Indoor unit of air conditioner, air conditioner, control method of air conditioner, medium and controller

Abstract

The invention discloses an indoor unit of an air conditioner, the air conditioner, a control method of the air conditioner, a medium and a controller. The air conditioner further comprises an outdoor unit, and the indoor unit comprises a power generation device, a control device and a draught fan. The power generation device is connected in a refrigerant loop between the indoor unit and the outdoor unit and is used for supplying power to the control device under the action of a flowing refrigerant in the refrigerant loop; and the control device comprises a controller, and the controller is used for establishing communication connection with the outdoor unit after the control device is electrified and controlling the fan through the communication connection according to the operation information of the outdoor unit. The power generation device is arranged to stably supply power to the controller in the indoor unit, and the indoor unit is free of power supply line and strong current connection. The problems that a power line power supply mode is adopted, a power connecting line is needed, installation is complex, a high-voltage conversion module is needed, lightning stroke and mains supply fluctuation are prone to damage, and personnel safety is prone to be endangered after a power line is damaged are solved. And meanwhile, the problem of electromagnetic radiation caused by a wireless power supply mode is also avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an indoor unit of an air conditioner, an air conditioner and a control method, a medium and a controller thereof. Background Art

[0002] Related air conditioners use power cords to power the indoor unit's electronic control, or use wireless power transmission to power the indoor unit's electronic control. The power cord power supply method requires a power connection cable, which is complicated to install and requires a high-voltage conversion module. Lightning strikes and city power fluctuations can easily cause damage, and a damaged power cord can easily endanger personnel safety. The wireless power supply method also has the problem of electromagnetic radiation. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one object of the present invention is to provide an indoor unit of an air conditioner, which can stably supply power to a controller in the indoor unit by arranging a power generation device, so that the indoor unit has no power supply line and no strong power connection.

[0004] A second object of the present invention is to provide an air conditioner.

[0005] A third object of the present invention is to provide a control method for an air conditioner.

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

[0007] A fifth object of the present invention is to provide a controller.

[0008] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes an indoor unit of an air conditioner, the air conditioner also including an outdoor unit, the indoor unit including a power generation device, a control device and a fan; the power generation device is connected in the refrigerant circuit between the indoor unit and the outdoor unit, and is used to supply power to the control device under the action of the refrigerant flowing in the refrigerant circuit; the control device includes a controller, and the controller is used to establish a communication connection with the outdoor unit after the control device is powered on, and control the fan according to the operating information of the outdoor unit through the communication connection.

[0009] According to the indoor unit of the air conditioner of the embodiment of the present invention, a power generation device is provided to stably supply power to the controller in the indoor unit, so that the indoor unit has no power supply line and no strong power connection. This solves the problem that the power supply method using a power line requires a power connection line, is complicated to install, and requires a high-voltage conversion module, is easily damaged by lightning strikes and fluctuations in the mains power supply, and easily endangers the safety of personnel after the power line is damaged. At the same time, it also avoids the problem of electromagnetic radiation that exists in the wireless power supply method.

[0010] In addition, the indoor unit of the air conditioner according to the above embodiment of the present invention may also have the following additional technical features:

[0011] According to one embodiment of the present invention, before the controller controls the fan according to the operating information of the outdoor unit, the controller is also used to obtain the power supply voltage of the controller and determine that the power supply voltage is greater than a preset voltage threshold within a preset time after the control device is powered on.

[0012] According to one embodiment of the present invention, the controller is also used to: within a preset time after the control device is powered on, if the power supply voltage is less than or equal to the preset voltage threshold, control the outdoor unit to increase the operating frequency of the compressor through the communication connection until the power supply voltage is greater than the preset voltage threshold.

[0013] According to one embodiment of the present invention, the operating information of the outdoor unit includes the operating frequency of the compressor and the opening of the electronic expansion valve; the controller is specifically used to: determine the maximum output power of the fan according to the operating frequency and the opening, and control the fan according to the maximum output power.

[0014] According to one embodiment of the present invention, the power generation device includes a driving mechanism, a magnetic transmission mechanism and a power generation coil, and the power generation coil is physically isolated from the magnetic transmission mechanism; the driving mechanism is used to drive the magnetic transmission mechanism to rotate under the action of the flowing refrigerant, so that the power generation coil generates electrical energy.

[0015] According to one embodiment of the present invention, the control device further includes a rectifier unit and an energy storage unit, the AC end of the rectifier unit is connected to the generating coil, the DC end of the rectifier unit is connected to the energy storage unit, and the energy storage unit is connected to the controller to provide a power supply voltage to the controller.

[0016] According to one embodiment of the present invention, the refrigerant inlet of the power generation device is connected to the outlet of the compressor in the outdoor unit through a refrigerant pipeline, and the refrigerant outlet of the power generation device is connected to the inlet of the evaporator in the indoor unit through a refrigerant pipeline.

[0017] To achieve the above-mentioned object, a second embodiment of the present invention provides an air conditioner, which includes: an outdoor unit and an indoor unit of the air conditioner provided in the first embodiment of the present invention.

[0018] In addition, the air conditioner according to the above embodiment of the present invention may also have the following additional technical features:

[0019] According to one embodiment of the present invention, the air conditioner further includes: a remote controller for controlling the opening and closing of the outdoor unit.

[0020] To achieve the above-mentioned purpose, the third aspect of the present invention proposes a control method for an air conditioner, wherein the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes a power generation device and a fan, the power generation device is connected in a refrigerant circuit between the indoor unit and the outdoor unit, and is used to supply power to the indoor unit under the action of the refrigerant flowing in the refrigerant circuit; the method includes: after the indoor unit is powered on, establishing a communication connection with the outdoor unit; and controlling the fan according to the operating information of the outdoor unit through the communication connection.

[0021] In addition, the air conditioner control method according to the above embodiment of the present invention may also have the following additional technical features:

[0022] According to one embodiment of the present invention, before controlling the fan according to the operating information of the outdoor unit, the method also includes: obtaining the power supply voltage of the controller in the indoor unit, and determining that the power supply voltage is greater than a preset voltage threshold within a preset time after the indoor unit is powered on.

[0023] According to one embodiment of the present invention, the method further includes: within a preset time after the indoor unit is powered on, if the power supply voltage is less than or equal to the preset voltage threshold, controlling the outdoor unit to increase the operating frequency of the compressor through the communication connection until the power supply voltage is greater than the preset voltage threshold.

[0024] According to one embodiment of the present invention, the operating information of the outdoor unit includes the operating frequency of the compressor and the opening of the electronic expansion valve, and the controlling of the fan according to the operating information of the outdoor unit includes: determining the maximum output power of the fan according to the operating frequency and the opening, and controlling the fan according to the maximum output power.

[0025] To achieve the above objectives, the fourth aspect of the present invention proposes a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the air conditioner control method proposed in the third aspect of the present invention is implemented.

[0026] To achieve the above-mentioned purpose, the fifth aspect of the present invention proposes a controller, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the control method of the air conditioner proposed in the third aspect of the present invention is implemented.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of an indoor unit of an air conditioner according to an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of an indoor unit of an air conditioner according to a specific embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of an indoor unit of an air conditioner according to another specific embodiment of the present invention;

[0031] Figure 4 is a schematic diagram of a power generation device according to an embodiment of the present invention;

[0032] Figure 5 is a schematic diagram of a control device according to an embodiment of the present invention;

[0033] Figure 6 is a schematic diagram of an air conditioner according to an embodiment of the present invention;

[0034] Figure 7 is a flow chart of a method for controlling an air conditioner according to an embodiment of the present invention;

[0035] Figure 8 4 is a structural block diagram of a controller according to an embodiment of the present invention.

[0036] Explanation of reference numerals: 1000, air conditioner; 100, indoor unit; 200, outdoor unit; 300, remote controller; 10, power generating device; 20, control device; 30, fan; 40, evaporator; 11, driving mechanism; 12, magnetic transmission mechanism; 13, power generating coil; 21, rectifier unit; 22, energy storage unit; 23, controller. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] The indoor unit of the air conditioner, the air conditioner and the control method, medium and controller thereof according to the embodiment of the present invention are described in detail below in conjunction with the drawings and specific implementation methods of the specification.

[0039] Figure 1 FIG. 1 is a schematic diagram of an indoor unit of an air conditioner according to an embodiment of the present invention. Figure 1As shown, the air conditioner also includes an outdoor unit 200, and the indoor unit 100 of the air conditioner includes a power generation device 10, a control device 20 and a fan 30; the power generation device 10 is connected in the refrigerant circuit between the indoor unit 100 and the outdoor unit 200, and is used to supply power to the control device 20 under the action of the refrigerant flowing in the refrigerant circuit; the control device 20 includes a controller 23, and the controller 23 is used to establish a communication connection with the outdoor unit 200 after the control device 20 is powered, and control the fan 30 according to the operating information of the outdoor unit 200 through the communication connection.

[0040] In order to solve the problem of high voltage when the indoor unit 100 electric control adopts an external power line power supply method, and the electromagnetic radiation problem when the wireless power supply method is adopted, in the embodiment of the present invention, a power generation device 10 is arranged in the refrigerant circuit between the indoor unit 100 and the outdoor unit 200, and the flowing refrigerant in the refrigerant circuit drives the power generation device 10 to generate electricity, so as to power the controller 23 of the indoor unit 100.

[0041] It should be noted that Figure 1 The solid line connection between the outdoor unit 200, the power generation device 10 and the evaporator 40 is a refrigerant pipeline connection. The dotted line connection between the power generation device 10, the control device 20 and the fan 30 is an electrical connection.

[0042] In the embodiment of the present invention, the outdoor unit 200 is started to drive the refrigerant in the refrigerant circuit to flow so that the power generation device 10 generates electricity. Specifically, the compressor is started by starting the outdoor unit 200, and the operation of the compressor drives the refrigerant in the refrigerant circuit in a static state to flow. Under the action of the refrigerant flowing in the refrigerant circuit, the power generation device 10 generates electric energy and supplies power to the control device 20. After the control device 20 is powered, the controller 23 establishes a communication connection with the outdoor unit 200, obtains the operating information of the outdoor unit 200, and controls the fan 30 according to the operating information of the outdoor unit 200 to achieve control of the air conditioner.

[0043] In one embodiment of the present invention, the outdoor unit 200 can be started by a remote controller. The remote controller is wirelessly connected to the outdoor unit 200. When the air conditioner is started, a command to start the outdoor unit 200 is sent to the outdoor unit 200 through the remote controller to start the outdoor unit 200. When the air conditioner is turned off, a command to turn off the outdoor unit 200 is sent to the outdoor unit 200 through the remote controller to turn off the outdoor unit 200.

[0044] In the embodiment of the present invention, when the remote control and the outdoor unit 200 realize wireless communication, LoRa (Long Range Radio) spread spectrum technology can be used to realize ultra-high anti-interference and ultra-long-distance (strong wall penetration ability) wireless communication.

[0045] It should be noted that LoRa spread spectrum technology has strong anti-interference ability. The general GFSK (Gaussian Frequency Shift Keying) receiver requires a minimum signal-to-noise ratio (SNR) of 8dB to demodulate the signal, while the LoRa receiver only needs a minimum signal-to-noise ratio of -20dB to demodulate the signal. The demodulation signal-to-noise ratio difference between GFSK modulation and LoRa modulation is 28dB. The highest sensitivity is up to -137dBm. At the same time, LoRa spread spectrum technology has the characteristics of ultra-low power consumption. Specifically, the wireless transmission transient current is 5.8mA, the standby mode is 0.85μA, and the shutdown current is 150nA (wake up when an external event occurs).

[0046] In the embodiment of the present invention, the remote controller, the indoor unit 100 and the outdoor unit 200 are wirelessly connected. Specifically, the remote controller directly realizes wireless communication with the outdoor unit 200 to control the opening and closing of the outdoor unit 200. After the indoor unit 100 is turned on, the compressor starts to drive the refrigerant to flow, and the flowing refrigerant drives the power generation device 10 of the indoor unit 100 to generate electricity to power the controller 23 in the indoor unit 100. After the controller 23 in the indoor unit 100 is started, it communicates with the outdoor unit 200 by wireless communication, and realizes wireless communication connection with the outdoor unit 200.

[0047] It should be noted that, when controlling the outdoor unit 200 to be turned on and off, a mobile phone, a smart speaker or other smart electronic device can be used to establish wireless communication with the outdoor unit 200 to control the outdoor unit 200 to be turned on and off. The embodiment of the present invention does not limit the method of turning on and off the outdoor unit 200.

[0048] In order to ensure stable operation of the air conditioner, when it is determined that the power supply voltage of the controller 23 is greater than the preset voltage threshold after the control device 20 is powered on, the controller 23 controls the fan 30 according to the operation information of the outdoor unit 200. In order to avoid that the electric control startup time of the indoor unit 100 is too long and affects the user's experience, when it is determined that the power supply voltage is still less than or equal to the preset voltage threshold within the preset time after the control device 20 is powered on, the outdoor unit 200 is controlled to increase the operating frequency of the compressor so that the power supply voltage of the control device 20 can quickly exceed the preset voltage threshold.

[0049] In one embodiment of the present invention, before controlling the fan 30 according to the operating information of the outdoor unit 200, the controller 23 can also be used to obtain the power supply voltage of the controller 23 and determine that the power supply voltage is greater than a preset voltage threshold within a preset time after the control device 20 is powered on.

[0050] Specifically, Figure 2As shown, in order to make the air conditioner run stably, the outdoor unit 200 is started to make the power generation device 10 generate electricity. After the control device 20 is powered, the controller 23 obtains its power supply voltage and determines whether the power supply voltage is greater than the preset voltage threshold. If the power supply voltage of the controller 23 is greater than the preset voltage threshold, the controller 23 is started. The controller 23 after startup communicates with the outdoor unit 200, obtains the operation information of the outdoor unit 200, and controls the fan 30 according to the operation information of the outdoor unit 200. If the obtained power supply voltage of the controller 23 is less than the preset voltage threshold, the control device 20 is waited for to continue to store the electric energy generated by the power generation device 10. When the power supply voltage of the controller 23 is greater than the preset voltage threshold, the controller 23 is started.

[0051] It should be noted that the time for waiting for the control device 20 to continue to store the electric energy generated by the power generation device 10 cannot exceed the preset time. For better effect, within the preset time, the controller 23 can obtain its power supply voltage multiple times to establish communication with the outdoor unit 200 in time when its power supply voltage is greater than the preset voltage threshold.

[0052] In one embodiment of the present invention, the controller 23 can also be used to: within a preset time after the control device 20 is powered on, if the power supply voltage is less than or equal to a preset voltage threshold, increase the operating frequency of the compressor by controlling the outdoor unit 200 through a communication connection until the power supply voltage is greater than the preset voltage threshold.

[0053] Specifically, Figure 2 As shown, in order to avoid the electric control startup time of the indoor unit 100 being too long. After waiting for the preset time, the power supply voltage of the controller 23 is still less than or equal to the preset voltage threshold, and the controller 23 communicates with the outdoor unit 200 to control the outdoor unit 200 through the controller 23 to increase the operating frequency of the compressor and increase the flow rate of the refrigerant in the refrigerant circuit, so that the power generation device 10 generates more electric energy, and the control device 20 stores more electric energy, so that the power supply voltage of the controller 23 can quickly exceed the preset voltage threshold. When the power supply voltage of the controller 23 is greater than the preset voltage threshold, the operation information of the outdoor unit 200 is obtained, and the fan 30 is controlled according to the operation information of the outdoor unit 200.

[0054] The preset time and the preset voltage threshold in the embodiment of the present invention can be set according to actual needs. The embodiment of the present invention does not limit the values ​​of the preset time and the preset voltage threshold.

[0055] Since the indoor unit 100 fails to establish communication with the outdoor unit 200, the air conditioner cannot be controlled. The embodiment of the present invention reminds the user when the indoor unit 100 fails to establish communication with the outdoor unit 200, so that the air conditioner can be repaired in time and the communication connection between the indoor unit 100 and the outdoor unit 200 can be restored.

[0056] In an embodiment of the present invention, if the indoor unit 100 fails to establish communication with the outdoor unit 200, the outdoor unit 200 is controlled to send communication failure information to the remote controller to remind the user that the indoor unit 100 fails to establish communication with the outdoor unit 200.

[0057] Specifically, Figure 3 As shown, the indoor unit 100 establishes wireless communication with the outdoor unit 200 after being powered on and awakened. If the indoor unit 100 fails to establish communication with the outdoor unit 200, the outdoor unit 200 is controlled to send fault information to a remote control or smart electronic device such as a mobile phone or smart speaker to promptly remind the user of the current fault. If the indoor unit 100 successfully establishes communication with the outdoor unit 200, it can be determined whether the power supply voltage of the controller 23 is greater than the preset voltage threshold. When the power supply voltage of the controller 23 is greater than the preset voltage threshold, the fan 30 is controlled according to the operating information of the outdoor unit 200 to improve the stability of the air conditioner operation.

[0058] In one embodiment of the present invention, the operating information of the outdoor unit 200 includes the operating frequency of the compressor and the opening of the electronic expansion valve; the controller 23 can be specifically used to: determine the maximum output power of the fan 30 according to the operating frequency and the opening, and control the fan 30 according to the maximum output power.

[0059] Specifically, after the controller 23 is started, it wirelessly communicates with the outdoor unit 200 to obtain the operating frequency of the compressor and the opening of the electronic expansion valve in the outdoor unit 200. The power generation power P of the power generation device 10 is calculated according to the operating frequency of the compressor and the opening of the electronic expansion valve, and the current maximum output power of the fan 30 is calculated according to the calculated power generation power P. The operating frequency of the compressor and the opening of the electronic expansion valve are adjusted according to the current maximum output power of the fan 30, so that the current maximum output power of the fan 30 reaches the target maximum output power, thereby controlling the fan 30.

[0060] It should be noted that the power generation power P of the power generation device 10 is related to the operating frequency of the compressor and the opening of the electronic expansion valve as well as the generator conversion efficiency δ and the rated displacement C of the compressor.

[0061] In the embodiment of the present invention, the power generation P of the power generation device 10 is positively correlated with the generator conversion efficiency δ, the opening degree θ of the electronic expansion valve, the operating frequency f of the compressor, and the rated displacement C of the compressor. That is:

[0062] P∝δ*θ*f*C

[0063] Among them, P represents the power generated by the generator, δ represents the conversion efficiency of the generator, θ represents the opening of the electronic expansion valve (which affects the system pressure and flow), f represents the operating frequency of the compressor, and C represents the rated displacement of the compressor.

[0064] Specifically, when calculating the current power generation P of the power generation device 10, the current generator conversion efficiency, the current opening of the electronic expansion valve, the current operating frequency of the compressor, and the current rated displacement of the compressor are obtained. The current power generation P of the power generation device 10 is calculated based on the current generator conversion efficiency, the current opening of the electronic expansion valve, the current operating frequency of the compressor, and the current rated displacement of the compressor.

[0065] The power generation device 10 in the embodiment of the present invention is a refrigerant driven power generation device.

[0066] In a feasible embodiment of the present invention, Figure 4 As shown, the power generation device 10 may include a driving mechanism 11, a magnetic transmission mechanism 12 and a power generation coil 13, and the power generation coil 13 is physically isolated from the magnetic transmission mechanism 12; the driving mechanism 11 is used to drive the magnetic transmission mechanism 12 to rotate under the action of the flowing refrigerant, so that the power generation coil 13 generates electrical energy.

[0067] To avoid refrigerant leakage, the power generation device 10 in the embodiment of the present invention adopts magnetic isolation. Specifically, the refrigerant drive mechanism 11 and the magnetic attraction transmission mechanism 12 are encapsulated in the refrigerant pipeline system component, and a power generation coil 13 is arranged outside the refrigerant pipeline system component at the position of the power generation magnet at one end of the magnetic attraction transmission mechanism 12, see Figure 4 The physical isolation between the power generation coil 13 and the power generation magnet can effectively prevent the refrigerant from leaking.

[0068] Specifically, the outdoor unit 200 starts to drive the refrigerant in the refrigerant circuit to flow, the flowing refrigerant drives the driving mechanism 11 to rotate, the rotating refrigerant driving mechanism 11 drives the magnetic transmission mechanism 12 to rotate, and the rotation of the magnetic transmission mechanism 12 drives the power generation magnet at one end of the magnetic transmission mechanism 12 to rotate. Under the action of the rotating power generation magnet, the power generation coil 13 continuously cuts the electromagnetic field to generate electrical energy, thereby realizing the refrigerant power generation of the power generation device 10. Figure 4 The wires extending from the middle generating coil 13 are connected to the control device 20 .

[0069] In a feasible embodiment of the present invention, the power generation device 10 includes a driving mechanism 11 and a micro generator.

[0070] Specifically, the outdoor unit 200 starts to drive the refrigerant in the refrigerant circuit to flow, the flowing refrigerant drives the driving mechanism 11 to rotate, and the rotating driving mechanism 11 drives the micro generator to generate electricity. The micro generator generates electricity to supply power to the control device 20.

[0071] In one embodiment of the present invention, Figure 5As shown, the control device 20 also includes a rectifier 21 and an energy storage unit 22. The AC end of the rectifier 21 is connected to the generating coil 13, the DC end of the rectifier 21 is connected to the energy storage unit 22, and the energy storage unit 22 is connected to the controller 23 to provide a power supply voltage to the controller 23.

[0072] Specifically, after the power generation device 10 generates electric energy, it supplies power to the control device 20. In order to avoid the pulsation of the refrigerant flow and the incoherence of the power generation device 10, the power supply voltage provided to the controller 23 is unstable. In the control device 20 of the embodiment of the present invention, a rectifier 21 for stabilizing the voltage and an energy storage unit 22 for storing electric energy are provided. When the power generation device 10 is started, the electric energy generated by the power generation device 10 passes through the rectifier 21. The rectifier 21 reduces the fluctuation of the output voltage of the power generation device 10 and improves the stability of the output voltage of the power generation device 10. The voltage after voltage stabilization charges the energy storage unit 22. When the voltage of the energy storage unit 22 reaches the preset voltage threshold, the controller 23 starts, obtains the operation information of the outdoor unit 200, and controls the fan 30 according to the operation information of the outdoor unit 200.

[0073] In a specific embodiment, Figure 5 As shown, the first end of the rectifier unit 21 is connected to one end of the power generation coil 13, the second end of the rectifier unit 21 is connected to the other end of the power generation coil 13, the third end of the rectifier unit 21 is connected to one end of the energy storage unit 22, and the fourth end of the rectifier unit 21 is connected to the other end of the energy storage unit 22.

[0074] In this embodiment, if Figure 5 As shown, the rectifier 21 may include four diodes, namely a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, wherein the anode of the first diode D1 is connected to the first end of the rectifier 21, the cathode of the first diode D1 is connected to the third end of the rectifier 21, the anode of the second diode D2 is connected to the second end of the rectifier 21, the cathode of the second diode D2 is connected to the third end of the rectifier 21, the cathode of the third diode D3 is connected to the first end of the rectifier 21, the anode of the third diode D3 is connected to the fourth end of the rectifier 21, the cathode of the fourth diode D4 is connected to the second end of the rectifier 21, and the anode of the fourth diode D4 is connected to the fourth end of the rectifier 21.

[0075] In a specific embodiment, the energy storage unit 22 may include a farad capacitor, an energy storage battery, etc. The embodiment of the present invention does not limit the structure of the energy storage unit 22 .

[0076] In one embodiment of the present invention, the refrigerant inlet of the power generation device 10 is connected to the outlet of the compressor in the outdoor unit 200 through a refrigerant pipeline, and the refrigerant outlet of the power generation device 10 is connected to the inlet of the evaporator 40 in the indoor unit 100 through a refrigerant pipeline.

[0077] It should be noted that the refrigerant circuit includes a high-pressure refrigerant circuit and a low-pressure refrigerant circuit. One end of the high-pressure refrigerant circuit is connected to the outlet of the compressor in the outdoor unit 200, and the other end is connected to the inlet of the evaporator 40 in the indoor unit 100. One end of the low-pressure refrigerant circuit is connected to the outlet of the evaporator 40 in the indoor unit 100, and the other end is connected to the inlet of the compressor in the outdoor unit 200.

[0078] Specifically, Figure 4 The arrow in the power generation device 10 shows the flow direction of the refrigerant in the power generation device 10. In this embodiment, the refrigerant inlet of the power generation device 10 is connected to the outlet of the compressor through the refrigerant pipeline, and the refrigerant outlet is connected to the inlet of the evaporator 40 through the refrigerant pipeline. That is, this embodiment sets the power generation device 10 on the high-pressure refrigerant circuit. Since the refrigerant in the high-pressure refrigerant pipeline is under high pressure, the refrigerant is compressed, the flow resistance is small, and the flow rate is fast, while the refrigerant in the low-pressure refrigerant pipeline is under lower pressure, and the flow rate is relatively slow. Setting the refrigerant-driven power generation device 10 on the high-pressure refrigerant circuit can improve the driving effect of the power generation device 10.

[0079] It should be noted that the embodiment of the present invention does not limit the position of the power generation device 10. The power generation device 10 can be arranged in a high-pressure refrigerant circuit or a low-pressure refrigerant circuit as required.

[0080] The indoor unit of the air conditioner of the embodiment of the present invention provides a power generating device to stably supply power to the controller in the indoor unit, so that the indoor unit has no power supply line and no strong power connection. This solves the problem that the power supply method using a power line requires a power connection line, is complicated to install, and requires a high-voltage conversion module, is easily damaged by lightning strikes and fluctuations in the mains power supply, and easily endangers the safety of personnel after the power line is damaged. At the same time, it also avoids the problem of electromagnetic radiation that exists in the wireless power supply method.

[0081] The invention provides an air conditioner.

[0082] Figure 6 Schematic diagram of an air conditioner according to an embodiment of the present invention. Figure 6 As shown, the air conditioner 1000 includes: an outdoor unit 200, and the indoor unit 100 of the air conditioner 1000 as described above.

[0083] The indoor unit 100 in the embodiment of the present invention includes a power generation device 10, a control device 20 and a fan 30. The power generation device 10 is connected to the refrigerant circuit between the indoor unit 100 and the outdoor unit 200, and is used to supply power to the control device 20 under the action of the refrigerant flowing in the refrigerant circuit; the control device 20 includes a controller 23, and the controller 23 is used to establish a communication connection with the outdoor unit 200 after the control device 20 is powered, and control the fan 30 according to the operation information of the outdoor unit 200 through the communication connection.

[0084] In order to solve the problem of high voltage when the indoor unit 100 electric control adopts an external power line power supply method, and the electromagnetic radiation problem when the wireless power supply method is adopted, in the embodiment of the present invention, a power generation device 10 is arranged in the refrigerant circuit between the indoor unit 100 and the outdoor unit 200, and the flowing refrigerant in the refrigerant circuit drives the power generation device 10 to generate electricity, so as to power the controller 23 of the indoor unit 100.

[0085] In the embodiment of the present invention, the outdoor unit 200 is started to drive the refrigerant in the refrigerant circuit to flow so that the power generation device 10 generates electricity. Specifically, the compressor is started by starting the outdoor unit 100, and the operation of the compressor drives the refrigerant in the refrigerant circuit in a static state to flow. Under the action of the refrigerant flowing in the refrigerant circuit, the power generation device 10 generates electric energy and supplies power to the control device 20. After the control device 20 is powered, the controller 23 establishes a communication connection with the outdoor unit 200, obtains the operating information of the outdoor unit 200, and controls the fan 30 according to the operating information of the outdoor unit 200, so as to realize the heat exchange of the evaporator 40 in the indoor unit 100.

[0086] The power generation device 10 in the embodiment of the present invention is a refrigerant driven power generation device.

[0087] In one embodiment of the present invention, Figure 4 As shown, the power generation device 10 may include a driving mechanism 11, a magnetic transmission mechanism 12 and a power generation coil 13, and the power generation coil 13 is physically isolated from the magnetic transmission mechanism 12; the driving mechanism 11 is used to drive the magnetic transmission mechanism 12 to rotate under the action of the flowing refrigerant, so that the power generation coil 13 generates electrical energy.

[0088] In one embodiment of the present invention, Figure 5 As shown, the control device 20 also includes a rectifier 21 and an energy storage unit 22. The AC end of the rectifier 21 is connected to the generating coil 13, the DC end of the rectifier 21 is connected to the energy storage unit 22, and the energy storage unit 22 is connected to the controller 23 to provide a power supply voltage to the controller 23.

[0089] In order to ensure stable operation of the air conditioner, when it is determined that the power supply voltage of the controller 23 is greater than the preset voltage threshold after the control device 20 is powered on, the controller 23 controls the fan 30 according to the operation information of the outdoor unit 200. In order to avoid that the electric control startup time of the indoor unit 100 is too long and affects the user's experience, when it is determined that the power supply voltage is still less than or equal to the preset voltage threshold within the preset time after the control device 20 is powered on, the outdoor unit 200 is controlled to increase the operating frequency of the compressor so that the power supply voltage of the control device 20 can quickly exceed the preset voltage threshold.

[0090] Since the indoor unit 100 fails to establish communication with the outdoor unit 200, the air conditioner cannot be controlled. The embodiment of the present invention reminds the user when the indoor unit 100 fails to establish communication with the outdoor unit 200, so that the air conditioner can be repaired in time and the communication connection between the indoor unit 100 and the outdoor unit 200 can be restored.

[0091] In one embodiment of the present invention, Figure 6 As shown, the air conditioner 1000 further includes: a remote controller 300 for controlling the opening and closing of the outdoor unit 200.

[0092] In an embodiment of the present invention, the remote controller 300 directly realizes wireless communication with the outdoor unit 200, and LoRa (Long Range Radio) spread spectrum technology can be used to realize ultra-high anti-interference and ultra-long-distance (strong wall penetration ability) wireless communication.

[0093] It should be noted that LoRa spread spectrum technology has strong anti-interference ability. The general GFSK (Gaussian Frequency Shift Keying) receiver requires a minimum signal-to-noise ratio (SNR) of 8dB to demodulate the signal, while the LoRa receiver only needs a minimum signal-to-noise ratio of -20dB to demodulate the signal. The demodulation signal-to-noise ratio difference between GFSK modulation and LoRa modulation is 28dB. The highest sensitivity is up to -137dBm. At the same time, LoRa spread spectrum technology has the characteristics of ultra-low power consumption. Specifically, the wireless transmission transient current is 5.8mA, the standby mode is 0.85μA, and the shutdown current is 150nA (wake up when an external event occurs).

[0094] In an embodiment of the present invention, the remote controller 300, the indoor unit 100 and the outdoor unit 200 are wirelessly connected. Specifically, the remote controller 300 directly communicates wirelessly with the outdoor unit 200 to control the opening and closing of the outdoor unit 200. After the indoor unit 100 is turned on, the compressor starts to drive the refrigerant to flow, and the flowing refrigerant drives the power generation device 10 of the indoor unit 100 to generate electricity to power the controller in the indoor unit 100. After the controller 23 in the indoor unit 100 is started, it communicates with the outdoor unit 200 by wireless communication, and realizes wireless communication connection with the outdoor unit 200.

[0095] It should be noted that, when controlling the outdoor unit 200 to be turned on and off, a mobile phone, a smart speaker or other smart electronic device can be used to establish wireless communication with the outdoor unit 200 to control the outdoor unit 200 to be turned on and off. The embodiment of the present invention does not limit the method of turning on and off the outdoor unit 200.

[0096] The indoor unit of the air conditioner in the embodiment of the present invention provides a stable power supply to the controller in the indoor unit by setting a power generation device, so that the indoor unit has no power supply line and no strong power connection. The problem of using a power line power supply method, which requires a power connection line, is complicated to install, and requires a high-voltage conversion module, is easily damaged by lightning strikes and fluctuations in the mains power, and easily endangers the safety of personnel after the power line is damaged, is solved. At the same time, the electromagnetic radiation problem existing in the wireless power supply method is also avoided.

[0097] The invention provides a control method for an air conditioner.

[0098] The air conditioner in the embodiment of the present invention may include an indoor unit and an outdoor unit. The indoor unit may include a power generation device and a fan. The power generation device is connected in the refrigerant circuit between the indoor unit and the outdoor unit, and is used to supply power to the indoor unit under the action of the flowing refrigerant in the refrigerant circuit.

[0099] Specifically, a power generation device is provided in the refrigerant circuit between the indoor unit and the outdoor unit, and the flowing refrigerant in the refrigerant circuit is used to drive the power generation device to generate electricity to supply power to the controller in the indoor unit.

[0100] The power generation device in the embodiment of the present invention may be a refrigerant driven power generation device.

[0101] In a specific embodiment of the present invention, the power generation device may include a driving mechanism, a magnetic transmission mechanism and a power generation coil, and the power generation coil is physically isolated from the magnetic transmission mechanism; the driving mechanism is used to drive the magnetic transmission mechanism to rotate under the action of the flowing refrigerant, so that the power generation coil generates electrical energy.

[0102] In one embodiment of the present invention, the indoor unit may further include a control device. The control device also includes a rectifier and an energy storage unit, wherein the AC end of the rectifier is connected to the generator coil, the DC end of the rectifier is connected to the energy storage unit, and the energy storage unit is connected to the controller in the indoor unit to provide a power supply voltage to the controller.

[0103] Figure 7 FIG. 1 is a flow chart of a method for controlling an air conditioner according to an embodiment of the present invention. Figure 7 As shown, the control method of the air conditioner may include:

[0104] S101, after the indoor unit is powered on, a communication connection is established with the outdoor unit;

[0105] S102, controlling the fan according to the operation information of the outdoor unit through the communication connection.

[0106] Specifically, by starting the outdoor unit, the compressor in the outdoor unit is started, so that the refrigerant in the refrigerant circuit in a static state flows. Under the action of the refrigerant flowing in the refrigerant circuit, the power generation device generates electric energy to supply power to the indoor unit, so that the indoor unit is powered on and awakened. After the indoor unit is powered on and awakened, the indoor unit establishes a wireless communication connection with the outdoor unit, obtains the operating information of the outdoor unit through the wireless communication connection, and controls the fan according to the operating information of the outdoor unit.

[0107] In one embodiment of the present invention, the outdoor unit can be started by a remote controller. The remote controller is wirelessly connected to the outdoor unit. When the air conditioner is started, a start command of the outdoor unit is sent to the outdoor unit through the remote controller to start the outdoor unit. When the air conditioner is turned off, a turn-off command of the outdoor unit is sent to the outdoor unit through the remote controller to turn off the outdoor unit.

[0108] In an embodiment of the present invention, when the remote control realizes wireless communication with the outdoor unit, LoRa spread spectrum technology can be used to realize ultra-high anti-interference and ultra-long-distance (strong wall penetration ability) wireless communication.

[0109] It should be noted that LoRa spread spectrum technology has strong anti-interference ability. The general GFSK (Gaussian Frequency Shift Keying) receiver requires a minimum signal-to-noise ratio (SNR) of 8dB to demodulate the signal, while the LoRa receiver only needs a minimum signal-to-noise ratio of -20dB to demodulate the signal. The demodulation signal-to-noise ratio difference between GFSK modulation and LoRa modulation is 28dB. The highest sensitivity is up to -137dBm. At the same time, LoRa spread spectrum technology has the characteristics of ultra-low power consumption. Specifically, the wireless transmission transient current is 5.8mA, the standby mode is 0.85μA, and the shutdown current is 150nA (wake up when an external event occurs).

[0110] It should be noted that, when controlling the opening and closing of the outdoor unit, a mobile phone, a smart speaker or other smart electronic device can be used to establish wireless communication with the outdoor unit to control the opening and closing of the outdoor unit. The embodiment of the present invention does not limit the method of opening and closing the outdoor unit.

[0111] Since the indoor unit and the outdoor unit fail to establish communication, the air conditioner cannot be controlled. The embodiment of the present invention reminds the user when the indoor unit and the outdoor unit fail to establish communication, so as to remind the user to repair the air conditioner in time and restore the communication connection between the indoor unit and the outdoor unit.

[0112] Specifically, the indoor unit is powered on and wakes up to establish wireless communication with the outdoor unit. If the indoor unit fails to establish communication with the outdoor unit, the outdoor unit is controlled to send fault information to a remote control or smart electronic device such as a mobile phone or smart speaker to promptly remind the user of the current fault.

[0113] To ensure stable operation of the air conditioner, when the power supply voltage of the controller in the indoor unit is greater than the preset voltage threshold, the controller is started to establish communication with the outdoor unit. To avoid the indoor unit's electric control startup time being too long, which affects the user's experience, when it is determined that the power supply voltage of the controller is still less than or equal to the preset voltage threshold within a preset time after the indoor unit is powered on, the outdoor unit is controlled to increase the operating frequency of the compressor so that the power supply voltage of the control device is greater than the preset voltage threshold.

[0114] In one embodiment of the present invention, before controlling the fan according to the operation information of the outdoor unit, the control method of the air conditioner further includes:

[0115] The power supply voltage of the controller in the indoor unit is obtained, and it is determined that the power supply voltage is greater than a preset voltage threshold within a preset time after the indoor unit is powered on.

[0116] Specifically, in order to ensure stable operation of the air conditioner, after the indoor unit and the outdoor unit successfully establish communication, the power supply voltage of the indoor unit is obtained, and it is determined whether the power supply voltage is greater than a preset voltage threshold. If the power supply voltage of the indoor unit is greater than the preset voltage threshold, the operation information of the outdoor unit is obtained, and the fan is controlled according to the operation information of the outdoor unit. If the obtained power supply voltage of the indoor unit is less than the preset voltage threshold, the power generation device is waited to continue to generate electricity to power the indoor unit.

[0117] It should be noted that the time for waiting for the power generation device to continue to generate electricity cannot exceed the preset time. For better effect, within the preset time, the controller can obtain its power supply voltage multiple times to establish communication with the outdoor unit in time when its power supply voltage is greater than the preset voltage threshold.

[0118] In one embodiment of the present invention, the method for controlling an air conditioner may further include:

[0119] Within a preset time after the indoor unit is powered on, if the power supply voltage is less than or equal to the preset voltage threshold, the outdoor unit is controlled through the communication connection to increase the operating frequency of the compressor until the power supply voltage is greater than the preset voltage threshold.

[0120] Specifically, to avoid the indoor unit's electronically controlled startup time being too long, when the waiting time exceeds the preset time and the power supply voltage of the indoor unit is still less than or equal to the preset voltage threshold, the indoor unit communicates with the outdoor unit and controls the outdoor unit to increase the operating frequency of the compressor so that the power generation device generates more electric energy, so that the power supply voltage of the indoor unit can quickly exceed the preset voltage threshold. When the power supply voltage of the indoor unit is greater than the preset voltage threshold, the operating information of the outdoor unit is obtained, and the fan is controlled according to the operating information of the outdoor unit.

[0121] The preset time and the preset voltage threshold in the embodiment of the present invention can be set according to actual needs. The embodiment of the present invention does not limit the values ​​of the preset time and the preset voltage threshold.

[0122] In one embodiment of the present invention, Figure 6 As shown, the operation information of the outdoor unit includes the operation frequency of the compressor and the opening degree of the electronic expansion valve. Controlling the fan according to the operation information of the outdoor unit may include:

[0123] The maximum output power of the fan is determined according to the operating frequency and the opening, and the fan is controlled according to the maximum output power.

[0124] Specifically, the indoor unit is powered on and wakes up, successfully establishes communication with the outdoor unit, and obtains the operating frequency of the compressor in the outdoor unit and the opening of the electronic expansion valve. According to the operating frequency of the compressor and the opening of the electronic expansion valve, the power generation power P of the power generation device is calculated, and the current maximum output power of the fan is calculated according to the calculated power generation power P. According to the current maximum output power of the fan, the operating frequency of the compressor and the opening of the electronic expansion valve are adjusted to control the fan so that the current maximum output power of the fan reaches the target maximum output power.

[0125] It should be noted that the power generation power P of the power generation device is related to the operating frequency of the compressor and the opening of the electronic expansion valve, as well as the generator conversion efficiency δ and the rated displacement C of the compressor.

[0126] In the embodiment of the present invention, the power generation power P of the power generation device is positively correlated with the generator conversion efficiency δ, the opening degree θ of the electronic expansion valve, the operating frequency f of the compressor, and the rated displacement C of the compressor. That is:

[0127] P∝δ*θ*f*C

[0128] Among them, P represents the power generated by the generator, δ represents the conversion efficiency of the generator, θ represents the opening of the electronic expansion valve (which affects the system pressure and flow), f represents the operating frequency of the compressor, and C represents the rated displacement of the compressor.

[0129] Specifically, when calculating the current power generation P of the power generation device, the current generator conversion efficiency, the current electronic expansion valve opening, the current compressor operating frequency and the current compressor rated displacement are obtained. The current power generation P of the power generation device is calculated based on the current generator conversion efficiency, the current electronic expansion valve opening, the current compressor operating frequency and the current compressor rated displacement.

[0130] The control method of the air conditioner according to the embodiment of the present invention is used for an air conditioner having an indoor unit without a power supply line and a strong power connection, so as to realize the control of the air conditioner.

[0131] The control method of the air conditioner in the embodiment of the present invention establishes wireless communication with the outdoor unit after the indoor unit is powered on, obtains the operating information of the outdoor unit through wireless communication, controls the fan according to the operating information of the outdoor unit, and realizes the control of the air conditioner.

[0132] The present invention provides a computer-readable storage medium.

[0133] In this embodiment, a computer program is stored on a computer-readable storage medium, and when the computer program is executed by a processor, the control method of the air conditioner as described above is implemented.

[0134] The invention provides a controller.

[0135] In this embodiment, the controller may include a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the control method of the air conditioner as described above is implemented.

[0136] Figure 8 4 is a structural block diagram of a controller according to an embodiment of the present invention.

[0137] like Figure 8 As shown, the controller 500 includes: a processor 501 and a memory 503. The processor 501 and the memory 503 are connected, such as through a bus 502. Optionally, the controller 500 may also include a transceiver 504. It should be noted that in actual applications, the transceiver 504 is not limited to one, and the structure of the controller 500 does not constitute a limitation on the embodiments of the present invention.

[0138] Processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of the present invention. Processor 501 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0139] The bus 502 may include a path to transmit information between the above components. The bus 502 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 502 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0140] The memory 503 is used to store a computer program corresponding to the air conditioner control method of the above embodiment of the present invention, and the computer program is controlled and executed by the processor 501. The processor 501 is used to execute the computer program stored in the memory 503 to implement the contents shown in the above method embodiment. Figure 8 The controller 500 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0141] The computer-readable storage medium and the controller of the embodiments of the present invention can be used for an air conditioner having an indoor unit without a power supply line and a strong power connection to realize control of the air conditioner.

[0142] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0143] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0144] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0145] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0146] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0147] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0148] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0149] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An indoor unit of an air conditioner, characterized in that: The air conditioner also includes an outdoor unit, and the indoor unit includes a power generation device, a control device and a fan; The power generation device is connected in the refrigerant circuit between the indoor unit and the outdoor unit, and is used to supply power to the control device under the action of the refrigerant flowing in the refrigerant circuit; The control device includes a controller, which is used to establish a communication connection with the outdoor unit after the control device is powered on, and control the fan according to the operating information of the outdoor unit through the communication connection.

2. The indoor unit of the air conditioner according to claim 1, characterized in that: Before the controller controls the fan according to the operation information of the outdoor unit, the controller is also used to obtain the power supply voltage of the controller and determine that the power supply voltage is greater than a preset voltage threshold within a preset time after the control device is powered on.

3. The indoor unit of the air conditioner according to claim 2, characterized in that: The controller is also used for: Within a preset time after the control device is powered on, if the power supply voltage is less than or equal to the preset voltage threshold, the outdoor unit is controlled through the communication connection to increase the operating frequency of the compressor until the power supply voltage is greater than the preset voltage threshold.

4. The indoor unit of the air conditioner according to any one of claims 1 to 3, characterized in that: The operation information of the outdoor unit includes the operation frequency of the compressor and the opening degree of the electronic expansion valve; the controller is specifically used for: The maximum output power of the fan is determined according to the operating frequency and the opening degree, and the fan is controlled according to the maximum output power.

5. The indoor unit of the air conditioner according to claim 1, characterized in that: The power generation device comprises a driving mechanism, a magnetic transmission mechanism and a power generation coil, and the power generation coil is physically isolated from the magnetic transmission mechanism; The driving mechanism is used to drive the magnetic transmission mechanism to rotate under the action of the flowing refrigerant, so that the generating coil generates electrical energy.

6. The indoor unit of the air conditioner according to claim 1, characterized in that: The control device also includes a rectifier and an energy storage unit, wherein the AC end of the rectifier is connected to the generating coil, the DC end of the rectifier is connected to the energy storage unit, and the energy storage unit is connected to the controller to provide a power supply voltage to the controller.

7. The indoor unit of the air conditioner according to claim 1, characterized in that: The refrigerant inlet of the power generation device is connected to the outlet of the compressor in the outdoor unit through a refrigerant pipeline, and the refrigerant outlet of the power generation device is connected to the inlet of the evaporator in the indoor unit through a refrigerant pipeline.

8. An air conditioner, characterized in that: The air conditioner comprises: an outdoor unit, and an indoor unit of the air conditioner according to any one of claims 1-7.

9. The air conditioner according to claim 8, characterized in that: The air conditioner further comprises: A remote controller is used to control the opening and closing of the outdoor unit.

10. A method for controlling an air conditioner, characterized in that: The air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises a power generation device and a fan, the power generation device is connected in a refrigerant circuit between the indoor unit and the outdoor unit, and is used to supply power to the indoor unit under the action of a refrigerant flowing in the refrigerant circuit; the method comprises: After the indoor unit is powered, a communication connection is established with the outdoor unit; The fan is controlled according to the operating information of the outdoor unit through the communication connection.

11. The air conditioner control method according to claim 10, characterized in that: Before controlling the fan according to the operation information of the outdoor unit, the method further includes: The power supply voltage of the controller in the indoor unit is obtained, and it is determined that the power supply voltage is greater than a preset voltage threshold within a preset time after the indoor unit is powered on.

12. The air conditioner control method according to claim 11, characterized in that: The method further comprises: Within a preset time after the indoor unit is powered on, if the power supply voltage is less than or equal to the preset voltage threshold, the outdoor unit is controlled through the communication connection to increase the operating frequency of the compressor until the power supply voltage is greater than the preset voltage threshold.

13. The air conditioner control method according to any one of claims 10 to 12, characterized in that: The operation information of the outdoor unit includes the operation frequency of the compressor and the opening degree of the electronic expansion valve, and the controlling the fan according to the operation information of the outdoor unit includes: The maximum output power of the fan is determined according to the operating frequency and the opening degree, and the fan is controlled according to the maximum output power.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the air conditioner control method according to any one of claims 10 to 13 is implemented.

15. A controller, comprising a memory and a processor, wherein a computer program is stored in the memory, characterized in that: When the computer program is executed by the processor, the air conditioner control method according to any one of claims 10 to 13 is implemented.

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