CN215412413U - Indoor unit side communication circuit, control system and air conditioner - Google Patents
Indoor unit side communication circuit, control system and air conditioner Download PDFInfo
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- CN215412413U CN215412413U CN202121277679.0U CN202121277679U CN215412413U CN 215412413 U CN215412413 U CN 215412413U CN 202121277679 U CN202121277679 U CN 202121277679U CN 215412413 U CN215412413 U CN 215412413U
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Abstract
The application provides an indoor set side communication circuit, control system and air conditioner has related to air conditioner technical field, when having solved indoor set of air conditioner and off-premises station and using overlength electric connecting wire, the communication waveform received the interference, leads to the wrong report to go wrong problem that communication trouble appears between indoor set and the off-premises station, include: the main controller comprises a receiving end and a sending end; the current loop communication module is electrically connected with the main controller; the power supply module is electrically connected with the current loop communication module; and the detection module is electrically connected between the main controller and the current loop communication module. This application increases detection module in the indoor set side communication circuit of air conditioner, when using super long indoor outer electric connecting wire, is transmitted to through detection module filtering by the signal waveform of interference, forms smooth square wave signal, reduces the interfering signal among the communication signal to reduce the number of times of misrepresentation indoor set and off-premises station communication trouble, guarantee the communication exactness and the stability of indoor set and off-premises station.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an indoor unit side communication circuit, a control system and an air conditioner.
Background
In order to find a proper installation position of a part of existing household air conditioners, indoor units, outdoor and external electric connecting pipes and electric connecting wires are both overlong and far exceed the requirement of a set distance of 15 meters, so that when the running current of the air conditioner is large, indoor and outdoor communication faults are reported, and the air conditioner cannot run normally.
The domestic air conditioner frequency converter usually adopts zero live wire communication circuit, the circuit of constituteing by opto-coupler, triode, resistance, electric capacity, and this circuit interference killing feature is poor, when using when exceeding 15 meters indoor outer electric connecting wire, the communication waveform receives the interference, transmits the signal distortion of chip mouth, and the chip can not detect the signal, finally can lead to the wrong report to appear communication fault between indoor set and the off-premises station.
SUMMERY OF THE UTILITY MODEL
The application provides a can filtering interference among the circuit, extension communication distance, when using super long indoor outer electric connecting wire, indoor machine side communication circuit, control system and air conditioner that reduce the number of times of false positive communication trouble.
On the one hand, this application provides an indoor unit side communication circuit, includes:
the main controller comprises a receiving end and a sending end;
the current loop communication module is electrically connected with the main controller and is used for transmitting signals from the indoor unit to the outdoor unit;
the power supply module is electrically connected with the current loop communication module and is used for providing power supply for the current loop communication module;
and the detection module is electrically connected between the main controller and the current loop communication module and is used for detecting the communication signal transmitted from the indoor unit to the outdoor unit.
In a possible implementation manner of the present application, the detection module includes a first triode, a first resistor, a second resistor, and a first capacitor, a base of the first triode is electrically connected to the current loop communication module, a collector is electrically connected to a first power source through the first resistor, an emitter is grounded, one end of the second resistor is electrically connected to an electrical connection node of the first resistor and the collector of the first triode, the other end of the second resistor is electrically connected to a receiving end of the main controller, one end of the first capacitor is electrically connected to an electrical connection node of the second resistor and the main controller, and the other end of the first capacitor is grounded.
In this application, in a possible implementation manner, the current loop communication module includes a switch unit, an internal receiving unit and an internal transmitting unit which are electrically connected in sequence, the switch unit is electrically connected with a transmitting end of the main controller, and the internal transmitting unit is electrically connected with a receiving end of the main controller.
In this application, in a possible implementation, the switch unit includes second triode, third resistance and fourth resistance, the base of second triode passes through the third resistance with main control unit's sending end electricity is connected, the collecting electrode with the internal receiving unit electricity is connected, the projecting pole with the one end electricity of fourth resistance is connected, the other end of fourth resistance with the base electricity of second triode is connected.
In this application a possible implementation, including first opto-coupler, fifth resistance and sixth resistance to receiving unit, the positive pole of the inside emitting diode of first opto-coupler passes through fifth resistance is connected with the second power electricity, the negative pole of the inside emitting diode of first opto-coupler passes through sixth resistance with the collecting electrode electricity of second triode is connected, the collecting electrode of the inside photosensitive triode of first opto-coupler with send the unit electricity to and connect.
In this application, in a possible implementation manner, the internal transmission unit includes a second optocoupler, a seventh resistor, an eighth resistor and a second capacitor, the cathode and the anode of the internal light emitting diode of the second optocoupler respectively with the two ends of the seventh resistor are electrically connected, the second capacitor is electrically connected in parallel with the seventh resistor, the cathode of the internal light emitting diode of the second optocoupler is electrically connected with the collector electrode of the internal photosensitive triode of the first optocoupler, the collector electrode of the internal photosensitive triode of the second optocoupler is connected with the third power supply through the eighth resistor, and the emitter electrode of the internal photosensitive triode of the second optocoupler is grounded.
In one possible implementation manner of the present application, the current loop communication module includes a voltage stabilizing unit, the voltage stabilizing unit includes a first voltage stabilizing tube and a second voltage stabilizing tube, a cathode of the first voltage stabilizing tube is electrically connected to an anode of the internal light emitting diode of the second optocoupler and an electrical connection node of the second capacitor, an anode of the first voltage stabilizing tube is electrically connected to a cathode of the second voltage stabilizing tube, and an anode of the second voltage stabilizing tube is electrically connected to an emitter of the internal photosensitive triode of the first optocoupler.
In this application, current loop communication module includes the overcurrent protection unit, the overcurrent protection unit includes first diode, ninth resistance and thermistor, first diode anode electricity connect in the positive pole of second stabilivolt with the electricity connection node of the inside photosensitive triode's of first opto-coupler emitter, first diode cathode with the one end electricity of ninth resistance is connected, the other end and the outside communication line electricity of ninth resistance are connected, thermistor with ninth resistance parallel connection electricity is connected.
In another aspect, the present application provides a control system including the indoor unit side communication circuit.
On the other hand, the application also provides an air conditioner, and the air conditioner comprises the control system.
In the application, the detection module is additionally arranged in the indoor unit side communication circuit of the air conditioner to detect the communication signals transmitted from the indoor unit to the outdoor unit, when an ultra-long indoor and outdoor electric connecting line is used, the interfered signal waveforms are transmitted to the detection module to be filtered, smooth square wave signals are formed, interference signals in the communication signals transmitted by the current loop communication module are reduced, the number of times of misreporting the communication faults of the indoor unit and the outdoor unit is reduced, and the communication correctness and stability of the indoor unit and the outdoor unit are ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of an indoor unit side communication circuit according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiment of the application provides an indoor unit side communication circuit, a control system and an air conditioner, which are respectively described in detail below.
As shown in fig. 1, which is a schematic structural diagram of an embodiment of an indoor unit-side communication circuit in an embodiment of the present application, the indoor unit-side communication circuit includes:
a main controller 100 including a receiving end and a transmitting end;
a current loop communication module 200 electrically connected to the main controller 100, for transmitting signals from the indoor unit to the outdoor unit;
a power module 300 electrically connected to the current loop communication module 200, for providing power to the current loop communication module 200;
the detection module 400 is electrically connected between the main controller 100 and the current loop communication module 200, and is configured to detect a communication signal transmitted from the indoor unit to the outdoor unit.
In the present application, by adding the detection module 400 to the indoor Unit side communication circuit of the air conditioner, the communication signal transmitted from the indoor Unit to the outdoor Unit is detected, and when the ultra-long indoor and outdoor electrical connection line is used, the disturbed signal waveform is transmitted to the indoor and outdoor Unit, as shown in fig. 1, the receiving end of the main controller 100 is a pin denoted by RXD, and the transmitting end is a pin denoted by TXD, and the main controller 100 includes any one of a Central Processing Unit (CPU), an Electronic Control Unit (Electronic Control Unit, ECU), a Micro Control Unit (MCU), a memory protection Unit (Micro Processor Unit, MPU), and an integrated circuit Chip (System on a Chip, SOC). It is understood that in other embodiments, the master controller 100 may be other master controllers 100 that function according to circuit requirements, and the present application is not limited to the specific limitations of the master controller 100.
In another embodiment of the present application, the detection module 400 includes a first transistor Q44, a first resistor R44, a second resistor R31, and a first capacitor C19, a base of the first transistor Q44 is electrically connected to the current loop communication module 200, a collector is electrically connected to a first power source through the first resistor R44, the first power source is a +5V dc power source, or other power sources may be selected according to actual conditions, an emitter is grounded, one end of the second resistor R31 is electrically connected to an electrical connection node between the first resistor R44 and the collector of the first transistor Q44, the other end of the second resistor R31 is electrically connected to a receiving end of the main controller 100, one end of the first capacitor C19 is electrically connected to an electrical connection node between the second resistor R31 and the main controller 100, and the other end is grounded. When the current loop communication module 200 sends a communication signal to the outdoor side, the low pass detector with the above structure detects the communication signal with the frequency lower than the cut-off frequency, and filters an interference signal with the frequency higher than the cut-off frequency to make the communication signal a complete square wave signal, where the first transistor Q44, the first resistor R44, the second resistor R31, and the first capacitor C19 form a low pass detector, and the first transistor Q44 is an NPN type transistor with a model of 8050, the first resistor R44 is a pull-up resistor with a voltage of 10 kilo ohms, the second resistor R31 is a resistor with a voltage of 100 ohms, and the first capacitor C19 is a patch capacitor with a voltage of 1000 picofarads, and can be set and adjusted according to actual situations.
In another embodiment of the present application, the current loop communication module 200 includes a switch unit 201, an internal receiving unit 202, and an internal transmitting unit 203, which are electrically connected in sequence, where the switch unit 201 is electrically connected to a transmitting end of the main controller 100, and the internal transmitting unit 203 is electrically connected to a receiving end of the main controller 100.
In another embodiment of the present application, the switching unit 201 includes a second transistor Q5, a third resistor R32, and a fourth resistor R92, a base of the second transistor Q5 is electrically connected to a transmitting terminal of the main controller 100 through the third resistor R32, a collector is electrically connected to the internal receiving unit 202, an emitter is electrically connected to one end of the fourth resistor R92, and the other end of the fourth resistor R92 is electrically connected to a base of the second transistor Q5, so that a communication signal transmitted from the transmitting terminal of the main controller 100 to the internal receiving unit 202 is turned on and off by turning on and off the second transistor Q5, and interference signals in the communication signal transmitted to the internal receiving unit 202 are reduced, and specific parameters of the second transistor Q5, the third resistor R32, and the fourth resistor R92 may be set according to actual needs, and are not limited herein.
In another embodiment of the present application, the internal receiving unit 202 includes a first optical coupler CI11, a fifth resistor R11, and a sixth resistor R61, an anode of an internal light emitting diode of the first optical coupler CI11 is electrically connected to a second power source through the fifth resistor R11, the second power source is a +5V dc power source, and a power source with other values may also be selected according to actual situations, a cathode of the internal light emitting diode of the first optical coupler CI11 is electrically connected to a collector of the second transistor Q5 through the sixth resistor R61, the collector of an internal phototransistor of the first optical coupler CI11 is electrically connected to the internal transmitting unit 203, and specific parameters of the first optical coupler CI11, the fifth resistor R11, and the sixth resistor R61 may be set according to actual needs, and are not limited herein.
In another embodiment of the present application, the intra-pair transmitting unit 203 includes a second optical coupler IC12, a seventh resistor R45, an eighth resistor R46, and a second capacitor C31, a cathode and an anode of an internal light emitting diode of the second optical coupler IC12 are electrically connected to two ends of the seventh resistor R45, respectively, a second capacitor C31 is electrically connected to the seventh resistor R45 in parallel, a cathode of an internal light emitting diode of the second optical coupler IC12 is electrically connected to a collector of an internal photo transistor of the first optical coupler CI11, a collector of an internal photo transistor of the second optical coupler IC12 is electrically connected to a third power source through an eighth resistor R46, the third power source is a dc power source of +5V, or a power source with other values may be selected according to actual situations, an emitter of the internal photo transistor of the second optical coupler IC12 is grounded, specific parameters of the second optical coupler IC12, the seventh resistor R45, the eighth resistor R46, and the second capacitor C31 may be set according to actual needs, and are not limited herein.
When the communication is in indoor transmission and outdoor reception, the transmitting end TXD of the main controller 100 is set to high level, and the second optical coupler IC12 is always turned on. When a transmitting end TXD of the main controller 100 transmits a high level "1", the second optical coupler IC12 is turned on, the current loop is closed, the first optical coupler CI11 and the second optical coupler IC12 are turned on, and a receiving end RXD of the main controller 100 receives the high level "1"; if the transmitting end TXD of the main controller 100 transmits a low level "0", the second optocoupler IC12 is cut off, the current loop is disconnected, the first optocoupler CI11 and the second optocoupler IC12 are cut off, and the receiving end RXD of the main controller 100 receives the low level "0", so that transmission of communication signals from the indoor unit to the outdoor unit is realized. Similarly, the process of transmitting the communication signal from the outdoor unit to the indoor unit can be analyzed.
In another embodiment of the present application, the current loop communication module 200 includes a voltage regulator unit 204, the voltage regulator unit 204 includes a first voltage regulator DZ2 and a second voltage regulator DZ4, a cathode of the first voltage regulator DZ2 is electrically connected to an electrical connection node of an anode of an internal light emitting diode of the second optocoupler IC12 and the second capacitor C31, an anode of the first voltage regulator DZ2 is electrically connected to a cathode of the second voltage regulator DZ4, and an anode of the second voltage regulator DZ4 is electrically connected to an emitter of an internal photosensitive triode of the first optocoupler CI 11. The current loop communication module 200 is more stable through the first voltage regulator DZ2 and the second voltage regulator DZ4, and specific parameters of the first voltage regulator DZ2 and the second voltage regulator DZ4 can be set according to actual needs, which are not limited herein.
In another embodiment of the present application, the current loop communication module 200 includes an overcurrent protection unit 205, the overcurrent protection unit 205 includes a first diode D6, a ninth resistor R65 and a thermistor PTC2, an anode of the first diode D6 is electrically connected to an electrical connection node between an anode of the second voltage regulator DZ4 and an emitter of the internal photosensitive triode of the first optocoupler CI11, a cathode of the first diode D6 is electrically connected to one end of the ninth resistor R65, another end of the ninth resistor R65 is electrically connected to an external communication line, the external communication line is a pin denoted by PS in the figure and is used for being electrically connected to a current loop circuit of the outdoor unit, and the thermistor PTC2 is electrically connected to the ninth resistor R65 in parallel. The current loop communication module 200 is subjected to overcurrent protection through the first diode D6, the ninth resistor R65 and the thermistor PTC2, so that transmission of communication signals is more stable, and specific parameters of the first diode D6, the ninth resistor R65 and the thermistor PTC2 can be set according to actual needs, which is not limited herein.
In another embodiment of the present application, the power module 300 includes an eleventh resistor R63, a twelfth resistor R64, a second diode D7, a thirteenth resistor R67, a third regulator DZ1, an electrolytic capacitor E10, and a third capacitor C18, one end of the eleventh resistor R63 is electrically connected to the live line L _ OUT, the other end is electrically connected to the twelfth resistor R64, the other end of the twelfth resistor R64 is electrically connected to the anode of the second diode D7, the cathode of the second diode D7 is electrically connected to the electrical connection node between the anode of the internal light emitting diode of the second optocoupler IC12 and the second capacitor C31, one end of the thirteenth resistor R67 is electrically connected to the cathode of the second diode D7, the third regulator DZ1, the electrolytic capacitor E10, and the third capacitor C18 are all connected in parallel, specifically, one end of the third regulator DZ1, the anode of the electrolytic capacitor E10, and one end of the third capacitor C18 are electrically connected to the cathode of the second resistor R8653, the other end of the third voltage regulator tube DZ1, the cathode of the electrolytic capacitor E10 and the other end of the third capacitor C18 are all electrically connected with the zero line AC _ N. The live line L _ OUT and the zero line AC _ N are used for providing power to the indoor unit side communication circuit, the external communication line PS is a communication line between the indoor unit and the outdoor unit of the air conditioner, and specific parameters of the eleventh resistor R63, the twelfth resistor R64, the second diode D7, the thirteenth resistor R67, the third voltage-stabilizing tube DZ1, the electrolytic capacitor E10, and the third capacitor C18 may be set according to actual needs, which is not limited herein.
In another embodiment of the present application, there is provided a control system including an indoor-unit-side communication circuit.
In another embodiment of the present application, the present application further provides an air conditioner, including a control system.
The indoor unit side communication circuit, the control system and the air conditioner provided by the embodiment of the application are introduced in detail, a specific example is applied in the description to explain the principle and the implementation mode of the application, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. An indoor unit-side communication circuit, comprising:
the main controller comprises a receiving end and a sending end;
the current loop communication module is electrically connected with the main controller and is used for transmitting signals from the indoor unit to the outdoor unit;
the power supply module is electrically connected with the current loop communication module and is used for providing power supply for the current loop communication module;
and the detection module is electrically connected between the main controller and the current loop communication module and is used for detecting the communication signal transmitted from the indoor unit to the outdoor unit.
2. The indoor unit side communication circuit according to claim 1, wherein the detector module includes a first triode, a first resistor, a second resistor, and a first capacitor, a base of the first triode is electrically connected to the current loop communication module, a collector is electrically connected to a first power source through the first resistor, an emitter is grounded, one end of the second resistor is electrically connected to an electrical connection node between the first resistor and the collector of the first triode, the other end of the second resistor is electrically connected to a receiving end of the main controller, one end of the first capacitor is electrically connected to an electrical connection node between the second resistor and the main controller, and the other end of the first capacitor is grounded.
3. The indoor unit side communication circuit according to claim 1, wherein the current loop communication module includes a switch unit, an internal receiving unit, and an internal transmitting unit that are electrically connected in sequence, the switch unit is electrically connected to a transmitting end of the main controller, and the internal transmitting unit is electrically connected to a receiving end of the main controller.
4. The indoor unit side communication circuit according to claim 3, wherein the switch unit includes a second transistor, a third resistor, and a fourth resistor, a base of the second transistor is electrically connected to the transmitting terminal of the main controller through the third resistor, a collector is electrically connected to the pair of internal receiving units, an emitter is electrically connected to one end of the fourth resistor, and the other end of the fourth resistor is electrically connected to a base of the second transistor.
5. The indoor unit side communication circuit according to claim 4, wherein the pair of internal receiving units includes a first optocoupler, a fifth resistor, and a sixth resistor, an anode of an internal light emitting diode of the first optocoupler is electrically connected to the second power supply through the fifth resistor, a cathode of the internal light emitting diode of the first optocoupler is electrically connected to a collector of the second triode through the sixth resistor, and a collector of an internal phototriac of the first optocoupler is electrically connected to the pair of internal transmitting units.
6. The indoor unit side communication circuit according to claim 5, wherein the internal transmitting unit includes a second optocoupler, a seventh resistor, an eighth resistor, and a second capacitor, a cathode and an anode of an internal light emitting diode of the second optocoupler are electrically connected to both ends of the seventh resistor, respectively, the second capacitor is electrically connected to the seventh resistor in parallel, a cathode of the internal light emitting diode of the second optocoupler is electrically connected to a collector of an internal phototransistor of the first optocoupler, the collector of the internal phototransistor of the second optocoupler is electrically connected to a third power supply through the eighth resistor, and an emitter of the internal phototransistor of the second optocoupler is grounded.
7. The indoor unit side communication circuit according to claim 6, wherein the current loop communication module comprises a voltage regulator unit, the voltage regulator unit comprises a first voltage regulator tube and a second voltage regulator tube, a cathode of the first voltage regulator tube is electrically connected to an electrical connection node of an anode of an internal light emitting diode of the second optocoupler and the second capacitor, an anode of the first voltage regulator tube is electrically connected to a cathode of the second voltage regulator tube, and an anode of the second voltage regulator tube is electrically connected to an emitter of an internal photosensitive triode of the first optocoupler.
8. The indoor unit side communication circuit according to claim 7, wherein the current loop communication module includes an overcurrent protection unit, the overcurrent protection unit includes a first diode, a ninth resistor, and a thermistor, an anode of the first diode is electrically connected to an electrical connection node of an anode of the second regulator tube and an emitter of the first optocoupler internal photo-sensitive triode, a cathode of the first diode is electrically connected to one end of the ninth resistor, the other end of the ninth resistor is electrically connected to an external communication line, and the thermistor is electrically connected in parallel with the ninth resistor.
9. A control system characterized in that the control system comprises the indoor-unit-side communication circuit according to any one of claims 1 to 8.
10. An air conditioner characterized in that it comprises a control system as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121277679.0U CN215412413U (en) | 2021-06-08 | 2021-06-08 | Indoor unit side communication circuit, control system and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121277679.0U CN215412413U (en) | 2021-06-08 | 2021-06-08 | Indoor unit side communication circuit, control system and air conditioner |
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| Publication Number | Publication Date |
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| CN215412413U true CN215412413U (en) | 2022-01-04 |
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| CN202121277679.0U Active CN215412413U (en) | 2021-06-08 | 2021-06-08 | Indoor unit side communication circuit, control system and air conditioner |
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