Air conditioner

Abstract

The utility model provides a kind of air conditioner, air conditioner includes: power supply circuit, first end connects fire line, fifth end connects zero line;Control chip circuit, first end connects the second end of power supply circuit;Low-power circuit, first end connects the second end of power supply circuit or the first end of control chip circuit, third end ground, seventh end connects the third end of power supply circuit or the seventh end of control chip circuit;Feedback circuit, first end connects the fourth end of power supply circuit, second end connects the fifth end of low-power circuit.The utility model is based on above-mentioned connection, only by the sixth end of control chip circuit and output to low-power circuit in level control signal, combine direct current power supply signal, output standby after voltage of voltage drop direct current power supply signal guaranteeing that air conditioner is needed, and / or output switch tube control signal disconnects the power supply to the load without needing electricity, to save the standby power consumption of air conditioner, guarantee the stability of air conditioner electricity by feedback circuit.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and in particular to an air conditioner. Background Technology

[0002] In related technologies, the controller chip and its peripheral circuits of air conditioners require low-voltage DC power. Typically, the power supply is rectified from AC input voltage to DC voltage and then stepped down by a switching power supply to the required low-voltage DC (usually 5V or 3.3V) to supply the controller chip and its peripheral circuits.

[0003] However, when the control chip and its surrounding circuits of the air conditioner are powered in the above way, the higher the voltage, the higher the power consumption when the load is fixed. In the above method, the switching power supply outputs a stable 5V or 3.3V power regardless of whether the air conditioner is in standby or running state, and all control circuits are powered at the same time, which is not conducive to reducing the standby power consumption of the air conditioner. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] Therefore, one objective of this utility model is to provide an air conditioner that reduces standby power consumption during standby.

[0006] To achieve the above objectives, a first aspect of this utility model provides an air conditioner comprising: a power supply circuit, wherein a first terminal of the power supply circuit is connected to a live wire, and a fifth terminal of the power supply circuit is connected to a neutral wire, for receiving an AC power signal and outputting a DC power supply signal; a control chip circuit, wherein a first terminal of the control chip circuit is connected to a second terminal of the power supply circuit, for receiving the DC power supply and outputting a level control signal; a low-power circuit, wherein a first terminal of the low-power circuit is connected to either the second terminal of the power supply circuit or the first terminal of the control chip circuit, a third terminal of the low-power circuit is grounded, a seventh terminal of the low-power circuit is connected to either the third terminal of the power supply circuit or the seventh terminal of the control chip circuit, and an eighth terminal of the low-power circuit is connected to the sixth terminal of the control chip circuit, for receiving the level control signal, outputting a standby DC power supply signal or a DC power supply signal, and / or outputting a switching transistor control signal; and a feedback circuit, wherein a first terminal of the feedback circuit is connected to a fourth terminal of the power supply circuit, and a second terminal of the feedback circuit is connected to the fifth terminal of the low-power circuit, for receiving the standby DC power supply signal or the DC power supply signal and outputting a power supply control signal for the power supply circuit.

[0007] According to the embodiment of this utility model, the air conditioner, based on the connection relationship between the power supply circuit, the control chip circuit, the low-power circuit, and the feedback circuit, supplies power to the air conditioner by outputting a DC power supply signal through the power supply circuit. The control chip circuit outputs a level control signal to the low-power circuit only through its sixth terminal. The low-power circuit combines the level control signal and the DC power supply signal. When the air conditioner is in standby mode, it outputs a stepped-down standby DC power supply signal to ensure the voltage required for standby, and / or outputs a switching transistor control signal to disconnect power to loads that do not require power, thus saving standby power consumption. When the air conditioner is in operating mode, it outputs a DC power supply signal to ensure the voltage required for operation, and / or outputs a switching transistor control signal to supply power to the load. It also outputs the standby DC power supply signal or a corresponding feedback signal from the DC power supply signal to the feedback circuit. The feedback circuit judges the feedback signal and outputs a power supply control signal to the power supply circuit to maintain a stable voltage at the voltage required by the air conditioner. This ensures the stability of the air conditioner's power supply and controls the voltage output by the power supply circuit during standby within the minimum operating voltage range of the chip circuit, effectively reducing the standby power consumption of the air conditioner.

[0008] In some embodiments, the low-power circuit includes: a switching transistor control circuit, wherein the first and fifth terminals of the switching transistor control circuit are connected to the first terminal of the control chip circuit, the third terminal of the switching transistor control circuit is grounded, and the sixth terminal of the switching transistor control circuit is connected to the sixth terminal of the control chip circuit, for receiving the level control signal and outputting a switching transistor control signal; and a voltage divider output unit, wherein the first terminal of the voltage divider output unit is connected to the second terminal of the feedback circuit, the second terminal of the voltage divider output unit is connected to the first terminal of the control chip circuit, and the third terminal of the voltage divider output unit is grounded, for receiving the switching transistor control signal and outputting the standby DC power supply signal or the DC power supply signal.

[0009] In some embodiments, the switching transistor control circuit includes: a first switching transistor control sub-circuit, wherein a first terminal of the first switching transistor control sub-circuit is connected to a second terminal of the voltage divider output unit, and a second terminal of the first switching transistor control sub-circuit is connected to a sixth terminal of the control chip circuit, for receiving a level control signal to turn on or off; a second switching transistor control sub-circuit, wherein a first terminal of the second switching transistor control sub-circuit is connected to a third terminal of the first switching transistor control sub-circuit, for receiving a level control signal to turn on or off; and a third switching transistor control sub-circuit, wherein a first terminal of the third switching transistor control sub-circuit is connected to a first terminal of the control chip circuit, a second terminal of the third switching transistor control sub-circuit is connected to a load circuit, and a third terminal of the third switching transistor control sub-circuit is connected to a second terminal of the second switching transistor control sub-circuit, for receiving a level control signal to turn on or off. In some embodiments, the first switching transistor control sub-circuit includes: a first transistor, the emitter of which is connected to the second terminal of the voltage divider output unit, and the collector of which is connected to the third terminal of the voltage divider output unit; and a first resistor, one end of which is connected to the sixth terminal of the control chip circuit, and the other end of which is connected to the base of the first transistor.

[0010] In some embodiments, the second switching control sub-circuit includes: a second transistor, the emitter of which is grounded and the base of which is connected to the base of the first transistor; and a second resistor, one end of which is connected to the third terminal of the third switching control sub-circuit and the other end of which is connected to the collector of the second transistor.

[0011] In some embodiments, the third switching transistor control sub-circuit includes: a third transistor, the emitter of which is connected to the first terminal of the control chip circuit, and the collector of which is connected to the load circuit; and a third resistor, one end of which is connected to the emitter of the third transistor, and the other end of which is connected to the base of the third transistor.

[0012] In some embodiments, the voltage divider output unit includes: a fourth resistor, one end of which is connected to the second terminal of the power supply circuit, and the other end of which is connected to the second terminal of the feedback circuit; and a fifth resistor, one end of which is connected to the other end of the fourth resistor, and the other end of which is grounded.

[0013] In some embodiments, the air conditioner further includes: a sixth resistor, one end of which is connected to the third terminal of the first switching tube control sub-circuit, and the other end of which is connected to one end of the fifth resistor or the other end of the fourth resistor, for forming the voltage divider output unit with the fifth resistor.

[0014] In some embodiments, the power supply circuit includes: a rectifier bridge circuit, wherein the third terminal of the rectifier bridge circuit is connected to the live wire, and the second terminal of the rectifier bridge circuit is connected to the neutral wire, for receiving AC power signals and outputting rectified DC signals; and a switching power supply sub-circuit, wherein the first terminal of the switching power supply sub-circuit is connected to the first terminal of the rectifier bridge circuit, and the fifth terminal of the switching power supply sub-circuit is connected to the fourth terminal of the rectifier bridge circuit, for receiving the rectified DC signals and outputting DC power.

[0015] In some embodiments, the air conditioner further includes a capacitor, one end of which is connected to the first terminal of the rectifier bridge circuit, and the other end of which is connected to the fourth terminal of the rectifier bridge circuit, for receiving the rectified DC signal and outputting a smooth DC signal.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the refrigeration cycle system of an air conditioner according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the controller according to an embodiment of the present invention; Figure 3 This is a power control circuit diagram of an air conditioner according to an embodiment of the present invention; Figure 4 This is a low-power circuit diagram of an air conditioner according to an embodiment of the present invention; Figure 5 This is a circuit diagram of the switching tube control circuit of an air conditioner according to an embodiment of the present invention; Figure 6 This is a power supply circuit diagram of an air conditioner according to an embodiment of the present invention.

[0018] Figure label: Air conditioner 1; Power supply circuit 10; control chip circuit 11; feedback circuit 12; low power circuit 13; live wire 50; neutral wire 51; Voltage divider output unit 14; Switching transistor control circuit 15; First switch control sub-circuit 16; Second switch control sub-circuit 17; Third switch control sub-circuit 18; Load circuit 20; Switching power supply module 52; voltage feedback module 53; control chip module 54; third transistor 55; first transistor 56; second transistor 57; first resistor 58; third resistor 59; second resistor 60; fourth resistor 61; fifth resistor 62; remote control wake-up circuit 63; temperature sensor circuit 64; humidity sensor circuit 65; motor control circuit 66; sixth resistor 70; 22. Rectifier bridge circuit; 23. Switching power supply sub-circuit; 24. Capacitor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In related technologies, an AC power supply of 220V is input to a rectifier bridge, which rectifies it into DC voltage and then smooths and filters it with capacitors to form a stable DC voltage. When the AC power supply is 220V, the DC voltage is typically 220V × 1.414 ≈ 310V. This high-voltage DC voltage is converted to a low-voltage 5V DC voltage by the switching power supply module and output to the control chip module, temperature sensor circuit, humidity sensor circuit, motor control circuit, and remote control wake-up circuit. The temperature sensor circuit, humidity sensor circuit, and motor control circuit listed here are illustrative examples of peripheral circuits; actual air conditioner controllers may use different peripheral circuits depending on different load requirements. To maintain a stable output voltage of 5V, the circuit also requires a voltage feedback module. The voltage feedback module's reference voltage VREF (Voltage Reference) is 2.5V. A resistor sampling voltage divider circuit composed of two resistors feeds the output voltage value back to the voltage feedback module, which then determines whether to increase the output of the switching power supply module to ensure a stable 5V output voltage.

[0024] For example, if the resistance of one resistor R1 is 10KΩ and the resistance of the other resistor R2 is 10KΩ, then when the 5V is stable, the signal output to the voltage feedback module is: VREF=5V×R2 / (R1+R2)=2.5V. At this time, the voltage feedback module can control the switching power supply module to maintain the existing output state.

[0025] When the actual output is greater than 5V, the signal VREF output to the voltage feedback module is greater than 2.5V. The voltage feedback module judges that the output voltage is too high and controls the switching power supply module to reduce the output, so that the output voltage is reduced to 5V.

[0026] Conversely, when the actual output voltage is less than 5V, the signal RREF output to the voltage feedback module is less than 2.5V. The voltage feedback module determines that the output voltage is too low and controls the switching power supply module to increase the output, so that the output voltage rises to 5V.

[0027] However, when the control chip and its surrounding circuits of the air conditioner are powered in the above manner, the target output value of the power control circuit is fixed. Therefore, the target output voltage will not be reduced when the air conditioner is in standby mode, and the standby power consumption cannot be further reduced.

[0028] Therefore, the air conditioner using this invention, based on the connection relationship between the power supply circuit, control chip circuit, low-power circuit, and feedback circuit, supplies power to the air conditioner by outputting a DC power supply signal through the power supply circuit. The control chip circuit outputs a level control signal to the low-power circuit only through its sixth terminal. The low-power circuit combines the level control signal and the DC power supply signal. When the air conditioner is in standby mode, it outputs a stepped-down standby DC power supply signal to ensure the voltage required for standby, and / or outputs a switching transistor control signal to disconnect power to unused loads, thus saving standby power consumption. When the air conditioner is in operation, it outputs a DC power supply signal to ensure the voltage required for operation, and / or outputs a switching transistor control signal to supply power to the load. It also outputs the standby DC power supply signal or a corresponding feedback signal from the DC power supply signal to the feedback circuit. The feedback circuit judges the feedback signal and outputs a power supply control signal to the power supply circuit to maintain a stable voltage at the required voltage for the air conditioner. This ensures the stability of the air conditioner's power supply and controls the voltage output by the power supply circuit during standby within the minimum operating voltage range of the chip circuit, effectively reducing the standby power consumption of the air conditioner.

[0029] like Figure 1 As shown, one of the indoor heat exchangers and the other of the outdoor heat exchanger is a condenser, and the other is an evaporator. In this invention, the air conditioner executes a refrigeration cycle by using a compressor, a condenser, an expansion valve, an evaporator, and a four-way valve. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0030] The compressor compresses the refrigerant gas, which is in a high-temperature, high-pressure state and enters through the return pipe, and then discharges the compressed refrigerant gas through the exhaust pipe. The discharged refrigerant gas flows into the condenser through the condenser inlet pipe. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0031] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0032] The expansion valve expands the high-temperature, high-pressure liquid refrigerant, which condenses in the condenser and is discharged through the condenser outlet pipe, into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0033] In the embodiments shown in this application, the air conditioner also includes a controller 71. The controller 71 is a device that can generate operation control signals according to instruction operation codes and timing signals to instruct the air conditioner to execute control commands. For example, in response to a power-on or power-off command issued by a user, the controller 71 can perform an operation related to the object selected by the power-on or power-off command.

[0034] This application embodiment also provides a hardware structure diagram of the controller 71, such as... Figure 2 As shown, the controller 71 includes a processor 83, and optionally, a memory 82 and a communication interface 84 connected to the processor 83. The processor 83, memory 82, and communication interface 84 are connected via a bus 81.

[0035] Processor 83 can be a central processing unit (CPU), a general-purpose processor (NP), a network processor (NP), a digital signal processor (DSP), a microprocessor (Microcontroller), a programmable logic device (PLD), or any combination thereof. Processor 83 can also be any other device with processing capabilities, such as a circuit, device, or software module. Processor 83 can also include multiple CPUs, and processor 83 can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. Here, processor 83 can refer to one or more devices, circuits, or processing cores used for processing data (e.g., computer program instructions).

[0036] The memory 82 can be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, a random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. This application embodiment does not impose any limitations on this. The memory 82 can exist independently or be integrated with the processor 83. The memory 82 may contain computer program code. The processor 83 is used to execute the computer program code stored in the memory 82, thereby implementing the air conditioner control method provided in this application embodiment.

[0037] The communication interface 84 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.). The communication interface 84 can be a module, circuit, transceiver, or any device capable of communication.

[0038] Bus 81 can be a peripheral component interconnect (PCI) bus 81 or an extended industry standard architecture (EISA) bus 81, etc. Bus 81 can be divided into address bus 81, data bus 81, control bus 81, etc.

[0039] The following is combined Figures 3-6 This invention describes an air conditioner according to an embodiment of the present invention.

[0040] like Figure 3 The diagram shown is a power control circuit diagram of an air conditioner according to an embodiment of the present invention. The air conditioner 1 of this embodiment includes: The power supply circuit 10 has its first terminal connected to the live wire 50 and its fifth terminal connected to the neutral wire 51. It is used to receive AC power signals and output DC power signals.

[0041] In an embodiment, such as Figure 3 As shown, the AC power signal is an electrical signal whose current direction and magnitude change periodically with time, including AC voltage; the DC power signal is an electrical signal whose direction and magnitude do not change with time, and whose voltage / current waveform is a constant value, including DC voltage. The air conditioner requires power to maintain the voltage in the operating state, whether in standby or operating mode, and is ready to be woken up to the operating state in standby mode. Therefore, the first terminal of the power circuit 10 is connected to the live wire 50, and the fifth terminal is connected to the neutral wire 51 to receive the current and voltage from the AC power signal, such as 220V AC. The received 220V AC voltage is rectified into DC voltage by a rectifier bridge, and then smoothed and filtered by a capacitor to form a DC voltage. When AC 220V is input, the DC voltage is usually a high-voltage DC voltage of 220V × 1.414 ≈ 310V (220V × 1.414 ≈ 310V). This high-voltage DC voltage is converted into low-voltage DC voltage by the switching power supply module 52 in the power circuit 10 and output as a DC power supply signal to ensure the voltage required by the air conditioner in both operating and standby modes, ensuring the normal operation of the air conditioner.

[0042] The control chip circuit 11 has its first terminal connected to the second terminal of the power supply circuit 10, and is used to receive DC power and output level control signals.

[0043] In an embodiment, such as Figure 3 As shown, the level control signal includes a high level signal when the air conditioner is in operation and a low level signal when it is in standby mode. The low-power circuit can be controlled by the new high level control signal. The control chip circuit 11 is connected to the power supply circuit 10. The power supply circuit 10 outputs low-voltage DC power as DC power to the control chip circuit 11. The control chip circuit converts the received DC power into the level control signal required by the air conditioner in operation and standby modes, and outputs it to the low-power circuit 13 to ensure that the low-power control circuit 13 operates or standsby correctly under the level control signal.

[0044] The low-power circuit 13 has its first terminal connected to the second terminal of the power supply circuit 10 or the first terminal of the control chip circuit 11, its third terminal grounded, its seventh terminal connected to the third terminal of the power supply circuit 10 or the seventh terminal of the control chip circuit 11, and its eighth terminal connected to the sixth terminal of the control chip circuit. It is used to receive level control signals, output standby DC power supply signals or DC power supply signals, and / or output switching control signals.

[0045] In this embodiment, the standby DC power supply signal is the signal that ensures the voltage required by the air conditioner in standby mode, and the corresponding feedback signal, including the actual standby voltage and the corresponding feedback signal; the DC power supply signal is the signal that ensures the voltage required by the air conditioner in operating mode, and the corresponding feedback signal, including the actual operating voltage and the corresponding feedback signal; the switching control signal is the signal that controls the switching transistor to turn on / off. In reality, the control chip module 54 in the air conditioner's control chip circuit 11 has a wide operating voltage range. In operating mode, it requires a stable 5V voltage to accurately detect various temperature signals and control the switching of related loads. However, in standby mode, the air conditioner only needs to retain the function of receiving remote control commands and waiting to be woken up. Therefore, the control chip module 54 can operate at a lower voltage, such as 3V. Other circuit control modules do not need to be energized. The following explanations will use 3V as the voltage required by the air conditioner in standby mode as an example, and 5V as the DC voltage output by the power supply circuit 10 as an example. In actual use, adjustments can be made according to requirements and experimental calibration.

[0046] Therefore, by using the low-power circuit 13, it is possible to ensure that the air conditioner maintains a stable actual operating voltage (e.g., 5V) required for its operation, and also to ensure that the air conditioner supplies power to the load module at the required actual operating voltage (e.g., 3V) in standby mode. Furthermore, it is possible to ensure that the air conditioner provides targeted power supply according to the actual standby voltage required by the load in standby mode. For example, load circuits that do not need to be energized will not be supplied with power. Specifically: The first terminal of the low-power circuit 13 is connected to the second terminal of the power supply circuit 10 or the first terminal of the control chip circuit 11. The third terminal of the low-power circuit 13 is grounded. The seventh terminal of the low-power circuit 13 is connected to the third terminal of the power supply circuit 10 or the seventh terminal of the control chip circuit 11. The eighth terminal of the low-power circuit is connected to the sixth terminal of the control chip circuit. The actual operating voltage or actual standby voltage in the DC power supply signal output by the power supply circuit 10 is received through the first and seventh terminals of the low-power circuit 13. The level control signal output by the control chip circuit 11 is received through the eighth terminal of the low-power circuit. The level control signal includes a high level when the air conditioner is in the working state and a low level when the air conditioner is in the standby state.

[0047] Based on the DC power supply signal, level control signal, and the connection relationship between the low-power circuit 13, the control chip circuit 11, and the power supply circuit 10, the switching transistors in the low-power circuit 13 are turned on or off. This allows the air conditioner to output the actual standby voltage in the standby DC power supply signal after being stepped down by the low-power circuit 13 when in standby mode. This reduces the actual standby voltage output in standby mode from 5V to 3V, meeting the voltage requirements of the air conditioner while saving energy. The feedback signal corresponding to the actual standby voltage in the standby DC power supply signal is given to the feedback circuit 12 to prepare for stabilizing the output voltage at 3V. And / or, when the air conditioner is in standby mode, after the corresponding switching transistors are turned off by the low-power circuit 13, the output switching transistor control signal is off, and no power is supplied to the circuits in the load circuit 20 that do not need to be energized in standby mode, thereby reducing the load energy consumption of the air conditioner in standby mode.

[0048] Alternatively, when the air conditioner is in operation, the low-power circuit 13 outputs the actual operating voltage of the DC power supply signal to ensure the voltage required for the air conditioner to operate, such as 5V, and sends the feedback signal corresponding to the actual operating voltage in the DC power supply signal to the feedback circuit 12 to prepare for stabilizing the output voltage at 5V; and / or when the air conditioner is in operation, after the low-power circuit 13 turns off the corresponding switching transistor, the output switching transistor control signal is turned on to ensure power supply to the load in the load circuit 20.

[0049] Feedback circuit 12, with its first end connected to the fourth end of power supply circuit 10 and its second end connected to the fifth end of low power circuit 13, is used to receive standby DC power supply signal or DC power supply signal and output power supply control signal for power supply circuit.

[0050] In this embodiment, the power supply control signal is a signal that controls the power supply circuit 10 to adjust the output voltage, for example, increasing the output voltage, decreasing the output voltage, or maintaining the output voltage unchanged; such as... Figure 3 As shown, the first terminal of the feedback circuit 12 is connected to the fourth terminal of the power supply circuit 10. It is used to receive the feedback signal corresponding to the actual standby voltage in the standby DC power supply signal output by the low power circuit 13 or the feedback signal corresponding to the actual working voltage in the DC power supply signal. The feedback circuit 12 judges the received feedback signal and outputs a power supply control signal to the power supply circuit 10 to control the power supply circuit to adjust the output voltage so that the actual standby voltage or actual working voltage output by the low power circuit 13 is stabilized at the voltage required for the standby or working state of the air conditioner.

[0051] For example, when the air conditioner is in standby mode, the actual standby voltage output by the low-power circuit 13 is greater than 3V. Then, the corresponding feedback signal sent to the feedback circuit 12 will also be greater than the reference voltage target control value of the feedback circuit, such as 2.5V. After receiving the feedback signal, the feedback circuit 12 determines that the actual standby voltage is too high and outputs a power supply control signal to the power supply circuit 10. After receiving the power supply control signal, the power supply circuit 10 will reduce the voltage output to reduce the actual standby voltage to 3V, so that the actual standby voltage is stabilized at the 3V required for the air conditioner to standby.

[0052] For example, when the air conditioner is in standby mode, the actual standby voltage output by the low-power circuit 13 is less than 3V. Therefore, the corresponding feedback signal sent to the feedback circuit 12 will also be less than the reference voltage target control value of the feedback circuit, such as 2.5V. After receiving the feedback signal, the feedback circuit 12 determines that the actual standby voltage is too low and outputs a power supply control signal to the power supply circuit 10. After receiving the power supply control signal, the power supply circuit 10 will increase the voltage output to increase the actual standby voltage to 3V, so that the actual standby voltage is stabilized at the 3V required for the air conditioner to standby.

[0053] For example, when the air conditioner is in operation, the actual operating voltage output by the low-power circuit 13 is greater than 5V. Accordingly, a feedback signal corresponding to 5V is sent to the feedback circuit 12. After receiving the feedback signal, the feedback circuit 12 determines that the actual operating voltage is too high and outputs a power supply control signal to the power supply circuit 10. After receiving the power supply control signal, the power supply circuit 10 will reduce the voltage output to reduce the actual operating voltage to 5V, so that the actual operating voltage is stabilized at the 5V required for the air conditioner to operate.

[0054] It is understandable that when the actual standby voltage is 3V or the actual operating voltage is 5V, the feedback circuit 12, after judging according to the corresponding feedback signal, believes that the current actual standby voltage or actual operating voltage is the voltage required for the air conditioner to standby or operate, and sends the power supply control signal to the power supply circuit 10 to maintain the corresponding output voltage unchanged. After receiving the power supply control signal, the power supply circuit 10 will maintain the corresponding output voltage unchanged.

[0055] As can be seen from the above examples, assuming the operating current of the air conditioner in standby mode is 0.2A, and the actual standby voltage in the prior art is 5V, the power consumption is 5V×0.2A=1W. However, this application reduces the actual standby voltage to 3V and cuts off the power supply in the load circuit 10 that does not need to operate in standby mode, reducing the current to 0.1A. The power consumption is 3V×0.1A=0.3W, which can reduce the power consumption by 70%.

[0056] According to the embodiment of this utility model, the air conditioner, based on the connection relationship between the power supply circuit, the control chip circuit, the low-power circuit, and the feedback circuit, supplies power to the air conditioner by outputting a DC power supply signal through the power supply circuit. The control chip circuit outputs a level control signal to the low-power circuit only through its sixth terminal. The low-power circuit combines the level control signal and the DC power supply signal. When the air conditioner is in standby mode, it outputs a stepped-down standby DC power supply signal to ensure the voltage required for standby, and / or outputs a switching transistor control signal to disconnect power to loads that do not require power, thus saving standby power consumption. When the air conditioner is in operating mode, it outputs a DC power supply signal to ensure the voltage required for operation, and / or outputs a switching transistor control signal to supply power to the load. It also outputs the standby DC power supply signal or a corresponding feedback signal from the DC power supply signal to the feedback circuit. The feedback circuit judges the feedback signal and outputs a power supply control signal to the power supply circuit to maintain a stable voltage at the voltage required by the air conditioner. This ensures the stability of the air conditioner's power supply and controls the voltage output by the power supply circuit during standby within the minimum operating voltage range of the chip circuit, effectively reducing the standby power consumption of the air conditioner.

[0057] In some embodiments, such as Figure 4 The diagram shown is a low-power circuit diagram of an air conditioner according to an embodiment of this utility model. (In conjunction with...) Figure 3 and Figure 4 As shown, the low-power circuit 13 includes: a switching transistor control circuit 15, the first and fifth terminals of which are connected to the first terminal of the control chip circuit 11, the third terminal of which is grounded, and the sixth terminal of which is connected to the sixth terminal of the control chip circuit 11, for receiving level control signals and outputting switching transistor control signals; and a voltage divider output unit 14, the first terminal of which is connected to the second terminal of the feedback circuit 12, the second terminal of which is connected to the first terminal of the control chip circuit 11, and the third terminal of which is grounded, for receiving switching transistor control signals and outputting standby DC power supply signals or DC power supply signals.

[0058] In this embodiment, the standby DC power supply signal is a signal that ensures the voltage required by the air conditioner in standby mode, and the corresponding feedback signal, including the actual standby voltage and the corresponding feedback signal; the DC power supply signal is a signal that ensures the voltage required by the air conditioner in operating mode, and the corresponding feedback signal, including the actual operating voltage and the corresponding feedback signal; the level control signal includes a high level signal in operating mode and a low level signal in standby mode, and the low-power circuit can be controlled by the new high level control signal; the switching control signal is a signal that controls the switching transistor to turn on / off.

[0059] The first and fifth terminals of the switching transistor control circuit 15 are connected to the first terminal of the control chip circuit 11 to receive the DC power supply signal output by the power supply circuit 10 to the switching transistor control circuit 15, thereby ensuring the power supply of the switching transistor control circuit 15. The sixth terminal of the switching transistor control circuit 15 is connected to the sixth terminal of the control chip circuit 11 to receive the level control signal output by the control chip circuit 11 to the low-power circuit 13. The low-power circuit 13 turns the switching transistor in the low-power circuit 13 on / off according to the received level control signal and DC power supply signal, and outputs the corresponding switching transistor control signal to prepare for controlling the power supply to the load circuit 20 according to the switching transistor control signal.

[0060] The first terminal of the voltage divider output unit 14 is connected to the second terminal of the feedback circuit 12, and is used to output the feedback signal corresponding to the actual standby voltage / actual working voltage to the feedback circuit 12. This is to prepare for the feedback circuit 12 to determine whether the actual standby voltage / actual working voltage meets the standby / working voltage requirements of the air conditioner. The second terminal of the voltage divider output unit 14 is connected to the first terminal of the control chip circuit 11, and the third terminal of the voltage divider output unit is grounded. This is used to receive the switching transistor control signal, so as to divide the voltage in the voltage divider output unit according to the switching transistor control signal and output the standby DC power supply signal or the DC power supply signal.

[0061] In some embodiments, such as Figure 5 The diagram shown is a control circuit diagram of the switching transistor of an air conditioner according to an embodiment of this utility model. (In conjunction with...) Figures 3-5 As shown, the switching transistor control circuit 15 includes: a first switching transistor control sub-circuit 16, the first terminal of which is connected to the second terminal of the voltage divider output unit 14, and the second terminal of which is connected to the sixth terminal of the control chip circuit 11, for receiving level control signals to turn on or off; a second switching transistor control sub-circuit 17, the first terminal of which is connected to the third terminal of the first switching transistor control sub-circuit 16, for receiving level control signals to turn on or off; and a third switching transistor control sub-circuit 18, the first terminal of which is connected to the first terminal of the control chip circuit 11, the second terminal of which is connected to the load circuit 20, and the third terminal of which is connected to the second terminal of the second switching transistor control sub-circuit 17, for receiving level control signals to turn on or off.

[0062] In this embodiment, the level control signal includes a high level signal when the air conditioner is in operation and a low level signal when it is in standby mode. The low-power circuit can be controlled by the new high level control signal. The load circuit 20 is divided into two parts according to requirements and experimental calibration, including: a load that does not need to be powered in the standby mode of the air conditioner, such as the temperature sensor circuit 64, the humidity sensor circuit 65, and the motor control circuit 66; and a load that needs to be powered in the standby mode of the air conditioner, such as the remote control wake-up circuit 63, which is used to receive wake-up commands issued by the remote control, etc. Since the remote control wake-up circuit 63 needs to receive the user's remote control signal and maintain a standby state that can be woken up at any time, the remote control wake-up circuit is not connected to the switch in the third switch control sub-circuit 18, but is directly powered by the power supply circuit 10.

[0063] The first terminal of the first switching transistor control circuit 16 is connected to the second terminal of the voltage divider output unit 14, and is used to receive the DC power supply signal output by the power supply circuit 10 to the first switching transistor control circuit 16. The second terminal of the first switching transistor control sub-circuit 16 is connected to the sixth terminal of the control chip circuit 11, and is used to receive the level control signal output by the control chip circuit 11 to the first switching transistor control circuit 16. Based on the DC power supply signal and the level control signal, the switching transistor in the first switching transistor control circuit 16 is turned on or off. Combined with the connection relationship with the voltage divider output unit 14, the output of the actual standby voltage or the actual working voltage is affected.

[0064] The first terminal of the second switch control sub-circuit 17 is connected to the third terminal of the first switch control sub-circuit 16. It is used to receive the level control signal output by the control chip circuit 11 to the second switch control circuit 17, in order to prepare for turning on or off the switch in the second switch control sub-circuit 17 according to the level control signal, thereby affecting the differentiated power supply to the load in the load circuit 20 according to the required voltage.

[0065] The first terminal of the third switch control sub-circuit 18 is connected to the first terminal of the control chip circuit 11, and is used to receive the DC power supply signal output by the power supply circuit 10 to the third switch control sub-circuit 18. The third terminal of the third switch control sub-circuit 18 is connected to the second terminal of the second switch control sub-circuit 17, and is used to receive the turn-on or turn-off signal output by the second switch control sub-circuit 17 according to the level control signal to the third switch control circuit 18. The second terminal of the third switch control sub-circuit 18 is connected to the load circuit 20, and is used to turn on or off the switch in the third switch control circuit 18 according to the received DC power supply signal and the turn-on or turn-off signal of the second switch control sub-circuit 17, so as to realize the differentiated power supply to the load in the load circuit 20 according to the required voltage.

[0066] In some embodiments, combined with Figures 3-5As shown, the first switching transistor control sub-circuit 16 includes: a first transistor 56, the emitter of the first transistor 56 is connected to the second terminal of the voltage divider output unit 14, and the collector of the first transistor 56 is connected to the third terminal of the voltage divider output unit 14; a first resistor 58, one end of the first resistor 58 is connected to the sixth terminal of the control chip circuit 11, and the other end of the first resistor 58 is connected to the base of the first transistor 56.

[0067] In this embodiment, the emitter of the first transistor 56 is connected to the second terminal of the voltage divider output unit 14 to receive the DC power supply signal output by the power supply circuit 10 into the first transistor 56. The collector of the first transistor 56 is connected to the third terminal of the voltage divider output unit 14 to output the actual standby voltage or the actual operating voltage according to the connection relationship with the voltage divider output unit 14. One end of the first resistor 58 is connected to the sixth terminal of the control chip circuit 11, and the other end of the first resistor 58 is connected to the base of the first transistor 56 to output the level control signal output by the control chip circuit 11 to the first transistor 56. At the same time, the first resistor 58 limits the base current and is typically 1KΩ to 3KΩ. Through the connection relationship between the first transistor 56, the voltage divider output unit 14, the first resistor 58, and the control chip circuit 11, the first transistor 56 can be turned on or off, thereby affecting the output of the actual standby voltage or the actual operating voltage.

[0068] For example, when the air conditioner is in operation, the control chip module 54 in the control chip circuit 11 sends a high-level control signal. This high-level signal passes through the first resistor 58 to the base of the first transistor 56. The emitter of the first transistor 56 receives a 5V DC power supply signal from the power supply circuit 10. Since the high-level voltage of 5V is the same as the DC power supply signal of 5V, the voltage drop between the emitter and base of the first transistor 56 is less than 0.7V, and the first transistor 56 is not conducting. The voltage value of VREF is determined by the voltage division between the fourth resistor 61 (R11) and the fifth resistor 62 (R12) in the voltage divider output unit 14. Assuming R11 = 10KΩ and R12 = 10KΩ, when the actual operating voltage output after R11 and R12 stabilizes at 5V, the feedback signal corresponding to 5V fed back to the feedback circuit 12 is VREF = 5V × R2 / (R1 + R2) = 2.5V. The voltage feedback module 53 sends a power supply control signal to the power supply circuit 10 to maintain the corresponding output voltage constant. After receiving the power supply control signal, the power supply circuit 10 will maintain the corresponding output voltage constant. When the actual output operating voltage is greater than 5V, the feedback signal VREF output to the voltage feedback module 53 is greater than 2.5V. The voltage feedback module determines that the output voltage is too high, so the voltage feedback module 53 sends a power supply control signal to control the switching power supply module to reduce the voltage output, so that the output voltage is reduced to 5V. When the actual output operating voltage is less than 5V, the feedback signal VREF output to the voltage feedback module 53 is less than 2.5V. The voltage feedback module determines that the output voltage is too low, so the voltage feedback module 53 sends a power supply control signal to control the switching power supply module to increase the voltage output, so that the output voltage is increased to 5V. This ensures that the actual operating voltage of the air conditioner is maintained at the voltage level required for operation, and ensures the normal and stable operation of the air conditioner.

[0069] For example, when the air conditioner enters standby mode, the control chip module 54 in the control chip circuit 11 sends a low level of 0V to the base of the first transistor 56. Since the emitter of the first transistor 56 is connected to the power supply circuit 10, and the received DC power supply signal from the power supply circuit 10 is 5V, the voltage drop between the emitter and base of the first transistor 56 will be greater than 0.7V. The emitter and collector of the first transistor 56 are connected, which is equivalent to the sixth resistor 70 (let's call it R13) and the fourth resistor 61 (R11) forming a parallel structure. Let's assume that the resistance of R13 is designed to be 3K. Since the reference voltage target control value of the voltage feedback module 53 in the feedback circuit 20 is 2.5V, the target control value VCC of the actual standby voltage of the air conditioner when in standby mode can be calculated as follows: (VREF / R12)×{[(R11×R13) / (R11+R13)]+R12}=3V When the actual standby voltage output is greater than 3V, the feedback signal VREF to the voltage feedback module 53 in the feedback circuit 12 is greater than 2.5V. The voltage feedback module 53 determines that the output voltage is too high, so the voltage feedback module 53 sends a power supply control signal to control the switching power supply module 52 to reduce the voltage output, so that the actual standby voltage output is reduced to 3V.

[0070] Conversely, when the actual standby voltage output is less than 3V, the feedback signal RREF output to the voltage feedback module 53 in the feedback circuit 12 is less than 2.5V. The voltage feedback module 53 determines that the output voltage is too low, so the voltage feedback module 53 sends a power supply control signal to control the switching power supply module to increase the voltage output, so that the output voltage rises to 3V, so as to ensure that the actual standby voltage of the air conditioner in standby mode is maintained at the voltage level required for standby, thereby achieving supply balance and reducing the energy consumption of the air conditioner in standby mode.

[0071] In some embodiments, combined with Figures 3-5 As shown, the second switching transistor control sub-circuit 17 includes: a second transistor 57, the emitter of the second transistor 57 is grounded, and the base of the second transistor 57 is connected to the base of the first transistor 56; a second resistor 60, one end of the second resistor 60 is connected to the third terminal of the third switching transistor control sub-circuit 18, and the other end of the second resistor 60 is connected to the collector of the second transistor 57.

[0072] In this embodiment, the base of the second transistor 57 is connected to the base of the first transistor 56 to receive the level control signal output by the control chip circuit 11 to the second transistor 57. The emitter of the second transistor 57 is grounded to turn the second transistor 57 on or off according to the received level control signal. One end of the second resistor 60 is connected to the third terminal of the third switch control sub-circuit 18, and the other end of the second resistor 60 is connected to the collector of the second transistor 57 to send the on or off signal of the second transistor 57 to the third switch control sub-circuit 18 in preparation for controlling the on or off of the switch in the third switch control sub-circuit 18.

[0073] For example, when the air conditioner is in operation, the high-level signal sent by the control chip module 54 in the control chip circuit 11 reaches the base of the second transistor 57 through the first resistor 58 in the first switching transistor control sub-circuit 16. Since the emitter of the second transistor 57 is connected to ground, the voltage drop between the base and emitter is higher than 0.7V, and the second transistor 57 is turned on. Then, the voltage at the base of the third transistor 55 in the third switching transistor control sub-circuit 18 is the voltage divider between the third resistor 59 (let's call it R15) and the second resistor 60 (let's call it R14). Resistor R14 limits the current, and its resistance is usually... The resistor R15 is used for voltage biasing and is usually set to 3KΩ~3KΩ. If R14 is 1KΩ and R15 is 3KΩ, then the voltage division is 5V×(R14) / (R15+R14)=1.25V. The voltage difference between R14 and R15 is 5V-1.25V=3.75V. That is, the voltage drop between the emitter and base of the third transistor 55 is greater than 0.7V, the third transistor 55 is turned on, and the power supply circuit 10 outputs the DC power supply signal to the subsequent load circuit 20 through the third transistor 55 to ensure the power supply of the load circuit 20 when the air conditioner is working.

[0074] For example, when the air conditioner is in standby mode, the low-level signal sent by the control chip module 54 in the control chip circuit 11 reaches the base of the second transistor 57 through the first resistor 58 in the first switching transistor control sub-circuit 16. Since the emitter of the second transistor 57 is connected to ground, the voltage drop between the base and emitter of the second transistor 57 is less than 0.7V, and the second transistor 57 is turned off. Because the emitter and base of the third transistor 55 in the third switching transistor control sub-circuit 18 are connected by resistor R15, when the second transistor 57 is turned off, the base voltage of the third transistor 55 remains consistent with the emitter voltage, making the voltage drop between the base and emitter of the third transistor 55 less than 0.7V, meaning the third transistor 55 is also turned off. Therefore, the power supply circuit 10 cannot output the DC power supply signal to the temperature sensor circuit 64, humidity sensor circuit 65, motor control circuit 66 and other downstream control circuit modules in the load circuit 20 that do not require power in the standby state of the air conditioner through the third transistor 55, thereby reducing the number of circuit modules that are powered in the standby state and achieving the purpose of reducing standby power consumption.

[0075] In some embodiments, combined with Figures 3-5 As shown, the third switch control sub-circuit 18 includes: a third transistor 55, the emitter of the third transistor 55 is connected to the first terminal of the control chip circuit 11, and the collector of the third transistor 55 is connected to the load circuit 20; a third resistor 59, one end of the third resistor 59 is connected to the emitter of the third transistor 55, and the other end of the third resistor 59 is connected to the base of the third transistor 55.

[0076] In this embodiment, the emitter of the third transistor 55 is connected to the first terminal of the control chip circuit 11 to receive the DC power supply signal output by the power supply circuit 10 to the third transistor 55. The collector of the third transistor 55 is connected to the load circuit 20 to supply power to the load circuit 20 when the third transistor 55 is turned on, and to stop supplying power to the temperature sensor circuit 64, humidity sensor circuit 65, and motor control circuit 66 in the load circuit 20 when the third transistor 55 is turned off. One end of the third resistor 59 is connected to the emitter of the third transistor 55, and the other end of the third resistor 59 is connected to the base of the third transistor 55. It is used to divide the voltage output to the base of the third transistor 55 when the second transistor 57 is turned on to control the conduction of the third transistor 55, or to control the turn-off of the third transistor 55 when the second transistor 57 is turned off. The third resistor 59 (set as R15) serves as a voltage bias and is usually set to 3KΩ~5KΩ, set to 3KΩ.

[0077] For example, when the air conditioner is in operation, the high-level signal sent by the control chip module 54 in the control chip circuit 11 reaches the base of the second transistor 57 through the first resistor 58 in the first switching transistor control sub-circuit 16. Since the emitter of the second transistor 57 is connected to ground, the voltage drop between the base and emitter is higher than 0.7V, and the second transistor 57 is turned on. Then, the voltage at the base of the third transistor 55 in the third switching transistor control sub-circuit 18 is the voltage divider between the third resistor 59 (let's call it R15) and the second resistor 60 (let's call it R14). Resistor R14 limits the current, and its resistance is usually... The resistor R15 is used for voltage biasing and is usually set to 3KΩ~3KΩ. If R14 is 1KΩ and R15 is 3KΩ, then the voltage division is 5V×(R14) / (R15+R14)=1.25V. The voltage difference between R14 and R15 is 5V-1.25V=3.75V. That is, the voltage drop between the emitter and base of the third transistor 55 is greater than 0.7V, the third transistor 55 is turned on, and the power supply circuit 10 outputs the DC power supply signal to the subsequent load circuit 20 through the third transistor 55 to ensure the power supply of the load circuit 20 when the air conditioner is working.

[0078] For example, when the air conditioner is in standby mode, the low-level signal sent by the control chip module 54 in the control chip circuit 11 reaches the base of the second transistor 57 through the first resistor 58 in the first switching transistor control sub-circuit 16. Since the emitter of the second transistor 57 is connected to ground, the voltage drop between the base and emitter of the second transistor 57 is less than 0.7V, and the second transistor 57 is turned off. Because the emitter and base of the third transistor 55 in the third switching transistor control sub-circuit 18 are connected by resistor R15, when the second transistor 57 is turned off, the base voltage of the third transistor 55 remains consistent with the emitter voltage, making the voltage drop between the base and emitter of the third transistor 55 less than 0.7V, meaning the third transistor 55 is also turned off. Therefore, the power supply circuit 10 cannot output the DC power supply signal to the temperature sensor circuit 64, humidity sensor circuit 65, motor control circuit 66 and other downstream control circuit modules in the load circuit 20 that do not require power in the standby state of the air conditioner through the third transistor 55, thereby reducing the number of circuit modules that are powered in the standby state and achieving the purpose of reducing standby power consumption.

[0079] In some embodiments, combined with Figures 3-5 As shown, the voltage divider output unit 14 includes: a fourth resistor 61, one end of which is connected to the second terminal of the power supply circuit 10, and the other end of which is connected to the second terminal of the feedback circuit 12; and a fifth resistor 62, one end of which is connected to the other end of the fourth resistor 61, and the other end of which is grounded.

[0080] In this embodiment, one end of the fourth resistor 61 is connected to the second terminal of the power supply circuit 10, and the other end of the fourth resistor 61 is connected to the second terminal of the feedback circuit 12. One end of the fifth resistor 62 is connected to the other end of the fourth resistor 61, and the other end of the fifth resistor 62 is grounded. This is used to divide the voltage output by the first transistor 56 by the fourth resistor 61 and the fifth resistor 62 when the first transistor 56 is turned off, thereby outputting the actual working voltage to ensure the voltage required by the air conditioner in the working state, and to output the feedback signal corresponding to the actual working voltage to the feedback circuit 12 to prepare for stabilizing the voltage required by the air conditioner in the working state at 5V.

[0081] For example, when the air conditioner is in operation, the control chip module 54 in the control chip circuit 11 sends a high-level control signal. This high-level signal passes through the first resistor 58 to the base of the first transistor 56. The emitter of the first transistor 56 receives a 5V DC power supply signal from the power supply circuit 10. Since the high-level voltage of 5V is the same as the DC power supply signal of 5V, the voltage drop between the emitter and base of the first transistor 56 is less than 0.7V, and the first transistor 56 is not conducting. The voltage value of VREF is determined by the voltage division between the fourth resistor 61 (R11) and the fifth resistor 62 (R12) in the voltage divider output unit 14. Assuming R11 = 10KΩ and R12 = 10KΩ, when the actual operating voltage output after R11 and R12 stabilizes at 5V, the feedback signal corresponding to 5V fed back to the feedback circuit 12 is VREF = 5V × R2 / (R1 + R2) = 2.5V. The voltage feedback module 53 sends a power supply control signal to the power supply circuit 10 to maintain the corresponding output voltage constant. After receiving the power supply control signal, the power supply circuit 10 will maintain the corresponding output voltage constant. When the actual output operating voltage is greater than 5V, the feedback signal VREF output to the voltage feedback module 53 is greater than 2.5V. The voltage feedback module determines that the output voltage is too high, so the voltage feedback module 53 sends a power supply control signal to control the switching power supply module to reduce the voltage output, so that the output voltage is reduced to 5V. When the actual output operating voltage is less than 5V, the feedback signal VREF output to the voltage feedback module 53 is less than 2.5V. The voltage feedback module determines that the output voltage is too low, so the voltage feedback module 53 sends a power supply control signal to control the switching power supply module to increase the voltage output, so that the output voltage is increased to 5V. This ensures that the actual operating voltage of the air conditioner is maintained at the voltage level required for operation, and ensures the normal and stable operation of the air conditioner.

[0082] In some embodiments, combined with Figures 3-5 As shown, the air conditioner 1 also includes: a sixth resistor 70, one end of which is connected to the third terminal of the first switching tube control sub-circuit 16, and the other end of which is connected to one end of the fifth resistor 62 or the other end of the fourth resistor 61, for forming a voltage divider output unit 14 with the fifth resistor 62.

[0083] In this embodiment, one end of the sixth resistor 70 is connected to the third terminal of the first switching transistor control sub-circuit 16, and the other end of the sixth resistor 70 is connected to one end of the fifth resistor 62 or the other end of the fourth resistor 61. This is used to divide the voltage output by the first transistor 56 by the fourth resistor 61 and the sixth resistor 70 when the first transistor 56 is turned on in the first switching transistor control sub-circuit 16, thereby outputting the actual standby voltage to ensure the voltage required by the air conditioner in standby mode, and to output the feedback signal corresponding to the actual standby voltage to the feedback circuit 12 to prepare for stabilizing the voltage required by the air conditioner in working mode at 3V.

[0084] For example, when the air conditioner enters standby mode, the control chip module 54 in the control chip circuit 11 sends a low level of 0V to the base of the first transistor 56. Since the emitter of the first transistor 56 is connected to the power supply circuit 10, and the received DC power supply signal from the power supply circuit 10 is 5V, the voltage drop between the emitter and base of the first transistor 56 will be greater than 0.7V. The emitter and collector of the first transistor 56 are connected, which is equivalent to the sixth resistor 70 (let's call it R13) and the fourth resistor 61 (R11) forming a parallel structure. Let's assume that the resistance of R13 is designed to be 3K. Since the reference voltage target control value of the voltage feedback module 53 in the feedback circuit 20 is 2.5V, the target control value VCC of the actual standby voltage of the air conditioner when in standby mode can be calculated as follows: (VREF / R12)×{[(R11×R13) / (R11+R13)]+R12}=3V When the actual standby voltage output is greater than 3V, the feedback signal VREF to the voltage feedback module 53 in the feedback circuit 12 is greater than 2.5V. The voltage feedback module 53 determines that the output voltage is too high, so the voltage feedback module 53 sends a power supply control signal to control the switching power supply module 52 to reduce the voltage output, so that the actual standby voltage output is reduced to 3V.

[0085] Conversely, when the actual standby voltage output is less than 3V, the feedback signal RREF output to the voltage feedback module 53 in the feedback circuit 12 is less than 2.5V. The voltage feedback module 53 determines that the output voltage is too low, so the voltage feedback module 53 sends a power supply control signal to control the switching power supply module to increase the voltage output, so that the output voltage rises to 3V, so as to ensure that the actual standby voltage of the air conditioner is stable in the standby state.

[0086] In some embodiments, such as Figure 6The diagram shown is a power supply circuit diagram of an air conditioner according to an embodiment of the present invention. The power supply circuit 10 includes: a rectifier bridge circuit 22, the third terminal of which is connected to the live wire 50, and the second terminal of which is connected to the neutral wire 51, for receiving AC power signals and outputting rectified DC signals; and a switching power supply sub-circuit 23, the first terminal of which is connected to the first terminal of the rectifier bridge circuit 22, and the fifth terminal of which is connected to the fourth terminal of the rectifier bridge circuit 22, for receiving rectified DC signals and outputting DC power.

[0087] In this embodiment, the third terminal of the rectifier bridge circuit 22 is connected to the live wire 50, and the second terminal of the rectifier bridge circuit 22 is connected to the neutral wire 51. This is used to receive the 220V AC power input into the rectifier bridge circuit 22, rectify the AC power into DC power, and use it as a rectified DC signal to provide power to the air conditioner. The first terminal of the switching power supply sub-circuit 23 is connected to the first terminal of the rectifier bridge circuit 22, and the fifth terminal of the switching power supply sub-circuit 23 is connected to the fourth terminal of the rectifier bridge circuit 22. When the 220V input is used, the DC power is usually a high-voltage DC power of 220V × 1.414 ≈ 310V. The high-voltage DC power is converted into low-voltage DC power, for example, 5V, by the switching power supply module 52 in the switching power supply sub-circuit 23. This low-voltage DC power is then output as DC power to the control chip module 54 and the remote control wake-up circuit 63, thereby converting the high-voltage DC power into the low-voltage DC power required by the air conditioner and ensuring the normal operation of the air conditioner.

[0088] In some embodiments, such as Figure 6 As shown, the air conditioner 1 also includes a capacitor 24, one end of which is connected to the first terminal of the rectifier bridge circuit 22, and the other end of which is connected to the fourth terminal of the rectifier bridge circuit 22, for receiving rectified DC signals and outputting smooth DC signals.

[0089] In this embodiment, one end of capacitor 24 is connected to the first end of rectifier bridge circuit 22, and the other end of capacitor 24 is connected to the fourth end of rectifier bridge circuit 22. AC power 220V is input into rectifier bridge circuit 22, which rectifies AC power into DC power and outputs it as a rectified DC signal to capacitor 24. Capacitor 24 performs smoothing filtering on the rectified DC signal to form a stable DC power, which is output as a smoothed DC signal to switching power supply sub-circuit 23 to ensure the stability of power supply.

[0090] According to the embodiment of this utility model, the air conditioner, based on the connection relationship between the power supply circuit, the control chip circuit, the low-power circuit, and the feedback circuit, supplies power to the air conditioner by outputting a DC power supply signal through the power supply circuit. The control chip circuit outputs a level control signal to the low-power circuit only through its sixth terminal. The low-power circuit combines the level control signal and the DC power supply signal. When the air conditioner is in standby mode, it outputs a stepped-down standby DC power supply signal to ensure the voltage required for standby, and / or outputs a switching transistor control signal to disconnect power to loads that do not require power, thus saving standby power consumption. When the air conditioner is in operating mode, it outputs a DC power supply signal to ensure the voltage required for operation, and / or outputs a switching transistor control signal to supply power to the load. It also outputs the standby DC power supply signal or a corresponding feedback signal from the DC power supply signal to the feedback circuit. The feedback circuit judges the feedback signal and outputs a power supply control signal to the power supply circuit to maintain a stable voltage at the voltage required by the air conditioner. This ensures the stability of the air conditioner's power supply and controls the voltage output by the power supply circuit during standby within the minimum operating voltage range of the chip circuit, effectively reducing the standby power consumption of the air conditioner.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0092] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioner characterized by comprising: include: The power supply circuit has a first terminal connected to the live wire and a fifth terminal connected to the neutral wire, used to receive AC power signals and output DC power signals. A control chip circuit, wherein the first terminal of the control chip circuit is connected to the second terminal of the power supply circuit, and is used to receive the DC power supply signal and output a level control signal; A low-power circuit, wherein the first terminal of the low-power circuit is connected to the second terminal of the power supply circuit or the first terminal of the control chip circuit, the third terminal of the low-power circuit is grounded, the seventh terminal of the low-power circuit is connected to the third terminal of the power supply circuit or the seventh terminal of the control chip circuit, and the eighth terminal of the low-power circuit is connected to the sixth terminal of the control chip circuit, for receiving the level control signal, outputting a standby DC power supply signal or a DC power supply signal, and / or outputting a switching transistor control signal; A feedback circuit, wherein the first end of the feedback circuit is connected to the fourth end of the power supply circuit, and the second end of the feedback circuit is connected to the fifth end of the low-power circuit, is used to receive the standby DC power supply signal or the DC power supply signal, and output the power supply control signal of the power supply circuit.

2. The air conditioner of claim 1, wherein The low-power circuit includes: A switching transistor control circuit, wherein the first and fifth terminals of the switching transistor control circuit are connected to the first terminal of the control chip circuit, the third terminal of the switching transistor control circuit is grounded, and the sixth terminal of the switching transistor control circuit is connected to the sixth terminal of the control chip circuit, for receiving the level control signal and outputting the switching transistor control signal; The voltage divider output unit has a first terminal connected to the second terminal of the feedback circuit, a second terminal connected to the first terminal of the control chip circuit, and a third terminal grounded. It is used to receive the control signal of the switching transistor and output the standby DC power supply signal or the DC power supply signal.

3. The air conditioner of claim 2, wherein The switching transistor control circuit includes: The first switching transistor control sub-circuit has a first terminal connected to the second terminal of the voltage divider output unit and a second terminal connected to the sixth terminal of the control chip circuit, used to receive level control signals to turn on or off. The second switching transistor control sub-circuit has its first terminal connected to the third terminal of the first switching transistor control sub-circuit, and is used to receive level control signals to turn on or off. The third switch control sub-circuit has its first terminal connected to the first terminal of the control chip circuit, its second terminal connected to the load circuit, and its third terminal connected to the second terminal of the second switch control sub-circuit, and is used to receive level control signals to turn the circuit on or off.

4. The air conditioner of claim 3, wherein The first switching transistor control sub-circuit includes: The first transistor has its emitter connected to the second terminal of the voltage divider output unit, and its collector connected to the third terminal of the voltage divider output unit. A first resistor, one end of which is connected to the sixth terminal of the control chip circuit, and the other end of which is connected to the base of the first transistor.

5. The air conditioner of claim 3, wherein The second switching transistor control sub-circuit includes: The second transistor has its emitter grounded and its base connected to the base of the first transistor. The second resistor has one end connected to the third terminal of the third switch control sub-circuit, and the other end connected to the collector of the second transistor.

6. The air conditioner of claim 3, wherein The third switch control sub-circuit includes: The third transistor has its emitter connected to the first terminal of the control chip circuit and its collector connected to the load circuit. A third resistor, one end of which is connected to the emitter of the third transistor, and the other end of which is connected to the base of the third transistor.

7. The air conditioner of claim 2, wherein The voltage divider output unit includes: A fourth resistor, one end of which is connected to the second terminal of the power supply circuit, and the other end of which is connected to the second terminal of the feedback circuit; The fifth resistor has one end connected to the other end of the fourth resistor, and the other end of the fifth resistor is grounded.

8. The air conditioner of claim 7, wherein The air conditioner also includes: The sixth resistor has one end connected to the third terminal of the first switching transistor control sub-circuit, and the other end connected to one end of the fifth resistor or the other end of the fourth resistor, for forming the voltage divider output unit with the fifth resistor.

9. The air conditioner of claim 1, wherein The power supply circuit includes: A rectifier bridge circuit, wherein the third terminal of the rectifier bridge circuit is connected to the live wire and the second terminal of the rectifier bridge circuit is connected to the neutral wire, is used to receive AC power signals and output rectified DC signals; A switching power supply sub-circuit, wherein the first terminal of the switching power supply sub-circuit is connected to the first terminal of the rectifier bridge circuit, and the fifth terminal of the switching power supply sub-circuit is connected to the fourth terminal of the rectifier bridge circuit, for receiving the rectified DC signal and outputting the DC power supply signal.

10. The air conditioner of claim 9, wherein The air conditioner also includes: A capacitor, one end of which is connected to the first terminal of the rectifier bridge circuit, and the other end of which is connected to the fourth terminal of the rectifier bridge circuit, is used to receive the rectified DC signal and output a smooth DC signal.

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