CN204478392U - Current loop communication circuit and air-conditioner - Google Patents
Current loop communication circuit and air-conditioner Download PDFInfo
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- CN204478392U CN204478392U CN201420849884.3U CN201420849884U CN204478392U CN 204478392 U CN204478392 U CN 204478392U CN 201420849884 U CN201420849884 U CN 201420849884U CN 204478392 U CN204478392 U CN 204478392U
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- optocoupler
- machine
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- current loop
- switch element
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Abstract
The utility model belongs to air-conditioning equipment field, particularly relates to a kind of current loop communication circuit and air-conditioner.The reception optocoupler of the utility model embodiment on existing current loop communication circuit and launch between optocoupler, a switch element and current-limiting resistance are set up, conducting and the cut-off of this transmitting optocoupler and current-limiting resistance gauge tap unit can be utilized respectively, thus be reached through the object of electric current loop signal transmission.Particularly, when current loop communication circuit is standby, launch optocoupler cut-off, current-limiting resistance is in order to control the conducting of described switch element to maintain described circuit in the state receiving wake-up signal.Because launch optocoupler remain off time standby, no longer need the maintenance of On current, therefore can reach the object reducing stand-by power consumption.Further, the current loop communication circuit that the utility model provides, have be widely used, circuit structure is simple, realize the advantages such as the low and antijamming capability of cost is strong.
Description
Technical field
The utility model belongs to air-conditioning equipment field, particularly relates to a kind of current loop communication circuit and air-conditioner.
Background technology
At present, mostly convertible frequency air-conditioner on market is applied current ring to communicate, its communication loop usually as shown in Figure 1, by main frame (indoor set) telecommunication circuit, form a unidirectional current loop I from machine (off-premises station) telecommunication circuit, current source, this be also cost lower, be simple and easy to realize, anti-interference stronger telecommunication circuit.
But, this telecommunication circuit to Received signal strength in standby, it must maintain conducting from the optocoupler transmitted machine, namely shown in Fig. 1 must conducting always from the transmitting optocoupler U2 of machine (off-premises station).Like this when being in holding state from machine, in order to the wake-up signal of main frame can be received at any time, the On current (being generally be more than or equal to 3mA) launching optocoupler U2 must be maintained.Therefore, current ring communication loop of the prior art also needs current sinking, produces more power consumption when standby, require more and more instantly high in energy-conserving and environment-protective, the stand-by power consumption of automatically controlled scheme requires also to become more and more higher, is badly in need of a kind of current loop communication circuit of low standby power loss.
Utility model content
Namely the purpose of this utility model is to provide a kind of current loop communication circuit and a kind of air-conditioner, to solve the technical problem that existing current loop communication circuit can produce stand-by power consumption, not meet energy-conserving and environment-protective requirement.
On the one hand, the current loop communication circuit that the utility model provides, comprises and receives optocoupler, transmitting optocoupler, switch element and current-limiting resistance; Described current-limiting resistance is connected between the control end of electric current loop input and described switch element, the transmitting terminal of described reception optocoupler is connected between the input of electric current loop input and described switch element, the receiving terminal of described transmitting optocoupler is connected between the control end of described switch element and electric current loop output, and the output of described switch element is connected on electric current loop output;
Time standby, described transmitting optocoupler cut-off, described current-limiting resistance is in order to control the conducting of described switch element to maintain described circuit in the state receiving wake-up signal.
On the other hand, the current loop communication circuit that the utility model provides, comprises interconnective current source, host module and from machine module, and described comprising from machine module receives optocoupler from machine, launch optocoupler, from machine switch element with from machine current-limiting resistance from machine; Describedly be connected between current source output and the described control end from machine switch element from machine current-limiting resistance, describedly receive the transmitting terminal of optocoupler from machine and be connected between current source output and the described input from machine switch element, describedly launch the receiving terminal of optocoupler from machine and be connected between the described control end from machine switch element and the described output from machine module, the described output from machine switch element is connected on described from the output of machine module, describedly receives the receiving terminal of optocoupler from machine and the described transmitting terminal launching optocoupler from machine connects supply voltage respectively simultaneously and from machine MCU;
Time standby, describedly launch optocoupler cut-off from machine, described from machine current-limiting resistance in order to control the described conducting from machine switch element to maintain described circuit in the state receiving wake-up signal.
The third aspect, the air-conditioner that the utility model provides, comprises indoor set and off-premises station, and its indoor set and off-premises station are the current loop communication circuits provided by above-mentioned second aspect carries out Signal transmissions.
The reception optocoupler of the utility model on existing current loop communication circuit and launch between optocoupler, a switch element and current-limiting resistance are set up, conducting and the cut-off of this transmitting optocoupler and current-limiting resistance gauge tap unit can be utilized respectively, thus be reached through the object of electric current loop signal transmission.Particularly, when current loop communication circuit is standby, launch optocoupler cut-off, current-limiting resistance is in order to control the conducting of described switch element to maintain described circuit in the state receiving wake-up signal.Because launch optocoupler remain off time standby, no longer need the maintenance of On current, therefore can reach the object reducing stand-by power consumption.Further, the current loop communication circuit that the utility model provides, have be widely used, circuit structure is simple, realize the advantages such as the low and antijamming capability of cost is strong.
Accompanying drawing explanation
Fig. 1 is the structural representation of current loop communication circuit in prior art;
Fig. 2 is the structural representation of the current loop communication circuit that the utility model one embodiment provides;
Fig. 3 is the structural representation of the current loop communication circuit that another preferred embodiment of the utility model provides.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 2 is the structural representation of the current loop communication circuit that the utility model one embodiment provides; For convenience of explanation, illustrate only part related to the present embodiment, as shown in the figure:
A kind of current loop communication circuit, comprises and receives optocoupler IC1, transmitting optocoupler IC2, switch element and current-limiting resistance R.Particularly, current-limiting resistance R is connected between electric current loop input and the control end of switch element, the transmitting terminal receiving optocoupler IC1 is connected between electric current loop input and the input of switch element, the receiving terminal launching optocoupler IC2 is connected between the control end of switch element and electric current loop output, and the output of switch element is connected on electric current loop output.
In specific implementation process, switch element can be made up of the switching tubes such as triode, IGBT, metal-oxide-semiconductor and circuit thereof.
According to the current loop communication circuit that the present embodiment provides, in practical work process, particularly when standby, launch optocoupler IC2 cut-off, current-limiting resistance R in order to the conducting of gauge tap unit to maintain described circuit in the state receiving wake-up signal.That is: time standby, launch optocoupler IC2 remain off, but whole current loop communication circuit is still in accepting state to receive wake-up signal at any time; Because now transmitting optocoupler IC2 cut-off and current loop communication circuit do not have electric current to input, reception optocoupler IC1 and switch element are all again not power consumptions, and the stand-by power consumption of whole like this circuit is just very little; But once current loop communication circuit has the electric current of wake-up signal to input, because now launching optocoupler IC2 is cut-off, then wake-up signal electric current can make switching means conductive by current-limiting resistance R, thus makes current lead-through receive optocoupler IC1, and then receives wake-up signal.Because launch optocoupler remain off time standby, no longer need the maintenance of On current, therefore can reach the object reducing stand-by power consumption.Further, the current loop communication circuit that the present embodiment provides, have be widely used, circuit structure is simple, realize the advantages such as the low and antijamming capability of cost is strong.
Namely Fig. 3 shows the structural representation of the current loop communication circuit that another preferred embodiment of the utility model provides, and the current loop communication circuit that above-mentioned Fig. 2 provides is applied in the circuit structure of a two-way communication by it.For convenience of explanation, it again illustrate only part related to the present embodiment, as shown in the figure:
A kind of current loop communication circuit, comprises interconnective current source 10, host module 20 and from machine module 30.As improvement, should comprise from machine module 30 and receive optocoupler U31 from machine, launch optocoupler U32, from machine switch element 301 with from machine current-limiting resistance 302 from machine.Particularly, from machine current-limiting resistance 302 be connected on current source 10 output and between the control end of machine switch element 301, the transmitting terminal receiving optocoupler U31 from machine be connected on current source 10 output and between the input of machine switch element 301, the receiving terminal launching optocoupler U32 from machine is connected between the control end from machine switch element 301 and the output from machine module 30, be connected on from the output of machine module 30 from the output of machine switch element 301, receive the receiving terminal of optocoupler U31 from machine and meet supply voltage VCC respectively and from machine MCU from the transmitting terminal that optocoupler U32 launched by machine simultaneously.
Same, when whole current loop communication circuit is standby, launch optocoupler U32 cut-off from machine, from machine current-limiting resistance 302 in order to control from the conducting of machine switch element 301, to maintain described circuit in the state receiving wake-up signal.That is: when standby, launch optocoupler U32 remain off, but be still in accepting state so that can the wake-up signal that sends of Receiving Host module 20 at any time from machine module 30.Because now launch optocoupler U32 cut-off and current loop communication circuit does not have electric current input, receive optocoupler U31 and be all again not power consumption from machine switch element 301, therefore the stand-by power consumption of whole circuit is just very little; But once host module 20 has the electric current of wake-up signal to input, because now launching optocoupler U32 is cut-off, then wake-up signal electric current can be made from machine switch element 301 conducting by current-limiting resistance 302, thus makes current lead-through receive optocoupler U31, and then receives wake-up signal.
Particularly, as a preferred embodiment, host module 20 comprises main frame and receives optocoupler U21 and main frame transmitting optocoupler U22; The transmitting terminal that main frame receives optocoupler U21 is connected on to be launched between the receiving terminal of optocoupler U22 from the output of machine module 30 and main frame, the receiving terminal of main frame transmitting optocoupler U22 connects the input of current source 10 simultaneously, and the transmitting terminal of receiving terminal and main frame transmitting optocoupler U22 that main frame receives optocoupler U21 meets supply voltage VCC and main frame MCU respectively simultaneously.
Further, as preferably, host module 20 can also comprise host switch unit 201 and main frame current-limiting resistance 202; This main frame current-limiting resistance 202 is connected on between the output and the control end of host switch unit 201 of machine module 30, the transmitting terminal that main frame receives optocoupler U21 is connected on between the output and the input of host switch unit 201 of machine module 30, the receiving terminal that optocoupler U22 launched by main frame is connected between the control end of host switch unit 201 and the input of current source 10, and the output of host switch unit 201 is also connected on the input of current source 10.
Further, in specific implementation process, the structure composition of current source 10 as shown in Figure 3, can comprise diode D1, resistance R1, resistance R2, Zener diode Z1 and electrochemical capacitor E1; The negative electrode of diode D1 connects live wire L, the first end of the anode contact resistance R1 of diode D1, second end of resistance R1 and the first end of resistance R2, the anode of Zener diode Z1 and the negative pole of electrochemical capacitor E1 connect the input that formed common contact is current source 10 altogether, the positive pole of second end of resistance R2, the negative electrode of Zener diode Z1 and electrochemical capacitor E1 connects the output that formed common contact is current source 10 altogether, and connects with zero line N.
Further, when specific implementation, switch element can be made up of the switching tubes such as triode, IGBT, metal-oxide-semiconductor and circuit thereof.Namely from the structure composition of machine switch element 301 and host switch unit 201 can be triode, IGBT and/or metal-oxide-semiconductor.In the preferred embodiment shown in the drawings, what all adopt from machine switch element 301 and host switch unit 201 is PNP type triode.Particularly, the base stage of PNP type triode, collector and emitter correspond respectively to the control end of switch element, input and output.
In fact, in the embodiment shown in the drawings, no matter be from machine switch element 301 or host switch unit 201, all on its control end and input, be connected in series a resistance respectively, be beneficial to the stable transfer ensureing wake-up signal electric current.Further, be serially connected with resistance and one way conducting device from the output of machine module 30, this one way conducting device includes but not limited to diode.Same, the resistance of serial connection and one way conducting device are also the stable transfer in order to ensure wake-up signal electric current.
Current loop communication circuit according to Fig. 3, in practical work process, time standby, launches optocoupler U32 cut-off from machine, current-limiting resistance 302 in order to the conducting of gauge tap unit 301 with holding circuit in the state receiving wake-up signal.When the main frame of host module 20 launches optocoupler U22 turn-on current source 10, to when inputting the electric current of wake-up signal from machine module 30, optocoupler U32 remain off is launched from machine, wake-up signal electric current makes from machine switch element 301 conducting by current-limiting resistance 302, thus make current lead-through receive optocoupler U31 from machine, and then receive wake-up signal and be transferred to main frame reception optocoupler U21.Because launch optocoupler U32 remain off from machine time standby, no longer need the maintenance of On current, therefore can reach the object reducing stand-by power consumption.Further, the current loop communication circuit that the present embodiment provides, have be widely used, circuit structure is simple, realize the advantages such as the low and antijamming capability of cost is strong.
When above-mentioned current loop communication circuit is applied to air-conditioner field, for normal domestic use air-conditioning, indoor set is host module, and off-premises station just belongs to from machine module.Therefore, the utility model embodiment finally also provides a kind of air-conditioner, and this air-conditioner comprises indoor set and off-premises station, and its indoor set and off-premises station are the current loop communication circuits provided by each embodiment above-mentioned carries out Signal transmissions.
To sum up, the reception optocoupler of the utility model embodiment on existing current loop communication circuit and launch between optocoupler, a switch element and current-limiting resistance are set up, utilize conducting and the cut-off of this transmitting optocoupler and current-limiting resistance gauge tap unit respectively, thus be reached through the object of electric current loop signal transmission.Particularly, when current loop communication circuit is standby, launch optocoupler cut-off, current-limiting resistance is in order to control the conducting of described switch element to maintain described circuit in the state receiving wake-up signal.Because launch optocoupler remain off time standby, no longer need the maintenance of On current, therefore can reach the object reducing stand-by power consumption.Further, the current loop communication circuit that the utility model provides, have be widely used, circuit structure is simple, realize the advantages such as the low and antijamming capability of cost is strong.
It should be noted that in above-described embodiment, included unit is carry out dividing according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit, also just for the ease of mutual differentiation, is not limited to protection domain of the present utility model.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, although carried out comparatively detailed description with reference to previous embodiment to the utility model, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments or carry out equivalent replacement to wherein portion of techniques feature.All do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a current loop communication circuit, is characterized in that, described circuit comprises reception optocoupler, launches optocoupler, switch element and current-limiting resistance;
Described current-limiting resistance is connected between the control end of electric current loop input and described switch element, the transmitting terminal of described reception optocoupler is connected between the input of electric current loop input and described switch element, the receiving terminal of described transmitting optocoupler is connected between the control end of described switch element and electric current loop output, and the output of described switch element is connected on electric current loop output;
Time standby, described transmitting optocoupler cut-off, described current-limiting resistance is in order to control the conducting of described switch element to maintain described circuit in the state receiving wake-up signal.
2. current loop communication circuit as claimed in claim 1, it is characterized in that, described switch element comprises triode, IGBT and/or metal-oxide-semiconductor.
3. a current loop communication circuit, comprises interconnective current source, host module and from machine module, it is characterized in that, described comprising from machine module receives optocoupler from machine, launch optocoupler, from machine switch element with from machine current-limiting resistance from machine;
Describedly be connected between current source output and the described control end from machine switch element from machine current-limiting resistance, describedly receive the transmitting terminal of optocoupler from machine and be connected between current source output and the described input from machine switch element, describedly launch the receiving terminal of optocoupler from machine and be connected between the described control end from machine switch element and the described output from machine module, the described output from machine switch element is connected on described from the output of machine module, describedly receives the receiving terminal of optocoupler from machine and the described transmitting terminal launching optocoupler from machine connects supply voltage respectively simultaneously and from machine MCU;
Time standby, describedly launch optocoupler cut-off from machine, described from machine current-limiting resistance in order to control the described conducting from machine switch element to maintain described circuit in the state receiving wake-up signal.
4. current loop communication circuit as claimed in claim 3, is characterized in that, described host module comprises main frame and receives optocoupler and main frame transmitting optocoupler;
The transmitting terminal of described main frame reception optocoupler is connected on the described output from machine module and described main frame is launched between the receiving terminal of optocoupler, the receiving terminal of described main frame transmitting optocoupler connects the input of described current source simultaneously, and the transmitting terminal of receiving terminal and described main frame transmitting optocoupler that described main frame receives optocoupler meets supply voltage and main frame MCU respectively simultaneously.
5. current loop communication circuit as claimed in claim 4, it is characterized in that, described host module also comprises host switch unit and main frame current-limiting resistance;
Described main frame current-limiting resistance is connected on described between the output and the control end of described host switch unit of machine module, the transmitting terminal that described main frame receives optocoupler is connected on described between the output and the input of described host switch unit of machine module, between the control end that the receiving terminal that optocoupler launched by described main frame is connected on described host switch unit and the input of described current source, the output of described host switch unit is also connected on the input of described current source.
6. current loop communication circuit as claimed in claim 5, it is characterized in that, described current source comprises diode D1, resistance R1, resistance R2, Zener diode Z1 and electrochemical capacitor E1;
The negative electrode of described diode D1 connects live wire L, the anode of described diode D1 connects the first end of described resistance R1, second end of described resistance R1 and the first end of described resistance R2, the anode of described Zener diode Z1 and the negative pole of described electrochemical capacitor E1 connect the input that formed common contact is described current source altogether, the positive pole of second end of described resistance R2, the negative electrode of described Zener diode Z1 and described electrochemical capacitor E1 connects the output that formed common contact is described current source altogether, and connects with zero line N.
7. current loop communication circuit as claimed in claim 5, is characterized in that, describedly comprises triode, IGBT and/or metal-oxide-semiconductor from machine switch element; Described host switch unit comprises triode, IGBT and/or metal-oxide-semiconductor.
8. current loop communication circuit as claimed in claim 7, it is characterized in that, the described control end from machine switch element and input are serially connected with a resistance respectively; The control end of described host switch unit and input are also serially connected with a resistance respectively.
9. current loop communication circuit as claimed in claim 7, it is characterized in that, the described output from machine module is serially connected with resistance and one way conducting device.
10. an air-conditioner, its indoor set and off-premises station carry out Signal transmissions by a current loop communication circuit, it is characterized in that, described current loop communication circuit is the current loop communication circuit described in any one of claim 3-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420849884.3U CN204478392U (en) | 2014-12-26 | 2014-12-26 | Current loop communication circuit and air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420849884.3U CN204478392U (en) | 2014-12-26 | 2014-12-26 | Current loop communication circuit and air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204478392U true CN204478392U (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420849884.3U Withdrawn - After Issue CN204478392U (en) | 2014-12-26 | 2014-12-26 | Current loop communication circuit and air-conditioner |
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| CN (1) | CN204478392U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596049A (en) * | 2014-12-26 | 2015-05-06 | 广东美的制冷设备有限公司 | Current loop communication circuit and air conditioner |
| CN105352129A (en) * | 2015-11-28 | 2016-02-24 | 安徽朗格暖通设备有限公司 | Current feedback circuit and air conditioner |
| CN107547109A (en) * | 2017-08-04 | 2018-01-05 | 广东美的制冷设备有限公司 | Air conditioner current loop communication circuit and air conditioner |
| CN114076401A (en) * | 2021-10-09 | 2022-02-22 | 佛山市顺德区美的电子科技有限公司 | Communication circuit, electronic equipment and communication method |
-
2014
- 2014-12-26 CN CN201420849884.3U patent/CN204478392U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596049A (en) * | 2014-12-26 | 2015-05-06 | 广东美的制冷设备有限公司 | Current loop communication circuit and air conditioner |
| CN104596049B (en) * | 2014-12-26 | 2017-05-31 | 广东美的制冷设备有限公司 | Current loop communication circuit and air-conditioner |
| CN105352129A (en) * | 2015-11-28 | 2016-02-24 | 安徽朗格暖通设备有限公司 | Current feedback circuit and air conditioner |
| CN107547109A (en) * | 2017-08-04 | 2018-01-05 | 广东美的制冷设备有限公司 | Air conditioner current loop communication circuit and air conditioner |
| CN107547109B (en) * | 2017-08-04 | 2021-05-25 | 广东美的制冷设备有限公司 | Air conditioner current loop communication circuit and air conditioner |
| US11378294B2 (en) | 2017-08-04 | 2022-07-05 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner current loop communication circuit and air conditioner |
| CN114076401A (en) * | 2021-10-09 | 2022-02-22 | 佛山市顺德区美的电子科技有限公司 | Communication circuit, electronic equipment and communication method |
| CN114076401B (en) * | 2021-10-09 | 2023-10-13 | 佛山市顺德区美的电子科技有限公司 | Communication circuit, electronic equipment and communication method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150715 Effective date of abandoning: 20170531 |