CN112524686B

CN112524686B - Air conditioner

Info

Publication number: CN112524686B
Application number: CN202011378760.8A
Authority: CN
Inventors: 张新; 赵晓明; 刘聚科
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2023-01-13
Anticipated expiration: 2040-11-30
Also published as: CN112524686A

Abstract

The present invention provides an air conditioner, comprising: the power line is used for accessing an external power supply; indoor set, be provided with in it: an indoor unit control circuit; the first side of the indoor unit communication isolation module is connected with a communication port of the indoor unit control circuit; the off-premises station, be provided with in it: an outdoor unit control circuit; the first side of the outdoor unit communication isolation module is connected with a communication port of the outdoor unit control circuit; the power signal arrangement module is connected with a power line, the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module and is configured to convert a power signal of an external power supply into a communication power signal required by the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module, so that the air conditioner can provide a proper working power supply for the second sides of the indoor unit communication isolation module and the outdoor unit communication isolation module, the communication isolation module can be reduced or prevented from being damaged, and the service life of the whole air conditioner is prolonged.

Description

Air conditioner

Technical Field

The invention relates to an electric appliance, in particular to an air conditioner.

Background

Generally, the air conditioner uses the power frequency voltage as power to adjust parameters such as the temperature and the humidity of indoor unit air.

In the prior art, part of air conditioners use communication isolation modules to realize communication between indoor units and outdoor units, and need to provide working power supply for the communication isolation modules. However, the working voltage required by the communication isolation module is often lower than the power frequency voltage, and if the air conditioner directly utilizes the power frequency voltage to provide the working voltage for the communication isolation module, the communication isolation module is damaged, and safety accidents are caused.

Therefore, how to improve the circuit structure of the air conditioner so that the air conditioner provides a proper working power supply for the communication isolation module becomes a technical problem to be solved by those skilled in the art.

Disclosure of Invention

It is an object of the present invention to provide an air conditioner that at least partially solves the above problems.

A further object of the present invention is to improve the circuit structure of the air conditioner so that the air conditioner provides a proper operating power supply for the communication isolation module.

It is a still further object of this invention to increase the versatility of the power signal conditioning module.

Still another object of the present invention is to reduce standby power consumption of an air conditioner and achieve energy saving.

A further object of the present invention is to reduce the standby power consumption of the power signal conditioning module.

It is still a further object of the present invention to provide an outdoor unit that is "live" with a simple circuit.

It is yet a further object of the present invention to enable multiplexing of connection lines.

It is another further object of the present invention to simplify the control process of the air conditioner.

The air conditioner of the present invention includes: the power line is used for accessing an external power supply; indoor set, be provided with in it: an indoor unit control circuit; the first side of the indoor unit communication isolation module is connected with a communication port of the indoor unit control circuit; the off-premises station, be provided with in it: an outdoor unit control circuit; the first side of the outdoor unit communication isolation module is connected with a communication port of an outdoor unit control circuit; and the power supply signal sorting module is connected with the power supply line, the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module, and is configured to convert the power supply signal of the external power supply into the communication power supply signal required by the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module so as to provide working power supplies for the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module.

Optionally, the outdoor unit further includes: the outdoor unit switching power supply is connected to the power line and is used for supplying power to the outdoor unit control circuit; an outdoor unit power line for connecting the power line to an outdoor unit switching power supply; and the outdoor unit first switching element is connected between the outdoor unit power line and the outdoor unit switching power supply and is used for controllably controlling the on-off of the outdoor unit power line according to the working state of the air conditioner.

Optionally, the power signal sorting module is disposed in the outdoor unit and connected between the first switching element of the outdoor unit and the outdoor unit switching power supply; and the outdoor unit first switching element is configured to controllably turn off the outdoor unit power supply line when the air conditioner is switched to the standby state, and is further configured to controllably turn on the outdoor unit power supply line during the switching of the air conditioner from the standby state to the operating state.

Optionally, the power signal arrangement module includes: the rectifier is used for converting a power supply signal of an external power supply into a direct-current voltage signal required by the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module; and the voltage regulating component is connected to the rectifier and used for regulating the voltage value of the direct-current voltage signal.

Optionally, the voltage regulation assembly comprises: the smoothing capacitor is connected to the output end of the rectifier and used for filtering the direct-current voltage signal; the voltage stabilizing component is used for adjusting the output voltage value of the smoothing capacitor and is provided with a first resistor connected to the input end of the rectifier, and a Zener diode and a second resistor which are arranged in parallel with the smoothing capacitor.

Optionally, the air conditioner further comprises: and the on-line assembly is used for connecting the indoor unit and the outdoor unit and is configured to controllably connect a power line to an outdoor unit switching power supply or connect a communication interface of the indoor unit communication isolation module to a communication interface of the outdoor unit communication isolation module according to the working state of the air conditioner.

Optionally, the inline assembly comprises: a connection line having a first end for connecting to the indoor unit and a second end for connecting to the outdoor unit; the indoor unit switching component is arranged on the indoor unit and used for controllably connecting the first end of the connecting line to the power line or the second side of the indoor unit communication isolation module according to the working state of the air conditioner; and the outdoor unit switching assembly is arranged on the outdoor unit and used for controllably connecting the second end of the connecting wire to the outdoor unit switching power supply or the communication interface of the outdoor unit communication isolation module according to the working state of the air conditioner.

Optionally, the indoor unit switching assembly includes: the indoor unit power supply line is used for connecting the power line; and the indoor unit switching element is connected between the indoor unit power supply line and the first end of the connecting line and is used for controllably controlling the on-off of the indoor unit power supply line according to the working state of the air conditioner.

Optionally, the outdoor unit switching assembly includes: the outdoor unit power supply line is used for connecting an outdoor unit switching power supply; the outdoor unit communication line is used for connecting the outdoor unit communication interface; and the second switching element of the outdoor unit is used for controllably controlling the opening and closing of the first static contact and the second static contact according to the working state of the air conditioner.

Optionally, in the process of switching the air conditioner from the standby state to the operating state, the indoor unit switching component connects the first end of the connecting line to the power line, the outdoor unit switching component connects the second end of the connecting line to the outdoor unit switching power supply to energize the outdoor unit switching power supply, so that the outdoor unit switching power supply supplies power to the outdoor unit control circuit, after the outdoor unit switching power supply supplies power to the outdoor unit control circuit, the indoor unit switching component connects the first end of the connecting line to the communication interface of the indoor unit communication isolation module, and the outdoor unit switching component connects the second end of the connecting line to the communication interface of the outdoor unit communication isolation module.

The air conditioner comprises a power line, an indoor unit, an outdoor unit and a power signal sorting module. By improving the circuit structure of the air conditioner, the power signal of an external power supply is converted into a communication power supply signal required by the second side of the indoor unit communication isolation module and the second side of the outdoor unit communication isolation module by the power supply signal sorting module so as to provide working power supplies for the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module, so that the air conditioner can provide proper working power supplies for the second sides of the indoor unit communication isolation module and the outdoor unit communication isolation module, the communication isolation module can be reduced or prevented from being damaged, and the service life of the whole air conditioner is prolonged.

Furthermore, the power signal conditioning module of the air conditioner comprises a rectifier and a voltage regulating component. Because the types of the communication isolation modules on the market are various, and working power supplies required by the second sides of the communication isolation modules of different types are often different, the rectifier and the voltage regulating component are matched with each other, so that various parameters of the rectifier and the voltage regulating component can be regulated according to the working power supplies required by the communication isolation modules, the regulating range of the working power supplies is ensured, the universality of the power signal sorting module is favorably improved, and the power signal sorting module can be suitable for various communication isolation modules.

Further, in the air conditioner of the present invention, an outdoor unit switching power supply for supplying power to the outdoor unit control circuit, an outdoor unit power supply line for connecting the power supply line to the outdoor unit switching power supply, and an outdoor unit first switching element connected between the outdoor unit power supply line and the outdoor unit switching power supply are disposed in the outdoor unit. The outdoor unit first switching element is configured to controllably turn off the outdoor unit power supply line when the air conditioner is switched to the standby state, so that the outdoor unit switching power supply and the outdoor unit control circuit are powered off, which is beneficial to reducing the standby power consumption of the air conditioner and realizing energy conservation.

Furthermore, in the air conditioner of the present invention, the power signal sorting module is disposed in the outdoor unit and connected between the first switching element of the outdoor unit and the outdoor unit switching power supply, and when the outdoor unit switching element turns off the outdoor unit power line, the power signal sorting module is powered off. Compared with the scheme that the power signal sorting module is arranged on the indoor unit, the air conditioner can reduce the standby power consumption of the power signal sorting module, thereby further reducing the standby power consumption and saving electric energy.

Further, the air conditioner of the present invention further comprises an online component, which is used for connecting the indoor unit and the outdoor unit, and is configured to controllably connect a power line to the outdoor unit switching power supply or connect the second side of the indoor unit communication isolation module to the second side of the outdoor unit communication isolation module according to the working state of the air conditioner, so that the air conditioner of the present invention can automatically adjust the connection mode between the indoor unit and the outdoor unit according to the working state. The circuit structure of the air conditioner is improved by utilizing the on-line assembly, which is beneficial to simplifying a circuit, so that the air conditioner can utilize a power line to supply power to an outdoor unit switching power supply when the air conditioner is out of a standby state, a control circuit of the outdoor unit is electrified, the instant electrification function of the outdoor unit is realized, the outdoor unit is not required to be electrified in the standby state, and the communication between the indoor unit and the outdoor unit can be realized after the outdoor unit control circuit is electrified.

Furthermore, the on-line assembly of the air conditioner of the present invention includes a connecting line, an indoor unit switching assembly and an outdoor unit switching assembly. The connecting line comprises a first end used for being connected to the indoor unit and a second end used for being connected to the outdoor unit. The indoor unit switching component is arranged on the indoor unit and used for controllably connecting the first end of the connecting line to the power line or the communication interface of the indoor unit communication isolation module according to the working state of the air conditioner. The outdoor unit switching assembly is arranged on the outdoor unit and used for controllably connecting the second end of the connecting wire to the outdoor unit switching power supply or the communication interface of the outdoor unit communication isolation module according to the working state of the air conditioner. The invention can not only utilize the connecting wire to provide power for the outdoor unit switching power supply, but also utilize the connecting wire to realize the communication between the indoor unit and the outdoor unit, thereby realizing the multiplexing of the connecting wire, and being beneficial to further simplifying the circuit structure.

Furthermore, the air conditioner of the invention can be switched from the standby state to the running state only by controlling the indoor unit switching element, the outdoor unit first switching element and the outdoor unit second switching element, and can also be switched from the running state to the standby state which is favorable for low power consumption, thereby simplifying the circuit structure, simplifying the control process and being favorable for improving the automation degree.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic block diagram of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic circuit configuration diagram of an air conditioner according to an embodiment of the present invention;

fig. 3 is a schematic diagram of communication signals of respective optocouplers when performing communication between an indoor unit and an outdoor unit according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a circuit configuration of an air conditioner according to another embodiment of the present invention;

fig. 5 is a schematic diagram of a circuit configuration of an air conditioner according to still another embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic block diagram of an air conditioner 10 according to one embodiment of the present invention. The air conditioner 10 of the present embodiment may be a split type, and fig. 2 is a schematic circuit configuration diagram of the air conditioner 10 according to an embodiment of the present invention.

The air conditioner 10 generally includes a power cord 110, an indoor unit 120, an outdoor unit 130, and a power signal management module 180, and may further include an inline assembly.

The power line 110 is used for accessing an external power source, that is, the external power source supplies power to the indoor unit 120 and/or the outdoor unit 130 of the air conditioner 10 through the power line 110, for example, the external power source may provide power to the second side of the indoor unit communication isolation module 125, the second side of the outdoor unit communication isolation module 135, the outdoor unit switching power source U0, and other components. The external power supply can provide power frequency voltage for the air conditioner 10, for example, the power frequency voltage of the single-phase power supply in China is 220V at 50 Hz, and the power frequency voltage of the three-phase power supply is 380V at 50 Hz. The power cord 110 may include a hot wire L and a neutral wire N. The indoor unit 120 may be provided with a connector for connecting with the power cord 110. The power cord 110 is plugged into a socket in the environment in which the indoor unit 120 is operated, thereby providing a connection to an external power source.

An indoor unit control circuit 121 and an indoor unit communication isolation module 125 are disposed inside the indoor unit 120. The indoor unit control circuit 121 can be used to control operations of various devices (such as an indoor unit fan, an air guide plate, and the like) in the indoor unit 120, and also used to control communication between the indoor unit 120 and the outdoor unit 130.

In fig. 2, a dashed box 121 shows a partial circuit structure of the indoor unit control circuit 121, and a dashed box 125 shows an indoor unit communication isolation module 125. The indoor unit control circuit 121 may include an indoor unit master M1. The indoor unit control circuit 121 has a communication port. The indoor unit communication isolation module 125 has a first side and a second side, which are respectively used for connecting with the indoor unit control circuit 121 and the power line 110, so that there is no electrical direct connection between the circuits on the two sides of the indoor unit communication isolation module 125. The indoor unit control circuit 121 is connected to a first side of the indoor unit communication isolation module 125 through a communication port, and can send a communication signal to the outdoor unit 130 and/or receive a communication signal from the outdoor unit 130, so as to implement communication between the indoor unit 120 and the outdoor unit 130. The indoor unit communication isolation module 125 may include an indoor unit transmitting optocoupler U2 and an indoor unit receiving optocoupler U1.

An outdoor unit control circuit 131 and an outdoor unit communication isolating module 135 are disposed in the outdoor unit 130. The outdoor unit control circuit 131 can be used to control operations of various devices (such as an outdoor unit fan, a compressor, etc.) in the outdoor unit 130, and also used to control communication between the indoor unit 120 and the outdoor unit 130.

In fig. 2, a dotted line frame 131 shows a partial circuit structure of the outdoor unit control circuit 131, and a dotted line frame 135 shows an outdoor unit communication isolating module 135. The outdoor unit control circuit 131 may include an outdoor unit master M3. The outdoor unit control circuit 131 has a communication port. The outdoor unit communication isolating module 135 has a first side and a second side for connecting with the outdoor unit control circuit 131 and the power line 110, respectively, so that there is no electrical direct connection between the circuits of the two sides of the outdoor unit communication isolating module 135. The outdoor unit control circuit 131 is connected to the first side of the outdoor unit communication isolation module 135 through a communication port, and can send communication signals to the indoor units 120 and/or receive communication signals from the indoor units 120, so as to realize communication between the indoor units 120 and the outdoor unit 130. The outdoor unit communication isolation module 135 may include an outdoor unit transmitting optocoupler U4 and an outdoor unit receiving optocoupler U3.

The indoor machine main controller M1 and the outdoor machine main controller M3 can be both main control chips, and the main control chips can comprise a memory and a processor. The processor may be a Central Processing Unit (CPU), or a digital processing unit (DSP), etc. The memory is used for storing programs executed by the processor. The memory can be any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such.

And the indoor unit transmitting optocoupler U2, the indoor unit receiving optocoupler U1, the outdoor unit transmitting optocoupler U4, the outdoor unit receiving optocoupler U3 and the like form a communication circuit between the indoor unit 120 and the outdoor unit 130. Compared with the conventional bus communication circuit, the communication circuit of the embodiment does not need to be provided with a bus controller, and has the advantages of lower cost, larger level range, higher anti-interference performance and simple wiring.

The power signal grooming module 180 is shown in fig. 2 as a dashed box 180. The power signal management module 180 is connected to the power line 110 and the second side of the outdoor unit communication isolation module 135 and the second side of the indoor unit communication isolation module 125, that is, the power signal management module 180 directly provides working power to the second side of the outdoor unit communication isolation module 135 and the second side of the indoor unit communication isolation module 125. The power signal collating module 180 may be connected to the power line 110 through a wire. The power signal conditioning module 180 is configured to convert a power signal of an external power source into communication power signals required by the second side of the outdoor unit communication isolation module 135 and the second side of the indoor unit communication isolation module 125 to provide working power for the second side of the outdoor unit communication isolation module 135 and the second side of the indoor unit communication isolation module 125.

That is, the power signal arrangement module 180 is configured to convert the power signal flowing through the power line 110 from the external power source into the communication power signal required by the second side of the outdoor unit communication isolation module 135 and the second side of the indoor unit communication isolation module 125, for example, an ac voltage signal from the external power source may be converted into a dc voltage signal, and a voltage value of the dc voltage signal may be adjusted, so that the power signal arrangement module 180 can provide an appropriate working power to the second sides of the outdoor unit communication isolation module 135 and the indoor unit communication isolation module 125.

The air conditioner 10 of this embodiment, by improving the circuit structure and setting the power signal arrangement module 180 in the circuit, enables the air conditioner 10 to provide a proper working power supply for the second side of the indoor unit communication isolation module 125 and the second side of the outdoor unit communication isolation module 135, which can reduce or prevent the communication isolation module from being damaged, is beneficial to prolonging the service life of the whole air conditioner 10, and improves the reliability of communication between the indoor unit 120 and the outdoor unit 130.

The installation position of the power signal management module 180 can be selected according to actual needs, and can be installed in the indoor unit 120 or the outdoor unit 130. For example, when the power signal management module 180 is disposed in the indoor unit 120, an input end of the power signal management module 180 may be connected to the live line L of the power line 110, and an output end of the power signal management module 180 may be connected to the neutral line N of the power line 110 and the second side of the indoor unit communication isolation module 125.

In this embodiment, the power signal management module 180 may be disposed in the outdoor unit 130. The connection manner of the power signal arrangement module 180 in the outdoor unit 130 will be described in detail below.

The outdoor unit 130 may further include an outdoor unit switching power supply U0, an outdoor unit power supply line 110, and an outdoor unit first switching element K4. U0 in fig. 2 shows an outdoor unit switching power supply U0.

The outdoor unit switching power supply U0 is connected to the power line 110 and is configured to provide power to the outdoor unit control circuit 131. For example, when the outdoor unit switching power supply U0 is in the energized state, power may be supplied to the outdoor unit control circuit 131, thereby energizing the outdoor unit control circuit 131.

The outdoor unit power line 110 is used to connect the power line 110 to the outdoor unit switching power supply U0. That is, the power line 110 may be directly connected to the outdoor unit switching power supply U0 through the outdoor unit power line 110. For example, the outdoor unit power line 110 may be a power line between a point G3, a point G4 and an outdoor unit switching power source U0 in fig. 2.

The outdoor unit first switching element K4 is connected between the outdoor unit power line 110 and the outdoor unit switching power supply U0, and is configured to controllably control the on/off of the outdoor unit power line 110 according to the operating state of the air conditioner 10. For example, the outdoor unit first switching element K4 may be a fourth relay K4 in fig. 2, which has a contact 1 and a contact 2. And the outdoor unit first switching element K4 can be controlled by the outdoor unit main controller M3, that is, the coil of the fourth relay K4 is connected to the outdoor unit main controller M3. When the outdoor unit first switching element K4 is closed, the outdoor unit power line 110 is in an on state, and the outdoor unit power line 110 is directly connected to the outdoor unit switching power supply U0 through the outdoor unit power line 110. When the outdoor unit first switching element K4 is turned on, the outdoor unit power line 110 is in an off state, and at this time, the outdoor unit power line 110 cannot be connected to the outdoor unit switching power supply U0 through the outdoor unit power line 110.

In the process of switching the air conditioner 10 from the operation state to the standby state, the power supply circuit between the power line 110 and the outdoor unit switching power supply U0 may be turned off, so that the outdoor unit switching power supply U0 and the outdoor unit control circuit 131 are powered off. In this embodiment, the air conditioner 10 can control the outdoor unit power line 110 to be turned off by controlling the outdoor unit first switching element K4, so as to turn off the power supply circuit between the power line 110 and the outdoor unit switching power supply U0. The outdoor unit first switching element K4 is configured to controllably turn off the outdoor unit power supply line 110 in a case where the air conditioner 10 is switched to the standby state. By controlling the outdoor unit first switching element K4, the air conditioner 10 of the present embodiment can cut off the power of the outdoor unit switching power supply U0 and the outdoor unit control circuit 131 in the standby state, thereby reducing the standby power consumption of the air conditioner 10 and saving energy.

In this embodiment, the power signal management module 180 may be connected between the outdoor unit first switching element K4 and the outdoor unit switching power supply U0, for example, the outdoor unit power line 110 may be connected to the contact 1 of the outdoor unit first switching element K4, and both the power signal management module 180 and the outdoor unit switching power supply U0 may be connected to the contact 2 of the outdoor unit first switching element K4. When the outdoor unit power line 110 is turned off by the outdoor unit first switching element K4, the power signal collating module 180 is also powered off. Compared with the scheme that the power signal arrangement module 180 is disposed in the indoor unit 120, after the air conditioner 10 of the embodiment enters the standby state, the power signal arrangement module 180 is in the power-off state, and no electric energy is consumed, so that the standby power consumption of the power signal arrangement module 180 is reduced, and the standby zero power consumption of the power signal arrangement module 180 is realized, thereby further reducing the overall standby power consumption of the air conditioner 10 and saving electric energy.

During the process of switching the air conditioner 10 from the standby state to the operating state, and after the outdoor unit control circuit 131 is powered on, the outdoor unit first switching element K4 is configured to be controlled to switch on the outdoor unit power line 110, so as to supply power to the outdoor unit switching power supply U0 and the power signal sorting module 180 by using the power line 110, so that the outdoor unit switching power supply U0 and the power signal sorting module 180 are powered on, and thus the air conditioner 10 can be smoothly switched to the operating state.

Power signal conditioning module 180 may include a rectifier D1 and a voltage regulation component.

The rectifier D1 is configured to convert a power signal of an external power source into a dc voltage signal required by the second side of the outdoor unit communication isolation module 135 and the second side of the indoor unit communication isolation module 125. For example, the external power source may supply an ac voltage to the air conditioner 10, and the rectifier D1 may be a rectifier diode for converting an ac voltage signal from the external power source into a dc voltage signal. The rectifier D1 has an input terminal, i.e., an anode of the rectifier diode, and an output terminal, i.e., a cathode of the rectifier diode.

And the voltage regulating component is connected to the rectifier D1 and is used for regulating the voltage value of the direct-current voltage signal. The voltage regulating component may include a smoothing capacitor C1 and a voltage stabilizing component. A smoothing capacitor C1 may be connected to the output of the rectifier D1 for filtering the dc voltage signal. That is, the smoothing capacitor C1 can adjust the dc voltage signal to a smooth and reliable voltage signal. The voltage stabilizing component is used for adjusting the output voltage value of the smoothing capacitor C1 and is provided with a first resistor R1 connected to the input end of the rectifier D1, a Zener diode D2 and a second resistor R2 which are arranged in parallel with the smoothing capacitor C1, and the Zener diode D2 and the second resistor R2 are arranged in parallel with each other. The first resistor R1 and the second resistor R2 can be current-limiting resistors, and play a role in limiting current and dividing voltage, so that the flat wave capacitor C1 is prevented from being damaged due to overlarge charging current of the flat wave capacitor C1. The first resistor R1, the second resistor R2 and the zener diode D2 may form a voltage stabilizing circuit and are used to adjust the output voltage value of the smoothing capacitor C1, for example, the output voltage value of the smoothing capacitor C1 may be adjusted to be between ten and several volts and several tens of volts.

Because the model of communication isolation module on the market is various, the required working power supply of the communication isolation module's of different models second side often is different, this embodiment utilizes rectifier D1 and voltage regulation subassembly to mutually support, can adjust rectifier D1 and voltage regulation subassembly's each item parameter according to the required working power supply of communication isolation module, working power supply's control range has been guaranteed, this commonality that is favorable to improving power signal arrangement module 180, make power signal arrangement module 180 can be applicable to multiple communication isolation module.

The on-line component is used for connecting the indoor unit 120 and the outdoor unit 130, and is configured to controllably connect the power line 110 to the outdoor unit switching power supply U0 or connect the communication interface of the indoor unit communication isolation module 125 to the communication interface of the outdoor unit communication isolation module 135 according to the working state of the air conditioner 10. In fig. 2, point P1 shows a communication interface of the indoor unit communication isolation module 125, and point P3 shows a communication interface of the outdoor unit communication isolation module 135. That is, the on-line component is used to switch the connection mode between the indoor unit 120 and the outdoor unit 130. The connection mode of the on-line component connecting the indoor unit 120 and the outdoor unit 130 may be any one of the following connection modes: firstly, the power line 110 is connected to the outdoor unit switching power supply U0 to supply power to the outdoor unit switching power supply U0 by using the power line 110, and secondly, the communication interface of the indoor unit communication isolation module 125 is connected to the communication interface of the outdoor unit communication isolation module 135 to realize the communication between the indoor unit 120 and the outdoor unit 130.

When the air conditioner 10 of the present embodiment is in the standby state, the outdoor unit switching power supply U0 is powered off, and the outdoor unit control circuit 131 is powered off. Since the power line 110 is used for accessing an external power source, when the air conditioner 10 is switched from the standby state to the operating state, the on-line component connects the power line 110 to the outdoor unit switching power source U0, and at this time, the air conditioner 10 can use the power line 110 to supply power to the outdoor unit switching power source U0, so that the outdoor unit switching power source U0 is powered on. After the outdoor unit switching power supply U0 is powered on, power may be supplied to the outdoor unit control circuit 131, so that the outdoor unit control circuit 131 is powered on. When the inline component connects the power line 110 to the outdoor unit switching power supply U0, the inline component disconnects the communication interface of the indoor unit communication isolating module 125 from the communication interface of the outdoor unit communication isolating module 135.

After the outdoor unit control circuit 131 is powered on, the on-line component connects the communication interface of the indoor unit communication isolation module 125 to the communication interface of the outdoor unit communication isolation module 135, so that the indoor unit 120 communicates with the outdoor unit 130, and the air conditioner 10 can be switched to a normal operation state. When the on-line component connects the communication interface of the indoor unit communication isolation module 125 to the communication interface of the outdoor unit communication isolation module 135, the on-line component disconnects the power line 110 from the outdoor unit switching power supply U0.

By using the on-line component to switch the connection between the indoor unit 120 and the outdoor unit 130, the air conditioner 10 of this embodiment can not only use the power line 110 to supply power to the outdoor unit switching power supply U0 when exiting the standby state, so as to energize the outdoor unit control circuit 131, thereby realizing "instant energization" of the outdoor unit 130, so that the outdoor unit 130 does not need to be energized in the standby state, but also can realize communication between the indoor unit 120 and the outdoor unit 130 after the outdoor unit control circuit 131 is energized, which enables the air conditioner 10 of this embodiment to automatically connect the indoor unit 120 and the outdoor unit 130 according to the working state. The connection mode between the indoor unit 120 and the outdoor unit 130 is automatically switched by improving the circuit structure of the air conditioner 10 by using the on-line component, which is beneficial to simplifying the circuit.

By improving the circuit structure, the connection mode of the indoor unit 120 and the outdoor unit 130 is switched by the on-line component to realize the instant power on of the outdoor unit 130, when the air conditioner 10 is in the standby state, the outdoor unit 130 can be completely powered off, and only the indoor unit 120 is in the standby state, which can save the standby power consumption.

The on-line assembly can comprise a connecting line, an indoor unit switching assembly and an outdoor unit switching assembly.

The connection line has a first end for connecting to the indoor unit 120 and a second end for connecting to the outdoor unit 130. For example, the connection line may be a wire between the point P1 in fig. 2 and the contact 1 of the third relay K3.

The indoor unit switching component is disposed on the indoor unit 120, and is configured to controllably connect the first end of the connecting line to the power line 110 or the second side of the indoor unit communication isolation module 125 according to the operating state of the air conditioner 10. The outdoor unit switching component is disposed in the outdoor unit 130, and is configured to controllably connect the second end of the connection line to the outdoor unit switching power supply U0 or the communication interface of the outdoor unit communication isolating module 135 according to the working state of the air conditioner 10.

During the process of switching the air conditioner 10 from the standby state to the operating state, the indoor unit switching assembly connects the first end of the connection line to the power line 110, the outdoor unit switching assembly connects the second end of the connection line to the outdoor unit switching power supply U0, so that the outdoor unit switching power supply U0 is energized, so that the outdoor unit switching power supply U0 provides power to the outdoor unit control circuit 131, and after the outdoor unit switching power supply U0 provides power to the outdoor unit control circuit 131, the indoor unit switching assembly connects the first end of the connection line to the communication interface of the indoor unit communication isolation module 125, and the outdoor unit switching assembly connects the second end of the connection line to the communication interface of the outdoor unit communication isolation module 135.

That is, the air conditioner 10 of the present embodiment uses the connection lines, the indoor unit switching unit, and the outdoor unit switching unit to switch the connection method between the indoor unit 120 and the outdoor unit 130. The connection line is used to connect the indoor unit 120 and the outdoor unit 130, and the indoor unit switching component and the outdoor unit switching component are used to switch the connection mode of the first end and the second end of the connection line according to the working state of the air conditioner 10, and switch the connection mode between the indoor unit 120 and the outdoor unit 130 by switching the connection mode of the first end and the second end of the connection line.

The air conditioner 10 of this embodiment, through utilizing the connecting wire, the organic cooperation of a plurality of parts such as indoor set switch module and off-premises station switch module, switch the wiring mode of the first end and the second end of connecting wire, thereby adjust the connected mode between indoor set 120 and the off-premises station 130, make the air conditioner 10 pass through the automatic adjustment circuit, with the switching that adapts to operating condition, this mobility, flexibility and the variety that has improved the circuit structure of air conditioner 10, can satisfy normal user demand, can realize energy-conservation again, hold many birds with one stone.

The air conditioner 10 may have a plurality of operation states such as a standby state, an operation state, and the like. In the standby state, the air conditioner 10 is connected to the external power supply but does not perform any substantial operation, the outdoor unit switching power supply U0 is turned off, and the outdoor unit control circuit 131 is turned off. In the process of switching from the standby state to the operating state, the air conditioner 10 first connects the power line 110 to the outdoor unit switching power supply U0 by using the connection line to control the outdoor unit switching power supply U0 to be powered on, so that the outdoor unit control circuit 131 is powered on, and then controls the communication interface of the indoor unit communication isolation module 125 and the communication interface of the outdoor unit communication isolation module 135 to be connected by using the connection line to form a communication circuit, so that the indoor unit 120 and the outdoor unit 130 of the air conditioner 10 can operate according to the instruction of the user, and thus the adjustment of multiple parameters such as the indoor air temperature and humidity can be realized.

The air conditioner 10 of the present embodiment can supply power to the outdoor unit switching power supply U0 by using the connection lines, and can realize communication between the indoor unit 120 and the outdoor unit 130 by using the connection lines, which realizes multiplexing of the connection lines, which is advantageous to further simplify the circuit structure. The connection line may be a wire.

The indoor unit switching assembly may include an indoor unit power supply line and an indoor unit switching element K1. The indoor unit power supply line is used for connecting the power supply line 110. That is, the indoor unit power supply line is used to connect the power supply line 110 and the first end of the connection line. For example, the indoor unit power supply line may be a line between G1 point and the first relay K1 contact 1 in fig. 2. The indoor unit switching element K1 is connected between the indoor unit power supply line and the first end of the connection line, and is used for controllably controlling the on/off of the indoor unit power supply line according to the working state of the air conditioner 10. The indoor unit switching element K1 may be the first relay K1 in fig. 2. And the indoor unit switching element K1 can be controlled by an indoor unit main controller M1 of the indoor unit control circuit 121. I.e. the coil of the first relay K1 is connected to the indoor unit master M1. The contact 2 of the first relay K1 is connected to a first end of the connecting line.

That is, the air conditioner 10 switches the connection mode of the first end of the connection line by the indoor unit switching element K1. The connection mode of the first end of the connection line may be any one of the following connection modes: the first end of the connecting line is connected to the power line 110, and the second end of the connecting line is connected to the communication interface of the indoor unit communication isolation module 125. When the indoor unit switching element K1 is closed, the indoor unit power supply line is in an on state, at which the first end of the connection line is connected to the power supply line 110. When the indoor unit switching element K1 is turned on, the indoor unit power supply line is in an off state, and the first end of the connection line is connected to the communication interface of the indoor unit communication isolation module 125. In this embodiment, the indoor unit power supply line may be connected to the live line L of the power supply line 110.

The outdoor unit switching assembly may include an outdoor unit power supply line, an outdoor unit communication line, and an outdoor unit second switching element K3.

The outdoor unit power supply line is used for connecting an outdoor unit switching power supply U0. That is, the outdoor unit power supply line is used to connect the outdoor unit switching power supply U0 and the second end of the connection line. For example, the outdoor unit power supply line may be a line between the contact 2 and the G2 point of the third relay K3 in fig. 2. The outdoor unit communication line is used to connect the communication interface of the outdoor unit communication isolation module 135. That is, the outdoor unit communication line is used to connect the communication interface of the outdoor unit communication isolating module 135 and the second end of the connection line. For example, the outdoor unit communication line may be a connection line between the contacts 3 and P3 of the third relay K3 in fig. 2.

The outdoor unit second switching element K3 may be a third relay K3 in fig. 2, and the third relay K3 is a single-pole double-throw relay. The outdoor unit second switching member K3 has a moving contact (contact 1 of the K3 relay in fig. 2), a first stationary contact (contact 2 of the K3 relay in fig. 2), and a second stationary contact (contact 3 of the K3 relay in fig. 2), the moving contact thereof is connected to the second end of the connection line, the first stationary contact thereof is connected to the outdoor unit power supply line, the second stationary contact thereof is connected to the outdoor unit communication line, and the outdoor unit second switching member K3 is for controllably controlling the opening and closing of the first stationary contact and the second stationary contact according to the operating state of the air conditioner 10. The power supply line of the outdoor unit can be controlled to be switched on and off by controlling the first fixed contact to be switched on and off, and the communication line of the outdoor unit can be controlled to be switched on and off by controlling the second fixed contact to be switched on and off. And the second switching element K3 of the outdoor unit can be controlled by the outdoor unit master M3 of the outdoor unit control circuit 131. I.e. the coil of the third relay K3 is connected to the outdoor unit master M3. When the outdoor unit control circuit 131 is powered on, the outdoor unit main controller M3 can control the opening and closing of the first stationary contact and the second stationary contact in the outdoor unit second switching element K3.

That is, the air conditioner 10 uses the outdoor unit second switching element K3 to switch the connection mode of the second end of the connection line. The connection mode of the second end of the connection line may be any one of the following connection modes: the second end of the connecting wire is connected to the outdoor unit switching power supply U0, and the second end of the connecting wire is connected to the communication interface of the outdoor unit communication isolation module 135. When the first stationary contact of the second switching element K3 of the outdoor unit is closed, the second stationary contact is opened, the power supply line of the outdoor unit is in an on state, the outdoor unit communication line is in an off state, and the second end of the connection line is connected to the outdoor unit switching power supply U0. When the second stationary contact of the second switching element K3 of the outdoor unit is closed, the first stationary contact is opened, the outdoor unit communication line is in an on state, the outdoor unit power supply line is in an off state, and the second end of the connection line is connected to the communication interface of the outdoor unit communication isolation module 135.

In this embodiment, the power line 110 is connected to the outdoor unit switching power supply U0 by any one of the following connection methods: firstly, the power line 110 can be connected to the outdoor unit switch power supply U0 through an indoor unit power supply line, a connecting line and an outdoor unit power supply line in sequence; and the outdoor unit switching power supply U0 can be directly connected only through the outdoor unit power supply line 110. The on-off of the indoor machine power supply line is controlled by the indoor machine switching element K1, the on-off of the outdoor machine power supply line is controlled by the outdoor machine second switching element K3, and the on-off of the outdoor machine power supply line 110 is controlled by the outdoor machine first switching element K4. That is, the air conditioner 10 can switch the connection between the power line 110 and the outdoor unit switching power supply U0 by controlling the open/close states of the indoor unit switching element K1, the outdoor unit first switching element K4, and the outdoor unit second switching element K3.

In the process of switching the air conditioner 10 from the standby state to the operating state, the first connection mode may be first adopted to connect the power line 110 to the outdoor unit switching power supply U0, in order to energize the outdoor unit switching power supply U0, so as to provide power for the outdoor unit control circuit 131, after the outdoor unit control circuit 131 is energized, the second connection mode may be adopted to connect the power line 110 to the outdoor unit switching power supply U0, and the first connection mode is disconnected, in order to enable the indoor unit 120 and the outdoor unit 130 to communicate by using the connection line, and the power line 110 is used to directly supply power to the outdoor unit switching power supply U0 through the outdoor unit power line 110.

During the process of switching the air conditioner 10 from the operation state to the standby state, the communication circuit between the indoor unit 120 and the outdoor unit 130 may be turned off, and the power supply circuit between the power line 110 and the outdoor unit switching power supply U0 may be turned off, so that the outdoor unit switching power supply U0 and the outdoor unit control circuit 131 are powered off.

The air conditioner 10 of the embodiment can be switched to the operation state from the standby state smoothly by controlling the indoor unit switching element K1, the outdoor unit first switching element K4 and the outdoor unit second switching element K3, and can also be switched to the low-power consumption standby state from the operation state of the air conditioner 10, so that the circuit structure is simplified, the control process is simplified, and the improvement of the automation degree is facilitated.

The circuit configuration of the air conditioner 10 and the circuit switching process are further described below in connection with the operation state switching process of the air conditioner 10.

During the switching of the air conditioner 10 from the standby state to the operating state: the indoor unit main controller M1 controls the indoor unit switching element K1 to be closed, so that the power supply line of the indoor unit is connected, and the first end of the connecting line is connected to the power line 110; at this time, the first stationary contact of the outdoor unit second switching element K3 is closed, the second stationary contact is open, that is, the outdoor unit power supply line is in an on state, the outdoor unit communication line is in an off state, and the second end of the connection line is connected to the outdoor unit switching power supply U0, so that the power supply line 110 supplies power to the outdoor unit switching power supply U0 through the indoor unit power supply line, the connection line and the outdoor unit power supply line, so as to energize the outdoor unit switching power supply U0; after the outdoor unit switching power supply U0 is powered on, power can be supplied to the outdoor unit control circuit 131 to power on the outdoor unit control circuit 131; after the outdoor unit control circuit 131 is powered on, the outdoor unit main controller M3 controls the outdoor unit first switching element K4 to be closed, so that the outdoor unit power line 110 is connected, controls the second stationary contact of the outdoor unit second switching element K3 to be closed and controls the first stationary contact to be opened, so that the outdoor unit communication line is connected and the outdoor unit power supply line is disconnected, and controls the indoor unit switching element K1 to be opened and controls the indoor unit power supply line to be disconnected, at this time, the first end of the connecting line is connected to the communication interface of the indoor unit communication isolation module 125, and the second end of the connecting line is connected to the communication interface of the outdoor unit communication isolation module 135, so that the indoor unit 120 and the outdoor unit 130 realize communication through the connecting line.

During the switching of the air conditioner 10 from the operating state to the standby state: the outdoor unit main controller M3 controls the first stationary contact of the outdoor unit second switching element K3 to be closed and the second stationary contact to be opened, at this time, the second end of the connecting line is connected to the outdoor unit switching power supply U0, and controls the outdoor unit first switching element K4 to be opened, so that the outdoor unit power line 110 is turned off, and thus the outdoor unit switching power supply U0 and the outdoor unit control circuit 131 are powered off, and low-power standby is realized. Note that, since the indoor unit switching element K1 remains open at this time, the power supply line 110 cannot supply power to the outdoor unit switching power supply U0 through the indoor unit power supply line, the connection line, and the outdoor unit power supply line. And, after the outdoor unit power line 110 is turned off by controlling the outdoor unit first switching element K4 to be opened, the power signal collating module 180 is powered off.

The indoor communication isolation module 125 and the outdoor communication isolation module 135 are further described below in connection with a communication process between the indoor unit 120 and the outdoor unit 130. The internal voltages Vceo of triodes of the indoor unit transmitting optocoupler U2 and the outdoor unit transmitting optocoupler U4 can be 350V, and the internal voltages Vceo of triodes of the indoor unit receiving optocoupler U1 and the outdoor unit receiving optocoupler U3 can be 80V. In fig. 2, a shows an anode of the diode, K shows a cathode of the diode, C shows a collector of the transistor, and E shows an emitter of the transistor.

And the indoor unit emission optocoupler U2 is used for connecting a communication sending end of the indoor unit main controller M1. And the indoor unit receiving optocoupler U1 is used for connecting a communication receiving end of the indoor unit main controller M1. The transmitting side of the indoor unit transmitting optocoupler U2 is connected with the receiving side of the indoor unit receiving optocoupler U1 and serves as a communication interface of the indoor unit communication isolation module 125. The first side of the indoor unit emission optocoupler U2 is connected with a communication sending end of the indoor unit main controller M1, and the emission side of the indoor unit emission optocoupler U2 is the other side opposite to the first side of the indoor unit emission optocoupler U2. The first side of the indoor unit receiving optocoupler U1 is used for being connected with a communication receiving end of the indoor unit main controller M1, and the receiving side of the indoor unit receiving optocoupler U1 is the other side opposite to the first side of the indoor unit receiving optocoupler U1.

And the outdoor unit transmitting optocoupler U4 is used for connecting a communication transmitting end of an outdoor unit main controller M3. And the outdoor unit receiving optocoupler U3 is used for connecting a communication receiving end of the outdoor unit main controller M3. The transmitting side of the outdoor unit transmitting optocoupler U4 is connected with the receiving side of the outdoor unit receiving optocoupler U3 and is used as a communication interface of the outdoor unit communication isolation module 135. The first side of the outdoor unit transmitting optocoupler U4 is connected with the communication transmitting end of the outdoor unit main controller M3, and the transmitting side of the outdoor unit transmitting optocoupler U4 is the other side opposite to the first side of the outdoor unit transmitting optocoupler U4. The first side of the outdoor unit receiving optocoupler U3 is used for being connected with a communication receiving end of the outdoor unit main controller M3, and the receiving side of the outdoor unit receiving optocoupler U3 is the other side opposite to the first side of the outdoor unit receiving optocoupler U3.

Fig. 3 is a schematic diagram of communication signals of the respective optical couplers when the indoor unit 120 and the outdoor unit 130 perform communication according to an embodiment of the present invention, and fig. 3 (a) illustrates communication signals of the respective optical couplers when the indoor unit 120 transmits a communication signal to the outdoor unit. When the indoor unit 120 sends a communication signal to the outdoor unit 130, the outdoor unit emitting optocoupler U4 is firstly switched on, the indoor unit 120 sends a communication signal through the indoor unit emitting optocoupler U2, the outdoor unit 130 receives the communication signal sent by the indoor unit 120 through the outdoor unit receiving optocoupler U3, meanwhile, the indoor unit 120 can receive the communication signal sent by the indoor unit 120 through the indoor unit receiving optocoupler U1, and if the communication signal is wrong, the communication signal can be sent again.

Fig. 3 (b) shows communication signals of the respective photo-couplers when the outdoor unit 130 transmits a communication signal to the indoor unit 120. When the outdoor unit 130 sends a communication signal to the indoor unit 120, the indoor unit transmitting optocoupler U2 is firstly connected, the outdoor unit 130 sends a communication signal through the outdoor unit transmitting optocoupler U4, the indoor unit receives the communication signal sent by the outdoor unit 130 through the indoor unit receiving optocoupler U1, and meanwhile, the outdoor unit 130 receives the communication signal sent by the outdoor unit 130 through the outdoor unit receiving optocoupler U3, and if the communication signal is wrong, the communication signal can be sent again.

The indoor unit 120 of this embodiment may further include an indoor unit forward diode D3 and an indoor unit current limiting resistor R3, which are sequentially connected to the collector of the indoor unit emitting optocoupler U2. The cathode of the indoor unit forward diode D3 may be connected to the collector of the indoor unit receiving optocoupler U1. The anode of the indoor unit forward diode D3 may be connected to the indoor unit current limiting resistor R3. The indoor unit current limiting resistor R3 is used for limiting current. The indoor unit forward diode D3 serves to prevent a reverse current from flowing.

The outdoor unit 130 may further include an outdoor unit forward diode D4 and an outdoor unit current limiting resistor R4, which are sequentially connected to a cathode of the outdoor unit receiving optocoupler U3. An anode of the outdoor unit forward diode D4 may be connected to a cathode of the outdoor unit receiving optocoupler U3, and a cathode of the outdoor unit forward diode D4 may be connected to the outdoor unit current limiting resistor R4. The outdoor unit current limiting resistor R4 is used for limiting current. The outdoor unit forward diode D4 serves to prevent a reverse current from flowing.

Fig. 4 is a schematic diagram of a circuit configuration of an air conditioner 10 according to still another embodiment of the present invention. In some further embodiments, the indoor unit of the air conditioner 10 may be plural. Fig. 4 only illustrates the case where there are two indoor units, and the circuit structure of the air conditioner 10 is illustrated, and those skilled in the art should be able to expand the case where there are more than two indoor units based on the understanding of the present embodiment. The dotted line frame 121 and the dotted line frame 125 in fig. 4 show the main circuit structures inside the first indoor unit 120, and are the same as the main circuit structures inside the indoor unit 120 shown by the dotted line frame 121 and the dotted line frame 125 in fig. 2; the main circuit configuration inside the outdoor unit 130 shown by the dotted line frame 180, the dotted line frame 131, and the dotted line frame 135 in fig. 4 is the same as the main circuit configuration inside the outdoor unit 130 shown by the dotted line frame 180, the dotted line frame 131, and the dotted line frame 135 in fig. 2. In fig. 4, compared with fig. 2, the circuit configurations shown by the broken line frame 151, the broken line frame 155, the broken line frame 181, and the broken line frame 136 are mainly added, and the third relay K3 is changed. The circuit configurations in the dashed line frame 151 and the dashed line frame 155 show the main circuit configuration added to the inside of another indoor unit (i.e., the second indoor unit), and correspondingly, the circuit configurations in the dashed line frame 181 and the dashed line frame 136 show the main circuit configuration added to the inside of the outdoor unit 130.

When there are two indoor units, the air conditioner 10 includes a power line, a first indoor unit 120, a second indoor unit, an outdoor unit 130, a power signal sorting module 180, and an online component.

The power supply line may be a common one; alternatively, the power lines may include a first power line corresponding to the first indoor unit 120 and a second power line corresponding to the second indoor unit. The first indoor unit 120 has a first indoor unit control circuit 121 and a first indoor unit communication isolation module 125, and a first side of the first indoor unit communication isolation module 125 is connected to a communication port of the first indoor unit control circuit 121. The second indoor unit has a second indoor unit control circuit 151 and a second indoor unit communication isolation module 155, and a first side of the second indoor unit communication isolation module 155 is connected to a communication port of the second indoor unit control circuit 151.

The outdoor unit 130 has an outdoor unit control circuit 131, an outdoor unit communication isolating module, an outdoor unit switching power supply U0, an outdoor unit power supply line 110, and an outdoor unit first switching element K4. The outdoor unit control circuit 131 has an outdoor unit first communication port for communicating with the first indoor unit 120, and an outdoor unit second communication port for communicating with the second indoor unit. The outdoor unit communication isolation module includes an outdoor unit first communication isolation module 135 and an outdoor unit second communication isolation module 136. A first side of the outdoor unit first communication isolating module 135 is connected to the outdoor unit first communication port. And the outdoor unit first communication isolating module 135 is used to form a communication circuit with the first indoor unit communication isolating module 125. The second side of the outdoor unit second communication isolating module 136 is connected to the outdoor unit second communication port. And the outdoor unit second communication isolating module 136 is used for forming a communication circuit with the second indoor unit communication isolating module 155.

That is, the first indoor unit communication isolation module 125 and the outdoor unit first communication isolation module 135 form a first communication circuit for the first indoor unit 120 to communicate with the outdoor unit 130. The second indoor unit communication isolation module 155 and the outdoor unit second communication isolation module 136 form a second communication circuit for the second indoor unit to communicate with the outdoor unit 130.

The number of the power signal sorting modules may be two, and the two power signal sorting modules include a first power signal sorting module 180 and a second power signal sorting module 181. The first power signal arrangement module 180 is configured to provide power to the second side of the first indoor unit communication isolation module 125 and the second side of the outdoor unit first communication isolation module 135 in the first communication circuit. The first power signal management module 180 can be connected to the first power line 110, the second side of the outdoor unit first communication isolation module 135 and the second side of the first indoor unit communication isolation module 125. The second power signal management module 181 is configured to provide power to the second side of the second indoor unit communication isolation module 155 and the second side of the outdoor unit second communication isolation module 136 in the second communication circuit. The second power signal management module 181 can connect the second power line 110, the second side of the outdoor unit second communication isolation module 136, and the second side of the second indoor unit communication isolation module 155.

The indoor unit control circuit of each indoor unit comprises an indoor unit main controller. The communication isolation module of each indoor unit comprises an indoor unit transmitting optocoupler and an indoor unit receiving optocoupler. Each communication isolation module in the outdoor unit 130 includes an outdoor unit transmitting optocoupler and an outdoor unit receiving optocoupler.

The connection lines of the connection assembly are two, and include a first connection line for connecting the first indoor unit 120 and the outdoor unit 130, and a second connection line for connecting the second indoor unit and the outdoor unit 130.

The indoor unit switching assemblies are two, and include a first indoor unit switching assembly disposed in the first indoor unit 120 and a second indoor unit switching assembly disposed in the second indoor unit. The first indoor unit switching assembly comprises a first indoor unit power supply line and a first indoor unit switching element K1. The second indoor unit switching assembly includes a second indoor unit power supply line and a second indoor unit switching element K2.

The outdoor unit switching assembly comprises an outdoor unit first communication line arranged corresponding to the first indoor unit, an outdoor unit second communication line arranged corresponding to the second indoor unit, an outdoor unit power supply line used for connecting an outdoor unit switching power supply U0 and an outdoor unit second switching element K3. Compared with the embodiment shown in fig. 2, the outdoor unit switching assembly of the present embodiment changes the second switching element K3 of the outdoor unit, i.e., the third relay K3, and further adds the second communication line of the outdoor unit corresponding to the second indoor unit.

The circuit configuration of the first indoor unit in fig. 4 is the same as that of the indoor unit shown in fig. 2, and therefore, the circuit configuration of the second indoor unit, the second connection line, the additional circuit configuration inside the outdoor unit 130, and the converted third relay K3 will be described in detail below.

As shown in fig. 4, the indoor unit main controller of the second indoor unit control circuit 151 is M2, the indoor unit transmitting optocoupler is U6, and the indoor unit receiving optocoupler is U5. The second indoor unit switching element K2 can be a second relay K2 in fig. 4, which has a contact 1 and a contact 2. The second indoor machine switching element K2 is controlled by an indoor machine main controller M2. The second indoor unit power supply line may be a line between point G1 and contact 1 of the second relay K2 in fig. 4.

The first connecting line is an electric wire between P1 point in fig. 4 and contact 1 of the third relay K3. The second connection line is a wire between point P2 in fig. 4 and contact 4 of the third relay K3.

Each indoor unit needs to communicate with the outdoor unit 130. The outdoor unit 130 of this embodiment is additionally provided with an outdoor unit second communication isolation module 136 specially used for performing communication connection with a second indoor unit, that is, an outdoor unit transmitting optocoupler U8 and an outdoor unit receiving optocoupler U7. The outdoor unit first communication line is a connection line between the contacts 3 and P3 of the third relay K3 in fig. 4. The second communication line of the outdoor unit is a connection line between the contact 6 of the third relay K3 and the contact P4 in fig. 4. The outdoor unit power supply line is a line between the contact point 5 and the point G2 of the third relay K3 in fig. 4.

The third relay K3 is a double-pole double-throw relay having a first movable contact (i.e., contact 1), a first stationary contact (i.e., contact 2), and a second stationary contact (i.e., contact 3) for arrangement corresponding to the first indoor unit, and further having a second movable contact (i.e., contact 4), a third stationary contact (i.e., contact 5), and a fourth stationary contact (i.e., contact 6) for arrangement corresponding to the second indoor unit. The first movable contact is connected with the second end of the first connecting line, and the second movable contact is connected with the second end of the second connecting line. The first static contact is connected with a power supply line of the outdoor unit, and the second static contact is connected with a first communication line of the outdoor unit. The third static contact is connected with a power supply line of the outdoor unit, and the fourth static contact is connected with a second communication line of the outdoor unit.

The circuit configuration and the circuit switching process of the air conditioner 10 in the present embodiment are further described below in conjunction with the operation state switching process of the air conditioner 10. It should be noted that, in this embodiment, the operating states of the two indoor units do not affect each other. Any one of the indoor units can realize the 'instant power on' of the outdoor unit 130.

Take the second indoor unit as an example. During the switching of the second indoor unit of the air conditioner 10 from the standby state to the operating state: controlling a second indoor unit switching element K2 to be closed to enable a power supply line of the second indoor unit to be connected, wherein the first end of a second connecting line is connected to a second power line; at this time, the third stationary contact of the second switching element K3 of the outdoor unit is closed, and the fourth stationary contact is opened, that is, the power supply line of the outdoor unit is in an on state, the second communication line of the outdoor unit is in an off state, and the second end of the second connection line is connected to the switching power supply U0 of the outdoor unit, so that the second power line supplies power to the switching power supply U0 of the outdoor unit through the second power supply line of the indoor unit, the second connection line and the power supply line of the outdoor unit, so that the switching power supply U0 of the outdoor unit is powered on; after the outdoor unit switching power supply U0 is powered on, power can be supplied to the outdoor unit control circuit 131 to power on the outdoor unit control circuit 131; after the outdoor unit control circuit 131 is powered on, the outdoor unit first switching element K4 is controlled to be closed, the outdoor unit power line 110 is connected, the fourth stationary contact of the outdoor unit second switching element K3 is controlled to be closed, the third stationary contact of the outdoor unit second switching element K3 is controlled to be opened, the outdoor unit second communication line is connected, the outdoor unit power supply line is disconnected, the second indoor unit switching element K2 is controlled to be opened, the second indoor unit power supply line is disconnected, at this time, the first end of the second connecting line is connected to the communication interface of the second indoor unit communication isolation module 155, the second end of the second connecting line is connected to the communication interface of the outdoor unit second communication isolation module 136, and therefore the second indoor unit and the outdoor unit 130 are enabled to communicate through the second connecting line.

In the process of switching the second indoor unit of the air conditioner 10 from the operating state to the standby state: and controlling the third stationary contact of the second switching element K3 of the outdoor unit to be closed and the fourth stationary contact to be opened, wherein the second end of the second connecting line is connected to the outdoor unit switching power supply U0, and controlling the first switching element K4 of the outdoor unit to be opened, so that the outdoor unit power supply line 110 is turned off, and the outdoor unit switching power supply U0 and the outdoor unit control circuit 131 are powered off, thereby realizing low-power standby. Note that, since the second indoor unit switching element K2 is kept open at this time, the second power line 110 cannot supply power to the outdoor unit switching power supply U0 through the second indoor unit power supply line, the second connection line, and the outdoor unit power supply line. And, after the outdoor unit power line 110 is turned off by controlling the outdoor unit first switching element K4 to be opened, the power signal collating module 180 is powered off.

In the above embodiment, the indoor unit power supply line may be connected to the live line L of the power supply line 110.

Fig. 5 is a schematic diagram of a circuit configuration of an air conditioner 10 according to still another embodiment of the present invention.

In still further embodiments, the connection between the indoor unit power supply line and the power line 110 can be changed. The indoor unit power supply line of the indoor unit can be connected to the neutral line N of the power supply line 110, which can improve the safety and reliability of the circuit switching process.

The air conditioner 10 of the present embodiment includes a power cord 110, an indoor unit, an outdoor unit 130, and a power signal management module 180. By improving the circuit structure of the air conditioner 10, the power signal sorting module 180 is utilized to convert the power signal of the external power source into the communication power signal required by the second side of the indoor unit communication isolation module 125 and the second side of the outdoor unit communication isolation module 135, so as to provide the working power source for the second side of the outdoor unit communication isolation module 135 and the second side of the indoor unit communication isolation module 125, so that the air conditioner 10 can provide the proper working power source for the second sides of the communication isolation modules of the indoor unit and the outdoor unit 130, which can reduce or avoid the communication isolation module from being damaged, and improve the service life of the whole air conditioner 10.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. An air conditioner comprising:

the power line is used for accessing an external power supply;

indoor set, be provided with in it:

an indoor unit control circuit;

the first side of the indoor unit communication isolation module is connected with a communication port of the indoor unit control circuit;

the off-premises station, be provided with in it:

an outdoor unit control circuit;

the first side of the outdoor unit communication isolation module is connected with a communication port of the outdoor unit control circuit;

the power supply signal sorting module is connected with the power supply line, the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module, and is configured to convert the power supply signal of the external power supply into communication power supply signals required by the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module so as to provide working power supplies for the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module;

the outdoor unit further includes:

the outdoor unit switching power supply is connected to the power line and is used for supplying power to the outdoor unit control circuit;

an outdoor unit power line for connecting the power line to the outdoor unit switching power supply;

the outdoor unit first switching element is connected between the outdoor unit power line and the outdoor unit switching power supply and used for controllably controlling the on-off of the outdoor unit power line according to the working state of the air conditioner;

the power signal sorting module is arranged in the outdoor unit and is connected between a first switching element of the outdoor unit and the outdoor unit switching power supply;

the air conditioner further includes: the on-line assembly is used for connecting the indoor unit and the outdoor unit and is configured to controllably connect the power line to the outdoor unit switching power supply or connect the communication interface of the indoor unit communication isolation module to the communication interface of the outdoor unit communication isolation module according to the working state of the air conditioner;

the inline assembly includes:

a connection line having a first end for connecting to the indoor unit and a second end for connecting to the outdoor unit;

the indoor unit switching component is arranged on the indoor unit and used for controllably connecting the first end of the connecting line to the power line or the second side of the indoor unit communication isolation module according to the working state of the air conditioner;

the outdoor unit switching assembly is arranged on the outdoor unit and used for controllably connecting the second end of the connecting line to the outdoor unit switching power supply or the communication interface of the outdoor unit communication isolation module according to the working state of the air conditioner;

the outdoor unit switching assembly includes:

an outdoor unit power supply line for connecting the outdoor unit switching power supply;

the outdoor unit communication line is used for connecting the outdoor unit communication interface;

and the second switching element of the outdoor unit is used for controllably controlling the first static contact and the second static contact to be opened and closed according to the working state of the air conditioner.

2. The air conditioner according to claim 1, wherein

The outdoor unit first switching element is configured to controllably turn off the outdoor unit power supply line in a case where the air conditioner is switched to a standby state, and is further configured to controllably turn on the outdoor unit power supply line in a process where the air conditioner is switched from the standby state to an operation state.

3. The air conditioner as claimed in claim 1, wherein

The power signal arrangement module comprises:

the rectifier is used for converting a power supply signal of the external power supply into a direct-current voltage signal required by the second side of the outdoor unit communication isolation module and the second side of the indoor unit communication isolation module;

and the voltage regulating component is connected to the rectifier and used for regulating the voltage value of the direct-current voltage signal.

4. The air conditioner according to claim 3, wherein

The voltage regulation assembly includes:

the smoothing capacitor is connected to the output end of the rectifier and is used for filtering the direct-current voltage signal;

and the voltage stabilizing component is used for adjusting the output voltage value of the smoothing capacitor and is provided with a first resistor connected to the input end of the rectifier, and a Zener diode and a second resistor which are connected with the smoothing capacitor in parallel.

5. The air conditioner according to claim 1, wherein

The indoor unit switching assembly comprises:

the indoor unit power supply line is used for connecting the power supply line;

and the indoor unit switching element is connected between the indoor unit power supply line and the first end of the connecting line and is used for controllably controlling the on-off of the indoor unit power supply line according to the working state of the air conditioner.

6. The air conditioner according to claim 5, wherein

In the process that the air conditioner is switched from the standby state to the running state, the indoor unit switching assembly connects the first end of the connecting wire to the power wire, the outdoor unit switching assembly connects the second end of the connecting wire to the outdoor unit switching power supply to electrify the outdoor unit switching power supply, so that the outdoor unit switching power supply supplies power to the outdoor unit control circuit, after the outdoor unit switching power supply supplies power to the outdoor unit control circuit, the indoor unit switching assembly connects the first end of the connecting wire to the communication interface of the indoor unit communication isolation module, and the outdoor unit switching assembly connects the second end of the connecting wire to the communication interface of the outdoor unit communication isolation module.