Circuit and air conditioner

Abstract

The utility model provides a circuit and an air conditioner, the circuit comprises a power factor correction circuit, a load, a voltage division circuit and a processor, the power factor correction circuit comprises a first rectifier bridge, the voltage division circuit comprises a second rectifier bridge, and the processor is used for correcting the power factor correction circuit according to the current of the load and the power supply voltage and the power supply current of a power supply. Taking the output voltage of the first rectifier bridge or the output voltage of the second rectifier bridge as a target voltage; according to the power calculation method, the output voltages of different rectifier bridges are selected as the target voltages according to different conditions, so that the processor can flexibly select the output voltages of the corresponding rectifier bridges as the target voltages according to load conditions; the embodiment of the utility model is helpful for improving the accuracy of power calculation.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit technical field especially is related to a circuit and air conditioner. BACKGROUND

[0002] At present, more and more users pay attention to the electric power consumed by air conditioner outdoor unit, generally, three kinds of power, active power, reactive power, apparent power are involved in the power calculation of air conditioner circuit, wherein, apparent power includes active power and reactive power, and is obtained by multiplying effective voltage and effective current. In PFC (Power Factor Correction, power factor correction) circuit, the commonly used power calculation method has some problems, different overloads of different loads will cause different influences on the sampled voltage, thereby affecting the power calculation, and the opening of PFC will also cause the variation of power factor, resulting in the great difference between the power calculated by program and the power actually consumed by outdoor unit. SUMMARY

[0003] In view of the above problems, the utility model embodiment is provided to provide a circuit and air conditioner to overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, the utility model embodiment discloses a circuit, which comprises:

[0005] A power factor correction circuit is connected with a power supply, and the power factor correction circuit comprises a first rectifier bridge and a power factor corrector; the first rectifier bridge is used for receiving alternating current output by the power supply and converting the alternating current into direct current;

[0006] A load is connected with the power factor correction circuit and is used for receiving direct current output by the power factor correction circuit;

[0007] A voltage dividing circuit is connected with the power factor correction circuit in parallel, and the voltage dividing circuit comprises a second rectifier bridge and is used for receiving alternating current output by the power supply and converting the alternating current into direct current;

[0008] A processor is used for acquiring output voltage of the first rectifier bridge, output voltage of the second rectifier bridge, current of the load and power supply voltage and power supply current of the power supply; the output voltage of the first rectifier bridge or the output voltage of the second rectifier bridge is taken as target voltage; and the power of the load is determined according to the target voltage.

[0009] Optionally, the processor is configured to select the output voltage of the first rectifier bridge or the output voltage of the second rectifier bridge as the target voltage according to a comparison result of the current of the load and a preset load current value, a comparison result of the power supply voltage and a preset power supply voltage value, and a comparison result of the power supply current and a preset power supply current value.

[0010] Optionally, the processor is configured to select the output voltage of the first rectifier bridge as the target processing voltage when the current of the load is less than the preset load current value, the power supply voltage is less than the preset power supply voltage value, and the power supply current is less than the preset power supply current value.

[0011] Optionally, the processor is configured to adjust a duty cycle of a pulse modulation signal for the power factor corrector to increase the output voltage of the first rectifier bridge when the current of the load is less than the preset load current value, the power supply voltage is greater than the preset power supply voltage value, and the power supply current is less than the preset power supply current value; and select the output voltage of the first rectifier bridge as the target voltage after the increase.

[0012] Optionally, the processor is configured to select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is greater than the preset load current value, the power supply voltage is greater than the preset power supply voltage value, and the power supply current is greater than the preset power supply current value.

[0013] Optionally, the processor is configured to select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is less than the preset load current value, the power supply voltage is greater than the preset power supply voltage value, and the power supply current is greater than the preset power supply current value.

[0014] Optionally, the processor is configured to select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is greater than the preset load current value, the power supply voltage is greater than the preset power supply voltage value, and the power supply current is less than the preset power supply current value.

[0015] Optionally, the processor is configured to select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is greater than the preset load current value, the power supply voltage is less than the preset power supply voltage value, and the power supply current is greater than the preset power supply current value.

[0016] Optionally, the processor is configured to select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is less than the preset load current value, the power supply voltage is less than the preset power supply voltage value, and the power supply current is greater than the preset power supply current value.

[0017] Optionally, the processor is configured to select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is greater than the preset load current value, the power supply voltage is less than the preset power supply voltage value, and the power supply current is less than the preset power supply current value.

[0018] Optionally, the power factor correction circuit further comprises a first sampling module, one end of which is connected with the first rectifier bridge and the other end of which is grounded, for collecting the output voltage of the first rectifier bridge.

[0019] Optionally, the circuit further comprises a third sampling module, which is connected in parallel with the power supply, for collecting the input voltage and input current of the power supply.

[0020] Optionally, the circuit further comprises a fourth sampling module, one end of which is connected with the load and the other end of which is grounded, for collecting the current of the load.

[0021] In another aspect, the utility model embodiment further provides a kind of air conditioner, comprising the circuit of any one described in the above embodiment.

[0022] The utility model embodiment sets up the method of dividing voltage circuit, and the circuit is divided into power factor correction circuit and dividing voltage circuit;The dividing voltage circuit can ensure that when the overload condition of load is complex, the input voltage and input current sampled in power factor correction circuit are inaccurate, the actual input voltage and current can be accurately obtained from the dividing voltage circuit, the accuracy of power calculation is improved, and the processor can flexibly select the corresponding target voltage according to the load condition, compared with the power calculation mode of prior art, the utility model embodiment helps to improve the accuracy of power calculation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structure schematic view of the circuit of the utility model embodiment;

[0024] Figure 2 It is a structure schematic view of another circuit of the utility model embodiment; DETAILED DESCRIPTION

[0025] In order to make the above purpose, features and advantages of the utility model more apparent, easy to understand, the utility model is further explained in detail below with the drawings and specific embodiment.

[0026] One of the core ideas of the utility model embodiment is that,

[0027] By setting dividing voltage circuit to divide the working circuit into isolation side and power side, the influence of the overload condition of load in the circuit on the sampling voltage in traditional technology is reduced, and power calculation result is more accurate by flexibly selecting power side sampling data or isolation side sampling data.

[0028] Referring to Figure 1 , a structure schematic view of a circuit of the utility model embodiment is shown, which can specifically include:

[0029] A power factor correction circuit 20 is connected with the power supply 10; the power factor correction circuit 20 comprises a first rectifier bridge (not shown in the figure) and a power factor corrector (not shown in the figure); the first rectifier bridge is used to receive the alternating current output by the power supply and convert the alternating current into direct current;

[0030] The rectifier bridge is a circuit element that converts alternating current into direct current by using the conduction and cutoff characteristics of diodes, generally composed of several diodes; the power factor correction circuit module is a circuit module containing a power factor corrector; the power factor corrector (PFC, Power Factor Correction) mainly controls the waveform of the input current to make it synchronous with the input voltage waveform, improves the power factor, and reduces the harmonic content, which can solve the problems of electromagnetic interference (EMI, Electromagnetic Interference) and electromagnetic compatibility (EMC, Electromagnetic Compatibility) caused by the severe distortion of the current waveform due to capacitive load. The power factor refers to the relationship between the effective power and the apparent power, and the power factor is used to measure the degree of effective use of electric power; the larger the power factor value, the higher the utilization rate of electric power in the circuit.

[0031] A load 40 is connected with the power factor correction circuit 20 and used to receive the direct current output by the power factor correction circuit 20;

[0032] The load 40 can be a circuit containing circuit operation service elements, such as compressor elements.

[0033] A voltage dividing circuit 30 is connected in parallel with the power factor correction circuit; the voltage dividing circuit 30 comprises a second rectifier bridge (not shown in the figure) and is used to receive the alternating current output by the power supply 10 and convert the alternating current into direct current; the voltage dividing circuit 30 is connected in parallel with the power factor correction circuit 20, receives the alternating current output by the power supply through the second rectifier bridge and converts the alternating current into direct current.

[0034] The voltage dividing circuit 30 can ensure accurate acquisition of the input voltage of the circuit when the load changes or the grid voltage fluctuates.

[0035] A processor (not shown in the figure) is used to acquire the output voltage of the first rectifier bridge, the output voltage of the second rectifier bridge, the current of the load, and the power supply voltage and power supply current of the power supply; according to the current of the load and the power supply voltage and power supply current of the power supply, the output voltage of the first rectifier bridge or the output voltage of the second rectifier bridge is taken as the target voltage; according to the target voltage, the power of the load is determined.

[0036] The processor is a processing module comprising a microcontroller (MCU, Microcontroller Unit), the microprocessor is responsible for executing the main logic control instruction of the electric appliance, processing the input signal of the user, and managing the communication with other modules; by storing a plurality of preset processing strategies in the micro manager in the air conditioner circuit, the power processing mode can be more close to the actual situation, and the calculation result is more accurate.

[0037] In an embodiment, the power factor correction circuit can further include a first sampling module connected to one end of the first rectifier bridge and grounded at the other end, for collecting the output voltage of the first rectifier bridge.

[0038] In an example, the first sampling module can be connected to an ADC (Analog-to-Digital Converter) pin of the processor, for providing the level of the output voltage of the first rectifier bridge. The structure and connection mode of the sampling module are not limited by the utility model.

[0039] In an embodiment, the voltage dividing circuit can further include a second sampling module connected to one end of the second rectifier bridge and grounded at the other end, for collecting the output voltage of the second rectifier bridge.

[0040] In an example, the second sampling module can be connected to another ADC pin of the processor, for providing the level of the output voltage of the second rectifier bridge. The structure and connection mode of the sampling module are not limited by the utility model.

[0041] In an embodiment, the circuit further includes a third sampling module connected in parallel with the power supply, for collecting the input voltage and input current of the power supply.

[0042] In an example, the third sampling module can include a voltage sampling module and a current sampling module, wherein the voltage sampling module can be connected to an ADC pin of the processor, for providing the level of the input voltage of the power supply; the current sampling module can be connected to another ADC pin of the processor, for converting the current into a voltage signal and then providing the corresponding level.

[0043] In an embodiment, the circuit can further include a fourth sampling module connected to one end of the load and grounded at the other end, for collecting the current of the load.

[0044] The utility model embodiment sets up the method of the voltage dividing circuit, and divides the circuit into the power factor correction circuit and the voltage dividing circuit, the voltage dividing circuit can guarantee the overload condition of the load is complex, leads to the input voltage and input current of the power factor correction circuit sampling is not accurate, can accurately obtain the actual input voltage and current from the voltage dividing circuit, improves the accuracy of power calculation, and the processor can select the corresponding target voltage flexibly according to the load condition, compared with the power calculation mode of prior art, the utility model embodiment is helpful to improve the accuracy of power calculation.

[0045] In one embodiment, referring to Figure 2 , another utility model embodiment of the circuit structure schematic diagram is shown, and specifically includes:

[0046] The sampling circuit 50 includes resistors R1, R2, R3 and R4, a sampling point Vin_simple1, and a sampling point for collecting voltage, and the structure is specifically as follows: the first end of R1 is connected with the first end of the first rectifier bridge DB1, the second end of R1 is connected with the first end of R2, the second end of R2 is connected with the first end of R3, the second end of R3 is connected with Vin_simple1, the first end of R4 is connected between the second end of R2 and the first end of R3, and the second end of R4 is grounded. The sampling circuit can also be other structures, and the utility model embodiment does not limit this.

[0047] The power factor correction circuit 20 includes the first rectifier bridge DB1, inductors L1 and L2, resistors R8, R9 and R10, switches G1 and G2, PWM modulation pulse signals PWM1 and PWM2, and a motor MOTOR, and the structure is specifically as follows: the first end of L1 is connected with the first end of DB1, the second end is connected with the first end of G1, the second end of G1 is used for receiving the modulation pulse signal PWM1, the third end of G2 is connected with the first end of R8, the second end of R8 is grounded, the first end of inductor L2 is connected with the first end of the rectifier bridge DB1, the second end of L2 is connected with the first end of switch G2, the second end of G2 is used for receiving the modulation pulse signal PWM2, the first end of R10 is connected with the third end of G2, the second end is grounded, the first end of R9 is connected with the second end of DB1, the second end of R9 is connected with the second end of MOTOR, and the first end of MOTOR is connected with the second end of inductor L2. The power factor correction circuit can also be other structures, and the utility model embodiment does not limit this.

[0048] The voltage dividing circuit 30 comprises a rectifier bridge DB2, resistors R5, R6 and R7, and a sampling point Vin_simple2 for collecting voltage, and is specifically connected in that a first end of the R5 is connected with a first end of the DB2, a second end of the R5 is connected with a first end of the R6, a second end of the R6 is connected with a first end of the Vin_simple2, a first end of the R7 is connected between the second end of the R6 and the first end of the Vin_simple2, and a second end of the R7 is grounded. The voltage dividing circuit can also be of other structures, which are not limited in the embodiments of the present application.

[0049] In an embodiment, the processor is configured to select the output voltage of the first rectifier bridge or the output voltage of the second rectifier bridge as the target voltage according to a comparison result of the current of the load and a preset load current value and a comparison result of the power supply voltage and a preset power supply voltage value.

[0050] By comparing the power supply current and the power supply voltage with preset power supply current and power supply voltage thresholds, corresponding voltage comparison results and current comparison results are obtained, the current of the load is compared with a preset load threshold, and a corresponding load current comparison result is obtained. The overload condition of the load at this time can be obtained by combining the three, and the microprocessor can select the target voltage of the corresponding rectifier bridge corresponding to the overload condition according to the overload condition of the load at this time, and calculate the power, so that the calculation result is more accurate.

[0051] In an embodiment, the processor is configured to select the output voltage of the first rectifier bridge as the target processing voltage when the current of the load is less than the preset load current value, the power supply voltage is less than the preset power supply voltage value, and the power supply current is less than the preset power supply current value.

[0052] When the current of the load is less than the preset load current value, the power supply voltage is less than the preset power supply voltage value, and the power supply current is less than the preset power supply current value, it is judged that the overload condition of the load at this time is light load. In this case, because the PFC opening degree is large, the power factor is high, and the overload condition of the load is in light load, the influence of the load on the power side voltage sampling is small, so the sampling value of the output voltage of the first rectifier bridge is selected as the voltage value participating in the power processing, that is, the value of Vin_simple1, thereby improving the power calculation efficiency.

[0053] In an embodiment, the processor is configured to adjust the duty cycle of the pulse modulation signal for the power factor corrector to increase the output voltage of the first rectifier bridge when the current of the load is less than the preset load current value, the power supply voltage is greater than the preset power supply voltage value, and the power supply current is less than the preset power supply current value, and select the output voltage of the first rectifier bridge after the increase as the target voltage.

[0054] When the current of the load is less than the preset load current value, the current of the power supply is less than the preset power supply current value, and the voltage of the power supply is greater than the preset power supply voltage value, the overload condition of the load is light load, but at this time, the voltage of the power supply is at a high level, so that the PFC opening degree is small in this case, and the power factor is small at this time, therefore, the duty cycle of the pulse modulation signal for the power factor corrector is adjusted to increase the output voltage of the first rectifier bridge;

[0055] In the air conditioner PFC circuit, the Boost architecture is usually used to adjust the phase of the input current and voltage by controlling the on-off of the switch tube, so as to realize power factor correction. Load change will affect the output voltage and current of the Boost circuit, and then affect the calculation and control of power. Its essence is a kind of boost circuit, mainly used for converting DC voltage into higher DC voltage. This circuit realizes the function of voltage boosting by controlling the on-off time ratio of the switch tube. The working principle of Boost architecture is based on inductance, switch tube and diode. When the switch tube is turned on, the inductor is charged, and the current flows through the switch tube and the inductor to the load; when the switch tube is turned off, the inductor is discharged, and the diode continues to supply power to the load, while charging the output capacitor. By repeating this process, the output voltage is finally higher than the input voltage

[0056] After increasing the output voltage of the first rectifier bridge, the value of Vin_simple1 is used as the voltage value participating in power processing for power calculation;

[0057] In an example, increasing the PFC opening degree can be realized by optimizing the control circuit, such as improving the accuracy of the zero voltage detector and adjusting the switching duty ratio. Duty ratio generally refers to the proportion of on time to total time in a pulse cycle. In the application scenario of this article, duty ratio refers to the ratio of switch-on time to whole cycle time in a switching cycle.

[0058] In this way, the inaccurate power calculation caused by the influence of PFC on power factor when the overload condition of the load is light load but the voltage of the power supply is too high is avoided.

[0059] In an embodiment, the processor is configured to select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is greater than the preset load current value, the voltage of the power supply is greater than the preset power supply voltage value, and the current of the power supply is greater than the preset power supply current value;

[0060] When the current of the load is less than the preset load current value, the current of the power supply is less than the preset power supply current value, and the voltage of the power supply is greater than the preset power supply voltage value, the overload condition of the load is light load, but at this time, the voltage of the power supply is at a high level, so that the PFC opening degree is small in this case, and the power factor is small at this time, therefore, the duty cycle of the pulse modulation signal for the power factor corrector is adjusted to increase the output voltage of the first rectifier bridge;

[0061] select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is greater than a preset load current value, the power supply voltage is greater than a preset power supply voltage value, and the power supply current is less than a preset power supply current value;

[0062] select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is greater than a preset load current value, the power supply voltage is less than a preset power supply voltage value, and the power supply current is greater than a preset power supply current value;

[0063] select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is less than a preset load current value, the power supply voltage is less than a preset power supply voltage value, and the power supply current is greater than a preset power supply current value;

[0064] select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is greater than a preset load current value, the power supply voltage is less than a preset power supply voltage value, and the power supply current is less than a preset power supply current value.

[0065] When the processor is used to judge the overload condition of the load as heavy load when the current of the load is greater than the preset load current value, the power supply voltage is greater than the preset power supply voltage value and the power supply current is greater than the preset power supply current value, the sampling value of the output voltage of the second rectifier bridge is used as the value of the voltage value Vin_simple2 participating in power processing at this time, power calculation is carried out, and the output voltage of the second rectifier bridge is selected as the target processing voltage. The situation of selecting the output voltage of the second rectifier bridge as the target processing voltage also includes: the normal state that the current of the load is less than the preset load current value, the power supply voltage is greater than the preset power supply voltage value and the power supply current is greater than the preset power supply current value; the low-frequency heavy load condition that the current of the load is greater than the preset load current value, the power supply voltage is greater than the preset power supply voltage value and the power supply current is less than the preset power supply current value; the heavy load condition that the current of the load is greater than the preset load current value, the power supply voltage is less than the preset power supply voltage value and the power supply current is greater than the preset power supply current value; the normal state that the current of the load is less than the preset load current value, the power supply voltage is less than the preset power supply voltage value and the power supply current is greater than the preset power supply current value; and the low-frequency heavy load condition that the current of the load is greater than the preset load current value, the power supply voltage is less than the preset power supply voltage value and the power supply current is less than the preset power supply current value. Heavy load generally refers to the case that when the load connected to the rear end of the air conditioner is small, the current flowing through the load is large, the power consumed is large, and the conversion efficiency is relatively high at this time. In the heavy load state, the conversion efficiency of the air conditioner is high, because the main power consumption is on the load at the rear end, and the utilization rate of the power supply is high. Light load generally refers to the case that when the connected load is large, the current flowing through the load is small, the power consumption is small, the conversion efficiency is low, and the main power consumption is in the front end. In the light load state, the conversion efficiency is low, the main power consumption is in the front end, and the utilization rate of the power supply is low.

[0066] The embodiment integrates the heavy load conditions that have a greater impact on the first rectifier bridge according to the overload conditions of the rear-end load, and uses the output voltage of the second rectifier bridge as the target voltage participating in power processing in such conditions, thereby effectively improving the accuracy of power calculation.

[0067] The utility model embodiment sets up the method of the voltage dividing circuit, and the circuit is divided into the power factor correction circuit and the voltage dividing circuit;The voltage dividing circuit can guarantee that in the overload condition of the load is complex, leads to the input voltage and input current of power factor correction circuit sampling is not accurate, the actual input voltage and current can be accurately obtained from the voltage dividing circuit, the accuracy of power calculation is improved, and the processor can select the corresponding target voltage flexibly according to the load condition, compared with the power calculation mode of prior art, the utility model embodiment is helpful to improve the accuracy of power calculation.Each embodiment in the specification is described in a progressive manner, and each embodiment mainly explains the difference from other embodiments, and the same or similar parts between each embodiment can be referred to.

[0068] The utility model embodiment is described with reference to the flow chart and / or block diagram of the method, terminal device (system) and processor program product according to the utility model embodiment. It should be understood that each flow and / or block in the flow chart and / or block diagram and the combination of the flow and / or block in the flow chart and / or block diagram can be realized by processor program instruction. These processor program instructions can be provided to the processor of general-purpose processor, special-purpose processor, embedded processor or other programmable data processing terminal device to generate a machine, so that the instruction executed by the processor of processor or other programmable data processing terminal device generates a machine for realizing the function specified in the flow Figure 1 The function specified in one flow or multiple flows and / or blocks Figure 1 The device of the function specified in one block or multiple blocks.

[0069] Although the preferred embodiments of the utility model embodiment have been described, those skilled in the art can make additional changes and modifications to these embodiments once the basic creative concept is known. Therefore, the appended claims are intended to include the preferred embodiments and all changes and modifications falling within the scope of the utility model embodiment.

[0070] In another aspect, the utility model embodiment also provides an air conditioner, including any one circuit described in the above embodiment, to avoid repetition, here will not repeat.

[0071] Finally, it needs to be pointed out that in this paper, such as the first and second relationship terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "includes", "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or terminal device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of other identical elements in the process, method, article or terminal device including the element.

[0072] The above provides a detailed introduction to the circuit and air conditioner of the utility model, the principle and implementation mode of the utility model are described in this paper by applying specific examples, the above embodiment is only used to help understand the method and core idea of the utility model; at the same time, for the general technical personnel in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed, and the above is not understood as the limitation of the utility model.

Claims

1. A circuit, characterized in that, The circuit includes: A power factor correction circuit is connected to a power supply; the power factor correction circuit includes a first rectifier bridge and a power factor corrector; the first rectifier bridge is used to receive the AC power output from the power supply and convert the AC power into DC power; A load, connected to the power factor correction circuit, is used to receive the DC power output from the power factor correction circuit; A voltage divider circuit is connected in parallel with the power factor correction circuit; the voltage divider circuit includes a second rectifier bridge for receiving the AC power output from the power supply and converting the AC power into DC power. The processor is configured to acquire the output voltage of the first rectifier bridge, the output voltage of the second rectifier bridge, the current of the load, and the power supply voltage and current of the power source; based on the current of the load and the power supply voltage and current of the power source, use the output voltage of the first rectifier bridge or the output voltage of the second rectifier bridge as a target voltage; and determine the power of the load based on the target voltage.

2. The circuit according to claim 1, characterized in that, The processor is configured to use the output voltage of the first rectifier bridge or the output voltage of the second rectifier bridge as the target voltage based on the comparison results of the load current with the preset load current value, the power supply voltage with the preset power supply voltage value, and the power supply current with the preset power supply current value.

3. The circuit according to claim 2, characterized in that, The processor is configured to select the output voltage of the first rectifier bridge as the target processing voltage when the load current is less than a preset load current value, the power supply voltage is less than a preset power supply voltage value, and the power supply current is less than a preset power supply current value.

4. The circuit according to claim 2, characterized in that, The processor is configured to adjust the duty cycle of the pulse modulation signal for the power factor corrector to increase the output voltage of the first rectifier bridge when the load current is less than a preset load current value, the power supply voltage is greater than a preset power supply voltage value, and the power supply current is less than a preset power supply current value. The output voltage of the first rectifier bridge is then used as the target voltage after the voltage is increased.

5. The circuit according to claim 2, characterized in that, The processor is used to select the output voltage of the second rectifier bridge as the target processing voltage when the current of the load is greater than a preset load current value, the power supply voltage is greater than a preset power supply voltage value, and the power supply current is greater than a preset power supply current value. When the load current is less than the preset load current value, the power supply voltage is greater than the preset power supply voltage value, and the power supply current is greater than the preset power supply current value, the output voltage of the second rectifier bridge is selected as the target processing voltage. When the load current is greater than the preset load current value, the power supply voltage is greater than the preset power supply voltage value, and the power supply current is less than the preset power supply current value, the output voltage of the second rectifier bridge is selected as the target processing voltage. When the load current is greater than the preset load current value, the power supply voltage is less than the preset power supply voltage value, and the power supply current is greater than the preset power supply current value, the output voltage of the second rectifier bridge is selected as the target processing voltage. When the load current is less than the preset load current value, the power supply voltage is less than the preset power supply voltage value, and the power supply current is greater than the preset power supply current value, the output voltage of the second rectifier bridge is selected as the target processing voltage. When the load current is greater than the preset load current value, the power supply voltage is less than the preset power supply voltage value, and the power supply current is less than the preset power supply current value, the output voltage of the second rectifier bridge is selected as the target processing voltage.

6. The circuit according to claim 1, characterized in that, The power factor correction circuit further includes a first sampling module, one end of which is connected to the first rectifier bridge and the other end is grounded, for collecting the output voltage of the first rectifier bridge.

7. The circuit according to claim 1, characterized in that, The voltage divider circuit also includes a second sampling module, one end of which is connected to the second rectifier bridge and the other end is grounded, for collecting the output voltage of the second rectifier bridge.

8. The circuit according to claim 1, characterized in that, The circuit also includes a third sampling module, which is connected in parallel with the power supply and is used to collect the input voltage and input current of the power supply.

9. The circuit according to claim 1, characterized in that, The circuit also includes a fourth sampling module, one end of which is connected to the load and the other end is grounded, for collecting the current of the load.

10. An air conditioner, characterized in that, Includes the circuit described in any one of claims 1-9.

Images