein the electric energy in the first inductor L1 can be boosted for the second capacitor C2 from the following path: first inductor L1→live wire→neutral wire→second capacitor C2→controllable switch RY2→second diode D2→fourth diode D4→first inductor L1. Through the above path, the electric energy on the first inductor L1 can be transmitted to the second capacitor C2, thereby completing the boost of the second capacitor C2.

[0061] After completing the voltage boost of the first capacitor C1 and the second capacitor C2, the voltage obtained by the busbar formed by the first capacitor C1 and the second capacitor C2 can be increased, thereby providing a sufficiently high voltage for the home appliance to ensure that the home appliance can work normally and improve the user experience.

[0062] In the rectification and boost working mode, the first end and the third end of the controllable switch RY1 are connected, and the first end and the third end of the controllable switch RY2 are connected, and the third capacitor C3 is connected in the circuit. It should be noted that in the rectification and boost working mode, the charging process of the first inductor L1 is similar to the charging process corresponding to the rectification and voltage doubling working mode, and will not be repeated here.

[0063] In this rectification and boosting operation mode, how the first inductor L1 transmits electric energy to the third capacitor C3 is described in detail. Figure 7As shown, in the positive half axis, after the first inductor L1 is fully charged, the first switch tube Q1 is first controlled to be turned off, and the second switch tube Q2 is turned on. The electric energy on the first inductor L1 flows out from the other end of the first inductor L1, flows from the first end in the topology module 110 into the anode of the third diode D3 in the topology module 110, and flows out from the cathode of the third diode D3. Since the first switch tube Q1 is turned off, the current does not pass through the first switch tube Q1 at this time, but directly flows to the anode of the first diode D1, and then flows out from the cathode of the first diode D1. Since the first end and the third end of the controllable switch RY1 are connected, the current flowing out from the cathode of the first diode D1 can flow to the third capacitor C3 through the controllable switch RY1. Since the first end and the third end of the controllable switch RY2 are connected, the current flowing out from the third capacitor C3 can flow to the anode of the second diode D2 through the controllable switch RY2, and flow to the cathode through the second diode D2. Since the second switch tube Q2 is in the on state at this time, the current can flow from the cathode of the second diode D2 to the second switch tube Q2, and then flow from the second end in the topology module 110 to the neutral line to form a loop.

[0064] Thus, the electric energy obtained by charging the first inductor L1 can be used to boost the voltage of the third capacitor C3. That is, after the first inductor L1 is charged, it is boosted to the third capacitor C3, that is, in the positive half-axis boost process, Figure 7 As shown, Figure 7 This is the discharge mode of the first inductor L1 in the rectification boost mode when the input voltage is the positive half axis according to an embodiment of the present invention, wherein the electric energy in the first inductor L1 can be boosted for the third capacitor C3 from the following path: first inductor L1→third diode D3→first diode D1→controllable switch RY1→third capacitor C3→controllable switch RY2→second diode D2→second switch tube Q2→neutral line→live line→first inductor L1. Through the above path, the electric energy on the first inductor L1 can be transmitted to the third capacitor C3, and the boost of the third capacitor C3 is completed when the input AC power is in the positive half axis.

[0065] In the negative half axis, after the first inductor L1 is fully charged, the first switch tube Q1 is first controlled to be turned on and the second switch tube Q2 is turned off. The electric energy on the first inductor L1 flows out from one end of the first inductor L1, first returns to the neutral line through the live wire, and then flows from the neutral line to the second end in the topology module 110. At the second end in the topology module 110, since the first switch tube Q1 is in the on state and the second switch tube Q2 is in the off state, the current can pass through the first switch tube Q1, flow to the anode of the first diode D1, and then flow out from the cathode of the first diode D1, and flow into the third capacitor C3 through the controllable switch RY1. After flowing out of the third capacitor C3, the current can flow to the anode of the fourth diode D4 through the controllable switch RY2, and then flow out from the cathode of the fourth diode D4, and then return to the first inductor L1 from the cathode of the fourth diode D4 to form a loop.

[0066] Thus, the electric energy obtained by charging the first inductor L1 can be used to boost the voltage of the third capacitor C3. That is, after the first inductor L1 is charged, it is boosted to the third capacitor C3, that is, in the negative half-axis boost process, Figure 8 As shown, Figure 8 This is the discharge mode of the first inductor L1 in the rectification boost mode when the input voltage is the negative half axis according to an embodiment of the present invention, wherein the electric energy in the first inductor L1 can be boosted for the third capacitor C3 from the following path: first inductor L1→neutral line→live line→first switch tube Q1→first diode D1→controllable switch RY1→third capacitor C3→controllable switch RY2→second diode D2→fourth diode D4→first inductor L1. Through the above path, the electric energy on the first inductor L1 can be transmitted to the third capacitor C3, and the boost of the third capacitor C3 is completed when the input AC power is in the negative half axis.

[0067] In some embodiments of the present invention, Fig. 9 As shown, the switching unit 12 can also include a voltage detection module 121 and a control module 122, wherein the detection module 121 can detect the voltage amplitude corresponding to the input alternating current, and the control module 122 can control the controllable switch RY1 and the controllable switch RY2 according to the voltage amplitude detected by the detection module 121 to switch the working mode of the conversion unit 11.

[0068] First of all, it should be noted that the switching unit 12 of the embodiment of the present invention may include a controllable switch RY1, a controllable switch RY2, a detection module 121 and a control module 122, wherein the detection module 121 can be connected to the input alternating current to detect the voltage amplitude corresponding to the input alternating current, and then determine the AC voltage of the power supply circuit currently connected to the household appliance. After obtaining the AC voltage, the control module 122 can control the closing status of the controllable switch RY1 and the controllable switch RY2 according to the voltage.

[0069] For example, when the detection module 121 detects that the voltage amplitude in the input AC power is a low voltage, the control module 122 can control the controllable switch RY1 and the controllable switch RY2 to switch accordingly according to the low voltage information, so that the conversion unit 11 works in the rectification and voltage doubling and boosting working mode. It can be understood that the low voltage range can be 80 volts to 140 volts, and the high voltage range can be 170 volts to 280 volts. In the low voltage range, the control module 122 can control the first end and the second end of the controllable switch RY1 to be connected, and the first end and the second end of the controllable switch RY2 to be connected, so that the conversion unit 11 can enter the rectification and voltage doubling and boosting working mode. In the high voltage range, the control module 122 can control the first end and the third end of the controllable switch RY1 to be connected, and the first end and the third end of the controllable switch RY2 to be connected, so that the conversion unit 11 can enter the rectification and voltage doubling and boosting working mode.

[0070] In some embodiments of the present invention, Fig. 9 As shown, the power supply circuit 10 includes an EMC processing unit 13 and a soft start unit 14, wherein the EMC processing unit 13 and the soft start unit 14 can be connected between the input AC power and the conversion unit 11, the EMC processing unit 13 can process the AC power in an anti-interference manner, and the soft start unit 14 can be used for soft starting the power supply circuit.

[0071] Specifically, in this embodiment, before the input AC power is input to the conversion unit 11, it can also be processed by the EMC processing unit 13, wherein the EMC processing unit 13 can mainly complete the rectification of the disturbance voltage and disturbance power, and suppress the diffusion of various harmonic components and various high-frequency waves, so that the power supply circuit can not affect the normal operation of other devices during operation. After the input AC power is processed by the EMC processing unit 13, it can also pass through the soft start unit 14, and the soft start unit 14 mainly charges the capacitor slowly. After the input AC power is processed by the EMC processing unit, it can slowly charge the electrolytic capacitor through the PTC thermistor. When the bus voltage reaches the threshold, the controller can send a drive signal to control the RY3 relay to close, and then the power supply circuit can start to work normally.

[0072] It should be noted that the power supply circuit in the embodiment of the present invention may further include a sampling resistor, and the sampling resistor may be used to collect the input current of the circuit and then provide it to the power supply circuit for control.

[0073] In summary, the power supply circuit in the household appliance in the embodiment of the present invention can realize the voltage boosting function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitiveness, and increase the applicability of the product.

[0074] Fig.10 is a structural block diagram of a household appliance according to an embodiment of the present invention.

[0075] Furthermore, if Fig.10 As shown, the present invention proposes a household appliance 100, which includes the power supply circuit 10 in the household appliance in the above embodiment.

[0076] The household appliance of the embodiment of the present invention can realize the voltage boosting function of different voltage systems through the power supply circuit in the above embodiment, expand the working voltage range of the power supply circuit, improve the product's competitiveness, and increase the applicability of the product.

[0077] Fig.11 is a flow chart of a method for controlling a power supply circuit in a household appliance according to an embodiment of the present invention.

[0078] Furthermore, if Fig.11 As shown, the present invention proposes a control method in a power supply circuit, wherein, referring to Figure 1 It can be known that the power supply circuit 10 may include a conversion unit 11, and the conversion unit 11 may be used to convert the input alternating current into direct current, and then supply power to the load, wherein the control method may include the following steps:

[0079] S10, detecting the voltage amplitude of the input alternating current.

[0080] Specifically, the execution subject of the control method in the embodiment of the present invention may be Figure 1 The switching unit 12 shown in FIG. Fig. 9 The switching unit 12 in this embodiment may include a controllable switch RY1, a controllable switch RY2, a detection module 121 and a control module 122, wherein the detection module 121 may be connected to the input alternating current to detect the corresponding voltage amplitude in the input alternating current.

[0081] S20, switching the working mode in the conversion unit according to the voltage amplitude of the input alternating current, wherein the working mode in the conversion unit may include a rectification and voltage doubling working mode and a conditioning and voltage boosting working mode.

[0082] After detecting the voltage amplitude of the input AC power, it is possible to determine the AC voltage of the power supply circuit currently connected to the household appliance. After obtaining the AC voltage, the control module 122 can control the closing status of the controllable switch RY1 and the controllable switch RY2 according to the voltage.

[0083] For example, when the detection module 121 detects that the voltage amplitude in the input AC power is a low voltage, the control module 122 can control the controllable switch RY1 and the controllable switch RY2 to switch accordingly according to the low voltage information, so that the conversion unit 11 works in the rectification and voltage doubling and boosting working mode. It can be understood that the low voltage range can be 80 volts to 140 volts, and the high voltage range can be 170 volts to 280 volts. In the low voltage range, the control module 122 can control the first end and the second end of the controllable switch RY1 to be connected, and the first end and the second end of the controllable switch RY2 to be connected, so that the conversion unit 11 can enter the rectification and voltage doubling and boosting working mode. In the high voltage range, the control module 122 can control the first end and the third end of the controllable switch RY1 to be connected, and the first end and the third end of the controllable switch RY2 to be connected, so that the conversion unit 11 can enter the rectification and voltage doubling and boosting working mode.

[0084] In this embodiment, if Fig. 9 As shown, the transformation unit 11 includes a first inductor L1, a first diode D1, a second diode D2, a first capacitor C1, a second capacitor C2 and a third capacitor C3.

[0085] Among them, one end of the first inductor L1 can be connected to the live wire L in the input alternating current; the first end of the totem pole topology module 110 can be connected to the other end of the first inductor L1, and the second end of the totem pole topology module 111 can be connected to the neutral line N in the input alternating current; the anode of the first diode D1 can be connected to the third end of the totem pole topology module 110; the cathode of the second diode D2 can be connected to the fourth end of the totem pole topology module 110; one end of the first capacitor C1 can be connected to the cathode of the first diode D1 through the switching unit 12, the other end of the first capacitor C1 is connected to one end of the second capacitor C2 and has a first node P1, the other end of the second capacitor C2 can be connected to the anode of the second diode D2 through the switching unit 12, and the first node P1 is connected to the second end of the totem pole topology module 111; one end of the third capacitor C3 can be connected to the cathode of the first diode D1 through the switching unit 12, and the other end of the third capacitor C3 can be connected to the anode of the second diode D2 through the switching unit 12.

[0086] Specifically, see first Figure 2It can be seen that one end of the first inductor L1 is connected to the live wire L, and the other end is connected to the first end of the topology module 110. It should be noted that the AC power can charge the first inductor L1 so that electrical energy is stored in the first inductor L1. Then, during the working process after charging is completed, the electrical energy stored in the first inductor L1 can be provided to the first capacitor C1, the second capacitor C2 or the third capacitor C3, so the bus voltage can be increased, thereby increasing the supply voltage of the load.

[0087] The first diode D1 is connected to the first capacitor C1 through the switching unit 12, and the second diode D2 is connected to the second capacitor C2 through the switching unit 12. It should be noted that the switching unit 12 in this embodiment can be Figure 1 . For example, the switching unit 12 connecting the first diode D1 and the first capacitor C1 may be a switch, and the switching unit 12 connecting the second diode D2 and the second capacitor C2 may be another switch. In addition, since the first node P1 provided in the first capacitor C1 and the second capacitor C2 is connected to the second end in the topology module 110, and the second end in the topology structure 110 is connected to the neutral line N in the alternating current, the first node P1 is also connected to the neutral line N in the alternating current.

[0088] Therefore, in the positive half axis of the alternating current, one end of the first inductor L1 is connected to the live wire L of the alternating current, and then the other end of the first inductor L1 can be connected to the first node P1 through the first diode D1, the switching unit 12 and the first capacitor C1 after passing through the topological module 110, thereby returning to the neutral line N of the alternating current to form a loop, and then the electric energy stored in the first inductor L1 can be provided to the first capacitor C1 to increase the voltage of the first capacitor C1; in the negative half axis of the alternating current, one end of the first inductor L1 is connected to the live wire L of the alternating current, and then the other end of the first inductor L1 can be connected to the first node P1 through the second diode D2, the switching unit 12 and the second capacitor C2 after passing through the topological module 110, thereby returning to the neutral line N of the alternating current to form a loop, and then the electric energy stored in the first inductor L1 can be provided to the second capacitor C2 to increase the voltage of the second capacitor C2.

[0089] In the process of increasing the voltage of the third capacitor C3, in the positive half axis of the alternating current, one end of the first inductor L1 is connected to the live wire L of the alternating current, and then the other end of the first inductor L1 passes through the topological module 110, and can be connected to the topological module 110 through the first diode D1, the switching unit 12, the third capacitor C3, the switching unit 12 and the second diode D2, and then connected to the zero line N of the alternating current through the second end of the topological module 110, so as to return to the zero line N of the alternating current, forming a loop, and then the electric energy stored in the first inductor L1 can be provided to the third capacitor C3 to increase the voltage of the third capacitor C3. The voltage of the three capacitors C3; in the negative half axis of the alternating current, one end of the first inductor L1 is connected to the live wire L of the alternating current, and then the other end of the first inductor L1 passes through the topological module 110, and can be connected to the topological module 110 through the second diode D2, the switching unit 12, the third capacitor C3, the switching unit 12 and the first diode D1, and then connected to the zero line N of the alternating current through the second end of the topological module 110, so as to return to the zero line N of the alternating current, forming a loop, and then the electric energy stored in the first inductor L1 can be provided to the third capacitor C3 to increase the voltage of the third capacitor C3

[0090] Step S20 in this embodiment switches the working mode in the conversion unit 11 according to the voltage amplitude in the input AC power, including: controlling the state of the controllable switch RY1 and the state of the controllable switch RY2 according to the voltage amplitude in the input AC power to switch the working mode in the conversion unit 11.

[0091] In this embodiment, it should be noted that the switching unit 12 may include a controllable switch RY1 and a controllable switch RY2. Optionally, the controllable switch RY1 and the controllable switch RY2 may be single-pole double-throw switches, wherein the fixed end, i.e., the first end, of the controllable switch RY1 may be connected to the cathode of the first diode D1, and the two moving ends, i.e., the second end and the third end, of the controllable switch RY1 may be connected to the first capacitor C1 and the third capacitor C3, respectively. By controlling the moving end of the controllable switch RY1, the first capacitor C1 or the third capacitor C3 may be controlled to be connected to the circuit, so that the circuit may be controlled to switch in different working modes. The fixed end, i.e., the first end, of the controllable switch RY2 may be connected to the anode of the second diode D2, and the two moving ends, i.e., the second end and the third end, of the controllable switch RY2 may be connected to the second capacitor C2 and the third capacitor C3, respectively. By controlling the moving end of the controllable switch RY2, the second capacitor C2 or the third capacitor C3 may be controlled to be connected to the circuit, so that the circuit may be controlled to switch in different working modes. It can be understood that by controlling the controllable switch RY1 and the controllable switch RY2, it is possible to control whether the first capacitor C1 and the second capacitor C2 are connected to the circuit, or the third capacitor C3 is connected to the circuit. It should be noted that the circuit working mode when the first capacitor C1 and the second capacitor C2 are connected to the circuit is different from the circuit working mode when the third capacitor C3 is connected to the circuit. In the case where the first capacitor C1 and the second capacitor C2 are connected to the circuit, the circuit working mode can be a rectification and voltage doubling working mode; when the third capacitor C3 is connected to the circuit, the circuit working mode can be a rectification and voltage boosting working mode.

[0092] In this embodiment, that is, when the first end and the third end of the controllable switch RY1 are connected, and the first end and the third end of the controllable switch RY2 are connected, the working mode of the conversion unit 11 in the power supply circuit can be rectification and boost, that is, the conversion unit 11 can work in the rectification and boost working mode; when the first end and the second end of the controllable switch RY1 are connected, and the first end and the second end of the controllable switch RY2 are connected, the working mode of the conversion unit 11 in the power supply circuit can be the rectification and voltage doubling working mode, that is, the conversion unit 11 can work in the rectification and voltage doubling working mode.

[0093] When the conversion unit 11 in the power supply circuit is in the rectification and voltage doubling working mode, the specific voltage boosting method is as follows: in the positive half axis, when the first inductor L1 passes through Figure 3After the charging method shown is completed, the first switch tube Q1 can be disconnected. After the first switch tube Q1 is disconnected, the current on the first inductor L1 can flow out from the other end of the first inductor L1, and then connect to the anode of the third diode D3 in the topology module 110 through the first end in the topology module 110, and then flow out from the cathode of the third diode D3. Since the state of the first switch tube Q1 is disconnected at this time, the current can flow into the anode of the first diode D1 after flowing out from the cathode of the third diode D3, and flow out from the cathode of the first diode D1, and then flow into one end of the first capacitor C1 through the controllable switch RY1, and then flow out from the second end of the first capacitor C2, and then reach the first node P1 to return to the zero line, forming a loop, so that the electric energy obtained by charging in the first inductor L1 can be used to boost the first capacitor C1. That is to say, after the first inductor L1 is fully charged and boosted to the first capacitor C1, that is, in the process of positive half-axis boosting, as shown in Figure 5 As shown, Figure 5 This is the discharge mode of the first inductor L1 in the rectification voltage doubling boost mode with the input voltage being the positive half axis according to an embodiment of the present invention, wherein the electric energy in the first inductor L1 is boosted for the first capacitor C1 through the following path: live wire → first inductor L1 → third diode D3 → first diode D1 → controllable switch RY1 → first capacitor C1 → neutral wire. Through the above path, the electric energy on the first inductor L1 can be transmitted to the first capacitor C1, thereby completing the boost of the first capacitor C1.

[0094] In the negative half axis, when the first inductor L1 passes through Figure 4 After the charging is completed, the second switch tube Q2 can be turned off. After the second switch tube Q2 is turned off, Figure 6 As shown, the current on the first inductor L1 can flow from one end of the first inductor L1 to the live wire, then flow to the first node P1 through the neutral wire, flow through one end of the second capacitor C2, then flow out from the other end of the second capacitor C2, flow to the anode of the second diode D2 through the controllable switch RY2, and flow from the cathode of the second diode D2 to the anode of the fourth diode D4, and then flow from the cathode of the fourth diode D4 to the other end of the first inductor L1, forming a loop, so that the electric energy obtained by charging in the first inductor L1 can be used to boost the voltage of the second capacitor C2. That is to say, after the first inductor L1 is charged, it boosts the voltage of the second capacitor C2, that is, in the negative half-axis boost process, as shown Figure 6 As shown, Figure 6This is the discharge mode of the first inductor L1 in the rectification voltage doubling boost mode with the input voltage of the negative half axis according to an embodiment of the present invention, wherein the electric energy in the first inductor L1 can be boosted for the second capacitor C2 from the following path: first inductor L1→live wire→neutral wire→second capacitor C2→controllable switch RY2→second diode D2→fourth diode D4→first inductor L1. Through the above path, the electric energy on the first inductor L1 can be transmitted to the second capacitor C2, thereby completing the boost of the second capacitor C2.

[0095] After completing the voltage boost of the first capacitor C1 and the second capacitor C2, the voltage obtained by the busbar formed by the first capacitor C1 and the second capacitor C2 can be increased, thereby providing a sufficiently high voltage for the home appliance to ensure that the home appliance can work normally and improve the user experience.

[0096] In the rectification and boost working mode, the first end and the third end of the controllable switch RY1 are connected, and the first end and the third end of the controllable switch RY2 are connected, and the third capacitor C3 is connected in the circuit. It should be noted that in the rectification and boost working mode, the charging process of the first inductor L1 is similar to the charging process corresponding to the rectification and voltage doubling working mode, and will not be repeated here.

[0097] In this rectification and boosting operation mode, how the first inductor L1 transmits electric energy to the third capacitor C3 is described in detail. Figure 7 As shown, in the positive half axis, after the first inductor L1 is fully charged, the first switch tube Q1 is first controlled to be turned off, and the second switch tube Q2 is turned on. The electric energy on the first inductor L1 flows out from the other end of the first inductor L1, flows from the first end in the topology module 110 into the anode of the third diode D3 in the topology module 110, and flows out from the cathode of the third diode D3. Since the first switch tube Q1 is turned off, the current does not pass through the first switch tube Q1 at this time, but directly flows to the anode of the first diode D1, and then flows out from the cathode of the first diode D1. Since the first end and the third end of the controllable switch RY1 are connected, the current flowing out from the cathode of the first diode D1 can flow to the third capacitor C3 through the controllable switch RY1. Since the first end and the third end of the controllable switch RY2 are connected, the current flowing out from the third capacitor C3 can flow to the anode of the second diode D2 through the controllable switch RY2, and flow to the cathode through the second diode D2. Since the second switch tube Q2 is in the on state at this time, the current can flow from the cathode of the second diode D2 to the second switch tube Q2, and then flow from the second end in the topology module 110 to the neutral line to form a loop.

[0098] Thus, the electric energy obtained by charging the first inductor L1 can be used to boost the voltage of the third capacitor C3. That is, after the first inductor L1 is charged, it is boosted to the third capacitor C3, that is, in the positive half-axis boost process, Figure 7 As shown, Figure 7 This is the discharge mode of the first inductor L1 in the rectification boost mode when the input voltage is the positive half axis according to an embodiment of the present invention, wherein the electric energy in the first inductor L1 can be boosted for the third capacitor C3 from the following path: first inductor L1→third diode D3→first diode D1→controllable switch RY1→third capacitor C3→controllable switch RY2→second diode D2→second switch tube Q2→neutral line→live line→first inductor L1. Through the above path, the electric energy on the first inductor L1 can be transmitted to the third capacitor C3, and the boost of the third capacitor C3 is completed when the input AC power is in the positive half axis.

[0099] In the negative half axis, after the first inductor L1 is fully charged, the first switch tube Q1 is first controlled to be turned on and the second switch tube Q2 is turned off. The electric energy on the first inductor L1 flows out from one end of the first inductor L1, first returns to the neutral line through the live wire, and then flows from the neutral line to the second end in the topology module 110. At the second end in the topology module 110, since the first switch tube Q1 is in the on state and the second switch tube Q2 is in the off state, the current can pass through the first switch tube Q1, flow to the anode of the first diode D1, and then flow out from the cathode of the first diode D1, and flow into the third capacitor C3 through the controllable switch RY1. After flowing out of the third capacitor C3, the current can flow to the anode of the fourth diode D4 through the controllable switch RY2, and then flow out from the cathode of the fourth diode D4, and then return to the first inductor L1 from the cathode of the fourth diode D4 to form a loop.

[0100] Thus, the electric energy obtained by charging the first inductor L1 can be used to boost the voltage of the third capacitor C3. That is, after the first inductor L1 is charged, it is boosted to the third capacitor C3, that is, in the negative half-axis boost process, Figure 8 As shown, Figure 8 This is the discharge mode of the first inductor L1 in the rectification boost mode when the input voltage is the negative half axis according to an embodiment of the present invention, wherein the electric energy in the first inductor L1 can be boosted for the third capacitor C3 from the following path: first inductor L1→neutral line→live line→first switch tube Q1→first diode D1→controllable switch RY1→third capacitor C3→controllable switch RY2→second diode D2→fourth diode D4→first inductor L1. Through the above path, the electric energy on the first inductor L1 can be transmitted to the third capacitor C3, and the boost of the third capacitor C3 is completed when the input AC power is in the negative half axis.

[0101] In some embodiments of the present invention, the state of the controllable switch RY1 and the state of the controllable switch RY2 are controlled according to the voltage amplitude in the input alternating current, including: when the voltage amplitude in the input alternating current is within a first preset voltage range, the first end of the controllable switch RY1 is controlled to be connected to the third end, and the first end of the controllable switch RY2 is controlled to be connected to the third end, so that the conversion unit 11 can operate in a rectification and boosting operating mode; when the voltage amplitude in the input alternating current is within a second preset voltage range, the first end of the controllable switch RY1 is controlled to be connected to the second end, and the first end of the controllable switch RY2 is controlled to be connected to the second end, so that the conversion unit 11 can operate in a rectification and voltage doubling and boosting operating mode, wherein the upper limit of the first preset voltage range is less than the lower limit of the second preset voltage range.

[0102] First of all, it should be noted that the switching unit 12 of the embodiment of the present invention may include a controllable switch RY1, a controllable switch RY2, a detection module 121 and a control module 122, wherein the detection module 121 can be connected to the input alternating current to detect the voltage amplitude corresponding to the input alternating current, and then determine the AC voltage of the power supply circuit currently connected to the household appliance. After obtaining the AC voltage, the control module 122 can control the closing status of the controllable switch RY1 and the controllable switch RY2 according to the voltage.

[0103] For example, when the detection module 121 detects that the voltage amplitude in the input AC power is a low voltage, the control module 122 can control the controllable switch RY1 and the controllable switch RY2 to switch accordingly according to the low voltage information, so that the conversion unit 11 works in the rectification and voltage doubling and boosting working mode. It can be understood that the low voltage range is the first preset voltage range, which can be 80 volts to 140 volts, and the high voltage range is the second preset voltage range, which can be 170 volts to 280 volts. In the low voltage range, the control module 122 can control the first end and the second end of the controllable switch RY1 to be connected, and the first end and the second end of the controllable switch RY2 to be connected, so that the conversion unit 11 can enter the rectification and voltage doubling and boosting working mode. In the high voltage range, the control module 122 can control the first end and the third end of the controllable switch RY1 to be connected, and the first end and the third end of the controllable switch RY2 to be connected, so that the conversion unit 11 can enter the rectification and voltage doubling and boosting working mode.

[0104] It should be noted that, for other specific implementations of the control method in the embodiment of the present invention, reference can be made to the specific implementation process of the switching unit in the power supply circuit in the above embodiment, which will not be described in detail here.

[0105] In summary, the power supply circuit control method in the household appliance of the embodiment of the present invention can realize the voltage boost function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitiveness, and increase the applicability of the product.

[0106] Furthermore, the present invention proposes a computer-readable storage medium on which a control program for a power supply circuit of a household appliance is stored. When the control program for the power supply circuit of the household appliance is executed by a processor, a control method for the power supply circuit of the household appliance as in the above-mentioned embodiment is implemented.

[0107] The computer-readable storage medium in the embodiment of the present invention, the processor executes the control program stored on the storage medium, can realize the boost function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitiveness, and increase the applicability of the product.

[0108] Fig.12 is a structural block diagram of a household appliance according to an embodiment of the present invention.

[0109] Furthermore, if Fig.12 As shown, the present invention proposes a household appliance 200, which includes a memory 201, a processor 202, and a control program for a power supply circuit of the household appliance stored in the memory 201 and executable on the processor 202. When the processor executes the control program for the power supply circuit of the household appliance, a control method for the power supply circuit of the household appliance in the above-mentioned embodiment is implemented.

[0110] The household appliance in the embodiment of the present invention includes a memory and a processor. The processor executes a control program stored in the memory, which can realize the voltage boost function of different voltage systems, expand the working voltage range of the power supply circuit, improve the product's competitiveness, and increase the applicability of the product.

[0111] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0112] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0113] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0114] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0115] In addition, the terms "first", "second", etc. used in the embodiments of the present invention are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in the present embodiment. Therefore, the features defined by the terms "first", "second", etc. in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of the present invention, the word "multiple" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0116] In the present invention, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" etc. in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific implementation situation.

[0117] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0118] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A power supply circuit for household appliances, characterized in that: include: A sampling resistor, wherein the sampling resistor is used to collect input current; A conversion unit, the conversion unit is used to convert the input alternating current into direct current to supply power to the load; A switching unit, wherein the switching unit switches the working mode of the conversion unit according to the voltage amplitude of the input alternating current, wherein the working mode of the conversion unit includes a rectification voltage doubling and boosting working mode and a rectification voltage boosting working mode; The transformation unit comprises: a first inductor, one end of which is connected to a live wire of the input alternating current; A totem pole topology module, wherein a first end of the totem pole topology module is connected to the other end of the first inductor, and a second end of the totem pole topology module is connected to the neutral line of the input alternating current; a first diode, wherein an anode of the first diode is connected to a third end of the totem pole topology module; a second diode, wherein a cathode of the second diode is connected to a fourth end of the totem pole topology module; a first capacitor and a second capacitor, wherein one end of the first capacitor is connected to the cathode of the first diode through the switching unit, the other end of the first capacitor is connected to one end of the second capacitor and has a first node, the other end of the second capacitor is connected to the anode of the second diode through the switching unit, and the first node is connected to the second end of the totem pole topology module; A third capacitor, one end of the third capacitor is connected to the cathode of the first diode through the switching unit, and the other end of the third capacitor is connected to the anode of the second diode through the switching unit.

2. The power supply circuit of the household appliance according to claim 1, characterized in that: The totem pole topology module includes: a third diode, wherein an anode of the third diode serves as a first end of the totem pole topology module; a fourth diode, wherein a cathode of the fourth diode is connected to an anode of the third diode, and the anode of the fourth diode serves as a fourth end of the totem pole topology module; A first switch tube, wherein a first end of the first switch tube is connected to a cathode of the third diode and serves as a third end of the totem pole topology module; A second switch tube, wherein the first end of the second switch tube is connected to the second end of the first switch tube and serves as the second end of the totem pole topology module, and the second end of the second switch tube is connected to the anode of the fourth diode.

3. The power supply circuit of the household appliance according to claim 1, characterized in that: The switching unit includes a first controllable switch and a second controllable switch, wherein a first end of the first controllable switch is connected to a cathode of the first diode, a second end of the first controllable switch is connected to one end of the first capacitor, a third end of the first controllable switch is connected to one end of the third capacitor, a first end of the second controllable switch is connected to an anode of the second diode, a second end of the second controllable switch is connected to the other end of the second capacitor, and a third end of the second controllable switch is connected to the other end of the third capacitor.

4. The power supply circuit of the household appliance according to claim 3, characterized in that: The switching unit also includes a voltage detection module and a control module. The voltage detection module is used to detect the voltage amplitude of the input AC power. The control module controls the first controllable switch and the second controllable switch according to the voltage amplitude of the input AC power to switch the working mode of the conversion unit.

5. The power supply circuit of household electrical appliances according to claim 3, characterized in that: When the first end of the first controllable switch is connected to the third end, and the first end of the second controllable switch is connected to the third end, the conversion unit operates in a rectification and boosting working mode; when the first end of the first controllable switch is connected to the second end, and the first end of the second controllable switch is connected to the second end, the conversion unit operates in a rectification and voltage doubling and boosting working mode.

6. The power supply circuit of the household appliance according to any one of claims 1 to 5, characterized in that: It also includes an EMC processing unit and a soft start unit, which are connected between the input AC power and the conversion unit. The EMC processing unit performs anti-interference processing on the input AC power, and the soft start unit is used to realize soft start of the power supply circuit.

7. A household appliance, characterized in that: The invention comprises a power supply circuit of the household appliance as claimed in any one of claims 1 to 6.

8. A method for controlling a power supply circuit of a household appliance, characterized in that: The power supply circuit includes a conversion unit, and the conversion unit is used to convert input alternating current into direct current to supply power to a load. The method includes: Detecting the voltage amplitude of the input alternating current; Switching the working mode of the conversion unit according to the voltage amplitude of the input alternating current, wherein the working mode of the conversion unit includes a rectification voltage doubling and boosting working mode and a rectification voltage boosting working mode; The conversion unit includes: a first inductor, a totem pole topology module, a first diode, a second diode, a first capacitor, a second capacitor and a third capacitor, one end of the first inductor is connected to the live wire of the input alternating current, the first end of the totem pole topology module is connected to the other end of the first inductor, the second end of the totem pole topology module is connected to the neutral wire of the input alternating current, the anode of the first diode is connected to the third end of the totem pole topology module, the cathode of the second diode is connected to the fourth end of the totem pole topology module, the cathode of the first diode is connected to the first end of the first controllable switch, one end of the first capacitor is connected to the second end of the first controllable switch, one end of the third capacitor is connected to the third end of the first controllable switch, the other end of the first capacitor is connected to one end of the second capacitor and has a first node, the first node is connected to the second end of the totem pole topology module, the anode of the second diode is connected to the first end of the second controllable switch, the second end of the second controllable switch is connected to the other end of the second capacitor, and the third end of the second controllable switch is connected to the other end of the third capacitor, wherein switching the working mode of the conversion unit according to the voltage amplitude of the input alternating current includes: The state of the first controllable switch and the state of the second controllable switch are controlled according to the voltage amplitude of the input alternating current to switch the working mode of the conversion unit.

9. The method for controlling a power supply circuit of a household appliance according to claim 8, characterized in that: Controlling the state of the first controllable switch and the state of the second controllable switch according to the voltage amplitude of the input alternating current includes: When the voltage amplitude of the input alternating current is within a first preset voltage range, controlling the first end of the first controllable switch to be connected to the third end, and controlling the first end of the second controllable switch to be connected to the third end, so that the conversion unit operates in a rectification and boosting operation mode; When the voltage amplitude of the input alternating current is within a second preset voltage range, the first end of the first controllable switch is controlled to be connected to the second end, and the first end of the second controllable switch is controlled to be connected to the second end, so that the conversion unit operates in a rectification and voltage doubling working mode, wherein the upper limit of the first preset voltage range is less than the lower limit of the second preset voltage range.

10. A computer-readable storage medium, characterized in that: A control program for a power supply circuit of a household appliance is stored thereon, and when the control program for the power supply circuit of the household appliance is executed by a processor, a control method for a power supply circuit of a household appliance as described in any one of claims 8 to 9 is implemented.

11. A household appliance, characterized in that: The invention comprises a memory, a processor and a control program for a power supply circuit of a household appliance which is stored in the memory and can be run on the processor. When the processor executes the control program for the power supply circuit of the household appliance, a control method for the power supply circuit of the household appliance as described in any one of claims 8 to 9 is implemented.

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