CN201795575U - Energy-saving system of central air conditioner - Google Patents
Energy-saving system of central air conditioner Download PDFInfo
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- CN201795575U CN201795575U CN2010202755111U CN201020275511U CN201795575U CN 201795575 U CN201795575 U CN 201795575U CN 2010202755111 U CN2010202755111 U CN 2010202755111U CN 201020275511 U CN201020275511 U CN 201020275511U CN 201795575 U CN201795575 U CN 201795575U
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- circulating pump
- control circuit
- circuit
- frequency converter
- pump motor
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Abstract
The utility model discloses an energy-saving system of a central air conditioner, which comprises an electrical primary loop and an electrical secondary loop, wherein the output end of a data acquisition sensor of the electrical primary loop is connected with a controller of the electrical secondary loop; a control circuit of the electrical primary loop comprises an air break switch, an alternating current contactor I, a thermal relay and a circulating pump motor, which are sequentially connected with a main loop circuit, as well as a frequency converter and an alternating current contactor II; the controller of the electrical secondary loop is sequentially connected with an intermediate relay, the alternating current contactor II and the frequency converter through conducting wires; and the controller is further sequentially connected with the intermediate relay, the alternating current contactor I, the thermal relay and the circulating pump motor through the conducting wires. The controller of the electrical secondary loop is used for comparing the set temperature value with the acquired temperature difference value, outputting a control signal to the frequency converter and adjusting the rotational speed of the circulating pump motor through the frequency converter, thereby leading the temperature difference of water to be constant at the optimal point, achieving the best effect of high-efficient energy-saving operation and saving power by 20%-60%.
Description
Technical field
The utility model relates to a kind of central air-conditioning power saving apparatus.
Background technology
The installed capacity of central air-conditioning refrigeration system refrigeration duty generally all designs by satisfying summer high ambient temperature.Owing to season, reach the variation of customer charge round the clock, the actual use heat load of air-conditioning is low more than design (calculated) load, in fact the time that the design maximum refrigeration duty occurs, it is the oepration at full load the sands are running out, more time is to move under underload, the central air-conditioning chilled water system generally adopts the constant flow method of operation, consequently for satisfying the big refrigeration duty refrigeration requirement of a small amount of time, and make the most time water yield carry the superfluous state that operates in, be that water system operates in the little temperature difference state of big flow, cause very large waste of energy.
Summary of the invention
The purpose of this utility model is: at the problem of above-mentioned existence, provide a kind of central air-conditioning power saving apparatus.
The utility model comprises main loop circuit, electric primary circuit and electric secondary circuit; Described main loop circuit is connected with circulating pump; Described electric primary circuit comprises current sensor, voltage sensor, temperature sensor, and a control circuit; Described current sensor, voltage sensor input are connected with main loop circuit respectively, and temperature sensor inputs is separately positioned on the water inlet and the delivery port of circulating pump; A described control circuit comprises the air switch that is connected in series successively with main loop circuit, A.C. contactor I, electrothermal relay, circulating pump motor; No. one time control circuit also comprises frequency converter, the A.C. contactor II that is connected in successively between air switch and the circulating pump motor;
Described electric secondary circuit comprises that PLC controller and ten thousand turn-ofves close, and described ten thousand turn-ofves close and are provided with economize on electricity gear and bypass gear and stop gear; Be in the economize on electricity gear when ten thousand turn-ofves close, PLC controller input is connected with current sensor, voltage sensor, temperature sensor inputs respectively; The PLC controller output end connects auxiliary reclay, A.C. contactor II, frequency converter by lead successively; The PLC controller output end also connects auxiliary reclay, A.C. contactor I, electrothermal relay, circulating pump motor by lead successively; Be in the bypass gear when ten thousand turn-ofves close, the PLC controller output end disconnects with the switch that is connected of above-mentioned auxiliary reclay.The central air-conditioning power saving apparatus is not had an effect, and enters the civil power mode and moves, and does not influence the normal use of equipment.When stopping gear when ten thousand turn-ofves close to be in, whole central air conditioner system is closed.
In the said apparatus, the controller of described electric secondary circuit outputs a control signal to frequency converter according to the temperature approach of its setting and the water inlet of the circulating pump of being gathered and the comparison value of the temperature difference of delivery port, and the rotating speed by frequency converter adjustment circulating pump motor.Make the temperature difference of water constant, reach the optimum efficiency of energy-efficient operation at best point.
Further be, circulating pump has five in the said system, and No. one time control circuit comprises five air switches, five A.C. contactors, five electrothermal relays; Main loop circuit respectively and be connected in series successively between each circulating pump motor and form first group of control circuit, second group of control circuit, the 3rd group of control circuit, the 4th group of control circuit, the 5th group of control circuit.Each group control circuit comprises an air switch that is connected successively with main loop circuit, an A.C. contactor, an electrothermal relay; In first group of control circuit, air switch also connects frequency converter, A.C. contactor II successively by lead;
Controller also connects man-machine interface by communication interface, and described man-machine interface comprises that the real-time parameter of electric current, voltage, temperature shows, and energy conservation starting, shut-down operation key.Display screen by man-machine interface shows work information parameters such as electric current, voltage, temperature in real time, can also realize the long-range monitor function to system, carries out Long-distance Control and regulates.Further be, in the said system with five groups of control circuits of five corresponding connections of circulating pump motor in, also be connected in parallel to the gauge tap that is connected with the signaling switch of man-machine interface energy conservation starting, shut-down operation key.When the controller in the electric secondary circuit is controlled energy-saving circuit automatically and broken down, can enter energy conservation model by the man-machine interface start-up system.
Adopt the central air-conditioning power saving apparatus, according to the temperature variations of water inlet and water outlet, under the situation of the normal operation of assurance system, adjust the rotating speed of pump automatically by control circuit, have excellent adjusting function and power savings, embedded central controller, lcd touch system etc.Regulate in real time according to data automatic centerings such as detected temperature, electric current, voltage centre air-conditioning system running status, the air conditioner water circulatory system, cooling tower system, coil system are worked as required, improve system effectiveness, saves energy.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the novel electric primary circuit of a utility model connection diagram.
Fig. 2 is a control circuit connection diagram of the novel electric primary circuit of the utility model.
Fig. 3 is the PLC controller wiring schematic diagram of electric secondary circuit.
Fig. 4 is the switching value spread signal control section wiring schematic diagram of electric secondary circuit.
Fig. 5 be in the electric secondary circuit ten thousand turn-ofves close with electric primary circuit in the connection diagram of circulating pump motor.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Electric primary circuit connection diagram shown in Fig. 1, main loop circuit connects the input of kilowatt-hour meter KW.H, voltage sensor TV, the input of current sensor TA, a control loop respectively by lead.A control loop as shown in Figure 1, 2, main loop circuit connects air switch (QF1, QF2, QF3, QF4, QF5, QF6 respectively by lead, by the corresponding respectively motor (M1, M2, M3, M4, M5) that connects A.C. contactor (KM1, KM2, KM3, KM4, KM5), electrothermal relay (FR1, FR2, FR3, FR4, FR5), 5 circulating pump correspondences of lead, air switch QF1 also connects frequency converter UF1, A.C. contactor KMO, circulating pump motor M1 by lead to above-mentioned air switch (QF1, QF2, QF3, QF4, QF5) successively successively; Air switch QF6 connects isolating transformer BLK successively by lead, Switching Power Supply A/D, and Switching Power Supply is the man-machine interface power supply of electric current, voltage, temperature sensor and the electric secondary circuit of electric primary circuit.
The PLC controller wiring schematic diagram of electric secondary circuit as described in Figure 3.Its port x O, X1, X2, X3, X4, X5 connect energy saver mode switching signal input port SW1, bypass mode switching signal input port SW2, energy conservation starting switching signal input port SB11, energy-conservation shutdown switch signal input port SB12, the A.C. contactor KMO that is connected with frequency converter, frequency converter failure transformer TC cut-off signal respectively; Port x 6, X7 can connect manual start and stop actuating signal respectively for reserving port.Port C0 connects the main circuit loop, and port Y0 connects the frequency converter of control circulating pump motor rotational frequency by A.C. contactor KM1, auxiliary reclay KA1.By the control of auxiliary reclay (KA2, KA3, KA4, KA5) realization to circulating pump (2#, 3#, 4#, 5#) start and stop, port Y5 connects malfunction indicator lamp HL7 respectively for port Y1, Y2, Y3, Y4.Director port also is connected with current sensor TA output, voltage sensor TV output, temperature sensor (T1, T2) output respectively.
Controller also is connected with interpersonal interface HM1 by communication interface, shows work information parameters such as electric current, voltage, temperature in real time by man-machine interface, can also realize the long-range monitor function of system, carries out Long-distance Control and regulates.
Controller also with the switching value expansion control module of electric secondary circuit shown in Figure 4.This module input mouth is gathered the switching signal of the electrothermal relay (FR1, FR2, FR3, FR4, FR5) that is connected with circulating pump (1#, 2#, 3#, 4#, 5#) respectively, judges whether 1#, 2#, 3#, 4#, 5# circulating pump connecting circuit break down.And, above-mentioned fault message is transported to controller by the connectivity port.
Ten thousand turn-ofves that are connected with the controller power supply with the main circuit loop in the electric secondary circuit close and are provided with 3 kinds of operator schemes, are respectively energy-conservation, stop, bypass mode.Can connect by the inner lead break-make shown in the following table and realize three kinds of operational modes.
As shown in Figure 5, power save circuit when ten thousand turn-ofves close knob selection SW1-1, the main circuit of electric primary circuit connects a control loop of electric primary circuit successively by lead, realization reaches energy-conservation to greatest extent to the adjustment of the whole power output of 5 circulating pumps (1#, 2#, 3#, 4#, 5#) motor.Its concrete annexation is as follows: main circuit connects the motor of auxiliary reclay (KA2, KA3, KA4, KA5), A.C. contactor (KM2, KM3, KM4, KM5), 4 circulating pumps of electrothermal relay (FR2, FR3, FR4, FR5) (2#, 3#, 4#, 5#) correspondence successively by lead; Main circuit also connects the frequency converter of auxiliary reclay KA1, A.C. contactor KM0, control circulating pump 1# electric machine frequency successively by lead, main circuit also connects the motor of A.C. contactor KM2, electrothermal relay FR1, circulating pump 1# successively by lead.In above-mentioned connecting circuit, with in the control loop that circulating pump (1#, 2#, 3#, 4#, 5#) motor is connected also and be connected to the gauge tap (SB1, SB2, SB3, SB4, SB5, SB6, SB7, SB8, SB9, SB10) that is connected with man-machine interface energy conservation starting stop switch, when automatic control energy-saving circuit breaks down, start energy conservation model by man-machine interface.When operation exception or energy saver mode maintenance or debugging appear in main circuit, can switch to bypass circuit SW-3 immediately, the central air-conditioning power saving apparatus is not had an effect, and enters the civil power mode and moves, and does not influence the normal use of equipment.
Adopt native system, changed conventional by manually operated pattern.When entering energy-saving mode, controller is according to the circulating pump water inlet of gathering and the temperature variations of delivery port, and compare with the temperature value that controller is set, under the situation of the normal operation of assurance system, calculate best pump power output by control circuit, automatically adjust the rotating speed of 1# circulating pump motor, and rationally control start-stop time of the pump motor of other power frequency operations, carry out " stop automatically, start automatically ", make the temperature difference of water constant, reach the optimum efficiency of energy-efficient operation at best point.Power saving rate can reach 20%-60%.The highest starting current of soft start motor only is 1.5 times of rated current, and general electric motor starting electric current is 4-7 times.Soft start and soft stop reduce vibration equipment, and noise and friction have prolonged maintenance of equipment cycle and service life, have improved the MTBF value (Mean Time To Repair) of equipment, and when having reduced electric motor starting to the impact of electrical network, improved system reliability.
Also be provided with failure protection function in the system, when the power saving apparatus fault, can automatically switch to protection bypass operation, guarantee the equipment normal operation of not cutting off the power supply.
The above only is preferred embodiment of the present utility model, all any modifications of being done within spirit of the present utility model and principle, is equal to and replaces and improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. a central air-conditioning power saving apparatus comprises main loop circuit, and described main loop circuit is connected with circulating pump, it is characterized in that:
Also comprise electric primary circuit and electric secondary circuit;
Described electric primary circuit comprises current sensor, voltage sensor, temperature sensor, and a control circuit; Described current sensor, voltage sensor input are connected with main loop circuit respectively, and temperature sensor inputs is separately positioned on the water inlet and the delivery port of circulating pump; A described control circuit comprises the air switch that is connected in series successively with main loop circuit, A.C. contactor I, electrothermal relay, circulating pump motor; No. one time control circuit also comprises frequency converter, the A.C. contactor II that is connected in successively between air switch and the circulating pump motor;
Described electric secondary circuit comprises that PLC controller and ten thousand turn-ofves close, and described ten thousand turn-ofves close and are provided with economize on electricity gear and bypass gear and stop gear; Be in the economize on electricity gear when ten thousand turn-ofves close, PLC controller input is connected with current sensor, voltage sensor, temperature sensor inputs respectively; The PLC controller output end connects auxiliary reclay, A.C. contactor II, frequency converter by lead successively; The PLC controller output end also connects auxiliary reclay, A.C. contactor I, electrothermal relay, circulating pump motor by lead successively; Be in the bypass gear when ten thousand turn-ofves close, the PLC controller output end disconnects with the switch that is connected of above-mentioned auxiliary reclay.
2. central air-conditioning power saving apparatus according to claim 1, it is characterized in that: the controller of described electric secondary circuit is according to the comparison value of the temperature difference of the water inlet of the temperature approach of its setting and the circulating pump of being gathered and delivery port, output a control signal to frequency converter, and adjust the rotating speed of circulating pump motor by frequency converter.
3. central air-conditioning power saving apparatus according to claim 1 is characterized in that: described circulating pump has five, and No. one time control circuit comprises five air switches, five A.C. contactors, five electrothermal relays; Main loop circuit respectively and be connected in series successively between each circulating pump motor and form first group of control circuit, second group of control circuit, the 3rd group of control circuit, the 4th group of control circuit, the 5th group of control circuit; Each group control circuit comprises an air switch that is connected successively with main loop circuit, an A.C. contactor, an electrothermal relay; In first group of control circuit, air switch also connects frequency converter, A.C. contactor II successively by lead.
4. central air-conditioning power saving apparatus according to claim 3, it is characterized in that: described controller also connects man-machine interface by communication interface, described man-machine interface comprises that the real-time parameter of electric current, voltage, temperature shows, and energy conservation starting, shut-down operation key.
5. central air-conditioning power saving apparatus according to claim 4, it is characterized in that: in five groups of control circuits of five corresponding connections of circulating pump motor, also be connected in parallel to the gauge tap that is connected with the signaling switch of man-machine interface energy conservation starting, shut-down operation key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202755111U CN201795575U (en) | 2010-07-29 | 2010-07-29 | Energy-saving system of central air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202755111U CN201795575U (en) | 2010-07-29 | 2010-07-29 | Energy-saving system of central air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201795575U true CN201795575U (en) | 2011-04-13 |
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ID=43850480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202755111U Expired - Fee Related CN201795575U (en) | 2010-07-29 | 2010-07-29 | Energy-saving system of central air conditioner |
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| Country | Link |
|---|---|
| CN (1) | CN201795575U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233586A (en) * | 2019-06-24 | 2019-09-13 | 上海威派格智慧水务股份有限公司 | A kind of control circuit and control device that power is electrically separated |
| CN110568823A (en) * | 2018-06-06 | 2019-12-13 | 中国石油天然气集团有限公司 | centralized control device of variable frequency driving system and variable frequency control system |
-
2010
- 2010-07-29 CN CN2010202755111U patent/CN201795575U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568823A (en) * | 2018-06-06 | 2019-12-13 | 中国石油天然气集团有限公司 | centralized control device of variable frequency driving system and variable frequency control system |
| CN110568823B (en) * | 2018-06-06 | 2021-04-30 | 中国石油天然气集团有限公司 | Centralized control device of variable frequency driving system and variable frequency control system |
| CN110233586A (en) * | 2019-06-24 | 2019-09-13 | 上海威派格智慧水务股份有限公司 | A kind of control circuit and control device that power is electrically separated |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20130729 |