CN107906697B - Air conditioner - Google Patents
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- CN107906697B CN107906697B CN201710962563.2A CN201710962563A CN107906697B CN 107906697 B CN107906697 B CN 107906697B CN 201710962563 A CN201710962563 A CN 201710962563A CN 107906697 B CN107906697 B CN 107906697B
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Abstract
The invention discloses an air conditioner, which comprises an indoor unit and an outdoor unit, wherein the indoor unit comprises a first power supply circuit, a first control unit, a first communication circuit and a second switch circuit; when the first control unit receives a starting signal, the first switch circuit is controlled to be conducted, so that the first power supply circuit supplies power to the auxiliary power supply circuit, the auxiliary power supply circuit supplies power to the second control unit after being electrified, so that the second control unit controls the self-power supply loop to supply power to the outdoor unit, the outdoor unit works, the air conditioner enters a normal running state, and meanwhile, the first control unit controls the first switch circuit to be cut off; when the first control unit receives the standby signal, a standby instruction is sent to the second control unit, so that the second control unit controls the self-powered loop to stop supplying power to the outdoor unit, and the air conditioner enters a standby state. The technical scheme of the invention has the characteristic of low power consumption.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner.
Background
When the existing air conditioner is in a standby state, the outdoor unit of the air conditioner keeps a low-voltage power supply state so as to be convenient for being quickly awakened when the air conditioner is started next time. Thus, standby power consumption of the air conditioner is increased.
Disclosure of Invention
The invention mainly aims to provide an air conditioner, aiming at reducing the standby power consumption of the air conditioner.
In order to achieve the above object, the air conditioner provided by the present invention comprises an indoor unit and an outdoor unit, wherein the indoor unit comprises a first power supply circuit, a first control unit, a first communication circuit and a second switch circuit, and the outdoor unit comprises an auxiliary power supply circuit, a second communication circuit, a second control unit and a self-powered loop; a first output end of the first power supply circuit is connected with a power supply end of the first control unit, and a second output end of the first power supply circuit, an input end of the first switch circuit and an input end of the self-power supply loop are interconnected; the output end of the first control unit is connected with the input end of the first communication circuit, the first control end of the first control unit is connected with the controlled end of the first switch circuit, and the output end of the first switch circuit, the output end of the first communication circuit, the input end of the auxiliary power supply circuit and the input end of the second communication circuit are interconnected; the output end of the auxiliary power circuit, the output end of the self-powered loop and the power end of the second control unit are interconnected, the output end of the second communication circuit is connected with the input end of the second control unit, and the control end of the second control unit is connected with the controlled end of the self-powered loop, wherein the first power supply circuit is used for providing input power for the self-powered loop and providing input power for the auxiliary power circuit when the first switch circuit is in a conducting state; the first control unit is used for controlling the first switch circuit to be switched on when receiving a starting signal, controlling the first switch circuit to be switched off after the air conditioner is started, and transmitting a standby signal to the second control unit through the first communication circuit and the second communication circuit when receiving a standby signal; the auxiliary power supply circuit is used for processing the input power supply provided by the first power supply circuit and outputting the power supply of the second control unit; the second control unit is configured to control the self-powered circuit to supply power to the outdoor unit when a power supply is obtained, and control the self-powered circuit to stop supplying power to the outdoor unit when a standby signal is received.
Preferably, the first communication circuit includes a first communication unit, a first diode, and a fourth resistor, an input end of the first communication unit is an input end of the first communication circuit, an output end of the first communication unit is connected to an anode of the first diode, a cathode of the first diode is connected to a first end of the fourth resistor, and a second end of the fourth resistor is an output end of the first communication circuit.
Preferably, the indoor unit further includes a second switch circuit, an input terminal of the second switch circuit, a second output terminal of the first power supply circuit, an input terminal of the first switch circuit, and an input terminal of the self-powered loop are interconnected, an output terminal of the second switch circuit is connected to a power supply terminal of the first communication circuit, and a controlled terminal of the first switch circuit is connected to the second control terminal of the first control unit.
Preferably, the second communication circuit includes a second communication unit, a third diode and a third resistor, an anode of the third diode is an input end of the second communication circuit, a cathode of the third diode is connected to a first end of the third resistor, a second end of the third resistor is connected to an input end of the second communication unit, and an output end of the second communication unit is an output end of the second communication circuit.
Preferably, the auxiliary power supply circuit includes a second diode, a first resistor, a second resistor, a single-pole double-throw switch, a rectifier bridge and a second power supply circuit, an anode of the second diode is an input terminal of the auxiliary power supply circuit, a cathode of the second diode is connected with a first end of the first resistor, a second end of the first resistor is connected with a first input terminal of the single-pole double-throw switch, and a common terminal of the single-pole double-throw switch is connected with a first end of the second resistor; the output end of the second resistor is connected with the input end of the rectifier bridge, and the output end of the rectifier bridge is connected with the input end of the second power supply circuit.
Preferably, the self-power supply circuit includes a fifth switch, the second resistor, the single-pole double-throw switch, the rectifier bridge, and the second power supply circuit, an input terminal of the fifth switch is connected to a second input terminal of the single-pole double-throw switch, a connection node of the fifth switch is an input terminal of the self-power supply circuit, an output terminal of the fifth switch, a second terminal of the second resistor, and an input terminal of the rectifier bridge are interconnected, a controlled terminal of the fifth switch is a controlled terminal of the self-power supply circuit, an output terminal of the rectifier bridge is connected to an input terminal of the second power supply circuit, and an output terminal of the second power supply circuit is an output terminal of the self-power supply circuit.
Preferably, the second resistor is a thermistor.
Preferably, the air conditioner further includes N-1 indoor units, the outdoor unit further includes N-1 second communication circuits, the auxiliary power circuit further includes N-1 power terminals, the second control unit further includes N-1 input terminals, N is an integer greater than or equal to 2, and any one of the N indoor units is selected as a target indoor unit: the second output end of the first power supply circuit in the target indoor unit, the input end of the first switch circuit in the target indoor unit and the input end of the self-powered loop in the outdoor unit are interconnected, the output end of the first switch circuit in the target indoor unit, the output end of the first communication circuit in the target indoor unit, the corresponding power end of the auxiliary power circuit in the outdoor unit and the input end of the corresponding second communication circuit in the outdoor unit are interconnected, and the output end of the corresponding second communication circuit in the outdoor unit is connected with the corresponding input end of the second control unit in the outdoor unit.
The technical scheme of the invention is as follows: if the air conditioner is in a standby state, when the first control unit receives a starting signal, firstly, the first control unit controls the first switch circuit to be conducted so that the first power supply circuit provides an input power supply for the auxiliary power supply circuit through the first switch circuit; then, the auxiliary power circuit supplies power to the second control unit, so that the second control unit controls the self-power supply loop to supply power to the outdoor unit, the outdoor unit of the air conditioner is awakened up till then, meanwhile, the first control unit controls the first switch circuit to be cut off, the air conditioner enters a normal operation state, and response is fast. If the air conditioner is in a normal operation state, when the first control unit receives a standby signal, the first control unit transmits the standby signal to the second control unit through the first communication circuit and the second communication circuit, so that the second control unit controls the self-power supply loop to stop supplying power to the outdoor unit, and at this point, the air conditioner enters the standby state again, and the standby power consumption is zero. Because the outdoor unit of the air conditioner can be rapidly awakened when the air conditioner is in a standby state, and the standby power consumption of the outdoor unit is zero, compared with the prior art, the technical scheme of the invention has the characteristic of low standby power consumption.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a functional block diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of functional modules of an air conditioner according to another embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of an air conditioner according to another embodiment of the present invention;
fig. 4 is a schematic circuit diagram of an air conditioner according to still another embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | First |
100 | Second power supply circuit | D1 | First diode |
| 20 | A |
31 | First communication unit | D2 | |
| 30 | |
61 | Second communication unit | D3 | |
| 40 | First switch circuit | K1 | First relay switch | R1 | A |
| 50 | Auxiliary power supply circuit | K2 | Second relay switch | R3 | |
| 60 | Second communication circuit | K3 | Single-pole double-throw switch | R3 | |
| 70 | Second control unit | K5 | Fifth switch | R4 | |
| 80 | Self-powered loop | L | Live wire | BR | |
| 90 | Second switch circuit | N | Zero line | S | Communication line |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the descriptions relating to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an air conditioner.
Referring to fig. 1, in an embodiment, the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes a first power supply circuit 10, a first control unit 20, a first communication circuit 30 and a first switch circuit 40, and the outdoor unit includes an auxiliary power circuit 50, a second communication circuit 60, a second control unit 70 and a self-powered circuit 80.
A first output terminal of the first power supply circuit 10 is connected to a power supply terminal of the first control unit 20, and a second output terminal of the first power supply circuit 10, an input terminal of the first switch circuit 40, and an input terminal of the self-power supply loop 80 are interconnected; the output end of the first control unit 20 is connected with the input end of the first communication circuit 30, the first control end of the first control unit 20 is connected with the controlled end of the first switch circuit 40, and the output end of the first switch circuit 40, the output end of the first communication circuit 30, the input end of the auxiliary power supply circuit 50 and the input end of the second communication circuit 60 are interconnected; the output of the auxiliary power circuit 50, the output of the self-power supply loop 80 and the power terminal of the second control unit 70 are interconnected, the output of the second communication circuit 60 is connected to the input of the second control unit 70, and the control terminal of the second control unit 70 is connected to the controlled terminal of the self-power supply loop 80.
Here, the first power supply circuit 10 is used for providing the input power for the self-power supply circuit 80 and providing the input power for the auxiliary power supply circuit 50 when the first switch circuit 40 is in the conducting state. The first control unit 20 is configured to control an on/off state of the first switch circuit 40 according to the power-on signal to turn on/off the input power of the auxiliary power circuit 50, and transmit a standby signal to the second control unit 70 through the first communication circuit 30 and the second communication circuit 60, so that the second control unit 70 controls the self-power supply circuit 80 to stop supplying power to the outdoor unit. The auxiliary power circuit 50 is configured to process the input power provided by the first power circuit 10 when the self-power supply circuit 80 is not activated, so as to output the power of the second control unit 70 to power the second control unit 70. The second control unit 70 is configured to control the self-power supply circuit 80 to supply power to the outdoor unit when the power supply is obtained, and control the self-power supply circuit 80 to stop supplying power to the outdoor unit when the standby signal is received.
The connection line between the first power supply circuit 10 and the self-powered circuit 80 is a live line L and a zero line N, and the connection line between the output end of the first switch circuit 40 and the auxiliary power circuit 50 is a communication line S.
In an embodiment, the first switch circuit 40 may be selected as a first relay switch K1, the common terminal of the first relay switch K1 is an input terminal of the first switch circuit 40, the normally-open point of the first relay switch K1 is an output terminal of the first switch circuit 40, and the first control unit 20 may control the operating state of the first relay switch K1 by controlling the connection state of the negative electrode of the coil of the first relay switch K1 and the ground line. For example, when the first control unit 20 controls the coil cathode of the first relay switch K1 to be connected to the ground, the common terminal of the first relay switch K1 is connected to the normally open point, which is equivalent to the first switch circuit 40 being turned on; when the first control unit 20 controls the coil cathode of the first relay switch K1 to be disconnected from the ground, the common terminal of the first relay switch K1 is communicated with the normally closed point, which is equivalent to the first switch circuit 40 being turned off.
In another embodiment, the first switch circuit 40 can be selected as a transistor (e.g., a triode, a field effect transistor), and the first control unit 20 can control the connection state of the collector junction and the emitter junction of the transistor by controlling the gate voltage of the transistor. Since the types of transistors are different, the required gate voltages are different, and the kinds of transistors are many, so the detailed description of how the first control unit 20 controls the gate voltages of the transistors is not provided herein.
Specifically, in the working process of the air conditioner:
if the air conditioner is in a standby state, when the first control unit 20 receives the start signal, first, the first control unit 20 controls the first switch circuit 40 to be turned on, so that the first power supply circuit 10 provides an input power supply for the auxiliary power supply circuit 50 through the first switch circuit 40; then, the auxiliary power circuit 50 supplies power to the second control unit 70, so that the second control unit 70 controls the self-power supply circuit 80 to supply power to the outdoor unit, and the outdoor unit is woken up. Meanwhile, the first control unit 20 controls the first switching circuit 40 to be turned off, and the air conditioner enters a normal operation state, and the response is fast. If the air conditioner is in the normal operation state, when the first control unit 20 receives the standby signal, the first control unit 20 transmits the standby signal to the second control unit 70 through the first communication circuit 30 and the second communication circuit 60, so that the second control unit 70 controls the self-power supply circuit 80 to stop supplying power to the outdoor unit, and at this time, the air conditioner enters the standby state again, and the standby power consumption is zero.
Because the outdoor unit of the air conditioner can be rapidly awakened when the air conditioner is in a standby state, and the standby power consumption of the outdoor unit is zero, compared with the prior art, the technical scheme of the invention has the characteristic of low standby power consumption.
Preferably, referring to fig. 3, in an embodiment of the invention, the first communication circuit 30 includes a first communication unit 31, a first diode D1 and a fourth resistor R4, an input terminal of the first communication unit 31 is an input terminal of the first communication circuit 30, an output terminal of the first communication unit 31 is connected to an anode of the first diode D1, a cathode of the first diode D1 is connected to a first terminal of the fourth resistor R4, and a second terminal of the fourth resistor R4 is an output terminal of the first communication circuit 30.
As can be seen from the above, during the operation of the air conditioner, the first power supply circuit 10 needs to provide the input power to the auxiliary power circuit 50 through the first switch circuit 40, and the first control unit 20 needs to provide the standby signal to the second control unit 70 through the first communication circuit 30 and the second communication circuit 60. And the first switch circuit 40, the auxiliary power supply circuit 50, the first communication circuit 30, and the second communication circuit 60 are interconnected. Thus, if the connection is wrong, the input power provided by the first power supply circuit 10 to the auxiliary power supply circuit 50 may flow backward to the first communication circuit 30, causing damage.
For this reason, the present embodiment adds the first diode D1 and the fourth resistor R4 to the first communication unit 31 capable of realizing the communication function. Because the diode has the unidirectional conduction characteristic, the current can be prevented from flowing backwards. In addition, the fourth resistor R4 can also limit the magnitude of the backward flow current when the backward flow of the current occurs in time. The reliability can be enhanced by additionally arranging the first diode D1 and the fourth resistor R4.
Referring to fig. 3, in order to further enhance the reliability of the air conditioner, in an embodiment, the indoor unit further includes a second switch circuit 90, an input terminal of the second switch circuit 90, a second output terminal of the first power supply circuit 10, an input terminal of the first switch circuit 40, and an input terminal of the self-power supply circuit are interconnected, an output terminal of the second switch circuit 90 is connected to the power source terminal of the first communication circuit 30, and a controlled terminal of the first switch circuit 40 is connected to the second control terminal of the first control unit 20.
Here, the second switch circuit 90 may be selected as the second relay switch K2, and the control of the second relay switch K2 may be referred to the above embodiment.
Specifically, when the first control unit 20 receives the start signal, the second switch circuit 90 is first controlled to be turned on, so that the first communication circuit 30 operates. After the first communication circuit 30 is operated, the first switch circuit 40 is controlled to be turned on, so that the first power supply circuit 10 supplies power to the auxiliary power supply circuit 50 through the first switch circuit 40.
It can be understood that the second switch circuit 90 is added to reduce the probability of malfunction of the air conditioner, thereby improving reliability.
It should be noted that when the first power supply circuit 10 is not required to supply power to the first communication circuit 30 through the second switch circuit 90, an independent power supply source may be provided to supply power to the first communication circuit 30.
Preferably, with reference to fig. 3, the second communication circuit 60 includes a second communication unit 61, a third diode D3 and a third resistor R3, an anode of the third diode D3 is an input terminal of the second communication circuit 60, a cathode of the third diode D3 is connected to a first terminal of the third resistor R3, a second terminal of the third resistor R3 is connected to the input terminal of the second communication unit 61, and an output terminal of the second communication unit 61 is an output terminal of the second communication circuit 60.
Here, the third diode D3 is used to prevent the air conditioner from being wired incorrectly, and the third resistor R3 is used to limit the magnitude of the current flowing into the second communication unit 61.
Preferably, with reference to fig. 3, in an embodiment, the auxiliary power circuit 50 includes a second diode D2, a first resistor R1, a second resistor R2, a single-pole double-throw switch K3, a rectifier bridge BR, and a second power supply circuit 100, an anode of the second diode D2 is an input terminal of the auxiliary power circuit 50, a cathode of the second diode D2 is connected to a first end of the first resistor R1, a second end of the first resistor R1 is connected to a first input terminal (e.g., terminal 3 shown in fig. 3) of the single-pole double-throw switch K3, and a common terminal (e.g., terminal 1 shown in fig. 2) of the single-pole double-throw switch K3 is connected to a first end of the second resistor R2; the output end of the second resistor R2 is connected to the input end of the rectifier bridge BR, and the output end of the rectifier bridge BR is connected to the input end of the second power supply circuit 100.
When the first power supply circuit 10 provides the input power to the auxiliary power supply circuit 50 through the first switch circuit 40, the input power flows into the second power supply circuit 100 through the second diode D2, the first resistor R1, the first input terminal of the single-pole double-throw switch K3, the common terminal of the single-pole double-throw switch K3, the second resistor R2 and the rectifier bridge BR in sequence, so that the second power supply circuit 100 outputs the power supply of the second control unit 70.
The second diode D2 is used to prevent negative voltage input and thus limit the energy of the input power, and the first resistor R1 and the second resistor R2 are used to limit the magnitude of the input current and thus suppress the surge current.
Preferably, referring to fig. 3, in an embodiment, the self-power supply circuit 80 includes a fifth switch K5, a second resistor R2, a single-pole double-throw switch K3, a rectifier bridge BR, and a second power supply circuit 100, an input terminal of the fifth switch K5 is connected to a second input terminal (e.g., terminal 2 shown in fig. 3) of the single-pole double-throw switch K3, and a connection node thereof is an input terminal of the self-power supply circuit 80, an output terminal of the fifth switch K5, a second terminal of the second resistor R2, and an input terminal of the rectifier bridge BR are interconnected, a controlled terminal of the fifth switch K5 is a controlled terminal of the self-power supply circuit 80, an output terminal of the rectifier bridge BR is connected to an input terminal of the second power supply circuit 100, and an output terminal of the second power supply circuit 100 is an output terminal of the self.
Specifically, after the auxiliary power circuit 50 provides the power supply for the second control unit 70, the second control unit 70 controls the fifth switch K5 to be closed, and the input power provided by the first power supply circuit 10 for the self-power supply loop 80 is sequentially input to the second power supply circuit 100 through the fifth switch K5 and the rectifier bridge BR, so that the second power supply circuit 100 provides power for the second control unit 70.
It should be noted that, after the above process, when the output voltage of the first power supply circuit 10 reaches the preset value, the second control unit 70 controls the common terminal of the single-pole double-throw switch K3 to be connected to the second input terminal, the first power supply circuit 10 supplies the input power provided by the self-power supply loop 80 to the second power supply circuit 100 through the second input terminal of the single-pole double-throw switch K3, the common terminal of the single-pole double-throw switch K3, the second resistor R2 and the rectifier bridge BR in sequence, so that the second power supply circuit 100 continues to supply power to the second control unit 70. Thereafter, the second control unit 70 controls the fifth switch K5 to be opened. Here, the second resistor R2 is used to limit the magnitude of the input current, thereby suppressing the inrush current.
Preferably, the second resistor R2 is a thermistor. Thus, after the circuit has been in operation for a period of time, the resistance of the second resistor R2 is reduced, thereby reducing the useless work of the circuit.
Further, referring to fig. 2, in order to enhance the adaptability of the air conditioner, in an embodiment, the air conditioner further includes N-1 indoor units, the outdoor unit further includes N-1 second communication circuits 60, the auxiliary power circuit 50 further includes N-1 power terminals, the second control unit 70 further includes N-1 input terminals, N is an integer greater than or equal to 2, and any one of the N indoor units is selected as a target indoor unit: the second output terminal of the first power supply circuit 10 in the target indoor unit, the input terminal of the first switch circuit 40 in the target indoor unit, and the input terminal of the self-power supply loop 80 in the outdoor unit are interconnected, the output terminal of the first switch circuit 40 in the target indoor unit, the output terminal of the first communication circuit 30 in the target indoor unit, the corresponding power terminal of the auxiliary power circuit 50 in the outdoor unit, and the input terminal of the corresponding second communication circuit 60 in the outdoor unit are interconnected, and the output terminal of the corresponding second communication circuit 60 in the outdoor unit is connected with the corresponding input terminal of the second control unit 70 in the outdoor unit.
The working principle of the air conditioner is described below with reference to fig. 1 to 4:
(1) if the air conditioner is in the standby state, when the first control unit 20 receives the start signal:
first, the first control unit 20 turns on the second switch circuit 90, the first power supply circuit 10 is the first communication circuit 30 through the second switch circuit 90, and the first communication circuit 30 is started.
At this time, if the first control unit 20 can receive the signal from the second control unit 70, it indicates that the outdoor unit is powered on, the indoor unit does not need to wake up the outdoor unit, and the air conditioner directly enters a normal operating state.
If the first control unit 20 does not receive the signal from the second control unit 70, it indicates that the outdoor unit is not powered and the indoor unit needs to wake up the outdoor unit.
When the indoor unit needs to wake up the outdoor unit:
the first control unit 20 controls the first switch circuit 40 to be turned on, and the first power supply circuit 10 supplies power to the auxiliary power supply circuit 50 through the first switch circuit 40. An input power supply of the auxiliary power supply circuit 50 is sequentially input to the second power supply circuit 100 through the second diode D2, the first resistor R1, the first input end of the single-pole double-throw switch K3, the common end of the single-pole double-throw switch K3, the second resistor R2 and the rectifier bridge BR, and the second power supply circuit 100 supplies power to the second control circuit after being powered on.
After the second control circuit is started, the fifth switch K5 is controlled to be turned on, and the self-power supply loop 80 is started. Meanwhile, the second control circuit outputs a feedback signal to the first control unit 20 through the second communication circuit 60 and the first communication circuit 30, so that the first control unit 20 controls the first switch circuit 40 to be turned off. The input power of the self-power supply loop 80 is sequentially input to the second power supply circuit 100 through the fifth switch K5 and the rectifier bridge BR, and the second power supply circuit 100 continues to supply power to the second control unit 70.
When the second control unit 70 detects that the output voltage of the second power supply circuit 100 reaches the preset value and lasts for the preset time, the second input end of the single-pole double-throw switch K3 is controlled to be connected with the common end, the input power of the self-power supply loop 80 is sequentially input to the second power supply circuit 100 through the second input end of the single-pole double-throw switch K3, the common end of the single-pole double-throw switch K3, the second resistor R2 and the rectifier bridge BR, the second power supply circuit 100 continues to supply power to the second control unit 70, thereafter, the second control unit 70 controls the fifth switch K5 to be disconnected, the outdoor unit is awakened, and the air conditioner enters a normal working state.
(2) If the air conditioner is in a normal operating state, when the first control unit 20 receives the standby signal:
first, the first control unit 20 transmits a standby signal to the second control circuit through the first communication circuit 30 and the second communication circuit 60;
then, the second control unit 70 controls the first input terminal of the single-pole double-throw switch K3 to be connected to the common terminal, the current path between the first power supply circuit 10 and the second power supply circuit 100 is cut off, and the second power supply circuit 100 stops supplying power to the second control unit 70. At this point, the air conditioner enters a standby state.
Referring to fig. 4, it should be noted that, when the air conditioner has a plurality of indoor units, the second control unit 70 enters the standby state when receiving the standby signal from each indoor unit.
The technical scheme of the invention has the following beneficial effects:
(1) the power consumption of the outdoor unit of the air conditioner is zero when in standby, and the standby power consumption of the corresponding air conditioner is low.
(2) By providing the first diode D1 and the fourth resistor R4 in the first communication circuit 30, it is possible to prevent the first communication unit 31 from being damaged by current flowing backward, and to prevent a wiring error of the circuit, which is highly reliable.
(3) The third diode D3 and the third resistor R3 are provided in the second communication circuit 60, so that damage caused by current flowing into the second communication unit can be prevented, and circuit connection errors can be prevented, and the reliability is high.
(4) The second diode D2 is arranged to block the input negative power supply, thereby reducing the energy of the input power supply, suppressing the surge current and having high reliability.
(5) The first resistor R1 and the second resistor R2 are provided to further suppress surge current and improve reliability.
(6) The second input end of the single-pole double-throw switch K3 is controlled to be connected with the common end, and then the fifth switch K5 is controlled to be disconnected, so that the current flowing through the self-power supply loop 80 is continuous, voltage sudden change is avoided, and the reliability is high.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. An air conditioner is characterized by comprising an indoor unit and an outdoor unit, wherein the indoor unit comprises a first power supply circuit, a first control unit, a first communication circuit and a first switch circuit; a first output end of the first power supply circuit is connected with a power supply end of the first control unit, and a second output end of the first power supply circuit, an input end of the first switch circuit and an input end of the self-power supply loop are interconnected; the output end of the first control unit is connected with the input end of the first communication circuit, the first control end of the first control unit is connected with the controlled end of the first switch circuit, and the output end of the first switch circuit, the output end of the first communication circuit, the input end of the auxiliary power supply circuit and the input end of the second communication circuit are interconnected; the output end of the auxiliary power supply circuit, the output end of the self-power supply loop and the power supply end of the second control unit are interconnected, the output end of the second communication circuit is connected with the input end of the second control unit, and the control end of the second control unit is connected with the controlled end of the self-power supply loop; wherein,
the first power supply circuit is used for providing an input power supply for the self-powered loop and providing an input power supply for the auxiliary power supply circuit when the first switch circuit is in a conducting state;
the first control unit is used for controlling the first switch circuit to be switched on when receiving a starting signal, controlling the first switch circuit to be switched off after the air conditioner is started, and transmitting a standby signal to the second control unit through the first communication circuit and the second communication circuit when receiving a standby signal;
the auxiliary power supply circuit is used for processing the input power supply provided by the first power supply circuit and outputting the power supply of the second control unit;
the second control unit is used for controlling the self-powered loop to supply power to the outdoor unit when a power supply is obtained, and controlling the self-powered loop to stop supplying power to the outdoor unit when a standby signal is received;
the self-power supply loop comprises a fifth switch, a second resistor, a single-pole double-throw switch, a rectifier bridge and a second power supply circuit, wherein the input end of the fifth switch is connected with the second input end of the single-pole double-throw switch, the connection node of the fifth switch is the input end of the self-power supply loop, the common end of the single-pole double-throw switch is connected with the first end of the second resistor, the output end of the fifth switch, the second end of the second resistor and the input end of the rectifier bridge are interconnected, the controlled end of the fifth switch is the controlled end of the self-power supply loop, the output end of the rectifier bridge is connected with the input end of the second power supply circuit, and the output end of the second power supply circuit is the output end of the self-power supply loop.
2. The air conditioner according to claim 1, wherein the first communication circuit includes a first communication unit, a first diode, and a fourth resistor, an input terminal of the first communication unit is an input terminal of the first communication circuit, an output terminal of the first communication unit is connected to an anode of the first diode, a cathode of the first diode is connected to a first terminal of the fourth resistor, and a second terminal of the fourth resistor is an output terminal of the first communication circuit.
3. The air conditioner as claimed in claim 1, wherein the indoor unit further comprises a second switching circuit, an input terminal of the second switching circuit, a second output terminal of the first power supply circuit, an input terminal of the first switching circuit and an input terminal of the self power supply circuit are interconnected, an output terminal of the second switching circuit is connected to a power supply terminal of the first communication circuit, and a controlled terminal of the second switching circuit is connected to a second control terminal of the first control unit.
4. The air conditioner according to claim 1, wherein the second communication circuit includes a second communication unit, a third diode, and a third resistor, an anode of the third diode is an input terminal of the second communication circuit, a cathode of the third diode is connected to a first terminal of the third resistor, a second terminal of the third resistor is connected to an input terminal of the second communication unit, and an output terminal of the second communication unit is an output terminal of the second communication circuit.
5. The air conditioner according to claim 1, wherein the auxiliary power supply circuit includes a second diode, a first resistor, the second resistor, the single-pole double-throw switch, the rectifier bridge, and the second power supply circuit, an anode of the second diode is an input terminal of the auxiliary power supply circuit, a cathode of the second diode is connected to a first terminal of the first resistor, and a second terminal of the first resistor is connected to a first input terminal of the single-pole double-throw switch; the output end of the second resistor is connected with the input end of the rectifier bridge, and the output end of the rectifier bridge is connected with the input end of the second power supply circuit.
6. The air conditioner according to claim 5, wherein said second resistor is a thermistor.
7. The air conditioner according to claim 1, wherein said air conditioner further comprises N-1 of said indoor units, said outdoor unit further comprises N-1 of said second communication circuit, said auxiliary power circuit further comprises N-1 of power terminals, said second control unit further comprises N-1 of input terminals, said N is an integer greater than or equal to 2, any one of the N indoor units is selected as a target indoor unit: the second output end of the first power supply circuit in the target indoor unit, the input end of the first switch circuit in the target indoor unit and the input end of the self-powered loop in the outdoor unit are interconnected, the output end of the first switch circuit in the target indoor unit, the output end of the first communication circuit in the target indoor unit, the corresponding power end of the auxiliary power circuit in the outdoor unit and the input end of the corresponding second communication circuit in the outdoor unit are interconnected, and the output end of the corresponding second communication circuit in the outdoor unit is connected with the corresponding input end of the second control unit in the outdoor unit.
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| CN201710962563.2A CN107906697B (en) | 2017-10-13 | 2017-10-13 | Air conditioner |
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| CN201710962563.2A CN107906697B (en) | 2017-10-13 | 2017-10-13 | Air conditioner |
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| CN107906697B true CN107906697B (en) | 2020-05-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764503B (en) * | 2019-01-15 | 2021-04-16 | 海信（广东）空调有限公司 | Outdoor power supply control circuit of air conditioner and air conditioner |
| CN112393395B (en) * | 2019-08-15 | 2022-01-21 | 青岛海尔空调器有限总公司 | Circuit for identifying low-standby-power-consumption outdoor unit and air conditioner |
| CN110829817B (en) * | 2019-11-18 | 2022-02-11 | 广东美的暖通设备有限公司 | Control circuit, control method and device of control circuit and air conditioner |
| CN110793152B (en) * | 2019-11-20 | 2020-09-29 | 珠海格力电器股份有限公司 | Dual-system air conditioner and load control method and device thereof |
| CN111365826A (en) * | 2020-04-21 | 2020-07-03 | 珠海拓芯科技有限公司 | Power supply system and air conditioner |
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| JP2017003193A (en) * | 2015-06-10 | 2017-01-05 | ダイキン工業株式会社 | Air conditioning system |
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