CN206818782U - 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
- Publication number
- CN206818782U CN206818782U CN201720664047.7U CN201720664047U CN206818782U CN 206818782 U CN206818782 U CN 206818782U CN 201720664047 U CN201720664047 U CN 201720664047U CN 206818782 U CN206818782 U CN 206818782U
- Authority
- CN
- China
- Prior art keywords
- operational amplifier
- resistance
- input
- output end
- optical coupling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model 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 first end of first resistor and the inverting input of the ungrounded output end of linear optical coupling and the first operational amplifier connect, 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 connect；Power supply of the output end of first operational amplifier as the mainboard of air-conditioning equipment, the earth terminal of bleeder circuit are 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, has the advantages of detectable voltage is wide, anti-interference strong.In addition, a kind of air-conditioning system is also disclosed in the utility model, effect is as described above.
Description
Technical field
The utility model is related to electronic technology field, more particularly to a kind of voltage detecting circuit with buffer action and
Air-conditioning 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, automatic so as to realize
Control.When client need not be so big refrigerating capacity when, the voltage of input can be made to decline, 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.
Utility model content
The purpose of this utility model is to provide a kind of voltage detecting circuit and air-conditioning system with buffer action, for
To in the voltage detecting process of mainboard, protecting mainboard not disturbed and damaged by external power source.
In order to solve the above technical problems, the utility model provides a kind of voltage detecting circuit with buffer action, including
The bleeder circuit being connected with the output end of client's input power；
The output end of the bleeder circuit and the input of linear optical coupling connect, 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
The ungrounded output end for stating linear optical coupling connects with the inverting input of first operational amplifier, and 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；
Power supply of the output end of first operational amplifier as 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
Hold and be 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
Output end of second end of the 4th resistance as the bleeder circuit.
Preferably, in addition to the first electric capacity, first electric capacity are 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 connects with first ground.
Preferably, in addition to the 3rd electric capacity, the 3rd electric capacity are 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 input of the end as the voltage follower, the inverting input of the 3rd operational amplifier and the 3rd computing are put
The output end connection of big device, output end of the common port as the voltage follower.
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, for determining the input of the bleeder circuit according to the signal of client's input power
Signal；
The first end of the toggle switch connects with the first end of the 6th resistance, 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 utility model provides a kind of air-conditioning system, including air-conditioning equipment body, in addition to
Voltage detecting circuit with buffer action described above.
Voltage detecting circuit provided by the utility model with buffer action, including the output with client's input power
The bleeder circuit of connection is held, the output end of bleeder circuit and the input of linear optical coupling connect；First be connected with linear optical coupling
Resistance and the first operational amplifier, the first end of first resistor and the ungrounded output end of linear optical coupling and the first operational amplifier
Inverting input connection, the second end of first resistor is connected with the output end of the first operational amplifier, the first operational amplifier
In-phase input end and linear optical coupling earth terminal connect；The output end of first operational amplifier is as the mainboard of air-conditioning equipment
Power supply, the earth terminal of bleeder circuit are connected with the first ground, the earth terminal of the earth terminal of linear optical coupling and the first operational amplifier with
Second ground connects.First, by allocating the divider resistance in bleeder circuit, the paramount electricity of low-voltage can be realized to client's input power
Press the wider voltage detecting of scope, while realized and isolated by linear optical coupling, can effectively protect the main power circuit of mainboard not by
Outside input circuit is disturbed, and this circuit has the advantages of detectable voltage is wide, anti-interference strong.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment, letter will be done to the required accompanying drawing used in embodiment below
Single introduction, it should be apparent that, drawings in the following description are only some embodiments of the utility model, general for this area
For logical technical staff, 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 that the utility model embodiment provides；
Fig. 2 is the voltage detecting circuit figure that the another kind that the utility model embodiment provides has buffer action.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is only the utility model part of the embodiment, rather than all real
Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made, institute
The every other embodiment obtained, belongs to scope of protection of the utility model.
Core of the present utility model is to provide a kind of voltage detecting circuit and air-conditioning system with buffer action, for
To in the voltage detecting process of mainboard, protecting mainboard not disturbed and damaged by external power source.
In order that those skilled in the art more fully understand the utility model, below in conjunction with the accompanying drawings and it is embodied
The utility model is described in further detail for mode.
Fig. 1 is a kind of voltage detecting circuit figure with buffer action that the utility model embodiment provides.Such as Fig. 1 institutes
Show, including 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 connects with linear optical coupling PC2 ungrounded output end (being 6 pins in figure) and the first operational amplifier U1 inverting input
Connect, first resistor R1 the second end is connected with the first operational amplifier U1 output end, and the first operational amplifier U1's is same mutually defeated
Enter end to be connected with linear optical coupling PC2 earth terminal (5 pin).
Power supplys of the first operational amplifier U1 output end vo ut as 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
The specific application scenarios of kind, 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
Input signal of the output signal on road as linear optical coupling PC2, so as to provide enabling signal and input electricity for linear optical coupling PC2
Stream.
Here enabling signal is exactly the signal of the light emitting diode between linear optical coupling PC2 1 pin and 2 pins, should
The positive pole of light emitting diode connects the positive pole of power supply, is 12V in Fig. 1, then when the voltage that bleeder circuit 10 provides 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 can of bleeder circuit 10 is calculated, so as to according to above-mentioned derivation, calculate I56, then according to the
One resistance R1 and the first operational amplifier U1 annexation obtain the first operational amplifier U1 output end vo ut value, so as to
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, realizing to mainboard in the supply voltage value detection process of mainboard, can be avoided by external electrical
The interference in source.
The voltage detecting circuit with buffer action that the present embodiment provides, 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 connect；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 connects, 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 of phase input and linear optical coupling connects；Electricity of the output end of first operational amplifier as the mainboard of air-conditioning equipment
Source, the earth terminal of bleeder circuit are connected with the first ground, the earth terminal of linear optical coupling and the earth terminal of the first operational amplifier and
Two ground connect.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, while realized and isolated by linear optical coupling, the main power circuit of mainboard can be effectively protected not by outer
Portion's input circuit is disturbed, and this circuit has the advantages of detectable voltage is wide, anti-interference strong.
Fig. 2 is the voltage detecting circuit figure that the another kind that the utility model embodiment provides has buffer action.Such as Fig. 2 institutes
Show, on the basis of above-described embodiment, preferably embodiment, bleeder circuit 10 specifically include second resistance R2, the 3rd
Resistance 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 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 output of the 5th resistance R5 the second end and the 4th resistance R4 the second end as bleeder circuit 10
End.
Preferably embodiment, voltage follower are specially the 3rd operational amplifier U3, the 3rd operational amplifier U3
Input of the in-phase input end as voltage follower, the 3rd operational amplifier U3 inverting input and the 3rd operation amplifier
Device U3 output end connection, output end of the common port as voltage follower.
Arrange the input maximum voltage upper limit with client, 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, that is, being equal to has load resistance and the 3rd electricity
Resistance R3 parallel connections design a voltage follower so as to influence partial pressure precision, therefore by operational amplifier high input impedance charcteristic,
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 both 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, low level (during comparator V- ＞ V+, exporting low level) is exported 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.Derived according to following：
Vin1/R4=Vout/R1；
Vin1=R3*Vin/ (R2+R3)；
Therefore, final Vout=R3*Vin*R1/ [(R2+R3) * R4].
It should be noted that output voltage Vout progress that can be to the first operational amplifier U1 is 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 adjusting 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, it is connected respectively with second resistance R2 and the first ground GND.Wherein, the second electric capacity C2 act as filtering, and is 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 are electrically connected by isolating transformer and city
Connect.
Powered by isolating transformer for linear optical coupling, can further improve the isolation effect of voltage detecting circuit.Extremely
Repeated no more in the model and specific circuit connection structure, the present embodiment of isolating transformer.
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 connects with 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 embodiment corresponding to the voltage detecting circuit with buffer action, this practicality
It is new that a kind of air-conditioning system, including air-conditioning equipment body, in addition to the inspection of the voltage with buffer action described above are also provided
Slowdown monitoring circuit.
Attachment structure the utility model of air-conditioning equipment body repeats no more, and due to the voltage detecting with buffer action
Detailed description hereinbefore has been carried out in circuit, therefore this implementation repeats no more.
The voltage detecting circuit provided by the utility model with buffer action and air-conditioning system have been carried out in detail above
It is thin to introduce.Each embodiment is described by the way of progressive in specification, and what each embodiment stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, 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, the premise of the utility model principle is not being departed from
Under, some improvement and modification can also be carried out to the utility model, these are improved and modification also falls into the utility model right and wanted
In the protection domain asked.
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 any this actual relation or order be present.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 elements not only include that
A little key elements, but also the other element including being not expressly set out, or also include for 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 other identical element in the process including the key element, method, article or equipment being also present.
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 connect, 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
The ungrounded output end of property optocoupler connects with the inverting input of first operational amplifier, 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；
Power supply of the output end of first operational amplifier as the mainboard of air-conditioning equipment, 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
Output end of second end of the 4th resistance as the bleeder circuit.
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. according to the voltage detecting circuit with buffer action described in 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 as the voltage follow
The input of device, the inverting input of the 3rd operational amplifier connect with the output end of the 3rd operational amplifier, public
Output end of the end as the voltage follower 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 include being arranged on institute
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 connects with the first end of the 6th resistance, 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 |
|---|---|---|---|
| CN201720664047.7U CN206818782U (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 |
|---|---|---|---|
| CN201720664047.7U CN206818782U (en) | 2017-06-08 | 2017-06-08 | A kind of voltage detecting circuit and air-conditioning system with buffer action |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206818782U true CN206818782U (en) | 2017-12-29 |
Family
ID=60759037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720664047.7U Active CN206818782U (en) | 2017-06-08 | 2017-06-08 | A kind of voltage detecting circuit and air-conditioning system with buffer action |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206818782U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064605A (en) * | 2017-06-08 | 2017-08-18 | 广东志高暖通设备股份有限公司 | A kind of voltage detecting circuit and air-conditioning system with buffer action |
| CN108941873A (en) * | 2018-05-21 | 2018-12-07 | 上海圣缑电磁设备有限公司 | Resistance welding circuit and its dynamic measurement and control method |
| CN113009213A (en) * | 2021-02-02 | 2021-06-22 | 深圳车库电桩科技有限公司 | Voltage transmitter |
-
2017
- 2017-06-08 CN CN201720664047.7U patent/CN206818782U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064605A (en) * | 2017-06-08 | 2017-08-18 | 广东志高暖通设备股份有限公司 | A kind of voltage detecting circuit and air-conditioning system with buffer action |
| CN108941873A (en) * | 2018-05-21 | 2018-12-07 | 上海圣缑电磁设备有限公司 | Resistance welding circuit and its dynamic measurement and control method |
| CN108941873B (en) * | 2018-05-21 | 2024-04-19 | 上海圣缑电磁设备有限公司 | Resistance welding circuit and dynamic measurement and control method thereof |
| CN113009213A (en) * | 2021-02-02 | 2021-06-22 | 深圳车库电桩科技有限公司 | Voltage transmitter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206818782U (en) | A kind of voltage detecting circuit and air-conditioning system with buffer action | |
| CN206542179U (en) | A kind of load overcurrent overvoltage crowbar | |
| CN103487767A (en) | Load driving circuit and electronic load | |
| CN205490115U (en) | Switch power supply circuit | |
| CN208862584U (en) | A kind of integrated charge battery protection functional circuit, single-chip microcontroller and charge-discharge circuit | |
| CN208479470U (en) | Adjustable voltage output circuit | |
| CN202330520U (en) | High-voltage isolation sampling circuit | |
| CN203800802U (en) | Large current detection circuit and power source circuit | |
| CN104635042A (en) | Electric energy acquisition module used for intelligent home | |
| CN206209447U (en) | Remote signals Acquisition Circuit and the distribution terminal being made of the circuit | |
| CN107040137A (en) | It is a kind of to strengthen control device, Vehicular charger and the automobile of main circuit | |
| CN206922415U (en) | A kind of under-voltage protecting circuit of onboard system, auto meter and vehicle | |
| CN110086464A (en) | Digital feedback analog signal isolating transmission circuit | |
| CN207589216U (en) | Adaptive fast response circuit and LED drive circuit | |
| CN207650680U (en) | A kind of constant voltage outputting circuit that can be used in parallel and constant pressure output system | |
| CN107064605A (en) | A kind of voltage detecting circuit and air-conditioning system with buffer action | |
| CN103647447B (en) | The supply unit of a kind of electric energy table communication module | |
| CN219496521U (en) | Direct current electric energy meter circuit suitable for DC1500V voltage input | |
| CN203896028U (en) | Multi-port usb charger | |
| CN207150845U (en) | A kind of band saturation voltage detection PTC control circuits | |
| CN204287447U (en) | A kind of alternating current-direct current input detecting circuit | |
| CN206411182U (en) | A kind of charging pile current divider current collection circuit | |
| CN108809293A (en) | A kind of voltage adaptive digital input circuit | |
| CN206314032U (en) | Inductive control circuit and LED power drive control circuit | |
| CN206819200U (en) | A kind of fictitious load control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510000 No.1 by helongsha villager group, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee after: Guangdong Kaili HVAC Co.,Ltd. Address before: 510000 No.1 by helongsha villager group, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG CHIGO HEATING AND VENTILATION EQUIPMENT Co.,Ltd. |