CN107064605A - A kind of voltage detecting circuit and air-conditioning system with buffer action - Google Patents
A kind of voltage detecting circuit and air-conditioning system with buffer action Download PDFInfo
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- CN107064605A CN107064605A CN201710426685.XA CN201710426685A CN107064605A CN 107064605 A CN107064605 A CN 107064605A CN 201710426685 A CN201710426685 A CN 201710426685A CN 107064605 A CN107064605 A CN 107064605A
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- 230000009471 action Effects 0.000 title claims abstract description 28
- 238000004378 air conditioning Methods 0.000 title claims abstract description 22
- 230000008878 coupling Effects 0.000 claims abstract description 56
- 238000010168 coupling process Methods 0.000 claims abstract description 56
- 238000005859 coupling reaction Methods 0.000 claims abstract description 56
- 230000003287 optical effect Effects 0.000 claims abstract description 56
- 230000005611 electricity Effects 0.000 claims description 13
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- 238000002955 isolation Methods 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
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Abstract
The invention discloses a kind of voltage detecting circuit with buffer action, including bleeder circuit, the input connection of bleeder circuit and linear optical coupling；The first resistor being connected with linear optical coupling and the first operational amplifier, the inverting input connection of the first end of first resistor and the ungrounded output end of linear optical coupling and the first operational amplifier, second end of first resistor is connected with the output end of the first operational amplifier, and the in-phase input end of the first operational amplifier and the earth terminal of linear optical coupling are connected；The output end of first operational amplifier is as the power supply of the mainboard of air-conditioning equipment, and the earth terminal of bleeder circuit is connected with the first ground, and the earth terminal of the earth terminal of linear optical coupling and the first operational amplifier is connected with the second ground.This circuit is realized by linear optical coupling isolates, and can effectively protect not disturbed by outside input circuit for mainboard, anti-interference strong advantage wide with detectable voltage.In addition, invention additionally discloses a kind of air-conditioning system, effect is as described above.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of voltage detecting circuit and air-conditioning with buffer action
System.
Background technology
Due to the market demand, it is generally the case that client is by pressure regulator or adjusts electric current device that voltage signal is input into sky
The mainboard of equipment is adjusted, mainboard determines the speed of convertible frequency air-conditioner operation according to the size of client's input voltage, so as to realize automatic
Control.When client need not so big refrigerating capacity when, can decline the voltage of input, it is necessary to during big refrigerating capacity, make input
Voltage rise.Therefore, it is necessary to be detected to the input voltage of mainboard, to prevent mainboard in air-conditioning equipment running
Input voltage exceed normal range (NR).
At present, in the voltage detecting process to mainboard, typically directly accessed by the direct partial pressure of forceful electric power and then low pressure single
Piece machine, is then detected using single-chip microcomputer.But, in specific implementation, by do not know pressure regulator that client provided or
Adjust electric current device be forceful electric power or light current, if by pressure regulator or adjusting input of the output end of electric current device directly with mainboard to connect
If connecing, then easily cause mainboard and disturbed by external power source, or even damage.
Therefore, in the voltage detecting process to mainboard, how to protect mainboard not disturbed and damaged by external power source is this
Art personnel's urgent problem to be solved.
The content of the invention
It is an object of the invention to provide a kind of voltage detecting circuit with buffer action and air-conditioning system, for master
In the voltage detecting process of plate, mainboard is protected not disturbed and damaged by external power source.
In order to solve the above technical problems, the present invention provides a kind of voltage detecting circuit with buffer action, including with visitor
The bleeder circuit of the output end connection of family input power；
The output end of the bleeder circuit and the input of linear optical coupling are connected, for providing startup for the linear optical coupling
Signal and input current；
The first resistor being connected with the linear optical coupling and the first operational amplifier, the first end of the first resistor and institute
State the ungrounded output end of linear optical coupling and the inverting input connection of first operational amplifier, the of the first resistor
Two ends are connected with the output end of first operational amplifier, the in-phase input end of first operational amplifier with it is described linear
The earth terminal connection of optocoupler；
The output end of first operational amplifier is used as the power supply of the mainboard of air-conditioning equipment, the ground connection of the bleeder circuit
End is connected with the first ground, and the earth terminal of the earth terminal of the linear optical coupling and first operational amplifier is connected with the second ground.
Preferably, the bleeder circuit specifically includes second resistance, 3rd resistor, voltage follower, the 4th resistance, second
Operational amplifier and the 5th resistance；
The first end of the second resistance is connected with the positive pole of the output end of client's input power, the second resistance
The second end be connected with the first end of the 3rd resistor and the input of the voltage follower, the second of the 3rd resistor
End is connected as the earth terminal of the bleeder circuit with first ground, the output end of the voltage follower and the described 4th electricity
The first end connection of resistance, the second end of the 4th resistance is connected with the inverting input of second operational amplifier, described
The inverting input of second operational amplifier also with the output end of second operational amplifier and the 5th resistance first
End connection, the in-phase input end of second operational amplifier is connected with first ground, the second end of the 5th resistance with
Second end of the 4th resistance as the bleeder circuit output end.
Preferably, in addition to the first electric capacity, first electric capacity is connected in parallel on the anti-phase input of second operational amplifier
Between end and the output end of second operational amplifier.
Preferably, in addition to the second electric capacity, second electric capacity is in parallel with the 3rd resistor, respectively with the described second electricity
Resistance and first ground connection.
Preferably, in addition to the 3rd electric capacity, the 3rd electric capacity is in parallel with the first resistor.
Preferably, the voltage follower is specially the 3rd operational amplifier, the 3rd operational amplifier it is same mutually defeated
Enter end as the input of the voltage follower, the inverting input of the 3rd operational amplifier and the 3rd computing are put
The output end connection of big device, common port as the voltage follower output end.
Preferably, the positive pole of the power input of the linear optical coupling is electrically connected by isolating transformer with city.
Preferably, in addition to the dial-up that is arranged between the output end of client's input power and the bleeder circuit is opened
Pass, the 6th resistance and the 7th resistance, the input for determining the bleeder circuit according to the signal of client's input power
Signal；
The first end of the toggle switch and the first end of the 6th resistance connection, the second end of the toggle switch with
The first end connection of 7th resistance, the 3rd end of the toggle switch and the 4th end of the toggle switch with the visitor
The positive pole connection of the output end of family input power, the second end of the 6th resistance and the second end of the 7th resistance with it is described
The negative pole connection of the output end of client's input power.
Preferably, the linear optical coupling is HCNR201.
In order to solve the above technical problems, the present invention provides a kind of air-conditioning system, including air-conditioning equipment body, in addition to it is above-mentioned
The described voltage detecting circuit with buffer action.
Voltage detecting circuit provided by the present invention with buffer action, including connect with the output end of client's input power
The bleeder circuit connect, the output end of bleeder circuit and the input of linear optical coupling are connected；The first resistor being connected with linear optical coupling
With the first operational amplifier, the first end of first resistor and the ungrounded output end of linear optical coupling and the first operational amplifier it is anti-
Phase input is connected, and the second end of first resistor is connected with the output end of the first operational amplifier, the first operational amplifier it is same
The earth terminal connection of phase input and linear optical coupling；The output end of first operational amplifier as the mainboard of air-conditioning equipment electricity
Source, the earth terminal of bleeder circuit is connected with the first ground, the earth terminal of linear optical coupling and the earth terminal of the first operational amplifier and
Two ground are connected.First, by allocating the divider resistance in bleeder circuit, low-voltage can be realized to high voltage client's input power
The wider voltage detecting of scope, isolates while being realized by linear optical coupling, can effectively protect the main power circuit of mainboard not by outer
Portion's input circuit is disturbed, and this circuit has detectable voltage wide, anti-interference strong advantage.
Brief description of the drawings
In order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used in embodiment will be done simply below
Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people
For member, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of voltage detecting circuit figure with buffer action provided in an embodiment of the present invention；
Fig. 2 is another voltage detecting circuit figure with buffer action provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Embodiment in invention, those of ordinary skill in the art are not under the premise of creative work is made, and what is obtained is every other
Embodiment, belongs to the scope of the present invention.
The core of the present invention is to provide a kind of voltage detecting circuit with buffer action and air-conditioning system, for master
In the voltage detecting process of plate, mainboard is protected not disturbed and damaged by external power source.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 is a kind of voltage detecting circuit figure with buffer action provided in an embodiment of the present invention.As shown in figure 1, bag
Include the bleeder circuit 10 being connected with client's input power CN13 output end.
The output end of bleeder circuit 10 is connected with linear optical coupling PC2 input, for providing startup for linear optical coupling PC2
Signal and input current；The first resistor R1 being connected with linear optical coupling PC2 and the of the first operational amplifier U1, first resistor R1
One end and linear optical coupling PC2 ungrounded output end (being 6 pins in figure) and the first operational amplifier U1 inverting input connect
Connect, first resistor R1 the second end is connected with the first operational amplifier U1 output end, the first operational amplifier U1's is same mutually defeated
Enter end to be connected with linear optical coupling PC2 earth terminal (5 pin).
First operational amplifier U1 output end vo ut is used as the power supply of the mainboard of air-conditioning equipment, the ground connection of bleeder circuit 10
End is connected with the first ground GND, and linear optical coupling PC2 earth terminal and the first operational amplifier U1 earth terminal and the second ground GND1 connect
Connect.
In specific implementation, linear optical coupling can select HCNR201, as shown in Figure 1.It is understood that Fig. 1 is one
Specific application scenarios are planted, a kind of this model can only be chosen by not representing linear optical coupling.As shown in figure 1, client's input power
CN13 voltage is Vin, after bleeder circuit 10, just obtains the output voltage of another voltage, i.e. bleeder circuit.Partial pressure electricity
The output signal on road as linear optical coupling PC2 input signal so that for linear optical coupling PC2 provide enabling signal and input electricity
Stream.
Here enabling signal is exactly the signal of the light emitting diode between linear optical coupling PC2 1 pin and 2 pins, should
It is 12V that the positive pole of light emitting diode, which is connected in the positive pole of power supply, Fig. 1, then when the voltage that bleeder circuit 10 is provided is less than 12V,
Then the light emitting diode is lighted, and linear optical coupling PC2 starts to start.It should be noted that 12V here is a kind of specific implementation
Mode, it can only be 12V not represent.
In addition, bleeder circuit 10 also provides input current to linear optical coupling PC2, as shown in figure 1, the 3 of linear optical coupling PC2 draw
Pin and 4 pins are connected with bleeder circuit 10, due to linear optical coupling PC2 characteristic, when the timing of I12 current values one, flow through 3 pins and
The electric current I34 of light emitting diode between 4 pins is equal to the electric current between the light emitting diode flowed through between 5 pins and 6 pins
I56。
Due to client's input power CN13 voltage be Vin be, it is known that and bleeder circuit 10 parameter be also it is known, because
This, the output signal of bleeder circuit 10 can just be calculated, so that according to above-mentioned derivation, I56 is calculated, then according to
One resistance R1 and the first operational amplifier U1 annexation obtain the first operational amplifier U1 output end vo ut value, so that
Obtain the supply voltage value of the mainboard of air-conditioning equipment.In this circuit, the power supply of mainboard is defeated by linear optical coupling PC2 and client
Enter power supply CN13 isolation, therefore, in the supply voltage value detection process to mainboard is realized, mainboard can be avoided by external electrical
The interference in source.
The voltage detecting circuit with buffer action that the present embodiment is provided, including connect with the output end of client's input power
The bleeder circuit connect, the output end of bleeder circuit and the input of linear optical coupling are connected；The first resistor being connected with linear optical coupling
With the first operational amplifier, the first end of first resistor and the ungrounded output end of linear optical coupling and the first operational amplifier it is anti-
Phase input is connected, and the second end of first resistor is connected with the output end of the first operational amplifier, the first operational amplifier it is same
The earth terminal connection of phase input and linear optical coupling；The output end of first operational amplifier as the mainboard of air-conditioning equipment electricity
Source, the earth terminal of bleeder circuit is connected with the first ground, the earth terminal of linear optical coupling and the earth terminal of the first operational amplifier and
Two ground are connected.First, by allocating the divider resistance in bleeder circuit, low-voltage can be realized to high voltage client's input power
The wider voltage detecting of scope, isolates while being realized by linear optical coupling, can effectively protect the main power circuit of mainboard not by outer
Portion's input circuit is disturbed, and this circuit has detectable voltage wide, anti-interference strong advantage.
Fig. 2 is another voltage detecting circuit figure with buffer action provided in an embodiment of the present invention.As shown in Fig. 2
On the basis of above-described embodiment, preferably embodiment, bleeder circuit 10 specifically includes second resistance R2,3rd resistor
R3, voltage follower, the 4th resistance R4, the second operational amplifier U2 and the 5th resistance R5.
Second resistance R5 first end is connected with the positive pole of client's input power CN13 output end, and the of second resistance R2
Two ends are connected with 3rd resistor R3 first end and the input of voltage follower, and 3rd resistor R3 the second end is used as partial pressure electricity
The earth terminal on road 10 is connected with the first ground GND, and the output end of voltage follower is connected with the 4th resistance R4 first end, the 4th electricity
Resistance R4 the second end is connected with the second operational amplifier U2 inverting input, and the second operational amplifier U2 inverting input is also
It is connected with the second operational amplifier U2 output end and the 5th resistance R5 first end, the second operational amplifier U2 homophase input
End is connected with the first ground GND, the 5th resistance R5 the second end and the 4th resistance R4 the second end as bleeder circuit 10 output
End.
Preferably embodiment, voltage follower is specially the 3rd operational amplifier U3, the 3rd operational amplifier U3
In-phase input end be used as the input of voltage follower, the 3rd operational amplifier U3 inverting input and the 3rd operation amplifier
Device U3 output end connection, common port as voltage follower output end.
The maximum voltage upper limit is inputted with client's agreement, by adjusting second resistance R2,3rd resistor R3 resistance so that will
Input voltage vin partial pressure is a suitable magnitude of voltage.Because circuit subsequently has load, i.e., equal to have load resistance and the 3rd electricity
Resistance R3 is in parallel so as to influence partial pressure precision, therefore by operational amplifier high input impedance charcteristic, designs a voltage follower,
The voltage follower is specially that single device U3 is put in the 3rd computing.
Due to the characteristic of voltage follower, Vin1 voltages are made to be equal to the voltage at 3rd resistor R3 two ends.Vin1 passes through the 4th
The second operational amplifier U2 is inputted after resistance R4 current limlitings, according to the characteristic of operational amplifier, when the pin of the second operational amplifier U2 the 6th
Voltage is higher than the 5th pin voltage (5 pin ground connection), i.e., when the pin of the second operational amplifier U2 the 6th have control source, the second operational amplifier
The output end of the pin of U2 the 7th, i.e. the second operational amplifier U2, exports low level (during comparator V- ＞ V+, exporting low level) immediately,
Light emitting diode between 1 pin and 2 pins of linear optical coupling PC2 chips is shinny, linear optical coupling PC2 chip operations.Due to fortune
Amplifier characteristic I+=I- is calculated, therefore flows through the electric current I34 of the light emitting diode between linear optical coupling PC2 3 pins and 4 pins
=Vin1/R4, due to linear optical coupling PC2 characteristics, when the timing of I12 current values one, I34 electric currents are equal to linear optical coupling PC2 5 pins
And the electric current of 6 light emitting diode between pin, i.e. I34=I56.Again according to operational amplifier characteristic, I+=I-, therefore pass through
After first operational amplifier U1, the electric current for flowing through first resistor R1 is equal to I56 electric currents, then has IR1=I34.According to following derivation：
Vin1/R4=Vout/R1；
Vin1=R3*Vin/ (R2+R3)；
Therefore, final Vout=R3*Vin*R1/ [(R2+R3) * R4].
It should be noted that can be carried out to the first operational amplifier U1 output voltage Vout clamped, control Vout is most
A height of 5.5V.Especially by the diode between the output end and the power input of mainboard for being arranged on the first operational amplifier U1
Realized with electric capacity, such as Fig. 1 or as shown in Figure 2.In addition, the 5th resistance of regulation so that linear optical coupling PC2 input and output electric current is in 1
Than 1 characteristic.Further, it is also possible to adjust the 4th resistance R4 and first resistor R1 resistance so that input current controls zone of reasonableness,
Operational amplifier distortion is smaller.
As shown in Fig. 2 preferably embodiment, in addition to the first electric capacity C1, the first electric capacity C1 are connected in parallel on the second fortune
Calculate between amplifier U2 inverting input and the second operational amplifier U2 output end.
As shown in Fig. 2 preferably embodiment, in addition to the second electric capacity C2, the second electric capacity C2 and 3rd resistor R3
Parallel connection, is connected with second resistance R2 and the first ground GND respectively.Wherein, the second electric capacity C2 act as filtering, directly connect after filtering
Enter the 3rd operational amplifier U3.
As shown in Fig. 2 preferably embodiment, in addition to the 3rd electric capacity C3, the 3rd electric capacity C3 and first resistor R1
It is in parallel.
Preferably embodiment, the positive pole of the power input of linear optical coupling is electrically connected by isolating transformer with city
Connect.
Powered by isolating transformer for linear optical coupling, can further improve the isolation effect of voltage detecting circuit.Extremely
In the model and specific circuit connection structure of isolating transformer, the present embodiment is repeated no more.
Preferably embodiment, in addition to be arranged on client's input power CN13 output end and bleeder circuit 10 it
Between toggle switch K, the 6th resistance R6 and the 7th resistance R7, for determining bleeder circuit 10 according to the signal of client's input power
Input signal.
Toggle switch K first end and the connection of the 6th resistance R6 first end, toggle switch K the second end and the 7th resistance
R7 first end connection, the output of toggle switch K the 3rd end and toggle switch K the 4th end with client's input power CN13
The positive pole connection at end, the 6th resistance R6 the second end and the 7th resistance R7 the second end and client's input power CN13 output end
Negative pole connection.
Client's input power CN13 is probably voltage source it could also be possible that current source, if current source, then dial-up is opened
The two-way for closing K is both turned on, input current Iin* (R6+R7)/(R6*R7)=Vin, Vout=R3*Vin*R1/ [(R2+R3) *
R4]。
It is described in detail above for the corresponding embodiment of voltage detecting circuit with buffer action, the present invention
A kind of air-conditioning system, including air-conditioning equipment body, in addition to the electricity of the voltage detecting with buffer action described above are also provided
Road.
The attachment structure present invention of air-conditioning equipment body is repeated no more, and due to the voltage detecting circuit with buffer action
Detailed description hereinbefore has been carried out, therefore this implementation is repeated no more.
Detailed Jie has been carried out to the voltage detecting circuit provided by the present invention with buffer action and air-conditioning system above
Continue.The embodiment of each in specification is described by the way of progressive, and what each embodiment was stressed is and other embodiment
Difference, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment, by
Corresponded to the method disclosed in Example in it, so description is fairly simple, related part is referring to method part illustration.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also be right
The present invention carries out some improvement and modification, and these are improved and modification is also fallen into the protection domain of the claims in the present invention.
It should also be noted that, in this manual, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include that
A little key elements, but also other key elements including being not expressly set out, or also include be this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there is other identical element in the process including the key element, method, article or equipment.
Claims (10)
1. a kind of voltage detecting circuit with buffer action, it is characterised in that including connecting with the output end of client's input power
The bleeder circuit connect；
The output end of the bleeder circuit and the input of linear optical coupling are connected, for providing enabling signal for the linear optical coupling
And input current；
The first resistor being connected with the linear optical coupling and the first operational amplifier, the first end of the first resistor and the line
Property optocoupler ungrounded output end and first operational amplifier inverting input connection, the second end of the first resistor
It is connected with the output end of first operational amplifier, in-phase input end and the linear optical coupling of first operational amplifier
Earth terminal connection；
The output end of first operational amplifier as the mainboard of air-conditioning equipment power supply, the earth terminal of the bleeder circuit with
First ground is connected, and the earth terminal of the earth terminal of the linear optical coupling and first operational amplifier is connected with the second ground.
2. the voltage detecting circuit according to claim 1 with buffer action, it is characterised in that the bleeder circuit tool
Body includes second resistance, 3rd resistor, voltage follower, the 4th resistance, the second operational amplifier and the 5th resistance；
The first end of the second resistance is connected with the positive pole of the output end of client's input power, and the of the second resistance
Two ends are connected with the first end of the 3rd resistor and the input of the voltage follower, and the second end of the 3rd resistor is made
It is connected for the earth terminal of the bleeder circuit with first ground, the output end of the voltage follower and the 4th resistance
First end is connected, and the second end of the 4th resistance is connected with the inverting input of second operational amplifier, and described second
The inverting input of operational amplifier also connects with the output end of second operational amplifier and the first end of the 5th resistance
Connect, the in-phase input end of second operational amplifier is connected with first ground, the second end of the 5th resistance and described
Second end of the 4th resistance as the bleeder circuit output end.
3. the voltage detecting circuit according to claim 2 with buffer action, it is characterised in that also including the first electricity
Hold, first electric capacity is connected in parallel on the output of the inverting input and second operational amplifier of second operational amplifier
Between end.
4. the voltage detecting circuit according to claim 2 with buffer action, it is characterised in that also including the second electricity
Hold, second electric capacity is in parallel with the 3rd resistor, is connected respectively with the second resistance and first ground.
5. the voltage detecting circuit according to claim 2 with buffer action, it is characterised in that also including the 3rd electricity
Hold, the 3rd electric capacity is in parallel with the first resistor.
6. the voltage detecting circuit with buffer action according to claim 2-5 any one, it is characterised in that described
Voltage follower is specially the 3rd operational amplifier, and the in-phase input end of the 3rd operational amplifier is used as the voltage follow
The input of device, the output end connection of the inverting input and the 3rd operational amplifier of the 3rd operational amplifier is public
The output end as the voltage follower is held altogether.
7. the voltage detecting circuit according to claim 2 with buffer action, it is characterised in that the linear optical coupling
The positive pole of power input is electrically connected by isolating transformer with city.
8. the voltage detecting circuit according to claim 2 with buffer action, it is characterised in that also including being arranged on
Toggle switch, the 6th resistance and the 7th resistance between the output end of client's input power and the bleeder circuit are stated, for root
The signal of the input of the bleeder circuit is determined according to the signal of client's input power；
The first end of the toggle switch and the first end of the 6th resistance connection, the second end of the toggle switch with it is described
The first end connection of 7th resistance, the 3rd end of the toggle switch and the 4th end of the toggle switch are defeated with the client
Enter the positive pole connection of the output end of power supply, the second end of the 6th resistance and the second end of the 7th resistance and the client
The negative pole connection of the output end of input power.
9. the voltage detecting circuit according to claim 1 with buffer action, it is characterised in that the linear optical coupling is
HCNR201。
10. a kind of air-conditioning system, including air-conditioning equipment body, it is characterised in that also including described in claim 1-9 any one
The voltage detecting circuit with buffer action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710426685.XA CN107064605A (en) | 2017-06-08 | 2017-06-08 | A kind of voltage detecting circuit and air-conditioning system with buffer action |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710426685.XA CN107064605A (en) | 2017-06-08 | 2017-06-08 | A kind of voltage detecting circuit and air-conditioning system with buffer action |
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| CN107064605A true CN107064605A (en) | 2017-08-18 |
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| CN201710426685.XA Pending CN107064605A (en) | 2017-06-08 | 2017-06-08 | A kind of voltage detecting circuit and air-conditioning system with buffer action |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044882A (en) * | 2019-12-28 | 2020-04-21 | 广东盈科电子有限公司 | Fool-proof automatic testing device for 220V load and voltage |
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| CN111044882A (en) * | 2019-12-28 | 2020-04-21 | 广东盈科电子有限公司 | Fool-proof automatic testing device for 220V load and voltage |
| CN111044882B (en) * | 2019-12-28 | 2022-05-20 | 广东盈科电子有限公司 | Fool-proof automatic testing device for 220V load and voltage |
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