CN101359826A - Novel communication protecting equipment - Google Patents
Novel communication protecting equipment Download PDFInfo
- Publication number
- CN101359826A CN101359826A CNA2007100445359A CN200710044535A CN101359826A CN 101359826 A CN101359826 A CN 101359826A CN A2007100445359 A CNA2007100445359 A CN A2007100445359A CN 200710044535 A CN200710044535 A CN 200710044535A CN 101359826 A CN101359826 A CN 101359826A
- Authority
- CN
- China
- Prior art keywords
- relay
- circuit
- protective circuit
- chip microcomputer
- communication
- 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.)
- Granted
Links
Images
Abstract
Disclosed is a novel communication protective device, comprising: three parts including a testing circuit, a protective circuit and a single chip microcomputer. When the two inputs of the communication protective circuit are normal connection of outdoor RS-485 communications, the testing circuit has no output, the single chip microcomputer has no output protection signal, a relay operates attractingly (normally open contact attraction), and indoor and outdoor communications are connected directly through the relay and conduct normal communications; when the input of the communication protective circuit is in connection with a power supply, the relay of the protective circuit does not operate (normally closed contact attraction), the protective circuit sends out a test signal and informs the single chip microcomputer to send out a protective signal which can make the relay stay in the normally closed contact attraction state and make the power supply signal not being connected with an indoor RS-485 communication circuit, and can realize protection to the 485 communication circuit. The device can realize protection to the 485 communication circuit by a main use of just one relay, the control device is simple-structured and the increasing of components and parts is less, but the reliability and safety are greatly improved.
Description
Technical field
The present invention relates to a kind of communication protecting equipment, especially a kind of indoor and outdoor communication protecting equipment that can be applicable in the convertible frequency air-conditioner.
Background technology
Now, along with the enhancing of people's awareness of saving energy, the application of convertible frequency air-conditioner more and more widely.Usually the convertible frequency air-conditioner indoor and outdoor machine mostly adopts 485 stronger communication modes of antijamming capability, because 485 connections have two, and power line also has two, and the wiring that therefore very easily makes the mistake in indoor and outdoor machine is linked and packed process produces dangerous.In order effectively to prevent danger and to protect communicating circuit, be badly in need of a kind of simple and effective communication protective circuit of design.
Summary of the invention
The objective of the invention is to be the shortcoming that exists at above prior art to propose a kind of simple and effective novel communication protecting equipment, the wiring of avoiding making the mistake in the process of being linked and packed, produce dangerous, the protection communicating circuit.
For reaching above purpose, solution of the present invention is:
Novel communication protecting equipment, comprise: testing circuit, protective circuit and single-chip microcomputer three parts, when two of communication protective circuit are input as the normal connection of outdoor pusher side 485 communications, the testing circuit no-output, single-chip microcomputer does not have the output protection signal yet, relay adhesive action (normally opened contact adhesive), indoor and outdoor communication directly connect by relay and carry out normal communication; When the input of communication protective circuit connects power supply; the relay of protective circuit be failure to actuate (normally-closed contact adhesive); the protective circuit output detection signal; notify single-chip microcomputer output protection signal simultaneously; make relay be in the normally-closed contact attracting state; make power supply signal can not be connected to 485 communicating circuits of indoor pusher side, realized protection 485 communicating circuits.
Further, protective circuit mainly is made of a relay, the 485 communications input of the outer pusher side of junction chamber of two inputs of protective circuit, and another input connects single-chip microcomputer, receives the protection action command signal of single-chip microcomputer; The input of pusher side 485 communications in junction chamber of two outputs of protective circuit, another output of protective circuit connects single-chip microcomputer by testing circuit, exports to single-chip microcomputer protection action command signal.
Protective circuit also comprises the negative circuit of being made up of resistance and triode, and two ends apply the 12V forward voltage, and relay is parallel to resistance.
The protective circuit input signal is a high level, the conducting of negative circuit triode, relay adhesive action; Otherwise, then not conducting of triode of low level, relay is failure to actuate.
Testing circuit can be made up of optical coupler, resistance, electric capacity, and two resistance are in series with relay respectively, and series connection one electric capacity forms the loop between these two resistance.The 3rd resistance and optical coupler are in series, and apply the 5V forward voltage at two ends; The optical coupler other end is in parallel with electric capacity.
When two of communication protective circuit were input as the normal connection of outdoor pusher side 485 communications, AC detection circuit output was high level always; When the input of communication protective circuit connected AC power, AC detection circuit was output as the pulse signal of power frequency supply frequency twice.
Because the present invention has mainly only used a relay can realize protection to 485 communicating circuits; therefore compared with prior art; control device structure of the present invention is comparatively simple, and the components and parts increase is less, but reliability and security has really obtained improving greatly.
Description of drawings
Syndeton schematic diagram when Fig. 1 uses for invention.
Fig. 2 is the circuit theory diagrams of a kind of embodiment of structure of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
The communication protective circuit principle of device of present embodiment is made of jointly protective circuit, testing circuit and single-chip microcomputer as shown in Figure 2.Wherein, protective circuit is made up of relay (RY1) and negative circuit (Q1, R4), and testing circuit is by light idol (PC1), electric capacity (C1) and resistance (R1～R3) form.
This negative circuit comprises resistance R 4 and triode Q1, and two ends apply the 12V forward voltage, and relay R Y1 is parallel to resistance R 4.
Testing circuit comprises optical coupler, resistance, electric capacity, and resistance R 1, R2 are in series with relay respectively, and series connection one capacitor C 1 forms the loop between resistance R 1, R2.Resistance R 3 is in series with optical coupler, and applies the 5V forward voltage at two ends.The optical coupler other end is in parallel with electric capacity.
Power on the initial stage in system ,+12V and+5V almost power on simultaneously with system, and single-chip microcomputer is started working, and during the scm software initialization, the AC_PROTECT end is changed to " low " level earlier, promptly thinks earlier to need protection.After waiting for special time, can not think and do not need protection if testing circuit has feedback, make the AC_PROTECT end put " height " level again, make protective circuit enter the normal communication state; As if testing circuit signal output is arranged, what then think connection is AC power, single-chip microcomputer output protection signal, and the AC_PROTECT end is " low " level, the AC power maintenance is connected with testing circuit, makes protective circuit be in stable state.
The operation principle of protective circuit is as follows: when the AC_PROTECT input signal is " height " level, and the Q1 conducting, RY1 adhesive action, the outside communication signal directly is connected with the indoor communication signal, carries out normal communication; When the AC_PROTECT input signal was " low " level, Q1 closed, and RY1 is failure to actuate, and the outside input signal directly is connected with testing circuit, and the communicating circuit of indoor is protected.
The operation principle of testing circuit is as follows: when the normal communication signal outside the input junction chamber of protective circuit, and RY1 adhesive action, AC detection circuit does not have input, and its output is " height " level at this moment always; When the input of protective circuit connects ac supply signal; RY1 is failure to actuate; testing circuit directly connects AC power; its output is that frequency is the pulse signal of power frequency supply frequency twice at this moment; after single-chip microcomputer receives this signal; control AC_PROTECT makes it be output as " low " level, and then makes relay be in normally off, has realized the protection to communicating circuit.
As seen, connect under the normal situation at connection, the testing circuit no-output, single-chip microcomputer does not have the output protection signal yet, relay adhesive this moment action, the communicating circuit of the direct junction chamber of outside communicating circuit inboard like this; Be connected at connection under the situation of AC power; testing circuit detects and outputs signal to single-chip microcomputer, and single-chip microcomputer output protection signal is failure to actuate relay; the outside ac supply signal has been connected to AC detection circuit like this, and makes this protective circuit be in stable state.
Because the present invention only increases and used a relay, therefore, circuit design is simpler, and used device is less, cost economy, and improved reliability and security greatly.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (4)
1, novel communication protecting equipment, it is characterized in that: comprise testing circuit, protective circuit and single-chip microcomputer three parts, when two of communication protective circuit are input as the normal connection of outdoor pusher side 485 communications, the testing circuit no-output, single-chip microcomputer does not have the output protection signal yet, relay adhesive action, indoor and outdoor communication directly connect by relay and carry out normal communication; When the input of communication protective circuit connects power supply; the relay of protective circuit is failure to actuate, and the protective circuit output detection signal is notified single-chip microcomputer output protection signal simultaneously; make relay be in the normally-closed contact attracting state, make power supply signal can not be connected to 485 communicating circuits of indoor pusher side.
2, novel communication protecting equipment as claimed in claim 1, it is characterized in that: this protective circuit mainly is made of a relay, the 485 communications input of the outer pusher side of junction chamber of two inputs of protective circuit, another input connects single-chip microcomputer, receives the protection action command signal of single-chip microcomputer; The input of pusher side 485 communications in junction chamber of two outputs of protective circuit, another output of protective circuit connects single-chip microcomputer by testing circuit, exports to single-chip microcomputer protection action command signal.
3, novel communication protecting equipment as claimed in claim 1 is characterized in that: this protective circuit also comprises the negative circuit of being made up of resistance and triode, and two ends apply the 12V forward voltage, and relay is parallel to resistance; The protective circuit input signal is a high level, the conducting of negative circuit triode, relay adhesive action; Otherwise, then not conducting of triode of low level, relay is failure to actuate.
4, novel communication protecting equipment as claimed in claim 1 is characterized in that: this testing circuit mainly is made up of optical coupler, resistance, electric capacity, and two resistance are in series with relay respectively, and series connection one electric capacity forms the loop between these two resistance; The 3rd resistance and optical coupler are in series, and apply the 5V forward voltage at two ends; The optical coupler other end is in parallel with electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710044535 CN101359826B (en) | 2007-08-03 | 2007-08-03 | Communication protecting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710044535 CN101359826B (en) | 2007-08-03 | 2007-08-03 | Communication protecting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101359826A true CN101359826A (en) | 2009-02-04 |
| CN101359826B CN101359826B (en) | 2013-04-10 |
Family
ID=40332193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710044535 Expired - Fee Related CN101359826B (en) | 2007-08-03 | 2007-08-03 | Communication protecting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101359826B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195283A (en) * | 2010-03-03 | 2011-09-21 | 华为终端有限公司 | Terminal product and safety protection method thereof |
| CN106877308A (en) * | 2017-03-22 | 2017-06-20 | 珠海格力电器股份有限公司 | Single phase power supply unit and its control method |
| CN110154676A (en) * | 2019-05-05 | 2019-08-23 | 广东美的制冷设备有限公司 | Air-conditioning indoor and outdoor machine Wiring detection method, air condition with camion and its power supply unit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006057221A1 (en) * | 2004-11-29 | 2006-06-01 | Daikin Industries, Ltd. | Air conditioner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079149C (en) * | 1998-10-23 | 2002-02-13 | 清华同方股份有限公司 | Microcomputer controller for frequency-conversion air-conditioning system |
| CN1871786B (en) * | 2003-10-21 | 2013-11-20 | 松下电器产业株式会社 | Facilities equipment communication circuit |
| CN2689105Y (en) * | 2004-01-12 | 2005-03-30 | 广东新的科技集团有限公司 | Control system for outdoor unit of air cooling tubular air conditioner with several indoor units |
-
2007
- 2007-08-03 CN CN 200710044535 patent/CN101359826B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006057221A1 (en) * | 2004-11-29 | 2006-06-01 | Daikin Industries, Ltd. | Air conditioner |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195283A (en) * | 2010-03-03 | 2011-09-21 | 华为终端有限公司 | Terminal product and safety protection method thereof |
| CN106877308A (en) * | 2017-03-22 | 2017-06-20 | 珠海格力电器股份有限公司 | Single phase power supply unit and its control method |
| CN110154676A (en) * | 2019-05-05 | 2019-08-23 | 广东美的制冷设备有限公司 | Air-conditioning indoor and outdoor machine Wiring detection method, air condition with camion and its power supply unit |
| CN110154676B (en) * | 2019-05-05 | 2020-12-11 | 广东美的制冷设备有限公司 | Air conditioner indoor and outdoor unit wiring detection method, vehicle-mounted air conditioner and power supply device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101359826B (en) | 2013-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104167980B (en) | Photovoltaic system with intelligent turn-off function | |
| CN204649834U (en) | A kind of integral and intelligent electric energy meter with leakage current monitoring and protecting function | |
| CN106981881A (en) | A kind of photovoltaic generating system and its rapidly switch off method | |
| CN105910291A (en) | Electric water heater control system capable of being powered off intelligently | |
| CN105870687B (en) | A kind of power outlet with plug detection function | |
| CN101359826B (en) | Communication protecting equipment | |
| CN209446685U (en) | A kind of system for eliminating electrical fast transient (eft) interference | |
| CN204389925U (en) | A kind of air conditioner and low standby power loss circuit thereof | |
| CN206559119U (en) | A kind of battery MPPT charging circuits of photovoltaic off-grid system | |
| CN106225250A (en) | A kind of control system of electric water heater of tape relay fault feedback function | |
| CN109444599A (en) | A kind of system and method for eliminating electrical fast transient (eft) interference | |
| CN203135847U (en) | Electric pressure cooker and detection circuit for electric pressure cooker | |
| CN105259516B (en) | A kind of off-line UPS input switch abnormal detector | |
| CN204361335U (en) | A kind of supply socket with plug detection function | |
| CN104299808B (en) | A kind of isolation switch control system | |
| CN204449596U (en) | Plasma cutting power supply output coupling device safety protective circuit | |
| CN208110295U (en) | A kind of control circuit of signal system safety power supply | |
| CN205583849U (en) | Isolated form DC power supply panel monitoring module | |
| CN208337139U (en) | Residual voltage control circuit and household appliance with same | |
| CN206671934U (en) | A kind of second protection circuit of toaster | |
| CN202818119U (en) | Circuit for identifying and converting AC zero and live wire | |
| CN202631997U (en) | Wireless-based smart household safety cutting device | |
| CN202167826U (en) | Electric leakage and excess temperature protection control circuit for intelligent electronic closet controller | |
| CN204144902U (en) | Safety return circuit shorted to earth protective device | |
| CN202975637U (en) | On-off input signal collecting and on-off output signal forwarding device for wind power generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20180803 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |