CN201429900Y - Frequency-changing air conditioner communication circuit - Google Patents
Frequency-changing air conditioner communication circuit Download PDFInfo
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- CN201429900Y CN201429900Y CN2009203057519U CN200920305751U CN201429900Y CN 201429900 Y CN201429900 Y CN 201429900Y CN 2009203057519 U CN2009203057519 U CN 2009203057519U CN 200920305751 U CN200920305751 U CN 200920305751U CN 201429900 Y CN201429900 Y CN 201429900Y
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- photoelectrical coupler
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Abstract
The utility model relates to a frequency-changing air conditioner communication unit, which comprises a pertinence circuit structure to improve, regulates connection of a communication circuit and device parameters for improving communication reliability, and can adapt for communication wave segments with higher baud rate. Safety protection of a photoelectric coupler in an indoor portion is increased, thereby preventing the photoelectric coupler from being punctured because a communication wire and an earth wire are oppositely connected, and achieving the safe use of the whole communication circuit. The communication circuit mainly comprises an indoor portion and an outdoor portion which form strong-power current ring communication connection. A direct current voltage stabilizing circuit and a strong-weak current isolation circuit consisting of photoelectric couplers PC 1 and PC 2 are arranged in the indoor portion. A strong-weak current isolation circuit consisting of photoelectric couplers PC 3 and PC 4 is arranged in the outdoor portion. A diode D6 is positively connected between the photoelectric couplers PC 1 and PC 2, namely the input side of the photoelectric coupler PC 1.
Description
Technical field
The utility model provides a kind of communicating circuit that is applied to carry out between convertible frequency air-conditioner air conditioner indoor machine and the off-premises station data interaction, belongs to household appliance technical field.
Background technology
Existing transducer air conditioning is effective and have energy-conservation characteristics because of its refrigerating/heating, and has obtained being extensive use of in family and business scope.Common between the indoor set and off-premises station of transducer air conditioning, the mode that adopts strong power current-loop to carry out data interaction.
Promptly in indoor set, the 220V alternating current is converted to the 24V direct current, strong, weak electricity is isolated mutually by 4 photoelectrical couplers between indoor and outdoors two parts by direct current regulation circuit.When carrying out data interaction between indoor set and the off-premises station, it is " conducting ", still " shutoff " that the state of the photoelectrical coupler by switching transmitting terminal comes the Control current ring, thereby the data-signal that has influence on the photoelectrical coupler reception of receiving end is " 1 ", or " 0 ".
Attached illustrated in figures 1 and 2 as the back, and the patent No. is ZL01280157.7, name is called the publication formerly of the electric current loop communicating circuit of transducer air conditioning, and there are the following problems usually at existing electric current loop communicating circuit.Receive bad as communication signal, be reflected among the experimental waveform figure, in the waveform delay asynchronism(-nization) step that is sent with receive, have hysteresis quality to a certain degree, when improving communication baud rate, can produce corresponding error and easily cause transmitting data and make a mistake, cause the job failure of air conditioner.
In addition, lack effective safeguard structure in the existing electric current loop communicating circuit, can directly puncture photoelectrical coupler in case alternating current connects inverse time, thus cause entire circuit scrap, improved the circuit maintenance cost.
The utility model content
Transducer air conditioning communicating circuit described in the utility model, circuit structure improves to be to take targetedly according to above-mentioned existing issue, adjusts communicating circuit connection and device parameters to improve the communication reliability, can be adapted to the communication band of higher baud rate.
Purpose of design of the present utility model is, increases the safety precaution of photoelectrical coupler in the indoor section, to avoid inverse time puncturing photoelectrical coupler because of connection and ground wire connect, realizes the safe handling of whole communicating circuit.
Another purpose of design is, optimizes the lag characteristic of electric current loop and the working point of adjustment photoelectrical coupler, to improve the synchronism that sends and receive waveform delay, avoids because of improving the transmission error in data that communication baud rate causes.
For realizing above-mentioned purpose of design, described transducer air conditioning communicating circuit mainly includes:
Form indoor section and outdoor section that the strong power current-loop communication connects.Wherein,
In indoor section, be provided with the strong and weak electricity buffer circuit that DC-stabilized circuit and photoelectrical coupler PC1 and PC2 form.
In outdoor section, be provided with the strong and weak electricity buffer circuit that photoelectrical coupler PC3 and PC4 form.
Be with the difference of prior art, in indoor section, between photoelectrical coupler PC1 and PC2, be that the input side forward of photoelectrical coupler PC1 connects a diode D6.
As above-mentioned basic design scheme, when the live wire and the ground wire of alternating current connects inverse time, the connection and the ground wire that are the DC-stabilized circuit two ends connect inverse time, the diode D6 that increases can form between photoelectrical coupler PC1 and PC2 and end, thereby with photoelectrical coupler PC1 and PC2 shutoff and can be not breakdown.
For optimizing the lag characteristic of whole electric current loop, can take following improvement project:
Promptly in outdoor section, in voltage stabilizing diode ZD4 rear side capacitor C 63 in parallel.Here said rear side is with respect to sending for the data to outdoor section from indoor section.
Promptly by the MCU control photoelectrical coupler PC1 of indoor set one side and the state of PC2, when photoelectrical coupler PC1 and PC2 conducting, electric current loop is in conducting state, then has corresponding direct current to flow to outdoor section from indoor section, at this moment, the signal of the signal receiving end of outdoor section reception is " 1 ";
When photoelectrical coupler PC1 and the shutoff of PC2 Be Controlled, electric current loop is in off state, does not then have direct current to pass through between indoor section and the outdoor section, and the signal of the signal receiving end of outdoor section reception at this moment is " 0 ".
For further improving the electric current loop operational reliability, the voltage stabilizing value of described voltage stabilizing diode ZD4 is 24V.
For optimizing the working point of photoelectrical coupler in the electric current loop, in indoor section, the resistance of the resistance R 5 of photoelectrical coupler PC1 in parallel is 1000 Ω.
As mentioned above, the utility model transducer air conditioning communicating circuit has the following advantages and beneficial effect:
At existing electric current loop communicating circuit,, improve communication data Design in Reliability purpose thereby reach by adjusting circuit connection and device parameters to improve the synchronism of indoor section and outdoor section waveform.
Electric current loop after the improvement can be applicable to the communication band of higher baud rate, the air conditioner job failure of avoiding factor to cause according to distortion.
Solved the problem that lacks in the existing communicating circuit at the photoelectrical coupler safety precaution, can avoid having improved the security performance of whole communicating circuit because of the AC power termination punctures photoelectrical coupler on the contrary.
Further optimize the working point of photoelectrical coupler in the communicating circuit, reduced the generation of the bad problem of communication.
Description of drawings
Now in conjunction with the accompanying drawings the utility model is described further
Fig. 1 is the outdoor section synoptic diagram of existing communicating circuit;
Fig. 2 is the indoor section synoptic diagram of existing communicating circuit;
Fig. 3 is the outdoor section synoptic diagram of transducer air conditioning communicating circuit described in the utility model;
Fig. 4 is the indoor section synoptic diagram of described transducer air conditioning communicating circuit;
Embodiment
In indoor section, be provided with the strong and weak electricity buffer circuit that DC-stabilized circuit and photoelectrical coupler PC1 and PC2 form.
DC-stabilized circuit mainly includes the live wire that is connected in parallel on the 220V alternating current and divider resistance R10, R11 and the R14 between the ground wire, and half-wave rectification diode D7, voltage stabilizing diode ZD1, capacitor filter C11.
In outdoor section, be provided with the strong and weak electricity buffer circuit that photoelectrical coupler PC3 and PC4 form.
Be compared to prior art as depicted in figs. 1 and 2, the main improvements that present embodiment is made are:
In indoor section, between photoelectrical coupler PC1 and PC2, photoelectrical coupler PC1 input side forward connects a diode D6.In addition, the resistance of the resistance R 5 of photoelectrical coupler PC1 in parallel is 1000 Ω.
In outdoor section, in voltage stabilizing diode ZD4 rear side capacitor C 63 in parallel, the voltage stabilizing value of voltage stabilizing diode ZD4 is 24V.
By the electric current loop that the strong power part of indoor section and outdoor section constitutes, implement the data communication between air conditioner room unit and the off-premises station.
The power supply of described strong power current-loop is the 24V DC-stabilized circuit, and the earth terminal of 24V DC-stabilized circuit connects the zero line of 220V alternating current, therefore uses above-mentioned four photoelectrical coupler PC1, PC2, PC3 and PC4 and carries out the strong and weak electricity isolation.
By four photoelectrical coupler PC1, PC2, PC3 and PC4, voltage signal is converted to current signal, finish data communication between air conditioner room unit and the off-premises station with the 24V dc signal.
Claims (4)
1. a transducer air conditioning communicating circuit includes and forms indoor section and the outdoor section that the strong power current-loop communication connects,
In indoor section, be provided with the strong and weak electricity buffer circuit that DC-stabilized circuit and photoelectrical coupler PC1 and PC2 form;
In outdoor section, be provided with the strong and weak electricity buffer circuit that photoelectrical coupler PC3 and PC4 form, it is characterized in that: between photoelectrical coupler PC1 and PC2, photoelectrical coupler PC1 input side forward connects a diode D6.
2. transducer air conditioning communicating circuit according to claim 1 is characterized in that: in outdoor section, in voltage stabilizing diode ZD4 rear side capacitor C 63 in parallel.
3. transducer air conditioning communicating circuit according to claim 1 is characterized in that: the voltage stabilizing value of voltage stabilizing diode ZD4 is 24V.
4. according to claim 1,2 or 3 described transducer air conditioning communicating circuits, it is characterized in that: in indoor section, the resistance of the resistance R 5 of photoelectrical coupler PC1 in parallel is 1000 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203057519U CN201429900Y (en) | 2009-07-07 | 2009-07-07 | Frequency-changing air conditioner communication circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203057519U CN201429900Y (en) | 2009-07-07 | 2009-07-07 | Frequency-changing air conditioner communication circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201429900Y true CN201429900Y (en) | 2010-03-24 |
Family
ID=42033640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203057519U Expired - Lifetime CN201429900Y (en) | 2009-07-07 | 2009-07-07 | Frequency-changing air conditioner communication circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201429900Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538137A (en) * | 2011-12-23 | 2012-07-04 | 四川长虹电器股份有限公司 | Anti-jamming circuit and anti-jamming method for air-conditioning strong-electricity communication |
| CN110470037A (en) * | 2019-08-01 | 2019-11-19 | 广东美的制冷设备有限公司 | Reverse-connection preventing circuit, method, apparatus and the air conditioner of convertible frequency air-conditioner power supply line |
-
2009
- 2009-07-07 CN CN2009203057519U patent/CN201429900Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538137A (en) * | 2011-12-23 | 2012-07-04 | 四川长虹电器股份有限公司 | Anti-jamming circuit and anti-jamming method for air-conditioning strong-electricity communication |
| CN110470037A (en) * | 2019-08-01 | 2019-11-19 | 广东美的制冷设备有限公司 | Reverse-connection preventing circuit, method, apparatus and the air conditioner of convertible frequency air-conditioner power supply line |
| CN110470037B (en) * | 2019-08-01 | 2021-06-22 | 广东美的制冷设备有限公司 | Anti-reverse connection circuit, method and device for power line of variable frequency air conditioner and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100324 |