CN109269033B - Centralized control converter and air conditioning system - Google Patents
Centralized control converter and air conditioning system Download PDFInfo
- Publication number
- CN109269033B CN109269033B CN201810943387.2A CN201810943387A CN109269033B CN 109269033 B CN109269033 B CN 109269033B CN 201810943387 A CN201810943387 A CN 201810943387A CN 109269033 B CN109269033 B CN 109269033B
- Authority
- CN
- China
- Prior art keywords
- circuit
- communication
- indoor unit
- controller
- communication protocol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention discloses a centralized control converter and an air conditioning system, relates to the field of air conditioners, and solves the problem that a centralized controller cannot simultaneously control unit indoor units and multi-connected indoor units to work. The specific scheme is as follows: the centralized control converter includes: the device comprises a first communication circuit, a second communication circuit and a control circuit; the control circuit is respectively connected with the first communication circuit and the second communication circuit, the first communication circuit is used for connecting a first indoor unit, and the first indoor unit adopts a first communication protocol for communication; the second communication circuit is used for connecting the controller and at least one second indoor unit, and the controller and the second indoor unit adopt a second communication protocol for communication; and the control circuit is used for converting the first communication protocol and the second communication protocol so as to control the first indoor unit to communicate with the controller. The embodiment of the invention is used in the working process of the indoor units with different communication protocols adopted by the controller.
Description
Technical Field
The embodiment of the invention relates to the field of air conditioners, in particular to a centralized control converter and an air conditioning system.
Background
Among the prior art, many online air conditioning system can include an off-premises station, a plurality of online indoor units and the centralized control ware of being connected with the off-premises station, and wherein, a plurality of online indoor units adopt the same kind communication protocol, and centralized control ware alright like this with every online indoor unit communication through this communication protocol, come the work of control many online indoor units.
However, if the different unit indoor units, which use different communication protocols from the multiple indoor units, are connected to the outdoor unit, the centralized controller cannot simultaneously control the unit indoor units and the multiple indoor units to operate because the centralized controller cannot realize the conversion of the different communication protocols.
Disclosure of Invention
The invention provides a centralized control converter and an air conditioning system, which solve the problem that a centralized controller cannot simultaneously control unit indoor units and multi-connected indoor units to work.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a centrally controlled converter, which may include: the device comprises a first communication circuit, a second communication circuit and a control circuit, wherein the control circuit is respectively connected with the first communication circuit and the second communication circuit. The first communication circuit is used for connecting a first indoor unit which adopts a first communication protocol for communication; the second communication circuit is used for connecting the controller and at least one second indoor unit, and the controller and the second indoor unit adopt a second communication protocol for communication; and the control circuit is used for converting the first communication protocol and the second communication protocol so as to control the first indoor unit to communicate with the controller.
With reference to the first aspect, in one possible implementation manner, the centralized control converter may further include: a third communication circuit; wherein, the control circuit is connected with the third communication circuit; and the third communication circuit is used for connecting a wire controller, and the wire controller is used for controlling the first indoor unit to work.
With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the second communication circuit is a communication data control bus (H-NET) communication circuit, and the second communication protocol is an H-NET communication protocol. The H-NET communication circuit may include: the device comprises a Bus (Bus), a terminal loop, a positive voltage protection loop, a receiving side Alternating Current (AC) coupling circuit, an MM1192 chip (1192 chip produced by Sanmei corporation), a Bus driving circuit, a transmitting side AC coupling circuit, a negative voltage protection loop and a two-way value range conversion circuit.
With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the first communication circuit and the third communication circuit are current loop communication circuits, and the first communication protocol is a current loop communication protocol. The current loop communication circuit may include: the anti-reverse connection circuit comprises an anti-reverse connection design circuit, a power supply circuit, a filtering circuit, a signal receiving side signal amplifying circuit and a signal transmitting side signal amplifying circuit.
With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the control circuit may be a single chip circuit.
With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the controller may be a centralized controller or a line controller.
In a second aspect, the present invention provides an air conditioning system that may include the centralized control converter of the first aspect or any of its possible implementations.
With reference to the second aspect, in one possible implementation manner, the air conditioning system may further include: the outdoor unit, the first indoor unit, at least one second indoor unit and the controller. The first indoor unit is communicated by adopting a first communication protocol, and the controller is communicated with the second indoor unit by adopting a second communication protocol; and the centralized control converter is used for converting the first communication protocol and the second communication protocol so as to control the first indoor unit to communicate with the controller.
With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the air conditioning system may further include: and the wire controller is used for controlling the first indoor unit to work.
In a third aspect, there is provided a centrally controlled converter comprising: at least one processor, a memory, a communication interface, and a communication bus. The processor is connected with the memory and the communication interface through the communication bus, the memory is used for storing computer execution instructions, and when the centralized control converter operates, the processor executes the computer execution instructions stored in the memory.
The centralized control converter provided by the invention can convert the first communication protocol and the second communication protocol, so that the controller can simultaneously communicate with the first indoor unit and the second indoor unit with different communication protocols through the centralized control converter, and the centralized control of the indoor units by the controller is realized.
Drawings
Fig. 1 is a schematic diagram illustrating a centralized control converter according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of a centralized control converter;
fig. 3 is a schematic diagram of an H-NET communication circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an output square wave signal of the MM1192 chip according to the embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a current loop communication circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of another air conditioning system according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating an output signal of a controller according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of another air conditioning system according to an embodiment of the present invention;
fig. 10 is a schematic diagram of an output signal of a line controller according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Fig. 1 is a centralized control converter according to an embodiment of the present invention, and as shown in fig. 1, the centralized control converter 10 may include: a first communication circuit 11, a second communication circuit 12 and a control circuit 13. The control circuit 13 is connected to the first communication circuit 11 and the second communication circuit 12, respectively.
The first communication circuit 11 is used for connecting a first indoor unit, and the first indoor unit adopts a first communication protocol for communication.
And the second communication circuit 12 is used for connecting the controller and at least one second indoor unit, and the controller and the second indoor unit adopt a second communication protocol for communication.
And the control circuit 13 is configured to convert the first communication protocol and the second communication protocol to control the first indoor unit to communicate with the controller.
Therefore, the centralized control converter can convert the first communication protocol and the second communication protocol, so that the controller can simultaneously communicate with the first indoor unit and the second indoor unit which have different communication protocols through the centralized control converter, and the centralized control of the indoor units by the controller is realized.
In the embodiment of the present invention, further, as shown in fig. 2, the centralized control converter 10 may further include: a third communication circuit 14. The control circuit 13 is connected to the third communication circuit 14.
And the third communication circuit 14 is used for connecting a wire controller, and the wire controller is used for controlling the first indoor unit to work.
In the embodiment of the present invention, further, the second communication circuit 12 may be an H-NET communication circuit or other communication circuits supported by the H-NET communication circuit, and in the embodiment of the present invention, the second communication circuit 12 is taken as an example of an H-NET communication circuit for explanation, and at this time, the corresponding second communication protocol is an H-NET communication protocol. Specifically, as shown in fig. 3, the H-NET communication circuit may include: the device comprises a bus 121, a terminal loop 122, a positive voltage protection loop 123, a receiving side AC coupling circuit 124, an MM1192 chip 125, a bus driving circuit 126, a transmitting side AC coupling circuit 127, a negative voltage protection loop 128 and a two-way value range conversion circuit 129.
The bus 121 is used for transmitting signals between the controller and the centralized control converter.
The terminal loop 122 is disposed near the controller end, and specifically is a parallel resistor-capacitor with a large resistance value, so as to reduce transmission delay caused by interference of the communication waveform to the signal.
The positive voltage protection loop 123 and the negative voltage protection loop 128 are used to ensure the normal operation of the H-NET communication circuit.
And a receiving side AC coupling circuit 124 for receiving the signal.
The MM1192 chip 125 is used for converting the communication waveform into a square wave signal, as shown in fig. 4, so as to ensure the normal transmission of the signal.
The bus driver circuit 126 is used to increase the driving capability to assist the MM1192 chip 125 in transmitting signals.
And a transmission side AC coupling circuit 127 for transmitting a signal.
And two paths of value domain conversion circuits 129, wherein one path is used for converting the square wave signal with the value of 50% output by the MM1192 chip 125 into a signal with the value of 100% which can be identified by the control circuit 13, and the other path is used for converting the signal with the value of 100% output by the control circuit 13 into a signal with the value of 50% which can be identified by the MM1192 chip 125.
Thus, when the controller sends signals to the first indoor unit and the at least one second indoor unit, the signals can be transmitted through the bus 121, received through the positive voltage protection circuit 123 and the terminal circuit 122, through the receiving side AC coupling circuit 124, and transmitted to the MM1192 chip 125, and after the MM1192 chip 125 outputs a square wave signal with a value of 50%, the signal with a value of 100% is sent to the control circuit 13 through a value range conversion circuit 129. At this time, the control circuit 13 may directly forward the received signal to at least one second indoor unit, decode the received signal using the H-NET communication protocol, and transmit the signal to the first communication circuit after converting the signal into the signal using the first communication protocol, thereby implementing the control of the controller on the first indoor unit.
Accordingly, when the centralized control converter transmits a signal to the controller, the control circuit 13 outputs a signal with a value of 100%, performs a logical operation with the transmission clock signal, converts the signal into a signal with a value of 50% through a value domain conversion circuit 129, transmits the signal to the MM1192 chip 125, increases the driving capability through the bus driving circuit 126, transmits the signal through the transmission side AC coupling circuit 127, and then reaches the first indoor unit through the negative voltage protection circuit 128 and the positive voltage protection circuit 123.
It should be noted that, in the embodiment of the present invention, a Pulse Width Modulation (PWM) analog manner is adopted to send a signal, and compared with a Serial Peripheral Interface (SPI) manner adopted to send a synchronization signal in the prior art, a transmitted signal is more stable because a communication waveform is continuous.
In the embodiment of the present invention, further, the first communication circuit 11 and the third communication circuit 14 may be a current loop communication circuit, an H-NET communication circuit, or other supported communication circuits, in the embodiment of the present invention, the first communication circuit 11 and the third communication circuit 14 are both current loop communication circuits, which is taken as an example for explanation, and at this time, the corresponding first communication protocol is a current loop communication protocol. Specifically, as shown in fig. 5, the current loop communication circuit may include: the circuit comprises an anti-reverse connection design circuit 111, a power supply circuit 112, a filter circuit 113, a receiving side signal amplification circuit 114 and a transmitting side signal amplification circuit 115.
The reverse connection prevention design circuit 111 is used for preventing the reverse connection of the power supply so as to protect the current loop communication circuit.
And a power supply circuit 112 for supplying power.
A filter loop 113 for removing filtering to smooth the communication waveform and thereby stabilize the signal.
And a reception-side signal amplification circuit 114 for amplifying the signal transmitted by the first indoor unit to a signal receivable by the control circuit 13.
And a signal transmitting side signal amplifying circuit 115 for amplifying the small signal decoded by the control circuit 13 into a signal receivable by the first indoor unit and performing voltage stabilization processing.
In the embodiment of the present invention, further, the control circuit may specifically be a single chip circuit.
In the embodiment of the present invention, further, the controller may be a centralized controller or a wire controller. When the controller is an integrated controller, the second communication circuit is connected with two or more second indoor units, and when the controller is a wire controller, the second communication circuit is connected with one second indoor unit.
Fig. 6 is an air conditioning system according to an embodiment of the present invention, and as shown in fig. 6, the air conditioning system may include: a centrally controlled converter 10 as described in any of figures 1 to 5.
In the embodiment of the present invention, further, as shown in fig. 7, the air conditioning system may further include: an outdoor unit 21, a first indoor unit 22, at least one second indoor unit 23, and a controller 24.
The outdoor unit 21 is connected to the first indoor unit 22 and the at least one second indoor unit 23, respectively, and the centralized control switch 10 is connected to the first indoor unit 22, the at least one second indoor unit 23, and the controller 24, respectively.
The first indoor unit 22 communicates with the at least one second indoor unit 23 using a first communication protocol, the controller 24 communicates with the at least one second indoor unit 23 using a second communication protocol, and the centralized control converter 10 is configured to convert the first communication protocol and the second communication protocol to control the first indoor unit 22 to communicate with the controller 24. In this way, the controller 24 can control the first indoor unit 22 and the at least one second indoor unit 23 simultaneously by controlling the switch 10 in a centralized manner.
In a specific implementation, as shown in fig. 8, when the controller 24 needs to send a signal to the first indoor unit 22 and the at least one second indoor unit 23, the controller 24 may send the signal to the centralized control converter 10 first, and the centralized control converter 10 may directly transmit the signal to the at least one second indoor unit 23, decode the signal, and send the decoded signal supporting the first communication protocol to the first indoor unit 22. The first indoor unit 22 and the at least one second indoor unit 23 can respectively send feedback signals to the centralized control switch 10 after receiving the signals, so that the centralized control switch 10 can transmit the feedback signals to the controller 24 after receiving the feedback signals sent by the at least one second indoor unit 23, so as to inform the controller 24 that the second indoor unit 23 has successfully received the signals. And, after receiving the feedback signal sent by the first indoor unit 22, the centralized control converter 10 may decode the feedback signal and send the decoded feedback signal supporting the second communication protocol to the controller 24, so as to notify the controller 24 that the first indoor unit 22 has successfully received the signal.
It should be noted that, in the embodiment of the present invention, after receiving a signal, a device may extend a preset time and then send the signal out, so as to avoid confusion of multiple signals.
In the embodiment of the present invention, further, as shown in fig. 9, the air conditioning system may further include: a line controller 25.
The centralized control converter 10 is further connected to a line controller 25, and the line controller 25 communicates with a first communication protocol to control the first indoor unit 22 to operate.
In a specific implementation, as shown in fig. 10, when the line controller 25 needs to send a signal to the first indoor unit 22, the line controller 25 may send the signal to the centralized control converter 10 first, and then the centralized control converter 10 directly transmits the signal to the first indoor unit 22. The first indoor unit 22 can send a feedback signal to the centralized control switch 10 after receiving the signal, and the centralized control switch 10 can transmit the feedback signal to the line controller 25 to notify the line controller 25 that the first indoor unit 22 has successfully received the signal. And after receiving the feedback signal sent by the first indoor unit 22, the centralized control converter 10 may further decode the feedback signal, and send the decoded feedback signal supporting the second communication protocol to the controller 24, so that the controller 24 knows the operation state of the first indoor unit 22.
In the embodiment of the present invention, when the air conditioning system includes the line controller 25, referring to fig. 8, the centralized control converter 10 may also transmit a feedback signal sent by the first indoor unit 22 to the line controller 25 after receiving the feedback signal, so that the line controller 25 knows the operation state of the first indoor unit 22.
Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A centrally controlled converter, characterized in that it comprises: the device comprises a first communication circuit, a second communication circuit and a control circuit; the control circuit is respectively connected with the first communication circuit and the second communication circuit;
the first communication circuit is used for connecting a first indoor unit, and the first indoor unit adopts a first communication protocol for communication; the first communication circuit is a current loop communication circuit, and the first communication protocol is a current loop communication protocol;
the second communication circuit is used for connecting the controller and at least one second indoor unit, and the controller and the second indoor unit adopt a second communication protocol for communication; the second communication circuit is a communication data control bus H-NET communication circuit, and the second communication protocol is an H-NET communication protocol;
the control circuit is used for converting the first communication protocol and the second communication protocol so as to control the first indoor unit to communicate with the controller.
2. The centrally controlled converter according to claim 1, further comprising: a third communication circuit; the control circuit is connected with the third communication circuit;
and the third communication circuit is used for connecting a wire controller, and the wire controller is used for controlling the first indoor unit to work.
3. The converter of claim 1, wherein the second communication circuit is a communication data control bus communication circuit, and the second communication protocol is a communication data control bus communication protocol;
the communication data control bus communication circuit includes: the device comprises a bus, a terminal loop, a positive voltage protection loop, a receiving side alternating current coupling circuit, an MM1192 chip, a bus driving circuit, a sending side alternating current coupling circuit, a negative voltage protection loop and two paths of value range conversion circuits.
4. The converter of claim 2, wherein the first communication circuit and the third communication circuit are current loop communication circuits, and the first communication protocol is a current loop communication protocol;
the current loop communication circuit includes: the anti-reverse connection circuit comprises an anti-reverse connection design circuit, a power supply circuit, a filtering circuit, a signal receiving side signal amplifying circuit and a signal transmitting side signal amplifying circuit.
5. A centrally controlled converter according to any of claims 1-3, characterized in that the control circuit is a single chip circuit.
6. The centralized control converter of claim 1, wherein the controller is a centralized controller or a line controller.
7. An air conditioning system, characterized in that it comprises a centrally controlled converter according to any of claims 1-6.
8. The air conditioning system of claim 7, further comprising: the indoor unit comprises an outdoor unit, a first indoor unit, at least one second indoor unit and a controller;
the first indoor unit is communicated by adopting a first communication protocol, and the controller is communicated with the second indoor unit by adopting a second communication protocol; the centralized control converter is used for converting the first communication protocol and the second communication protocol to control the first indoor unit to communicate with the controller; the first communication protocol is a current loop communication protocol; the second communication protocol is an H-NET communication protocol.
9. The air conditioning system according to claim 7 or 8, characterized in that the air conditioning system further comprises: and the wire controller is used for controlling the first indoor unit to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810943387.2A CN109269033B (en) | 2018-08-17 | 2018-08-17 | Centralized control converter and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810943387.2A CN109269033B (en) | 2018-08-17 | 2018-08-17 | Centralized control converter and air conditioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109269033A CN109269033A (en) | 2019-01-25 |
| CN109269033B true CN109269033B (en) | 2021-04-30 |
Family
ID=65154074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810943387.2A Active CN109269033B (en) | 2018-08-17 | 2018-08-17 | Centralized control converter and air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109269033B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974232B (en) * | 2019-03-21 | 2020-05-22 | 广东美的制冷设备有限公司 | Rapid control method and terminal of air conditioner system, air conditioner system and medium |
| CN114576828B (en) * | 2020-12-01 | 2023-12-22 | 佛山市顺德区美的电子科技有限公司 | Communication management method, bifurcation box, multi-split air conditioning system and storage medium |
| CN113251560A (en) * | 2021-05-25 | 2021-08-13 | 珠海格力电器股份有限公司 | Control method, adapter and air handling unit |
| CN114738942A (en) * | 2022-03-29 | 2022-07-12 | 青岛海尔空调电子有限公司 | Wire controller and control method and device of air conditioning system of wire controller |
| CN114893888B (en) * | 2022-05-13 | 2023-12-26 | 特灵空调系统(中国)有限公司 | Message processing method, device and medium for wire controller of air conditioner indoor unit controller |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1376351A (en) * | 1999-09-24 | 2002-10-23 | 英国电讯有限公司 | Packet network interfacing |
| CN101557332A (en) * | 2009-02-17 | 2009-10-14 | 刘利华 | Intelligent household information management system |
| CN202769881U (en) * | 2012-08-10 | 2013-03-06 | 海尔集团公司 | Air conditioning system achieving communication baud rate self-adaption |
| CN104089371A (en) * | 2014-07-02 | 2014-10-08 | 珠海格力电器股份有限公司 | Multi-split air conditioning system |
| CN105783178A (en) * | 2014-12-23 | 2016-07-20 | 青岛海尔空调电子有限公司 | Control method for air-conditioner integrated controller |
| CN106878159A (en) * | 2016-12-30 | 2017-06-20 | 中科同德（北京）生态科技有限公司 | The control method and system of connection are matched a kind of KNX intelligent gateways more |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150276252A1 (en) * | 2012-12-20 | 2015-10-01 | Mitsubishi Electric Corporation | Air conditioning system and gateway apparatus |
-
2018
- 2018-08-17 CN CN201810943387.2A patent/CN109269033B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1376351A (en) * | 1999-09-24 | 2002-10-23 | 英国电讯有限公司 | Packet network interfacing |
| CN101557332A (en) * | 2009-02-17 | 2009-10-14 | 刘利华 | Intelligent household information management system |
| CN202769881U (en) * | 2012-08-10 | 2013-03-06 | 海尔集团公司 | Air conditioning system achieving communication baud rate self-adaption |
| CN104089371A (en) * | 2014-07-02 | 2014-10-08 | 珠海格力电器股份有限公司 | Multi-split air conditioning system |
| CN105783178A (en) * | 2014-12-23 | 2016-07-20 | 青岛海尔空调电子有限公司 | Control method for air-conditioner integrated controller |
| CN106878159A (en) * | 2016-12-30 | 2017-06-20 | 中科同德（北京）生态科技有限公司 | The control method and system of connection are matched a kind of KNX intelligent gateways more |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109269033A (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109269033B (en) | Centralized control converter and air conditioning system | |
| US9934186B2 (en) | Intelligent connector and bus controller | |
| CN210327637U (en) | Protocol conversion device for air conditioner and communication system | |
| JP2005513614A (en) | Wireless data communication bus system | |
| KR20130095254A (en) | Lighting system communications apparatus and method | |
| CN214376427U (en) | Bus impedance matching circuit and bus system | |
| JP2018189466A (en) | Semiconductor device, battery monitoring system, and method for activating semiconductor device | |
| CN104124777A (en) | Wireless electric power transmission method and system | |
| CN105207785A (en) | PoE system | |
| CN104251536A (en) | One-to-many current loop communication method and communication device | |
| CN201869195U (en) | Small-sized power line communication electrical equipment | |
| CN106950890B (en) | Intelligent switch circuit based on double 485 communication | |
| JP4940764B2 (en) | Communication control device | |
| CN112202573B (en) | Two-wire system power supply and networking communication system | |
| CN213186140U (en) | MBUS host computer transmitting circuit | |
| AU2009311067A1 (en) | Master-slave mode direct current carrier communication system | |
| CN104391461A (en) | High-integration KNX (Konnex) transmission control device | |
| CN210780235U (en) | Wireless charging system for lighting device | |
| CN208937961U (en) | Mining control device with power line communication | |
| CN203243324U (en) | General power line carrier wave device | |
| CN201623714U (en) | Two-way communication circuit | |
| CN215734276U (en) | Wireless full-duplex 2.4G repeater | |
| CN210111998U (en) | Direct current carrier system and electric appliance | |
| CN201584967U (en) | Asi relay module | |
| CN111182505A (en) | Narrow-band Internet of things terminal and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |