CN209215928U - A kind of earth source heat pump unit management system with remote automatic control function - Google Patents
A kind of earth source heat pump unit management system with remote automatic control function Download PDFInfo
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- CN209215928U CN209215928U CN201920272821.9U CN201920272821U CN209215928U CN 209215928 U CN209215928 U CN 209215928U CN 201920272821 U CN201920272821 U CN 201920272821U CN 209215928 U CN209215928 U CN 209215928U
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Abstract
A kind of earth source heat pump unit management system with remote automatic control function of the utility model, is also connected with sequentially connected codan, isolating amplifier circuit, voltage-current converter circuit between sensor and PLC programmable controller；The effective solution received sensor detection signal of PLC programmable controller inaccurate problem.The utility model sensor exports the inhibited electromagnetic interference of small-signal, discharge electromagnetic interference, LC filter circuit filters out alternating current-direct current interference, improve sensor detection signal precision, after through ratio enlargement, Phototube Coupling is converted to photoelectrical coupler U1 pin 3, the branch pressure voltage of 4 junction resistance of pin and resistance R6 to power supply+5V, clipping is transmitted in 0-5V backward to prevent from interfering, the zero-decrement PLC programmable controller that is transferred to of current signal for being finally converted to linear 0-20mA solves transmission attenuation interference, improve the precision problem of PLC programmable controller receiving sensor detection signal.
Description
Technical field
The utility model relates to signal processing technology field, especially a kind of ground source with remote automatic control function
Heat pump unit management system.
Background technique
Earth source heat pump unit automation control at present detects live earth source heat pump unit operating parameter by sensor,
Be transferred to PLC programmable controller, PLC programmable controller analytical calculation, control earth source heat pump unit four-way valve aperture and
The reasonable running frequency of earth source heat pump unit pump carries out automatically controlling, and PLC programmable controller and monitoring system pass through communication network
Network (can be Ethernet) both-way communication realizes remote automatic control.
However, sensor detects live earth source heat pump unit operating parameter, it is transferred to PLC programmable controller
In the process, when being run vulnerable to ground source heat pump machine in electromagnetic interference influence and transmission signal decaying influence, it is programmable to will cause PLC
The signal that controller receives is inaccurate.
Therefore the utility model provides a kind of new scheme to solve the problems, such as this.
Utility model content
In view of the deficienciess of the prior art, the utility model aim, which is to provide one kind, has the function of remote automatic control
Earth source heat pump unit management system, effective solution PLC programmable controller received sensor detection signal is not smart enough
True problem.
Its technical solution solved is that Signal Pretreatment electricity is also connected between sensor and PLC programmable controller
Road, the signal pre-processing circuit include sequentially connected codan, isolating amplifier circuit, Voltage to current transducer electricity
Road；
The isolating amplifier circuit includes resistance R1, and the other end of one end connection inductance L2 of resistance R1, resistance R1's is another
One end connects the non-inverting input terminal of operational amplifier AR1, and the inverting input terminal of operational amplifier AR1 is separately connected the one of resistance R2
It holds, one end of resistance R3, the other end of resistance R3 is separately connected the pin 2 of one end of resistance R4, photoelectrical coupler U1, and operation is put
The pin 1 of the output end connection photoelectrical coupler U1 of big device AR1, the other end of capacitor C3, the other end of resistance R2, resistance R4
The other end is all connected with GND1, and the pin 4 of photoelectrical coupler U1 connects power supply+5V, and the pin 3 of photoelectrical coupler U1 is separately connected electricity
One end of R6, the non-inverting input terminal of operational amplifier AR2 are hindered, the inverting input terminal of operational amplifier AR2 is separately connected resistance R5
One end, resistance R7 one end, the other end of resistance R5 connects GND2 with one end of resistance R6, and the other end of resistance R7 connects respectively
Connect the cathode of the output end of operational amplifier AR2, the anode of diode D1, diode D2, the cathode connection power supply of diode D1+
The anode connection GND2 of 5V, diode D2.
The utility model has the beneficial effects that the inhibited electromagnetic interference of sensor output small-signal, release electromagnetic interference, LC
Filter circuit filters out alternating current-direct current interference, improves sensor detection signal precision, after through ratio enlargement, Phototube Coupling be converted to light
Electric coupler U1 pin 3,4 junction resistance of pin and resistance R6 to the branch pressure voltage of power supply+5V, clipping 0-5V transmit backward to prevent
It only interferes, the zero-decrement PLC programmable controller that is transferred to of current signal for being finally converted to linear 0-20mA solves transmission
Decaying interference improves the precision problem of PLC programmable controller receiving sensor detection signal.
Detailed description of the invention
Fig. 1 is the module map of the utility model.
Fig. 2 is the circuit connection schematic diagram of the utility model.
Specific embodiment
For aforementioned and other technology contents, feature and effect in relation to the utility model, following cooperation with reference to figures 1 through
Fig. 2 can be clearly presented in the detailed description of embodiment.The structure content being previously mentioned in following embodiment is to say
Bright book attached drawing is reference.
Each exemplary embodiment of the utility model is described below with reference to accompanying drawings.
Embodiment one, a kind of earth source heat pump unit management system with remote automatic control function, AF panel electricity
The live earth source heat pump unit operating parameter small-signal that sensor detects is inhibited electromagnetism to do by road through Transient Suppression Diode VD1
It disturbs, capacitor C1, capacitor C2 discharge electromagnetic interference to ground, then the LC filter circuit formed through inductance L2, capacitor C3 filters out alternating current-direct current
Interference enters isolating amplifier circuit to improve sensor signal precision later, is the amplification of core by operational amplifier AR1
Device carries out ratio enlargement, and photoelectrical coupler U1 Phototube Coupling is converted to photoelectrical coupler U1 pin 3,4 junction resistance of pin and resistance
R6 to the branch pressure voltage of power supply+5V, after through operational amplifier AR2 be core voltage follower, further increase anti-interference
Ability, diode D1, the further clipping of diode D2 are transferred to voltage-current converter circuit, are converted to linear 0- in 0-5V
The current signal of 20mA is transferred to PLC programmable controller, to improve signal transmission precision, solves PLC programmable controller
The inaccurate problem of the signal received；The isolating amplifier circuit passes through resistance R1, resistance R2, resistance R3, operation amplifier
The small-signal of the amplifier amplification sensor output of device AR1 composition, adjusts the multiple of resistance R3 resistance value adjustable proportion amplification,
It is added to the pin 1 of photoelectrical coupler U1 later, the input terminal pin 1 of photoelectrical coupler U1, pin 2 have voltage difference, voltage at this time
The size of difference causes photoelectrical coupler U1 input terminal curent change, so that the output pin 3 of photoelectrical coupler U1 be made to export electricity
Pressure (photoelectrical coupler U1 pin 3,4 junction resistance of pin and resistance R6 change the branch pressure voltage of power supply+5V) changes, and makes to pass
Sensor output signal is converted into after 0-5V to rear transmission, without transmitting immediately rearward, to prevent because doing caused by having the connection of electricity
Disturb, after through resistance R5, resistance R7, operational amplifier AR2 voltage follower improve anti-interference ability, diode D1, diode
The further clipping of D2 is transferred to voltage-current converter circuit, including resistance R1 after 0-5V, and one end of resistance R1 connects inductance L2
The other end, resistance R1 the other end connection operational amplifier AR1 non-inverting input terminal, the anti-phase input of operational amplifier AR1
End is separately connected one end of one end of resistance R2, resistance R3, and the other end of resistance R3 is separately connected the output of operational amplifier AR1
It holds, the pin 1 of photoelectrical coupler U1, the pin 2 of photoelectrical coupler U1 connects one end of resistance R4, the other end, the electricity of capacitor C3
The other end of the other end, resistance R4 that hinder R2 is all connected with GND1, and the pin 4 of photoelectrical coupler U1 connects power supply+5V, photoelectric coupling
The pin 3 of device U1 is separately connected the non-inverting input terminal of one end of resistance R6, operational amplifier AR2, the reverse phase of operational amplifier AR2
Input terminal is separately connected one end of one end of resistance R5, resistance R7, and the other end of resistance R5 connects GND2 with one end of resistance R6,
The other end of resistance R7 is separately connected the cathode of the output end of operational amplifier AR2, the anode of diode D1, diode D2, and two
The cathode of pole pipe D1 connects power supply+5V, the anode connection GND2 of diode D2.
Embodiment two, on the basis of example 1, the scene ground that the codan is used to detect sensor
Source heat pump unit operating parameter (including temperature sensor acquisition supply and return water temperature information, pressure sensor acquisition for return water
The flow information that pressure information, flow sensor acquire, the confession that can specifically acquire for the temperature sensor of model PT100 are returned
The flow sensor for pressure of return water, model DN20 of the pressure sensor acquisition of coolant-temperature gage, model MS5540CM acquires
Flow) small-signal through Transient Suppression Diode VD1 inhibit electromagnetic interference, capacitor C1, capacitor C2 discharge electromagnetic interference to
Afterwards, then after the LC filter circuit of inductance L2, capacitor C3 composition filters out alternating current-direct current interference it is transmitted after, wherein power supply VCC is through electricity
Sense L1 provides stable power supply, including sensors X 1 for sensor, and the pin 1 of sensors X 1 passes through inductance L1 connection power supply
VCC, the pin 2 of sensors X 1 be separately connected one end of inductance L2, the upper end of Transient Suppression Diode VD1, capacitor C1 one end,
The pin 3 of sensors X 1, the lower end of Transient Suppression Diode VD1, capacitor C2 one end be all connected with GND1, capacitor C1's is another
It holds, the other end of capacitor C2 is all connected with the earth, one end of the other end connection capacitor C3 of inductance L2, the other end connection of capacitor C3
GND2；
The voltage-current converter circuit is used to turn by the voltage and current that operational amplifier AR2 and triode Q2 is core
It changes after the 0-5V voltage signal that isolating amplifier circuit exports is converted to the current signal of linear 0-20mA by circuit and is transferred to PLC
Programmable controller solves the problems, such as that voltage signal transmission has decaying or drift, including one end connection of resistance R8, resistance R8
The output end of operational amplifier AR2, the other end of resistance R8 are separately connected the inverting input terminal of operational amplifier AR3, resistance R11
One end, the non-inverting input terminal of operational amplifier AR3 is separately connected one end of one end of resistance R12, resistance R10, operation amplifier
One end of the output end connection resistance R9 of device AR3, the base stage of the other end connecting triode Q1 of resistance R9, the current collection of triode Q1
Pole connects voltage+5V, and the emitter of triode Q1 is separately connected one end of the other end of resistance R10, resistance R13, resistance R13's
The other end is separately connected one end of the other end of resistance R11, resistance R14, and one end of resistance R14 is connected to PLC PLC technology
Device I/O interface, the anode of diode D2, the other end of resistance R12, resistance R14 the other end be all connected with GND2.
The utility model carry out using when, live earth source heat pump unit operating parameter is acquired by sensor,
The LC formed through inductance L1, capacitor C1 filters out alternating current-direct current interference, and operational amplifier AR1 is that the scaling circuit of core amplifies,
Operational amplifier AR2 and triode Q2 is that the voltage-current converter circuit of core is converted to the current signal biography of linear 0-20mA
It is defeated to arrive PLC programmable controller, it solves the problems, such as that voltage signal transmission has decaying or drift, improves the essence of signal detection
Degree, PLC programmable controller combination load by when calculating method calculate, control four-way valve aperture and earth source heat pump unit pump conjunction
The corresponding control of the equipment such as running frequency water pump, valve is managed, and by touch screen most close to the straight of field device actual conditions
The graphics mode of sight shows the operating condition of equipment, and operator can judge ground according to the temperature, pressure, data on flows of display
Source heat pump unit operation conditions, while live earth source heat pump unit operating parameter is transferred to monitoring system by communication network,
Monitoring system according to production plan demand carry out earth source heat pump United Dispatching and management, realize each unit centralized control and
Long-range regulatory requirement, monitoring system store data in database server and can by printing server by data-printing at report
Table.
Claims (2)
1. a kind of earth source heat pump unit management system with remote automatic control function, in sensor and PLC programmable control
Signal pre-processing circuit is also connected between device processed, which is characterized in that the signal pre-processing circuit includes sequentially connected dry
Disturb suppression circuit, isolating amplifier circuit, voltage-current converter circuit；
The isolating amplifier circuit includes resistance R1, the other end of one end connection inductance L2 of resistance R1, the other end of resistance R1
Connect operational amplifier AR1 non-inverting input terminal, the inverting input terminal of operational amplifier AR1 be separately connected resistance R2 one end,
One end of resistance R3, the other end of resistance R3 are separately connected the pin 1 of the output end of operational amplifier AR1, photoelectrical coupler U1,
The pin 2 of photoelectrical coupler U1 connects one end of resistance R4, the other end of capacitor C3, the other end of resistance R2, resistance R4 it is another
One end is all connected with GND1, and the pin 4 of photoelectrical coupler U1 connects power supply+5V, and the pin 3 of photoelectrical coupler U1 is separately connected resistance
One end of R6, operational amplifier AR2 non-inverting input terminal, the inverting input terminal of operational amplifier AR2 is separately connected resistance R5's
One end, resistance R7 one end, the other end of resistance R5 connects GND2 with one end of resistance R6, and the other end of resistance R7 is separately connected
The output end of operational amplifier AR2, the anode of diode D1, diode D2 cathode, diode D1 cathode connection power supply+
The anode connection GND2 of 5V, diode D2.
2. a kind of earth source heat pump unit management system with remote automatic control function as described in claim 1, special
Sign is that the codan includes sensors X 1, and the pin 1 of sensors X 1 passes through inductance L1 connection power supply VCC, sensing
The pin 2 of device X1 be separately connected one end of inductance L2, the upper end of Transient Suppression Diode VD1, capacitor C1 one end, sensors X 1
Pin 3, the lower end of Transient Suppression Diode VD1, one end of capacitor C2 be all connected with GND1, the other end, the capacitor C2 of capacitor C1
The other end be all connected with the earth, one end of the other end connection capacitor C3 of inductance L2, the other end of capacitor C3 connects GND2；
The voltage-current converter circuit includes resistance R8, the output end of one end connection operational amplifier AR2 of resistance R8, resistance
The other end of R8 is separately connected one end of the inverting input terminal of operational amplifier AR3, resistance R11, the same phase of operational amplifier AR3
Input terminal is separately connected one end of one end of resistance R12, resistance R10, and the output end of operational amplifier AR3 connects the one of resistance R9
The collector at end, the base stage of the other end connecting triode Q1 of resistance R9, triode Q1 connects voltage+5V, the hair of triode Q1
Emitter-base bandgap grading is separately connected one end of the other end of resistance R10, resistance R13, and the other end of resistance R13 is separately connected the another of resistance R11
One end, resistance R14 one end, one end of resistance R14 is connected to PLC programmable controller I/O interface, the anode of diode D2,
The other end of resistance R12, the other end of resistance R14 are all connected with GND2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920272821.9U CN209215928U (en) | 2019-03-05 | 2019-03-05 | A kind of earth source heat pump unit management system with remote automatic control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920272821.9U CN209215928U (en) | 2019-03-05 | 2019-03-05 | A kind of earth source heat pump unit management system with remote automatic control function |
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| Publication Number | Publication Date |
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| CN209215928U true CN209215928U (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920272821.9U Expired - Fee Related CN209215928U (en) | 2019-03-05 | 2019-03-05 | A kind of earth source heat pump unit management system with remote automatic control function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123800A (en) * | 2019-12-31 | 2020-05-08 | 武汉卓目科技有限公司 | Serial multi-channel power distribution switch control circuit |
| CN116610058A (en) * | 2023-06-02 | 2023-08-18 | 长沙非同节能科技有限公司 | Energy-saving operation control system of air energy heat pump |
-
2019
- 2019-03-05 CN CN201920272821.9U patent/CN209215928U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123800A (en) * | 2019-12-31 | 2020-05-08 | 武汉卓目科技有限公司 | Serial multi-channel power distribution switch control circuit |
| CN116610058A (en) * | 2023-06-02 | 2023-08-18 | 长沙非同节能科技有限公司 | Energy-saving operation control system of air energy heat pump |
| CN116610058B (en) * | 2023-06-02 | 2024-01-23 | 长沙非同节能科技有限公司 | Energy-saving operation control system of air energy heat pump |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190806 Termination date: 20200305 |
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| CF01 | Termination of patent right due to non-payment of annual fee |