Air conditioner control circuit and control method

Abstract

The invention provides an air conditioner control circuit and method. The air conditioner control circuit comprises a power filter circuit, a PFC circuit, a display lamp panel power circuit, a third control circuit, a master control load circuit, a first rectifier bridge BG1 and a second rectifier bridge BG2. Wherein the power supply filter circuit comprises a first control circuit and a second control circuit, the second control circuit is electrically connected to the input side of the second rectifier bridge BG2, the power supply filter circuit is connected with the PFC circuit through the first rectifier bridge BG1, and the power supply filter circuit is connected with the display lamp panel power supply circuit through the second rectifier bridge BG2; the third control circuit is electrically connected to the input side of the main control load circuit; the third control circuit is in signal connection with the display lamp panel power supply circuit; the master control load circuit supplies power to the first control circuit and the second control circuit. The problems that standby energy consumption is reduced by reducing the capacitance value of an X capacitor, EMC needs to be optimized and matched by optimizing an inductor or adding a magnetic ring, EMC optimization is large in workload and inconvenient, and cost is high are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioner control, and more specifically, to an air conditioner control circuit and a control method. Background Art

[0002] With the development of variable-frequency mobile air conditioners, due to their advantages such as good comfort and convenient movement, variable-frequency mobile air conditioners have gradually gained market favor. In view of the requirement for standby power consumption, variable-frequency mobile air conditioners often reduce the capacitance value of the X capacitor and increase the discharge resistor to further reduce the standby power consumption. Due to the reduction of the capacitance value of the X capacitor, EMC needs to be optimized and matched by optimizing the inductor or adding a magnetic ring, which makes the EMC optimization workload large, inconvenient, and costly. Summary of the Invention

[0003] The problem solved by the present invention is that by reducing the capacitance value of the X capacitor to reduce the standby energy consumption, EMC needs to be optimized and matched by optimizing the inductor or adding a magnetic ring, which makes the EMC optimization workload large, inconvenient, and costly.

[0004] To solve the above problems, the present invention provides an air conditioner control circuit, which includes: a power filter circuit, a PFC circuit, a display lamp board power supply circuit, a third control circuit, a main control load circuit, a first rectifier bridge BG1, and a second rectifier bridge BG2; wherein, the power filter circuit includes a first control circuit and a second control circuit connected in parallel with the AC power supply, the first rectifier bridge BG1 is connected in parallel between the first control circuit and the second control circuit, the second control circuit is electrically connected to the input side of the second rectifier bridge BG2, the power filter circuit is connected to the PFC circuit through the first rectifier bridge BG1, and the power filter circuit is connected to the display lamp board power supply circuit through the second rectifier bridge BG2; the third control circuit is electrically connected to the input side of the main control load circuit; the third control circuit is signal-connected to the display lamp board power supply circuit; the main control load circuit supplies power to the first control circuit and the second control circuit to control the on / off of the first control circuit and the second control circuit.

[0005] The technical effect achieved by adopting this technical solution: When the air conditioner is in standby, the display lamp board power supply circuit can send the signal to the third control circuit, so that the third control circuit cuts off the power supply to the main control load circuit. Therefore, both the first control circuit and the second control circuit are disconnected, saving the power consumption of the discharge resistors in the first control circuit and the second control circuit. At this time, the power consumption of the air conditioner is mainly generated by the switching power supply and the display lamp board power supply circuit. Therefore, it is more convenient to reduce the standby power consumption of the air conditioner without reducing the capacitance value of the X capacitor, optimizing the inductor or adding a magnetic ring, and the cost is lower.

[0006] Further, the first control circuit includes: a first relay, a discharge resistor, and a first capacitor. The first relay and the first capacitor are connected in series, and the discharge resistor is connected in parallel with the first capacitor. Among them, the first relay includes a first switch and a first electromagnet, and the first electromagnet is powered by the main control load circuit, and the first electromagnet controls the on / off of the first switch.

[0007] The technical effects achieved by adopting this technical solution: In the first control circuit, the first capacitor is an X capacitor, which supplies power to the discharge resistor. When the main control load circuit stops supplying power to the first electromagnet, the first switch is turned off, and at this time, the power consumption brought by the discharge resistor can be saved. At the same time, it is safer when the AC power plug is powered off.

[0008] Further, the second control circuit includes: a second relay, and the second relay includes a second electromagnet, a second switch, and a third switch. The second switch is connected in series to the L line of the AC power supply, the third switch is connected in parallel to the N line of the AC power supply, the second electromagnet is powered by the main control load circuit, and the second electromagnet controls the on / off of the second switch and the third switch.

[0009] The technical effects achieved by adopting this technical solution: When the main control load circuit stops supplying power to the second electromagnet, the second switch and the third switch are turned off simultaneously, and the N line of the AC power supply is cut off. At this time, the PFC circuit is powered off, and other circuits connected to the PFC circuit later no longer consume power. Therefore, the air conditioner is more power-saving in standby mode.

[0010] Further, the input end of the first rectifier bridge BG1 is connected in parallel to the AC power supply. The power supply filter circuit includes: a first rectifier bridge BG1 power supply capacitor, and the first rectifier bridge BG1 power supply capacitor is connected in parallel to the two input ends of the first rectifier bridge BG1.

[0011] The technical effects achieved by adopting this technical solution: The first rectifier bridge BG1 draws power from the first rectifier bridge BG1 power supply capacitor, which can effectively reduce the interference caused by the switching of the AC power supply.

[0012] Further, the input end of the second rectifier bridge BG2 is connected in parallel to the AC power supply. The power supply filter circuit includes: a second rectifier bridge BG2 power supply capacitor, and the second rectifier bridge BG2 power supply capacitor is connected in parallel to the two input ends of the second rectifier bridge BG2. Among them, the second rectifier bridge BG2 power supply capacitor is located on the output side of the second control circuit.

[0013] The technical effects achieved by adopting this technical solution: The second rectifier bridge BG2 draws power from the second rectifier bridge BG2 power supply capacitor, which can effectively reduce the interference caused by the switching of the AC power supply and the on / off of the second control circuit.

[0014] Furthermore, the air conditioner control circuit further includes: an inverter circuit; wherein, two output terminals of the second rectifier bridge BG2 are electrically connected to both ends of the PFC circuit, and the inverter circuit is electrically connected to the output terminal of the PFC circuit.

[0015] The technical effects achieved by adopting this technical solution: The PFC circuit boosts the output voltage of the second rectifier bridge BG2 for use by the subsequent inverter circuit; the inverter circuit converts direct current into alternating current for the convenience of various components of the air conditioner, such as: the indoor intake fan motor, the outdoor exhaust fan motor or the compressor, which is not limited here; when the air conditioner is in standby, the second control circuit is cut off, and the inverter circuit and the corresponding subsequent circuits are powered off, without power consumption, so it is more power-saving.

[0016] Furthermore, the air conditioner control circuit further includes: a voltage detection circuit, the voltage detection includes a first control circuit and a second control circuit, the first control circuit is connected to the positive electrode of the input side of the PFC circuit, and the second control circuit is connected to the positive electrode of the output side of the PFC circuit.

[0017] The technical effects achieved by adopting this technical solution: The voltage detection circuit detects the output voltage of the second rectifier bridge BG2 through the first control circuit, and the voltage detection circuit detects the amplified voltage of the PFC circuit through the second control circuit to facilitate the monitoring of the operation of the PFC circuit; when the air conditioner is in standby, the second control circuit is cut off, and the voltage detection circuit is also powered off, without power consumption, so it is more power-saving.

[0018] Furthermore, the air conditioner control circuit further includes: a main control load power supply circuit and a power conversion switch; the output terminal of the first rectifier bridge BG1 is connected to the positive input terminal of the power conversion switch, and the output terminal of the power conversion switch is respectively connected to the main control load power supply circuit and the display panel power supply circuit; wherein, the main control load power supply circuit supplies power to the main control load circuit through the third control circuit.

[0019] The technical effects achieved by adopting this technical solution: The first rectifier bridge BG1 supplies power to both the main control load power supply circuit and the display panel power supply circuit through the power conversion switch. When the air conditioner is in standby or turned off, the power conversion switch closes the main control load power supply circuit and switches to the display panel power supply circuit, so that the main control load power supply circuit does not consume energy; at the same time, the third control circuit disconnects the main control load power supply circuit, cuts off the power supply of the main control load circuit, and the first control circuit and the second control circuit lose power and are disconnected.

[0020] Further, the air conditioner control circuit further includes: a display lamp board control chip, which is signal-connected to the display lamp board power supply circuit. The display lamp board control chip is configured to send an electrical signal to the third control circuit, and the third control circuit conducts or disconnects according to the electrical signal sent by the third control circuit.

[0021] The technical effects achieved after adopting this technical solution: The display lamp board control chip sends a high-level or low-level electrical signal to the third control circuit according to the signal of the display lamp board power supply circuit. The third control circuit controls the connection or disconnection between it and the main control load power supply circuit according to the high level or low level. Therefore, the display lamp board control chip can accurately and quickly switch the on and off of the main control load power supply.

[0022] The present invention also provides an air conditioner control method, which is implemented by any of the above air conditioner control circuits. The air conditioner control method includes: when the air conditioner is in standby or shutdown, the third control circuit is disconnected, and the main control load circuit stops supplying power to the first control circuit and the second control circuit; when the air conditioner is turned on, the third control circuit is conducted, and the main control load circuit supplies power to the first control circuit and the second control circuit.

[0023] The technical effects achieved after adopting this technical solution: When the air conditioner control circuit runs this air conditioner control method, it can achieve one or more of the above technical effects.

[0024] In summary, each of the above technical solutions of the present application may have one or more of the following advantages or beneficial effects: i) When the air conditioner is in standby, the display lamp board power supply circuit can send this signal to the third control circuit, so that the third control circuit cuts off the power supply to the main control load circuit. Therefore, both the first control circuit and the second control circuit are disconnected, saving the power consumption of the discharge resistors in the first control circuit and the second control circuit. At this time, the air conditioner mainly consumes power from the switching power supply and the display lamp board power supply circuit. Therefore, it is more convenient to reduce the standby power consumption of the air conditioner without reducing the capacitance value of the X capacitor, optimizing the inductor or adding a magnetic ring, and the cost is lower; ii) In the first control circuit, the first capacitor is an X capacitor and supplies power to the discharge resistor; when the main control load circuit stops supplying power to the first electromagnet, the first switch is disconnected, and at this time, the power consumption brought by the discharge resistor can be saved; ii) The first rectifier bridge BG1 takes power from the power supply capacitor of the first rectifier bridge BG1, which can effectively reduce the interference caused by the switching of the AC power supply. The second rectifier bridge BG2 takes power from the power supply capacitor of the second rectifier bridge BG2, which can effectively reduce the interference caused by the switching of the AC power supply and the on and off of the second control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of an air conditioner control circuit provided by an embodiment of the present invention;

[0026] Figure 2 is Figure 1 a schematic diagram of the specific structure of the air conditioner control circuit;

[0027] Figure 3 is Figure 1 a schematic diagram of the structure of the third control circuit and the main control load circuit in

[0028] Description of the reference numerals:

[0029] 100 - air conditioner control circuit; 111 - power supply filter circuit; 111a - first control circuit; 111b - second control circuit; 112 - PFC circuit; 113 - main control load circuit; 114 - display lamp board power supply circuit; 115 - main control load power supply circuit; 116 - voltage detection circuit; 117 - inverter circuit; 118 - third control circuit; BG1 - first rectifier bridge; BG2 - second rectifier bridge. Specific embodiments

[0030] The object of the present invention is to provide an air conditioner control circuit for achieving the effects of reducing the standby power consumption of the air conditioner and saving costs.

[0031] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings.

[0032] Refer to Figures 1-3 , an embodiment of the present invention provides an air conditioner control circuit 100, and the air conditioner control circuit 100 includes: a power supply filter circuit 111, a PFC circuit 112, a display lamp board power supply circuit 114, a third control circuit 118, a main control load circuit 113, a first rectifier bridge BG1 and a second rectifier bridge BG2; wherein, the power supply filter circuit 111 includes a first control circuit 111a and a second control circuit 111b connected in parallel with the AC power supply, the first rectifier bridge BG1 is connected in parallel between the first control circuit 111a and the second control circuit 111b, the second control circuit 111b is electrically connected to the input side of the second rectifier bridge BG2, the power supply filter circuit 111 is connected to the PFC circuit 112 through the first rectifier bridge BG1, the power supply filter circuit 111 is connected to the display lamp board power supply circuit 114 through the second rectifier bridge BG2; the third control circuit 118 is electrically connected to the input side of the main control load circuit 113; the third control circuit 118 is signal - connected to the display lamp board power supply circuit 114; the main control load circuit 113 supplies power to the first control circuit 111a and the second control circuit 111b to control the on - off of the first control circuit 111a and the second control circuit 111b.

[0033] In this embodiment, when the air conditioner is in standby, the display lamp board power supply circuit 114 can send this signal to the third control circuit 118, so that the third control circuit 118 cuts off the power supply to the main control load circuit 113. For example, the first control circuit 111a and the second control circuit 111b are controlled by the 12V voltage of the main control load circuit 113. When the main control load circuit 113 is disconnected, both the first control circuit 111a and the second control circuit 111b are disconnected, saving the power consumption of the discharge resistors in the first control circuit 111a and the second control circuit 111b. At this time, the air conditioner mainly consumes power by the switching power supply and the display lamp board power supply circuit 114. Therefore, it is more convenient to reduce the standby power consumption of the air conditioner. Through the separation control of the strong and weak electrical loads, while saving the power consumption of the discharge resistors, the easy optimization of EMC is ensured, and the cost of EMC components can be optimized.

[0034] In a specific embodiment, the first control circuit 111a includes: a first relay RY1, a discharge resistor, and a first capacitor CRV1. The first relay RY1 and the first capacitor CRV1 are connected in series, and the discharge resistor is connected in parallel with the first capacitor CRV1. Among them, the first relay RY1 includes a first switch and a first electromagnet. The first electromagnet is powered by the main control load circuit 113, and the first electromagnet controls the on / off of the first switch.

[0035] It should be noted that in the first control circuit 111a, the first capacitor CRV1 is an X capacitor, which supplies power to the discharge resistor. When the main control load circuit 113 stops supplying power to the first electromagnet, the first switch is disconnected, and at this time, the power consumption brought by the discharge resistor can be saved. At the same time, it is safer when the AC power plug is powered off.

[0036] In a specific embodiment, the second control circuit 111b includes: a second relay RY2. The second relay RY2 includes a second electromagnet, a second switch, and a third switch. The second switch is connected in series to the L line of the AC power supply, and the third switch is connected in parallel to the N line of the AC power supply. The second electromagnet is powered by the main control load circuit 113, and the second electromagnet controls the on / off of the second switch and the third switch.

[0037] It should be noted that when the main control load circuit 113 stops supplying power to the second electromagnet, the second switch and the third switch are both disconnected, and the N line of the AC power supply is cut off. At this time, the PFC circuit 112 is powered off, and the other circuits connected to the PFC circuit 112 no longer consume power. Therefore, the air conditioner is more power-saving when in standby.

[0038] In a specific embodiment, the input end of the first rectifier bridge BG1 is connected in parallel to the AC power supply; the power supply filter circuit 111 includes: a power supply capacitor for the first rectifier bridge BG1, and the power supply capacitor for the first rectifier bridge BG1 is connected in parallel to the two input ends of the first rectifier bridge BG1.

[0039] It should be noted that the first rectifier bridge BG1 draws power from the power supply capacitor of the first rectifier bridge BG1, which can effectively reduce the interference caused by the switching of the AC power supply.

[0040] Preferably, the power supply capacitor of the first rectifier bridge BG1 includes capacitor CRV5 and capacitor CRV6. Among them, the ground is connected between capacitor CRV5 and capacitor CRV6.

[0041] Preferably, capacitors CRV2, CRV3 and air-core inductor IND1 are further provided after the first control circuit 111a. Capacitors CRV2 and CRV3 are connected in series, and the air-core inductor IND1 is located between the N line and the L line of the AC power supply.

[0042] Furthermore, the ground is connected between capacitors CRV2 and CRV3, and capacitor CRV4 is provided on this ground wire.

[0043] Preferably, capacitors CRV2, CRV3, CRV4, CRV5 and CRV6 are X capacitors.

[0044] In a specific embodiment, the input end of the second rectifier bridge BG2 is connected in parallel to the AC power supply; the power supply filter circuit 111 includes: the power supply capacitor CRV7 of the second rectifier bridge BG2, and the power supply capacitor CRV7 of the second rectifier bridge BG2 is connected in parallel with the two input ends of the second rectifier bridge BG2; among them, the power supply capacitor CRV7 of the second rectifier bridge BG2 is located on the output side of the second control circuit 111b.

[0045] It should be noted that the second rectifier bridge BG2 draws power from the power supply capacitor CRV7 of the second rectifier bridge BG2, which can effectively reduce the interference caused by the switching of the AC power supply and the on-off of the second control circuit 111b. Preferably, the power supply capacitor CRV7 of the second rectifier bridge BG2 is, for example, an X capacitor.

[0046] In a specific embodiment, the air conditioner control circuit 100 further includes: an inverter circuit 117; among them, both ends of the PFC circuit 112 are electrically connected to the two output ends of the second rectifier bridge BG2, and the inverter circuit 117 is electrically connected to the output end of the PFC circuit 112.

[0047] It should be noted that the PFC circuit 112 boosts the output voltage of the second rectifier bridge BG2 for the use of the subsequent inverter circuit 117; the inverter circuit 117 converts direct current into alternating current for the use of each component of the air conditioner, such as: the indoor air intake motor, the outdoor air exhaust motor or the compressor, which is not limited here; when the air conditioner is in standby, the second control circuit 111b is cut off, and the inverter circuit 117 and the corresponding subsequent circuits are all powered off, and no power consumption will be generated, so it is more power-saving.

[0048] Preferably, the positive pole of the output terminal of the second rectifier bridge BG2 is connected to the inverter circuit 117 through an inductor L1 and a diode D3, and the negative pole of the output terminal of the second rectifier bridge BG2 is grounded.

[0049] In a specific embodiment, the air conditioner control circuit 100 further includes: a voltage detection circuit 116. The voltage detection includes a first control circuit 111a and a second control circuit 111b. The first control circuit 111a is connected to the positive pole of the input side of the PFC circuit 112, and the second control circuit 111b is connected to the positive pole of the output side of the PFC circuit 112.

[0050] It should be noted that the voltage detection circuit 116 detects the output voltage of the second rectifier bridge BG2 through the first control circuit 111a, and the voltage detection circuit 116 detects the voltage amplified by the PFC circuit 112 through the second control circuit 111b, so as to monitor the operation of the PFC circuit 112; when the air conditioner is in standby, the second control circuit 111b is cut off, and the voltage detection circuit 116 is also powered off, without power consumption, so it is more power-saving.

[0051] Preferably, the first control circuit 111a is used to detect the AC voltage, and the second control circuit 111b is used to detect the DC voltage.

[0052] Preferably, the voltage detection circuit 116 is powered by the main control load circuit 113 at 3.3V.

[0053] In a specific embodiment, the air conditioner control circuit 100 further includes: a main control load power supply circuit 115 and a power conversion switch; the output terminal of the first rectifier bridge BG1 is connected to the positive pole of the input terminal of the power conversion switch, and the output terminal of the power conversion switch is respectively connected to the main control load power supply circuit 115 and the display lamp board power supply circuit 114; wherein, the main control load power supply circuit 115 supplies power to the main control load circuit 113 through a third control circuit 118.

[0054] It should be noted that the first rectifier bridge BG1 supplies power to both the main control load power supply circuit 115 and the display lamp board power supply circuit 114 through the power conversion switch. When the air conditioner is in standby or shutdown, the power conversion switch turns off the main control load power supply circuit 115 and switches to the display lamp board power supply circuit 114, so that the main control load power supply circuit 115 does not consume energy; at the same time, the third control circuit 118 disconnects the main control load power supply circuit 115, cuts off the power supply of the main control load circuit 113, and the first control circuit 111a and the second control circuit 111b lose power and are disconnected.

[0055] Preferably, between the two output terminals of the first rectifier bridge BG1, a capacitor CRV8 is connected, and the inductor CRV8 is a DC film capacitor.

[0056] Preferably, the main control load power supply circuit 115 outputs 15V-1, and the third control circuit 118 receives 15V-1 for use by the main control load circuit 113.

[0057] Furthermore, the main control load power supply circuit 115 also has a dummy load R13, and R13 is connected in parallel between 15V-1 and the ground terminal. On the premise of meeting the working conditions of the switching power supply, increasing the resistance value of R13 as much as possible can further reduce the power consumption brought by the air conditioner during standby.

[0058] In a specific embodiment, the air conditioner control circuit 100 further includes: a display lamp board control chip, which is signal-connected to the display lamp board power supply circuit 114. The display lamp board control chip is used to send an electrical signal to the third control circuit 118, and the third control circuit 118 conducts or disconnects according to the electrical signal sent by the third control circuit 118.

[0059] It should be noted that the display lamp board control chip sends a high-level or low-level electrical signal to the third control circuit 118 according to the signal of the display lamp board power supply circuit 114. The third control circuit 118 controls its connection or disconnection with the main control load power supply circuit 115 according to the high level or low level. Therefore, the display lamp board control chip can accurately and quickly switch the on and off of the main control load power supply.

[0060] In a specific embodiment, the third control circuit 118 includes a BM1 module, a triode Q1, an optocoupler PC2, a triode Q2, and a PMOS transistor MOS1. Among them, the optocoupler PC2 has an optocoupler diode and an optocoupler triode. The BM1 module is connected between the display lamp board control chip and the base of the triode Q1. The collector of the triode Q1 is connected to the negative electrode of the optocoupler diode. The positive electrode of the optocoupler diode is connected to the display lamp board power supply circuit 114. The emitter of the optocoupler triode is connected to the collector of the triode Q2. The collector of the optocoupler triode is connected to 15V-1. The collector of the triode Q2 is connected to the PMOS transistor MOS1.

[0061] It should be noted that when the air conditioner is in standby or shutdown, the display lamp board control chip outputs a low level through BM1, and the triode Q1, the optocoupler PC2, the triode Q2, and the PMOS transistor MOS1 are turned off. There is no output of 15V, 12V, and 3.3V in the main control load circuit 113. Since there is no 12V output, the first control circuit 111a and the second control circuit 111b are disconnected. At this time, the power consumption of the air conditioner is mainly generated by the switching power supply and the display lamp board power supply circuit 114; when the air conditioner is turned on, the display lamp board control chip outputs a high level through BM1, and the triode Q1, the optocoupler PC2, the triode Q2, and the PMOS transistor MOS1 are turned on. The main control load circuit 113 outputs 15V, 12V, and 3.3V, and at the same time, the first control circuit 111a and the second control circuit 111b are turned on.

[0062] The present invention further provides an air conditioner control method, which is implemented by any one of the above air conditioner control circuits 100. The air conditioner control method includes: when the air conditioner is in standby or shutdown, the third control circuit 118 is disconnected, and the main control load circuit 113 stops supplying power to the first control circuit 111a and the second control circuit 111b; when the air conditioner is turned on, the third control circuit 118 is turned on, and the main control load circuit 113 supplies power to the first control circuit 111a and the second control circuit 111b.

[0063] It should be noted that when the air conditioner control circuit 100 runs this air conditioner control method, the above one or more technical effects can be achieved.

[0064] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. An air conditioner control circuit, characterized in that The air conditioner control circuit includes: a power filter circuit (111), a PFC circuit (112), a display lamp board power supply circuit (114), a third control circuit (118), a main control load circuit (113), a first rectifier bridge BG1, and a second rectifier bridge BG2; Among them, the power filter circuit (111) includes a first control circuit (111a) and a second control circuit (111b) connected in parallel with the AC power supply. The first rectifier bridge BG1 is connected in parallel between the first control circuit (111a) and the second control circuit (111b). The second control circuit (111b) is electrically connected to the input side of the second rectifier bridge BG2. The power filter circuit (111) is connected to the PFC circuit (112) through the first rectifier bridge BG1, and the power filter circuit (111) is connected to the display lamp board power supply circuit (114) through the second rectifier bridge BG2. The third control circuit (118) is electrically connected to the input side of the main control load circuit (113). The third control circuit (118) is signal-connected to the display lamp board power supply circuit (114). The main control load circuit (113) supplies power to the first control circuit (111a) and the second control circuit (111b) to control the on / off of the first control circuit (111a) and the second control circuit (111b).

2. The air conditioner control circuit according to claim 1, characterized in that, The first control circuit (111a) includes: a first relay, a discharge resistor, and a first capacitor. The first relay and the first capacitor are connected in series, and the discharge resistor is connected in parallel with the first capacitor; Among them, the first relay includes a first switch and a first electromagnet. The first electromagnet is powered by the main control load circuit (113), and the first electromagnet controls the on / off of the first switch.

3. The air conditioner control circuit according to claim 1, wherein The second control circuit (111b) includes: a second relay. The second relay includes a second electromagnet, a second switch, and a third switch. The second switch is connected in series to the L line of the AC power supply, and the third switch is connected in parallel to the N line of the AC power supply. The second electromagnet is powered by the main control load circuit (113), and the second electromagnet controls the on / off of the second switch and the third switch.

4. The air conditioner control circuit according to claim 1, characterized in that The input end of the first rectifier bridge BG1 is connected in parallel to the AC power supply; The power filter circuit (111) includes: a first rectifier bridge BG1 power supply capacitor, and the first rectifier bridge BG1 power supply capacitor is connected in parallel to the two input ends of the first rectifier bridge BG1.

5. The air conditioner control circuit according to claim 1, wherein The input end of the second rectifier bridge BG2 is connected in parallel to the AC power supply; The power filter circuit (111) includes: a second rectifier bridge BG2 power supply capacitor, and the second rectifier bridge BG2 power supply capacitor is connected in parallel to the two input ends of the second rectifier bridge BG2; among them, the second rectifier bridge BG2 power supply capacitor is located on the output side of the second control circuit (111b).

6. The air conditioner control circuit according to claim 1, characterized in that, The air conditioner control circuit further includes: an inverter circuit (117); Wherein, two output terminals of the second rectifier bridge BG2 are electrically connected to both ends of the PFC circuit (112), and the inverter circuit (117) is electrically connected to the output terminal of the PFC circuit (112).

7. The air conditioner control circuit according to claim 6, wherein The air conditioner control circuit further includes: a voltage detection circuit (116), the voltage detection includes a first control circuit (111a) and a second control circuit (111b), the first control circuit (111a) is connected to the positive pole of the input side of the PFC circuit (112), and the second control circuit (111b) is connected to the positive pole of the output side of the PFC circuit (112).

8. The air conditioner control circuit according to claim 1, wherein The air conditioner control circuit further includes: a main control load power supply circuit (115) and a power conversion switch; the output terminal of the first rectifier bridge BG1 is connected to the positive pole of the input end of the power conversion switch, and the output terminal of the power conversion switch is respectively connected to the main control load power supply circuit (115) and the display lamp board power supply circuit (114); Wherein, the main control load power supply circuit (115) supplies power to the main control load circuit (113) through the third control circuit (118).

9. The air conditioner control circuit according to claim 1, wherein, The air conditioner control circuit further includes: A display lamp board control chip, the display lamp board control chip is signal-connected to the display lamp board power supply circuit (114), the display lamp board control chip is used to send an electrical signal to the third control circuit (118), and the third control circuit (118) conducts or disconnects according to the electrical signal sent by the third control circuit (118).

10. An air conditioner control method, characterized in that, The air conditioner control method is implemented by the air conditioner control circuit according to any one of claims 1-9, and the air conditioner control method includes: When the air conditioner is in standby or shutdown, the third control circuit (118) is disconnected, and the main control load circuit (113) stops supplying power to the first control circuit (111a) and the second control circuit (111b); When the air conditioner is turned on, the third control circuit (118) is turned on, and the main control load circuit (113) supplies power to the first control circuit (111a) and the second control circuit (111b).

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