Air conditioner

Abstract

The air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises an indoor communication module and an indoor power management module, and the indoor unit is connected between an alternating current power supply and the indoor communication module and used for receiving alternating current provided by the alternating current power supply and adjusting the circuit state of the indoor unit according to the voltage value corresponding to the alternating current. Therefore, the driving current suitable for the work of the indoor communication module is output, so that the indoor communication module works normally or is prevented from being damaged, a user does not need to manually change the resistance value of the indoor power supply management module, the convenience and the reliability are improved, and the user experience is improved. Meanwhile, the situation that the indoor communication module is damaged due to too large driving current can be avoided, or the situation that normal communication of the indoor communication module cannot be achieved due to too small driving current can be avoided, and the stability and reliability of the air conditioner are improved.

Description

TECHNICAL FIELD

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

[0002] At present, the indoor and outdoor communication circuit of air conditioner mostly adopts current loop design principle, constructs half wave rectifier circuit through connecting resistance and diode between firewire and zero line, and generates stable power supply voltage with zero line as reference ground through stabilizing tube, realizes communication through sending and receiving of indoor and outdoor optocoupler on communication circuit.

[0003] Current air conditioner general AC input voltage includes 220V and 110V, and for different AC input voltage, in order to adapt to AC input voltage, indoor communication circuit's voltage dividing resistance needs to be replaced, thereby bringing inconvenience for user. When user forgets to replace voltage dividing resistance or plugs in wrong power supply, then the situation that AC input voltage and voltage dividing resistance do not match can appear, further causes current to be too large and damages the device in communication circuit, or causes current to be too small and makes communication circuit unable to communicate normally, reduces the reliability of communication circuit. INVENTION CONTENTS

[0004] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the purpose of the utility model is to provide an air conditioner.

[0005] The utility model provides an air conditioner, which comprises:

[0006] An indoor unit and an outdoor unit.

[0007] The indoor unit comprises an indoor power module, an indoor controller, an indoor communication module and an indoor unit load.

[0008] The outdoor unit comprises an outdoor power module, an outdoor controller, an outdoor communication module and an outdoor unit load.

[0009] The indoor power module is connected to an AC power supply and is used to convert AC power provided by the AC power supply into first DC power suitable for powering the indoor controller and the indoor unit load.

[0010] The indoor controller is used to control the operating state of the indoor communication module and the indoor unit load.

[0011] The outdoor power module is connected to the AC power supply and is used to convert AC power provided by the AC power supply into second DC power suitable for powering the outdoor controller and the outdoor unit load.

[0012] The indoor controller is used to control the operating state of the outdoor communication module and the outdoor unit load.

[0013] The indoor communication module and the outdoor communication module communicate with each other to realize indoor and outdoor communication of the air conditioner;

[0014] The indoor unit further comprises:

[0015] The indoor power management module is connected between the AC power supply and the indoor communication module, is used for receiving the AC power provided by the AC power supply, and adjusts the circuit state of itself according to the high or low of the voltage value corresponding to the AC power, so as to adjust the circuit resistance value of itself, thereby outputting the driving current suitable for the working of the indoor communication module, so as to make the indoor communication module work normally or avoid being damaged.

[0016] According to the air conditioner of the embodiment of the present application, the indoor power management module is connected between the AC power supply and the indoor communication module, can receive the AC power provided by the AC power supply, and adaptively adjusts the circuit state of itself according to the high or low of the voltage value corresponding to the AC power, so as to change the resistance value of itself, for example, increase or decrease the resistance value, and then output the driving current suitable for the working of the indoor communication module, that is, the circuit resistance value suitable for the input AC power can be adaptively adjusted, so that the user does not need to manually change the resistance value of the indoor power management module, the convenience and reliability are improved, and at the same time, the indoor communication module can be prevented from being damaged due to the excessive driving current, or the indoor communication module can be prevented from being unable to normally communicate due to the insufficient driving current, and the stability and reliability of the air conditioner are improved.

[0017] In addition, the air conditioner according to the embodiment of the present application can also have the following additional technical features:

[0018] Further, the indoor power management module comprises a switch unit, a first resistance unit and a second resistance unit; one end of the first resistance unit is connected to the AC power supply, and the other end of the first resistance unit is connected to the indoor communication module; the switch unit and the second resistance unit are connected in series, and the branch formed after the switch unit and the second resistance unit are connected in series is connected in parallel with the first resistance unit; the switch unit adjusts the on-off state of itself to connect or not connect the second resistance unit in parallel with the first resistance unit, so as to adjust the circuit resistance value of the indoor power management module, thereby outputting the driving current suitable for the working of the indoor communication module.

[0019] The above technical solution has the following advantages or beneficial effects: whether the second resistance unit is connected in parallel with the first resistance unit can be determined by controlling the on-off state of the switch unit, so as to change the resistance value, and then output the driving current suitable for the working of the indoor communication module, so that the indoor communication module is protected from being damaged.

[0020] Further, the switch unit comprises: a first switch tube, one end of the first switch tube is connected with one end of the second resistance unit, and the second end of the first switch tube is connected with the indoor communication module; a second switch tube, the control end of the second switch tube is connected with one end of the first resistance unit, the control end of the second switch tube is also connected with the other end of the second resistance unit, the first end of the second switch tube is connected with the control end of the first switch tube, and the second end of the second switch tube is connected with the second end of the first switch tube.

[0021] The above technical solution has the following advantages or beneficial effects: the on-off state of the first switch tube can be controlled according to the on-off state of the second switch tube, and the resistance value in the indoor power management module is changed, so that the indoor communication module outputs appropriate driving current, and the controllability of the driving current is realized.

[0022] Further, the first resistance unit comprises: a first resistance, one end of the first resistance is connected with the AC power supply, and the other end of the first resistance is connected with one end of a second resistance; the second resistance, the other end of the second resistance is connected with a third resistance; the third resistance, the other end of the third resistance is connected with the indoor communication module, and the other end of the third resistance is also connected with the second end of the first switch tube.

[0023] The above technical solution has the following advantages or beneficial effects: the driving current of the indoor communication module can be effectively controlled according to the on-off state of the first switch tube and the series connection of the first resistance, the second resistance and the third resistance.

[0024] Further, the second resistance unit comprises: a fourth resistance, one end of the fourth resistance is connected with the AC power supply, one end of the fourth resistance is also connected with one end of the first resistance, and the other end of the fourth resistance is connected with one end of a fifth resistance; the fifth resistance, the other end of the fifth resistance is connected with one end of a sixth resistance; the sixth resistance, the other end of the sixth resistance is connected with the control end of the first switch tube.

[0025] The above technical solution has the following advantages or beneficial effects: the driving current of the indoor communication module can be effectively controlled according to the on-off state of the first switch tube and the series connection of the fourth resistance, the fifth resistance and the sixth resistance.

[0026] Further, the indoor power management module further comprises: a third resistance unit, the third resistance unit comprises: a seventh resistance, one end of the seventh resistance is connected to one end of the first resistance, and the other end of the seventh resistance is connected to one end of the fourth resistance; the other end of the seventh resistance is connected to the control end of the first switch tube, and the other end of the seventh resistance is also connected to the first end of the second switch tube; an eighth resistance, one end of the eighth resistance is connected to the other end of the seventh resistance, and the other end of the eighth resistance is connected to the second end of the first switch tube; a ninth resistance, one end of the ninth resistance is connected to one end of the first resistance, and the other end of the ninth resistance is connected to one end of the tenth resistance; and the tenth resistance, the other end of the tenth resistance is connected to the second end of the second switch tube, and the other end of the tenth resistance is also connected to the second end of the first switch tube.

[0027] The technical scheme has the following advantages or beneficial effects: the voltage division of the seventh resistance, the eighth resistance, the ninth resistance and the tenth resistance can improve the accuracy of the on-off control of the first switch tube and the second switch tube.

[0028] Further, the indoor power management module further comprises: a third resistance unit, the third resistance unit comprises: a seventh resistance, one end of the seventh resistance is connected to one end of the first resistance, and the other end of the seventh resistance is connected to one end of the fourth resistance; the other end of the seventh resistance is connected to the control end of the first switch tube, and the other end of the seventh resistance is also connected to the first end of the second switch tube; an eighth resistance, one end of the eighth resistance is connected to the other end of the seventh resistance, and the other end of the eighth resistance is connected to the second end of the first switch tube; a ninth resistance, one end of the ninth resistance is connected to one end of the first resistance, and the other end of the ninth resistance is connected to one end of the tenth resistance; and the tenth resistance, the other end of the tenth resistance is connected to the second end of the second switch tube, and the other end of the tenth resistance is also connected to the second end of the first switch tube.

[0029] The technical scheme has the following advantages or beneficial effects: the voltage on the control end of the second switch tube is kept within a preset stable range, which helps to improve the working stability and reliability of the second switch tube, and further improves the stability of the indoor power management module, so that it can work efficiently and stably under various voltage conditions.

[0030] Further, the indoor power management module further comprises: a third resistance unit, the third resistance unit comprises: a seventh resistance, one end of the seventh resistance is connected to one end of the first resistance, and the other end of the seventh resistance is connected to one end of the fourth resistance; the other end of the seventh resistance is connected to the control end of the first switch tube, and the other end of the seventh resistance is also connected to the first end of the second switch tube; an eighth resistance, one end of the eighth resistance is connected to the other end of the seventh resistance, and the other end of the eighth resistance is connected to the second end of the first switch tube; a ninth resistance, one end of the ninth resistance is connected to one end of the first resistance, and the other end of the ninth resistance is connected to one end of the tenth resistance; and the tenth resistance, the other end of the tenth resistance is connected to the second end of the second switch tube, and the other end of the tenth resistance is also connected to the second end of the first switch tube.

[0031] The technical scheme has the following advantages or beneficial effects: the first diode and the second diode can protect the first switch tube and the second switch tube from being damaged by high voltage.

[0032] Further, the indoor power management module further comprises a rectifier diode, an anode of the rectifier diode is connected to the AC power supply, a cathode of the rectifier diode is connected to one end of the first resistor, the cathode of the rectifier diode is connected to one end of the fourth resistor, the cathode of the rectifier diode is connected to one end of the seventh resistor, and the cathode of the rectifier diode is further connected to one end of the ninth resistor.

[0033] The technical scheme has the advantages or beneficial effects that the rectification of the rectifier diode can adapt the indoor power management module to different AC power supply inputs, thereby providing stable and safe driving current for the indoor communication module.

[0034] Further, the air conditioner further comprises a controller configured to set the conduction voltage threshold of the first switch tube and the second switch tube.

[0035] The technical scheme has the advantages or beneficial effects that the conduction threshold of the first switch tube and the second switch tube can be controlled to adjust the resistance of the indoor power management module, thereby outputting driving current suitable for the operation of the indoor communication module.

[0036] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0037] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

[0038] Figure 1 is a structural schematic diagram of an air conditioner according to one embodiment of the present application;

[0039] Figure 2 is a structural schematic diagram of a controller according to one embodiment of the present application;

[0040] Figure 3 is a structural schematic diagram of an air conditioner according to another embodiment of the present application;

[0041] Figure 4 is a connection schematic diagram of modules in an air conditioner according to one embodiment of the present application;

[0042] Figure 5 is a structural schematic diagram of an indoor power management module according to one embodiment of the present application;

[0043] Figure 6 is a structural schematic diagram of a switch unit according to one embodiment of the present application;

[0044] Figure 7 is a circuit schematic diagram of an air conditioner according to an embodiment of the present application;

[0045] Figure 8 is a structure schematic diagram of an air conditioner according to another embodiment of the present application;

[0046] Figure 9 is a waveform schematic diagram of an input power supply of an alternating current power supply according to an embodiment of the present application, the input power supply being 220V;

[0047] Figure 10 is a waveform schematic diagram of an input power supply of an alternating current power supply according to an embodiment of the present application, the input power supply being 110V. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0049] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0050] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0051] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] The embodiment of the utility model provides a kind of air conditioner 10, refer to Figure 1 The air conditioner 10 includes refrigeration system, for carrying out heat exchange with indoor air, to realize refrigeration or heating demand.

[0053] Refrigeration system includes compressor, condenser, electronic expansion valve and evaporator, the utility model discloses air conditioner 10 is executed refrigeration cycle of air conditioner 10 by using compressor, condenser, electronic expansion valve and evaporator.A refrigeration cycle includes a series of processes, involves compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been adjusted and heat exchanged.

[0054] Compressor compresses refrigerant gas in high-temperature high-pressure state and discharges compressed refrigerant gas.The discharged refrigerant gas flows into condenser.Condenser condenses compressed refrigerant into liquid phase, and heat is released to the surrounding environment through condensation process.

[0055] Electronic expansion valve expands liquid-phase refrigerant in high-temperature high-pressure state condensed in condenser into low-pressure liquid-phase refrigerant.Evaporator evaporates refrigerant expanded in electronic expansion valve, and returns refrigerant gas in low-temperature low-pressure state to compressor.

[0056] Evaporator can achieve refrigeration effect by exchanging heat with material to be cooled using latent heat of evaporation of refrigerant.Air conditioner 10 can adjust the temperature of indoor space in the entire cycle.

[0057] Outdoor unit 2 of air conditioner 10 refers to the part of refrigeration cycle including compressor and outdoor heat exchanger, indoor unit 1 of air conditioner 10 includes indoor heat exchanger, and electronic expansion valve can be provided in indoor unit 1 or outdoor unit 2.

[0058] Indoor heat exchanger and outdoor heat exchanger are used as condenser or evaporator.When indoor heat exchanger is used as condenser, air conditioner 10 is used as heater in heating mode, and when indoor heat exchanger is used as evaporator, air conditioner 10 is used as cooler in cooling mode.

[0059] Air conditioner 10 in the utility model includes indoor unit 1 and outdoor unit 2, and indoor unit 1 and outdoor unit 2 can be set as all-in-one machine or split machine.Indoor unit 1 can be set as wall-mounted type, ceiling machine, ducted air conditioner, etc., and indoor unit 1 is installed on the top or top of indoor room.

[0060] Refer to Figure 1 Take indoor hanging machine as an example, indoor hanging machine is usually installed at indoor wall surface or the like, and indoor cabinet machine (not shown in the figure) is also one indoor unit 1 form of indoor unit 1.

[0061] Taking a split air conditioner as an example, the air conditioner 10 comprises an indoor unit 1 and an outdoor unit 2, wherein the outdoor unit 2 is usually arranged outdoors and used for heat exchange with the indoor environment.

[0062] In addition, as shown in the figure, the air conditioner 10 is provided with a controller 71 to control the operation of each component in the air conditioner 10, so that each component of the air conditioner 10 operates to realize each predetermined function of the air conditioner 10. In the air conditioner 10, a control device 200 is also attached, which is exemplarily arranged as a remote controller having a function of communicating with the controller 71 by using infrared rays or other communication modes. The remote controller is used for the user to control the air conditioner 10, so as to realize the interaction between the user and the air conditioner 10.

[0063] In the embodiment of the utility model, the indoor unit 1 of the air conditioner 10 is arranged at the top or upper part of the indoor, generally, the installation height of the indoor unit 1 is higher than the user activity area, the indoor unit 1 comprises a return air inlet and an air outlet communicated with the indoor, indoor air passes through the return air inlet indoor unit 1 and flows back to the indoor through the air outlet.

[0064] The refrigerant circulation loop in the utility model makes the refrigerant circulate in the loop composed of the compressor, the condenser, the electronic expansion valve and the evaporator, one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger. The indoor heat exchanger is used for heat exchange with the air in the indoor unit 1, and the outdoor heat exchanger of the outdoor unit 2 is used for heat exchange with the air in the outdoor unit 2, so as to realize the refrigeration or heating demand of the air conditioner 10.

[0065] The indoor unit 1 further comprises an indoor fan, which is arranged at the indoor heat exchanger close to the return air inlet or the air outlet, and is used for sending the heat-exchanged air to the indoor, and the indoor fan comprises a plurality of gears for changing the air outlet speed of the air flow of the air outlet.

[0066] A wind deflector is arranged at the position of the air outlet, the wind deflector adjusts the outflow direction of the air flowing through the air outlet by changing the relative rotation angle of the wind deflector and the air outlet, so as to cause the influence on the temperature stratification of the indoor air.

[0067] In the embodiment shown in the utility model, the air conditioner 10 further comprises a controller 71, which is a device capable of generating an operation control signal according to an instruction operation code and a time sequence signal, and instructing the air conditioner 10 to execute a control instruction. For example, in response to the power-on or power-off instruction issued by the user, the controller 71 can execute the operation related to the object selected by the power-on or power-off instruction.

[0068] The embodiment of the utility model further provides a hardware structure schematic diagram of the controller 71, as shown in Figure 2As 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, the memory 82 and the communication interface 84 are connected through a bus 81.

[0069] The processor 83 can be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller 718, a programmable logic device (PLD), or any combination thereof. The processor 83 can also be other devices with processing capabilities, such as a circuit, a device, or a software module. The processor 83 can also include multiple CPUs, and the processor 83 can be a single-CPU processor 83 or a multi-CPU processor 83. The processor 83 herein can refer to one or more devices, circuits, or processing cores for processing data (e.g., computer program instructions).

[0070] The memory 82 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magneto-optical disk, a magnetic disk storage or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and that can be accessed by a computer, without any limitation on the present embodiment. The memory 82 can exist independently or be integrated with the processor 83. The memory 82 can include computer program code. The processor 83 is configured to execute the computer program code stored in the memory 82, thereby implementing the control method of the air conditioner provided in the present embodiment.

[0071] The communication interface 84 can be used to communicate with other devices or communication networks (e.g., 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 enabling communication.

[0072] The bus 81 can be a peripheral component interconnect (PCI) bus 81 or an extended industry standard architecture (EISA) bus 81, etc. The bus 81 can be divided into an address bus 81, a data bus 81, a control bus 81, etc. For ease of representation, Figure 2 Only one thick line is used to represent the bus 81, but it does not mean that there is only one bus 81 or one type of bus 81.

[0073] The following will be described with reference to Figures 3-10 The air conditioner according to an embodiment of the present application is described.

[0074] Figure 3 is a structural schematic diagram of an air conditioner according to an embodiment of the present application. As shown in Figure 3 An air conditioner 10 includes an indoor unit 1 and an outdoor unit 2.

[0075] As shown in Figure 4 The indoor unit 1 includes an indoor power supply module 11, an indoor controller 12, an indoor communication module 13, and an indoor unit load 14; the indoor power supply module 1 is connected to an alternating current power supply, and is used to convert alternating current provided by the alternating current power supply into first direct current suitable for powering the indoor controller 12 and the indoor unit load 14; the indoor controller 12 is used to control the operating state of the indoor communication module 13 and the indoor unit load 14.

[0076] The outdoor unit 2 includes an outdoor power supply module 21, an outdoor controller 22, an outdoor communication module 23, and an outdoor unit load 24; the outdoor power supply module 21 is connected to an alternating current power supply, and is used to convert alternating current provided by the alternating current power supply into second direct current suitable for powering the outdoor controller 22 and the outdoor unit load 24; the indoor controller 22 is used to control the operating state of the outdoor communication module 23 and the outdoor unit load 24; the indoor communication module 13 and the outdoor communication module 23 communicate with each other to realize indoor and outdoor communication of the air conditioner 10.

[0077] The indoor unit 1 further comprises an indoor power management module 15 connected between the AC power supply and the indoor communication module 13, for receiving the AC power provided by the AC power supply, and adjusting the circuit state and the circuit resistance value of the indoor power management module 15 according to the voltage value of the AC power, so as to output a driving current suitable for the working of the indoor communication module 13, so as to make the indoor communication module 13 work normally or avoid being damaged.

[0078] In an embodiment, as shown in Figure 4 The indoor power module 11 is connected with the AC power supply, so as to convert the AC power provided by the AC power supply into a first DC power suitable for supplying power to the indoor controller 12 and the indoor unit load 14. For example, after the AC power supply provides 220V or 110V AC power, the indoor power module 11 converts the 220V or 110V AC power into 5V or 15V first DC power, and supplies the first DC power to the indoor controller 12 and the indoor unit load for working. The indoor unit load 14 may, for example, include an indoor fan motor and a swing motor.

[0079] The indoor controller 12 is connected with the indoor communication module 13 and the indoor unit load 14, respectively. After the indoor controller 12 starts working, it controls the working state of the indoor communication module 13 and the indoor unit load 14 according to the received communication signal, for example, adjusts the speed of the indoor fan motor or controls the direction of the swing motor.

[0080] As shown in Figure 4 The indoor unit 1 and the outdoor unit 2 are connected through the signal line SI. The outdoor power module 21 can receive the AC power transmitted by the indoor unit 1, and convert the AC power into a second DC power suitable for supplying power to the outdoor controller 22 and the outdoor unit load 24. For example, the 220V or 110V AC power is converted into 5V or 15V second DC power. The outdoor controller 22 starts working after being powered. Since the outdoor controller 22 is connected with the outdoor communication module 23 and the outdoor unit load 24, respectively, the outdoor controller 22 can control the working state of the outdoor communication module 23 and the outdoor unit load 24 according to the received communication signal, for example, the communication signal sent by the indoor unit 1 or an external device. The outdoor unit load 24 may, for example, include a compressor, an outdoor fan motor, etc.

[0081] In addition, as shown in Figure 4As shown, the indoor unit 1 further comprises an indoor power management module 15 connected between the AC power supply and the indoor communication module 13, which can receive AC power provided by the AC power supply, for example, 220V or 110V AC power, and dynamically adjust its circuit state according to the voltage value corresponding to the AC power, and further adjust its resistance value. For example, when the voltage value corresponding to the AC power is relatively high, the indoor power management module 15 will adjust its circuit state to adaptively increase its resistance value to limit the current size in the circuit, thereby reducing the drive current flowing into the indoor communication module 13 for operation. If the voltage value corresponding to the AC power is relatively low, the indoor power management module 15 will adjust its circuit state to reduce its resistance value, thereby adaptively increasing the drive current flowing into the indoor communication module 13 for operation. In this way, the indoor power management module 15 can automatically adjust its resistance value according to the voltage value corresponding to the AC power to adaptively adjust the drive current flowing into the indoor communication module 13, so that the indoor power management module 15 can maintain stable voltage output under different voltage environments, providing stable drive current for the indoor communication module 13, and avoiding the need to replace different resistors to match the current AC power according to the voltage value corresponding to the AC power. In addition, it also avoids damaging the indoor communication module 13 due to excessive or insufficient drive current, thereby improving the stability and reliability of the overall air conditioner 10.

[0082] In addition, as shown in Figure 4 The air conditioner 10 further comprises a relay K1, one end of the relay K1 being connected to the input live wire (i.e. L-IN) of the AC power supply, and the other end of the relay K1 being connected to the output live wire (i.e. L-OUT) of the indoor unit 1. The on-off state of the relay K1 is controlled to control the power-on state of the outdoor unit 2. For example, when the relay K1 is turned on, the AC power supply can provide certain AC power to the outdoor unit 2 through the relay K1. When the relay K1 is turned off, the AC power supply will not be able to provide power to the outdoor unit 2 through the relay K1, so that the outdoor unit 2 cannot be powered on.

[0083] As shown in Figure 4As shown, the air conditioner 10 further comprises a peripheral wiring unit, which includes a first indoor terminal row X1, a second indoor terminal row X2, an outdoor terminal row X3, an AC input power line L1 and an indoor-outdoor connection line L2. One end of the AC input power line L1 is connected to an AC power source, and the other end is connected to the first indoor terminal row X1 to provide power supply for the entire air conditioner 10. The first indoor terminal row X1 is specially used for connecting the AC input power line L1 to ensure that the indoor controller 12 can obtain a stable power source. One end of the second indoor terminal row X2 is connected to the output end of the indoor controller 12, and the other end is connected to the outdoor terminal row X3 through the indoor-outdoor connection line L2 to supply power to the outdoor controller 22 through the second indoor terminal row X2. The other end of the outdoor terminal row X3 is connected to the input end of the outdoor controller 22, which completes the entire process of power transmission and signal communication from the indoor unit 1 to the outdoor unit 2, and ensures the cooperative work and real-time exchange of information between the indoor and outdoor components of the air conditioner 10.

[0084] In an embodiment of the present application, as shown in Figure 5 The indoor power management module 15 includes a switch unit 151, a first resistance unit 152 and a second resistance unit 153. One end of the first resistance unit 152 is connected to an AC power source, and the other end is connected to the indoor communication module 13. The switch unit 151 and the second resistance unit 153 are connected in series, and the branch formed after the switch unit 151 and the second resistance unit 153 are connected in series is connected in parallel with the first resistance unit 152. The switch unit 151 adjusts its on-off state to connect or not connect the second resistance unit 153 in parallel with the first resistance unit 152, so as to adjust the circuit resistance value of the indoor power management module 15, and output a driving current suitable for the operation of the indoor communication module 13.

[0085] In an embodiment, as shown in Figure 5As shown, the first resistance unit 152 is connected with the alternating current power supply, and the other end thereof is connected with the indoor communication module 13; the switch unit 151 is connected with the second resistance unit 153 in series, and the branch formed after the second resistance unit 1523 is connected with the switch unit 151 in series is connected with the first resistance unit 152 in parallel. In this way, according to the voltage of the alternating current input by the alternating current power supply, the on-off state of the switch unit 151 can be controlled, so as to connect or not connect the second resistance unit 153 with the first resistance unit 152 in parallel. For example, when the voltage value of the alternating current power supply is high, the switch unit 151 is in the off state, and the second resistance unit 153 cannot be connected with the first resistance unit 152 in parallel, so that the resistance value in the indoor power supply management module 15 is increased, and the driving current flowing into the indoor communication module 13 will not be too high; when the voltage value of the alternating current power supply is low, the switch unit 151 is in the on state, and the second resistance unit 153 is connected with the first resistance unit 152 in parallel, so that the resistance value in the indoor power supply management module 15 is reduced, and the driving current flowing into the indoor communication module 13 will not be too low. Therefore, by controlling the on-off state of the switch unit 151, the resistance value of the indoor power supply management module 15 can be controlled, and the driving current suitable for the working of the indoor communication module 13 can be output, so that the indoor communication module 13 is prevented from being damaged, and the indoor communication module 13 is protected.

[0086] In an embodiment of the utility model, as shown in the figure, Figure 6 The switch unit 151 comprises a first switch tube V914 and a second switch tube V915, one end of the first switch tube V914 is connected with the second resistance unit 153, and the second end S of the first switch tube V914 is connected with the indoor communication module 13; the control end B of the second switch tube V915 is connected with one end of the first resistance unit 152, and the control end B of the second switch tube V915 is also connected with the other end of the second resistance unit 153; the first end C of the second switch tube V915 is connected with the control end G of the first switch tube V914, and the second end E of the second switch tube V915 is connected with the second end S of the first switch tube V914.

[0087] The first switch tube V914 is a MOS tube, the first end D of the first switch tube V914 is the drain of the MOS tube, the second end S of the first switch tube V914 is the source of the MOS tube, and the control end G of the first switch tube V914 is the gate of the MOS tube; the second switch tube V915 is a triode, the first end C of the second switch tube V915 is the collector of the triode, the second end E of the second switch tube V915 is the emitter of the triode, and the control end B of the second switch tube V915 is the base of the triode.

[0088] In an embodiment, as shown in the figure, Figure 6As shown, the first end D of the first switch tube V914 is connected to one end of the second resistance unit 153, and the second end S of the first switch tube V914 is connected to the indoor communication module 13, and the control end G of the first switch tube V914 is connected to the first end C of the second switch tube V915.

[0089] The control end B of the second switch tube V915 is connected to one end of the first resistance unit 152, and the control end B of the second switch tube V915 is also connected to one end of the second resistance unit 153, and the second end E of the second switch tube V915 is connected to the second end S of the first switch tube V914, so that the on-off state of the first switch tube V914 can be controlled by controlling the on-off state of the second switch tube V915, so that whether the second resistance unit 153 is connected in parallel with the first resistance unit 152 is controlled according to the on-off state of the first switch tube V914, thereby realizing the control of the driving current between the indoor communication module 13 and the first resistance unit 152 and the second resistance unit 153 through the cooperation of the first switch tube V914 and the second switch tube V915, and further improving the stability of the indoor communication module 13 and the controllability of the driving current.

[0090] In an embodiment of the present application, as shown in Figure 7 The first resistance unit 152 comprises: a first resistance R921, a second resistance R922 and a third resistance R923, one end of the first resistance R921 is connected to an alternating current power supply, and the other end of the first resistance R921 is connected to one end of the second resistance R922; the other end of the second resistance R922 is connected to the third resistance R923; the other end of the third resistance R923 is connected to the indoor communication module 13, and the other end of the third resistance R923 is also connected to the second end S of the first switch tube V914.

[0091] In an embodiment, as shown in Figure 7 The other end of the first resistance R921 is connected to one end of the third resistance R923 through the second resistance R922, and the other end of the third resistance R923 is connected to the indoor communication module 13, that is, the first resistance R921, the second resistance R922 and the third resistance R923 are connected in series, realizing the transmission and distribution of the alternating current provided by the alternating current power supply to meet the working requirements of the indoor communication module 13; at the same time, the other end of the third resistance R923 is also connected to the second end S of the first switch tube V914, which not only ensures the stability and reliability of the circuit, but also can effectively control the driving current of the indoor communication module 13 according to the on-off state of the first switch tube V914, thereby realizing more delicate circuit control and communication management.

[0092] In an embodiment of the present application, as shown in Figure 7As shown, the second resistance unit 153 comprises a fourth resistance R900, a fifth resistance R901 and a sixth resistance R902, one end of the fourth resistance R900 is connected with the AC power supply, one end of the fourth resistance R900 is also connected with one end of the first resistance R921, and the other end of the fourth resistance R900 is connected with one end of the fifth resistance R901; the other end of the fifth resistance R901 is connected with one end of the sixth resistance R902; and the other end of the sixth resistance R902 is connected with the first end D of the first switch tube V914.

[0093] In an embodiment, as shown in Figure 7 one end of the fourth resistance R900 is connected with the AC power supply for receiving and distributing the voltage from the AC power supply, the other end of the fourth resistance R900 is connected with one end of the fifth resistance R901 and the sixth resistance R902 through the fifth resistance R901, and the other end of the sixth resistance R902 is connected with the first end D of the first switch tube V914, so that the adjusted voltage can be supplied to the first switch tube V914 through the sixth resistance R902 to realize the adjustment of the resistance value according to the switching state of the first switch tube V914, and further realize the adjustment of the driving current of the indoor communication module 13.

[0094] In an embodiment of the utility model, as shown in Figure 7 the indoor power management module 15 further comprises a third resistance unit (not shown in the figure), the third resistance unit comprises a seventh resistance R924, an eighth resistance R927, a ninth resistance R925 and a tenth resistance R926, one end of the seventh resistance R924 is connected with one end of the first resistance R921, one end of the seventh resistance R924 is also connected with one end of the fourth resistance R900, the other end of the seventh resistance R924 is connected with the control end G of the first switch tube V914, and the other end of the seventh resistance R924 is also connected with the first end C of the second switch tube V915; one end of the eighth resistance R927 is connected with the other end of the seventh resistance R924, the other end of the eighth resistance R927 is connected with the second end S of the first switch tube V914; one end of the ninth resistance R925 is connected with one end of the first resistance R921, one end of the ninth resistance R925 is also connected with one end of the fourth resistance R900, the other end of the ninth resistance R925 is connected with one end of the tenth resistance R926; the other end of the tenth resistance R926 is connected with the second end E of the second switch tube V915, and the other end of the tenth resistance R926 is also connected with the second end S of the first switch tube V914.

[0095] In an embodiment, one end of the seventh resistor R924 is connected to one end of the first resistor R921 and one end of the fourth resistor R900 respectively, and the other end of the fourth resistor R924 is connected to the control end G of the first switch tube V914 and the first end C of the second switch tube V915 respectively, so that the seventh resistor R924 can participate in the control of the two switch tubes through voltage division. Further, one end of the eighth resistor R927 is connected to the other end of the seventh resistor R924, and the other end of the eighth resistor R927 is connected to the second end S of the first switch tube V914, thereby providing an additional resistance value for the control circuit of the first switch tube V914 to realize voltage division.

[0096] Meanwhile, one end of the ninth resistor R925 is also connected to the common end of the first resistor R921 and the fourth resistor R900, and the other end of the ninth resistor R925 is connected to one end of the tenth resistor R926, and the other end of the tenth resistor R926 is connected to the second end E of the second switch tube V915 and the second end S of the first switch tube V914, so that the control of the first switch tube V914 and the second switch tube V915 can be realized through the voltage division of the ninth resistor R925 and the tenth resistor R926.

[0097] In an embodiment of the utility model, as shown in Figure 7 The indoor power management module 15 further comprises a voltage stabilizing diode V916, the negative electrode of the voltage stabilizing diode V916 is connected to the other end of the ninth resistor R925, and the positive electrode of the voltage stabilizing diode V916 is connected to the control end B of the second switch tube V915.

[0098] In an embodiment, as shown in Figure 7 The negative electrode of the voltage stabilizing diode V916 is connected to the other end of the ninth resistor R925, and the positive electrode of the voltage stabilizing diode V916 is connected to the control end B of the second switch tube V915, and the voltage stabilizing diode V916 can provide a stable voltage reference for the control end B of the second switch tube V915 by using its unique voltage stabilizing characteristics, for example, when the voltage fluctuates, the voltage stabilizing diode V916 can absorb or release excess voltage, thereby ensuring that the voltage on the control end B of the second switch tube V915 is maintained within a predetermined stable range, which helps to improve the working stability and reliability of the second switch tube V915, thereby improving the stability of the indoor power management module 13, so that it can maintain high efficiency and stable operation under various voltage conditions.

[0099] In an embodiment of the utility model, as shown in Figure 7As shown, the indoor power management module 15 further comprises: a first diode V918 and a second diode V919, the cathode of the first diode V918 is connected between the anode of the voltage stabilizing diode V916 and the control end B of the second switch tube V915, the anode of the first diode V918 is connected to the second end E of the second switch tube V915, and the anode of the first diode V918 is also connected to the second end S of the first switch tube V914; the cathode of the second diode V919 is connected to the control end G of the first switch tube V914, and the anode of the second diode V919 is connected to the second end S of the first switch tube V914.

[0100] In an embodiment, as shown in Figure 7 the cathode of the first diode V918 is connected to the position where the anode of the voltage stabilizing diode V916 and the control end B of the second switch tube V915 are connected, and the anode of the first diode V918 is connected to the second end E of the second switch tube V915 and the second end S of the first switch tube V914 at the same time, so that when the control end B of the second switch tube V915 receives the stable voltage signal from the voltage stabilizing diode V916, the stable voltage signal can be effectively transmitted to the second end E of the second switch tube V915 and the second end S of the first switch tube V914 through the first diode V918, which helps to enhance the reliability and stability of the circuit.

[0101] On the other hand, the cathode of the second diode V919 is connected to the control end G of the first switch tube V914, and the anode of the second diode V919 is connected to the second end S of the first switch tube V914, so that a protective current loop is formed between the control end G and the second end S of the first switch tube V914, and when the control end G of the first switch tube V914 is subjected to abnormal voltage impact, the second diode V919 can be quickly turned on to shunt the excess current to the second end S, thereby effectively preventing the first switch tube V914 from being damaged due to overvoltage.

[0102] In an embodiment of the utility model, as shown in Figure 7 the indoor power management module 15 further comprises: a rectifier diode V900, the anode of the rectifier diode V900 is connected to an alternating current power supply, one end of the cathode of the rectifier diode V900 is connected to the first resistor R921, one end of the cathode of the rectifier diode V900 is connected to the fourth resistor R900, one end of the cathode of the rectifier diode V900 is connected to the seventh resistor R924, and one end of the cathode of the rectifier diode V900 is also connected to the ninth resistor R925.

[0103] In an embodiment, as shown in Figure 8As shown, the anode of the rectifier diode V900 is connected with the alternating power supply, and the cathode of the rectifier diode V900 is connected with the first resistor R921, the fourth resistor R900, the seventh resistor R927 and the ninth resistor R925 respectively, so that the alternating power supply can convert the alternating current signal into a direct current signal through the rectifier diode V900, and the direct current signal is effectively distributed to the first resistor R921, the fourth resistor R900, the seventh resistor R927 and the ninth resistor R925, thereby improving the overall efficiency and stability of the circuit. Through the rectification effect of the rectifier diode V900, the indoor power management module 15 can better adapt to various alternating current inputs and provide stable and safe driving current for the indoor communication module 13.

[0104] In an embodiment of the present application, as shown in Figure 7 The air conditioner 10 further comprises a controller 71, and the controller 71 is configured to configure the conduction voltage threshold of the first switch tube V914 and the second switch tube V915.

[0105] In an embodiment, as shown in Figure 8 and Figure 7 The controller 71 can configure the conduction voltage threshold of the first switch tube V914 and the second switch tube V915, and through the regulation of the controller 71, the voltage point at which the two switch tubes start to conduct electricity can be flexibly adjusted, thereby realizing more precise control of the internal circuit of the air conditioner 10 and improving the working efficiency and performance stability of the air conditioner 10.

[0106] As shown in Figure 7 The connection point between the ninth resistor R925 and the tenth resistor R926 is marked as H, and the connection point between the seventh resistor R925 and the eighth resistor R927 is marked as A, and at the same time, the controller 71 can determine the conduction voltage threshold of the first switch tube V914 and the second switch tube V915 based on the voltage of the connection points A and H.

[0107] Specifically, the voltage V H of the connection point H between the ninth resistor R925 and the tenth resistor R926 is as follows:

[0108] ┈ ;

[0109] Among them, is the peak voltage of the alternating input, and since the voltage sampling point of the ninth resistor R925 and the tenth resistor R926 is taken after the rectifier diode V900, it is a half-wave rectified voltage, so it is a half-wave alternating current, which is only the upper half of the alternating current.

[0110] Let V1 be the threshold voltage of the second switching transistor V915. The threshold voltage V1 of the second switching transistor V915 is the voltage of the Zener diode V916 and the voltage between the control terminal B and the second terminal E of the second switching transistor V915 (i.e., V...). BE The sum of the voltages can be adjusted by changing the Zener diode V916 to set different on-state voltage thresholds V1. For example, the on-state voltage threshold V1 of the second switching transistor V915 can be set to 5V, then the resistance of the ninth resistor R925 can be 32K and the resistance of the tenth resistor R926 can be 1K.

[0111] When the AC power input voltage is 110V, the resistance of the tenth resistor R926 is 1KΩ, and the resistance of the ninth resistor R925 is 32KΩ. Then the maximum voltage at connection point H is:

[0112] ;

[0113] In order to turn on the second switching transistor V915 under low voltage, the turn-on power threshold of the second switching transistor V915 is set. Set to 5V, corresponding to the peak AC input voltage for:

[0114] ;

[0115] That is, when the highest voltage of the AC power input is 179V, the second switch V915 is turned on.

[0116] Additionally, the on-voltage threshold of the first switching transistor V914 is denoted as Vgs(th), and the voltage at connection point A between the seventh resistor R924 and the eighth resistor R927 is denoted as V. A (i.e., the voltage at the control terminal G of the first switching transistor V914), then the voltage V at connection point A. A Voltage curve:

[0117] ┈ ;

[0118] Similarly, The peak AC input voltage is obtained because the voltage sampling points of the seventh resistor R924 and the eighth resistor R927 are after the rectifier diode V900, and the voltage obtained is the voltage after half-wave rectification. Therefore, it is half-wave AC, which is only the first half-cycle AC.

[0119] When the second switch V915 is turned off, the voltage V at connection point A is... A Conforms to V AThe first switch tube V914 is turned on when the voltage difference between the control end G and the second end S of the first switch tube V914 is greater than the turn-on voltage threshold Vgs(th) of the first switch tube V914, and the first switch tube V914 is turned off when the voltage difference between the control end G and the second end S of the first switch tube V914 is less than the turn-on voltage threshold Vgs(th) of the first switch tube V914. When the second switch tube V915 meets the turn-on condition, the voltage V A of the connection point A jumps to 0V, and the first switch tube V914 is turned off.

[0120] In summary, as shown in Figure 9 , the AC input power line L1 is connected to the first indoor terminal row X1 of the air conditioner 10, wherein the ground wire GND is a safety protection ground wire, the input live wire L-IN and the input zero wire N-IN of the AC input power line L1 are power supply wires, and are connected to the indoor controller 12 after being connected. In the standby state, the outdoor unit 2 is not powered on, and the indoor-outdoor communication is disconnected. When the air conditioner 10 is running, the indoor controller 12 and the outdoor controller 22 transmit information through the signal line SI of the indoor-outdoor connection line L2.

[0121] The AC input power line L1 is connected to the indoor power module 11 of the indoor controller 22 through the input live wire L-IN and the input zero wire N-IN of the first indoor terminal row X1, and converts the AC high voltage (for example, 220V) input by the AC power supply into low voltage DC (for example, 5V or 12V) through the indoor power module 11, and provides the indoor controller 12 to control the running state of the indoor unit load 14.

[0122] At the same time, the live wire L and the zero wire N provide a power supply for the indoor-outdoor communication circuit through the half-wave rectification circuit, as shown in the first waveform in Figure 9 , the first resistor R921, the second resistor R922, the third resistor R923, and the fourth resistor R900, the fifth resistor R901, and the sixth resistor R902 play a role in voltage reduction and current limiting, the rectifier diode V900 plays a role in half-wave rectification, the capacitor C900 plays a role in energy storage and filtering, and the voltage stabilizing diode V901 plays a role in stabilizing the voltage. A 24V voltage stabilizing diode is usually selected.

[0123] The first optocoupler B900, the second optocoupler B901, the third optocoupler B931 and the fourth optocoupler B932 serve the signal transmission and electrical isolation, wherein the first optocoupler B900 is the indoor communication signal transmitting end, the second optocoupler B901 is the indoor communication signal receiving end, the third optocoupler B931 is the outdoor communication signal transmitting end, and the fourth optocoupler B932 is the outdoor communication signal receiving end. In order to ensure the reliable transmission of the communication signal, the transmitting end needs to be maintained in the always-on state after sending the signal, so as to ensure that the entire communication loop is conductive, and thus the receiving end can reliably receive the signal. For example, when the indoor communication signal transmitting end first optocoupler B900 sends the communication signal, the outdoor communication signal transmitting end third optocoupler B931 is in the always-on state; and when the outdoor communication signal transmitting end third optocoupler B931 sends the communication signal, the indoor communication signal transmitting end first optocoupler B900 is in the always-on state.

[0124] The third diode V903, the fourth diode V902, the fifth diode V931 and the second voltage stabilizing diode V901, the third voltage stabilizing diode V932 serve the one-way isolation and protection, preventing the abnormal high voltage from damaging the communication circuit due to the error wiring during the installation of the air conditioner 10. For example, if the live wire L is mistakenly connected to the indoor side signal line SI, since there is the fourth diode V902, the current cannot flow reversely through the fourth diode V902, thereby protecting the first optocoupler B900 and the second optocoupler B901 from being damaged. If the live wire L of the alternating current power supply is mistakenly connected to the zero line N, since there are the third diode V903 and the second voltage stabilizing diode V901, the voltage between the first optocoupler B900 and the second optocoupler B901 can be limited, thereby protecting the first optocoupler B900 and the second optocoupler B901 from being damaged. Similarly, if the live wire L of the alternating current power supply is mistakenly connected to the outdoor side zero line N, since there is the fifth diode V931, the current cannot flow reversely through the third optocoupler V931, and the third voltage stabilizing diode V932 limits the voltage between the third optocoupler B931 and the fourth optocoupler B932, thereby protecting the third optocoupler B931 and the fourth optocoupler B932 from being damaged.

[0125] When abnormally high current occurs in the indoor communication module 13 and the outdoor communication module 23, the first thermistor RT900 and the second thermistor RT901 will heat up rapidly, and their resistance will increase rapidly, quickly reducing the current in the circuit and preventing damage to the communication circuit caused by incorrect wiring during the installation of the air conditioner 10. For example, if the live wire L of the AC power supply is mistakenly connected to the neutral wire N on the indoor side, the first thermistor RT900 will heat up rapidly, and its resistance will increase rapidly, quickly reducing the current in the circuit and protecting the third diode V903 from damage. If the live wire L of the AC power supply is mistakenly connected to the outdoor signal line SI, the second thermistor RT901 will heat up rapidly, and its resistance will increase rapidly, which can quickly reduce the current, thereby protecting the fifth diode V931 and the third Zener diode V932 from damage. At the same time, the third Zener diode V932 can limit the driving current flowing into the third optocoupler B931 and the fourth optocoupler B932, thus protecting the third optocoupler B931 and the fourth optocoupler B932.

[0126] Specifically, when the air conditioner 10 receives a start-up command, the indoor controller 12 controls the relay K1 to close, supplying power to the outdoor controller 22. The ninth resistor R925 and the tenth resistor R926 divide the voltage difference between the half-wave rectified AC power supply and the 24V voltage (the power supply voltage for the communication circuit), and record this voltage as the voltage at point H, V. H Voltage at point H V H As the voltage of the AC power supply changes periodically, when the voltage V at point H... H Less than the on-voltage threshold of the second switching transistor V915 Time (e.g., V) H When the voltage is less than 5V, the peak AC input voltage Um is less than 179V. The second switch V915 is in the off state, and the voltage at the control terminal (G) of the first switch V914, i.e., the voltage at connection point A, is related to V. A The voltage curves are consistent. When the voltage difference between the control terminal G and the second terminal S of the first switching transistor V914 is less than the voltage difference V between the control terminal G and the second terminal S of the first switching transistor... GS When the conduction voltage threshold Vgs(th) is reached, the first switch V914 is in the off state. When the voltage difference V between the control terminal G and the second terminal S of the first switch V914 is reached, the first switch V914 is in the off state. GSWhen the voltage exceeds the on-state voltage threshold Vgs(th) of the first switching transistor V914, the first switching transistor V914 is in the on state. Then, the fourth resistor R900, the fifth resistor R901, and the sixth resistor R902 are connected in the circuit. The fourth resistor R900, the fifth resistor R901, and the sixth resistor R90 are connected in parallel with the first resistor R921, the second resistor R922, and the third resistor R923 and then connected in the circuit, which reduces the resistance in the series circuit. This increases the drive current and ensures that the optocoupler has sufficient drive current.

[0127] When the voltage at point H is V H The voltage is greater than the on-state voltage threshold of the second switching transistor V915. Time (e.g., V) H When the voltage is >5V, the peak AC input voltage Um is greater than 165V. The second switch V915 is turned on, the potential at connection point A is low, and the first switch V914 is in the off state. Only the first resistor R921, the second resistor R922 and the third resistor R923 are connected in the circuit in the indoor power management module 15, so that the resistance in the circuit is relatively increased. In this way, the drive current is not too large when the AC power supply is connected to a high voltage, thus avoiding damage to the optocoupler.

[0128] For example, if a user mistakenly plugs a 110V power supply into a 220V power supply, this can protect the optocoupler of the indoor / outdoor communication module 13 from damage. The input voltage waveform of the AC power supply, the voltage waveform at point H, the voltage waveform at point A, the voltage across the first resistor unit 152, the voltage across the second resistor unit 153, the on / off state of the second switching transistor V915 (i.e., the transistor), and the on / off state of the first switching transistor V914 (i.e., the MOSFET) can be referenced. Figure 10 and Figure 9 As shown. Among them, Figure 10 The waveform diagram is for an AC power supply with an input voltage of 220V. Figure 7 The waveform diagram is for an AC power supply with an input voltage of 110V.

[0129] like ​ As shown, the current supplied by the AC power supply charges capacitor C900 after passing through rectifier diode V900. Under the constraint of Zener diode V901, the voltage across capacitor C900 is controlled to not exceed the voltage of Zener diode V901, typically 24V. At this time, the first optocoupler B900 is cut off, therefore no communication signal is output from signal line SI to outdoor unit controller 22, outdoor unit 2 is not powered, and thus outdoor communication module 23 cannot operate.

[0130] When the voltage across the capacitor C900 has stabilized at 24V, at this time the indoor controller 12 turns on the first optocoupler B900, and the driving current sequentially passes through the first optocoupler B900, the second optocoupler B901, the fourth diode V902 and the first thermistor RT900 of the indoor controller 12 from the capacitor C900, and then passes through the signal line SI to the second thermistor RT901 and the fifth diode V931 of the outdoor controller 22 to control the third optocoupler B931 of the outdoor unit 2 to turn on, so that the indoor controller 12 can send a communication instruction by controlling the on-off of the first optocoupler B900, for example, when the first optocoupler B900 is turned on, the communication instruction is a high-level signal (for example, 1), and when the first optocoupler B900 is turned off, the communication instruction is a low-level signal (for example, 0).

[0131] After the indoor controller 12 sends the communication instruction, the third optocoupler B932 of the outdoor unit 2 receives the communication instruction sent by the indoor controller 12, and controls the outdoor unit load 24 to start working according to the communication instruction; when the indoor controller 12 sends the communication instruction, the first optocoupler B900 is turned on, and the outdoor controller 22 replies to the communication instruction, and similarly, the outdoor controller 22 sends a communication instruction by controlling the on-off of the third optocoupler B931, that is, when the third optocoupler B900 is turned on, the communication instruction is a high-level signal (for example, 1), and when the third optocoupler B900 is turned off, the communication instruction is a low-level signal (for example, 0), and the indoor controller 12 receives the communication instruction sent by the outdoor controller 22 through the second optocoupler B901, and controls the working state of the indoor unit load 14 according to the received communication instruction, and prepares to send a new communication instruction to the outdoor unit 2.

[0132] According to the air conditioner 10 of the embodiment of the utility model, the indoor power management module 15 is connected between the AC power supply and the indoor communication module 13, can receive the AC power provided by the AC power supply, and according to the high and low of the voltage value corresponding to the AC power, adaptively adjusts the circuit state of itself to change the resistance value of itself, for example, increases or reduces the resistance value, and then outputs the driving current suitable for the working of the indoor communication module 13, that is, can adaptively adjust the circuit resistance value suitable for the input AC power, so that the user does not need to manually change the resistance value of the indoor power management module 15, improves the convenience and reliability, and also can avoid that the indoor communication module 13 is damaged due to the too large driving current, or can avoid that the indoor communication module 13 cannot normally communicate due to the too small driving current, improves the stability and reliability of the air conditioner.

[0133] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example.

[0134] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that, include: Indoor unit and outdoor unit; The indoor unit includes: an indoor power module, an indoor controller, an indoor communication module, and an indoor unit load; The outdoor unit includes: an outdoor power module, an outdoor controller, an outdoor communication module, and an outdoor unit load; The indoor power module is connected to an AC power source and is used to convert the AC power provided by the AC power source into a first DC power suitable for powering the indoor controller and the indoor unit load. The indoor controller is used to control the operating status of the indoor communication module and the indoor unit load; The outdoor power module is connected to the AC power source and is used to convert the AC power provided by the AC power source into a second DC power suitable for powering the outdoor controller and the outdoor unit load. The indoor controller is used to control the operating status of the outdoor communication module and the outdoor unit load; The indoor communication module and the outdoor communication module communicate with each other to realize indoor-outdoor communication of the air conditioner; The indoor unit also includes: The indoor power management module is connected between the AC power supply and the indoor communication module. It receives the AC power supplied by the AC power supply and adjusts its own circuit state according to the voltage value of the AC power, thereby adjusting its own circuit resistance value and outputting a drive current suitable for the operation of the indoor communication module, so as to enable the indoor communication module to work normally or avoid damage.

2. The air conditioner according to claim 1, characterized in that, The indoor power management module includes: a switch unit, a first resistor unit, and a second resistor unit; One end of the first resistor unit is connected to the AC power supply, and the other end of the first resistor unit is connected to the indoor communication module; The switching unit is connected in series with the second resistor unit, and the branch formed by the series connection of the switching unit and the second resistor unit is connected in parallel with the first resistor unit. The switching unit adjusts its on / off state to connect the second resistor unit in parallel with the first resistor unit or not in parallel with the first resistor unit, thereby adjusting the circuit resistance value of the indoor power management module and outputting a drive current suitable for the operation of the indoor communication module.

3. The air conditioner according to claim 2, characterized in that, The switching unit includes: A first switching transistor, the first end of which is connected to one end of the second resistor unit, and the second end of which is connected to the indoor communication module; The second switch has its control terminal connected to one end of the first resistor unit and the other end of the second resistor unit. The first end of the second switch is connected to the control terminal of the first switch, and the second end of the second switch is connected to the second end of the first switch.

4. The air conditioner according to claim 3, characterized in that, The first resistor unit includes: A first resistor, one end of which is connected to the AC power source, and the other end of which is connected to one end of a second resistor; The second resistor, the other end of which is connected to the third resistor; The third resistor has one end connected to the indoor communication module, and the other end of the third resistor is also connected to the second end of the first switching transistor.

5. The air conditioner according to claim 4, characterized in that, The second resistor unit includes: The fourth resistor has one end connected to the AC power supply, another end of the fourth resistor is also connected to one end of the first resistor, and the other end of the fourth resistor is connected to one end of the fifth resistor. The fifth resistor, the other end of which is connected to one end of the sixth resistor; The sixth resistor has its other end connected to the control terminal of the first switching transistor.

6. The air conditioner according to claim 5, characterized in that, The indoor power management module further includes: a third resistor unit, the third resistor unit comprising: A seventh resistor, one end of which is connected to one end of the first resistor, and one end of which is also connected to one end of the fourth resistor; the other end of which is connected to the control terminal of the first switching transistor, and the other end of which is also connected to the first terminal of the second switching transistor. The eighth resistor has one end connected to the other end of the seventh resistor, and the other end of the eighth resistor is connected to the second end of the first switching transistor. The ninth resistor has one end connected to one end of the first resistor, one end of the ninth resistor is also connected to one end of the fourth resistor, and the other end of the ninth resistor is connected to one end of the tenth resistor. The tenth resistor has one end connected to the second terminal of the second switching transistor, and the other end of the tenth resistor is also connected to the second terminal of the first switching transistor.

7. The air conditioner according to claim 6, characterized in that, The indoor power management module also includes: A Zener diode, the negative terminal of which is connected to the other end of the ninth resistor, and the positive terminal of which is connected to the control terminal of the second switching transistor.

8. The air conditioner according to claim 7, characterized in that, The indoor power management module also includes: A first diode, the cathode of which is connected between the anode of the Zener diode and the control terminal of the second switching transistor, and the anode of which is connected to the second terminal of the second switching transistor. The anode of the first diode is also connected to the second terminal of the first switching transistor. The second diode has its cathode connected to the control terminal of the first switching transistor, and its anode connected to the second terminal of the first switching transistor.

9. The air conditioner according to claim 8, characterized in that, The indoor power management module also includes: A rectifier diode, wherein the anode of the rectifier diode is connected to the AC power supply, the cathode of the rectifier diode is connected to one end of the first resistor, the cathode of the rectifier diode is connected to one end of the fourth resistor, the cathode of the rectifier diode is connected to one end of the seventh resistor, and the cathode of the rectifier diode is also connected to one end of the ninth resistor.

10. The air conditioner according to claim 3, characterized in that, The air conditioner also includes: A controller is used to configure the on-voltage threshold of the first switch and the second switch.

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