CN111404796A - Communication device, communication assembly and vehicle-mounted air conditioner - Google Patents
Communication device, communication assembly and vehicle-mounted air conditioner Download PDFInfo
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- CN111404796A CN111404796A CN202010220505.4A CN202010220505A CN111404796A CN 111404796 A CN111404796 A CN 111404796A CN 202010220505 A CN202010220505 A CN 202010220505A CN 111404796 A CN111404796 A CN 111404796A
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- 238000002955 isolation Methods 0.000 description 8
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40013—Details regarding a bus controller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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Abstract
The invention provides a communication device, a communication assembly and a vehicle-mounted air conditioner, wherein the communication device comprises: the switching device is suitable for being connected with a data transmitting end of the designated controller, and the data transmitting end is suitable for transmitting first information; the first signal transmitter is connected with the switching device, the switching device is suitable for controlling the first signal transmitter to receive first information according to a switching control signal sent by a specified controller and loading the first information to a first communication line, the first communication line is suitable for connecting the communication device with other equipment, and the filtering component is connected to the first signal transmitter and is suitable for filtering interference signals generated in the communication device. According to the technical scheme, on one hand, communication transmission can be achieved without adopting a special level conversion chip, and on the other hand, interference signals generated in a line of the communication device are filtered by arranging the filtering component, so that interference of the communication device on other equipment is reduced.
Description
Technical Field
The invention relates to the field of drive control, in particular to a communication device, a communication assembly and a vehicle-mounted air conditioner.
Background
In the related art, the vehicle-mounted air conditioner uses a CAN (Controller Area Network) bus of the vehicle as a communication protocol, which easily causes interference to a communication system of the vehicle.
If the communication needs level conversion by using an RS485 communication cable or an RS232 communication cable, a special level conversion chip needs to be adopted, and a plurality of devices depend on common ground, and circuit isolation needs to be increased for a system needing isolation.
The communication method requires additional communication lines, which increases the manufacturing cost.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, it is an object of the invention to propose a communication device.
It is a further object of the invention to propose a communication assembly.
It is still another object of the present invention to provide a vehicle air conditioner.
A technical solution of a first aspect of the present invention provides a communication apparatus, including: the switching device is suitable for being connected with a data transmitting end of the designated controller, and the data transmitting end is suitable for transmitting first information; the first signal transmitter is connected with the switching device, the switching device is suitable for controlling the first signal transmitter to receive first information according to a switching control signal sent by a specified controller and loading the first information to a first communication line, the first communication line is suitable for connecting the communication device with other equipment, and the filtering component is connected to the first signal transmitter and is suitable for filtering interference signals generated in the communication device.
In the technical scheme, the communication device is connected with an external appointed controller through a first communication line, to receive first information sent by a data sending end of a designated controller through a first communication line, the communication device comprises a first signal transmitter and a switching device, the switching device is used for controlling the enabling of the first signal transmitter, the first information CAN be reliably received by sending the switch control signal to the switch device through the appointed controller so that the first signal transmitter CAN receive the first information, on one hand, communication transmission is not required to be carried out by adopting a CAN bus or RS485 and other communication cables, so that a special level conversion chip is not required, communication transmission can be realized, and on the other hand, through setting up filtering component, the interference signal that produces in the realization is to communication device's the circuit filters to reduce communication device to the interference of other equipment.
The designated controller may be a main controller of a main device in which the communication apparatus is located, and the first information may be a control instruction or the like sent by the main controller.
In the above technical solution, the method further comprises: and the second signal transmitter is suitable for being connected with a data receiving end of the designated controller and sending second information to the data receiving end through a second communication line, wherein the filtering component is arranged between the first signal transmitter and the second signal transmitter.
In the technical scheme, a second signal transmitter is further arranged and arranged in parallel with the first signal transmitter, the second signal transmitter is used for sending second information to the appointed controller, signal interaction between the communication device and the appointed controller is achieved by arranging the first signal transmitter and the second signal transmitter, and signal isolation between the communication device and other transmission devices can be achieved.
The second information may be information generated by the communication device or information transmitted to the communication device by other communication equipment, and the information is transmitted to the data receiving end of the designated controller through the second signal transmitter.
Specifically, the communication line can use a current as the information carrier, for example, when a current flows, the information to be transmitted is regarded as 1 (or 0), and when no current flows, the information to be transmitted is regarded as 0
(or 1).
In any one of the above technical solutions, the method further includes: the power supply circuit is suitable for being connected with a power supply source and supplying power to the first signal transmitter and the second signal transmitter; and the protection component is arranged between the power supply line and the first communication line and is respectively connected with the first signal transmitter and the second signal transmitter, and the protection component is suitable for protecting the first signal transmitter and the second signal transmitter.
In the technical scheme, the protection component is further arranged in the communication device, so that the first signal transmitter and the second signal transmitter are protected, and the reliability of the communication device in the operation process is improved.
In any one of the above technical solutions, the protection component includes a first resistor, a first diode and a second diode connected in series.
In this embodiment, the first diode D5 is used to prevent the first signal transmitter and the second signal transmitter from being damaged when the power supply is reversely connected.
The first resistor R20 is a current limiting resistor to prevent damage caused by excessive current flowing through the first signal transmitter and the second signal transmitter.
The second diode D3 is used for voltage clamp protection of the first signal transmitter and the second signal transmitter.
In any of the above technical solutions, a cathode of the first diode is connected to the first communication line, an anode of the first diode is connected to one end of the first resistor, the other end of the first resistor is connected to an anode of the first signal transmitter and an anode of the second diode, respectively, and a cathode of the second diode is connected to the second signal transmitter.
In the technical scheme, the first diode and the first resistor are respectively connected with the power supply line and the second signal transmitter to realize device protection.
In any of the above technical solutions, one end of the first resistor is connected to the power supply line, the other end of the first resistor is connected to the anode of the first diode, the cathode of the first diode is respectively connected to the cathode of the second diode and the second signal transmitter, and the anode of the second diode is connected to the first signal transmitter.
In the technical scheme, the first diode and the first resistor are respectively connected with the power supply line and the second signal transmitter to realize device protection.
In any one of the above technical solutions, the first signal transmitter includes a first optical coupler, the first optical coupler includes a first light emitter and a first light receiver, the second signal transmitter includes a second optical coupler, the second optical coupler includes a second light emitter and a second light receiver, the first light receiver is connected to the first communication line and the second light emitter respectively, and the second light emitter is further connected to the power supply line.
In the technical scheme, both the first signal transmitter and the second signal transmitter can be optical couplers, on one hand, the first optical coupler and the second optical coupler can realize unidirectional transmission of electric signals, on the other hand, the light emitters in the first optical coupler and the second optical coupler are used as input ends, the light receivers are used as output ends, and good isolation effect is achieved between the input ends and the output ends, so that interference signals in a circuit can be further reduced.
Specifically, the first light emitter and the second light emitter can both be light emitting diodes, and for the first optical coupler, the on-off of the first light emitter is controlled through the switch device.
And for the second optical coupler, when the second optical coupler receives the second information and the second communication line is conducted, the light emitting diode in the second optical coupler conducts and emits light information to the secondary side, and the secondary side is conducted to transmit the second information to the designated controller.
In addition, for the protection component, the first diode D5 is used to prevent damage to the first optocoupler and the second optocoupler when the power supply is reversely connected.
The first resistor R20 is a current limiting resistor to prevent damage when the current flowing through the first and second optocouplers is too large.
The second diode D3 is used for voltage clamp protection of the first and second optocouplers.
In any one of the above technical solutions, the switching device includes a power switching tube, an anode of the first light emitter is connected to the coupler power supply through the second resistor, a cathode of the first light emitter is connected to an input electrode of the power switching tube, an output electrode of the power switching tube is grounded, and a controlled electrode of the power switching tube is connected to the data sending end; the first end of the second light receiver is connected to the data receiving end, and the second end of the second light receiver is grounded.
In any one of the above technical solutions, the method further includes: and the third resistor is arranged between the first light receiver and the second light emitter, and the second resistor is suitable for preventing the second light emitter from being conducted by mistake.
In this embodiment, the third resistor R15 is used to raise the current threshold of the second optocoupler, the forward voltage drop Uf of the second optocoupler is 1.137V, and when the current is less than Ir2 which is 1.137/1K which is 1.137mA (if R15 which is 1K Ω), the current does not flow through the second optocoupler, thereby preventing the second optocoupler from being turned on by mistake.
In any one of the above solutions, the filtering component includes: and the fourth resistor and the first capacitive element which are connected in series are arranged between the power supply line and the first communication line.
In the technical scheme, an anti-interference circuit is constructed by adopting the fourth resistor and the first capacitive element so as to filter a fluctuation signal and/or other high-frequency signals generated by a high-frequency power supply and reduce interference signals in the transmission process.
In any one of the above technical solutions, the filter assembly further includes: and one end of the second capacitive element is connected to the first signal transmitter, and the other end of the second capacitive element is connected to the second signal transmitter.
In this technical solution, the second capacitive element C9 is a high-frequency filter capacitor to filter out high-frequency interference in the circuit.
An aspect of the second aspect of the present invention provides a communication assembly, including: a plurality of communication devices and a power supply source are defined in the technical scheme of the first aspect, and are suitable for supplying power to the plurality of communication devices, wherein any two communication devices are connected through a first communication line, and at least one communication device is connected with a designated controller through a second communication line.
In the technical scheme, the plurality of communication devices are arranged in series, only one second communication line is needed to be connected between two connected communication devices, on one hand, a special level conversion chip is not needed to be arranged, and therefore the preparation cost can be saved, on the other hand, the communication devices have strong anti-jamming capability, and therefore circuit isolation is not needed to be added between the communication devices.
A third aspect of the present invention provides a vehicle-mounted air conditioner, including: a communication device as defined in the solution of the first aspect of the invention, and/or a communication assembly as defined in the solution of the second aspect of the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic block diagram of a communication device according to an embodiment of the invention;
fig. 2 shows a circuit schematic of a communication device according to an embodiment of the invention;
fig. 3 shows a circuit schematic of a communication apparatus according to another embodiment of the invention;
FIG. 4 shows a circuit schematic of a communication assembly according to one embodiment of the invention;
fig. 5 shows a circuit schematic of a communication assembly according to another embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, a communication apparatus 10 according to an embodiment of the present invention includes: a switching device 104 adapted to be connected to a data transmitting terminal of the designated controller 20, the data transmitting terminal being adapted to transmit the first information; a first signal transmitter 102 connected to the switching device 104, the switching device 104 being adapted to control the first signal transmitter 102 to receive the first information and load the first information onto a first communication line according to a switching control signal sent by the designated controller 20, the first communication line being adapted to connect the communication apparatus 10 to other devices, a filtering component 108 connected to the first signal transmitter 102, the filtering component 108 being adapted to filter an interference signal generated in the communication apparatus 10.
In this embodiment, the communication device 10 is connected to an external designation controller 20 through a first communication line, to receive first information transmitted by a data transmitting end of the designated controller 20 through a first communication line, the communication apparatus 10 includes a first signal transmitter 102 and a switching device 104, the switching device 104 is configured to control the first signal transmitter 102 to be enabled, the first information CAN be reliably received by sending the switch control signal to the switch device 104 through the designated controller 20, so that the first signal transmitter 102 CAN receive the first information, and on one hand, communication transmission is not required to be performed by using a communication cable such as a CAN bus or RS485, and therefore, a special level conversion chip is not required, namely, communication transmission can be realized, and on the other hand, by providing the filtering component 108, interference signals generated in the line of the communication device 10 are filtered out, so as to reduce interference of the communication device 10 to other devices.
The designated controller 20 may be a main controller of a main device in which the communication apparatus 10 is located, and the first information may be a control instruction or the like transmitted by the main controller 20.
In the above embodiment, the method further includes: a second signal transmitter 106 adapted to be connected to the data receiving end of the designated controller 20, wherein the second signal transmitter 106 is adapted to transmit the second information to the data receiving end through a second communication line, and wherein the filtering component 108 is disposed between the first signal transmitter 102 and the second signal transmitter 106.
In this embodiment, a second signal transmitter 106 is further provided, the second signal transmitter 106 is arranged in parallel with the first signal transmitter 102, the second signal transmitter 106 is used for sending the second information to the designated controller 20, and by arranging the first signal transmitter 102 and the second signal transmitter 106, signal interaction between the communication device 10 and the designated controller 20 is realized, and signal isolation between the communication device and other transmission devices can be realized.
The second information may be information generated by the communication apparatus 10 or information transmitted to the communication apparatus 10 by other communication devices, and the information is transmitted to the data receiving end of the designated controller 20 through the second signal transmitter 106.
Specifically, the communication line can use a current as the information carrier, for example, when a current flows, the information to be transmitted is regarded as 1 (or 0), and when no current flows, the information to be transmitted is regarded as 0
(or 1).
In any of the above embodiments, further comprising: the power supply circuit is suitable for being connected with a power supply source and supplying power to the first signal transmitter and the second signal transmitter; and the protection component is arranged between the power supply line and the first communication line and is respectively connected with the first signal transmitter and the second signal transmitter, and the protection component is suitable for protecting the first signal transmitter and the second signal transmitter.
In this embodiment, the protection component is further arranged in the communication device, so that the first signal transmitter and the second signal transmitter are protected, and the reliability of the communication device in the operation process is improved.
In any of the above embodiments, the protection device includes a first resistor R20, a first diode D5, and a second diode D3 connected in series.
In this embodiment, the first diode D5 is used to prevent damage to the first signal transmitter and the second signal transmitter when the power supply is reversely connected.
The first resistor R20 is a current limiting resistor to prevent damage caused by excessive current flowing through the first signal transmitter and the second signal transmitter.
The second diode D3 is used for voltage clamp protection of the first signal transmitter and the second signal transmitter.
For distinguishing the circuit configurations in fig. 2 and 3, the communication device 10 in fig. 2 is represented by a communication device 10', and the communication device 10 in fig. 3 is represented by a communication device 10 ″.
As shown in fig. 2, in any of the above embodiments, the cathode of the first diode D5 is connected to the first communication line, the anode of the first diode D5 is connected to one end of the first resistor R20, the other end of the first resistor R20 is connected to the anodes of the first and second diodes D3, respectively, and the cathode of the second diode D3 is connected to the second signal transmitter.
In this embodiment, the first diode D5 and the first resistor R20 are connected to the power supply line and the second signal transmitter, respectively, to achieve device protection.
As shown in fig. 3, in any of the above embodiments, one end of the first resistor R20 is connected to the power supply line, the other end of the first resistor R20 is connected to the anode of the first diode D5, the cathode of the first diode D5 is connected to the cathode of the second diode D3 and the second signal transmitter, respectively, and the anode of the second diode D3 is connected to the first signal transmitter.
In this embodiment, the first diode D5 and the first resistor R20 are connected to the power supply line and the second signal transmitter, respectively, to achieve device protection.
In any of the above embodiments, the first signal transmitter includes the first photo-coupler IC5, the first photo-coupler IC5 includes the first light emitter and the first light receiver, the second signal transmitter includes the second photo-coupler IC3, the second photo-coupler IC3 includes the second light emitter and the second light receiver, the first light receiver is connected to the first communication line and the second light emitter, respectively, and the second light emitter is further connected to the power supply line.
In this embodiment, both the first signal transmitter and the second signal transmitter may be optical couplers, on one hand, the first optical coupler IC5 and the second optical coupler IC3 can realize unidirectional transmission of electrical signals, and on the other hand, the light emitter in the first optical coupler IC5 and the second optical coupler IC3 serves as an input end, the light receiver serves as an output end, and the input end and the output end have good isolation, so that interference signals in the circuit can be further reduced.
Specifically, the first light emitter and the second light emitter may both be light emitting diodes, and for the first photo-coupler IC5, the on/off of the first light emitter is controlled by a switching device.
With respect to the second photo-coupler IC3, when the second photo-coupler IC3 receives the second information and the second communication line is turned on, the light emitting diode in the second photo-coupler IC3 is turned on to emit light information to the secondary side, and the secondary side is turned on to transmit the second information to the designated controller.
In addition, for the protection component, the first diode D5 is used to prevent damage to the first optocoupler IC5 and the second optocoupler IC3 when the power supply is reversely connected.
The first resistor R20 is a current limiting resistor, and prevents damage caused by excessive current flowing through the first optocoupler IC5 and the second optocoupler IC 3.
The second diode D3 is used for voltage clamp protection of the first optocoupler IC5 and the second optocoupler IC 3.
In any of the above embodiments, the switching device includes a power switch tube, the anode of the first light emitter is connected to the coupler power supply through the second resistor R17, the cathode of the first light emitter is connected to the input pole of the power switch tube, the output pole of the power switch tube is grounded, and the controlled pole of the power switch tube is connected to the data sending end; the first end of the second light receiver is connected to the data receiving end, and the second end of the second light receiver is grounded.
In any of the above embodiments, further comprising: and a third resistor R15 arranged between the first light receiver and the second light emitter, wherein the second resistor is suitable for preventing the second light emitter from being conducted by mistake.
In this embodiment, the third resistor R15 is used to raise the current threshold of the second optocoupler IC3, and the forward voltage drop Uf of the second optocoupler IC3 is 1.137V.
When the current is less than Ir2 (1.137/1K) 1.137mA (if R15 is 1K Ω), the current does not flow through the second optocoupler IC3, and the second optocoupler IC3 can be prevented from being turned on by mistake.
In any of the above embodiments, the filtering assembly comprises: the fourth resistor R13 and the first capacitive element C10 connected in series are arranged between the power supply line and the first communication line.
In the embodiment, the fourth resistor and the first capacitive element are adopted to construct an anti-jamming circuit so as to filter fluctuating signals and/or other high-frequency signals generated by a high-frequency power supply and reduce interference signals in the transmission process.
In any of the above embodiments, the filtering assembly further comprises: and a second capacitive element C9, one end of the second capacitive element being connected to the first signal transmitter and the other end of the second capacitive element being connected to the second signal transmitter.
In this embodiment, the second capacitive element C9 is a high frequency filter capacitor to filter out high frequency interference in the circuit.
A communication assembly according to an embodiment of the invention, comprising: a plurality of communication devices as defined in an embodiment of the first aspect, a power supply source adapted to supply power to the plurality of communication devices, wherein any two communication devices are connected by a first communication line, and at least one communication device is connected with a designated controller by a second communication line.
In this embodiment, a plurality of communication devices are arranged in series, and two connected communication devices are connected by only one second communication line, so that on one hand, a dedicated level conversion chip is not required to be arranged, and therefore, the preparation cost can be saved, and on the other hand, the communication devices have strong anti-jamming capability, and therefore, circuit isolation is not required to be added between the communication devices.
As shown in fig. 4, the communication device 10A and the communication device 10B are connected to each other, and include 2 communication devices.
As shown in fig. 5, the number of communication devices is 4, and communication device 10C, communication device 10D, and communication device 10E are connected to communication device 10F in this order.
An in-vehicle air conditioner according to an embodiment of the present invention includes: a communication device as described in the above embodiments, and/or a communication component as described in the above embodiments.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", and "front" are used herein,
The directions or positional relationships indicated by "rear" and the like are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be configured and operated in a specific direction, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In addition, a plurality described in the present application is specifically at least two.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A communication apparatus, wherein the communication apparatus is connected to a specified controller, the communication apparatus comprising:
the switching device is suitable for being connected with a data transmitting end of the designated controller, and the data transmitting end is suitable for transmitting first information;
a first signal transmitter connected to the switching device, the switching device being adapted to control the first signal transmitter to receive the first information and load the first information onto a first communication line adapted to connect the communication apparatus with other devices according to a switching control signal transmitted from the designated controller,
a filtering component connected to the first signal transmitter, the filtering component adapted to filter an interference signal generated in the communication device.
2. The communication device of claim 1, further comprising:
a second signal transmitter adapted to be connected to a data receiving end of the designated controller, the second signal transmitter being adapted to transmit second information to the data receiving end through a second communication line,
the filtering component is arranged between the first signal transmitter and the second signal transmitter.
3. The communication device of claim 2, further comprising:
the power supply line is suitable for being connected with a power supply source and supplying power to the first signal transmitter and the second signal transmitter;
and the protection component is arranged between the power supply line and the first communication line and is respectively connected with the first signal transmitter and the second signal transmitter, and the protection component is suitable for protecting the first signal transmitter and the second signal transmitter.
4. The communication device of claim 3,
the protection component comprises a first resistor, a first diode and a second diode which are connected in series.
5. The communication device of claim 4,
the cathode of the first diode is connected to the first communication line, the anode of the first diode is connected to one end of the first resistor, the other end of the first resistor is connected to the anodes of the first signal transmitter and the second diode respectively, and the cathode of the second diode is connected to the second signal transmitter.
6. The communication device of claim 4,
one end of the first resistor is connected to the power supply line, the other end of the first resistor is connected to the anode of the first diode, the cathode of the first diode is respectively connected to the cathode of the second diode and the second signal transmitter, and the anode of the second diode is connected to the first signal transmitter.
7. The communication device according to claim 6, wherein the first signal transmitter includes a first optical coupler including a first light emitter and a first light receiver, the second signal transmitter includes a second optical coupler including a second light emitter and a second light receiver,
the first light receiver is connected to the first communication line and the second light emitter respectively, and the second light emitter is further connected to the power supply line.
8. The communication apparatus of claim 7, wherein the switching device comprises a power switch,
the positive electrode of the first light emitter is connected to a coupler power supply through a second resistor, the negative electrode of the first light emitter is connected to the input electrode of the power switch tube, the output electrode of the power switch tube is grounded, and the controlled electrode of the power switch tube is connected to the data sending end;
the first end of the second light receiver is connected to the data receiving end, and the second end of the second light receiver is grounded.
9. The communications device of claim 8, further comprising:
and a third resistor disposed between the first light receiver and the second light emitter, wherein the second resistor is adapted to prevent the second light emitter from being turned on by mistake.
10. The communication device according to any of claims 4 to 9, wherein the filtering component comprises:
and the fourth resistor and the first capacitive element are connected in series and are arranged between the power supply line and the first communication line.
11. The communication device of any of claims 2 to 9, wherein the filtering component further comprises:
a second capacitive element having one end connected to the first signal transmitter and the other end connected to the second signal transmitter.
12. A communications assembly, comprising:
a plurality of communication devices according to any one of claims 1 to 11;
a power supply adapted to supply power to a plurality of the communication devices,
any two communication devices are connected through a first communication line, and at least one communication device is connected with a designated controller through a second communication line.
13. An in-vehicle air conditioner, characterized by comprising:
the communication device of any one of claims 1 to 11, and/or
The communication assembly of claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010220505.4A CN111404796A (en) | 2020-03-25 | 2020-03-25 | Communication device, communication assembly and vehicle-mounted air conditioner |
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| CN102324952A (en) * | 2011-09-30 | 2012-01-18 | 深圳麦克维尔空调有限公司 | Non-polar two-line system communication circuit |
| CN203364345U (en) * | 2013-07-05 | 2013-12-25 | Tcl空调器(中山)有限公司 | Communication circuit of frequency conversion air conditioner and frequency conversion air conditioner |
| CN109764503A (en) * | 2019-01-15 | 2019-05-17 | 海信（广东）空调有限公司 | Outdoor power supply control circuit of air conditioner and air conditioner |
| CN110318632A (en) * | 2018-03-30 | 2019-10-11 | 松下电气机器（北京）有限公司 | The controller of automatically-controlled door |
| CN110417400A (en) * | 2019-07-16 | 2019-11-05 | 惠州市蓝微电子有限公司 | A kind of isolation communicating circuit, system and method |
| CN110762808A (en) * | 2019-10-31 | 2020-02-07 | 广东美的制冷设备有限公司 | Drive control circuit and air conditioner |
| CN110830026A (en) * | 2019-11-28 | 2020-02-21 | 广东美的暖通设备有限公司 | Optical coupling isolation communication circuit, circuit board and air conditioner |
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| CN102324952A (en) * | 2011-09-30 | 2012-01-18 | 深圳麦克维尔空调有限公司 | Non-polar two-line system communication circuit |
| CN203364345U (en) * | 2013-07-05 | 2013-12-25 | Tcl空调器(中山)有限公司 | Communication circuit of frequency conversion air conditioner and frequency conversion air conditioner |
| CN110318632A (en) * | 2018-03-30 | 2019-10-11 | 松下电气机器（北京）有限公司 | The controller of automatically-controlled door |
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Application publication date: 20200710 |