Power supply communication system of air conditioner and air conditioner

Abstract

The invention discloses a power supply communication system of an air conditioner and the air conditioner, and relates to the technical field of power supply circuits, and the power supply communication system comprises power supply equipment, power receiving equipment and a transmission cable connecting the power supply equipment and the power receiving equipment; the power supply device comprises a first control unit, a first switch unit used for supplying power to the transmission cable and a first sampling unit used for obtaining voltage signals from the transmission cable. The first control unit is connected with the first switch unit and the first sampling unit. The power receiving device comprises a second control unit, a second switch unit used for supplying power to the transmission cable, a third switch unit used for obtaining electric energy from the transmission cable and a second sampling unit used for obtaining voltage signals from the transmission cable. The second control unit is connected with the second switch unit, the third switch unit and the second sampling unit. Communication signals are coupled in power transmission, an independent signal transmission cable is omitted, the cost is reduced, the possibility of faults of an independent communication line is avoided, and the reliability of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply circuits, and particularly to a power supply and communication system for an air conditioner and an air conditioner. Background Art

[0002] In an air conditioning system, it is common for one device to supply power to another device, and for the two devices to communicate and exchange information with each other. Currently, the power supply and communication are usually carried out independently. The power supply uses a separate power supply line, and the communication also designs an independent communication line. The design is relatively simple, but it increases additional cables, the connection is complex, the cost is high, and because of the independent cables, there is a probability of cable damage, which will cause additional failures and reduce the product reliability. Summary of the Invention

[0003] An object of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a power supply and communication system for an air conditioner and an air conditioner, which can improve the reliability of the system.

[0004] In a first aspect, an embodiment of the present invention provides a power supply and communication system for an air conditioner, including a power supply device, a power receiving device, and a transmission cable connecting the power supply device and the power receiving device; The power supply device includes a first control unit, a first switch unit for supplying power to the transmission cable, and a first sampling unit for obtaining a voltage signal from the transmission cable. The first control unit is respectively connected to the first switch unit and the first sampling unit; The power receiving device includes a second control unit, a second switch unit for supplying power to the transmission cable, a third switch unit for obtaining electric energy from the transmission cable, and a second sampling unit for obtaining a voltage signal from the transmission cable. The second control unit is respectively connected to the second switch unit, the third switch unit, and the second sampling unit.

[0005] The power supply and communication system of an air conditioner provided according to some embodiments of the present invention has at least the following beneficial effects: The power supply device can control the first switch unit to conduct through the first control unit, so as to supply power to the transmission cable. The power receiving device obtains electric energy from the transmission cable through the third switch unit, realizing power supply from the power supply device to the power receiving device; The power supply device can also control the first switch unit to alternately conduct and turn off through the first control unit, providing a pulse voltage signal to the transmission cable, which is equivalent to coupling the communication signal in the power supply while supplying power to the transmission cable; The power receiving device can obtain a voltage signal from the transmission cable through the second sampling unit to parse out the instruction sent by the power supply device and transmit it to the second control unit; The power receiving device can also control the second switch unit to alternately conduct and turn off through the second control unit, providing a response voltage signal to the transmission cable to realize communication with the power supply device; In this power supply and communication system, the communication signal is coupled in the power transmission, eliminating the need for an independent signal transmission cable, which not only reduces costs but also avoids the possibility of failure of a separate communication line, improving the reliability of the system.

[0006] In the power supply and communication system provided according to some embodiments of the present invention, the power supply device further includes a first power supply terminal. The first switch unit includes a first one-way conduction tube and a first switch tube connected between the first power supply terminal and the transmission cable, and the first one-way conduction tube is reversely connected in parallel with the first switch tube.

[0007] In the power supply and communication system provided according to some embodiments of the present invention, the power supply device further includes a first power supply terminal. The first switch unit includes a first switch tube and a first one-way conduction tube, and the first power supply terminal, the first switch tube, the first one-way conduction tube and the transmission cable are connected in series.

[0008] In the power supply and communication system provided according to some embodiments of the present invention, the power supply device further includes a first driving unit disposed between the control pin of the first control unit and the first switch tube.

[0009] In the power supply and communication system provided according to some embodiments of the present invention, the first driving unit includes a first resistor, a second resistor, a third resistor and a second switch tube. The first power supply terminal, the first resistor, the second resistor, the second switch tube and the ground terminal are connected in sequence. The third resistor is connected between the first control unit and the control pin of the second switch tube, and the connection point of the first resistor and the second resistor is connected to the control pin of the first switch tube.

[0010] According to the power supply and communication system provided by some embodiments of the present invention, the power receiving device further includes a second power supply terminal. The second switch unit includes a third switching tube connected between the second power supply terminal and the transmission cable. The third switch unit includes a second unidirectional conduction tube, and the second unidirectional conduction tube is reversely connected in parallel with the third switching tube.

[0011] According to the power supply and communication system provided by some embodiments of the present invention, the power supply device further includes a second driving unit disposed between the second control unit and the control pin of the third switching tube.

[0012] According to the power supply and communication system provided by some embodiments of the present invention, the second driving unit includes a fourth resistor, a fifth resistor, a sixth resistor, and a fourth switching tube. The second power supply terminal, the fourth resistor, the fifth resistor, the fourth switching tube, and the ground terminal are connected in sequence. The sixth resistor is connected between the second control unit and the control pin of the fourth switching tube, and the connection point of the fourth resistor and the fifth resistor is connected to the control pin of the third switching tube.

[0013] According to the power supply and communication system provided by some embodiments of the present invention, the second switch unit is implemented by a controllable switch device for unidirectional conduction, or is implemented by a series connection of a controllable switch device and a unidirectional conduction device.

[0014] According to the power supply and communication system provided by some embodiments of the present invention, the third switch unit is implemented by a unidirectional conduction device, or is implemented by a series connection of a controllable switch device and a unidirectional conduction device.

[0015] According to the power supply and communication system provided by some embodiments of the present invention, the power supply device further includes a third power supply terminal. The first sampling unit includes a fifth switching tube and a seventh resistor. The third power supply terminal, the seventh resistor, the fifth switching tube, and the ground terminal are connected in sequence. The connection point of the seventh resistor and the fifth switching tube is connected to the first control unit, and the transmission cable is electrically connected to the control pin of the fifth switching tube.

[0016] According to the power supply and communication system provided by some embodiments of the present invention, the power receiving device further includes a fourth power supply terminal. The second sampling unit includes a sixth switching tube and an eighth resistor. The fourth power supply terminal, the eighth resistor, the sixth switching tube, and the ground terminal are connected in sequence. The connection point of the eighth resistor and the sixth switching tube is connected to the second control unit, and the transmission cable is electrically connected to the control pin of the sixth switching tube.

[0017] According to the power supply and communication system provided by some embodiments of the present invention, the first driving unit includes a first optocoupler, and the first control unit realizes the on-off control of the first switching tube through the first optocoupler.

[0018] According to the power supply and communication system provided by some embodiments of the present invention, the second driving unit includes a second optocoupler, and the second control unit controls the on / off of the third switching tube through the second optocoupler.

[0019] According to the power supply and communication system provided by some embodiments of the present invention, the first sampling unit includes a third optocoupler, and the first control unit obtains the voltage signal of the transmission cable through the third optocoupler; the second sampling unit includes a fourth optocoupler, and the second control unit obtains the voltage signal of the transmission cable through the fourth optocoupler.

[0020] According to the power supply and communication system provided by some embodiments of the present invention, the power supply device further includes a first capacitor connected between the first power supply terminal and the ground terminal.

[0021] According to the power supply and communication system provided by some embodiments of the present invention, the power receiving device further includes a second capacitor connected between the second power supply terminal and the ground terminal.

[0022] In a second aspect, an embodiment of the present invention provides an air conditioner, including an indoor unit, an outdoor unit, and the power supply and communication system described in the first aspect of the above embodiments. The indoor unit includes the power supply device, and the outdoor unit includes the power receiving device.

[0023] Other features and advantages of the present invention will be described in the subsequent description, and some of them will be obvious from the description, or understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the description, claims, and drawings. Description of the Drawings

[0024] The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the description. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation to the technical solutions of the present invention.

[0025] The present invention will be further described below in conjunction with the drawings and embodiments; Figure 1 is a schematic block diagram of the power supply and communication system of the air conditioner provided by the embodiment of the present invention; Figure 2 is a module block diagram of the power supply and communication system with controllable characteristics of the third switching unit provided by the embodiment of the present invention; Figure 3 is a module block diagram of the power supply and communication system with only unidirectional conduction characteristics of the third switching unit provided by the embodiment of the present invention; Figure 4 is a circuit schematic diagram of the power supply and communication system of the air conditioner provided by Embodiment 1 of the present invention; Figure 5 It is the circuit schematic diagram of the power supply and communication system of the air conditioner provided in the second embodiment of the present invention; Figure 6 It is the circuit schematic diagram of the power supply and communication system of the air conditioner provided in the third embodiment of the present invention; Figure 7 It is the waveform diagram of the voltage signal transmitted on the transmission cable of the power supply and communication system of the air conditioner provided in the embodiment of the present invention. Detailed implementation manners

[0026] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0027] In the description of the embodiments of the present invention, the meaning of several is one or more, the meaning of multiple is more than two, understand greater than, less than, exceeding, etc. as not including the number itself, understand above, below, within, etc. as including the number itself, "at least one" means one or more, and "at least one of the following" and its similar expressions mean any combination of these items, including any combination of single items or plural items. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] It should be noted that words such as setting, installing, and connecting in the embodiments of the present invention should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the embodiments of the present invention in combination with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium.

[0029] 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.

[0030] In an air conditioning system, there is usually a situation where one device supplies power to another device, and the two devices communicate and exchange information with each other. Currently, the power supply and communication are usually carried out independently. The power supply uses a separate power supply line, and the communication also designs an independent communication line. The design is relatively simple, but it increases additional cables, the connection is complex, the cost is high, and because of the independent cables, there is a probability of cable damage, which will cause additional failures and reduce the product reliability.

[0031] Based on this, an embodiment of the present invention provides a power supply and communication system for an air conditioner and an air conditioner, which can improve the reliability of the system.

[0032] The following further elaborates on the embodiments of the present invention with reference to the accompanying drawings.

[0033] Figure 1 It is a schematic block diagram of the power supply and communication system for an air conditioner provided by an embodiment of the present invention. Refer to Figure 1 In an embodiment of the first aspect of the present invention, a power supply and communication system for an air conditioner is provided, including a power supply device 100, a power receiving device 200, and a transmission cable 300 connecting the power supply device 100 and the power receiving device 200. It should be noted that in this embodiment, the transmission cable 300 is a multiplexed cable, which serves as both a power supply line between the power supply device 100 and the power receiving device 200 and a communication line between the power supply device 100 and the power receiving device 200. Refer to Figure 2 The transmission cable 300 includes a first wire 310 and a second wire 320; therefore, there is only a pair of cables between the power supply device 100 and the power receiving device 200, and there is no need to separately set a power supply line and a communication line, which simplifies the connection between the power supply device 100 and the power receiving device 200.

[0034] Figure 2 It is a schematic block diagram of the power supply device 100 and the power receiving device 200 of the power supply and communication system provided by an embodiment of the present invention. Refer to Figure 2 The power supply device 100 includes a first control unit 110, a first switch unit 120 for supplying power to the transmission cable 300, and a first sampling unit 130 for obtaining a voltage signal from the transmission cable 300. The first control unit 110 is respectively connected to the first switch unit 120 and the first sampling unit 130. It should be noted that on the side of the power supply device 100, the first switch unit 120 can be a one-way switch, which conducts unidirectionally from the power supply device 100 to the first wire 310 of the transmission cable 300. Both ends of the second wire 320 of the transmission cable 300 are respectively connected to the ground terminal of the power supply device 100 and the ground terminal of the power receiving device 200. The power supply supplies power to the transmission cable 300 through the first switch unit 120; the first control unit 110 can control the on-off of the first switch unit 120. By controlling the rapid on-off of the first switch unit 120, the voltage sent to the transmission cable 300 can be chopped into pulses. The waveform of the voltage signal transmitted on the transmission cable 300 can refer to Figure 7 the first half shown in

[0035] Continue to refer to Figure 2, the power receiving device 200 includes a second control unit 210, a second switching unit 220 for supplying power to the transmission cable 300, a third switching unit 230 for obtaining electric energy from the transmission cable 300, and a second sampling unit 240 for obtaining a voltage signal from the transmission cable 300. The second control unit 210 is respectively connected to the second switching unit 220, the third switching unit 230, and the second sampling unit 240. It should be noted that on the side of the power receiving device 200, both the second switching unit 220 and the third switching unit 230 can be selected as unidirectional switches. The second switching unit 220 and the third switching unit 230 are reversely connected in parallel. The third switching unit 230 conducts unidirectionally from the first conductor 310 of the transmission cable 300 to the power receiving device 200, and the power supply supplies power to the power receiving device 200 from the transmission cable 300 through the unidirectionally conducting third switching unit 230; the second switching unit 220 conducts unidirectionally from the power receiving device 200 to the first conductor 310 of the transmission cable 300, and the power supply of the power receiving device 200 supplies power to the transmission cable 300 through the second switching unit 220; the second control unit 210 can control the on / off of the second switching unit 220. By controlling the rapid on / off of the second switching unit 220, the voltage sent from the power receiving device 200 to the transmission cable 300 can be chopped into pulses, and the waveform of the voltage signal transmitted on the transmission cable 300 can be referred to Figure 7 as shown in the second half of, so as to realize the return of a signal with a response instruction from the power receiving device 200 to the power supply device 100. In addition, the second sampling unit 240 is located before the second switching unit 220, analyzes the voltage pulse waveform from the transmission cable 300, and sends it to the second control unit 210.

[0036] According to the power supply and communication system of an air conditioner provided by some embodiments of the present invention, the power supply device 100 can control the first switching unit 120 to conduct through the first control unit 110, so as to supply power to the transmission cable 300. The power receiving device 200 obtains electric energy from the transmission cable 300 through the third switching unit 230, realizing the power supply from the power supply device 100 to the power receiving device 200; the power supply device 100 can also control the first switching unit 120 to alternately conduct and turn off through the first control unit 110, and provide a pulse voltage signal to the transmission cable 300, which is equivalent to coupling the communication signal in the power supply while supplying power to the transmission cable 300; the power receiving device 200 can obtain a voltage signal from the transmission cable 300 through the second sampling unit 240 to parse out the instruction sent by the power supply device 100, and transmit it to the second control unit 210; the power receiving device 200 can also control the second switching unit 220 to alternately conduct and turn off through the second control unit 210, and provide a response voltage signal to the transmission cable 300 to realize communication with the power supply device 100; in this power supply and communication system, the communication signal is coupled in the power transmission, eliminating the need for an independent signal transmission cable, which not only reduces the cost but also avoids the possibility of a separate communication line failure, improving the reliability of the system.

[0037] Figure 4 is the circuit schematic diagram of the power supply and communication system of the air conditioner provided in the first embodiment of the present invention. Refer to Figure 4 , in the power supply and communication system provided in some embodiments of the invention, the power supply device 100 further includes a first power supply terminal VCC1. The first switch unit 120 includes a first unidirectional conduction tube D1 and a first switch tube Q1 connected between the first power supply terminal VCC1 and the transmission cable 300. The first unidirectional conduction tube D1 and the first switch tube Q1 are reversely connected in parallel. It should be noted that the first unidirectional conduction tube D1 can be implemented by a diode or other devices with unidirectional conduction characteristics.

[0038] On the side of the power supply device 100 in this embodiment, the first switch unit 120 adopts the method of reversely connecting a controllable switch tube and a diode. From the first wire 310 of the transmission cable 300 to the side of the power supply device 100, it conducts unidirectionally through the first unidirectional conduction tube D1. From the first power supply terminal VCC1 of the power supply device 100 to the side of the first wire 310 of the transmission cable 300, it conducts through the first switch tube Q1. The high-frequency on-off of the first switch tube Q1 couples the communication signal into the power supply on the transmission cable 300.

[0039] Figure 5 is the circuit schematic diagram of the power supply and communication system of the air conditioner provided in the second embodiment of the present invention. Refer to Figure 5 , in the power supply and communication system provided in some embodiments of the invention, the power supply device 100 further includes a first power supply terminal VCC1. The first switch unit 120 includes a first switch tube Q1 and a first unidirectional conduction tube D1. The first power supply terminal VCC1, the first switch tube Q1, the first unidirectional conduction tube D1 and the first wire 310 of the transmission cable 300 are connected in series. For example: the first power supply terminal VCC1, the first switch tube Q1, the first unidirectional conduction tube D1 and the first wire 310 of the transmission cable 300 are connected in sequence; or the first power supply terminal VCC1, the first unidirectional conduction tube D1, the first switch tube Q1 and the first wire 310 of the transmission cable 300 are connected in sequence.

[0040] On the side of the power supply device 100 in this embodiment, the first switch unit 120 adopts the method of connecting a controllable switch tube and a diode in series, and only conducts unidirectionally. Through the high-frequency on-off of the first switch tube Q1, the communication signal is coupled into the power supply on the transmission cable 300.

[0041] Refer to Figure 2 , in the power supply and communication system provided in some embodiments of the invention, the power supply device 100 further includes a first driving unit 140 arranged between the control pin of the first control unit 110 and the first switch tube Q1.

[0042] In this embodiment, the first control unit 110 controls the on / off of the first switching transistor Q1 through the first driving unit 140. The first control unit 110 outputs a control signal to the first driving unit 140, so that the first driving unit 140 drives the first switching transistor Q1 to conduct or turn off according to this control signal.

[0043] Referring to Figure 4 , in the power supply and communication system provided in some embodiments of the invention, the first driving unit 140 includes a first resistor R1, a second resistor R2, a third resistor R3 and a second switching transistor Q2. The first power supply terminal VCC1, the first resistor R1, the second resistor R2, the second switching transistor Q2 and the ground terminal are connected in sequence. The third resistor R3 is connected between the control pin of the first control unit 110 and the second switching transistor Q2. The connection point of the first resistor R1 and the second resistor R2 is connected to the control pin of the first switching transistor Q1.

[0044] In this embodiment, when the first control unit 110 needs to control the first switching transistor Q1 to conduct, it outputs a control signal of the first level and transmits it to the control pin of the second switching transistor Q2 through the third resistor R3, so that the second switching transistor Q2 conducts, forming a conduction loop from the first power supply terminal VCC1 through the first resistor R1, the second resistor R2 and the second switching transistor Q2 to the ground terminal. The connection point of the first resistor R1 and the second resistor R2 transmits the voltage signal after voltage division to the control pin of the first switching transistor Q1, thereby driving the first switching transistor Q1 to conduct.

[0045] Referring to Figure 4 , in the power supply and communication system provided in some embodiments of the invention, the power receiving device 200 further includes a second power supply terminal VCC2. The second switching unit 220 includes a third switching transistor Q3 connected between the second power supply terminal VCC2 and the transmission cable 300. The third switching unit 230 includes a second unidirectional conduction tube D2, and the second unidirectional conduction tube D2 is reversely connected in parallel with the third switching transistor Q3. It should be noted that the second unidirectional conduction tube D2 can be implemented by a diode or other devices with unidirectional conduction characteristics.

[0046] On the side of the power receiving device 200 in this embodiment, the third switching unit 230 is implemented by using the second unidirectional conduction tube D2. From the first wire 310 of the transmission cable 300 to the side of the power receiving device 200, power is obtained from the transmission cable 300 through the unidirectional conduction of the second unidirectional conduction tube D2. The second switching unit 220 is implemented by using a controllable switching transistor with unidirectional conduction. From the second power supply terminal VCC2 of the power receiving device 200 to the first wire 310 side of the transmission cable 300, conduction is achieved through the third switching transistor Q3. The high-frequency on / off of the third switching transistor Q3 couples the communication signal into the power supply on the transmission cable 300 to realize communication with the power supply device 100.

[0047] Reference Figure 2 In the power supply and communication system provided in some embodiments of the invention, the power supply device 100 further includes a second driving unit 250 disposed between the control pin of the second control unit 210 and the third switching transistor Q3.

[0048] In this embodiment, the second control unit 210 controls the on / off of the third switching transistor Q3 through the second driving unit 250. The second control unit 210 outputs a control signal to the second driving unit 250, so that the second driving unit 250 drives the third switching transistor Q3 to conduct or turn off according to the control signal.

[0049] Reference Figure 4 In the power supply and communication system provided in some embodiments of the invention, the second driving unit 250 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a fourth switching transistor Q4. The second power supply terminal VCC2, the fourth resistor R4, the fifth resistor R5, the fourth switching transistor Q4, and the ground terminal are connected in sequence. The sixth resistor R6 is connected between the control pin of the second control unit 210 and the fourth switching transistor Q4. The connection point of the fourth resistor R4 and the fifth resistor R5 is connected to the control pin of the third switching transistor Q3.

[0050] In this embodiment, when the second control unit 210 needs to control the third switching transistor Q3 to conduct, it outputs a control signal of the second level and transmits it to the control pin of the fourth switching transistor Q4 through the sixth resistor R6, so that the fourth switching transistor Q4 conducts, forming a conduction loop from the second power supply terminal VCC2 through the fourth resistor R4, the fifth resistor R5, and the fourth switching transistor Q4 to the ground terminal. The connection point of the fourth resistor R4 and the fifth resistor R5 transmits the voltage signal after voltage division to the control pin of the third switching transistor Q3, thereby driving the third switching transistor Q3 to conduct.

[0051] Combined Figure 2 and Figure 3 are used to introduce the implementation manners of the second switching unit 220 and the third switching unit 230. Since the second switching unit 220 is mainly used to supply power from the power receiving device 200 to the transmission cable 300 and couple the communication signal to the power supply in the transmission cable 300 to realize communication with the power supply device 100, the second switching unit 220 needs to have controllable characteristics. The second switching unit 220 can be implemented by a controllable switching device for unidirectional conduction, such as a triode or a MOS transistor, etc. The second switching unit 220 can also be implemented by connecting a controllable switching device in series with a unidirectional conduction device. The third switching unit 230 is mainly used to obtain electric energy from the transmission cable 300. Therefore, the third switching unit 230 can only have the characteristic of unidirectional conduction. For example, refer to Figure 3As shown, the third switch unit 230 is implemented by using a unidirectional conduction device such as a diode. Additionally, the third switch unit 230 can also have a controllable characteristic while having the unidirectional conduction characteristic. For example, referring to Figure 2 As shown, the third switch unit 230 is implemented by connecting a controllable switch device in series with a unidirectional conduction device.

[0052] Referring to Figure 4 or Figure 5 , in the power supply and communication system provided in some embodiments of the invention, the power supply device 100 further includes a third power supply terminal VCC3. The first sampling unit 130 includes a fifth switching transistor Q5 and a seventh resistor R7. The third power supply terminal VCC3, the seventh resistor R7, the fifth switching transistor Q5, and the ground terminal are connected in sequence. The connection point of the seventh resistor R7 and the fifth switching transistor Q5 is connected to the first control unit 110. The transmission cable 300 is electrically connected to the control pin of the fifth switching transistor Q5.

[0053] On the side of the power supply device 100 in this embodiment, the first sampling unit 130 resolves the communication signal transmitted by the power receiving device 200 from the communication cable 300 through the fifth switching transistor Q5, and transmits it to the first control unit 110 through the connection point of the seventh resistor R7 and the fifth switching transistor Q5. Specifically, in Figure 4 As shown in the embodiment, the first sampling unit 130 further includes a third diode D3 and a ninth resistor R9. The first wire 310 of the transmission cable 300 is connected to the cathode of the third diode D3 and one end of the ninth resistor R9. The other end of the ninth resistor R9 is connected to the second wire 320 of the transmission cable 300. The anode of the third diode D3 is connected to the control pin of the fifth switching transistor Q5. Additionally, in Figure 5 As shown in the embodiment, the first sampling unit 130 further includes a fifth diode D5, an eleventh resistor R11, and a twelfth resistor R12. The first wire 310 of the transmission cable 300 is connected to the anode of the fifth diode D5. The cathode of the fifth diode D5 is connected to one end of the eleventh resistor R11. The other end of the eleventh resistor R11 is connected to one end of the twelfth resistor R12 and the control pin of the fifth switching transistor Q5. The other end of the twelfth resistor R12 is connected to the second wire 320 of the transmission cable 300.

[0054] Referring to Figure 4 or Figure 5 , in the power supply and communication system provided in some embodiments of the invention, the power receiving device 200 further includes a fourth power supply terminal VCC4. The second sampling unit 240 includes a sixth switching transistor Q6 and an eighth resistor R8. The fourth power supply terminal VCC4, the eighth resistor R8, the sixth switching transistor Q6, and the ground terminal are connected in sequence. The connection point of the eighth resistor R8 and the sixth switching transistor Q6 is connected to the second control unit 210. The transmission cable 300 is electrically connected to the control pin of the sixth switching transistor Q6.

[0055] On the power receiving device 200 side of this embodiment, the second sampling unit 240 resolves the communication signal transmitted by the power supply device 100 from the communication cable 300 through the sixth switching tube Q6, and transmits it to the second control unit 210 through the connection point of the eighth resistor R8 and the sixth switching tube Q6. Specifically, in Figure 4 the embodiment shown, the second sampling unit 240 further includes a fourth diode D4 and a tenth resistor R10. The first wire 310 of the transmission cable 300 is connected to the cathode of the fourth diode D4 and one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to the second wire 320 of the transmission cable 300, and the anode of the fourth diode D4 is connected to the control pin of the sixth switching tube Q6. Additionally, in Figure 5 the embodiment shown, the second sampling unit 240 further includes a sixth diode D6, a thirteenth resistor R13, and a fourteenth resistor R14. The first wire 310 of the transmission cable 300 is connected to the anode of the sixth diode D6, the cathode of the sixth diode D6 is connected to one end of the thirteenth resistor R13, the other end of the thirteenth resistor R13 is connected to one end of the fourteenth resistor R14 and the control pin of the sixth switching tube Q6, and the other end of the fourteenth resistor R14 is connected to the second wire 320 of the transmission cable 300.

[0056] Referring to Figure 6 , in the power supply communication system provided in some embodiments of the invention, the first driving unit 140 includes a first optocoupler U1, and the first control unit 110 realizes the on-off control of the first switching tube Q1 through the first optocoupler U1.

[0057] Specifically, in this embodiment, the power supply device 100 further includes a fifth power supply terminal VCC5, and the first driving unit 140 further includes a fifteenth resistor R15, a sixteenth resistor R16, and a seventeenth resistor R17. The output terminal of the first control unit 110 is connected to one end of the seventeenth resistor R17, the other end of the seventeenth resistor R17 is connected to the anode of the light emitter of the first optocoupler U1, the cathode of the light emitter of the first optocoupler U1 is connected to the ground terminal, one end of the light receiver of the first optocoupler U1 is connected to the fifth power supply terminal VCC5, the other end of the light receiver of the first optocoupler U1 is connected to one end of the sixteenth resistor R16, the other end of the sixteenth resistor R16 is connected to one end of the fifteenth resistor R15 and the control pin of the first switching tube Q1, and the other end of the fifteenth resistor R15 is connected to the first power supply terminal VCC1.

[0058] Referring to Figure 6 , in the power supply communication system provided in some embodiments of the invention, the second driving unit 250 includes a second optocoupler U2, and the second control unit 210 realizes the on-off control of the third switching tube Q3 through the second optocoupler U2.

[0059] Specifically, in this embodiment, the power receiving device 200 further includes a sixth power supply terminal VCC6, the second driving unit 250 further includes an eighteenth resistor R18, a nineteenth resistor R19, and a twentieth resistor R20. The output terminal of the second control unit 210 is connected to one end of the twentieth resistor R17. The other end of the twentieth resistor R20 is connected to the anode of the light emitting device of the second optocoupler U2. The cathode of the light emitting device of the second optocoupler U2 is connected to the ground terminal. One end of the light receiving device of the second optocoupler U2 is connected to the sixth power supply terminal VCC6. The other end of the light receiving device of the second optocoupler U2 is connected to one end of the nineteenth resistor R19. The other end of the nineteenth resistor R19 is connected to one end of the eighteenth resistor R18 and the control pin of the third switching transistor Q3. The other end of the eighteenth resistor R18 is connected to the second power supply terminal VCC2.

[0060] Referring to Figure 6 , in the power supply and communication system provided in some embodiments of the invention, the first sampling unit 130 includes a third optocoupler U3, and the first control unit 110 obtains the voltage signal of the transmission cable 300 through the third optocoupler U3; the second sampling unit 240 includes a fourth optocoupler U4, and the second control unit 210 obtains the voltage signal of the transmission cable 300 through the fourth optocoupler U4.

[0061] Specifically, in this embodiment, the first sampling unit 130 further includes a twenty-first resistor R21 and a twenty-second resistor R22. The first wire 310 of the transmission cable 300 is connected to one end of the twenty-first resistor R21. The other end of the twenty-first resistor R21 is connected to the anode of the light emitting device of the third optocoupler U3. The cathode of the light emitting device of the third optocoupler U3 is connected to the second wire 320 of the transmission cable 300; one end of the light receiving device of the third optocoupler U3 is connected to the third power supply terminal VCC3. The other end of the light receiving device of the third optocoupler U3 is connected to one end of the twenty-second resistor R22 and to the input port of the first control unit 110. The other end of the twenty-second resistor R22 is connected to the second wire 320 of the transmission cable 300; the second sampling unit 240 further includes a twenty-third resistor R23 and a twenty-fourth resistor R24. The first wire 310 of the transmission cable 300 is connected to one end of the twenty-third resistor R23. The other end of the twenty-third resistor R23 is connected to the anode of the light emitting device of the fourth optocoupler U4. The cathode of the light emitting device of the fourth optocoupler U4 is connected to the second wire 320 of the transmission cable 300; one end of the light receiving device of the fourth optocoupler U4 is connected to the fourth power supply terminal VCC4. The other end of the light receiving device of the fourth optocoupler U4 is connected to one end of the twenty-fourth resistor R24 and to the input port of the second control unit 210. The other end of the twenty-fourth resistor R24 is connected to the second wire 320 of the transmission cable 300.

[0062] Referring to Figures 2 to 6, in the power supply and communication system provided by some embodiments of the invention, the power supply device 100 further includes a first capacitor C1 connected between the first power supply terminal VCC1 and the ground terminal; the power receiving device 200 further includes a second capacitor C2 connected between the second power supply terminal VCC2 and the ground terminal.

[0063] In this embodiment, the first capacitor C1 functions to store energy and filter, enabling the voltage of the first power supply terminal VCC1 to be stable; similarly, the second capacitor C2 functions to store energy and filter, enabling the voltage of the second power supply terminal VCC2 to be stable.

[0064] In addition, an embodiment of the second aspect of the present invention provides an air conditioner, including an indoor unit, an outdoor unit, and the power supply and communication system of the above-mentioned first aspect embodiment. The indoor unit includes the power supply device 100, and the outdoor unit includes the power receiving device 200.

[0065] According to the air conditioner provided by some embodiments of the present invention, the power supply device 100 in the indoor unit can control the first switch unit 120 to conduct through the first control unit 110, thereby supplying power to the transmission cable 300. The power receiving device 200 in the outdoor unit obtains electric energy from the transmission cable 300 through the third switch unit 230, realizing power supply from the power supply device 100 to the power receiving device 200; the power supply device 100 can also control the first switch unit 120 to alternately conduct and turn off through the first control unit 110, providing a pulsed voltage signal to the transmission cable 300, which is equivalent to coupling the communication signal in the power supply while supplying power to the transmission cable 300; the power receiving device 200 can obtain a voltage signal from the transmission cable 300 through the second sampling unit 240 to parse the instruction sent by the power supply device 100 and transmit it to the second control unit 210; the power receiving device 200 can also control the second switch unit 220 to alternately conduct and turn off through the second control unit 210, providing a response voltage signal to the transmission cable 300 to realize communication with the power supply device 100; in this power supply and communication system, the communication signal is coupled in the power transmission, eliminating the need for an independent signal transmission cable, which not only reduces costs but also avoids the possibility of failure of a separate communication line, improving the reliability of the system.

[0066] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A power supply and communication system for an air conditioner, characterized in that, It includes a power supply device, a power receiving device, and a transmission cable connecting the power supply device and the power receiving device; The power supply device includes a first control unit, a first switch unit for supplying power to the transmission cable, and a first sampling unit for obtaining a voltage signal from the transmission cable. The first control unit is respectively connected to the first switch unit and the first sampling unit; The power receiving device includes a second control unit, a second switch unit for supplying power to the transmission cable, a third switch unit for obtaining electric energy from the transmission cable, and a second sampling unit for obtaining a voltage signal from the transmission cable. The second control unit is respectively connected to the second switch unit, the third switch unit, and the second sampling unit.

2. The power supply and communication system according to claim 1, characterized in that, The power supply device further includes a first power supply terminal. The first switch unit includes a first unidirectional conduction tube and a first switch tube connected between the first power supply terminal and the transmission cable. The first unidirectional conduction tube is reversely connected in parallel with the first switch tube.

3. The power supply and communication system according to claim 1, characterized in that, The power supply device further includes a first power supply terminal. The first switch unit includes a first switch tube and a first unidirectional conduction tube. The first power supply terminal, the first switch tube, the first unidirectional conduction tube, and the transmission cable are connected in series.

4. The power supply and communication system according to claim 2 or 3, characterized in that The power supply device further includes a first driving unit provided between the control pin of the first control unit and the first switch tube.

5. The power supply and communication system according to claim 4, wherein The first driving unit includes a first resistor, a second resistor, a third resistor, and a second switch tube. The first power supply terminal, the first resistor, the second resistor, the second switch tube, and the ground terminal are connected in sequence. The third resistor is connected between the first control unit and the control pin of the second switch tube. The connection point of the first resistor and the second resistor is connected to the control pin of the first switch tube.

6. The power supply and communication system according to claim 1, wherein The power receiving device further includes a second power supply terminal. The second switch unit includes a third switch tube connected between the second power supply terminal and the transmission cable. The third switch unit includes a second unidirectional conduction tube. The second unidirectional conduction tube is reversely connected in parallel with the third switch tube.

7. The power supply and communication system according to claim 6, characterized in that The power supply device further includes a second driving unit provided between the control pin of the second control unit and the third switch tube.

8. The power supply and communication system according to claim 7, characterized in that, The second driving unit includes a fourth resistor, a fifth resistor, a sixth resistor, and a fourth switch tube. The second power supply terminal, the fourth resistor, the fifth resistor, the fourth switch tube, and the ground terminal are connected in sequence. The sixth resistor is connected between the second control unit and the control pin of the fourth switch tube. The connection point of the fourth resistor and the fifth resistor is connected to the control pin of the third switch tube.

9. The power supply and communication system according to claim 1, characterized in that The second switch unit is implemented by a controllable switch device for unidirectional conduction, or is implemented by a series connection of a controllable switch device and a unidirectional conduction device.

10. The power supply and communication system according to claim 1, characterized in that, The third switch unit is implemented by a unidirectional conduction device, or is implemented by a series connection of a controllable switch device and a unidirectional conduction device.

11. The power supply and communication system according to claim 1, wherein, The power supply device further includes a third power terminal. The first sampling unit includes a fifth switching tube and a seventh resistor. The third power terminal, the seventh resistor, the fifth switching tube, and the ground terminal are connected in sequence. The connection point between the seventh resistor and the fifth switching tube is connected to the first control unit. The transmission cable is electrically connected to the control pin of the fifth switching tube.

12. The power supply and communication system according to claim 1, characterized in that, The power receiving device further includes a fourth power terminal. The second sampling unit includes a sixth switching tube and an eighth resistor. The fourth power terminal, the eighth resistor, the sixth switching tube, and the ground terminal are connected in sequence. The connection point between the eighth resistor and the sixth switching tube is connected to the second control unit. The transmission cable is electrically connected to the control pin of the sixth switching tube.

13. The power supply and communication system according to claim 4, characterized in that The first driving unit includes a first optocoupler. The first control unit realizes the on / off control of the first switching tube through the first optocoupler.

14. The power supply and communication system according to claim 7, characterized in that, The second driving unit includes a second optocoupler. The second control unit realizes the on / off control of the third switching tube through the second optocoupler.

15. The power supply and communication system according to claim 1, wherein The first sampling unit includes a third optocoupler. The first control unit obtains the voltage signal of the transmission cable through the third optocoupler; the second sampling unit includes a fourth optocoupler. The second control unit obtains the voltage signal of the transmission cable through the fourth optocoupler.

16. The power supply and communication system according to claim 2 or 3, characterized in that, The power supply device further includes a first capacitor connected between the first power terminal and the ground terminal.

17. The power supply and communication system according to claim 6, wherein The power receiving device further includes a second capacitor connected between the second power terminal and the ground terminal.

18. An air conditioner, characterized in that, Including an indoor unit, an outdoor unit, and the power supply and communication system according to any one of claims 1 to 16, wherein the indoor unit includes the power supply device, and the outdoor unit includes the power receiving device.

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