CN114704917B - A zero-live communication circuit, communication system and air conditioning system - Google Patents

A zero-live communication circuit, communication system and air conditioning system Download PDF

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Publication number
CN114704917B
CN114704917B CN202210442006.9A CN202210442006A CN114704917B CN 114704917 B CN114704917 B CN 114704917B CN 202210442006 A CN202210442006 A CN 202210442006A CN 114704917 B CN114704917 B CN 114704917B
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resistor
communication
input end
comparator
voltage
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CN114704917A (en
Inventor
于洪涛
郑嘉良
黄银彬
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56—Remote control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Air Conditioning Control Device (AREA)
  • Telephonic Communication Services (AREA)

Abstract

The invention discloses a zero and live wire communication circuit, a communication system and an air conditioning system. The zero-live wire communication circuit comprises a logic operation module, a first switching tube and a current adjustment module, wherein the input end of the logic operation module is connected with the input end of a communication loop, the output end of the logic operation module is connected with the control end of the first switching tube and is used for outputting a control signal according to the voltage input by the input end of the communication loop, the input end of the first switching tube is connected with the control end of the current adjustment module, the output end of the first switching tube is grounded and is used for changing the on-off state of the first switching tube according to the control signal so as to control the switching branch circuits arranged in parallel in the current adjustment module to be switched on and then adjust the current of the communication loop, and the current adjustment module is arranged between the input end and the output end of the communication loop. According to the invention, when the mains voltage is greatly reduced, the current of the communication loop is controlled to be increased, and the communication quality is ensured.

Description

Zero live wire communication circuit, communication system and air conditioning system
Technical Field
The invention relates to the technical field of electronic communication, in particular to a zero-live wire communication circuit, a communication system and an air conditioning system.
Background
At present, communication among different communication main bodies of a household appliance system (such as an air conditioning system) generally adopts a zero-fire wire communication mode. The communication mode is relatively simple, a special communication chip is not needed, a communication signal forms a signal communication loop through a COM line and a zero line, and the use cost of hardware can be greatly reduced. However, when the zero-live wire communication is adopted, 220V alternating current is subjected to voltage division and rectification to obtain a voltage signal, the communication signal is loaded on the voltage signal, and the voltage signal is used as a medium between different communication main bodies to transmit signals. If the mains voltage is unstable or is disturbed, and the mains voltage is lower than 220V and the deviation is larger, the voltage value of the communication voltage signal is also greatly reduced, so that the current of the communication loop is reduced, and the quality of the communication signal between the communication main bodies is affected.
Aiming at the problem that the quality of communication signals is affected due to the large-amplitude reduction of the mains voltage in the prior art, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a zero-live wire communication circuit, a communication system and an air conditioning system, which are used for solving the problem that the quality of communication signals is affected due to the fact that the mains voltage is greatly reduced in the prior art.
In order to solve the above technical problems, the present invention provides a zero-live wire communication circuit, wherein the circuit comprises:
the input end of the logic operation module is connected with the input end of the communication loop, and the output end of the logic operation module is connected with the control end of the first switching tube and is used for outputting a control signal according to the voltage input by the input end of the communication loop;
The input end of the first switching tube is connected with the control end of the current adjusting module, the output end of the first switching tube is grounded and is used for changing the on-off state of the first switching tube according to the control signal, so that two parallel switching branches in the current adjusting module are controlled to be switched on, and the current of the communication loop is adjusted;
The current adjusting module is arranged between the input end and the output end of the communication loop.
Further, the current adjustment module includes:
The first switch branch comprises a second switch tube and a first resistor which are arranged in series;
the second switching branch comprises a third switching tube and a second resistor which are arranged in series;
the resistance value of the first resistor is larger than that of the second resistor, and the types of the second switch tube and the third switch tube are different.
Further, the second switching tube is a PNP switching tube, and the third switching tube is an NPN switching tube.
Further, the logic operation module includes:
The first end of the first voltage dividing unit is connected with the input end of the communication loop, the second end of the first voltage dividing unit is grounded, and the third end of the first voltage dividing unit is connected with the non-inverting input end of the first comparator;
and the inverting input end of the first comparator inputs a first reference voltage, and the output end of the first comparator is connected with the control end of the first switching tube.
Further, the first voltage dividing unit includes:
And the third resistor and the fourth resistor are arranged in series, wherein the third resistor is connected with the input end of the communication loop, the fourth resistor is grounded, and a circuit between the third resistor and the fourth resistor is connected with the non-inverting input end of the first comparator.
Further, the logic operation module further includes:
The first input end of the AND gate arithmetic unit is connected with the output end of the first comparator, the second input end of the AND gate arithmetic unit is connected with the output end of the second comparator, and the output end of the AND gate arithmetic unit is connected with the control end of the first switching tube;
the first end of the second voltage division unit is connected with a voltage source, the second end of the second voltage division unit is grounded, and the third end of the second voltage division unit is connected with the inverting input end of the second comparator;
and the non-inverting input end of the second comparator inputs a second reference voltage.
Further, the second voltage dividing unit includes:
And the fifth resistor and the sixth resistor are arranged in series, wherein the fifth resistor is connected with the voltage source, the sixth resistor is grounded, a circuit between the fifth resistor and the sixth resistor is connected with the inverting input end of the second comparator, the fifth resistor is a constant value resistor, and the sixth resistor is the total resistor of the communication loop.
Further, the circuit further comprises:
and the seventh resistor and the eighth resistor are connected in series, wherein the seventh resistor is connected with the output end of the logic operation module, the eighth resistor is grounded, and a circuit between the seventh resistor and the eighth resistor is connected with the control end of the first switching tube.
The invention also provides another zero fire wire communication circuit, which comprises:
The logic operation module comprises a second voltage division unit, a logic operation module and a control module, wherein the input end of the second voltage division unit is connected with a voltage source, the output end of the logic operation module is connected with the control end of a first switch tube and is used for outputting a control signal according to the total resistance of the communication loop, the second voltage division unit comprises a fifth resistor and a sixth resistor which are arranged in series, the fifth resistor is connected with the voltage source, the sixth resistor is grounded, a circuit between the fifth resistor and the sixth resistor is connected with the inverting input end of a second comparator, the fifth resistor is a constant value resistor, and the sixth resistor is the total resistance of the communication loop;
The non-inverting input end of the second comparator inputs reference voltage, and the output end of the second comparator is connected with the first switching tube;
The input end of the first switching tube is connected with the control end of the current adjusting module, the output end of the first switching tube is grounded and is used for changing the on-off state of the first switching tube according to the control signal, so that two parallel switching branches in the current adjusting module are controlled to be switched on, and the current of the communication loop is adjusted;
The current adjusting module is arranged between the input end and the output end of the communication loop.
The invention also provides a communication system which comprises a first communication main body and a second communication main body and is characterized by further comprising the first zero-live wire communication circuit, wherein the first communication main body is connected with the input end of the communication loop, and the second communication main body is connected with the output end of the communication loop.
The invention also provides another communication system which comprises a first communication main body and a second communication main body and is characterized by further comprising the second zero-fire wire communication circuit, wherein the first communication main body is connected with the input end of the communication loop, and the second communication main body is connected with the output end of the communication loop.
Further, the communication system is an air conditioning system, the first communication main body is an air conditioning inner unit, and the second communication main body is an air conditioning outer unit.
By applying the technical scheme of the invention, the logic operation module outputs the control signal according to the voltage carried by the carrier signal input by the input end of the communication loop, and the control signal controls the switching on of the two parallel switch branches in the current control module, so as to adjust the current of the communication loop, thereby being capable of controlling the current increase of the communication loop and ensuring the communication quality when the mains voltage is greatly reduced.
Drawings
Fig. 1 is a block diagram of a zero fire wire communication circuit according to an embodiment of the present invention;
fig. 2 is a block diagram of a zero line communication circuit according to another embodiment of the present invention;
fig. 3 is a block diagram of a zero fire wire communication circuit according to yet another embodiment of the present invention;
Fig. 4 is a block diagram of a zero fire wire communication circuit according to yet another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two.
It should be understood that the term "and/or" as used herein is merely an association relationship describing the associated object, and means that there may be three relationships, e.g., a and/or B, and that there may be three cases where a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe the resistances in embodiments of the present invention, these resistances should not be limited to these terms. These terms are only used to distinguish between different resistances. For example, a first resistor may also be referred to as a second resistor, and similarly, a second resistor may also be referred to as a first resistor, without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at" or "when" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of additional like elements in a commodity or device comprising the element.
Alternative embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a zero-live wire communication circuit, fig. 1 is a block diagram of the zero-live wire communication circuit according to an embodiment of the present invention, as shown in fig. 1, the zero-live wire circuit includes:
The input end of the logic operation module 10 is connected with the input end of the communication loop, the input end of the communication loop inputs a carrier signal formed by rectifying 220V mains supply through partial pressure, the output end of the logic operation module 10 is connected with the control end (base electrode) of the first switching tube Q1, and the logic operation module 10 outputs a control signal according to the voltage Vt carried by the carrier signal input by the input end of the communication loop.
The input end (collector) of the first switching tube Q1 is connected to the control end of the current adjusting module 20, and the output end thereof is grounded, so as to change its on-off state according to the control signal, thereby controlling the two parallel switching branches in the current adjusting module to switch on and adjust the current of the communication loop, and the current adjusting module 20 is disposed between the input end and the output end COM of the communication loop.
In the zero-live wire communication circuit of the embodiment, the logic operation module 10 is arranged, a control signal is output according to the voltage Vt carried by the carrier signal input by the input end of the communication circuit, and the control signal controls the switching and conduction of two parallel switch branches in the current control module 20, so that the current of the communication circuit is adjusted, and the current increase of the communication circuit can be controlled when the mains voltage is greatly reduced, and the communication quality is ensured.
Example 2
In order to realize the switching conduction of the two switching branches, as shown in fig. 2, the current adjusting module 20 includes a first switching branch including a second switching tube Q2 and a first resistor R1, which are arranged in series, a second switching branch including a third switching tube Q3 and a second resistor R2, which are arranged in series, wherein the resistance of the first resistor R1 is greater than the resistance of the second resistor R2, and the types of the second switching tube Q2 and the third switching tube Q3 are different, and in one embodiment of the present invention, the first switching tube Q1 is a PNP type switching tube, the second switching tube Q2 is a PNP type switching tube, and the third switching tube Q3 is an NPN type switching tube.
In order to output different control signals according to the voltage Vt carried by the carrier signal input by the input end of the communication loop, the logic operation module 10 comprises a first voltage dividing unit, a first comparator U1, a second comparator and a first reference voltage V01, wherein the first end of the first voltage dividing unit is connected with the input end of the communication loop, the second end of the first voltage dividing unit is grounded, the third end of the first voltage dividing unit is connected with the non-inverting input end of the first comparator U1, the inverting input end of the first comparator U1 is input with the first reference voltage V01, and the output end of the first comparator U1 is connected with the control end of the first switching tube Q1.
Since the input voltage of the comparator cannot be too high, the voltage Vt carried by the carrier signal needs to be divided, and in order to realize the voltage division function, the first voltage division unit comprises a third resistor R3 and a fourth resistor R4 which are arranged in series, wherein the third resistor R3 is connected with the input end of the communication loop, the fourth resistor R4 is grounded, and a line between the third resistor R3 and the fourth resistor R4 is connected with the non-inverting input end of the first comparator U1.
In order to avoid the overlarge voltage input by the control end of the first switching tube Q1, the zero-live wire communication circuit further comprises a seventh resistor R7 and an eighth resistor R8 which are arranged in series, wherein the seventh resistor R7 is connected with the output end of the logic operation module 10, the eighth resistor R8 is grounded, a circuit between the seventh resistor R7 and the eighth resistor R8 is connected with the control end of the first switching tube Q1, and the seventh resistor R7 and the eighth resistor R8 are used for dividing the voltage output by the logic operation module 10.
The working principle of the zero and live wire communication circuit is that when the mains voltage is about 220V, the voltage Vt carried by a carrier signal is in a normal range, and the voltage V1 is obtained after the Vt is divided by the third resistor R3 and the fourth resistor R4. The non-inverting input end of the first comparator U1 inputs a preset first reference voltage V01, under the default condition, V1 is higher than V01, the first comparator U1 outputs a high level "1", the first switching tube Q1 is driven to be turned on, the second switching tube Q2 is further turned on, and the third switching tube Q3 is turned off. The second switching tube Q2 and the first resistor R1 are connected into the communication circuit, the resistance value of the first resistor R1 is larger, the current of the communication circuit in the communication circuit can be effectively reduced, and the device is prevented from being damaged by large current through the communication circuit.
When the commercial voltage is lower than 220V and the deviation is larger, and the voltage Vt carried by the carrier signal is greatly reduced, the voltage Vt carried by the carrier signal is divided by the third resistor R3 and the fourth resistor R4 to obtain the voltage V1 after fluctuation, at the moment, the voltage V1 is lower than V01, the voltage U1 outputs a low level "0", the first switching tube Q1 is driven to be turned off, the second switching tube Q2 is further turned off, and the third switching tube Q3 is turned on. The third switching tube Q3 and the second resistor R2 are connected into the communication loop, the resistance value of the second resistor R2 is smaller, the condition that the current of the communication loop is too small due to too low working voltage can be effectively avoided, the communication quality is prevented from being reduced due to the reduction of the current of the communication loop, and the communication quality is improved.
Example 3
In order to further ensure the communication quality, as shown in fig. 3, the logic operation module 10 further includes an and gate operator U3, a first input terminal thereof connected to the output terminal of the first comparator U1, a second input terminal thereof connected to the output terminal of the second comparator U2, an output terminal thereof connected to the control terminal of the first switching tube Q1, a second voltage dividing unit, a first terminal thereof connected to the voltage source (may be 3.3V), a second terminal thereof grounded, a third terminal thereof connected to the inverting input terminal of the second comparator U2, and a second reference voltage V02. The second voltage dividing unit comprises a fifth resistor R5 and a sixth resistor R6 which are arranged in series, wherein the fifth resistor R5 is connected with a voltage source, the sixth resistor R6 is grounded, a circuit between the fifth resistor R5 and the sixth resistor R6 is connected with an inverting input end of the second comparator U2, the fifth resistor R5 is a constant value resistor, and the sixth resistor R6 is the total resistor of the communication loop.
The operation logic of the and gate operator is simply "0", that is, if either one of the first comparator U1 and the second comparator U2 outputs "0", the and gate operator U3 outputs "0", and if both the first comparator U1 and the second comparator U2 output "1", the and gate operator U3 outputs "1", based on the above, the operation principle of the zero-live wire communication circuit of the present embodiment is as follows:
When the mains voltage is about 220V and the voltage Vt carried by the carrier signal is within the normal range, the voltage Vt carried by the carrier signal is divided by the third resistor R3 and the fourth resistor R4 to obtain the voltage V1. The non-inverting input terminal of the first comparator U1 inputs a preset first reference voltage V01, and in a default case, V1 is higher than V01, and the first comparator U1 outputs a high level "1", and at this time, in combination with a change condition of the total resistance R6 of the communication circuit, there are the following two situations:
First, if the communication loop resistor R6 is normal at this time, the inverting input terminal of the second comparator U2 inputs a preset second reference voltage V02, the voltage of the voltage source is divided by the fifth resistor R5 and the sixth resistor R6 to obtain a voltage V2, under the default that V02 is higher than V2, the second comparator U2 outputs a high level "1", the and gate operator U3 outputs a high level "1", so as to drive the first switching tube Q1 to be turned on, and then the second switching tube Q2 is turned on, and the third switching tube Q3 is turned off. The second switching tube Q2 and the first resistor R1 are connected into the communication circuit, the resistance value of the first resistor R1 is larger, the current of the communication circuit in the communication circuit can be effectively reduced, and the device is prevented from being damaged by large current through the communication circuit.
Second, if the total resistance R6 of the communication circuit is greatly increased (the total resistance of the communication circuit is increased along with the length of the communication line), the voltage of the voltage source is divided by the fifth resistor R5 and the sixth resistor R6 to obtain the voltage V2, at this time, V2 is higher than V02, the second comparator U2 outputs a low level "0", the and gate operator U3 outputs a low level "0", the first switching tube Q1 is driven to be turned off, and the second switching tube Q2 is further turned off, and the third switching tube Q3 is turned on. The third switching tube Q3 and the second resistor R2 are connected into the communication loop, the resistance value of the second resistor R2 is smaller, the situation that the current of the communication loop is too small due to the increase of the total resistance of the communication loop can be effectively avoided, the communication quality is prevented from being reduced due to the reduction of the current of the communication loop, and the communication quality is improved.
When the mains voltage is lower than 220V and the deviation is large, and the voltage Vt carried by the carrier signal is greatly reduced, the voltage Vt carried by the carrier signal is divided by the third resistor R3 and the fourth resistor R4 to obtain the voltage V1 after fluctuation, at the moment, the voltage V1 is lower than V01, the voltage U1 outputs a low level "0", at the moment, no matter the second comparator U2 outputs a low level "0" or a high level "1", the and gate operator U3 outputs a low level "0", the first switching tube Q1 is driven to be turned off, the second switching tube Q2 is further turned off, the third switching tube Q3 is turned on, the third switching tube Q3 and the second resistor R2 are connected into the communication loop, the resistance value of the second resistor R2 is small, the condition that the current of the communication loop is too small can be effectively avoided, the communication quality is prevented from being reduced due to the reduction of the current of the communication loop, and the communication quality is improved.
Example 4
This embodiment provides another zero-live wire communication circuit, fig. 4 is a block diagram of the zero-live wire communication circuit according to another embodiment of the present invention, and as shown in fig. 4, the zero-live wire communication circuit includes:
The device comprises a fifth resistor R5 and a sixth resistor R6 which are arranged in series, wherein the fifth resistor R5 is connected with a voltage source, the sixth resistor R6 is grounded, a circuit between the fifth resistor R5 and the sixth resistor R6 is connected with an inverting input end of a second comparator, the fifth resistor R5 is a constant value resistor, the sixth resistor R6 is the total resistor of a communication loop, a reference voltage V0 is input into a non-inverting input end of the comparator U, an output end of the comparator U is connected with a first switching tube Q1, an input end of the first switching tube Q1 is connected with a control end of a current adjusting module, an output end of the first switching tube Q1 is grounded and used for changing the on-off state of the comparator according to a control signal, and then switching on of two parallel switching branches in the current adjusting module is controlled, and current of the communication loop is adjusted, and the current adjusting module is arranged between the input end and the output end of the communication loop. The specific structure of the current adjusting module is the same as that of the embodiment, and the current adjusting module comprises a first switching branch circuit, wherein the first switching branch circuit comprises a second switching tube Q2 and a first resistor R1 which are arranged in series, the second switching branch circuit comprises a third switching tube Q3 and a second resistor R2 which are arranged in series, the resistance value of the first resistor R1 is larger than that of the second resistor R2, the types of the second switching tube Q2 and the third switching tube Q3 are different, specifically, the first switching tube Q1 is a PNP type switching tube, the second switching tube Q2 is a PNP type switching tube, and the third switching tube Q3 is an NPN type switching tube.
The working principle of the zero-live wire communication circuit of this embodiment is as follows:
when the total resistance R6 of the communication loop is a normal value, the preset reference voltage V0 is input to the inverting input end of the comparator U, the voltage of the voltage source is divided by the fifth resistor R5 and the sixth resistor R6 to obtain the voltage V, the voltage V is higher than the voltage V under the default condition, the comparator U outputs a high level "1", the first switching tube Q1 is driven to be turned on, the second switching tube Q2 is further turned on, and the third switching tube Q3 is turned off. The second switching tube Q2 and the first resistor R1 are connected into the communication circuit, the resistance value of the first resistor R1 is larger, the current of the communication circuit in the communication circuit can be effectively reduced, and the device is prevented from being damaged by large current through the communication circuit.
When the total resistance R6 of the communication loop has a larger amplitude, the voltage of the voltage source is divided by the fifth resistor R5 and the sixth resistor R6 to obtain the voltage V, at the moment, the voltage V is higher than the voltage V0, the comparator U outputs a low level '0', the first switching tube Q1 is driven to be turned off, the second switching tube Q2 is further turned off, and the third switching tube Q3 is turned on. The third switching tube Q3 and the second resistor R2 are connected into the communication loop, the resistance value of the second resistor R2 is smaller, the situation that the current of the communication loop is too small due to the increase of the total resistance of the communication loop can be effectively avoided, the communication quality is prevented from being reduced due to the reduction of the current of the communication loop, and the communication quality is improved.
Example 5
The embodiment provides a communication system, which includes a first communication main body and a second communication main body, and is characterized by further including any one of the zero fire wire communication circuits in the embodiments 1-4, for improving the communication quality between the first communication main body and the second communication main body. The first communication main body is connected with the input end of the communication loop, and the second communication main body is connected with the output end of the communication loop. In this embodiment, the communication system is an air conditioning system, the first communication main body is an air conditioning indoor unit, and the second communication main body is an air conditioning outdoor unit.
The apparatus embodiments described above are merely illustrative, wherein the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.

Claims (9)

1.一种零火线通讯电路，其特征在于，所述电路包括：1. A zero-live communication circuit, characterized in that the circuit comprises: 逻辑运算模块，其输入端连接通讯回路的输入端，其输出端连接第一开关管的控制端，用于根据所述通讯回路的输入端输入的电压输出控制信号；所述逻辑运算模块包括：第一分压单元，其第一端连接所述通讯回路的输入端，其第二端接地，其第三端连接第一比较器的同相输入端；所述第一比较器，其反相输入端输入第一基准电压，其输出端连接所述第一开关管的控制端；与门运算器，其第一输入端连接所述第一比较器的输出端，其第二输入端连接第二比较器的输出端，其输出端连接所述第一开关管的控制端；第二分压单元，其第一端连接电压源，其第二端接地，其第三端连接所述第二比较器的反相输入端；所述第二比较器，其同相输入端输入第二基准电压；所述第二分压单元包括：串联设置的第五电阻和第六电阻，其中，所述第五电阻连接所述电压源，所述第六电阻接地，所述第五电阻与所述第六电阻之间的线路连接所述第二比较器的反相输入端，所述第五电阻为定值电阻，所述第六电阻为通讯回路的总电阻；A logic operation module, whose input end is connected to the input end of the communication loop, and whose output end is connected to the control end of the first switch tube, is used to output a control signal according to the voltage input to the input end of the communication loop; the logic operation module includes: a first voltage dividing unit, whose first end is connected to the input end of the communication loop, whose second end is grounded, and whose third end is connected to the non-inverting input end of the first comparator; the first comparator, whose inverting input end inputs a first reference voltage, and whose output end is connected to the control end of the first switch tube; an AND gate operator, whose first input end is connected to the output end of the first comparator, and whose second input end is connected to the second comparator The output end of the first switch tube is connected to the control end of the first switch tube; the second voltage dividing unit has a first end connected to the voltage source, a second end grounded, and a third end connected to the inverting input end of the second comparator; the second comparator has a non-inverting input end inputting a second reference voltage; the second voltage dividing unit comprises: a fifth resistor and a sixth resistor arranged in series, wherein the fifth resistor is connected to the voltage source, the sixth resistor is grounded, the line between the fifth resistor and the sixth resistor is connected to the inverting input end of the second comparator, the fifth resistor is a fixed resistor, and the sixth resistor is the total resistance of the communication loop; 所述第一开关管，其输入端连接电流调整模块的控制端，其输出端接地，用于根据所述控制信号改变自身的通断状态，进而控制所述电流调整模块中两个并联设置的开关支路切换导通，进而调整所述通讯回路的电流；The first switch tube, whose input end is connected to the control end of the current adjustment module and whose output end is grounded, is used to change its on-off state according to the control signal, thereby controlling the switching on of two switch branches arranged in parallel in the current adjustment module, thereby adjusting the current of the communication loop; 所述电流调整模块，设置在所述通讯回路的输入端和输出端之间。The current adjustment module is arranged between the input end and the output end of the communication loop. 2.根据权利要求1所述的零火线通讯电路，其特征在于，所述电流调整模块包括：2. The zero-live wire communication circuit according to claim 1, wherein the current adjustment module comprises: 第一开关支路，其中包括串联设置的第二开关管和第一电阻；A first switch branch, comprising a second switch tube and a first resistor arranged in series; 第二开关支路，其中包括串联设置的第三开关管和第二电阻；A second switch branch, comprising a third switch tube and a second resistor arranged in series; 所述第一电阻的阻值大于所述第二电阻的阻值，所述第二开关管和所述第三开关管的类型不同。The resistance value of the first resistor is greater than the resistance value of the second resistor, and the second switch tube and the third switch tube are of different types. 3.根据权利要求2所述的零火线通讯电路，其特征在于，所述第二开关管为PNP型开关管，所述第三开关管为NPN型开关管。3 . The zero-live wire communication circuit according to claim 2 , wherein the second switch tube is a PNP type switch tube, and the third switch tube is an NPN type switch tube. 4.根据权利要求1所述的零火线通讯电路，其特征在于，所述第一分压单元包括：4. The zero-live line communication circuit according to claim 1, wherein the first voltage dividing unit comprises: 串联设置的第三电阻和第四电阻，其中，所述第三电阻连接所述通讯回路的输入端，所述第四电阻接地，所述第三电阻与所述第四电阻之间的线路连接所述第一比较器的同相输入端。A third resistor and a fourth resistor are arranged in series, wherein the third resistor is connected to the input end of the communication loop, the fourth resistor is grounded, and the line between the third resistor and the fourth resistor is connected to the non-inverting input end of the first comparator. 5.根据权利要求1所述的零火线通讯电路，其特征在于，所述电路还包括：5. The zero-live line communication circuit according to claim 1, characterized in that the circuit further comprises: 串联设置的第七电阻和第八电阻，其中，所述第七电阻连接所述逻辑运算模块的输出端，所述第八电阻接地，所述第七电阻和第八电阻之间的线路连接所述第一开关管的控制端。A seventh resistor and an eighth resistor are arranged in series, wherein the seventh resistor is connected to the output end of the logic operation module, the eighth resistor is grounded, and the line between the seventh resistor and the eighth resistor is connected to the control end of the first switch tube. 6.一种零火线通讯电路，其特征在于，所述电路包括：6. A zero-live communication circuit, characterized in that the circuit comprises: 逻辑运算模块，其输入端连接电压源，其输出端连接第一开关管的控制端，用于根据所述零火线通讯电路的通讯回路的总电阻输出控制信号；所述逻辑运算模块包括：第二分压单元，所述第二分压单元包括串联设置的第五电阻和第六电阻，其中，所述第五电阻连接所述电压源，所述第六电阻接地，所述第五电阻与所述第六电阻之间的线路连接第二比较器的反相输入端，所述第五电阻为定值电阻，所述第六电阻为通讯回路的总电阻；A logic operation module, whose input end is connected to a voltage source, and whose output end is connected to a control end of a first switch tube, is used to output a control signal according to the total resistance of a communication loop of the zero-live communication circuit; the logic operation module comprises: a second voltage dividing unit, the second voltage dividing unit comprises a fifth resistor and a sixth resistor arranged in series, wherein the fifth resistor is connected to the voltage source, the sixth resistor is grounded, the line between the fifth resistor and the sixth resistor is connected to an inverting input end of a second comparator, the fifth resistor is a fixed value resistor, and the sixth resistor is the total resistance of the communication loop; 所述第二比较器，其同相输入端输入基准电压，其输出端连接所述第一开关管；The second comparator has a non-inverting input terminal inputting a reference voltage, and an output terminal connected to the first switch tube; 所述第一开关管，其输入端连接电流调整模块的控制端，其输出端接地，用于根据所述控制信号改变自身的通断状态，进而控制所述电流调整模块中两个并联设置的开关支路切换导通，进而调整通讯回路的电流；The first switch tube, whose input end is connected to the control end of the current adjustment module and whose output end is grounded, is used to change its on-off state according to the control signal, thereby controlling the switching on of two switch branches arranged in parallel in the current adjustment module, thereby adjusting the current of the communication loop; 所述电流调整模块，设置在所述通讯回路的输入端和输出端之间。The current adjustment module is arranged between the input end and the output end of the communication loop. 7.一种通讯系统，包括第一通讯主体和第二通讯主体，其特征在于，还包括权利要求6所述的零火线通讯电路，所述第一通讯主体连接所述通讯回路的输入端，所述第二通讯主体连接所述通讯回路的输出端。7. A communication system, comprising a first communication subject and a second communication subject, characterized in that it also comprises the zero-live wire communication circuit as described in claim 6, wherein the first communication subject is connected to the input end of the communication circuit, and the second communication subject is connected to the output end of the communication circuit. 8.一种通讯系统，包括第一通讯主体和第二通讯主体，其特征在于，还包括权利要求1至5中任一项所述的零火线通讯电路，所述第一通讯主体连接所述通讯回路的输入端，所述第二通讯主体连接所述通讯回路的输出端。8. A communication system, comprising a first communication subject and a second communication subject, characterized in that it also comprises a zero-live wire communication circuit as described in any one of claims 1 to 5, wherein the first communication subject is connected to the input end of the communication circuit, and the second communication subject is connected to the output end of the communication circuit. 9.根据权利要求7或8所述的通讯系统，其特征在于，所述通讯系统为空调系统，所述第一通讯主体为空调内机，所述第二通讯主体为空调外机。9. The communication system according to claim 7 or 8, characterized in that the communication system is an air-conditioning system, the first communication subject is an indoor unit of the air-conditioner, and the second communication subject is an outdoor unit of the air-conditioner.
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