Air conditioning power supply system and air conditioner

Abstract

The present invention discloses an air conditioner power supply system and an air conditioner, relating to the field of power supply circuit technology. The system comprises an indoor unit and an outdoor unit. The indoor unit includes an indoor unit communication module. The outdoor unit includes a first switch module, an outdoor unit communication module, and a power-on control module. The indoor unit communication module and the outdoor unit communication module establish a current loop communication via a communication line set. The first switch module is used to control whether the outdoor unit is powered on. The power-on control module is connected to the outdoor unit communication module and the first switch module. When the indoor unit receives a power-on command, the indoor unit communication module controls the indoor unit communication module to conduct the current loop between the indoor and outdoor units, so that the power-on control module controls the first switch module to conduct. This system can reduce the amount of copper used and the cost of the power supply line set, reduce the potential heating risk of the wiring terminals, and reduce the size and cost of the electronic control.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply circuits, and in particular to an air-conditioning power supply system and an air conditioner. Background Art

[0002] Currently, split-type air conditioners typically use the following power supply method: Mains power is connected to the indoor unit, then supplied to the outdoor unit via a relay within the indoor unit. The indoor unit then controls the outdoor unit's power supply by turning the relay's contacts on and off. This power supply method has several drawbacks: the indoor unit's electrical control panel must pass all the current from the outdoor unit, posing a risk of overheating at the wiring terminals; the indoor unit requires a high-current relay to control the outdoor unit's power supply, which is costly; the power supply wiring between the indoor and outdoor units requires thickened copper wire to power the entire system, which is also costly; and the numerous connecting wires complicate installation and can easily lead to errors. Summary of the Invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an air-conditioning power supply system and an air conditioner, which can reduce the amount of copper used and the cost of the power supply line group, reduce the potential heating hazards of the terminal blocks, reduce the size of the electronic control and reduce the cost of the electronic control.

[0004] In a first aspect, an embodiment of the present invention provides an air-conditioning power supply system, comprising an indoor unit and an outdoor unit;

[0005] The indoor unit includes an indoor unit communication module;

[0006] The outdoor unit includes a first switch module, an outdoor unit communication module and a power-on control module. The indoor unit communication module establishes a current loop communication with the outdoor unit communication module via a communication line group. The first switch module is used to control whether the outdoor unit is powered on. The power-on control module is connected to the outdoor unit communication module and the first switch module respectively.

[0007] in:

[0008] When the indoor unit receives a power-on instruction, the indoor unit communication module is controlled to conduct the current loop between the indoor unit and the outdoor unit, so that the power-on control module controls the first switch module to conduct.

[0009] The air-conditioning power supply system provided according to the embodiment of the present invention has at least the following beneficial effects: by setting a first switch module on the outdoor unit to control whether the outdoor unit is powered on, and after receiving the power-on command, the indoor unit can control the indoor unit communication module to conduct the current loop between the indoor unit and the outdoor unit, thereby providing an excitation signal to the power-on control module through the current loop, and then triggering the power-on control module to control the first switch module to conduct, so that the outdoor unit is powered on; the indoor unit realizes power-on control of the outdoor unit in this way, so that the indoor unit does not need to pass the current of the outdoor unit, and the power supply line group between the indoor unit and the outdoor unit no longer needs to use thickened copper wire, which reduces the copper usage and cost of the power supply line group, and can reduce the heating risk, volume and cost of the indoor unit's terminal; the indoor unit also does not need to set a relay to control the power supply of the outdoor unit, which can save the space occupied by the indoor unit's electronic control and reduce the cost of the indoor unit's electronic control. In addition, the current and power passing through the indoor unit are reduced, the EMI interference of the indoor unit is also reduced, and EMC testing is easier to pass.

[0010] According to some embodiments of the present invention, the air conditioning power supply system provides an outdoor unit, wherein the outdoor unit further includes an external load and a first power terminal for accessing an external AC power supply, and the external load obtains power from the first power terminal through the first switch module.

[0011] According to some embodiments of the present invention, the air conditioning power supply system further comprises an indoor load, and the air conditioning power supply system further comprises a power supply line group connected between the indoor unit and the outdoor unit;

[0012] in:

[0013] In the indoor unit, the power supply line group is connected to the indoor load;

[0014] In the outdoor unit, the power supply line group is connected to the first power terminal.

[0015] In this embodiment, after the external AC power supply is connected to the first power terminal of the outdoor unit, power is supplied to the indoor unit through the first power supply line and the second power supply line, that is, the indoor unit directly obtains power from the first power terminal. On the other hand, power is supplied to the outdoor unit load through the first switch module, so that the indoor unit does not need to pass the current of the outdoor unit. The first power supply line and the second power supply line as the power supply line group between the indoor unit and the outdoor unit no longer need to use thick copper wires, which reduces the amount of copper used and the cost of the power supply line group, and can also reduce the heat generation risk, volume and cost of the indoor unit terminal; the indoor unit load can be directly powered after the external AC power supply is connected, waiting for the user to send a power-on command. When the indoor unit receives the power-on command, it controls the indoor unit communication module to be turned on, thereby forming a current loop between the indoor unit and the outdoor unit. Then, in the outdoor unit, the first switch module is controlled to be turned on through the power-on control module, and the outdoor unit's outdoor load is energized and works. The indoor unit does not need to set up a relay to control the power supply of the outdoor unit, which can save the space occupied by the indoor unit's electronic control and reduce the electronic control cost of the indoor unit. In addition, the current and power passing through the indoor unit are reduced, and the EMI interference of the indoor unit is also reduced, making it easier to pass the EMC test. The air-conditioning power supply system has fewer connections between the indoor units, which reduces the number of terminals that need to be configured, simplifies installation, and improves installation reliability.

[0016] According to some embodiments of the present invention, the air conditioning power supply system provided by the indoor unit further includes an indoor load and a second power supply terminal for connecting to an external AC power supply; the outdoor unit further includes an external load; and the air conditioning power supply system further includes a power supply line group connected between the indoor unit and the outdoor unit;

[0017] in:

[0018] In the indoor unit, the second power terminal is connected to the indoor load and the power supply line group;

[0019] In the outdoor unit, the outdoor load obtains power from the power supply line group through the first switch module.

[0020] According to some embodiments of the present invention, the air conditioning power supply system is provided, wherein the first switch module includes a first relay and a thermistor, the power supply line group includes a first power supply line and a second power supply line, the first power terminal includes a first terminal corresponding to the first power supply line and a second terminal corresponding to the second power supply line, the first terminal, the contact of the first relay, the thermistor and the external load are connected in sequence, and the two ends of the coil of the first relay are connected to the second terminal and the power-on control module.

[0021] According to some embodiments of the present invention, the air-conditioning power supply system provided, the outdoor unit further includes a micro-control module, the first switch module further includes a second relay, the contacts of the second relay are respectively connected to the first terminal and the outdoor unit load; the micro-control module is connected to the coil of the second relay, and is used to control the second relay to be turned on after the conduction time of the first relay reaches a preset time.

[0022] According to some embodiments of the present invention, the air conditioning power supply system provided, the power-on control module includes a first resistor, a second resistor, a first diode and a first transistor; the communication line group includes the second power supply line and the communication line; the second terminal, the first resistor, the second resistor, and the communication line are connected in sequence; the connection point between the first resistor and the second resistor is connected to the anode of the first diode, the cathode of the first diode is connected to the control pin of the first transistor, and the two switch pins of the first transistor are respectively connected to the coil of the first relay and the communication line.

[0023] According to some embodiments of the present invention, the air conditioning power supply system provided, the outdoor unit further includes a first optocoupler, the microcontroller module is connected to the light emitter of the first optocoupler, and the light receiver of the first optocoupler is connected to both ends of the second resistor.

[0024] According to the air conditioner power supply system provided by some embodiments of the present invention, after controlling the second relay to turn on, the microcontroller controls the first optocoupler to turn on, so as to turn off the first transistor and thus turn off the first relay.

[0025] According to some embodiments of the present invention, the air conditioning power supply system provided, the indoor unit also includes a first power supply module, the first power supply module includes a first DC end, a first capacitor and a first voltage regulator tube, the first DC end is connected to one end of the first capacitor, the anode of the first voltage regulator tube and the second power supply line, the other end of the first capacitor and the cathode of the first voltage regulator tube are connected to the indoor unit communication module.

[0026] According to some embodiments of the present invention, the air conditioning power supply system provided, the outdoor unit also includes a second power supply module, the second power supply module includes a second DC end, a second capacitor and a second Zener diode, the second DC end is connected to one end of the second capacitor, the anode of the second Zener diode and the communication line, and the other end of the second capacitor and the cathode of the second Zener diode are connected to the outdoor unit communication module.

[0027] According to some embodiments of the present invention, the air conditioning power supply system provided, the outdoor unit further includes a DC power supply module, the input end of the DC power supply module is connected to the first power terminal, and the output end is connected to the second DC terminal.

[0028] In a second aspect, an embodiment of the present invention provides an air conditioner, comprising the air conditioner power supply system as described in the embodiment of the first aspect above.

[0029] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation to the technical solution of the present invention.

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0032] Figure 1 This is a functional block diagram of an air-conditioning power supply system provided by an embodiment of the present invention;

[0033] Figure 2 This is a circuit diagram of an air-conditioning power supply system provided in Embodiment 1 of the present invention;

[0034] Figure 3 This is a circuit diagram of an air-conditioning power supply system provided by Embodiment 2 of the present invention;

[0035] Figure 4 is a functional block diagram of an air-conditioning power supply system provided by another embodiment of the present invention;

[0036] Figure 5 This is a circuit diagram of an air-conditioning power supply system provided by Embodiment 3 of the present invention;

[0037] Figure 6 This is a timing diagram of the air-conditioning power supply system provided in the first embodiment of the present invention. DETAILED DESCRIPTION

[0038] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0039] In the description of the embodiments of the present invention, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, and "above," "below," and "within" are understood to include the number itself. "At least one" means one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. If the terms "first," "second," etc. are used in the description, they are only used to distinguish technical features and are not to be understood as indicating or implying relative importance, implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] It should be noted that the terms "dispose," "install," and "connect" in the embodiments of the present invention should be interpreted broadly. Those skilled in the art can reasonably determine the specific meanings of these terms in the embodiments of the present invention based on the specific content of the technical solution. For example, the term "connect" can refer to mechanical connection, electrical connection, or communication; it can be direct connection or indirect connection through an intermediary.

[0041] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Currently, split-type air conditioners typically use the following power supply method: Mains power is connected to the indoor unit, then supplied to the outdoor unit via a relay within the indoor unit. The indoor unit then controls the outdoor unit's power supply by turning the relay's contacts on and off. This power supply method has several drawbacks: the indoor unit's electrical control panel must pass all the current from the outdoor unit, posing a risk of overheating at the wiring terminals; the indoor unit requires a high-current relay to control the outdoor unit's power supply, which is costly; the power supply wiring between the indoor and outdoor units requires thickened copper wire to power the entire system, which is also costly; and the numerous connecting wires complicate installation and can easily lead to errors.

[0043] Based on this, an embodiment of the present invention provides an air conditioning power supply system and an air conditioner, which can reduce the copper usage and cost of the power supply line group, reduce the heating risk of the terminal blocks, reduce the size of the electronic control and reduce the cost of the electronic control.

[0044] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0045] Figure 1 This is a block diagram of the principle of the air conditioning power supply system provided by the embodiment of the present invention. Figure 1The first embodiment of the present invention provides an air-conditioning power supply system, comprising an indoor unit 100, an outdoor unit 200, a power line group and a communication line group connected between the indoor unit 100 and the outdoor unit 200, wherein the power line group comprises a first power line 310 and a second power line 320, and the communication line group comprises the second power line 320 and a communication line 330, that is, the second power line 320 is reused in the power line group and the communication line group. It is understandable that, referring to Figure 1 If necessary, the air conditioning power supply system may further include a ground wire 340 connected between the indoor unit 100 and the outdoor unit 200 .

[0046] Specifically, refer to Figure 2 The indoor unit 100 includes an indoor unit communication module 120; the outdoor unit 200 includes a first switch module 220, an outdoor unit communication module 240 and a power-on control module 250. The indoor unit communication module 120 and the outdoor unit communication module 240 establish a current loop communication via a communication line group. The first switch module 220 is used to control whether the outdoor unit 200 is powered on. The power-on control module 250 is connected to the outdoor unit communication module 240 and the first switch module 220 respectively.

[0047] in:

[0048] When the indoor unit receives the power-on command, it controls the indoor unit communication module to conduct the current loop between the indoor unit 100 and the outdoor unit 200, so that the power-on control module 250 controls the first switch module 220 to conduct.

[0049] According to the air-conditioning power supply system provided by the embodiment of the present invention, a first switch module 220 is provided in the outdoor unit 200 to control whether the outdoor unit 200 is powered on and working. After receiving the power-on command, the indoor unit 100 can control the indoor unit communication module 120 to conduct the current loop between the indoor unit 100 and the outdoor unit 200, thereby providing an excitation signal to the power-on control module 250 through the current loop, thereby triggering the power-on control module 250 to control the first switch module 220 to conduct, so that the outdoor unit 200 is powered on and working; the indoor unit 100 realizes the power-on control of the outdoor unit 200 in this way, so that The indoor unit 100 does not need to pass the current through the outdoor unit 200, and the power supply line group between the indoor unit 100 and the outdoor unit 200 no longer needs to use thick copper wire, which reduces the copper usage and cost of the power supply line group, and can also reduce the heating potential, volume and cost of the wiring terminals of the indoor unit 100; the indoor unit 100 also does not need to be equipped with a relay to control the power supply of the outdoor unit 200, which can save the space occupied by the electronic control of the indoor unit 100 and reduce the electronic control cost of the indoor unit 100. In addition, the current and power passing through the indoor unit 100 are reduced, and the EMI interference of the indoor unit 100 is also reduced, making it easier to pass the EMC test.

[0050] Reference Figure 2In the air-conditioning power supply system provided in some embodiments of the present invention, the outdoor unit 200 further includes an external load 230 and a first power terminal 210 for accessing an external AC power supply. The external load 230 obtains power from the first power terminal 210 through the first switch module 220.

[0051] In this embodiment, the mains power is directly connected to the first power terminal 210 of the outdoor unit 200 as an external AC power source, and supplies power to the outdoor load 230 through the first switch module 220. Therefore, after the first switch module 220 is turned on, the outdoor load 230 is powered and the outdoor unit 200 is powered and operates.

[0052] Reference Figure 2 In the air-conditioning power supply system provided in some embodiments of the present invention, the indoor unit 100 also includes an indoor load 110, and the air-conditioning power supply system also includes a power supply line group connected between the indoor unit 100 and the outdoor unit 200; wherein: in the indoor unit 100, the power supply line group is connected to the indoor load 110; in the outdoor unit 200, the power supply line group is connected to the first power terminal 210.

[0053] In this embodiment, after the external AC power supply is connected to the first power terminal 210 of the outdoor unit 200, on the one hand, power is supplied to the indoor unit 100 through the first power supply line 310 and the second power supply line 320, that is, the indoor unit 100 directly obtains power from the first power terminal 210, and on the other hand, power is supplied to the outdoor unit load 230 through the first switch module 220, so that the indoor unit 100 does not need to pass the current of the outdoor unit 200. The first power supply line 310 and the second power supply line 320 as the power supply line group between the indoor unit 100 and the outdoor unit 200 no longer need to use thick copper wire, which reduces the copper usage and cost of the power supply line group, and can reduce the heating risk, volume and cost of the wiring terminal of the indoor unit 100; the internal load 110 of the indoor unit 100 can be directly powered after the external AC power supply is connected, waiting for the user to send a power-on instruction When the indoor unit 100 receives the power-on command, it controls the indoor unit communication module 120 to be turned on, thereby forming a current loop between the indoor unit 100 and the outdoor unit 200, and then controls the first switch module 220 to be turned on through the power-on control module 250 in the outdoor unit 200, and the outdoor unit load 230 of the outdoor unit 200 is powered and works. The indoor unit 100 does not need to set a relay to control the power supply of the outdoor unit 200, which can save the space occupied by the electric control of the indoor unit 100 and reduce the electric control cost of the indoor unit 100. In addition, the current and power of the indoor unit 100 are reduced, the EMI interference of the indoor unit 100 is also reduced, and the EMC test is easier to pass. The air-conditioning power supply system has fewer connections between the indoor unit 100 and the outdoor unit 100, which reduces the number of terminals that need to be configured, simplifies installation, and improves installation reliability.

[0054] Reference Figure 2In some embodiments of the present invention, the air conditioning power supply system provided by the first switch module 220 includes a first relay RY1 and a thermistor PTC1, the first power terminal 210 includes a first terminal Lin corresponding to the first power line 310 and a second terminal Nin corresponding to the second power line 320, the first terminal Lin, the contact of the first relay RY1, the thermistor PTC1 and the external load 230 are connected in sequence, and the two ends of the coil of the first relay RY1 are connected to the second terminal Nin and the power-on control module 250.

[0055] In this embodiment, when the power-on control module 250 energizes the coil of the first relay RY1 in the first switch module 220, the contacts of the first relay RY1 close, causing the first terminal Lin to supply a small current to the outdoor load 230 via the thermistor PTC1 for startup, and the outdoor unit 200 is powered and begins operation. It should be noted that the second terminal Nin is also connected to the outdoor load 230, forming a complete power supply circuit: the first terminal Lin - the contacts of the first relay RY1 - the thermistor PTC1 - the outdoor load 230 - the second terminal Nin.

[0056] Reference Figure 2 In some embodiments of the air conditioning power supply system provided by the present invention, the outdoor unit 200 further includes a microcontroller module 260, and the first switch module 220 further includes a second relay RY2. The contacts of the second relay RY2 are respectively connected to the first terminal Lin and the outdoor load 230. The microcontroller module 260 is connected to the coil of the second relay RY2 and is configured to control the second relay RY2 to conduct after the conduction duration of the first relay RY1 reaches a preset duration. Specifically, the outdoor unit 200 further includes a +12V DC power supply terminal. The +12V DC power supply terminal, the coil of the second relay RY2, and the first IO port Con1-MCU of the microcontroller module 260 are sequentially connected. The microcontroller module 260 can control whether the coil of the second relay RY2 is energized via the first IO port Con1-MCU.

[0057] In this embodiment, after the conduction time of the first relay RY1 reaches a preset time, the external load 230 is started. At this time, the second relay RY2 is configured, and the coil of the second relay RY2 is energized through the micro-control module 260, so that the contacts of the second relay RY2 are closed, thereby directly connecting the first terminal Lin with the external load 230, that is, the two ends of the thermistor PTC1 are short-circuited through the contacts of the second relay RY2, and the first terminal Lin no longer needs to supply power to the external load 230 through the thermistor PTC1.

[0058] Reference Figure 2In some embodiments of the present invention, the air conditioner power supply system includes a power-on control module 250 including a first resistor R1, a second resistor R2, a first diode D1, and a first transistor Q1. The second terminal Nin, the first resistor R1, the second resistor R2, and the communication line 330 are sequentially connected. The connection point between the first resistor R1 and the second resistor R2 is connected to the anode of the first diode D1. The cathode of the first diode D1 is connected to the control pin of the first transistor Q1. The two switch pins of the first transistor Q1 are respectively connected to the coil of the first relay RY1 and the communication line 330.

[0059] In this embodiment, the current on the current loop formed between the indoor unit 100 and the outdoor unit 200 flows into the control pin of the first transistor Q1 through the first resistor R1 and the first diode D1, causing the first transistor Q1 to be turned on, thereby forming a conduction loop of the second terminal Nin-the coil of the first relay RY1-the first diode D1-the communication line 330, so that the coil of the first relay RY1 is energized and the contacts of the first relay RY1 are closed, thereby realizing that the power-on control module 250 controls the first switch module 220 to be turned on after the current loop is formed between the indoor unit 100 and the outdoor unit 200.

[0060] In addition, refer to Figure 2 In some embodiments, the power-on control module 250 further includes a third voltage regulator diode DZ3 connected in parallel with the second resistor R2.

[0061] Reference Figure 2 In some embodiments of the air conditioning power supply system provided by the present invention, the outdoor unit 200 further includes a first optocoupler IC1, the microcontroller module 260 is connected to the light emitter of the first optocoupler IC1, and the light receiver of the first optocoupler IC1 is connected to both ends of the second resistor R2. Specifically, the outdoor unit 200 further includes a +5V DC power supply terminal and a third resistor R3. The +5V DC power supply terminal, the light emitter of the first optocoupler IC1, the third resistor R3, and the second IO port Con2-MCU of the microcontroller module 260 are sequentially connected.

[0062] In this embodiment, the micro-control module 260 can control whether the first optocoupler IC1 is turned on through the second IO port Con2-MCU.

[0063] Reference Figure 2 In the air-conditioning power supply system provided by some embodiments of the present invention, after controlling the second relay RY2 to be turned on, the micro-control module 260 controls the first optocoupler IC1 to be turned on, so that the first transistor Q1 is turned off, and the first relay RY1 is turned off.

[0064] In this embodiment, when the second relay RY2 is turned on, the first terminal Lin directly supplies power to the external load 230 through the contacts of the second relay RY2, without the need to supply power through the contacts of the first relay RY1 and the thermistor PTC1. At this time, the micro-control module 260 controls the first optocoupler IC1 to turn on, and the light receiver of the first optocoupler IC1 short-circuits the two ends of the second resistor R2. The current flowing from the second terminal Nin through the first resistor R1 no longer flows through the first diode D1 to the control pin of the first transistor Q1, but flows through the light receiver of the first optocoupler IC1 to the communication line 330, causing the first transistor Q1 to be turned off, the coil of the first relay RY1 is no longer energized, and the contacts of the first relay RY1 are also switched to off.

[0065] Reference Figure 2 In some embodiments of the present invention, the air conditioning power supply system provided by the indoor unit 100 further includes a first power supply module 130. The first power supply module 130 includes a first DC terminal VCC1, a first capacitor C1, and a first voltage regulator diode DZ1. The first DC terminal VCC1 is connected to one end of the first capacitor C1, the anode of the first voltage regulator diode DZ1, and the second power supply line 320. The other end of the first capacitor C1 and the cathode of the first voltage regulator diode DZ1 are connected to the indoor unit communication module 120. Specifically, the first power supply module 130 may further include a third capacitor C3 connected in parallel with the first capacitor C1.

[0066] In this embodiment, after the indoor unit 100 controls the indoor unit communication module 120 to be turned on to form a current loop between the indoor unit 100 and the outdoor unit 200, the first power supply module 130 in the indoor unit 100 provides voltage for the current loop, for example Figure 2 As shown, the first DC terminal VCC1 is a +24V DC power supply terminal, so that a 24V voltage is formed between the second power supply line 320 and the communication line 330 in the outdoor unit 200, thereby triggering the first transistor Q1 in the power-on control module 250 to turn on.

[0067] Continue to refer to Figure 2The indoor unit communication module 120 includes a current loop signal receiving terminal S-RXD, a +5V DC power supply terminal, a fourth resistor R4, a fifth resistor R5, a second optocoupler IC2, a sixth resistor R6, a second diode D2, an eighth resistor R8, a ninth resistor R9, a third optocoupler IC3, a current loop signal transmitting terminal S-TXD, a tenth resistor R10, an eleventh resistor R11, and a second transistor Q2. The indoor unit 100 also includes a seventh resistor R7 and a third diode D3. The communication line 330 is connected to the anode of the third diode D3, the cathode of the third diode D3 is connected to one end of the seventh resistor R7, and the other end of the seventh resistor R7 is connected to the cathode of the second diode D2, one end of the sixth resistor R6, and the anode of the light emitter of the second optocoupler IC2; the current loop signal receiving terminal S-RXD is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and one end of the light receiver of the second optocoupler IC2. The V DC power supply terminal is connected to the other end of the light receiver of the second optocoupler IC2, and the other end of the fifth resistor R5 is grounded; the +5V DC power supply terminal is also connected to one end of the eighth resistor R8, the other end of the eighth resistor R8 is connected to one end of the ninth resistor R9 and the anode of the light receiver of the third optocoupler IC3, the other end of the ninth resistor R9 is connected to the cathode of the light receiver of the third optocoupler IC3 and a switch pin of the second transistor Q2, the current loop signal sending terminal S-TXD is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to the control pin of the second transistor Q2 and one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is connected to the other switch pin of the second transistor Q2; the cathode of the light receiver of the second optocoupler IC2 and the other end of the sixth resistor R6 are connected to one end of the light receiver of the third optocoupler IC3, and the other end of the light receiver of the third optocoupler IC3 is connected to the cathode of the second diode D2 and the first power supply module 130. Specifically, the other end of the light receiver of the third optocoupler IC3, the cathode of the second diode D2, the other end of the first capacitor C1, and the cathode of the first voltage-stabilizing tube DZ1 are connected together.

[0068] Continue to refer to Figure 2The outdoor unit communication module 240 includes a current loop signal receiving terminal RXD, a +5V DC power supply terminal, a twelfth resistor R12, a thirteenth resistor R13, a fourth optical coupler IC4, a fourteenth resistor R14, a fourth diode D4, a fifteenth resistor R15, a sixteenth resistor R16, a fifth optical coupler IC5, a current loop signal transmitting terminal TXD, a seventeenth resistor R17, an eighteenth resistor R18, and a third transistor Q3; the outdoor unit 200 also includes a nineteenth resistor R19 and a fifth diode D5; the second power supply line 3 20 is connected to the cathode of the fourth diode D4, one end of the fourteenth resistor R14 and the anode of the light emitter of the fourth optocoupler IC4, the +5V DC power supply end is connected to one end of the light receiver of the fourth optocoupler IC4, the current loop signal receiving end RXD is connected to one end of the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to one end of the thirteenth resistor R13 and the other end of the light receiver of the fourth optocoupler IC4, and the other end of the thirteenth resistor R13 is grounded; the cathode of the light emitter of the fourth optocoupler IC4 is connected to the fourteenth resistor R1 4 and one end of the light receiver of the fifth optocoupler IC5; the +5V DC power supply end is connected to one end of the fifteenth resistor R15, the other end of the fifteenth resistor R15 is connected to one end of the sixteenth resistor R16 and the anode of the light emitter of the fifth optocoupler IC5, the cathode of the light emitter of the fifth optocoupler IC5 is connected to the other end of the sixteenth resistor R16 and a switch pin of the third transistor Q3, the current loop signal transmitting end TXD is connected to one end of the seventeenth resistor R17, the other end of the seventeenth resistor R17 is connected to the control pin of the third transistor Q3 and one end of the eighteenth resistor R18, the other end of the eighteenth resistor R18 and the other switch pin of the third transistor Q3 are grounded; the other end of the light receiver of the fifth optocoupler IC5 is connected to the anode of the fourth diode D4, a switch pin of the first transistor Q1, the cathode of the third voltage regulator DZ3, one end of the second resistor R2 and one end of the nineteenth resistor R19, the other end of the nineteenth resistor R19 is connected to the anode of the fifth diode D5, and the cathode of the fifth diode D5 is connected to the communication line 330.

[0069] Figure 6 yes Figure 2 The timing diagram of the air-conditioning power supply system provided by the embodiment shown. Figure 6 , the working process of the air-conditioning power supply system provided by the embodiment of the present invention is specifically described:

[0070] At time T1: the indoor unit 100 receives the power-on command, and the indoor unit controller in the indoor unit 100 outputs a high-level S-TXD signal, triggering the second optocoupler IC2 to turn on, energizing the current loop between the indoor unit 100 and the outdoor unit 200. The control pin of the first transistor Q1 is energized and turned on through the first resistor R1, thereby energizing and turning on the first relay RY1.

[0071] At time T2: the energy storage capacitor in the external load 230 is charged through the first relay RY1 and the thermistor PTC1;

[0072] At time T3: the microcontroller 260 in the outdoor unit load 230 is powered and initialized, and detects that the energy storage capacitor in the outdoor unit load 230 is fully charged. The microcontroller 260 outputs a control signal through the first IO port Con1-MCU to turn on the second relay RY2, short-circuiting the thermistor PTC1 to complete normal power supply to the outdoor unit 200.

[0073] At time T4 (after the second relay RY2 is turned on, which generally takes more than 50ms), the microcontroller module 260 outputs a control signal through the second IO port Con2-MCU, triggering the first optocoupler IC1 to turn on, so that the power supply circuit of the first transistor Q1 is short-circuited, the first transistor Q1 is turned off, and the first relay RY1 is de-energized and turned off;

[0074] At time T5: after the first relay RY1 is disconnected, the outdoor unit 200 sends a preparation completion signal to the indoor unit 100, notifying the indoor unit 100 that it can operate and communicate normally. The indoor unit 100 sends data to the outdoor unit 200 via the S-TXD signal.

[0075] Reference Figure 3 In some embodiments of the present invention, the air conditioning power supply system provided by the outdoor unit 200 further includes a second power supply module 270. The second power supply module 270 includes a second DC terminal VCC2, a second capacitor C2, and a second voltage regulator diode DZ2. The second DC terminal VCC2 is connected to one end of the second capacitor C2, the anode of the second voltage regulator diode DZ2, and the communication line 330. The other end of the second capacitor C2 and the cathode of the second voltage regulator diode DZ2 are connected to the outdoor unit communication module 240. Specifically, the second power supply module 270 may further include a fourth capacitor C4 connected in parallel with the second capacitor C2.

[0076] In this embodiment, after the indoor unit 100 controls the indoor unit communication module 120 to be turned on to form a current loop between the indoor unit 100 and the outdoor unit 200, the second power supply module 270 in the outdoor unit 200 provides voltage for the current loop, for example Figure 3 As shown, the second DC terminal VCC2 is a +24V DC power supply terminal, so that a 24V voltage is formed between the second power supply line 320 and the communication line 330 in the outdoor unit 200, thereby triggering the first transistor Q1 in the power-on control module 250 to turn on.

[0077] Continue to refer to Figure 3The indoor unit communication module 120 includes a current loop signal receiving terminal S-RXD, a +5V DC power supply terminal, a fourth resistor R4, a fifth resistor R5, a second optocoupler IC2, a sixth resistor R6, a second diode D2, an eighth resistor R8, a ninth resistor R9, a third optocoupler IC3, a current loop signal transmitting terminal S-TXD, a tenth resistor R10, an eleventh resistor R11, and a second transistor Q2. The indoor unit 100 also includes a seventh resistor R7 and a third diode D3. The communication line 330 is connected to the anode of the third diode D3, the cathode of the third diode D3 is connected to one end of the seventh resistor R7, and the other end of the seventh resistor R7 is connected to the cathode of the second diode D2, one end of the sixth resistor R6, and the anode of the light emitter of the second optocoupler IC2; the current loop signal receiving terminal S-RXD is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and one end of the light receiver of the second optocoupler IC2. The +5V DC power supply end is connected to the other end of the light receiver of the second optocoupler IC2, and the other end of the fifth resistor R5 is grounded; the +5V DC power supply end is also connected to one end of the eighth resistor R8, the other end of the eighth resistor R8 is connected to one end of the ninth resistor R9 and the anode of the light receiver of the third optocoupler IC3, the other end of the ninth resistor R9 is connected to the cathode of the light receiver of the third optocoupler IC3 and a switch pin of the second transistor Q2, the current loop signal sending end S-TXD is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to the control pin of the second transistor Q2 and one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is connected to the other switch pin of the second transistor Q2; the cathode of the light receiver of the second optocoupler IC2 and the other end of the sixth resistor R6 are connected to one end of the light receiver of the third optocoupler IC3, and the other end of the light receiver of the third optocoupler IC3 is connected to the cathode of the second diode D2 and the communication line 330.

[0078] Continue to refer to Figure 3The outdoor unit communication module 240 includes a current loop signal receiving terminal RXD, a +5V DC power supply terminal, a twelfth resistor R12, a thirteenth resistor R13, a fourth optocoupler IC4, a fourteenth resistor R14, a fourth diode D4, a fifteenth resistor R15, a sixteenth resistor R16, a fifth optocoupler IC5, a current loop signal transmitting terminal TXD, a seventeenth resistor R17, an eighteenth resistor R18, and a third transistor Q3; the outdoor unit 200 also includes a nineteenth resistor R19 and a fifth diode D5; the second power supply line 320 is connected to the cathode of the fourth diode D4, one end of the fourteenth resistor R14 and the anode of the light emitter of the fourth optocoupler IC4, the +5V DC power supply terminal is connected to one end of the light receiver of the fourth optocoupler IC4, the current loop signal receiving terminal RXD is connected to one end of the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to one end of the thirteenth resistor R13 and the other end of the light receiver of the fourth optocoupler IC4, and the other end of the thirteenth resistor R13 is grounded; The cathode of the light emitter of the fourth optocoupler IC4 is connected to the other end of the fourteenth resistor R14 and one end of the light receiver of the fifth optocoupler IC5; the +5V DC power supply end is connected to one end of the fifteenth resistor R15, the other end of the fifteenth resistor R15 is connected to one end of the sixteenth resistor R16 and the anode of the light emitter of the fifth optocoupler IC5, the cathode of the light emitter of the fifth optocoupler IC5 is connected to the other end of the sixteenth resistor R16 and a switch pin of the third transistor Q3, the current loop signal sending end TXD is connected to one end of the seventeenth resistor R17, the other end of the seventeenth resistor R17 is connected to the control pin of the third transistor Q3 and one end of the eighteenth resistor R18, the other end of the eighteenth resistor R18 and the other switch pin of the third transistor Q3 are grounded; the other end of the light receiver of the fifth optocoupler IC5 is connected to the anode of the fourth diode D4, a switch pin of the first transistor Q1, the cathode of the third voltage regulator DZ3, one end of the second resistor R2 and the second power supply module 270. Specifically, the other end of the light receiver of the fifth optocoupler IC5, the anode of the fourth diode D4, a switch pin of the first transistor Q1, the cathode of the third voltage-stabilizing diode DZ3, one end of the second resistor R2, the other end of the second capacitor C2, the other end of the fourth capacitor C4, and the cathode of the second voltage-stabilizing diode DZ2 are connected together, the second DC end VCC2, one end of the second capacitor C2, one end of the fourth capacitor C4, the anode of the second voltage-stabilizing diode DZ2, and one end of the nineteenth resistor R19 are connected together, the other end of the nineteenth resistor R19 is connected to the anode of the fifth diode D5, and the cathode of the fifth diode D5 is connected to the communication line 330.

[0079] In the air-conditioning power supply system provided in some embodiments of the present invention, the outdoor unit 200 further includes a DC power module, the input end of the DC power module is connected to the first power terminal 210, and the output end is connected to the second DC terminal VCC2.

[0080] In this embodiment, before the external load 230 is powered, the first power terminal 210 supplies power to the DC power module, and the output end of the DC power module provides DC power to the second DC terminal VCC2, thereby providing voltage for the current loop.

[0081] Figure 4 is a principle block diagram of an air-conditioning power supply system provided by another embodiment of the present invention. Figure 5 This is a circuit diagram of an air conditioning power supply system provided by another embodiment. Figure 4 and Figure 5 In some embodiments of the present invention, the air conditioning power supply system includes an indoor unit 100 including an indoor load 110, an indoor communication module 120, and a second power terminal 140 for connecting to an external AC power source; the outdoor unit 200 includes a first switch module 220, an outdoor load 230, an outdoor communication module 240, and a power-on control module 250; the air conditioning power supply system further includes a power supply line group connected between the indoor unit 100 and the outdoor unit 200; the indoor communication module 120 and the outdoor communication module 240 establish current loop communication via the communication line group; the first switch module 220 is used to control whether the outdoor unit 200 is powered on; and the power-on control module 250 is connected to the outdoor communication module 240 and the first switch module 220, respectively.

[0082] In the indoor unit 100 , the second power terminal 140 connects the indoor load 110 and the power line group; in the outdoor unit 200 , the outdoor load 230 obtains power from the power line group through the first switch module 220 .

[0083] It is understandable that Figure 5 The embodiment shown is Figure 2 Compared with the embodiment shown in FIG, the difference is that the AC power as the external AC power source is directly connected to the second power terminal 140 in the indoor unit 100, rather than the first power terminal 210 in the outdoor unit 200. It should also be noted that in Figure 2 In the embodiment shown, after the AC power as an external power source is connected to the first power terminal 210 in the outdoor unit 200, the first power line 310 and the second power line 320 in the power line group are used to supply power from the first power terminal 210 in the outdoor unit 200 to the indoor unit 100 and directly supply the indoor unit load 110; Figure 5 In the embodiment shown, the AC power as an external AC power source is directly connected to the second power terminal 140 in the indoor unit 100 and directly supplies the indoor unit load 110. The first power supply line 310 and the second power supply line 320 in the power supply line group are used to supply power from the second power terminal 140 in the indoor unit 100 to the outdoor unit 200, and then supply the outdoor unit load 230 through the first switch module 220.

[0084] In addition, a second embodiment of the present invention provides an air conditioner, comprising the air conditioner power supply system of the first embodiment as described above.

[0085] According to the air conditioner provided by the embodiment of the present invention, a first switch module 220 is provided in the outdoor unit 200 to control whether the outdoor unit 200 is powered on and working. After receiving the power-on instruction, the indoor unit 100 can control the indoor unit communication module 120 to conduct the current loop between the indoor unit 100 and the outdoor unit 200, thereby providing an excitation signal to the power-on control module 250 through the current loop, thereby triggering the power-on control module 250 to control the first switch module 220 to conduct, so that the outdoor unit 200 is powered on and working; the indoor unit 100 realizes the power-on control of the outdoor unit 200 in this way, so that the indoor unit 100 can realize the power-on control of the outdoor unit 200. The indoor unit 100 does not need to pass the current of the outdoor unit 200, and the power supply line group between the indoor unit 100 and the outdoor unit 200 no longer needs to use thick copper wire, which reduces the copper usage and cost of the power supply line group, and can reduce the heating potential, volume and cost of the wiring terminals of the indoor unit 100; the indoor unit 100 also does not need to be equipped with a relay to control the power supply of the outdoor unit 200, which can save the space occupied by the electronic control of the indoor unit 100 and reduce the electronic control cost of the indoor unit 100. In addition, the current and power passing through the indoor unit 100 are reduced, and the EMI interference of the indoor unit 100 is also reduced, making it easier to pass the EMC test.

[0086] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. An air conditioning power supply system, characterized in that: Including indoor and outdoor units; The indoor unit includes an indoor unit communication module; The outdoor unit includes a first switch module, an outdoor unit communication module and a power-on control module. The indoor unit communication module establishes a current loop communication with the outdoor unit communication module through a communication line group. The first switch module is used to control whether the outdoor unit is powered on, and the power-on control module is respectively connected to the outdoor unit communication module and the first switch module; the first switch module includes a first relay; the power-on control module includes a first resistor, a second resistor, a first diode and a first transistor; the communication line group includes a second power supply line and a communication line; the second power supply line, the first resistor, the second resistor and the communication line are connected in sequence; the connection point of the first resistor and the second resistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the control pin of the first transistor; the second power supply line is also connected to one end of the coil of the first relay, and the two switch pins of the first transistor are respectively connected to the other end of the coil of the first relay and the communication line; in: When the indoor unit receives a power-on instruction, the indoor unit communication module is controlled to conduct the current loop between the indoor unit and the outdoor unit, so that the first transistor in the power-on control module is turned on, thereby controlling the first relay in the first switch module to be turned on.

2. The air conditioning power supply system according to claim 1, characterized in that: The outdoor unit further includes an external load and a first power terminal for accessing an external AC power supply. The external load obtains power from the first power terminal through the first switch module.

3. The air conditioning power supply system according to claim 2, characterized in that: The indoor unit further includes an indoor load, and the air-conditioning power supply system further includes a power supply line group connected between the indoor unit and the outdoor unit; in: In the indoor unit, the power supply line group is connected to the indoor load; In the outdoor unit, the power supply line group is connected to the first power terminal.

4. The air conditioning power supply system according to claim 1, characterized in that: The indoor unit further includes an indoor load and a second power supply terminal for connecting to an external AC power supply; the outdoor unit further includes an external load; the air conditioning power supply system further includes a power supply line group connected between the indoor unit and the outdoor unit; in: In the indoor unit, the second power terminal is connected to the indoor load and the power supply line group; In the outdoor unit, the outdoor load obtains power from the power supply line group through the first switch module.

5. The air-conditioning power supply system according to claim 3, characterized in that: The first switch module also includes a thermistor, the power supply line group includes a first power supply line and a second power supply line, the first power terminal includes a first terminal corresponding to the first power supply line and a second terminal corresponding to the second power supply line, the first terminal, the contact of the first relay, the thermistor and the external load are connected in sequence, and the two ends of the coil of the first relay are connected to the second terminal and a switch pin of the first transistor.

6. The air-conditioning power supply system according to claim 5, characterized in that: The outdoor unit also includes a microcontrol module, and the first switch module also includes a second relay, the contacts of which are respectively connected to the first terminal and the outdoor unit load; the microcontrol module is connected to the coil of the second relay, and is used to control the second relay to be turned on after the conduction time of the first relay reaches a preset time.

7. The air-conditioning power supply system according to claim 6, characterized in that: The outdoor unit further includes a first optocoupler, the microcontroller module is connected to the light emitter of the first optocoupler, and the light receiver of the first optocoupler is connected to both ends of the second resistor.

8. The air-conditioning power supply system according to claim 7, characterized in that: After controlling the second relay to be turned on, the microcontroller controls the first optical coupler to be turned on, so as to turn off the first transistor and thus turn off the first relay.

9. The air-conditioning power supply system according to claim 5, characterized in that: The indoor unit also includes a first power supply module, which includes a first DC end, a first capacitor and a first voltage regulator tube. The first DC end is connected to one end of the first capacitor, the anode of the first voltage regulator tube and the second power supply line, and the other end of the first capacitor and the cathode of the first voltage regulator tube are connected to the indoor unit communication module.

10. The air-conditioning power supply system according to claim 6, characterized in that: The outdoor unit also includes a second power supply module, which includes a second DC end, a second capacitor and a second voltage-stabilizing diode. The second DC end is connected to one end of the second capacitor, the anode of the second voltage-stabilizing diode and the communication line, and the other end of the second capacitor and the cathode of the second voltage-stabilizing diode are connected to the outdoor unit communication module.

11. The air-conditioning power supply system according to claim 10, characterized in that: The outdoor unit further includes a DC power supply module, wherein an input end of the DC power supply module is connected to the first power terminal, and an output end of the DC power supply module is connected to the second DC terminal.

12. An air conditioner, characterized in that: An air-conditioning power supply system comprising any one of claims 1 to 11.

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