CN102269445A - Heating system energy-saving control device - Google Patents
Heating system energy-saving control device Download PDFInfo
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- CN102269445A CN102269445A CN2011102010362A CN201110201036A CN102269445A CN 102269445 A CN102269445 A CN 102269445A CN 2011102010362 A CN2011102010362 A CN 2011102010362A CN 201110201036 A CN201110201036 A CN 201110201036A CN 102269445 A CN102269445 A CN 102269445A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention relates to a heating system energy-saving control device which can solve the problems of great waste of electric energy and heat energy wastes in the prior art. According to the technical proposal of the invention, the heating system energy-saving control device comprises a power supply used to supply power for the whole system, a heating system secondary side circulating pump governor and a make-up water pump governor; the heating system energy-saving control device also comprises a control power supply, a controller and a primary side electric control valve, wherein the control power supply is electrically connected with the power supply, the controller is powered by the control power supply, the primary side electric control valve is electrically connected with the controller through a manual and automatic regulation circuit, the heating system secondary side circulating pump governor is electrically connected with the controller through a manual and automatic potential regulation circuit, and the make-up water pump governor is connected with a make-up water start-up circuit. The device provided by the invention can regulate the primary side flow and the secondary side flow of heating pipelines according to the running sate of a heating system, thus reducing the waste of electric energy and heat energy.
Description
Technical field
The present invention relates to a kind of heating system control device, be particularly related to a kind of can be initiatively according to the running status of different heating systems automatically adjust heat supply pipeline primary side flow and secondary side flow, also can judge the heating system energy-saving control device of manually regulating by the scene.
Background technology
China is energy consumption big country, and energy utilization rate is very low, and energy reserves is obviously not enough.The most of area of northern China is long winter time, and for ensureing resident's normal heating, corresponding heating period is just long, and some areas have the time over half all to need heating in the middle of 1 year, and central heating industry has become an industry that energy resource consumption is huge.Like this, under the prerequisite that ensures the normal heating of resident, how to respond the requirement of country, energy-saving and cost-reducing to greatest extent, become the current major subjects of heating enterprise.In order to realize energy-conservation and target environmental protection, the northern area of China or has been carried out central heating, by the central heating center thermal source after boiler heats is circulated a pipe network by a water circulating pump, the effect of heat exchange station then is that the thermal source in pipe network is passed through plate type heat exchanger, secondary pipe network is heated, utilize secondary or three pipe networks to heat to the end user.Current major part newly-built or begun to consider automation control at the heating center of founding a capital, heat exchange center, advanced management such as unmanned, remote monitoring scheme, but also there are problems such as energy waste, extensive management in the heat exchange station that major part is not transformed as yet, mainly show: 1, the startup of water circulating pump/stop, turning round, do not quantize fully, produce a large amount of unnecessary wastes by human factor and be inevitable; 2, because the running in a single day of present water circulating pump will be running at full capacity, and the capacity motor of heat exchange station water circulating pump designs in order to satisfy limit ruuning situation, actual surplus is very big, so not only pipe network continues to bear high pressure, increase the maintenance load of pipe network, and brought a large amount of electric energy and thermal waste again virtually.
Chinese patent notification number CN 201636989U, open day on November 17th, 2010, a kind of heat exchange station pipe network supervising device is disclosed, monitoring system comprises heat exchange station supervising device and several user monitoring devices, heat exchange station supervising device and user monitoring device are the GPRS wireless connections, and heat exchange station and user's heating power operating position is carried out overall monitor.Though the disclosed monitor mode of this technical scheme can play supervisory function bit, but in working control, still have a large amount of wasting phenomenons, heat supply pipeline is still had very big heat waster, all have the problem that the heat supply exchange is not thorough, flow velocity is too fast, heating tube pressure is excessive, heat utilization efficiency is low in the pipeline of primary side and secondary side.
Summary of the invention
The objective of the invention is to solve the startup of above-mentioned prior art heating system control device water circulating pump/stop, turning round, do not quantize to produce a large amount of unnecessary wastes fully, the water circulating pump running at full capacity brings the problem that continues to bear high pressure to pipe network, provide a kind of can be initiatively according to the running status of different heating systems automatically adjust heat supply pipeline primary side flow and secondary side flow, also can judge the heating system energy-saving control device of manually regulating by the scene.
The technical solution adopted for the present invention to solve the technical problems is: a kind of heating system energy-saving control device, comprise power supply to the whole system power supply, heating system secondary side circulating pump speed regulator and small pump speed regulator, described heating system energy-saving control device also includes the control power supply, controller, the primary side electric control valve, described control power supply is electrically connected with power supply, described controller is by the power supply of control power supply, described primary side electric control valve is by manual, auto-adjusting circuit is electrically connected with controller, described heating system secondary side circulating pump speed regulator is connected with the moisturizing start-up circuit by manually being electrically connected with described controller from the electrokinetic potential regulating circuit on the described small pump speed regulator.Be provided with like this, can control the flow velocity that the primary side electric control valve is regulated heating system primary side thermal water source by controller or mode manually, the thermal water source of the feasible heat exchange station of flowing through can carry out sufficient heat exchange in the thermal water source, guarantee that secondary side can obtain sufficient heat, equally by controller or control secondary side circulating pump speed regulator manually, guaranteed the flow velocity of secondary side, guaranteed that secondary side hot water can fully obtain heat exchange in switching station, the adjusting of flow velocity simultaneously can guarantee that also the pipeline of secondary side can not be subjected to excessive impact, the secondary side pipe network can not continue to bear high pressure, reduce the maintenance load of secondary side pipe network, and saved a large amount of electric energy and heat energy virtually again; Be connected with the moisturizing start-up circuit on the small pump speed regulator, so owing to also may occur in order to carry out the situation of sufficient heat exchange secondary side operating pressure deficiency at the secondary side pipe network, so, startup by the control small pump can maintain certain working pressure to guaranteeing the secondary side pipe network, if the secondary side operating pressure is excessive, can stop the pressure that small pump maintains the secondary side pipe network.
As preferably, described heating system secondary side circulating pump speed regulator adopts first frequency converter, described first frequency converter is electrically connected with heating system secondary side circulating pump by the first contactor 1C, described first frequency converter is electrically connected with heating system secondary side spare circulating pump by the second contactor 2C, described small pump speed regulator adopts second frequency converter, described second frequency converter is electrically connected with small pump by the 3rd contactor 3C, described second frequency converter is electrically connected the coil interlocking of the coil of the described first contactor 1C and the described second contactor 2C by the 4th contactor 4C with standby small pump.Adopt frequency converter can carry out speed governing to circulating pump motor by the mode of VFC as speed regulator, the employing frequency control has the following advantages: 1. frequency converter can be realized stepless stepless speed control, 2. vector frequency converter can be simulated the speed adjusting performance approximate with dc motor, 3. frequency converter can be realized the soft start and soft stop of motor, and detent torque is big, 4. its power factor of frequency converter is close to 1, reduce circuit, transformer loss, 5. but because the soft start motor, the transformer capacity of the comparable direct startup of transformer capacity is little, 6 flows are directly proportional with its rotating speed, cube being directly proportional of shaft power and its rotating speed, principle is satisfying under the process conditions in view of the above, suitably reduces rotating speed and can reach energy-saving effect.The first contactor 1C and the second contactor 2C interlocking have guaranteed that also secondary side spare circulating pump and secondary side circulating pump can not start simultaneously simultaneously, realize that one is equipped with the setting of a usefulness.
As preferably, describedly manually comprise first selector switch from the electrokinetic potential regulating circuit, described first selector switch comprises stiff end, automatic end and manual end, the V1 terminal of described first frequency converter is electrically connected with the stiff end of described first selector switch, the manual end of described first selector switch is electrically connected with the sliding end that becomes of variable resistor R1, the end of described variable resistor R1 is electrically connected with the VR terminal of first frequency converter, the other end of described variable resistor R1 is electrically connected with the CM terminal of first frequency converter by resistance R 2, the CM terminal of described first frequency converter is electrically connected with an end of resistance R 3, the other end of described resistance R 3 is electrically connected with the automatic end of controller and described first selector switch, and described controller is electrically connected with the two ends of resistance R 3.In first frequency converter of selecting for use, the first frequency converter terminal CM is a public terminal, the first frequency converter terminal V1 is the voltage signal input terminal, the first frequency converter terminal VR is the rate signal power supply, if with the first selector switch gating automatic end, then controller is communicated with the first frequency converter terminal V1 by automatic end, VR and CM, the first frequency converter terminal V1 receives controller signals and carries out automatic frequency-conversion control, if the second selector switch gating is manually held, the first frequency converter terminal V1 then, VR and CM are by resistance R 1, R2, R3 connects, wherein the first frequency converter terminal CM is electrically connected with controller by resistance R 3, the first frequency converter terminal VR is by the variable resistor R1 of series connection, resistance R 2, R3 is electrically connected with controller, at this moment, the variable resistor R1 of series connection, resistance R 2, the R3 resistance value is constant, the first frequency converter terminal V1 is connected back and resistance R 2 by the manual end of first selector switch with the sliding end that becomes of variable resistor R1, R3 series connection admission controller is given, this moment, the first frequency converter terminal V1 was adjustable to the resistance between the controller, the user only need regulate the resistance of variable resistor R1 can adjust the electric potential signal that V1 receives, and reaches the purpose of control first frequency converter.
As preferably, the coil of the described first contactor 1C and the second contactor 2C normally-closed contact, relay K 3 normally-closed contacts, the series connection of relay K 2 normally opened contacts constitutes the first contactor coil circuit, the coil of the described first contactor 2C is by the first contactor 1C normally-closed contact and relay K 2 normally-closed contacts, the series connection of relay K 3 normally opened contacts constitutes the second contactor coil circuit, the described first contactor coil circuit with after the described second contactor coil circuit is in parallel by main contactor C1 normally opened contact and power turn-on, described first frequency converter is connected with power supply by main contactor C1, and the coil of described main contactor C1 is connected with power supply by relay K 1 normally opened contact.Be provided with like this, when relay K 1 normally opened contact is communicated with, the coil of main contactor C1 gets, the conducting of main contactor C1 normally opened contact, simultaneously, the conducting of main contactor C1 normally opened contact, at this moment, because the second contactor 2C normally-closed contact, relay K 3 normally-closed contacts, the series connection of relay K 2 normally opened contacts constitutes the first contactor coil circuit, the coil of the described first contactor 2C is by the first contactor 1C normally-closed contact and relay K 2 normally-closed contacts, the series connection of relay K 3 normally opened contacts constitutes the second contactor coil circuit, the described first contactor coil circuit is in parallel with the described second contactor coil circuit, so the coil of the first contactor 1C gets when electric, the inevitable dead electricity of the coil of the second contactor 2C, otherwise also be the same, guaranteed that one of secondary side circulating pump is equipped with a usefulness and can realizes smoothly.
As preferably, the coil of described relay K 1 is electrically connected with the control power supply by latching circuit, the coil of described relay K 2, K3 constitute behind the interlock circuit by selector switch with control power supply and be electrically connected.Be provided with like this, made things convenient for the user to start, stop to control by secondary side circulating pump, the secondary side spare circulating pump of low tension to three-phase five-wire mode, during use, press start button, the coil of relay K 1 gets electric, the latching circuit self-locking, and relay K 1 normally opened contact is communicated with, the coil of main contactor C1 gets electric, the conducting of main contactor C1 normally opened contact; If selector switch is selected the coil of turn-on relay K2, the coil of relay K 2 gets, the normally opened contact closure of relay K 2, the first contactor 1C coil gets electric, and the secondary side circulating pump gets electric startup, and the normally-closed contact of relay K 2 disconnects, the coil of relay K 3 and relay K 2 interlockings, so the coil of relay K 3 must not electricity, the second contactor coil circuit disconnects, the second contactor 2C coil losing electricity, the secondary side spare circulating pump stops; If selector switch is selected the coil of turn-on relay K3, the coil of relay K 3 gets, the normally opened contact closure of relay K 3, the second contactor 2C coil gets electric, and the secondary side spare circulating pump gets electric startup, and the normally-closed contact of relay K 3 disconnects, the coil of relay K 2 and relay K 3 interlockings, so the coil of relay K 2 must not electricity, the first contactor 1C coil circuit disconnects, the first contactor 1C coil losing electricity, the secondary side circulating pump stops; Finish the setting that secondary side circulating pump and secondary side spare circulating pump one are equipped with a usefulness.
As preferably, the coil of described relay K 1, K2, K3 all is parallel with indicator lamp, and the coil of described contact K1, K2, K3 all is in series with normally closed push button switch.If want to stop fully secondary side circulating pump or secondary side spare circulating pump, pressing stop button cuts off the power supply to the coil of relay K 1 and gets final product, if want to stop the secondary side circulating pump, only need press stop button cuts off the power supply to the coil of relay K 2 and gets final product, if want to stop the secondary side spare circulating pump, only need press stop button and the coil of relay K 3 is cut off the power supply get final product, whether coil that the coil of relay K 1, K2, K3 all is parallel with the clear and definite indicating relay K1 of indicator lamp energy, K2, K3.
As preferably, described moisturizing start-up circuit comprises moisturizing relay K 4, K5, the K6 and second selector switch, the coil of described moisturizing relay K 4 is electrically connected with controller, the stiff end of described second selector switch is electrically connected with the CM terminal of second frequency converter, described moisturizing relay K 4 normally opened contacts one end is electrically connected with the S1 terminal of second frequency converter, the described moisturizing relay K 4 normally opened contact other ends are electrically connected with the CM terminal of second frequency converter by the automatic end of second selector switch, described moisturizing relay K 5 normally opened contacts and moisturizing relay K 6 normally-closed contacts series connection back and hand push button A1 formation in parallel manual circuit, the S1 terminal of described second frequency converter is communicated with the CM terminal of second frequency converter by the manual end of manual circuit and selector switch, described moisturizing relay K 5, the coil of K6 is electrically connected with pressure meter switch, and described pressure meter switch is arranged on the secondary side of heating system.Be provided with like this, electric if moisturizing relay K 4 gets when selecting the switch conduction automatic end, at this moment, and moisturizing relay K 4 normally opened contact closures, the CM terminal of second frequency converter is communicated with the terminal of the S1 of second frequency converter, the action of second frequency converter, the moisturizing of secondary side pipe network; When selecting switch conduction manually to hold, as long as pin hand push button A1, the CM terminal of second frequency converter promptly is communicated with the terminal of the S1 of second frequency converter, and second frequency converter moves, the moisturizing of secondary side pipe network; Because the coil of moisturizing relay K 5, K6 is electrically connected with pressure meter switch, so record the coil of the excessive then moisturizing relay K of pressure value 5 gets when pressure meter switch, the normally opened contact closure of relay K 5, the CM terminal of second frequency converter promptly is communicated with the terminal of the S1 of second frequency converter, the action of second frequency converter, the moisturizing of secondary side pipe network; The coil that records the too small then moisturizing relay K of pressure value 6 when pressure meter switch gets, the normally-closed contact of relay K 6 disconnects, the terminal of the CM terminal of second frequency converter and the S1 of second frequency converter disconnects, and second frequency converter stops action, and the secondary side pipe network stops moisturizing.
As preferably, described manual, auto-adjusting circuit comprises the 3rd selector switch and variable resistor R4, described the 3rd selector switch comprises stiff end, manually hold and automatic end, the signal input part of described primary side electric control valve is electrically connected with the stiff end of the 3rd selector switch, the manual end of described the 3rd selector switch is electrically connected with the sliding end that becomes of variable resistor R4, the termination control power supply of described variable resistor R4, the other end ground connection of described variable resistor R4, the automatic end of described the 3rd selector switch is electrically connected with controller, and the negative-feedback end of described primary side electric control valve is electrically connected with controller.Be provided with like this, when second selector switch select automatic control end then the primary side magnetic valve receive controller signals and regulate, if, second selector switch is selected manual control end, then can regulate the electric current of input electric control valve by the resistance of regulating variable resistor R4, so can regulate the open angle of electric control valve, the negative-feedback end of primary side electric control valve is electrically connected with controller, form negative-feedback, keep the better stability of a system.
As preferably, the coil of the coil of described the 3rd contactor 3C and described the 4th contactor 4C is electrically connected with power supply by the 4th selector switch.The coil that selector switch can only a contactor of gating is set like this, can guarantees that small pump and standby small pump accomplish that one is equipped with a usefulness.
As preferably, described heating system energy-saving control device comprises host computer and slave computer, and described slave computer is a programmable logic controller (PLC), and described host computer is a computer, and described host computer and described slave computer carry out communication by the GPRS module.Be provided with like this, can simultaneously, also can use the slave computer execute-in-place so that the heating system energy-saving control device has the function of operated from a distance, real time record.
The invention has the beneficial effects as follows: the present invention can be initiatively according to the different running statuses of heating system, automatic or manual regulate rotating speed, the small pump of water supply flow velocity, the secondary side circulating pump of primary side startup, stop, play the primary side thermal source is carried out sufficient heat exchange at plate type heat exchanger, keep secondary side thermal source flow velocity, reduce the effect of secondary side ductwork pressure.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is a kind of circuit theory diagrams of secondary side circulating pump among the present invention;
Fig. 3 is a kind of circuit theory diagrams of programmable logic controller (PLC) among the present invention;
Fig. 4 is a kind of circuit theory diagrams of repeat circuit K1 of the present invention, K2, K3;
Fig. 5 is a kind of circuit theory diagrams of small pump among the present invention;
Fig. 6 is a kind of circuit theory diagrams of pressure meter switch among the present invention;
Fig. 7 is a kind of circuit theory diagrams of contactor 3C, 4C among the present invention;
Fig. 8 is a kind of circuit theory diagrams of second frequency converter among the present invention.
Among the figure: 1, programmable logic controller (PLC), 11, first frequency converter, 12, second frequency converter, 13, water supply tank, 14, manually from electrokinetic potential regulating circuit 2, the control power supply, 21, heating system secondary side circulating pump, 22, heating system secondary side spare circulating pump, 23, small pump, 24, standby small pump, 25, the primary side electric control valve, 26, the primary side pipe network, 27, the secondary side pipe network, 28, plate type heat exchanger, 31, the first frequency converter function terminal, 32, the second frequency converter function terminal, 41, first selector switch, 42, second selector switch, 43, the 3rd selector switch, 44, the 4th selector switch, 45, the moisturizing start-up circuit.
The specific embodiment
Below by specific embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
A kind of heating system energy-saving control device (with reference to accompanying drawing 1), present embodiment carries out Energy Saving Control to heating system, heating system comprises by the primary side pipe network 26 of heat supply and direct customer-oriented secondary side pipe network 27, carry out heat exchange by plate type heat exchanger 28 between primary side pipe network 26 and the secondary side pipe network 27, secondary side pipe network 27 is provided with heating system secondary side circulating pump 21 and heating system secondary side spare circulating pump 22, heating system also includes water supply tank 13, water supply tank 13 can carry out moisturizing to secondary side pipe network 27 by small pump 23 or standby small pump 24, and present embodiment comprises the power supply to the whole system power supply, first frequency converter 11, second frequency converter 12, control power supply 2, controller, be arranged on the primary side electric control valve 25 on the primary side pipe network 26; Controller comprises host computer and slave computer, host computer adopts computer to do Long-distance Control, slave computer adopts programmable logic controller (PLC) 1(with reference to accompanying drawing 3), programmable logic controller (PLC) 1 is done field control, adopt the GPRS communication between programmable logic controller (PLC) 1 and the computer, programmable logic controller (PLC) 1 comprises: be used for counting, the analog quantity input and output, the 238-2BC00 module of switching value input and output, the 238-2BC01 module, a GPRS module, a 231-1BD53 module that is used for the analog quantity input, with the CPU214SER module, the 238-2BC00 module, the 231-1BD53 module receives the data of collection in worksite, power supply adopts civil power three-phase five-wire mode inlet wire, control power supply 2 adopts D.C. regulated power supply (with reference to accompanying drawing 2), the PE of control power supply 2, L, N input and corresponding power supply PE, L, the N line connects, the direct current of control power supply 2V1 end output 24V, control power supply 2V2 end output 5V direct current, power supply phase line L1, L2, L3 is successively by air switch JH, overcurrent protection, heat is protected KKR, the input R end of the normally opened contact of main contactor C1 and first frequency converter 11, the S end, T holds electrical connection, the B1 of first frequency converter 11, the B2 end connects the DB potentiometer, the output U end of first frequency converter 11, the V end, the W end is electrically connected with heating system secondary side circulating pump 21 by the first contactor 1C, the output U end of first frequency converter 11, the V end, the W end is electrically connected with heating system secondary side spare circulating pump 22 by the second contactor 2C, the coil of the first contactor 1C and the second contactor 2C normally-closed contact, relay K 3 normally-closed contacts, the series connection of relay K 2 normally opened contacts constitutes the first contactor coil circuit, the coil of the first contactor 2C is by the first contactor 1C normally-closed contact and relay K 2 normally-closed contacts, the series connection of relay K 3 normally opened contacts constitutes the second contactor coil circuit, the first contactor coil circuit with after the second contactor coil circuit is in parallel by main contactor C1 normally opened contact and power turn-on, the coil of main contactor C1 is electrically connected with power supply by relay K 1 normally opened contact and Re Bao normally closed switch KKR, the V1 output of control power supply 2 is electrically connected (with reference to accompanying drawing 4), relay K 2 by button and relay K 1 normally opened contact in parallel with the coil of relay K 1, the coil of K3 is electrically connected with control power supply 2 by selector switch after constituting interlock circuit; The coil of relay K 1, K2, K3 all is parallel with indicator lamp, all is in series with stop button between relay K 1, K2, K3 and the control power supply 2.The first frequency converter function terminal 31 of first frequency converter 11 is by manually being electrically connected with programmable logic controller (PLC) 1 from electrokinetic potential regulating circuit 14, manually comprise first selector switch 41 from electrokinetic potential regulating circuit 14, first selector switch 41 comprises stiff end, automatic end and manual end, the V1 terminal of first frequency converter 11 is electrically connected with the stiff end of first selector switch 41, the manual end of first selector switch 41 is electrically connected with the sliding end that becomes of variable resistor R1, the end of variable resistor R1 is electrically connected with the VR terminal of first frequency converter 11, the other end of variable resistor R1 is electrically connected with the CM terminal of first frequency converter 11 by resistance R 2, the CM terminal of first frequency converter 11 be electrically connected with an end of resistance R 3, the other end of resistance R 3 is electrically connected with the automatic end of the programmable logic controller (PLC) 1 and first selector switch 41, and programmable logic controller (PLC) 1 is electrically connected with the two ends of resistance R 3; Programmable logic controller (PLC) 1 is by 2 power supplies of control power supply, primary side electric control valve 25 comprises the control signal input, the negative-feedback end, the alternating current input, the control input end of primary side electric control valve 25 is by manual, auto-adjusting circuit is electrically connected with programmable logic controller (PLC) 1, manually, auto-adjusting circuit comprises the 3rd selector switch 43 and variable resistor R4, the 3rd selector switch 43 comprises stiff end, manually hold and automatic end, the signal input part of primary side electric control valve 25 is electrically connected with the stiff end of the 3rd selector switch 43, the manual end of the 3rd selector switch 43 is electrically connected with the sliding end that becomes of variable resistor R4, the end of variable resistor R4 with connect control power supply 2 be electrically connected, the other end ground connection of variable resistor R4, in order to prevent the situation of R4 accommodative excess, the divider resistance of also variable resistor R4 and control can being connected between the power supply 2, the automatic end of the 3rd selector switch 43 is electrically connected with programmable logic controller (PLC) 1, the negative-feedback end of primary side electric control valve 25 is electrically connected with programmable logic controller (PLC) 1, the alternating current input of primary side electric control valve 25 is electrically connected with power supply, power supply is by air switch JH, heat is protected the input R end with second frequency converter 12, the S end, the T end is electrically connected (with reference to accompanying drawing 5), the B1 of second frequency converter 12, the B2 end connects the DB potentiometer, the output U end of second frequency converter 12, the V end, the W end is electrically connected with small pump 23 by the 3rd contactor 3C, the output U end of second frequency converter 12, the V end, the W end is electrically connected with standby small pump 24 by the 4th contactor 4C, the 3rd contactor 3C, the coil of the 4th contactor 4C (with reference to accompanying drawing 7) is electrically connected with power supply by the 4th selector switch 44, the second frequency converter function terminal 32 is electrically connected with moisturizing start-up circuit 45, moisturizing start-up circuit 45(is with reference to accompanying drawing 8) comprise moisturizing relay K 4, K5, the K6 and second selector switch 42, relay K 4 coils are electrically connected with programmable logic controller (PLC) 1, the stiff end of second selector switch 42 is electrically connected with the CM terminal of second frequency converter 12, moisturizing relay K 4 normally opened contacts one end is electrically connected with the S1 terminal of second frequency converter 12, the moisturizing relay K 4 normally opened contact other ends are electrically connected with the CM terminal of second frequency converter 12 by the automatic end of second selector switch 42, moisturizing relay K 5 normally opened contacts and moisturizing relay K 6 normally-closed contacts series connection back and hand push button A1 formation in parallel manual circuit, the S1 terminal of second frequency converter 12 is communicated with the CM terminal of second frequency converter 12 by the manual end of manual circuit and selector switch, moisturizing relay K 5, the coil of K6 is electrically connected (with reference to accompanying drawing 6) with pressure meter switch, described pressure meter switch is arranged on the secondary side of heating system.
When present embodiment uses, can be according to the running status of heating system, carry out automatic and manual adjusting, a pipe network of heating system is occurred by thermal source, have a large amount of heats, flow through plate type heat exchanger 28 of primary side pipe network 26 carries out sufficient heat exchange with secondary side pipe network 27, and secondary pipe network heats.For the above process that heats, if do not need primary side excessive for the heating load of pipe network heat supply or primary side pipe network 26, as with the 42 automatic end conductings of second selector switch, then the exportable signal of PLC is to primary side electric control valve 25, opening angle to primary side electric control valve 25 is regulated, and the opening angle of the electric control valve of primary side is fed back to PLC, if the situation of transferring is not satisfactory automatically, then the user can be according to actual conditions, with the second manually end conducting of selector switch 42, regulate variable resistor R4 then, different resistances by variable resistor R4, can regulate by the control power supply 2 variable resistor R4 that flows through and input to the size of current of primary side electric control valve 25, reach the purpose of manual control primary side electric control valve 25; Heating system secondary side circulating pump 21 carries out VFC by first frequency converter 11, with the 41 automatic end conductings of first selector switch, the control signal that the first frequency converter function terminal 31 receives PLC is carried out speed governing to heating system secondary side circulating pump 21, guarantee that heating system secondary side circulating pump 21 can be operated in appropriate rotating speed, flow and the heat of guaranteeing secondary side can both heat with user's needs, if flow does not still meet user's needs after the automatic speed regulation, the user can be with the first manually end conducting of selector switch 41, adjust the resistance value of variable resistor R1 manually, undertaken heating system secondary side circulating pump 21 or heating system secondary side spare circulating pump 22 are carried out speed governing by changing the potential data that first frequency converter 11 reads, change secondary side heat supply flow; Present embodiment is that the control of secondary side pipe network 27 pressure is provided with two kinds of control modes, first kind is auto-control mode, be about to the 3rd selector switch 43 and select the conducting automatic end, at this moment, when PLC sends the coil of signal to moisturizing relay K 4, the coil of moisturizing relay K 4 gets electric, moisturizing relay K 4 normally opened contact closures, conducting between the S1 terminal of second frequency converter 12 and the CM terminal, small pump 23 or standby small pump 24 start; If, automatically control can not be satisfied field demand, then can select conducting manually to hold the 3rd selector switch 43, at this moment, the user can pin hand push button A1 always, small pump 23 or standby small pump 24 keep duty, as decontrol hand push button A1, then small pump 23 or standby small pump 24 quit work, simultaneously at the 3rd selector switch 43 manually in the end conductings, if not according to starting button A1, but pressure meter switch detects the coil of the too small then pressure meter switch of pressure conducting moisturizing relay K 5, the normally opened contact closure of moisturizing relay K 5, the S1 terminal of second frequency converter 12 is to conducting between the CM terminal, and small pump 23 or standby small pump 24 work on, the secondary pipe network moisturizing, pressure is excessive after the secondary pipe network moisturizing, pressure meter switch turn-on relay K6 then, the normally-closed contact end of moisturizing relay K 6 is opened, and the S1 terminal of second frequency converter 12 is separated to the CM terminal, small pump 23 or standby small pump 24 quit work, and secondary pipe network stops moisturizing.When pressing start button, relay coil K1 coil gets, relay K 1 normally opened contact closure, main contactor C1 coil gets, main contactor C1 closure, if the user selects the coil of turn-on relay K2, then the coil of relay K 2 gets electricly, and the indicator lamp that is connected in parallel on the coil of relay K 2 is luminous, the normally-closed contact of relay K 2 disconnects, the normally opened contact closure, the coil losing electricity of relay K 3, the normally-closed contact of relay K 3, normally opened contact keeps, and the first contactor 1C coil gets, the first contactor 1C closure, heating system secondary side circulating pump 21 gets electric work, and the second contactor 2C does not work, and heating system secondary side spare circulating pump 22 continues standby; If the user selects the coil of turn-on relay K3, then the indicator lamp that gets on electric, as to be connected in parallel on relay K 3 coil of the coil of relay K 3 is luminous, the normally-closed contact of relay K 3 disconnects, the normally opened contact closure, the coil losing electricity of relay K 2, the normally-closed contact of relay K 2, normally opened contact keep, the second contactor 2C coil gets, the second contactor 2C closure, heating system secondary side spare circulating pump 22 gets electric work, the first contactor 1C does not work, and heating system secondary side circulating pump 21 is standby; Stop the work of heating system secondary side circulating pump 21 as need, then can press the normally closed push button switch of connecting with relay K 2 coils, the coil losing electricity of relay K 2, the normally opened contact of relay K 2 recover to disconnect, the first contactor 1C dead electricity, heating system secondary side circulating pump 21 quits work; Stop the work of heating system secondary side spare circulating pump 22 as need, then can press the normally closed push button switch of connecting with relay K 3 coils, the coil losing electricity of relay K 3, the normally opened contact of relay K 3 recovers to disconnect, the first contactor 2C dead electricity, heating system secondary side spare circulating pump 22 quits work; As stopping the work of heating system secondary side circulating pump 21 and heating system secondary side spare circulating pump 22 simultaneously, then can press the normally closed push button switch of connecting with relay K 1 coil, the coil losing electricity of relay K 1, the normally opened contact of relay K 1 recovers to disconnect, main contactor C1 dead electricity, heating system secondary side circulating pump 21 and heating system secondary side spare circulating pump 22 quit work simultaneously.The switching of small pump 23 and standby small pump 24 also is same, only need switching selection switch conducting the 3rd contactor 3C or the 3rd contactor 4C be changeable be that practical small pump 23 work also are to use standby small pump 24 to carry out moisturizing.Control except field by using PLC, PLC also can transfer to host computer just in the computer by the GPRS module with various analog input amounts, digital input amount, carry out long-range control by computer, control data is transferred to slave computer just among the PLC by the GPRS module, carry out remote auto control, in this process, computer can carry out record with real-time control data, and convenient in the future the survey checked.
Above-described embodiment is a kind of preferable scheme of the present invention, is not that the present invention is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (10)
1. heating system energy-saving control device, comprise power supply to the whole system power supply, heating system secondary side circulating pump speed regulator and small pump speed regulator, it is characterized in that: described heating system energy-saving control device also includes the control power supply, controller, the primary side electric control valve, described control power supply is electrically connected with power supply, described controller is by the power supply of control power supply, described primary side electric control valve is by manual, auto-adjusting circuit is electrically connected with controller, described heating system secondary side circulating pump speed regulator is connected with the moisturizing start-up circuit by manually being electrically connected with described controller from the electrokinetic potential regulating circuit on the described small pump speed regulator.
2. heating system energy-saving control device according to claim 1, it is characterized in that: described heating system secondary side circulating pump speed regulator adopts first frequency converter, described first frequency converter is electrically connected with heating system secondary side circulating pump by the first contactor 1C, described first frequency converter is electrically connected with heating system secondary side spare circulating pump by the second contactor 2C, described small pump speed regulator adopts second frequency converter, described second frequency converter is electrically connected with small pump by the 3rd contactor 3C, described second frequency converter is electrically connected the coil interlocking of the coil of the described first contactor 1C and the described second contactor 2C by the 4th contactor 4C with standby small pump.
3. heating system energy-saving control device according to claim 2, it is characterized in that: describedly manually comprise first selector switch from the electrokinetic potential regulating circuit, described first selector switch comprises stiff end, automatic end and manual end, the V1 terminal of described first frequency converter is electrically connected with the stiff end of described first selector switch, the manual end of described first selector switch is electrically connected with the sliding end that becomes of variable resistor R1, the end of described variable resistor R1 is electrically connected with the VR terminal of first frequency converter, the other end of described variable resistor R1 is electrically connected with the CM terminal of first frequency converter by resistance R 2, the CM terminal of described first frequency converter is electrically connected with an end of resistance R 3, the other end of described resistance R 3 and controller are electrically connected with the automatic end of described first selector switch, and described controller is electrically connected with the two ends of resistance R 3.
4. heating system energy-saving control device according to claim 2, it is characterized in that: the coil of the described first contactor 1C and the second contactor 2C normally-closed contact, relay K 3 normally-closed contacts, the series connection of relay K 2 normally opened contacts constitutes the first contactor coil circuit, the coil of the described first contactor 2C is by the first contactor 1C normally-closed contact and relay K 2 normally-closed contacts, the series connection of relay K 3 normally opened contacts constitutes the second contactor coil circuit, the described first contactor coil circuit with after the described second contactor coil circuit is in parallel by main contactor C1 normally opened contact and power turn-on, described first frequency converter is connected with power supply by main contactor C1, and the coil of described main contactor C1 is connected with power supply by relay K 1 normally opened contact.
5. heating system energy-saving control device according to claim 4, it is characterized in that: the coil of described relay K 1 is electrically connected with the control power supply by latching circuit, and the coil of described relay K 2, K3 is electrically connected with the control power supply by selector switch after constituting interlock circuit.
6. according to claim 1 or 2 or 3 or 4 described heating system energy-saving control devices, it is characterized in that: the coil of described relay K 1, K2, K3 all is parallel with indicator lamp, and the coil of described contact K1, K2, K3 all is in series with normally closed push button switch.
7. heating system energy-saving control device according to claim 2, it is characterized in that: described moisturizing start-up circuit comprises moisturizing relay K 4, K5, the K6 and second selector switch, the coil of described moisturizing relay K 4 is electrically connected with controller, the stiff end of described second selector switch is electrically connected with the CM terminal of second frequency converter, described moisturizing relay K 4 normally opened contacts one end is electrically connected with the S1 terminal of second frequency converter, the described moisturizing relay K 4 normally opened contact other ends are electrically connected with the CM terminal of second frequency converter by the automatic end of second selector switch, described moisturizing relay K 5 normally opened contacts and moisturizing relay K 6 normally-closed contacts series connection back and hand push button A1 formation in parallel manual circuit, the S1 terminal of described second frequency converter is communicated with the CM terminal of second frequency converter by the manual end of manual circuit and selector switch, described moisturizing relay K 5, the coil of K6 is electrically connected with pressure meter switch, and described pressure meter switch is arranged on the secondary side of heating system.
8. heating system energy-saving control device according to claim 1, it is characterized in that: described manual, auto-adjusting circuit comprises the 3rd selector switch and variable resistor R4, described the 3rd selector switch comprises stiff end, manually hold and automatic end, the signal input part of described primary side electric control valve is electrically connected with the stiff end of the 3rd selector switch, the manual end of described the 3rd selector switch is electrically connected with the sliding end that becomes of variable resistor R4, the end of described variable resistor R4 with connect control power supply be electrically connected, the other end ground connection of described variable resistor R4, the automatic end of described the 3rd selector switch is electrically connected with controller, and the negative-feedback end of described primary side electric control valve is electrically connected with controller.
9. heating system energy-saving control device according to claim 2 is characterized in that: the coil of the coil of described the 3rd contactor 3C and described the 4th contactor 4C is electrically connected with power supply by the 4th selector switch.
10. according to claim 1 or 2 or 3 described heating system energy-saving control devices, it is characterized in that: described heating system energy-saving control device comprises host computer and slave computer, described slave computer is a programmable logic controller (PLC), described host computer is a computer, and described host computer and described slave computer carry out communication by the GPRS module.
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| CN102269445B (en) | 2013-08-07 |
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