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

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

An air conditioner and its communication control method

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 technique

The thermostat can send switch signals to control the fan of the indoor unit and the electric heating to start, and to control the compressor and four-way valve of the outdoor unit to work. Some thermostats use power frequency AC 24V for communication, which is an AC24V switch signal. For example, North American thermostats can be used on North American vertical duct machines. However, since the communication between the other air-conditioning products and ordinary wire controllers is a DC weak current signal, and the interface is a dedicated wire controller communication interface, it cannot be directly connected to the AC24V wire controller for communication, resulting in that the air-conditioning products cannot be used with local thermostats. , greatly reducing product scalability.

Contents of the invention

The invention provides an air conditioner and a communication control method thereof, which can connect the general-purpose wire controller of the existing air-conditioning products with the temperature controller, realize communication, and have a convenient connection method, and can be applied to all current connectable wire controllers air conditioning products.

The air conditioner provided in the first embodiment of the present invention includes:

The indoor unit is used for heat exchange with indoor air, and is equipped with an indoor heat exchanger and an indoor fan;

The outdoor unit is used for heat exchange with outdoor air, and is equipped with an outdoor heat exchanger, an outdoor fan, a compressor, a flow regulating valve, and a four-way valve. The compressor, the flow regulating valve, and the four-way valve are . The outdoor heat exchanger and the indoor heat exchanger are connected through pipelines to form a refrigerant circulation loop;

The communication conversion device includes a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit, and a micro control unit; wherein, the first interface is connected to the wire controller interface of the indoor unit, and the second The second interface is connected to the temperature controller, the first end of the wire controller communication circuit is connected to the first interface, the second end of the wire controller communication circuit is connected to the first end of the micro control unit, The second end of the micro control unit is connected to the first end of the signal conversion circuit, and the second end of the signal conversion circuit is connected to the second interface;

The controller is configured to convert the switch signal sent by the thermostat into a first control signal through the signal conversion circuit, and send the first control signal to the micro control unit; through the micro control The unit converts the first control signal into a second control signal, and sends the second control signal to the wire controller communication circuit; the wire controller communication circuit transmits the first control signal through the first interface The second control signal is sent to the indoor unit, 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 present invention, the signal conversion circuit includes an optocoupler, and the input interface of the optocoupler is connected to the signal sending end of the thermostat;

When the voltage amplitude of the switch signal sent by the thermostat reaches a preset threshold, the optocoupler is turned on; when the voltage amplitude of the switch signal sent by the thermostat does not reach the preset threshold, The optocoupler is turned off, so that the output interface of the optocoupler outputs alternating high and low level signals.

In the air conditioner provided by the third embodiment of the present invention, the micro control unit converts the high and low level signals 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 provided in the fourth embodiment of the present invention, the signal conversion circuit includes an isolated operational amplifier, and the input interface of the isolated operational amplifier is connected to the signal sending end of the thermostat;

The temperature controller sends the switching signal to the isolated operational amplifier, and after receiving the switching signal, the isolated operational amplifier performs isolated transmission on the switching signal, so that the output interface of the isolated operational amplifier outputs the first a control signal.

In the air conditioner provided by the fifth embodiment of the present invention, the switch signal includes a fan signal, an electric heating signal, a compressor signal and a four-way valve signal.

The air conditioner communication control method provided in the sixth embodiment of the present invention is applied to 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 adapter device The air conditioner of the air conditioner, wherein, the communication adapter device includes 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 to the wire controller interface of the indoor unit, The second interface is connected to a thermostat, and the air conditioner communication control method includes:

converting the switch signal sent by the thermostat into a first control signal through the signal conversion circuit, and sending 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 command according to the second control signal.

In the air conditioner communication control method provided by the seventh embodiment of the present invention, the signal conversion circuit includes an optocoupler, and the input interface of the optocoupler is connected to the signal sending end of the thermostat;

When the voltage amplitude of the switch signal sent by the thermostat reaches a preset threshold, the optocoupler is turned on; when the voltage amplitude of the switch signal sent by the thermostat does not reach the preset threshold, The optocoupler is turned off, so that the output interface of the optocoupler outputs alternating high and 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 and low level signals into a second control signal, and sends the second control signal to the wire controller A communication circuit; wherein, the second control signal is a DC signal.

In the air conditioner communication control method provided by the ninth embodiment of the present invention, the signal conversion circuit includes an isolated operational amplifier, and the input interface of the isolated operational amplifier is connected to the signal sending end of the thermostat;

The temperature controller sends the switching signal to the isolated operational amplifier, and after receiving the switching signal, the isolated operational amplifier performs isolated transmission on the switching signal, so that the output interface of the isolated operational amplifier outputs the first a control signal.

In the air conditioner communication control method provided by the tenth embodiment of the present invention, the switching signals include fan signals, electric heating signals, compressor signals and four-way valve signals.

Compared with the prior art, the beneficial effect of the air conditioner and its communication control method provided by the embodiment of the present invention lies in: designing a communication switching device, through which the wire control of the thermostat and the indoor unit The switch signal sent by the thermostat is converted into a control signal capable of communicating with the micro control unit MCU by using the signal conversion circuit in the communication adapter device, and the micro control unit MCU then passes the control signal through the wire controller communication circuit Send it to the indoor unit, so that the indoor unit can execute corresponding control instructions according to the control signal. The embodiment of the present invention can connect the general-purpose wire controller of the existing air-conditioning product with the thermostat, realize communication, and the connection mode is convenient, and can be applied to all current air-conditioning products that can be connected with the wire controller.

Description of drawings

Fig. 1 is an appearance perspective view of an air conditioner provided by an embodiment of the present invention;

Fig. 2 is a schematic structural view of an air conditioner provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram 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 adapter 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 the wiring mode of an air conditioner provided by an embodiment of the present invention;

Fig. 8 is a schematic diagram of another wiring mode of an air conditioner provided by an embodiment of the present invention;

Fig. 9 is a schematic diagram of signal transmission of a communication adapter device in an air conditioner according to an embodiment of the present invention;

Fig. 10 is a schematic flowchart of a communication control method for an air conditioner provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the application.

The terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Please refer to FIG. 1 to FIG. 2 . FIG. 1 is a perspective view of the appearance of an air conditioner provided by an embodiment of the present invention, and FIG. 2 is a schematic structural view of an air conditioner provided by an embodiment of the present invention. The air conditioner 1 provided in the embodiment of the present invention includes:

The indoor unit 2 is used for heat exchange with indoor air, and is equipped with an indoor heat exchanger 21 and an indoor fan 22;

The outdoor unit 3 is used for exchanging heat with outdoor air, and is equipped with an outdoor heat exchanger 31, an outdoor fan 32, a compressor 33, a flow regulating valve 34 and a four-way valve 35, the compressor 33, the flow regulating The 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 loop;

The communication conversion device includes a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit, and a micro control unit; wherein, the first interface is connected to the wire controller interface of the indoor unit, and the second The second interface is connected to the temperature controller, the first end of the wire controller communication circuit is connected to the first interface, the second end of the wire controller communication circuit is connected to the first end of the micro control unit, The second end of the micro control unit is connected to the first end of the signal conversion circuit, and the second end of the signal conversion circuit is connected to the second interface;

The controller is configured to convert the switch signal sent by the thermostat into a first control signal through the signal conversion circuit, and send the first control signal to the micro control unit; through the micro control The unit converts the first control signal into a second control signal, and sends the second control signal to the wire controller communication circuit; the wire controller communication circuit transmits the first control signal through the first interface The second control signal is sent to the indoor unit, so that the indoor unit executes a corresponding control instruction according to the second control signal.

Specifically, in the embodiment of the present invention, the air conditioner 1 includes an indoor unit 2. Taking an indoor hanging unit (shown in the figure) as an example, the indoor hanging unit is usually installed on an indoor wall or the like. For another example, the indoor cabinet machine (not shown in the figure) is also a form of the indoor unit. The outdoor unit 3 is usually set outdoors for heat exchange in the indoor environment. In addition, in FIG. 1, since the outdoor unit 3 is located outdoors on the opposite side to the indoor unit 2 across a wall, the outdoor unit 3 is indicated by a dotted line. The indoor unit 2 and the outdoor unit 3 are connected by a connecting pipe 4 . Wherein, the indoor unit 2 is provided with an indoor heat exchanger 21 and an indoor fan 22 . The indoor heat exchanger 21 is composed of a plurality of cooling fins and a coil pipe passing through the plurality of cooling fins. The indoor heat exchanger 21 functions as an evaporator or a radiator according to the operating state of the indoor unit 2, and makes the heat flowing in the coil pipe The refrigerant exchanges heat with 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 that is elongated in a substantially cylindrical shape in the longitudinal direction (left-right direction) of the indoor unit 2 . By rotationally driving the indoor fan 22 , indoor air is sucked in from the suction port, passed through the air filter, and conditioned air generated by passing through the indoor heat exchanger 21 is blown out from the blower port into the room. The larger the rotation speed of the indoor fan 22 is, the larger the volume of the conditioned air blown out from the outlet is. When the air conditioner is in cooling mode, the indoor heat exchanger 21 works as an evaporator. The indoor heat exchanger 21 functions as an evaporator or a radiator depending on the operating state of the indoor unit, and exchanges heat between the refrigerant flowing through the heat transfer tubes and the air passing through the indoor heat exchanger. The indoor fan 22 generates an air flow 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 is equipped with an outdoor heat exchanger 31 , an outdoor fan 32 , a compressor 33 , a flow regulating valve 34 and a four-way valve 35 . The outdoor fan 32 generates an air flow of outdoor air passing through the outdoor heat exchanger 31 to promote heat exchange between the refrigerant flowing in the heat transfer tube and the outdoor air, and is driven by an outdoor motor whose rotation speed can be changed. When the air conditioner is in cooling mode, the outdoor heat exchanger 31 works as a condenser. 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.

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a refrigerant circulation circuit of an air conditioner according to an embodiment of the present invention. The compressor 33 , the flow 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 loop. The indoor heat exchanger 21 and the outdoor heat exchanger 31 function as a condenser or an evaporator. When the indoor heat exchanger 21 is used as a condenser and the outdoor heat exchanger 31 is used as an evaporator, the air conditioner is used as a heater in heating mode; when the indoor heat exchanger 21 is used as an evaporator, the outdoor heat exchanger 31 is used as a When the condenser is used, the air conditioner works as a cooler in cooling mode. The four-way valve 35 is used to control the flow direction of the refrigerant in the refrigerant cycle, so that the outdoor heat exchanger and the indoor heat exchanger can be switched between condensers and evaporators. When the air conditioner is in cooling mode, the indoor heat exchanger 21 and the outdoor heat exchanger 31 work as an evaporator and a condenser respectively. The refrigerant is transformed into a high-temperature and high-pressure gas through the compression of the compressor, and enters the outdoor heat exchanger of the outdoor unit through the four-way valve. It turns into a low-temperature and low-pressure liquid, and after the indoor heat exchanger of the indoor unit absorbs heat and releases cooling, it becomes a low-temperature and low-pressure gas, returns to the compressor through the four-way valve, and then continues the cycle. By circulating the refrigerant in the refrigerant circuit, a vapor compression refrigeration cycle can be performed. Wherein, the flow regulating valve can change the opening degree, by reducing the opening degree, the flow path resistance of the refrigerant passing through the flow regulating valve is increased; by increasing the opening degree, the flow path resistance of the refrigerant passing through the flow regulating valve is reduced . Such a flow regulating valve expands and depressurizes the refrigerant flowing from the indoor heat exchanger toward the outdoor heat exchanger during cooling operation. In addition, even if the state of other devices installed in the refrigerant circuit does not change, when the opening degree of the flow regulating valve changes, the flow rate of the refrigerant flowing in the refrigerant circuit changes.

Please refer to FIG. 4 . FIG. 4 is a schematic structural diagram of a communication adapter device in an air conditioner according to an embodiment of the present invention. Since the switch signal sent by the thermostat is usually an AC signal, in order to receive the AC24V switch signal sent by the thermostat and complete the weak current signal communication between the AC24V and the air conditioner control board, the embodiment of the present invention adds a signal conversion circuit to the communication adapter device , to convert the AC24V signal into a DC signal that can communicate with the micro control unit MCU. The communication adapter 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 . Wherein, the first interface 51 is connected with the wire controller interface of the indoor unit 2, and the second interface 52 is connected with the temperature controller. The first end of the wire controller communication circuit 53 is connected to the first interface 51, the second end of the wire controller communication circuit 53 is connected to the first end of the micro control unit MCU55, and the second end of the micro control unit MCU55 is connected to the signal conversion circuit The first end of the signal conversion circuit 54 is connected to the second interface 52 . The signal conversion circuit 54 converts the switch signal sent by the thermostat into a first control signal, and sends the first control signal to the micro control unit MCU55. After receiving the first control signal, the micro control unit MCU55 converts it into a second control signal, and sends the second control signal to the wire 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 corresponding control instructions according to the second control signal.

The embodiment of the present invention can connect the general-purpose wire controller of the existing air-conditioning product with the thermostat, realize communication, and the connection mode is convenient, and can be applied to all current air-conditioning products that can be connected with the wire controller.

As an optional embodiment, the signal conversion circuit includes an optocoupler, and the input interface of the optocoupler is connected to the signal sending end of the thermostat;

When the voltage amplitude of the switch signal sent by the thermostat reaches a preset threshold, the optocoupler is turned on; when the voltage amplitude of the switch signal sent by the thermostat does not reach the preset threshold, The optocoupler is turned off, so that the output interface of the optocoupler outputs alternating high and low level signals.

Specifically, please refer to FIG. 5 . FIG. 5 is a schematic diagram of a signal conversion circuit in an air conditioner according to an embodiment of the present invention. In the embodiment of the present invention, the signal conversion circuit includes an optocoupler, and the input interface of the optocoupler is connected to the signal sending end of the temperature controller. The thermostat will send switching signals such as AC compressor signal Y, four-way valve signal B, electric heating signal W, etc., corresponding to input signals such as Vin1, Vin2, and Vin3 in Figure 5. When the voltage amplitude of the switch signal sent by the thermostat reaches the preset threshold, the optocoupler is turned on; when the voltage amplitude of the switch signal sent by the thermostat does not reach the preset threshold, the optocoupler is turned off, so the 24V AC The signal makes the optocoupler turn on and off alternately, and the output interface of the corresponding optocoupler outputs alternating high and low level signals Vout1-1, Vout2-1, Vout3-1, etc. The micro control unit MCU can correctly identify this changing weak current communication signal, and judge it as a load action command such as a press. When the thermostat does not send a signal, the MCU side does not receive the changed signal, so it is judged as a load stop instruction such as a compressor, and the one-way transmission of the thermostat signal is completed.

As an optional embodiment, the micro control unit converts the high and low level signals into a second control signal, and sends the second control signal to the wire controller communication circuit; wherein, the The second control signal is a direct current signal.

Specifically, since the indoor unit of the air conditioner uses a standard wire controller communication circuit for communication with the wire controller, the communication adapter device needs to have a wire controller communication circuit for communication with the indoor unit, and the micro control unit MCU will recognize the thermostat switch After the control signal is converted into the control signal of the wire controller communication protocol, it is transmitted to the air conditioner indoor unit through the wire controller communication circuit, so as to realize normal communication between the communication adapter device and the air conditioner indoor unit.

As an optional embodiment, the signal conversion circuit includes an isolated operational amplifier, and the input interface of the isolated operational amplifier is connected to the signal sending end of the thermostat;

The temperature controller sends the switching signal to the isolated operational amplifier, and after receiving the switching signal, the isolated operational amplifier performs isolated transmission on the switching signal, so that the output interface of the isolated operational amplifier outputs the first a control signal.

Specifically, please refer to FIG. 6 . FIG. 6 is another schematic diagram of a signal conversion circuit in an air conditioner according to an embodiment of the present invention. In the embodiment of the present invention, the signal conversion circuit includes an isolated operational amplifier, and the input interface of the isolated operational amplifier is connected to the signal sending end of the temperature controller. The thermostat will send switching signals such as AC compressor signal Y, four-way valve signal B, electric heating signal W, etc., corresponding to input signals such as Vin1, Vin2, and Vin3 in Figure 6. After the isolated operational amplifier receives the switching signal, it isolates and transmits the switching signal, so that the output interface of the isolated operational amplifier outputs the first control signals Vout1-2, Vout2-2, Vout3-2 and so on. The micro control unit MCU can correctly identify the control signal and judge it as a load action command such as a press. When the thermostat does not send a signal, the MCU side cannot receive the control signal, so it is judged as a load stop instruction such as a compressor, and the one-way transmission of the thermostat signal is completed.

It should be noted that please refer to Figure 7 and Figure 8, Figure 7 is a schematic diagram of the wiring mode of an air conditioner provided by an embodiment of the present invention, and Figure 8 is another wiring diagram of an air conditioner provided by an embodiment of the present invention Method diagram. In practical applications, when the air conditioner needs to be matched with a thermostat, such as a North American thermostat, the second interface of the communication adapter device is connected to the North American thermostat, and the first interface is connected to the control board of the indoor unit of the air conditioner. Universal wire controller interface for North American thermostat control. When the air conditioner is used with an ordinary wire controller, the connection of the communication adapter device can be disconnected, and then the wire controller can be directly connected to the control board of the indoor unit for communication control.

As an optional embodiment, the switch signal includes a fan signal, an electric heating signal, a compressor signal, and a four-way valve signal.

Specifically, please refer to FIG. 9 . FIG. 9 is a schematic diagram of signal transmission of a communication adapter device in an air conditioner according to an embodiment of the present invention. In the embodiment of the present invention, the signal conversion circuit adopts an optocoupler, and the switching signals sent by the temperature controller include fan signals, electric heating signals, compressor signals, and four-way valve signals, etc., and the fan, motor, compressor, and the like are controlled by the switching signals. The start and stop of the four-way valve. Exemplarily, in the embodiment of the present invention, the switching signal sent by the thermostat is converted into an alternating high and low level signal through the optocoupler, and the high and low level signal is sent to the micro control unit. The micro control unit can correctly identify the changing weak current communication signal, and judge it as a load action command such as a compressor, so that the indoor unit executes the corresponding control command. When the thermostat in North America does not send a signal, the micro control unit does not receive the changed signal, so it is judged as a load stop command such as a compressor, and the one-way transmission of the thermostat signal is completed.

Please refer to FIG. 10 . FIG. 10 is a schematic flowchart of a communication control method for an air conditioner according to an embodiment of the present invention. The air conditioner communication control method provided in the embodiment of the present invention is applied to an air conditioner including 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 adapter The compressor, the flow regulating valve, the four-way valve, the outdoor heat exchanger and the indoor heat exchanger are connected by pipelines to form a refrigerant circulation loop; the communication adapter includes a first interface, a second interface, a wire controller communication circuit, a signal conversion circuit, and a micro control unit; wherein, the first interface is connected to the wire controller interface of the indoor unit, and the second interface is connected to a thermostat, The first end of the wire controller communication circuit is connected to the first interface, the second end of the wire controller communication circuit is connected to the first end of the micro control unit, and the second end of the micro control unit end is connected to the first end of the signal conversion circuit, the second end of the signal conversion circuit is connected to the second interface, and the air conditioner communication control method includes:

S1. Convert the switch signal sent by the thermostat into a first control signal through the signal conversion circuit, and send the first control signal to the micro control unit;

S2. Convert the first control signal into a second control signal through the micro control unit, and send the second control signal to the wire controller communication circuit;

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 command according to the second control signal.

Specifically, because the switch signal sent by the thermostat is usually an AC signal, the embodiment of the present invention receives the AC24V switch signal sent by the thermostat, and completes the weak current signal communication between the AC24V and the air conditioner control board. A signal conversion circuit is added to the connection device to convert the AC24V signal into a DC signal capable of communicating with the micro control unit MCU. The signal conversion circuit converts the switching signal sent by the thermostat into a first control signal, and sends the first control signal to the micro control unit MCU. After receiving the first control signal, the micro control unit MCU converts it into a second control signal, and sends 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 corresponding control instructions according to the second control signal.

The embodiment of the present invention can connect the general-purpose wire controller of the existing air-conditioning product with the thermostat, realize communication, and the connection mode is convenient, and can be applied to all current air-conditioning products that can be connected with the wire controller.

As an optional embodiment, the signal conversion circuit includes an optocoupler, and the input interface of the optocoupler is connected to the signal sending end of the thermostat;

When the voltage amplitude of the switch signal sent by the thermostat reaches a preset threshold, the optocoupler is turned on; when the voltage amplitude of the switch signal sent by the thermostat does not reach the preset threshold, The optocoupler is turned off, so that the output interface of the optocoupler outputs alternating high and low level signals.

Specifically, the signal conversion circuit in the embodiment of the present invention includes an optocoupler, and the input interface of the optocoupler is connected to the signal sending end of the temperature controller. The thermostat will send switching signals such as AC compressor signal Y, four-way valve signal B, electric heating signal W, etc., corresponding to input signals such as Vin1, Vin2, and Vin3 in Figure 5. When the voltage amplitude of the switch signal sent by the thermostat reaches the preset threshold, the optocoupler is turned on; when the voltage amplitude of the switch signal sent by the thermostat does not reach the preset threshold, the optocoupler is turned off, so the 24V AC The signal makes the optocoupler turn on and off alternately, and the output interface of the corresponding optocoupler outputs alternating high and low level signals Vout1-1, Vout2-1, Vout3-1, etc. The micro control unit MCU can correctly identify this changing weak current communication signal, and judge it as a load action command such as a press. When the thermostat does not send a signal, the MCU side does not receive the changed signal, so it is judged as a load stop instruction such as a compressor, and the one-way transmission of the thermostat signal is completed.

As an optional embodiment, the micro control unit converts the high and low level signals into a second control signal, and sends the second control signal to the wire controller communication circuit; wherein, the The second control signal is a direct current signal.

Specifically, since the indoor unit of the air conditioner uses a standard wire controller communication circuit for communication with the wire controller, the communication adapter device needs to have a wire controller communication circuit for communication with the indoor unit, and the micro control unit MCU will recognize the thermostat switch After the control signal is converted into the control signal of the wire controller communication protocol, it is transmitted to the air conditioner indoor unit through the wire controller communication circuit, so as to realize normal communication between the communication adapter device and the air conditioner indoor unit.

As an optional embodiment, the signal conversion circuit includes an isolated operational amplifier, and the input interface of the isolated operational amplifier is connected to the signal sending end of the thermostat;

The temperature controller sends the switching signal to the isolated operational amplifier, and after receiving the switching signal, the isolated operational amplifier performs isolated transmission on the switching signal, so that the output interface of the isolated operational amplifier outputs the first a control signal. The thermostat will send switching signals such as AC compressor signal Y, four-way valve signal B, electric heating signal W, etc., corresponding to input signals such as Vin1, Vin2, and Vin3 in Figure 6. After the isolated operational amplifier receives the switching signal, it isolates and transmits the switching signal, so that the output interface of the isolated operational amplifier outputs the first control signals Vout1-2, Vout2-2, Vout3-2 and so on. The micro control unit MCU can correctly identify the control signal and judge it as a load action command such as a press. When the thermostat does not send a signal, the MCU side cannot receive the control signal, so it is judged as a load stop instruction such as a compressor, and the one-way transmission of the thermostat signal is completed.

As an optional embodiment, the switch signal includes a fan signal, an electric heating signal, a compressor signal, and a four-way valve signal.

Specifically, the switch signal sent by the thermostat in the embodiment of the present invention includes fan signal, electric heating signal, compressor signal and four-way valve signal, and the switch signal sent by the thermostat is converted into the first control signal by the signal conversion circuit , and send the first control signal to the micro control unit. The first control signal is converted into a second control signal by the micro control unit, and the second control signal is sent 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 corresponding control instructions according to the second control signal.

The embodiment of the present invention provides an air conditioner and its communication control method. A communication adapter device is designed, through which the thermostat and the wire controller of the indoor unit are connected, and the The signal conversion circuit of the thermostat converts the switch signal sent by the thermostat into a control signal that can communicate with the 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 present invention can connect the general-purpose wire controller of the existing air-conditioning product with the thermostat, realize communication, and the connection mode is convenient, and can be applied to all current air-conditioning products that can be connected with the wire controller.

It should be noted that the system embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physically separated. A unit can be located in one place, or it can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the system embodiments provided by the present invention, the connection relationship between modules indicates that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. It can be understood and implemented by those skilled in the art without creative effort.

The above description is a preferred embodiment of the present invention, and it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present 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.

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