CN111306745A - Power supply circuit, control method, air conditioner, and computer-readable storage medium - Google Patents

Power supply circuit, control method, air conditioner, and computer-readable storage medium Download PDF

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Publication number
CN111306745A
CN111306745A CN202010134050.4A CN202010134050A CN111306745A CN 111306745 A CN111306745 A CN 111306745A CN 202010134050 A CN202010134050 A CN 202010134050A CN 111306745 A CN111306745 A CN 111306745A
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CN
China
Prior art keywords
transmission interface
power transmission
current
circuit
power
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Granted
Application number
CN202010134050.4A
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Chinese (zh)
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CN111306745B (en
Inventor
陈葆荣
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Priority to CN202010134050.4A priority Critical patent/CN111306745B/en
Publication of CN111306745A publication Critical patent/CN111306745A/en
Application granted granted Critical
Publication of CN111306745B publication Critical patent/CN111306745B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits

Abstract

The invention provides a power supply circuit, a control method, an air conditioner and a computer readable storage medium. Wherein, supply circuit includes: a power transmission interface; the switch circuit is connected with the power transmission interface and is used for controlling the power-on state of the power transmission interface; the reversing circuit is arranged between the switching circuit and the power transmission interface and is used for controlling the current transmission direction of the power transmission interface; the controller is connected with the control end of the switch circuit and the control end of the reversing circuit and used for determining the current state on the power transmission interface; controlling the action of the switching circuit and/or the reversing circuit according to the current state on the power transmission interface; the current state is a power-on state on the power transmission interface and/or a current direction of the power transmission interface for transmitting current. The wiring number of the whole air conditioner system is simplified, the difficulty of wiring and installation is reduced, and the flexibility of the whole power supply structure of the air conditioner system is improved.

Description

Power supply circuit, control method, air conditioner, and computer-readable storage medium
Technical Field
The invention relates to the technical field of air conditioner power supply, in particular to a power supply circuit, a control method of the power supply circuit, an air conditioner and a computer readable storage medium.
Background
The power supply of the indoor unit and the power supply of the outdoor unit are generally supplied separately. Each indoor unit of the multi-split air conditioning system is provided with an independent power supply. According to the use habits of different users, the power supply of the indoor unit can be turned off when the indoor unit is out or not used. Generally, an electronic expansion valve of a power-down internal machine needs to be controlled, and other power supplies need to be connected to the electronic expansion valve of the power-down internal machine to be controlled.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention provides a supply circuit.
A second aspect of the invention provides a control method of a power supply circuit.
A third aspect of the present invention provides an air conditioner.
A fourth aspect of the invention provides a computer-readable storage medium.
In order to achieve the above object, according to an aspect of the first aspect of the present invention, there is provided a power supply circuit including: a power transmission interface; the switch circuit is connected with the power transmission interface and is used for controlling the power-on state of the power transmission interface; the reversing circuit is arranged between the switching circuit and the power transmission interface and is used for controlling the current transmission direction of the power transmission interface; the controller is connected with the control end of the switch circuit and the control end of the reversing circuit and used for determining the current state on the power transmission interface; controlling the action of the switching circuit and/or the reversing circuit according to the current state on the power transmission interface; the current state is a power-on state on the power transmission interface and/or a current direction of the power transmission interface for transmitting current.
In the technical scheme, the power supply circuit comprises a power transmission interface, a switch circuit, a reversing circuit and a controller, one end of the power transmission interface is connected with an indoor unit of the air conditioner needing to be powered, the other end of the power transmission interface is connected with a power supply and a grounding end through a lead, the power transmission interface forms a loop with the power supply and the grounding end through leads, current flows to the grounding end from the power supply through the power transmission interface through the leads, the switch circuit is arranged on the leads and connected with the power transmission interface and used for controlling the power-on state of the power transmission interface, namely the switch circuit is in a closed state, the power transmission interface is in a power-on state, the switch circuit is in a disconnected state, the power transmission interface is in a power-off state, the lead is also provided with the reversing circuit, the reversing circuit is arranged between the switch circuit and the power transmission interface, therefore, the current direction of the transmission interface transmission circuit is changed, the control ends of the reversing circuit and the switching circuit are connected with the controller, and the controller can directly control the actions of the reversing circuit and the switching circuit. The controller controls the action of the switch circuit and/or the reversing circuit according to the current state on the power transmission interface, the current state comprises the power-on state on the power transmission interface and/or the current direction of the current transmitted by the power transmission interface, the controller can control the power transmission state on the power transmission interface, particularly, the controller can control the current direction of the current transmitted by the power transmission interface, when the power transmission interface is connected between a plurality of indoor units needing power supply and the indoor units need power supply, whether the current exists on the power transmission interface is detected under the condition that the indoor units need power supply when power is off, if the current does not exist, the controller controls the switch circuit to act like the power transmission interface, if the current exists, the current transmitted by the power transmission interface is detected as the set current direction, if the current does not exist, the reversing circuit is controlled to continue reversing the current, the power supply circuit is arranged at a more flexible position, and can supply power to a plurality of indoor units, so that the overall wiring quantity of the air conditioner system is simplified, the difficulty of wiring and installation is reduced, and the flexibility of the overall power supply structure of the air conditioner system is improved.
It can be understood that, when the indoor unit is powered off, the power transmission interface supplies power to the indoor unit of the air conditioner needing power supply, wherein the power transmission interface can be arranged between at least two indoor units to realize power supply to a plurality of indoor units. And then realized setting up less power supply circuit and just can carrying out the power supply after the power failure to a plurality of indoor sets, corresponding wiring is few, and whole power supply topology interface is more nimble.
In any of the above technical solutions, the power transmission interface includes: the first power transmission interface is connected with a power supply; and the second power transmission interface is connected with the grounding end.
In the technical scheme, the power transmission interface comprises a first power transmission interface and a second power transmission interface, the first power transmission interface is connected with the power supply through a lead, the second power transmission interface is connected with the grounding end through a lead to form a current loop of the first power transmission interface, the power supply, the grounding end and the second power transmission interface, and the power supply provides current to flow to the grounding end after passing through the power transmission interface.
It can be understood that the power transmission interface can be connected with a communication bus of the air conditioner, so that a mode of combining communication and power supply is realized, all indoor units in the whole air conditioner system can get power through the communication bus, and a power line for power supply and power failure does not need to be additionally arranged.
In any of the above technical solutions, the power supply circuit further includes: the detection circuit is arranged between the power transmission interface and the switch circuit and is used for sending a current state signal to the controller; the controller is further used for receiving and analyzing the current state signal, and determining the power-on state of the power transmission interface and/or the current direction of the power transmission interface for transmitting current.
In the technical scheme, the power supply circuit further comprises a detection circuit, the detection circuit is arranged between the power transmission interface and the switch circuit and is used for detecting the power-on state at the power transmission interface and the current direction of the transmission current of the power transmission interface and sending the detected current state signal comprising the power-on state at the power transmission interface and the current direction of the transmission current of the power transmission interface to the controller. The controller receives the current state signal sent by the detection circuit, analyzes the current state signal and determines the power-on state of the power transmission interface and/or the current direction of the transmission current of the power transmission interface.
In any of the above solutions, the detection circuit is located between the switching circuit and the commutation circuit.
In the technical scheme, the power supply circuit is arranged in the air conditioner system, current can flow into a loop of the power transmission interface through the power transmission interface, and the detection circuit is arranged between the switching circuit and the reversing circuit, so that the current direction of the current transmitted by the power transmission circuit before and after the reversing circuit acts can be detected through the detection circuit before and after the reversing circuit acts, and whether the reversing circuit has a fault or not can be determined.
It can be understood that the switch circuit, the commutation circuit, the detection circuit and the power transmission interface are connected in series, and the detection circuit can also be arranged at other positions of the power transmission interface loop, and can also realize the detection of the current direction of the current transmitted by the power transmission interface.
In any of the above technical solutions, the detection circuit includes: the first input end of the first optical coupler is connected with the first power transmission interface, the first output end of the first optical coupler is connected with the second power transmission interface, the second input end of the first optical coupler is grounded, the second output end of the first optical coupler is connected with the controller, and the first optical coupler is used for sending a first current state signal to the controller; a first input end of the second optical coupler is connected with the second power transmission interface, a first output end of the second optical coupler is connected with the first power transmission interface, a second input end of the second optical coupler is grounded, a second output end of the second optical coupler is connected with the controller, and the second optical coupler is used for sending a second current state signal to the controller; the controller is further used for determining that the power transmission interface is in a power-on state according to the fact that the first current state signal or the second current state signal is received, determining that the power transmission interface is in a power-off state according to the fact that the first current state signal and the second current state signal are not received, and/or determining that the current direction of the power transmission interface transmitting current is in a set direction according to the fact that the first current state signal or the second current state signal is the same as the set signal, and determining that the current direction of the power transmission interface transmitting current is not in the set direction according to the fact that the first current state signal or the second current state signal is different from the set signal.
In this technical scheme, detection circuitry includes first opto-coupler and second opto-coupler, the first input end of first opto-coupler links to each other with first transmission of electricity interface, the first output end of first opto-coupler links to each other with second transmission of electricity interface, the second input end ground connection of first opto-coupler, the second output end of first opto-coupler links to each other with the controller, the electric current is from first transmission of electricity interface flow direction second transmission of electricity interface promptly, the first input end to the first output of first opto-coupler switches on, first opto-coupler can send first current state signal to the controller. The first input end of the second optical coupler is connected with the second power transmission interface, the first output end of the second optical coupler is connected with the first power transmission interface, the second input end of the second optical coupler is grounded, the second output end of the second optical coupler is connected with the controller, namely, current flows to the first power transmission interface from the second power transmission interface, the first input end of the second optical coupler is conducted to the first output end, and the second optical coupler can send a first current state signal to the controller. The current conduction directions of diodes in the first optical coupler and the second optical coupler are set to be opposite, then any one of the first optical coupler or the second optical coupler sends a first current state signal or a second current state signal to the controller, the power transmission interface can be determined to be in a power-on state, and the controller receives the first current state signal or the second current state signal to determine the current direction of the current transmission interface for transmitting current.
When the controller receives the first current state signal or the second current state signal, determining that the power transmission interface is in a power-on state; and when the controller does not receive the first current state signal and the second current state signal, determining that the power transmission interface is in a power-off state. When the power transmission interface is in a power-on state, the controller determines that the received first current state signal or the received second current state signal is a set current state signal, and determines that the current direction of the power transmission interface for transmitting current is a set direction; and the controller determines that the received first current state signal or the second current state signal is not the set current state signal, and determines that the current direction of the transmission current of the power transmission interface is opposite to the set direction.
In any of the above technical solutions, the switching circuit includes: a first switching device disposed between the first power transmission interface and the power supply source; a second switching device disposed between the second power transmission interface and the ground terminal; the controller is used for controlling the actions of the first switching device and the second switching device by delaying the set time when the power transmission interface is in a power-off state.
In the technical scheme, the switch circuit comprises a first switch device and a second switch device, the first switch device is arranged between the first power transmission interface and the power supply, the second switch device is arranged between the second power transmission interface and the grounding end, and the on-off state of the power transmission interface loop can be controlled by controlling the simultaneous action of the first switch device and the second switch device.
The controller is used for controlling the first switching device and the second switching device to act together after delaying the set time when detecting that the power transmission interface is in a power-off state, so that the power transmission interface is conducted with the power supply and the grounding end, and the power transmission interface is in a conducting state. The controller can set the time to be 1 millisecond through the switch circuit pair according to the detected power transmission interface electrifying state.
In any of the above technical solutions, the switching circuit further includes: the first end of the first relay is connected with the control ends of the first switching device and the second switching device; and the collector electrode of the first triode is connected with the second end of the first relay, the emitter electrode of the first triode is grounded, and the base electrode of the first triode is connected with the controller.
In the technical scheme, a base electrode of a first triode is used as a signal receiving end and connected with a controller, a collector electrode of the first triode is used as a signal output end and connected with a second end of a first relay, and an emitting electrode of the first triode is grounded. The first end of the first relay is connected with the control ends of the first switching device and the second switching device to protect the first triode, the contact point capacity of the first relay is large, the first relay is started before the first switching device and the second switching device are controlled to act, and then the first switching device and the second switching device are controlled through the first relay.
In any of the above technical solutions, the commutation circuit includes: the first fixed end of the first reversing device is connected with the power supply, the second fixed end of the first reversing device is connected with the grounding end, and the movable end of the first reversing device is connected with the first power transmission interface; the first fixed end of the second reversing device is connected with the grounding end, the second fixed end of the second reversing device is connected with the power supply, and the movable end of the second reversing device is connected with the second power transmission interface; the controller is used for controlling the first reversing device and the second reversing device to act when the current direction of the power transmission interface for transmitting current is not in the set direction.
In the technical scheme, the reversing circuit comprises a first reversing device and a second reversing device, a first fixed end of the first reversing device is connected with a power supply, a second fixed end of the first reversing device is connected with a grounding end, a movable end of the first reversing device is connected with a first power transmission interface, the movable end of the first reversing device can be connected with the first fixed end and can also be connected with a second fixed end, and after the first reversing device receives a control signal, the movable end of the first reversing device acts to switch between the first fixed end and the second fixed end of the first reversing device. The first fixed end of the second reversing device is connected with the grounding end, the second fixed end of the second reversing device is connected with the power supply, the movable end of the second reversing device is connected with the second power transmission interface, the movable end of the second reversing device can be connected with the first fixed end and can also be connected with the second fixed end, and after the second reversing device receives the control signal, the movable end of the second reversing device acts to switch between the first fixed end and the second fixed end of the first reversing device. The first reversing device and the second reversing device act simultaneously, and the flow direction of current between the first power transmission interface and the second power transmission interface can be controlled.
The controller controls the first reversing device and the second reversing device when detecting that the current direction of the current transmitted by the power transmission interface is not in the set direction, the flow direction of the current between the first power transmission interface and the second power transmission interface is adjusted, the current direction of the current output by the power transmission interface is in the set direction, and the adjustment of the current output direction by the power transmission interface is achieved.
In any of the above technical solutions, the commutation circuit further includes: the first end of the second relay is connected with the control ends of the first reversing device and the second reversing device; and the collector of the first triode is connected with the second end of the second relay, the emitter of the second triode is grounded, and the base of the second triode is connected with the controller.
In the technical scheme, a base electrode of the second triode is used as a signal receiving end and connected with the controller, a collector electrode of the second triode is used as a signal output end and connected with a second end of the second relay, and an emitting electrode of the second triode is grounded. The first end of the second relay is connected with the control ends of the first reversing device and the second reversing device to protect the second triode, the contact point capacity of the second relay is large, the second relay is started before the first reversing device and the second reversing device are controlled to act, and then the first reversing device and the second reversing device are controlled through the second relay.
According to an aspect of the second aspect of the present invention, there is provided a control method for a power supply circuit, which is used for the power supply circuit in any one of the above aspects, and includes: determining a current state on the power transmission interface; controlling the action of the switching circuit and/or the reversing circuit according to the current state on the power transmission interface; the current state is a power-on state on the digital electrical interface and/or a current direction of current transmitted by the power transmission interface.
In the technical scheme, the controller can control the current direction of the current transmitted by the power transmission interface, when the power transmission interface is connected among a plurality of indoor units needing power supply and the indoor units need power supply when the power failure of the indoor units needs power supply, whether the current exists on the power transmission interface is detected, if the current does not exist, the switching circuit is controlled to act like the power transmission interface to supply power, if the current exists, the current transmitted by the power transmission interface is detected to be in the set current direction, if the current does not exist, the reversing circuit is controlled to continue reversing the current, the control on the switching current direction is realized according to the current state at the power transmission interface, the setting position of the power supply circuit is more flexible, the power supply circuit can supply power to the plurality of indoor units, the integral wiring number of the air conditioner system is simplified, the flexibility of the integral power supply structure of the air conditioner system is improved, and the current in the power supply, the stability of power supply of the power supply circuit is ensured.
The power supply circuit comprises a power transmission interface, a switch circuit, a reversing circuit and a controller, one end of the power transmission interface is connected with an indoor unit of the air conditioner to be powered, the other end of the power transmission interface is connected with a power supply and a grounding terminal through a lead, the power transmission interface forms a loop with the power supply and the grounding terminal through the lead, current flows to the grounding terminal from the power supply through the power transmission interface after flowing through the power transmission interface through the lead, the switch circuit is arranged on the lead and connected with the power transmission interface and used for controlling the power-on state of the power transmission interface, namely the switch circuit is in a closed state, the power transmission interface is in a power-on state, the switch circuit is in a power-off state, the power transmission interface is in a power-off state, the reversing circuit is arranged between the switch circuit and the power transmission interface, the action of the reversing circuit can control the, the control ends of the reversing circuit and the switching circuit are connected with a controller, and the controller can directly control the actions of the reversing circuit and the switching circuit. The controller controls the action of the switch circuit and/or the reversing circuit according to the current state on the power transmission interface, wherein the current state comprises the power-on state on the power transmission interface and/or the current direction of the current transmitted by the power transmission interface, and the controller can control the power transmission state on the power transmission interface. When the indoor units are powered off, the power transmission interface supplies power to the indoor units of the air conditioners needing power supply, wherein the power transmission interface can be arranged between at least two indoor units, and power supply to the indoor units is achieved. And then realized setting up less power supply circuit and just can carrying out the power supply after the power failure to a plurality of indoor sets, corresponding wiring is few, and whole power supply topology interface is more nimble.
In any of the above technical solutions, the step of determining the current state on the power transmission interface specifically includes: and receiving and analyzing the current state signal, and determining the electrifying state of the power transmission interface and/or the current direction of the current transmitted by the power transmission interface.
In the technical scheme, the detection circuit is used for detecting the power-on state at the power transmission interface and the current direction of the current transmitted by the power transmission interface, and sending the detected current state signal comprising the power-on state at the power transmission interface and the current direction of the current transmitted by the power transmission interface to the controller. The controller receives the current state signal sent by the detection circuit, analyzes the current state signal and determines the power-on state of the power transmission interface and/or the current direction of the transmission current of the power transmission interface.
In any of the above technical solutions, the step of determining the power-on state of the power transmission interface and/or the direction of the transmission current of the power transmission interface specifically includes: determining that the power transmission interface is in a power-on state according to the received first current state signal or the second current state signal; determining that the power transmission interface is in a power-off state according to the fact that the first current state signal and the second current state signal are not received; and/or determining that the current direction of the transmission current of the power transmission interface is in the set direction according to the condition that the first current state signal or the second current state signal is the same as the set signal; and determining that the current direction of the transmission current of the transmission interface is not in the set direction according to the difference between the first current state signal or the second current state signal and the set signal.
In the technical scheme, when the controller receives a first current state signal or a second current state signal, the power transmission interface is determined to be in a power-on state; and when the controller does not receive the first current state signal and the second current state signal, determining that the power transmission interface is in a power-off state. When the power transmission interface is in a power-on state, the controller determines that the received first current state signal or the received second current state signal is a set current state signal, and determines that the current direction of the power transmission interface for transmitting current is a set direction; the controller determines that the received first current state signal or the received second current state signal is not the set current state signal, and then determines that the current direction of the power transmission interface for transmitting the current is opposite to the set direction, so that the power-on state of the power transmission interface and the current direction of the power transmission interface for transmitting the current are determined according to the first current state signal or the second current state signal sent by the first optical coupler and the second optical coupler.
In any of the above technical solutions, the step of controlling the switching circuit and/or the commutation circuit to operate according to the current state on the power transmission interface specifically includes: the power transmission interface is in a power-off state, and the action of the first switching device and the action of the second switching device are controlled by delaying the set time; the current direction of the transmission interface for transmitting current is not in the set direction, and the first reversing device and the second reversing device are controlled to act.
In the technical scheme, the controller is used for controlling the first switching device and the second switching device to act together after delaying the set time when detecting that the power transmission interface is in a power-off state, so that the power transmission interface is conducted with the power supply and the grounding end, and the power transmission interface is in a conducting state. The controller can set the time to be 1 millisecond through the switch circuit pair according to the detected power transmission interface electrifying state. When the power transmission interface is detected to be in the power-on state, the current direction of the current transmitted by the power transmission interface is detected not to be in the set direction, the first reversing device and the second reversing device are controlled, the flow direction of the current between the first power transmission interface and the second power transmission interface is adjusted, the current direction of the current output by the power transmission interface is enabled to be in the set direction, and the adjustment of the current output direction of the power transmission interface is achieved.
According to a third aspect of the present invention, there is provided an air conditioner comprising: a bus; the outdoor unit is connected with the bus; the indoor unit is connected with the bus; according to the power supply circuit in any technical scheme, the power supply circuit is arranged between the bus and the indoor unit.
In the technical scheme, the air conditioner comprises a bus, an indoor unit and an outdoor unit, the bus is a double bus for communication power supply, the outdoor unit and the indoor unit are both connected with the bus, a power supply circuit is arranged between the bus and the indoor unit, when the indoor unit is powered off, electricity can be taken from the bus through the power supply circuit, and the bus further realizes communication connection of the indoor unit and the outdoor unit. Through the mode of combining communication and power supply, all indoor units in the whole air conditioning system can get power from the bus without additionally arranging a power line required by power supply.
In any one of the above technical solutions, the air conditioner further includes: the first end of the inductive element is connected with the bus; and the first end of the rectifying circuit is connected with the second end of the inductive element, and the second end of the rectifying circuit is connected with a power transmission interface in the power supply circuit.
In the technical scheme, the air conditioner further comprises an inductive element and a rectifying circuit, wherein the first end of the inductive element is connected with the bus, the second end of the inductive element is connected with the first end of the rectifying circuit, and the second end of the rectifying circuit is connected with the power transmission interface of the power supply circuit. The rectifier circuit is used for continuously rectifying the current flowing out of or flowing into the first power transmission interface and the second power transmission interface, and the inductive element is used for continuously filtering the current flowing out of or flowing into the first power transmission interface and the second power transmission interface, so that the current flowing out of or into the power supply circuit meets the power supply requirement.
In any one of the above technical solutions, the air conditioner further includes: a capacitive element, a first end of the capacitive element being connected to the bus; and the communication circuit is connected with the capacitive element and is configured to be suitable for connecting the indoor unit with the outdoor unit in a communication mode.
In the technical scheme, the air conditioner further comprises a capacitive element and a communication circuit, wherein the first end of the capacitive element is connected with the bus, the second end of the capacitive element is connected with the communication circuit, and the capacitive element plays a role in filtering, so that signals transmitted by the communication circuit are smoother.
According to an aspect of the fourth aspect of the present invention, there is provided a computer-readable storage medium, on which a control program of a power supply circuit is stored, wherein when the control program of the power supply circuit is executed by a processor, the steps of the control method of the power supply circuit according to any one of the above aspects are implemented. Therefore, the control method of any power supply circuit provided in the above technical solution of the present invention has all the advantages, which are not described herein again.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a circuit diagram of a power supply circuit according to one embodiment of the invention;
FIG. 2 shows a circuit diagram of a power supply circuit according to another embodiment of the invention;
FIG. 3 shows a flow diagram of a control method of a power supply circuit according to an embodiment of the invention;
FIG. 4 shows a flow diagram of a control method of a power supply circuit according to another embodiment of the invention;
FIG. 5 illustrates an air conditioner topology according to an embodiment of the present invention;
fig. 6 illustrates a topology of an air conditioner according to another embodiment of the present invention;
FIG. 7 is a flow chart illustrating a method of controlling a power supply circuit according to an embodiment of the invention;
fig. 8 is a flow chart showing a control method of a power supply circuit according to another embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1, fig. 2, fig. 5 and fig. 6 is:
100 power supply circuit, 110 power transmission interface, 120 switching circuit, 122 first switching device, 124 second switching device, 126 first relay, 128 first triode, 130 reversing circuit, 132 first reversing device, 134 second reversing device, 136 second relay, 138 second triode, 140 detection circuit, 142 first optical coupler, 144 second optical coupler, 200 bus, 300 outdoor unit, 400 indoor unit, 500 communication circuit, 600 capacitive element, 700 inductive element and 800 rectifying circuit.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A power supply circuit, a control method, an air conditioner, and a computer-readable storage medium according to an embodiment of the present invention are described below with reference to fig. 1 to 8.
The first embodiment is as follows:
as shown in fig. 1, in one embodiment of the present invention, a power supply circuit 100 is provided, including: a power transmission interface 110; the switch circuit 120, the switch circuit 120 is connected to the power transmission interface 110, and the switch circuit 120 is used for controlling the power-on state of the power transmission interface 110; the commutation circuit 130, the commutation circuit 130 is disposed between the switch circuit 120 and the power transmission interface 110, and the commutation circuit 130 is configured to control a current transmission direction of the power transmission interface 110; a controller, connected to the control terminal of the switching circuit 120 and the control terminal of the commutation circuit 130, for determining a current state at the power transmission interface 110; controlling the switching circuit 120 and/or the commutation circuit 130 to act according to the current state on the power transmission interface 110; the current state is a power-on state of the power transmission interface 110 and/or a current direction of the power transmission interface 110.
In this embodiment, the power supply circuit 100 includes a power transmission interface 110, a switch circuit 120, a commutation circuit 130 and a controller, one end of the power transmission interface 110 is connected to an indoor unit of an air conditioner to be powered, the other end of the power transmission interface 110 is connected to a power supply and a ground terminal through a conductor, the power transmission interface 110 forms a loop with the power supply and the ground terminal through a conductor, current flows from the power supply to the ground terminal through the conductor through the power transmission interface 110, the switch circuit 120 is disposed on the conductor and connected to the power transmission interface 110 for controlling the power-on state of the power transmission interface 110, that is, the switch circuit 120 is in a closed state, the power transmission interface 110 is in a power-on state, the switch circuit 120 is in an open state, the power transmission interface 110 is in a power-off state, the commutation circuit 130 is further disposed on the conductor, the commutation circuit 130 is disposed between the switch circuit 120 and the power transmission interface 110, the, therefore, the current direction of the transmission circuit of the power transmission interface is changed, the control ends of the reversing circuit 130 and the switching circuit 120 are connected with the controller, and the controller can directly control the actions of the reversing circuit 130 and the switching circuit 120.
It can be understood that, when the indoor unit is powered off, the power transmission interface 110 supplies power to the indoor unit of the air conditioner requiring power supply, where the power transmission interface 110 may be disposed between at least two indoor units to supply power to a plurality of indoor units. And then realized setting up less power supply circuit 100 and just can carrying out the power supply after the power failure to a plurality of indoor sets, corresponding wiring is few, and whole power supply topology interface is more nimble.
The controller controls the action of the switch circuit 120 and/or the commutation circuit 130 according to the current state on the power transmission interface 110, the current state includes the power-on state on the power transmission interface 110 and/or the current direction of the current transmitted by the power transmission interface 110, so that the controller can control the power transmission state on the power transmission interface 110, specifically, the controller can control the current direction of the current transmitted by the power transmission interface 110, when the power transmission interface 110 is connected between a plurality of indoor units needing power supply and the indoor units need power supply when power is off, detect whether the current exists on the power transmission interface 110, if the current does not exist, control the switch circuit 120 to act like the power transmission interface 110 to supply power, if the current exists, detect whether the current transmitted by the power transmission interface 110 is the set current direction, if not, control the commutation circuit 130 to continue to commutate the current, the power supply circuit 100 can freely switch the current direction, the power supply circuit 100 is arranged at a flexible position, and the power supply circuit 100 can supply power to a plurality of indoor units, so that the overall wiring quantity of the air conditioner system is simplified, the difficulty of wiring and installation is reduced, and the flexibility of the overall power supply structure of the air conditioner system is improved.
Example two:
in another embodiment of the present invention, as shown in fig. 1, there is provided a power supply circuit 100, including: power transmission interface 110, switching circuit 120, commutation circuit 130, detection circuit 140 and a controller. The power transmission interface 110 includes: a first power transmission interface 110, the first power transmission interface 110 being connected to a power supply; a second power transmission interface 110, the second power transmission interface 110 being connected to the ground; the detection circuit 140 is arranged between the power transmission interface 110 and the switching circuit 120.
The detection circuit 140 is configured to send a current status signal to the controller, and the controller is further configured to receive and analyze the current status signal, and determine a power-on state of the power transmission interface 110 and/or a current direction in which the power transmission interface 110 transmits current.
In this embodiment, the power transmission interface 110 includes a first power transmission interface 110 and a second power transmission interface 110, the first power transmission interface 110 is connected to a power supply through a wire, the second power transmission interface 110 is connected to a ground through a wire, a current loop of the first power transmission interface 110, the power supply, the ground and the second power transmission interface 110 is formed, and the power supply provides current to flow to the ground through the power transmission interface 110. The power supply circuit 100 further comprises a detection circuit 140, the detection circuit 140 is disposed between the power transmission interface 110 and the switch circuit 120, and the detection circuit 140 is configured to detect an energization state at the power transmission interface 110 and a current direction in which the power transmission interface 110 transmits a current, and transmit a detected current state signal including the energization state at the power transmission interface 110 and the current direction in which the power transmission interface 110 transmits the current to the controller. The controller receives the current state signal sent by the detection circuit 140, and analyzes the current state signal to determine the power-on state of the power transmission interface 110 and/or the current direction of the power transmission interface 110.
It can be understood that the power transmission interface 110 may be connected to a communication bus of the air conditioner, so as to implement a combination of communication and power supply, so that all indoor units in the whole air conditioner system can obtain power through the communication bus without additionally providing a power line for power supply and power failure.
In one particular embodiment, as shown in fig. 2, detection circuit 140 is located between switching circuit 120 and commutation circuit 130.
In this embodiment, the power supply circuit 100 is provided in the air conditioner system, and current can flow into the loop of the power transmission interface 110 through the power transmission interface 110, and by providing the detection circuit 140 between the switch circuit 120 and the commutation circuit 130, it is achieved that before and after the action of the commutation circuit 130, the current direction of the power transmission circuit transmitting current before and after the action of the commutation circuit 130 can be detected by the detection circuit 140, and whether or not there is a fault in the commutation circuit 130 can be determined.
In another specific embodiment, shown in fig. 1, the commutation circuit 130 is located between the detection circuit 140 and the switching circuit 120.
It is understood that the switch circuit 120, the commutation circuit 130, the detection circuit 140 and the power transmission interface 110 are connected in series, and the detection circuit 140 may be disposed at other positions of the loop of the power transmission interface 110, and may also detect the current direction of the current transmitted by the power transmission interface 110.
In any of the above embodiments, the detection circuit 140 includes: a first input end of the first optical coupler 142 is connected with the first power transmission interface 110, a first output end of the first optical coupler 142 is connected with the second power transmission interface 110, a second input end of the first optical coupler 142 is grounded, a second output end of the first optical coupler 142 is connected with a controller, and the first optical coupler 142 is used for sending a first current state signal to the controller; a first input end of the second optical coupler 144 is connected with the second power transmission interface 110, a first output end of the second optical coupler 144 is connected with the first power transmission interface 110, a second input end of the second optical coupler 144 is grounded, a second output end of the second optical coupler 144 is connected with the controller, and the second optical coupler 144 is used for sending a second current state signal to the controller;
the controller is further configured to determine that the power transmission interface 110 is in a power-on state according to the received first current state signal or the second current state signal, determine that the power transmission interface 110 is in a power-off state according to the first current state signal and the second current state signal that are not received, and/or determine that the current direction of the power transmission interface 110 transmitting the current is in the set direction according to the first current state signal or the second current state signal that are the same as the set signal, and determine that the current direction of the power transmission interface 110 transmitting the current is not in the set direction according to the first current state signal or the second current state signal that are different from the set signal.
In this embodiment, the detection circuit 140 includes a first optical coupler 142 and a second optical coupler 144, a first input end of the first optical coupler 142 is connected to the first power transmission interface 110, a first output end of the first optical coupler 142 is connected to the second power transmission interface 110, a second input end of the first optical coupler 142 is grounded, a second output end of the first optical coupler 142 is connected to the controller, that is, a current flows from the first power transmission interface 110 to the second power transmission interface 110, the first input end of the first optical coupler 142 is turned on to the first output end, and the first optical coupler 142 can send a first current status signal to the controller. The first input end of the second optical coupler 144 is connected with the second power transmission interface 110, the first output end of the second optical coupler 144 is connected with the first power transmission interface 110, the second input end of the second optical coupler 144 is grounded, the second output end of the second optical coupler 144 is connected with the controller, namely, current flows from the second power transmission interface 110 to the first power transmission interface 110, the first input end of the second optical coupler 144 is conducted to the first output end, and the second optical coupler 144 can send a first current state signal to the controller. The current conduction directions of diodes in the first optocoupler 142 and the second optocoupler 144 are set to be opposite, then any one of the first optocoupler 142 or the second optocoupler 144 sends a first current state signal or a second current state signal to the controller, and the controller can determine that the power transmission interface 110 is in a power-on state, and then receives the first current state signal or the second current state signal, and determines the current direction of the current transmission interface for transmitting current.
When the controller receives the first current state signal or the second current state signal, it determines that the power transmission interface 110 is in a power-on state; when the controller does not receive the first current state signal and the second current state signal, it is determined that the power transmission interface 110 is in the power-off state. When the power transmission interface 110 is in the power-on state, the controller determines that the received first current state signal or the second current state signal is the set current state signal, and then determines that the current direction of the power transmission interface 110 for transmitting the current is the set direction; if the controller determines that the received first current state signal or the second current state signal is not the set current state signal, it determines that the current direction of the power transmission interface 110 transmitting current is opposite to the set direction.
In any of the above embodiments, the switching circuit 120 includes: a first switching device 122, the first switching device 122 being arranged between the first power transmission interface 110 and the power supply source; a second switching device 124, the second switching device 124 being arranged between the second power transmission interface 110 and ground; the controller is configured to enable the power transmission interface 110 to be in a power-off state, and to control the first switching device 122 and the second switching device 124 to operate with a delay setting time.
In this embodiment, the switching circuit 120 includes a first switching device 122 and a second switching device 124, the first switching device 122 is disposed between the first power transmission interface 110 and the power supply, the second switching device 124 is disposed between the second power transmission interface 110 and the ground, and controlling the first switching device 122 and the second switching device 124 to operate simultaneously can control the on/off state of the loop of the power transmission interface 110.
The controller is configured to, when detecting that the power transmission interface 110 is in a power-off state, delay for a set time and then control the first switching device 122 and the second switching device 124 to operate together, so that the power transmission interface 110 is turned on with the power supply and the ground, and the power transmission interface 110 is in a conducting state. It is realized that the controller can set the time to be 1 millisecond by the pair of switching circuits 120 according to the detected energization state of the power transmission interface 110.
In any of the above embodiments, the switching circuit 120 further includes: a first relay 126, a first terminal of the first relay 126 being connected to control terminals of the first switching device 122 and the second switching device 124; and a first transistor 128, wherein a collector of the first transistor 128 is connected to the second terminal of the first relay 126, an emitter of the first transistor 128 is grounded, and a base of the first transistor 128 is connected to the controller.
In this embodiment, the base of the first transistor 128 is connected to the controller as a signal receiving terminal, the collector of the first transistor 128 is connected to the second terminal of the first relay 126 as a signal output terminal, and the emitter of the first transistor 128 is grounded. The first terminal of the first relay 126 is connected to the control terminals of the first switching device 122 and the second switching device 124, and plays a role of protecting the first transistor 128, the contact capacitance of the first relay 126 is large, the first relay 126 is started before the actions of the first switching device 122 and the second switching device 124 are controlled, and then the first switching device 122 and the second switching device 124 are controlled by the first relay 126.
In any of the above embodiments, the commutation circuit 130 comprises: a first commutation device 132, a first stationary terminal of the first commutation device 132 is connected to the power supply, a second stationary terminal of the first commutation device 132 is connected to the ground terminal, and a moving terminal of the first commutation device 132 is connected to the first power transmission interface 110; a second commutation device 134, a first fixed end of the second commutation device 134 is connected to the ground terminal, a second fixed end of the second commutation device 134 is connected to the power supply, and a moving end of the second commutation device 134 is connected to the second power transmission interface 110; the controller is used for controlling the first commutation device 132 and the second commutation device 134 to act when the current direction of the power transmission interface 110 for transmitting current is not in the set direction.
In this embodiment, the commutation circuit 130 includes a first commutation device 132 and a second commutation device 134, a first stationary terminal of the first commutation device 132 is connected to the power supply, a second stationary terminal of the first commutation device 132 is connected to the ground terminal, a moving terminal of the first commutation device 132 is connected to the first power transmission interface 110, a moving terminal of the first commutation device 132 may be connected to the first stationary terminal or the second stationary terminal, and after the first commutation device 132 receives the control signal, a movement of the moving terminal of the first commutation device 132 is switched between the first stationary terminal and the second stationary terminal of the first commutation device 132. A first fixed end of the second commutation device 134 is connected to the ground terminal, a second fixed end of the second commutation device 134 is connected to the power supply, a moving end of the second commutation device 134 is connected to the second power transmission interface 110, a moving end of the second commutation device 134 may be connected to the first fixed end or the second fixed end, and after the second commutation device 134 receives the control signal, a moving end of the second commutation device 134 switches between the first fixed end and the second fixed end of the first commutation device 132. The first commutation device 132 and the second commutation device 134 act simultaneously, enabling control of the flow of current between the first power transmission interface 110 and the second power transmission interface 110.
When detecting that the current direction of the current transmitted by the power transmission interface 110 is not in the set direction, the controller controls the first commutation device 132 and the second commutation device 134 to adjust the current direction from the first power transmission interface 110 to the second power transmission interface 110, so that the current direction of the current output by the power transmission interface 110 is in the set direction, and the adjustment of the current output direction of the power transmission interface 110 is realized.
In any of the above embodiments, the commutation circuit 130 further comprises: a second relay 136, a first terminal of the second relay 136 being connected to control terminals of the first commutation device 132 and the second commutation device 134; and a second transistor 138, wherein the collector of the first transistor 128 is connected to the second terminal of the second relay 136, the emitter of the second transistor 138 is grounded, and the base of the second transistor 138 is connected to the controller.
In this embodiment, the base of the second transistor 138 is connected to the controller as a signal receiving terminal, the collector of the second transistor 138 is connected to the second terminal of the second relay 136 as a signal output terminal, and the emitter of the second transistor 138 is grounded. The first end of the second relay 136 is connected to the control ends of the first commutation device 132 and the second commutation device 134, so as to protect the second triode 138, the contact point of the second relay 136 has a large capacity, the second relay 136 is started before the first commutation device 132 and the second commutation device 134 are controlled to act, and then the first commutation device 132 and the second commutation device 134 are controlled by the second relay 136.
According to an aspect of the second aspect of the present invention, there is provided a control method of a power supply circuit 100, for the power supply circuit 100 according to any of the above aspects, including: determining a current state on power transmission interface 110; controlling the switching circuit 120 and/or the commutation circuit 130 to act according to the current state on the power transmission interface 110; wherein the current state is a power-on state on the digital interface and/or a current direction in which the power transmission interface 110 transmits current.
Example three:
as shown in fig. 3, in an embodiment of the present invention, there is provided a control method of a power supply circuit, for the power supply circuit in any one of the above embodiments, including:
step S102, determining the current state on the power transmission interface;
and step S104, controlling the switch circuit and/or the reversing circuit to act according to the current state on the power transmission interface.
The current state is a power-on state on the digital electrical interface and/or a current direction of current transmitted by the power transmission interface.
In the embodiment, the controller can control the current direction of the current transmitted by the power transmission interface, when the power transmission interface is connected among a plurality of indoor units needing power supply and the indoor units need power supply when the power failure of the indoor units needs power supply, the controller detects whether the current exists on the power transmission interface, controls the switch circuit to act like the power transmission interface to supply power if the current does not exist, detects whether the current transmitted by the power transmission interface is in the set current direction if the current exists, controls the reversing circuit to continue reversing the current if the current does not exist, realizes the control on the switching current direction according to the current state at the power transmission interface, enables the setting position of the power supply circuit to be more flexible, and the power supply circuit can supply power to the plurality of indoor units, simplifies the integral wiring number of the air conditioner system, improves the flexibility of the integral power supply structure of the air conditioner system, and can control the current in the power supply circuit according, the stability of power supply of the power supply circuit is ensured.
It can be understood that the power supply circuit comprises a power transmission interface, a switch circuit, a reversing circuit and a controller, one end of the power transmission interface is connected with an indoor unit of the air conditioner to be powered, the other end of the power transmission interface is connected with a power supply and a grounding end through a lead, the power transmission interface forms a loop with the power supply and the grounding end through leads, current flows to the grounding end from the power supply through the power transmission interface through the leads, the switch circuit is arranged on the leads and connected with the power transmission interface and used for controlling the power-on state of the power transmission interface, namely the switch circuit is in a closed state, the power transmission interface is in a power-on state, the switch circuit is in a disconnected state, the power transmission interface is in a power-off state, the reversing circuit is also arranged on the leads and arranged between the switch circuit and the power transmission interface, the action of the reversing circuit can control the flow direction of the, the control ends of the reversing circuit and the switching circuit are connected with a controller, and the controller can directly control the actions of the reversing circuit and the switching circuit. The controller controls the action of the switch circuit and/or the reversing circuit according to the current state on the power transmission interface, wherein the current state comprises the power-on state on the power transmission interface and/or the current direction of the current transmitted by the power transmission interface, and the controller can control the power transmission state on the power transmission interface. When the indoor units are powered off, the power transmission interface supplies power to the indoor units of the air conditioners needing power supply, wherein the power transmission interface can be arranged between at least two indoor units, and power supply to the indoor units is achieved. And then realized setting up less power supply circuit and just can carrying out the power supply after the power failure to a plurality of indoor sets, corresponding wiring is few, and whole power supply topology interface is more nimble.
In any of the above embodiments, the step of determining the current state on the power transmission interface specifically includes: and receiving and analyzing the current state signal, and determining the electrifying state of the power transmission interface and/or the current direction of the current transmitted by the power transmission interface.
In this embodiment, the detection circuit is configured to detect an energization state at the power transmission interface and a current direction in which the power transmission interface transmits a current, and send a detected current state signal including the energization state at the power transmission interface and the current direction in which the power transmission interface transmits the current to the controller. The controller receives the current state signal sent by the detection circuit, analyzes the current state signal and determines the power-on state of the power transmission interface and/or the current direction of the transmission current of the power transmission interface.
In any of the above embodiments, the step of determining the power-on state of the power transmission interface and/or the direction of the current transmitted by the power transmission interface specifically includes: determining that the power transmission interface is in a power-on state according to the received first current state signal or the second current state signal; determining that the power transmission interface is in a power-off state according to the fact that the first current state signal and the second current state signal are not received; and/or determining that the current direction of the transmission current of the power transmission interface is in the set direction according to the condition that the first current state signal or the second current state signal is the same as the set signal; and determining that the current direction of the transmission current of the transmission interface is not in the set direction according to the difference between the first current state signal or the second current state signal and the set signal.
In this embodiment, when the controller receives the first current status signal or the second current status signal, it determines that the power transmission interface is in the power-on state; and when the controller does not receive the first current state signal and the second current state signal, determining that the power transmission interface is in a power-off state. When the power transmission interface is in a power-on state, the controller determines that the received first current state signal or the received second current state signal is a set current state signal, and determines that the current direction of the power transmission interface for transmitting current is a set direction; the controller determines that the received first current state signal or the received second current state signal is not the set current state signal, and then determines that the current direction of the power transmission interface for transmitting the current is opposite to the set direction, so that the power-on state of the power transmission interface and the current direction of the power transmission interface for transmitting the current are determined according to the first current state signal or the second current state signal sent by the first optical coupler and the second optical coupler. The current state at the power transmission interface can be accurately detected by utilizing the first optocoupler and the second optocoupler, and the detection accuracy can be improved while the circuit wiring is simplified.
It can be understood that the first optical coupler emits a first current state signal, and the second optical coupler emits a second current state signal, specifically as follows:
the first input end of the first optical coupler is connected with the first power transmission interface, the first output end of the first optical coupler is connected with the second power transmission interface, the second input end of the first optical coupler is grounded, the second output end of the first optical coupler is connected with the controller, namely, current flows from the first power transmission interface to the second power transmission interface, the first input end of the first optical coupler is conducted to the first output end, and the first optical coupler can send a first current state signal to the controller.
The first input end of the second optical coupler is connected with the second power transmission interface, the first output end of the second optical coupler is connected with the first power transmission interface, the second input end of the second optical coupler is grounded, the second output end of the second optical coupler is connected with the controller, namely, current flows to the first power transmission interface from the second power transmission interface, the first input end of the second optical coupler is conducted to the first output end, and the second optical coupler can send a first current state signal to the controller.
In any of the above embodiments, the detection circuit is disposed between the switching circuit and the commutation circuit, and the received first current state signal or the second current state signal is determined to be the setting signal when the power transmission interface is in the power-on state and the switching circuit is in the off state; and controlling the reversing circuit to act, and judging whether the received first current state signal or the second current state signal is a setting signal.
In this embodiment, since the detection circuit is disposed between the switching circuit and the commutation circuit, the power transmission interface is in the power-on state and the switching circuit is in the power-off state, and it can be determined that the current of the power transmission interface flows through the commutation circuit first and then through the detection circuit. The method comprises the steps of obtaining a first current state signal or a second current state signal sent by a detection circuit before controlling the reversing circuit to act, obtaining the first current state signal or the second current state signal sent by the detection circuit before controlling the reversing circuit to act, and determining whether the reversing circuit is in fault or not according to whether the two obtained first current state signals or the two obtained second current state signals are the same signal. And when the same signal is determined to be acquired twice, determining that the reversing circuit is in fault, and if the different signals are determined to be acquired twice, determining that the reversing circuit is not in fault. By arranging the detection circuit between the switching circuit and the commutation circuit, and by the above method, it is possible to detect whether or not the commutation circuit has a fault.
Example four:
as shown in fig. 4, in an embodiment of the present invention, there is provided a control method of a power supply circuit, for a power supply circuit in any one of the above embodiments, including:
step S202, determining the current state on the power transmission interface;
step S204, controlling the actions of the first switching device and the second switching device by delaying the set time according to the power-off state of the power transmission interface;
and step S206, determining that the current direction of the current transmitted by the power transmission interface is not in the set direction, and controlling the first reversing device and the second reversing device to act.
In this embodiment, the controller is configured to control the first switching device and the second switching device to operate together after delaying a set time when the power transmission interface is detected to be in a power-off state, so that the power transmission interface is turned on with the power supply and the ground terminal, and the power transmission interface is in a conducting state. The controller can set the time to be 1 millisecond through the switch circuit pair according to the detected power transmission interface electrifying state. When the power transmission interface is detected to be in the power-on state, the current direction of the current transmitted by the power transmission interface is detected not to be in the set direction, the first reversing device and the second reversing device are controlled, the flow direction of the current between the first power transmission interface and the second power transmission interface is adjusted, the current direction of the current output by the power transmission interface is enabled to be in the set direction, and the adjustment of the current output direction of the power transmission interface is achieved. The current state at the power transmission interface is detected, and the current in the power supply circuit is controlled according to the actual current state at the power transmission interface obtained through detection, so that the power supply stability of the power supply circuit is ensured
Wherein the power transmission interface is controlled in the power transmission state by controlling the first switching device and the second switching device to operate simultaneously. And controlling and switching the current direction of the current of the power transmission interface by controlling the first reversing device and the second reversing device to act simultaneously. The method comprises the following specific steps:
a first switching device disposed between the first power transmission interface and the power supply source; a second switching device disposed between the second power transmission interface and ground.
The first fixed end of the first reversing device is connected with the power supply, the second fixed end of the first reversing device is connected with the grounding end, and the movable end of the first reversing device is connected with the first power transmission interface; and a first fixed end of the second reversing device is connected with the grounding end, a second fixed end of the second reversing device is connected with the power supply, and a movable end of the second reversing device is connected with the second power transmission interface.
Example five:
as shown in fig. 5, in one embodiment of the present invention, there is provided an air conditioner including: a bus 200; an outdoor unit 300, the outdoor unit 300 being connected to the bus 200; an indoor unit 400, the indoor unit 400 being connected to the bus 200; as in any of the above embodiments, the power supply circuit is disposed between the bus 200 and the indoor unit 400.
In this embodiment, the air conditioner includes a bus 200, an indoor unit 400, and an outdoor unit 300, the bus 200 is a dual bus 200 for communication and power supply, both the outdoor unit 300 and the indoor unit 400 are connected to the bus 200, a power supply circuit is disposed between the bus 200 and the indoor unit 400, when the indoor unit 400 is powered off, power can be taken from the bus 200 through the power supply circuit, and the bus 200 also realizes communication connection between the indoor unit 400 and the outdoor unit 300. Through the mode of combining communication and power supply, all indoor units 400 in the whole air conditioning system can get power from the bus 200 without additionally arranging power lines required by power supply.
As shown in fig. 6, in any of the above embodiments, the air conditioner further includes: an inductive element 700, a first end of the inductive element 700 being connected to the bus 200; and a first end of the rectifying circuit 800 is connected with a second end of the inductive element 700, and a second end of the rectifying circuit 800 is connected with a power transmission interface in the power supply circuit.
In this embodiment, the air conditioner further includes an inductive element 700 and a rectifying circuit 800, wherein a first end of the inductive element 700 is connected to the bus 200, a second end of the inductive element 700 is connected to a first end of the rectifying circuit 800, and a second end of the rectifying circuit 800 is connected to a power transmission interface of the power supply circuit. The rectifier circuit 800 is configured to continuously rectify currents flowing from or into the first power transmission interface and the second power transmission interface, and the inductive element 700 is configured to continuously filter currents flowing from or into the first power transmission interface and the second power transmission interface, so that the currents flowing from or into the power supply circuit both meet the power supply requirement.
In any of the above embodiments, the air conditioner further comprises: a capacitive element 600, a first end of the capacitive element 600 being connected to the bus 200; and a communication circuit 500, wherein the communication circuit 500 is connected with the capacitive element 600, and the communication circuit 500 is configured to be suitable for the indoor unit 400 to be in communication connection with the outdoor unit 300.
In this embodiment, the air conditioner further includes a capacitive element 600 and a communication circuit 500, a first end of the capacitive element 600 is connected to the bus 200, a second end of the capacitive element 600 is connected to the communication circuit 500, and the capacitive element 600 performs a filtering function to smooth signals transmitted by the communication circuit 500.
Example six:
as shown in fig. 5, in a complete embodiment of the present invention, there is provided an air conditioner power supply system, including: bus 200, indoor set power cord, outdoor unit power cord and supply circuit.
The bus 200 refers to a power line that can take electricity when the indoor unit 400 does not take electricity from the indoor unit power line, and when the indoor unit 400 is powered down, the line must have electricity and is not necessarily different from the indoor unit power line and the outdoor unit power line by one line current state signal;
the indoor unit power line refers to a power line for supplying power to the indoor unit 400, the indoor unit 400 gets power from the power line when the indoor unit 400 normally works, when the power switch of the indoor unit 400 is positioned behind the electric current state signal power line (near the end of the indoor unit 400), the indoor unit 400 power can be the same line as the bus 200 and the outdoor unit power line, when the power switch of the indoor unit 400 is positioned at the power line (far from the end of the indoor unit 400), namely when the switch is disconnected, the indoor unit 400 on the line is in a power-down state, the indoor unit power does not be the same line as the bus 200 and; current state signal
The outdoor unit power line refers to a power line for supplying power to the outdoor unit 300, and when the indoor unit 400 is powered off, power must be supplied to the line;
the power supply circuit refers to a circuit module or a device which gets power from the bus 200 and realizes the coupling of a power supply and the communication lines of the indoor and outdoor units, the position and the number of the device are determined according to the actual multi-split system and can be far less than the number of the indoor units 400, the communication lines of the indoor and outdoor units connected by the device can be double lines, the positive and negative directions of the power supply on the double lines can not be distinguished when the coupling voltage is alternating current voltage, and the circuit module for realizing the positive and negative directions and the switching of the power supply is needed when the coupling voltage is direct current voltage.
As shown in fig. 7, an embodiment of the present invention provides a method for controlling a power supply circuit, which is used for the power supply circuit shown in fig. 1, and specifically includes:
step S302, initializing a power supply circuit;
step S304, judging whether the power transmission interface is in a power-on state, if so, executing step S308, and if not, executing step S306;
step S306, controlling the action of a switch circuit;
step S308, judging whether the current direction is positive, if so, executing step S312, otherwise, executing step S310;
step S310, controlling the action of a reversing circuit;
in step S312, the switching circuit and the commutation circuit are controlled to remain stationary.
In the embodiment, whether the power transmission interface is in a power-on state and whether the current direction of the power transmission interface for transmitting current is a preset direction are detected through the detection circuit, and the current state of the power transmission interface is controlled by controlling the switching circuit and the reversing circuit to act.
As shown in fig. 8, another embodiment of the present invention provides a method for controlling a power supply circuit, which is used for the power supply circuit shown in fig. 2, and specifically includes:
step S402, initializing a power supply circuit;
step S404, judging whether the power transmission interface is in a power-on state, if so, executing step S408, and if not, executing step S406;
step S406, controlling the switch circuit to operate;
step S408, determining whether the current direction is positive, if so, executing step S412, otherwise, executing step S410;
step S410, controlling the action of a reversing circuit;
step S412, determining whether the current direction is reverse, if yes, executing step S408, otherwise executing step S414;
in step S414, the switching circuit and the commutation circuit are controlled to remain stationary.
In this embodiment, after controlling the commutation circuit to operate, it is detected whether the current flow direction changes to the positive direction again, if not, the step S408 is returned to judge again, and the commutation circuit is controlled to operate again according to the judgment result, so that the effectiveness of the operation is ensured, and commutation failure caused by the malfunction of the commutation circuit is avoided.
Example seven:
in an embodiment of the present invention, a computer-readable storage medium is provided, on which a control program of a power supply circuit is stored, and when the control program of the power supply circuit is executed by a processor, the steps of the control method of the power supply circuit in the first embodiment are implemented. Therefore, all the advantages of the fault detection method proposed in any embodiment of the present invention are achieved, and are not described herein again.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "another embodiment," "a specific embodiment," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (17)

1. A power supply circuit, comprising:
a power transmission interface;
the switch circuit is connected with the power transmission interface and is used for controlling the power-on state of the power transmission interface;
the reversing circuit is arranged between the switching circuit and the power transmission interface and is used for controlling the current transmission direction of the power transmission interface;
the controller is connected with the control end of the switching circuit and the control end of the reversing circuit and used for determining the current state on the power transmission interface; controlling the switching circuit and/or the reversing circuit to act according to the current state on the power transmission interface; the current state is a power-on state on a power transmission interface and/or a current direction of current transmitted by the power transmission interface.
2. The power supply circuit of claim 1, wherein the power transmission interface comprises:
the first power transmission interface is connected with a power supply;
and the second power transmission interface is connected with the grounding end.
3. The power supply circuit of claim 2, further comprising:
a detection circuit disposed between the power transmission interface and the switching circuit, the detection circuit configured to send a current status signal to the controller;
the controller is further configured to receive and analyze the current state signal, and determine an energization state of the power transmission interface and/or a current direction of a current transmitted by the power transmission interface.
4. The power supply circuit of claim 3,
the detection circuit is located between the switching circuit and the commutation circuit.
5. The power supply circuit of claim 4, wherein the detection circuit comprises:
a first input end of the first optical coupler is connected with a first power transmission interface, a first output end of the first optical coupler is connected with a second power transmission interface, a second input end of the first optical coupler is grounded, a second output end of the first optical coupler is connected with the controller, and the first optical coupler is used for sending a first current state signal to the controller;
a first input end of the second optical coupler is connected with the second power transmission interface, a first output end of the second optical coupler is connected with the first power transmission interface, a second input end of the second optical coupler is grounded, a second output end of the second optical coupler is connected with the controller, and the second optical coupler is used for sending a second current state signal to the controller;
the controller is further configured to determine that the power transmission interface is in a power-on state according to receiving the first current state signal or the second current state signal, determine that the power transmission interface is in a power-off state according to not receiving the first current state signal and the second current state signal, and/or determine that a current direction of current transmission by the power transmission interface is in a set direction according to that the first current state signal or the second current state signal is the same as a set signal, and determine that the current direction of current transmission by the power transmission interface is not in the set direction according to that the first current state signal or the second current state signal is different from the set signal.
6. The power supply circuit according to any one of claims 2 to 5, wherein the switching circuit includes:
a first switching device disposed between the first power transmission interface and the power supply source;
a second switching device disposed between the second power transmission interface and a ground terminal;
the controller is used for controlling the first switch device and the second switch device to act by delaying the set time when the power transmission interface is in a power-off state.
7. The power supply circuit of claim 6, wherein the switching circuit further comprises:
a first relay, a first end of which is connected with control ends of the first switching device and the second switching device;
and the collector electrode of the first triode is connected with the second end of the first relay, the emitter electrode of the first triode is grounded, and the base electrode of the first triode is connected with the controller.
8. The power supply circuit of claim 7, wherein the commutation circuit comprises:
a first stationary end of the first reversing device is connected with the power supply, a second stationary end of the first reversing device is connected with the grounding end, and a moving end of the first reversing device is connected with the first power transmission interface;
a first fixed end of the second reversing device is connected with the grounding end, a second fixed end of the second reversing device is connected with the power supply, and a movable end of the second reversing device is connected with the second power transmission interface;
the controller is used for controlling the first reversing device and the second reversing device to act when the current direction of the power transmission interface for transmitting current is not in a set direction.
9. The power supply circuit of claim 8, wherein the commutation circuit further comprises:
a first end of the second relay is connected with the control ends of the first reversing device and the second reversing device;
and the collector electrode of the first triode is connected with the second end of the second relay, the emitter electrode of the second triode is grounded, and the base electrode of the second triode is connected with the controller.
10. A control method of a power supply circuit for the power supply circuit according to any one of claims 1 to 9, characterized by comprising:
determining a current state on the power transmission interface;
controlling the switching circuit and/or the reversing circuit to act according to the current state on the power transmission interface;
the current state is a power-on state on the digital electrical interface and/or a current direction of current transmitted by the power transmission interface.
11. The method according to claim 10, wherein the step of determining the current state at the power transmission interface specifically comprises:
and receiving and analyzing the current state signal, and determining the power-on state of the power transmission interface and/or the current direction of the current transmitted by the power transmission interface.
12. The method according to claim 11, wherein the step of determining the power-on state of the power transmission interface and/or the direction of the transmission current of the power transmission interface specifically includes:
determining that the power transmission interface is in a power-on state according to the received first current state signal or the second current state signal;
determining that the power transmission interface is in a power-off state according to the first current state signal and the second current state signal not being received;
and/or determining that the current direction of the transmission current of the power transmission interface is in the set direction according to the condition that the first current state signal or the second current state signal is the same as the set signal;
and determining that the current direction of the transmission current of the transmission interface is not in the set direction according to the difference between the first current state signal or the second current state signal and the set signal.
13. The method according to claim 12, wherein the step of controlling the switching circuit and/or the commutation circuit to operate according to the current state at the power transmission interface specifically includes:
the power transmission interface is in a power-off state, and the action of the first switching device and the action of the second switching device are controlled by delaying the set time;
and the current direction of the transmission interface for transmitting current is not in the set direction, and the first reversing device and the second reversing device are controlled to act.
14. An air conditioner, comprising:
a bus;
the outdoor unit is connected with the bus;
the indoor unit is connected with the bus;
the power supply circuit according to any one of claims 1 to 9, which is provided between a bus line and an indoor unit.
15. The air conditioner according to claim 14, further comprising:
an inductive element, a first end of the inductive element being connected to the bus;
and the first end of the rectifying circuit is connected with the second end of the inductive element, and the second end of the rectifying circuit is connected with a power transmission interface in the power supply circuit.
16. The air conditioner according to claim 15, further comprising:
a capacitive element, a first end of the capacitive element being connected to the bus;
a communication circuit coupled to the capacitive element, the communication circuit configured to communicatively couple the indoor unit to the outdoor unit.
17. A computer-readable storage medium, characterized in that a control program of a power supply circuit is stored on the computer-readable storage medium, which when executed by a processor implements the steps of the control method of the power supply circuit according to any one of claims 10 to 13.
CN202010134050.4A 2020-03-02 2020-03-02 Power supply circuit, control method, air conditioner, and computer-readable storage medium Active CN111306745B (en)

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Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0510576A (en) * 1991-07-01 1993-01-19 Toshiba Corp Air conditioner
JPH066357A (en) * 1992-06-18 1994-01-14 Daikin Ind Ltd Transmitter
CN2163341Y (en) * 1993-08-07 1994-04-27 中国人民解放军89001部队 Energy saving device for air conditioner
KR100706206B1 (en) * 2005-10-24 2007-04-12 삼성전자주식회사 Device for preheating compressor and method thereof
EP1892483A2 (en) * 2006-08-25 2008-02-27 Sanyo Electric Co., Ltd. Air conditioner and method of controlling the same
CN101231014A (en) * 2007-01-25 2008-07-30 三星电子株式会社 Multi-connected air conditioning system and running method thereof
CN201273656Y (en) * 2008-08-25 2009-07-15 上海德科电子仪表有限公司 Outer circulation air flow control system
US8400091B2 (en) * 2010-03-19 2013-03-19 Renesas Electronics America Inc. Voltage regulator and cooling control integrated circuit
CN103049072A (en) * 2011-10-17 2013-04-17 珠海格力电器股份有限公司 Electrical appliance mainboard and model selection port control circuit and method
JP2015055450A (en) * 2013-09-13 2015-03-23 ダイキン工業株式会社 Air conditioning device
CN106440220A (en) * 2016-10-12 2017-02-22 青岛海尔空调器有限总公司 Air conditioner standby circuit and air conditioner
CN107171560A (en) * 2017-06-19 2017-09-15 广州金升阳科技有限公司 A kind of ON-OFF control circuit
CN107408818A (en) * 2015-02-10 2017-11-28 智能量科技有限公司 Activation and the switching system and method that deactivate for electrical device
CN107592054A (en) * 2017-08-31 2018-01-16 广东美芝制冷设备有限公司 Motor control method, motor control assembly and storage medium
CN108507118A (en) * 2018-03-09 2018-09-07 珠海格力电器股份有限公司 A kind of method of supplying power to of multi-online air-conditioning system, device, outer machine and interior machine
CN108534320A (en) * 2018-03-29 2018-09-14 广东美的制冷设备有限公司 Air conditioner cooling activation control method, air conditioner and storage medium
CN108709296A (en) * 2018-05-31 2018-10-26 广东美芝制冷设备有限公司 Power control circuit, air-conditioning and the control method of the outdoor unit of air-conditioning
CN109028508A (en) * 2018-06-01 2018-12-18 青岛海尔空调电子有限公司 Air-conditioning line control machine power supply communication circuit
CN109917218A (en) * 2019-04-30 2019-06-21 深圳开立生物医疗科技股份有限公司 Power-on and power-off test macro, method and the electrical equipment of electrical equipment
CN110285552A (en) * 2019-07-01 2019-09-27 珠海格力电器股份有限公司 Line control machine power-supplying circuit, air-conditioning internal machine and air-conditioning system
CN110710173A (en) * 2018-05-09 2020-01-17 日立江森自控空调有限公司 Air conditioner system
CN110830026A (en) * 2019-11-28 2020-02-21 广东美的暖通设备有限公司 Optical coupling isolation communication circuit, circuit board and air conditioner

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0510576A (en) * 1991-07-01 1993-01-19 Toshiba Corp Air conditioner
JPH066357A (en) * 1992-06-18 1994-01-14 Daikin Ind Ltd Transmitter
CN2163341Y (en) * 1993-08-07 1994-04-27 中国人民解放军89001部队 Energy saving device for air conditioner
KR100706206B1 (en) * 2005-10-24 2007-04-12 삼성전자주식회사 Device for preheating compressor and method thereof
EP1892483A2 (en) * 2006-08-25 2008-02-27 Sanyo Electric Co., Ltd. Air conditioner and method of controlling the same
CN101231014A (en) * 2007-01-25 2008-07-30 三星电子株式会社 Multi-connected air conditioning system and running method thereof
CN201273656Y (en) * 2008-08-25 2009-07-15 上海德科电子仪表有限公司 Outer circulation air flow control system
US8400091B2 (en) * 2010-03-19 2013-03-19 Renesas Electronics America Inc. Voltage regulator and cooling control integrated circuit
CN103049072A (en) * 2011-10-17 2013-04-17 珠海格力电器股份有限公司 Electrical appliance mainboard and model selection port control circuit and method
JP2015055450A (en) * 2013-09-13 2015-03-23 ダイキン工業株式会社 Air conditioning device
CN107408818A (en) * 2015-02-10 2017-11-28 智能量科技有限公司 Activation and the switching system and method that deactivate for electrical device
CN106440220A (en) * 2016-10-12 2017-02-22 青岛海尔空调器有限总公司 Air conditioner standby circuit and air conditioner
CN107171560A (en) * 2017-06-19 2017-09-15 广州金升阳科技有限公司 A kind of ON-OFF control circuit
CN107592054A (en) * 2017-08-31 2018-01-16 广东美芝制冷设备有限公司 Motor control method, motor control assembly and storage medium
CN108507118A (en) * 2018-03-09 2018-09-07 珠海格力电器股份有限公司 A kind of method of supplying power to of multi-online air-conditioning system, device, outer machine and interior machine
CN108534320A (en) * 2018-03-29 2018-09-14 广东美的制冷设备有限公司 Air conditioner cooling activation control method, air conditioner and storage medium
CN110710173A (en) * 2018-05-09 2020-01-17 日立江森自控空调有限公司 Air conditioner system
CN108709296A (en) * 2018-05-31 2018-10-26 广东美芝制冷设备有限公司 Power control circuit, air-conditioning and the control method of the outdoor unit of air-conditioning
CN109028508A (en) * 2018-06-01 2018-12-18 青岛海尔空调电子有限公司 Air-conditioning line control machine power supply communication circuit
CN109917218A (en) * 2019-04-30 2019-06-21 深圳开立生物医疗科技股份有限公司 Power-on and power-off test macro, method and the electrical equipment of electrical equipment
CN110285552A (en) * 2019-07-01 2019-09-27 珠海格力电器股份有限公司 Line control machine power-supplying circuit, air-conditioning internal machine and air-conditioning system
CN110830026A (en) * 2019-11-28 2020-02-21 广东美的暖通设备有限公司 Optical coupling isolation communication circuit, circuit board and air conditioner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
蒋治国: "《现代家电原理与维修》", 31 July 2007, 北京理工大学出版社 *

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