CN108302239A - A kind of MBUS control circuits and its control method for thermostat valve - Google Patents
A kind of MBUS control circuits and its control method for thermostat valve Download PDFInfo
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- CN108302239A CN108302239A CN201711049145.0A CN201711049145A CN108302239A CN 108302239 A CN108302239 A CN 108302239A CN 201711049145 A CN201711049145 A CN 201711049145A CN 108302239 A CN108302239 A CN 108302239A
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- resistance
- triode
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- microcontroller
- constant
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
Abstract
The present invention provides a kind of MBUS control circuits for thermostat valve, it include the microcontroller for controlling thermostat valve, the rectification circuit of MBUS buses connection, the power supply circuit for powering to microcontroller being connect with rectification circuit, the power supply circuit includes providing the 6mA constant-current sources of element task electric current to microcontroller and providing high current to microcontroller and can receive microcontroller to send the 20mA controllable constant-currents source of signal and the constant-current control circuit of receiving host signal, 20mA controllable constant-currents source includes the control circuit of constant-current source I1 and reception single-chip microcomputer signal, the receiving circuit that the low and high level that host is sent is switched to the low and high level signal that microcontroller can identify is connected on the rectification circuit.The 20mA controllable constant-currents source that the present invention uses is by receiving the data interaction between the completion of slave signal and host, low and high level on host can be converted to slave by used receiving circuit can like the signal of identification, i.e., solve power supply and communication issue between host and slave by two power cords.
Description
Technical field
The invention belongs to control circuit technical fields, and in particular to a kind of for the MBUS control circuits of thermostat valve and its control
Method processed.
Background technology
MBUS is a kind of bus protocol designed exclusively for calorimeter remote data transmission, it is measuring instrumentss data transmission
A kind of digitized important technology has been widely used for the acquisition field of the data such as no source contact such as water, electricity, gas, heat energy meter
It closes.The advantages that MBUS is nonpolarity, easy for construction because of its, is more and more applied, such as the application of the fields such as heat supply and water supply
Very extensively, but all it is only by MBUS for communicating, there are also enterprises to be used to power by MBUS, such as the direct rear ends MBUS
The shortcomings that increase DCDC decompression chips, this scheme is when load current becomes larger, and bus current will appear shake, cause MBUS
Host receives the data of mistake；There are also enterprises to use constant-current source mode, but only uses a constant-current source and electric current is inclined
Greatly, it is when loading lighter the shortcomings that this scheme, high current utilization rate is very low, and energy wastes, and causes damages.
Invention content
The present invention provides a kind of MBUS control circuits for thermostat valve and its control method to overcome above two technology
Defect, communication stability and current utilization rate is greatly improved.
In order to solve the above technical problems, used technical solution：
A kind of MBUS control circuits for thermostat valve include for controlling the whole of the microcontroller of thermostat valve, the connection of MBUS buses
Current circuit, the power supply circuit for powering to microcontroller being connect with rectification circuit, the power supply circuit includes being carried to microcontroller
6mA constant-current sources for element task electric current and provide high current to microcontroller and can receive microcontroller transmission signal 20mA it is controllable
The constant-current control circuit of constant-current source and the receiving host signal being connect with 6mA constant-current sources, 20mA controllable constant-currents source include
The constant-current source I1 of high current is provided with reception single-chip microcomputer signal and controls the control circuit of constant-current source I1, the control circuit includes
The base stage of triode Q4 and triode Q6, the triode Q4 receive the signal that microcontroller is sent, three pole by resistance R6
The emitter of pipe Q4 receives high current by resistance R3 and is exported to resistance R9, the resistance R9 by the collector of triode Q4
It connect with the base stage of triode Q6 and is exported to resistance R7, the resistance R7 by the collector of triode Q6 and connected with constant-current source I1
Connect, the emitter of the triode Q6 connects simulation ground, and the resistance R9 connects simulation ground by resistance R10, the constant-current source I1 with
Rectification circuit connects.
Further, the power supply circuit further includes the receiving host signal being connect with 20mA controllable constant-currents source and provides total
The bus-powered control circuit of line power supply, the bus-powered control circuit includes triode Q5, PMOS tube Q1 and diode
The base stage of D1, the triode Q5 receive single-chip microcomputer signal by resistance R5, and the emitter of the triode Q5 meets simulation ground, institute
The collector of triode Q5 is stated by the G feet of resistance R4 connection PMOS tube Q1 and is connect with the S feet of PMOS tube Q1 by resistance R2,
The D feet of the PMOS tube Q1 are connect with the anode of diode D1, and the resistance R5 connects simulation ground by resistance R8.
Further, the super capacitor control circuit powered when being connected on the microcontroller for powering off, it is described super
Capacitor control circuit includes by the super capacitor C14 capacitor charging circuits connected and capacitor discharging circuit, the capacitor charging
Circuit includes that the base stage of triode Q17, PMOS tube Q15 and diode D15, the triode Q17 pass through resistance R37 and receives master
Machine signal and the G feet that resistance R35 and PMOS tube Q15 are separately connected by the collector of triode Q17, the D of the PMOS tube Q15
Foot receives 5V voltages by resistance R33 and is exported to diode D15 by the S feet of PMOS tube Q15, and the diode D15's is another
One end, which is exported to super capacitor C14, the D feet of another termination PMOS tube Q15 of the resistance R35, the resistance R37, passes through series connection
Resistance R39 ground connection；The capacitor discharging circuit includes triode Q16 and PMOS tube Q14, the resistance R36 receiving hosts letter
Number and exported by the base stage of the triode Q16 by resistance R36 receiving hosts signal and by the collector of triode to
The D feet of the G feet of resistance R34 and PMOS tube Q14, the PMOS tube Q14 receive the voltage of super capacitor C14 outputs and pass through PMOS
The S feet of pipe Q14 export, and the resistance R36 connects simulation ground by concatenated resistance R38.
Further, the power supply circuit output voltage is provided to microcontroller after being converted by DCDC reduction voltage circuits, described
DCDC reduction voltage circuits include DCDC decompression chips, and the 5th pin of the DCDC decompressions chip connects 6mA constant-current sources, the first pin
It is exported to power inductance L1 by capacitance C9, the other end of the power inductance L1 is exported to filter circuit, and second pin connects mould
Quasi- ground, third pin are exported by divider resistance R23 to filter circuit, and the divider resistance R23 connects mould by divider resistance R27
Quasi- ground, the divider resistance R18 that the 4th pin is connect by diode D12 connections with 6mA constant-current sources, the divider resistance R18 are logical
It crosses divider resistance R28 and connects simulation ground, the 4th pin connects simulation ground by capacitance C13.
Further, it is connected on the rectification circuit and the low and high level that host is sent is switched to what microcontroller can identify
The receiving circuit of low and high level signal, the receiving circuit include diode D8, triode Q10 and triode Q12, and described two
Pole pipe D8 is connect with rectification circuit by resistance R14 and by the emitter of resistance R17 and triode Q10, the triode Q10
Collector exported to triode Q12 base stages by resistance R24, the emitter of the triode Q12 connects simulation ground, the resistance
R24 connects simulation ground by resistance R29, and the collector of the triode Q12 receives 3.3V voltages and and microcontroller by resistance R26
It connects and to microcontroller transmission data.
A kind of control method of MBUS control circuits for thermostat valve, includes the following steps,
（1）System electrification, microcontroller control 20mA constant-current sources and close；
（2）Host is sent sends signal by the receiving circuit being connect with MBUS buses, and the serial ports of microcontroller receives receiving circuit
The data of transmission, by the data microcontroller that receives, it is determined whether to enable thermostat valves, when needing to open thermostat valve, microcontroller hair
Control 20mA constant-current sources are opened after the completion of sending reply data；
（3）Whether be closed according to limit switch and motor operating time whether time-out judge whether the switch motion of thermostat valve complete
At；
（4）After completing switch motion, closes 20mA constant-current sources and close, if the serial ports of microcontroller receives new data, enter step
（2）And it repeats the above process.
Further, the step（3）When after the completion to switch motion detection, while circuit stall is detected, and
The unlatching of controlling bus power-supplying circuit.
The MBUS control circuits for thermostat valve that the present invention uses are powered to slave using double constant current source modules, that is, adopted
With 6mA constant-current sources to slave provide element task electric current, when 6mA constant current source current deficiencies by 20mA controllable constant-currents source to from
Machine provides high current；Used 20mA constant-current sources can receive slave signal, and host demodulates slave signal by permanent profit source I1, i.e.,
It completes to be completed at the same time data interaction of the slave to host to slave power supply in 20mA controllable constant-currents source；Used bus-powered control
Circuit can provide bus-powered in 6mA constant-current sources and the source electricity shortage of 20mA controllable constant-currents to slave；Used super electricity
Hold control circuit to power to the back-end when power blackout situation occurs in slave detection, reduces circut breaking and power-off time, solve client
The problem of power blackout situation lower maintenance period occur can not power, increases customer satisfaction degree.
Description of the drawings
Fig. 1 is the analog circuit schematic diagram of the present invention；
In figure：1, rectification circuit；2,6mA constant-current sources；3,20mA controllable constant-currents source；4, bus-powered control circuit；5, DCDC drops
Volt circuit；6, stabilized power source chip circuit；7, receiving circuit；8, super capacitor control circuit；9, constant-current control circuit；10, total
Line is for power detection circuit；11, reverse leakage protects circuit；12, accumulator；13, filter circuit.
Specific implementation mode
With reference to circuit the drawings and specific embodiments, invention is further described in detail.
MBUS control circuits of the present invention for thermostat valve include microcontroller, rectification circuit 1, power supply circuit, storage
It can circuit 12, DCDC reduction voltage circuits 5, filter circuit 13, stabilized power source chip circuit 6, receiving circuit 7, super capacitor control electricity
Road 8, reverse leakage protection circuit 11, accumulator 12 and filter circuit 13, wherein the power supply circuit includes 6mA constant-current sources
2,20mA controllable constant-currents source 3 and bus-powered control circuit 4 and constant-current control circuit 9.
As described in Figure 1, the rectification circuit is connect by two power cords with MBUS buses, wherein the 6mA constant-current sources 2
Fuse F2 is connected by rectification circuit with receiving circuit 7, to be connect with MBUS buses, 3 He of 20mA controllable constant-currents source
Bus-powered control circuit 4 connects fuse F1 by rectification circuit, to be connect with MBUS buses.The 6mA constant-current sources are used
In the operating current for providing basis to microcontroller, including triode Q7 and triode Q8 and diode D9, the triode Q8
Collector connect with rectification circuit by resistance R11, the emitter of the triode Q8 is exported by diode D9 to energy storage
Circuit 12 is simultaneously exported by accumulator to DCDC reduction voltage circuits, and the accumulator 12 is capacitance C2, the capacitance being connected in parallel
The collector of C3 and capacitance C4, the triode Q7 connect rectification circuit, and the base stage of the triode is connect with resistance R11, institute
The base stage for stating triode Q8 and the emitter of triode Q7 connect simulation ground, the size of current of the 6mA perseverances power supply by resistance R16
It is controlled by resistance R11.
20mA controllable constant-currents source includes providing the constant-current source I1 of high current and receiving single-chip microcomputer signal and control constant current
The control circuit of source I1, the constant-current source I1 include triode Q3 and triode Q2, the triode Q2 by resistance R1 with it is whole
Current circuit connects and controls the size of current of constant-current source I1 and exported to diode D7 by the collector of triode Q2, described two
The other end of pole pipe D7 is exported to accumulator 12 and is exported by accumulator to DCDC reduction voltage circuits, the triode Q2's
Base stage is connect with the collector of triode Q3, and the triode Q3 is connect by resistance R7 with control circuit, the triode Q3
Emitter connect with rectification circuit；The control circuit includes triode Q4 and triode Q6, the base of the triode Q4
Pole receives the signal that microcontroller is sent by resistance R6, and the emitter of the triode Q4 receives high current by resistance R3 and leads to
The collector for crossing triode Q4 exports to resistance R9, the resistance R9 and is connect with the base stage of triode Q6 and by triode Q6's
Collector is exported to resistance R7, and the emitter of the triode Q6 connects simulation ground, and the resistance R9 connects simulation by resistance R10
Ground.When it is high level that the microcontroller that resistance R6 is received, which sends signal, triode Q4 cut-offs so that triode Q6 cut-offs, to
No current is set to pass through diode D7；When received signal is low level, triode Q4 conductings so that triode Q6 conductings, from
And so that constant-current source I1 is passed through DCDC reduction voltage circuits and power to microcontroller, while host can be by the demodulation of constant-current source I1 received signals
For TTL signal, slave is completed to the data interaction between host.
As shown in Figure 1, the constant-current control circuit 9 includes triode Q9 and diode D10, the current collection of the triode Q9
By resistance R12 receiving host signals, the emitter of the triode Q9 is connect and defeated by resistance R15 with diode D10 for pole
Go out to DCDC reduction voltage circuits, the base stage of wherein triode Q9 connects simulation ground, and resistance R12 connects simulation ground by divider resistance R13.
The bus-powered control circuit is connect with 20mA controllable constant-currents source, for by after receiving host signal to monolithic
Machine offer is bus-powered, including triode Q5, PMOS tube Q1 and diode D1, the base stage of the triode Q5 pass through resistance R5
Single-chip microcomputer signal is received, the emitter of the triode Q5 connects simulation ground, and the collector of the triode Q5 is connected by resistance R4
It connects the G feet of PMOS tube Q1 and is connect with the S feet of PMOS tube Q1 by resistance R2, the D feet of the PMOS tube Q1 are with diode D1's
Anode connects, and the resistance R5 connects simulation ground by resistance R8.When divider resistance R5 and resistance R8 receptions are high level signal
When, triode Q5 forms conducting, and is divided by resistance R2 and resistance R4 so that PMOS tube Q1 conductings, total to carry out to the back-end
Line is powered；When divider resistance R5 and resistance R8 receptions are high level signal, triode Q5 forms cut-off, bus-powered to cut
It is disconnected.
As shown in Figure 1, the output voltage of the power supply circuit exports after being converted by DCDC reduction voltage circuits to microcontroller,
The DCDC reduction voltage circuits 5 include that DCDC is depressured chip, and the DCDC is depressured the 5th pin VIN connection 6mA constant-current sources of chip,
First pin BST is exported by capacitance C9 to power inductance L1, and the other end of the power inductance L1 is exported to filter circuit 13,
The second pin GND of the DCDC decompressions chip connects simulation ground, and third pin FB is exported by divider resistance R23 to filtered electrical
Road, the divider resistance R23 connect simulation ground by divider resistance R27, and the 4th pin EN is permanent by diode D12 connections and 6mA
The divider resistance R18, the divider resistance R18 of stream source connection connect simulation ground by divider resistance R28, and the 4th pin EN is logical
It crosses capacitance C13 and connects simulation ground；Wherein the filter circuit 13 include the capacitance C12 being together in parallel being connect with power inductance L1 and
Capacitance C10, the capacitance C12 and capacitance C10 exported to capacitance C7 by parallel power magnetic bead FB1 and power magnetic bead FB2 and
Capacitance C11, the capacitance C7 and capacitance C11 Parallel opertations to microcontroller are powered.The power supply circuit is filled to accumulator
Electricity, when circuit voltage reduces, DCDC is depressured chip and starts to work and filter ripple in output voltage by filter circuit, simultaneously
The 4th pin EN is controlled by resistance R18 and resistance R28 and diode D12, is prevented when circuit voltage drops to relatively low
DCDC decompression chips, which further drag down voltage, causes circuit operation irregularity.
The super capacitor control circuit 8 powered when as shown in Figure 1, being connected on the microcontroller for powering off and with it is super
Reverse leakage protection circuit 11 of the connection of capacitor control circuit 8 for shielding when slave electric leakage, the super capacitor control
Circuit processed includes by the super capacitor C14 capacitor charging circuits connected and capacitor discharging circuit, the capacitor charging circuit packet
The base stage for including triode Q17, PMOS tube Q15 and diode D15, the triode Q17 passes through resistance R37 receiving host signals
And the G feet of resistance R35 and PMOS tube Q15 are separately connected by the collector of triode Q17, the D feet of the PMOS tube Q15 pass through
Resistance R33 receives 5V voltages and is exported to diode D15 by the S feet of PMOS tube Q15, and the other end of the diode D15 is defeated
Go out to super capacitor C14, the D feet of another termination PMOS tube Q15 of the resistance R35, the resistance R37 and passes through concatenated resistance
R39 is grounded；The capacitor discharging circuit includes triode Q16 and PMOS tube Q14, and the resistance R36 receiving hosts signal simultaneously leads to
The base stage of the triode Q16 is crossed to be exported by resistance R36 receiving hosts signal and by the collector of triode to output extremely
The D feet of the G feet of resistance R34 and PMOS tube Q14, the PMOS tube Q14 receive the voltage of super capacitor C14 outputs and pass through PMOS
The S feet of pipe Q14 export, and the resistance R36 connects simulation ground by concatenated resistance R38；The reverse leakage protection circuit 11 wraps
Include diode D13, the resistance R30 being connect with super capacitor control circuit and the triode Q13 for receiving signal, the triode
The base stage of Q13 is connect with diode D13 and resistance R30, and collector and the regulated power supply chip circuit of the triode Q13 connect
It connects, to shield in the case where triode Q13 is connected, the emitter of the triode Q13 connects simulation ground；It is described steady
Determine power supply chip circuit to connect with microcontroller using power supply chip U1 and shunt capacitance C5, capacitance C6 and capacitance C8, realize steady
Fixed power supply, the capacitance C8 receive the input of 3.3V voltages.
It can be identified as shown in Figure 1, be connected on the rectification circuit low and high level that host is sent switching to microcontroller
Low and high level signal receiving circuit 7 and provide the bus-powered detection circuit 10 that is detected of voltage to MBUS buses,
The receiving circuit 7 include diode D8, triode Q10 and triode Q12, the diode D8 by resistance R14 with it is whole
Current circuit connects and by the emitter of resistance R17 and triode Q10, and the collector of the triode Q10 is defeated by resistance R24
Go out to triode Q12 base stages, the emitter of the triode Q12 connects simulation ground, and the resistance R24 connects simulation by resistance R29
The collector on ground, the triode Q12 receives 3.3V voltages by resistance R26 and is connect with microcontroller and send number to microcontroller
According to；When bus circuit does not communicate, since diode D8 has pressure drop, the voltage of capacitance C1 to be slightly less than bus voltage, three poles
The emitter voltage of pipe Q10 is less than base voltage, and triode Q10 cut-offs, triode Q12 base stages are low level at this time, to three
Pole pipe Q12 cut-offs, it is high level to lead to the MCU_RX signals sent to slave；When bus communication, bus voltage can decline
12V or so, at this time the emitter voltage of triode Q10 be more than base voltage, triode Q10 conducting, the base of triode Q12 at this time
Pole receiving voltage makes triode Q12 be connected, and the MCU_RX signals to be sent to slave are low level, complete host and slave
Between data exchange；The bus-powered detection circuit 10 includes triode Q11, and the collector of the triode Q11 passes through
Resistance R20 is pulled upward to 3.3V voltages, and bus voltage generates partial pressure by resistance R21 and R25, which is reached by resistance R22
The base stage of triode Q11, bus has electricity, and then triode Q11 is connected, and EPOWER is low level, and without electricity, then triode Q11 is cut bus
Only, EPOWER is high level.The emitter of the triode Q11 connects simulation ground.
Present invention simultaneously provides a kind of control methods of the MBUS control circuits for thermostat valve, include the following steps,（1）
System electrification, microcontroller control 20mA constant-current sources and close；（2）Host is sent to be sent by the receiving circuit being connect with MBUS buses
Signal, the serial ports of microcontroller receive the data of receiving circuit transmission, and by the data microcontroller that receives, it is determined whether to enable temperature controls
Valve, when needing to open thermostat valve, microcontroller controls 20mA constant-current sources opening after the completion of sending reply data；（3）According to limit
Whether switch, which is closed, and whether motor operating time is overtime judges whether the switch motion of thermostat valve is completed；（4）Complete switch
After action, closes 20mA constant-current sources and close, if the serial ports of microcontroller receives new data, enter step（2）And repeat above-mentioned mistake
Journey.
Operation principle：The MBUS control circuits for thermostat valve that the present invention uses complete host using two power cords
Data interaction between slave and power supply；It is powered, i.e., is carried to slave using 6mA constant-current sources to slave using double constant current source modules
For element task electric current, high current is provided to slave by 20mA controllable constant-currents source when 6mA constant current source current deficiencies, is used
Bus-powered control circuit can in 6mA constant-current sources and the source electricity shortage of 20mA controllable constant-currents, provided to slave it is bus-powered,
It is powered to the back-end by super capacitor control circuit when short-circuit conditions occurs in slave detection simultaneously；Used 20mA constant-current sources
On control circuit receive slave signal, host demodulates slave signal by permanent profit source I1, completes to slave power supply while complete
At the data interaction of slave to host, to control the switch motion of thermostat valve；The height that used receiving circuit sends host
Low level switchs to the low and high level signal that microcontroller can identify, completes the data interaction between host and slave.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (7)
1. a kind of MBUS control circuits for thermostat valve, include for controlling the microcontroller of thermostat valve, MBUS buses connect
Rectification circuit (1), the power supply circuit for powering to microcontroller being connect with rectification circuit, which is characterized in that the power supply electricity
Road includes providing the 6mA constant-current sources (2) of element task electric current to microcontroller and providing high current to microcontroller and can receive monolithic
Machine sends the 20mA controllable constant-currents source of signal（3）And the constant-current control circuit for the receiving host signal being connect with 6mA constant-current sources
（9）, 20mA controllable constant-currents source includes providing the constant-current source I1 of high current and receiving single-chip microcomputer signal and control constant-current source I1
Control circuit, the control circuit includes triode Q4 and triode Q6, and the base stage of the triode Q4 is connect by resistance R6
The signal that microcontroller is sent is received, the collector of the triode Q4 receives high current by resistance R3 and passes through the hair of triode Q4
Emitter-base bandgap grading exports to resistance R9, the resistance R9 and connect with the base stage of triode Q6 and exported to electricity by the collector of triode Q6
R7 is hindered, the resistance R7 is connect with constant-current source I1, and the emitter of the triode Q6 connects simulation ground, and the resistance R9 passes through resistance
R10 connects simulation ground, and the constant-current source I1 is connect with rectification circuit.
2. the MBUS control circuits according to claim 1 for thermostat valve, which is characterized in that the power supply circuit also wraps
It includes the receiving host signal being connect with 20mA controllable constant-currents source and bus-powered bus-powered control circuit is provided（4）, described
Bus-powered control circuit includes that triode Q5, PMOS tube Q1 and diode D1, the base stage of the triode Q5 pass through resistance
R5 receives single-chip microcomputer signal, and the emitter of the triode Q5 connects simulation ground, and the collector of the triode Q5 passes through resistance R4
The G feet of connection PMOS tube Q1 are simultaneously connect by resistance R2 with the S feet of PMOS tube Q1, D feet and the diode D1 of the PMOS tube Q1
Anode connection, the resistance R5 by resistance R8 connect simulation ground.
3. the MBUS control circuits according to claim 1 for thermostat valve, which is characterized in that connected on the microcontroller
It is useful for the super capacitor control circuit powered when power-off（8）, the super capacitor control circuit includes passing through super capacitor C14
The capacitor charging circuit and capacitor discharging circuit of connection, the capacitor charging circuit include triode Q17, PMOS tube Q15 and
The base stage of diode D15, the triode Q17 are by resistance R37 receiving hosts signal and pass through the collector of triode Q17 point
Not Lian Jie resistance R35 and PMOS tube Q15 G feet, the D feet of the PMOS tube Q15 receive 5V voltages by resistance R33 and pass through
The S feet of PMOS tube Q15 are exported to diode D15, and the other end of the diode D15 is exported to super capacitor C14, the resistance
The D feet of another termination PMOS tube Q15 of R35, the resistance R37 are grounded by concatenated resistance R39；The capacitor discharging circuit
Including triode Q16 and PMOS tube Q14, the resistance R36 receiving hosts signal and base stage by the triode Q16 passes through
Resistance R36 receiving hosts signal simultaneously exports the G feet to resistance R34 and PMOS tube Q14, the PMOS by the collector of triode
The D feet of pipe Q14 receive the voltage of super capacitor C14 outputs and are exported by the S feet of PMOS tube Q14, and the resistance R36 passes through string
The resistance R38 of connection connects simulation ground.
4. the MBUS control circuits according to claim 1 for thermostat valve, which is characterized in that the power supply circuit output
Voltage is provided to microcontroller, the DCDC reduction voltage circuits after being converted by DCDC reduction voltage circuits（5）It is depressured chip including DCDC
（U2）, the 5th pin of the DCDC decompressions chip（VIN）Connect 6mA constant-current sources, the first pin（BST）It is exported by capacitance C9
To power inductance L1, the other end of the power inductance L1 is exported to filter circuit, second pin（GND）Connect simulation ground, third
Pin（FB）It being exported to filter circuit by divider resistance R23, the divider resistance R23 connects simulation ground by divider resistance R27,
4th pin（EN）The divider resistance R18 being connect with 6mA constant-current sources by diode D12 connections, the divider resistance R18 pass through
Divider resistance R28 connects simulation ground, the 4th pin（EN）Simulation ground is connect by capacitance C13.
5. the MBUS control circuits according to claim 1 for thermostat valve, which is characterized in that connect on the rectification circuit
It is connected to the receiving circuit that the low and high level that host is sent is switched to the low and high level signal that microcontroller can identify（7）, described to connect
Receive circuit（7）Pass through resistance R14 and rectified current including diode D8, triode Q10 and triode Q12, the diode D8
Road connects and by the emitter of resistance R17 and triode Q10, the collector of the triode Q10 by resistance R24 export to
The emitter of triode Q12 base stages, the triode Q12 connects simulation ground, and the resistance R24 meets simulation ground, institute by resistance R29
The collector of triode Q12 is stated to receive 3.3V voltages by resistance R26 and connect with microcontroller and to microcontroller transmission data.
6. a kind of control method of MBUS control circuits for thermostat valve, which is characterized in that include the following steps,
（1）System electrification, microcontroller control 20mA constant-current sources and close；
（2）Host is sent sends signal by the receiving circuit being connect with MBUS buses, and the serial ports of microcontroller receives receiving circuit
The data of transmission, by the data microcontroller that receives, it is determined whether to enable thermostat valves, when needing to open thermostat valve, microcontroller hair
Control 20mA constant-current sources are opened after the completion of sending reply data；
（3）Whether be closed according to limit switch and motor operating time whether time-out judge whether the switch motion of thermostat valve complete
At；
（4）After completing switch motion, closes 20mA constant-current sources and close, if the serial ports of microcontroller receives new data, enter step
（2）And it repeats the above process.
7. control method according to claim 6, which is characterized in that the step（3）After the completion to switching motion detection
When, while circuit stall is detected, and the unlatching of controlling bus power-supplying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108874718A (en) * | 2018-09-07 | 2018-11-23 | 瑞纳智能设备股份有限公司 | A kind of low-power consumption isolation type bus takes electric MBUS communication interface circuit |
| CN108989910A (en) * | 2018-09-07 | 2018-12-11 | 瑞纳智能设备股份有限公司 | A kind of low-power consumption bus takes electric MBUS communication interface circuit |
| CN109873627A (en) * | 2018-12-13 | 2019-06-11 | 山东亚华电子股份有限公司 | A kind of delay electrification circuit applied to nursing communicating |
| CN112564724A (en) * | 2020-11-20 | 2021-03-26 | 浙江正泰仪器仪表有限责任公司 | MBUS host computer receiving circuit |
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| CN108874718A (en) * | 2018-09-07 | 2018-11-23 | 瑞纳智能设备股份有限公司 | A kind of low-power consumption isolation type bus takes electric MBUS communication interface circuit |
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| CN109873627A (en) * | 2018-12-13 | 2019-06-11 | 山东亚华电子股份有限公司 | A kind of delay electrification circuit applied to nursing communicating |
| CN112564724A (en) * | 2020-11-20 | 2021-03-26 | 浙江正泰仪器仪表有限责任公司 | MBUS host computer receiving circuit |
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