CN2483747Y - Frequency conversion controlling device for pump motor in central air-conditioner - Google Patents
Frequency conversion controlling device for pump motor in central air-conditioner Download PDFInfo
- Publication number
- CN2483747Y CN2483747Y CN 01239768 CN01239768U CN2483747Y CN 2483747 Y CN2483747 Y CN 2483747Y CN 01239768 CN01239768 CN 01239768 CN 01239768 U CN01239768 U CN 01239768U CN 2483747 Y CN2483747 Y CN 2483747Y
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- China
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- pump motor
- water pump
- frequency conversion
- programmable logic
- logic controller
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- Expired - Fee Related
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Abstract
The utility model relates to a frequency conversion control device used for pump motor of central air conditioning, comprising a frequency converter for refrigerating water pump motor, a frequency converter for cooling water pump motor and a programmed controller, which is characterized in that temperature sensors are arranged at the inlet and outlet of the refrigerating and the cooling water pump; the sensor signal of every temperature sensor is sampled and then sent to the programmed controller to analyze and process; the operation frequencies of the refrigerating and the cooling water pump motor are regulated by the frequency conversion commands outputted by the programmed controller via the frequency converter for the refrigerating water pump motor and the frequency converter for the cooling water pump motor. The utility model can perform the controlling of energy saving and speed regulating to the refrigerating and the cooling water pump motor based on the actual load of the water circulation system of the central air conditioning.
Description
The utility model relates to a kind of central air conditioner pump motor frequency-converting control device.
The just simple usually frequency converter of installing of existing central air conditioner system, so in fact, can only play a soft start function, owing to there is not control system, so frequency converter can't be adjusted pump rotary speed according to actual load, therefore such product is difficult to realize energy-conservation purpose.
The purpose of this utility model is that a kind of central air conditioner pump motor frequency-converting control device will be provided, and this device can be realized energy-saving speed regulating control to chilled water pump and cooling-water pump motor according to the actual load of central air conditioner water circulation system.
The utility model is to constitute like this, it comprises chilled water pump motor frequency conversion device, cooling-water pump motor frequency conversion device and Programmable Logic Controller, it is characterized in that: be provided with and be laid in the chilled water pump import and export, and the temperature sensor of cooling-water pump import and export, the transducing signal output terminal of each temperature sensor is connected with the input interface of Programmable Logic Controller, and Programmable Logic Controller has control signal output ends that is connected with chilled water pump motor frequency conversion device input end and the control signal output ends that is connected with cooling-water pump motor frequency conversion device input end.
The water temperature that the utility model can be imported and exported freezing and cooling system by temperature sensor and the detection signal of temperature approach are delivered to Programmable Logic Controller, do corresponding direct proportion integral operation by control module according to different situations, draw the frequency that water pump should move, and send control signal corresponding and change into the motor that the correspondent frequency electric current flows to water pump, thereby realize the effect of energy-saving speed regulating control through frequency converter.Therefore, have the raising efficiency of motor, improve its service condition, the remarkable advantage that prolongs its serviceable life.
Below in conjunction with drawings and Examples the utility model is specifically described.
Fig. 1 is the utility model embodiment circuit connection diagram.
With reference to accompanying drawing, the utility model embodiment comprises chilled water pump motor frequency conversion device 2, cooling-water pump motor frequency conversion device 2, be connected with the Programmable Logic Controller 3 of touch-screen 5 and be laid in chilled water pump and import and export, and the temperature sensor 1 that cooling-water pump is imported and exported is characterized in that: also be provided with the pressure transducer 4 that is laid on the chilled water pipe, the transducing signal output terminal of each temperature sensor and pressure transducer is connected with the input interface of Programmable Logic Controller.
The said temperature sensor adopts platinum resistance sensor (PT1000), pressure transducer adopts pressure unit or pressure/pressure difference switch (such as the 4ADS-10 type), and Programmable Logic Controller can adopt PCD-M110, PCDM120, PCDM130, or the Programmable Logic Controller of PCD2 series.Frequency converter adopts the ACS400SERIES or the ACS600SERIES product of ABB AB, and touch-screen one man-machine interface adopts PWS1700-STN or the PWS1711-MONO technical grade interface of HITECH.
The course of work of the utility model embodiment is described below; The water temperature that temperature sensor is imported and exported freezing and cooling system and the detection signal of temperature approach send back to Programmable Logic Controller, control module is done corresponding direct proportion integral operation according to different situations, draw the frequency that water pump should move, corresponding signal conveys is to frequency converter, frequency converter changes into the motor that the correspondent frequency electric current flows to water pump with signal, thereby reaches the effect of energy-saving speed regulating control.After pressure transducer filters pressure signal after testing, give process controller able to programme and handle, when the insufficient pressure of terminal pipeline, system will use the protection link to have enough water yields to pass through with assurance system end, reach the balanced purpose of controlling.When load increases, import and export the water temperature temperature difference and increase, increase the frequency of motor operation, pump will speed up, and discharge is increased; When load reduced, the water temperature temperature difference reduced, and reduced the frequency of motor operation, and pump will slow down, and flow is reduced.
Embodiment of the present utility model can detect the each several part temperature by temperature sensor, accurately reflects system's actual load; By pressure sensor monitoring index circuit terminal pressure, and accept above-mentioned transducing signal by Programmable Logic Controller, calculating and sending goes out the frequency conversion instruction simultaneously, through chilled water pump motor frequency conversion device and cooling-water pump motor frequency conversion device chilled water pump and cooling-water pump motor is realized energy-saving speed regulating control respectively.Therefore, have conserve water pump motor electric energy, improve electric efficiency and serviceable life; Reduce cooling water amount, reduce remarkable advantages such as motor and cooling tower buzz and management be easy to use.Its popularizing application prospect is considerable.
Claims (3)
1. central air conditioner pump motor frequency-converting control device, comprise chilled water pump motor frequency conversion device, cooling-water pump motor frequency conversion device and Programmable Logic Controller, it is characterized in that: be provided with and be laid in the chilled water pump import and export, and the temperature sensor of cooling-water pump import and export, the transducing signal output terminal of each temperature sensor is connected with the input interface of Programmable Logic Controller, and Programmable Logic Controller has control signal output ends that is connected with chilled water pump motor frequency conversion device input end and the control signal output ends that is connected with cooling-water pump motor frequency conversion device input end.
2. central air conditioner pump motor frequency-converting control device according to claim 1, it is characterized in that: also be provided with the pressure transducer that is laid on the chilled water pipe, the transducing signal output terminal of each temperature sensor and pressure transducer is connected with the input interface of Programmable Logic Controller.
3. central air conditioner pump motor frequency-converting control device according to claim 1 and 2, it is characterized in that: temperature sensor adopts platinum resistance sensor, pressure transducer adopts pressure unit or pressure/pressure difference switch, Programmable Logic Controller can adopt PCD-M110, PCDM120, PCDM130, or the Programmable Logic Controller of PCD2 series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239768 CN2483747Y (en) | 2001-04-10 | 2001-04-10 | Frequency conversion controlling device for pump motor in central air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239768 CN2483747Y (en) | 2001-04-10 | 2001-04-10 | Frequency conversion controlling device for pump motor in central air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2483747Y true CN2483747Y (en) | 2002-03-27 |
Family
ID=33652139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01239768 Expired - Fee Related CN2483747Y (en) | 2001-04-10 | 2001-04-10 | Frequency conversion controlling device for pump motor in central air-conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2483747Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994729A (en) * | 2010-12-22 | 2011-03-30 | 西安交通大学苏州研究院 | Oil temperature control system and control method of refrigeration type hydraulic system |
| CN109425085A (en) * | 2017-08-23 | 2019-03-05 | 恩可语股份有限公司 | control device and control method thereof |
| CN110864416A (en) * | 2019-11-14 | 2020-03-06 | 南京亚派软件技术有限公司 | Start-stop optimization control method for central air-conditioning system |
| US10901441B2 (en) | 2018-11-20 | 2021-01-26 | En Ke Yu Co., Ltd. | Controller for providing resistance value controlling power usage in a temperature controller |
-
2001
- 2001-04-10 CN CN 01239768 patent/CN2483747Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994729A (en) * | 2010-12-22 | 2011-03-30 | 西安交通大学苏州研究院 | Oil temperature control system and control method of refrigeration type hydraulic system |
| CN109425085A (en) * | 2017-08-23 | 2019-03-05 | 恩可语股份有限公司 | control device and control method thereof |
| US10901441B2 (en) | 2018-11-20 | 2021-01-26 | En Ke Yu Co., Ltd. | Controller for providing resistance value controlling power usage in a temperature controller |
| CN110864416A (en) * | 2019-11-14 | 2020-03-06 | 南京亚派软件技术有限公司 | Start-stop optimization control method for central air-conditioning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |