CN116293937A - Air conditioner and communication control method thereof - Google Patents

Air conditioner and communication control method thereof Download PDF

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Publication number
CN116293937A
CN116293937A CN202310344841.3A CN202310344841A CN116293937A CN 116293937 A CN116293937 A CN 116293937A CN 202310344841 A CN202310344841 A CN 202310344841A CN 116293937 A CN116293937 A CN 116293937A
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China
Prior art keywords
signal
interface
control signal
air conditioner
communication
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Pending
Application number
CN202310344841.3A
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Chinese (zh)
Inventor
葛甜
刘思聪
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Hisense Air Conditioning Co Ltd
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Hisense Air Conditioning Co Ltd
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Priority to CN202310344841.3A priority Critical patent/CN116293937A/en
Publication of CN116293937A publication Critical patent/CN116293937A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56—Remote control
    • F24F11/58—Remote control using Internet communication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner and a communication control method thereof, wherein the air conditioner comprises an indoor unit, an outdoor unit, a communication switching device and a controller, wherein the communication switching device comprises a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit and a micro control unit; the first interface is connected with a wire controller interface of the indoor unit, and the second interface is connected with a temperature controller; the controller is configured to convert a switching signal sent by the temperature controller into a first control signal through the signal conversion circuit and send the first control signal to the micro-control unit; converting the first control signal into a second control signal through the micro control unit and sending the second control signal to the communication circuit of the wire controller; the wire controller communication circuit sends a second control signal to the indoor unit so that the indoor unit executes a corresponding control instruction. The invention can connect the universal wire controller of the existing air-conditioning product with the temperature controller, realizes communication, has convenient connection mode, and is applicable to all the air-conditioning products which can be connected with the wire controller at present.

Description

Air conditioner and communication control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a communication control method thereof.
Background
The temperature controller can send a switch signal for controlling the opening of the fan and the electric heating of the indoor unit and controlling the compressor and the four-way valve of the outdoor unit to work. Some thermostats communicate using power frequency AC24V, an AC24V switching signal, for example, north american thermostats, may be used on north american vertical ductwork. However, as the communication between the rest air-conditioning products and the common line controller is a direct-current weak-current signal, and the interface is a special line controller communication interface, the communication can not be directly connected with the AC24V line controller, so that the air-conditioning products can not be matched with a local temperature controller for use, and the expansibility of the products is greatly reduced.
Disclosure of Invention
The invention provides an air conditioner and a communication control method thereof, which can connect a universal wire controller of the existing air conditioner product with a temperature controller, realize communication and simultaneously realize convenient connection mode, and can be suitable for all the existing air conditioner products with the wire controllers.
An air conditioner provided in a first embodiment of the present invention includes:
the indoor unit is used for exchanging heat with indoor air, and an indoor heat exchanger and an indoor fan are arranged in the indoor unit;
the outdoor unit is used for performing heat exchange with outdoor air, and is internally provided with an outdoor heat exchanger, an outdoor fan, a compressor, a flow regulating valve and a four-way valve, wherein the compressor, the flow regulating valve, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger are connected through pipelines to form a refrigerant circulation loop;
the communication switching device comprises a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit and a micro control unit; the first interface is connected with a wire controller interface of the indoor unit, the second interface is connected with a temperature controller, a first end of the wire controller communication circuit is connected with the first interface, a second end of the wire controller communication circuit is connected with a first end of the micro control unit, a second end of the micro control unit is connected with a first end of the signal conversion circuit, and a second end of the signal conversion circuit is connected with the second interface;
the controller is configured to convert a switching signal sent by the temperature controller into a first control signal through the signal conversion circuit and send the first control signal to the micro control unit; converting the first control signal into a second control signal through the micro control unit, and sending the second control signal to the wire controller communication circuit; the wire controller communication circuit sends the second control signal to the indoor unit through the first interface, so that the indoor unit executes a corresponding control instruction according to the second control signal.
In the air conditioner provided by the second embodiment of the invention, the signal conversion circuit comprises an optical coupler, and an input interface of the optical coupler is connected with a signal sending end of the temperature controller;
when the voltage amplitude of the switching signal sent by the temperature controller reaches a preset threshold value, the optocoupler is conducted; when the voltage amplitude of the switching signal sent by the temperature controller does not reach the preset threshold, the optocoupler is turned off, so that an output interface of the optocoupler outputs alternating high-low level signals.
In the air conditioner provided by the third embodiment of the present invention, the micro control unit converts the high-low level signal into a second control signal, and sends the second control signal to the communication circuit of the wire controller; wherein the second control signal is a direct current signal.
In the air conditioner provided by the fourth embodiment of the invention, the signal conversion circuit comprises an isolation operational amplifier, and an input interface of the isolation operational amplifier is connected with a signal transmitting end of the temperature controller;
the temperature controller sends the switch signal to the isolation operational amplifier, and the isolation operational amplifier performs isolation transmission on the switch signal after receiving the switch signal, so that an output interface of the isolation operational amplifier outputs a first control signal.
In the air conditioner provided by the fifth embodiment of the invention, the switch signal includes a fan signal, an electric heating signal, a press signal and a four-way valve signal.
The air conditioner communication control method provided in the sixth embodiment of the invention is applied to an air conditioner comprising an indoor heat exchanger, an indoor fan, an outdoor heat exchanger, an outdoor fan, a compressor, a flow regulating valve, a four-way valve and a communication switching device, wherein the communication switching device comprises a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit and a micro control unit; the first interface is connected with a wire controller interface of the indoor unit, the second interface is connected with a temperature controller, and the air conditioner communication control method comprises the following steps:
the switching signal sent by the temperature controller is converted into a first control signal through the signal conversion circuit, and the first control signal is sent to the micro control unit;
converting the first control signal into a second control signal through the micro control unit, and sending the second control signal to the wire controller communication circuit;
the wire controller communication circuit sends the second control signal to the indoor unit through the first interface, so that the indoor unit executes a corresponding control instruction according to the second control signal.
In the air conditioner communication control method provided by the seventh embodiment of the invention, the signal conversion circuit comprises an optical coupler, and an input interface of the optical coupler is connected with a signal sending end of the temperature controller;
when the voltage amplitude of the switching signal sent by the temperature controller reaches a preset threshold value, the optocoupler is conducted; when the voltage amplitude of the switching signal sent by the temperature controller does not reach the preset threshold, the optocoupler is turned off, so that an output interface of the optocoupler outputs alternating high-low level signals.
In the air conditioner communication control method provided by the eighth embodiment of the present invention, the micro control unit converts the high-low level signal into a second control signal, and sends the second control signal to the wire controller communication circuit; wherein the second control signal is a direct current signal.
In the air conditioner communication control method provided by the ninth embodiment of the invention, the signal conversion circuit comprises an isolation operational amplifier, and an input interface of the isolation operational amplifier is connected with a signal transmitting end of the temperature controller;
the temperature controller sends the switch signal to the isolation operational amplifier, and the isolation operational amplifier performs isolation transmission on the switch signal after receiving the switch signal, so that an output interface of the isolation operational amplifier outputs a first control signal.
In the air conditioner communication control method provided by the tenth embodiment of the present invention, the switching signals include a fan signal, an electric heating signal, a press signal, and a four-way valve signal.
Compared with the prior art, the air conditioner and the communication control method thereof provided by the embodiment of the invention have the beneficial effects that: the utility model provides a communication switching device, link up the drive-by-wire ware of temperature controller and indoor set through this communication switching device, utilize signal conversion circuit in the communication switching device to change the switching signal that the temperature controller sent into the control signal that can carry out the communication with little control unit MCU, little control unit MCU sends control signal to indoor set through drive-by-wire ware communication circuit again, and then makes indoor set can carry out corresponding control command according to control signal. The embodiment of the invention can connect the universal wire controller of the existing air-conditioning product with the temperature controller, realizes communication, has convenient connection mode, and can be suitable for all the air-conditioning products which can be connected with the wire controller at present.
Drawings
Fig. 1 is an external perspective view of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic view of a refrigerant circulation circuit of an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a communication switching device in an air conditioner according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a signal conversion circuit in an air conditioner according to an embodiment of the present invention;
fig. 6 is another schematic diagram of a signal conversion circuit in an air conditioner according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a wiring mode of an air conditioner according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating another connection mode of an air conditioner according to an embodiment of the present invention;
fig. 9 is a schematic signal transmission diagram of a communication switching device in an air conditioner according to an embodiment of the invention;
fig. 10 is a flowchart of a communication control method of an air conditioner according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Referring to fig. 1 to 2, fig. 1 is an external perspective view of an air conditioner according to an embodiment of the invention, and fig. 2 is a schematic structural diagram of an air conditioner according to an embodiment of the invention. The air conditioner 1 provided in the embodiment of the invention comprises:
an indoor unit 2 for exchanging heat with indoor air, in which an indoor heat exchanger 21 and an indoor fan 22 are provided;
an outdoor unit 3 for exchanging heat with outdoor air, wherein an outdoor heat exchanger 31, an outdoor fan 32, a compressor 33, a flow rate regulating valve 34 and a four-way valve 35 are provided, and the compressor 33, the flow rate regulating valve 34, the four-way valve 35, the outdoor heat exchanger 31 and the indoor heat exchanger 21 are connected by pipelines to form a refrigerant circulation circuit;
the communication switching device comprises a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit and a micro control unit; the first interface is connected with a wire controller interface of the indoor unit, the second interface is connected with a temperature controller, a first end of the wire controller communication circuit is connected with the first interface, a second end of the wire controller communication circuit is connected with a first end of the micro control unit, a second end of the micro control unit is connected with a first end of the signal conversion circuit, and a second end of the signal conversion circuit is connected with the second interface;
the controller is configured to convert a switching signal sent by the temperature controller into a first control signal through the signal conversion circuit and send the first control signal to the micro control unit; converting the first control signal into a second control signal through the micro control unit, and sending the second control signal to the wire controller communication circuit; the wire controller communication circuit sends the second control signal to the indoor unit through the first interface, so that the indoor unit executes a corresponding control instruction according to the second control signal.
Specifically, the air conditioner 1 in the embodiment of the present invention includes an indoor unit 2, and an indoor unit (shown in the figure) is taken as an example, and the indoor unit is generally mounted on an indoor wall surface or the like. For another example, an indoor unit (not shown) is also an indoor unit mode. The outdoor unit 3 is usually installed outdoors and is used for heat exchange in an indoor environment. In fig. 1, the outdoor unit 3 is shown by a broken line because the outdoor unit 3 is located outdoors on the opposite side of the indoor unit 2 across the wall surface. The indoor unit 2 and the outdoor unit 3 are connected by a connection pipe 4. Wherein, an indoor heat exchanger 21 and an indoor fan 22 are arranged in the indoor unit 2. The indoor heat exchanger 21 is configured by a plurality of fins and a coil pipe penetrating the plurality of fins, and the indoor heat exchanger 21 functions as an evaporator or a radiator according to the operation state of the indoor unit 2, and exchanges heat between the refrigerant flowing through the coil pipe and the air passing through the indoor heat exchanger 21. The indoor fan 22 is located at a substantially central portion inside the indoor unit casing, and the indoor fan 22 is a cross-flow fan having a substantially cylindrical shape elongated in the longitudinal direction (left-right direction) of the indoor unit 2. By rotationally driving the indoor fan 22, the indoor air is sucked from the suction port, passes through the air filter, and then is blown out from the blowing port into the room by the conditioned air generated by the indoor heat exchanger 21. The greater the rotational speed of the indoor fan 22, the greater the amount of conditioned air blown out from the outlet. The indoor heat exchanger 21 operates as an evaporator when the air conditioner is in a cooling mode. The indoor heat exchanger 21 functions as an evaporator or a radiator according to the operation state of the indoor unit, and exchanges heat between the refrigerant flowing through the heat transfer pipe and the air passing through the indoor heat exchanger. The indoor fan 22 generates an airflow of the indoor air passing through the indoor heat exchanger 21 to promote heat exchange between the refrigerant flowing in the heat transfer tubes of the indoor heat exchanger 21 and the indoor air. The outdoor unit 3 includes an outdoor heat exchanger 31, an outdoor fan 32, a compressor 33, a flow rate control valve 34, and a four-way valve 35. The outdoor fan 32 generates an airflow of the outdoor air passing through the outdoor heat exchanger 31 to promote heat exchange between the refrigerant flowing through the heat transfer pipe and the outdoor air, and the outdoor fan 32 is driven by an outdoor motor capable of changing the rotational speed. The outdoor heat exchanger 31 operates as a condenser when the air conditioner is in a cooling mode. The outdoor fan 32 generates an airflow of the outdoor air passing through the outdoor heat exchanger 31 to promote heat exchange between the refrigerant flowing in the heat transfer tubes of the outdoor heat exchanger 31 and the outdoor air.
Referring to fig. 3, fig. 3 is a schematic diagram of a refrigerant circulation circuit of an air conditioner according to an embodiment of the invention. The compressor 33, the flow rate regulating valve 34, the four-way valve 35, the outdoor heat exchanger 31, and the indoor heat exchanger 21 are connected by piping to form a refrigerant circulation circuit. The indoor heat exchanger 21 and the outdoor heat exchanger 31 function as a condenser or an evaporator. When the indoor heat exchanger 21 serves as a condenser and the outdoor heat exchanger 31 serves as an evaporator, the air conditioner serves as a heater of a heating mode; when the indoor heat exchanger 21 functions as an evaporator and the outdoor heat exchanger 31 functions as a condenser, the air conditioner functions as a cooler in a cooling mode. The four-way valve 35 is used to control the flow direction of the refrigerant in the refrigerant cycle to switch the outdoor heat exchanger and the indoor heat exchanger between functioning as a condenser and an evaporator. When the air conditioner is in the cooling mode, the indoor heat exchanger 21 and the outdoor heat exchanger 31 operate as an evaporator and a condenser, respectively. The refrigerant is compressed by the compressor and is converted into high-temperature high-pressure gas, the gas enters the outdoor heat exchanger of the outdoor unit through the four-way valve, the gas becomes medium-temperature high-pressure liquid after cold absorption and heat release of the outdoor heat exchanger, the liquid becomes low-temperature low-pressure liquid after passing through the flow regulating valve, the gas becomes low-temperature low-pressure gas after heat absorption and cold release of the indoor heat exchanger of the indoor unit, and the gas returns to the compressor through the four-way valve and then continues to circulate. By circulating the refrigerant in the refrigerant circuit, a vapor compression refrigeration cycle can be performed. Wherein the flow rate regulating valve is capable of changing the opening degree, and the flow resistance of the refrigerant passing through the flow rate regulating valve is increased by decreasing the opening degree; by increasing the opening degree, the flow path resistance of the refrigerant passing through the flow rate adjustment valve is reduced. Such a flow rate control valve expands and decompresses the refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger in the cooling operation. Further, even if the state of other devices mounted in the refrigerant circuit does not change, when the opening degree of the flow rate adjustment valve changes, the flow rate of the refrigerant flowing in the refrigerant circuit changes.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a communication switching device in an air conditioner according to an embodiment of the invention. Because the switch signal sent by the temperature controller is usually an alternating current signal, in order to receive the AC24V switch signal sent by the temperature controller and complete weak current signal communication between the AC24V and the air conditioner control board, a signal conversion circuit is added in the communication switching device for converting the AC24V signal into a direct current signal which can be communicated with the MCU. The communication switching device 5 includes a first interface 51, a second interface 52, a wire controller communication circuit 53, a signal conversion circuit 54, and a micro control unit MCU55. The first interface 51 is connected to a wire controller interface of the indoor unit 2, and the second interface 52 is connected to a temperature controller. The first end of the wire controller communication circuit 53 is connected with the first interface 51, the second end of the wire controller communication circuit 53 is connected with the first end of the micro control unit MCU55, the second end of the micro control unit MCU55 is connected with the first end of the signal conversion circuit 54, and the second end of the signal conversion circuit 54 is connected with the second interface 52. The signal conversion circuit 54 converts the switching signal from the thermostat into a first control signal, and transmits the first control signal to the micro control unit MCU55. The MCU55 converts the first control signal into a second control signal after receiving the first control signal, and sends the second control signal to the line controller communication circuit 53. The wire controller communication circuit 53 sends the second control signal to the indoor unit 2 through the first interface 51, so that the indoor unit 2 executes a corresponding control instruction according to the second control signal.
The embodiment of the invention can connect the universal wire controller of the existing air-conditioning product with the temperature controller, realizes communication, has convenient connection mode, and can be suitable for all the air-conditioning products which can be connected with the wire controller at present.
As one of the optional embodiments, the signal conversion circuit includes an optical coupler, and an input interface of the optical coupler is connected with a signal transmitting end of the temperature controller;
when the voltage amplitude of the switching signal sent by the temperature controller reaches a preset threshold value, the optocoupler is conducted; when the voltage amplitude of the switching signal sent by the temperature controller does not reach the preset threshold, the optocoupler is turned off, so that an output interface of the optocoupler outputs alternating high-low level signals.
Specifically, referring to fig. 5, fig. 5 is a schematic diagram of a signal conversion circuit in an air conditioner according to an embodiment of the invention. The signal conversion circuit in the embodiment of the invention comprises an optical coupler, and an input interface of the optical coupler is connected with a signal transmitting end of the temperature controller. The temperature controller can send switch signals such as an alternating-current press signal Y, a four-way valve signal B, an electric heating signal W and the like, and corresponds to input signals such as Vin1, vin2, vin3 and the like in fig. 5. When the voltage amplitude of the switching signal sent by the temperature controller reaches a preset threshold value, the optocoupler is conducted; when the voltage amplitude of the switching signal sent by the temperature controller does not reach the preset threshold value, the optocoupler is turned off, so that the 24V alternating current signal enables the optocoupler to be in a state of alternating on-off, and the output interface of the corresponding optocoupler outputs alternating high-low level signals Vout1-1, vout2-1, vout3-1 and the like. The MCU can correctly identify the changed weak current communication signal and judge the weak current communication signal as a load action instruction of a press and the like. When the temperature controller does not send a signal, the MCU end of the micro control unit can not receive the changed signal, so that the load stop instruction of the press and the like is judged, and the unidirectional transmission of the temperature controller signal is completed.
As one of the optional embodiments, the micro control unit converts the high-low level signal into a second control signal, and sends the second control signal to the wire controller communication circuit; wherein the second control signal is a direct current signal.
Specifically, because the standard wire controller communication circuit is used for the communication between the air conditioner indoor unit and the wire controller, the wire controller communication circuit for the communication between the communication switching device and the indoor unit is needed, and the micro control unit MCU converts the identified temperature controller switch control signal into a control signal of a wire controller communication protocol and then transmits the control signal to the air conditioner indoor unit through the wire controller communication circuit, so that the normal communication between the communication switching device and the air conditioner indoor unit is realized.
As one of the optional embodiments, the signal conversion circuit comprises an isolation operational amplifier, and an input interface of the isolation operational amplifier is connected with a signal transmitting end of the temperature controller;
the temperature controller sends the switch signal to the isolation operational amplifier, and the isolation operational amplifier performs isolation transmission on the switch signal after receiving the switch signal, so that an output interface of the isolation operational amplifier outputs a first control signal.
Specifically, referring to fig. 6, fig. 6 is another schematic diagram of a signal conversion circuit in an air conditioner according to an embodiment of the invention. The signal conversion circuit in the embodiment of the invention comprises an isolation operational amplifier, and an input interface of the isolation operational amplifier is connected with a signal transmitting end of a temperature controller. The temperature controller can send switch signals such as an alternating-current press signal Y, a four-way valve signal B, an electric heating signal W and the like, and corresponds to input signals such as Vin1, vin2, vin3 and the like in fig. 6. After receiving the switch signal, the isolation operational amplifier performs isolation transmission on the switch signal, so that the output interface of the isolation operational amplifier outputs first control signals Vout1-2, vout2-2, vout3-2 and the like. The micro control unit MCU can accurately identify the control signal and judge that the control signal is a load action instruction such as a press. When the temperature controller does not send a signal, the MCU end of the micro control unit can not receive the control signal, so that the control signal is judged to be a load stop instruction of a press and the like, and unidirectional transmission of the temperature controller signal is completed.
Please refer to fig. 7 and 8, fig. 7 is a schematic diagram of a wiring mode of an air conditioner according to an embodiment of the present invention, and fig. 8 is a schematic diagram of another wiring mode of an air conditioner according to an embodiment of the present invention. In practical application, when the air conditioner needs to be matched with a temperature controller, for example, the north american temperature controller is used, the second interface of the communication switching device is connected with the north american temperature controller, and the first interface is connected to a universal wire controller interface of an indoor unit control panel of the air conditioner to control the north american temperature controller. When the air conditioner is matched with a common wire controller, the connection of the communication switching device can be disconnected, and then the wire controller is directly connected to the indoor unit control panel for communication control.
As one of the alternative embodiments, the switch signal includes a fan signal, an electrical heating signal, a press signal, and a four-way valve signal.
Specifically, referring to fig. 9, fig. 9 is a signal transmission schematic diagram of a communication switching device in an air conditioner according to an embodiment of the invention. The signal conversion circuit in the embodiment of the invention adopts an optical coupler, and the switch signals sent by the temperature controller comprise a fan signal, an electric heating signal, a press signal, a four-way valve signal and the like, and the start and stop of the fan, the motor, the press and the four-way valve are controlled through the switch signals. Exemplary, the embodiment of the invention converts the switch signal sent by the temperature controller into an alternating high-low level signal through the optical coupler and sends the high-low level signal to the micro-control unit. The micro control unit can correctly identify the changed weak current communication signal and judge that the weak current communication signal is a load action instruction such as a press, so that the indoor unit executes the corresponding control instruction. When the North American temperature controller does not send a signal, the micro control unit end cannot receive the changed signal, so that the signal is judged to be a load stop instruction of a press and the like, and unidirectional transmission of the temperature controller signal is completed.
Referring to fig. 10, fig. 10 is a flowchart illustrating a communication control method of an air conditioner according to an embodiment of the invention. The air conditioner communication control method provided by the embodiment of the invention is applied to an air conditioner comprising an indoor heat exchanger, an indoor fan, an outdoor heat exchanger, an outdoor fan, a compressor, a flow regulating valve, a four-way valve and a communication switching device; the compressor, the flow regulating valve, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger are connected through pipelines to form a refrigerant circulation loop; the communication switching device comprises a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit and a micro control unit; the first interface is connected with a wire controller interface of the indoor unit, the second interface is connected with a temperature controller, a first end of a wire controller communication circuit is connected with the first interface, a second end of the wire controller communication circuit is connected with a first end of a micro control unit, a second end of the micro control unit is connected with a first end of a signal conversion circuit, a second end of the signal conversion circuit is connected with the second interface, and the air conditioner communication control method comprises the following steps:
s1, converting a switching signal sent by the temperature controller into a first control signal through the signal conversion circuit, and sending the first control signal to the micro control unit;
s2, converting the first control signal into a second control signal through the micro control unit, and sending the second control signal to the wire controller communication circuit;
and S3, the wire controller communication circuit sends the second control signal to the indoor unit through the first interface so that the indoor unit executes a corresponding control instruction according to the second control signal.
Specifically, because the switching signal sent by the temperature controller is usually an alternating current signal, the embodiment of the invention receives the AC24V switching signal sent by the temperature controller and completes the weak current signal communication between the AC24V and the air conditioner control board, and the embodiment of the invention adds a signal conversion circuit in the communication switching device for converting the AC24V signal into a direct current signal which can be communicated with the micro control unit MCU. The signal conversion circuit converts a switching signal sent by the temperature controller into a first control signal and sends the first control signal to the micro control unit MCU. After receiving the first control signal, the MCU converts the first control signal into a second control signal and sends the second control signal to the communication circuit of the wire controller. The wire controller communication circuit sends the second control signal to the indoor unit through the first interface so that the indoor unit executes a corresponding control instruction according to the second control signal.
The embodiment of the invention can connect the universal wire controller of the existing air-conditioning product with the temperature controller, realizes communication, has convenient connection mode, and can be suitable for all the air-conditioning products which can be connected with the wire controller at present.
As one of the optional embodiments, the signal conversion circuit includes an optical coupler, and an input interface of the optical coupler is connected with a signal transmitting end of the temperature controller;
when the voltage amplitude of the switching signal sent by the temperature controller reaches a preset threshold value, the optocoupler is conducted; when the voltage amplitude of the switching signal sent by the temperature controller does not reach the preset threshold, the optocoupler is turned off, so that an output interface of the optocoupler outputs alternating high-low level signals.
Specifically, the signal conversion circuit in the embodiment of the invention comprises an optical coupler, and an input interface of the optical coupler is connected with a signal transmitting end of the temperature controller. The temperature controller can send switch signals such as an alternating-current press signal Y, a four-way valve signal B, an electric heating signal W and the like, and corresponds to input signals such as Vin1, vin2, vin3 and the like in fig. 5. When the voltage amplitude of the switching signal sent by the temperature controller reaches a preset threshold value, the optocoupler is conducted; when the voltage amplitude of the switching signal sent by the temperature controller does not reach the preset threshold value, the optocoupler is turned off, so that the 24V alternating current signal enables the optocoupler to be in a state of alternating on-off, and the output interface of the corresponding optocoupler outputs alternating high-low level signals Vout1-1, vout2-1, vout3-1 and the like. The MCU can correctly identify the changed weak current communication signal and judge the weak current communication signal as a load action instruction of a press and the like. When the temperature controller does not send a signal, the MCU end of the micro control unit can not receive the changed signal, so that the load stop instruction of the press and the like is judged, and the unidirectional transmission of the temperature controller signal is completed.
As one of the optional embodiments, the micro control unit converts the high-low level signal into a second control signal, and sends the second control signal to the wire controller communication circuit; wherein the second control signal is a direct current signal.
Specifically, because the standard wire controller communication circuit is used for the communication between the air conditioner indoor unit and the wire controller, the wire controller communication circuit for the communication between the communication switching device and the indoor unit is needed, and the micro control unit MCU converts the identified temperature controller switch control signal into a control signal of a wire controller communication protocol and then transmits the control signal to the air conditioner indoor unit through the wire controller communication circuit, so that the normal communication between the communication switching device and the air conditioner indoor unit is realized.
As one of the optional embodiments, the signal conversion circuit comprises an isolation operational amplifier, and an input interface of the isolation operational amplifier is connected with a signal transmitting end of the temperature controller;
the temperature controller sends the switch signal to the isolation operational amplifier, and the isolation operational amplifier performs isolation transmission on the switch signal after receiving the switch signal, so that an output interface of the isolation operational amplifier outputs a first control signal. The temperature controller can send switch signals such as an alternating-current press signal Y, a four-way valve signal B, an electric heating signal W and the like, and corresponds to input signals such as Vin1, vin2, vin3 and the like in fig. 6. After receiving the switch signal, the isolation operational amplifier performs isolation transmission on the switch signal, so that the output interface of the isolation operational amplifier outputs first control signals Vout1-2, vout2-2, vout3-2 and the like. The micro control unit MCU can accurately identify the control signal and judge that the control signal is a load action instruction such as a press. When the temperature controller does not send a signal, the MCU end of the micro control unit can not receive the control signal, so that the control signal is judged to be a load stop instruction of a press and the like, and unidirectional transmission of the temperature controller signal is completed.
As one of the alternative embodiments, the switch signal includes a fan signal, an electrical heating signal, a press signal, and a four-way valve signal.
Specifically, the switch signal sent by the temperature controller in the embodiment of the invention comprises a fan signal, an electric heating signal, a press signal and a four-way valve signal, the switch signal sent by the temperature controller is converted into a first control signal through the signal conversion circuit, and the first control signal is sent to the micro control unit. The first control signal is converted into a second control signal through the micro control unit, and the second control signal is sent to the communication circuit of the wire controller. The wire controller communication circuit sends a second control signal to the indoor unit through the first interface so that the indoor unit executes a corresponding control instruction according to the second control signal.
The embodiment of the invention provides an air conditioner and a communication control method thereof, and designs a communication switching device, wherein a temperature controller is connected with a wire controller of an indoor unit through the communication switching device, a signal conversion circuit in the communication switching device is utilized to convert a switching signal sent by the temperature controller into a control signal which can be communicated with a micro control unit MCU, and the micro control unit MCU sends the control signal to the indoor unit through the wire controller communication circuit, so that the indoor unit can execute corresponding control instructions according to the control signal. The embodiment of the invention can connect the universal wire controller of the existing air-conditioning product with the temperature controller, realizes communication, has convenient connection mode, and can be suitable for all the air-conditioning products which can be connected with the wire controller at present.
It should be noted that the system embodiments described above are merely illustrative, and that the units described as separate units may or may not be physically separate, and that units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the system embodiment of the present invention, the connection relationship between the modules represents that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (10)

1. An air conditioner, comprising:
the indoor unit is used for exchanging heat with indoor air, and an indoor heat exchanger and an indoor fan are arranged in the indoor unit;
the outdoor unit is used for performing heat exchange with outdoor air, and is internally provided with an outdoor heat exchanger, an outdoor fan, a compressor, a flow regulating valve and a four-way valve, wherein the compressor, the flow regulating valve, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger are connected through pipelines to form a refrigerant circulation loop;
the communication switching device comprises a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit and a micro control unit; the first interface is connected with a wire controller interface of the indoor unit, the second interface is connected with a temperature controller, a first end of the wire controller communication circuit is connected with the first interface, a second end of the wire controller communication circuit is connected with a first end of the micro control unit, a second end of the micro control unit is connected with a first end of the signal conversion circuit, and a second end of the signal conversion circuit is connected with the second interface;
the controller is configured to convert a switching signal sent by the temperature controller into a first control signal through the signal conversion circuit and send the first control signal to the micro control unit; converting the first control signal into a second control signal through the micro control unit, and sending the second control signal to the wire controller communication circuit; the wire controller communication circuit sends the second control signal to the indoor unit through the first interface, so that the indoor unit executes a corresponding control instruction according to the second control signal.
2. The air conditioner of claim 1, wherein the signal conversion circuit comprises an optocoupler, and an input interface of the optocoupler is connected with a signal transmitting end of the temperature controller;
when the voltage amplitude of the switching signal sent by the temperature controller reaches a preset threshold value, the optocoupler is conducted; when the voltage amplitude of the switching signal sent by the temperature controller does not reach the preset threshold, the optocoupler is turned off, so that an output interface of the optocoupler outputs alternating high-low level signals.
3. The air conditioner as set forth in claim 2, wherein said micro control unit converts said high-low level signal into a second control signal and transmits said second control signal to said line controller communication circuit; wherein the second control signal is a direct current signal.
4. The air conditioner of claim 1, wherein the signal conversion circuit comprises an isolation operational amplifier, and an input interface of the isolation operational amplifier is connected with a signal transmitting end of the temperature controller;
the temperature controller sends the switch signal to the isolation operational amplifier, and the isolation operational amplifier performs isolation transmission on the switch signal after receiving the switch signal, so that an output interface of the isolation operational amplifier outputs a first control signal.
5. The air conditioner of claim 1, wherein the switching signals include a fan signal, an electrical heating signal, a press signal, and a four-way valve signal.
6. The communication control method of the air conditioner is characterized by being applied to the air conditioner comprising an indoor heat exchanger, an indoor fan, an outdoor heat exchanger, an outdoor fan, a compressor, a flow regulating valve, a four-way valve and a communication switching device, wherein the communication switching device comprises a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit and a micro control unit; the first interface is connected with a wire controller interface of the indoor unit, the second interface is connected with a temperature controller, and the air conditioner communication control method comprises the following steps:
the switching signal sent by the temperature controller is converted into a first control signal through the signal conversion circuit, and the first control signal is sent to the micro control unit;
converting the first control signal into a second control signal through the micro control unit, and sending the second control signal to the wire controller communication circuit;
the wire controller communication circuit sends the second control signal to the indoor unit through the first interface, so that the indoor unit executes a corresponding control instruction according to the second control signal.
7. The air conditioner communication control method as set forth in claim 6, wherein the signal conversion circuit comprises an optocoupler, an input interface of the optocoupler being connected with a signal transmitting end of the thermostat;
when the voltage amplitude of the switching signal sent by the temperature controller reaches a preset threshold value, the optocoupler is conducted; when the voltage amplitude of the switching signal sent by the temperature controller does not reach the preset threshold, the optocoupler is turned off, so that an output interface of the optocoupler outputs alternating high-low level signals.
8. The air conditioner communication control method as set forth in claim 7, wherein said micro control unit converts said high-low level signal into a second control signal and transmits said second control signal to said line controller communication circuit; wherein the second control signal is a direct current signal.
9. The air conditioner communication control method as set forth in claim 6, wherein the signal conversion circuit includes an isolation operational amplifier, an input interface of the isolation operational amplifier being connected with a signal transmitting end of the thermostat;
the temperature controller sends the switch signal to the isolation operational amplifier, and the isolation operational amplifier performs isolation transmission on the switch signal after receiving the switch signal, so that an output interface of the isolation operational amplifier outputs a first control signal.
10. The air conditioner communication control method as set forth in claim 6, wherein the switching signal includes a fan signal, an electric heating signal, a press signal, and a four-way valve signal.
CN202310344841.3A 2023-04-03 2023-04-03 Air conditioner and communication control method thereof Pending CN116293937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310344841.3A CN116293937A (en) 2023-04-03 2023-04-03 Air conditioner and communication control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310344841.3A CN116293937A (en) 2023-04-03 2023-04-03 Air conditioner and communication control method thereof

Publications (1)

Publication Number Publication Date
CN116293937A true CN116293937A (en) 2023-06-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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