CN206593269U - A kind of frequency conversion power saving control device - Google Patents

A kind of frequency conversion power saving control device Download PDF

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Publication number
CN206593269U
CN206593269U CN201720077602.6U CN201720077602U CN206593269U CN 206593269 U CN206593269 U CN 206593269U CN 201720077602 U CN201720077602 U CN 201720077602U CN 206593269 U CN206593269 U CN 206593269U
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China
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converter
temperature
frequency
plc
temperature difference
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CN201720077602.6U
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Chinese (zh)
Inventor
李海威
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Henan Chihe Technology Co., Ltd
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Shangqiu Xin Quan Industrial Co Ltd
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Abstract

The utility model is related to a kind of frequency conversion power saving control device, it includes temperature sensor, temperature sensor is connected to temperature difference adjuster, temperature difference adjuster is connected to A/D converter, A/D converter is connected to PLC, PLC is connected to D/A converter, D/A converter is connected to frequency converter, frequency converter is connected to motor, motor connection freezing or cooling water pump unit, chilled water pump unit is connected to evaporator by return pipe, evaporator is sent to temperature difference adjuster by the temperature feedback signal of outlet pipe, chilled water pump unit is connected to condenser by return pipe, condenser is sent to temperature difference adjuster by the temperature feedback signal of outlet pipe, the utility model has reasonable in design, it is reliable, it is simple in construction, frequency control, thermostatic control, economize on electricity clear advantage.

Description

A kind of frequency conversion power saving control device
Technical field
The utility model belongs to field of intelligent control technology, and in particular to a kind of control device, more particularly to a kind of frequency conversion Electricity-saving control device.
Background technology
According to investigations, the energy consumption of conventional central air-conditioning almost account for building 50% or so of total power consumption, cause substantial amounts of The waste of electric energy, for conventional central air conditioning energy consumption it is big the problem of, with reference to converter technique propose the central air-conditioning energy based on PLC Control device, devises a kind of central air-conditioning control device based on S7-200PLC and frequency converter, using S7-200PLC as control The cooling water of device, chilled water vari- able flow control form, introduce frequency control, pump rotary speed are automatically adjusted by frequency converter, control Rate of heat exchange, effectively realizes the thermostatic control of air-conditioning system, greatly reduces the electric energy loss of air-conditioning system, has reached energy-conservation Purpose.
Utility model content
The purpose of this utility model is, in order to overcome the deficiencies in the prior art, and to provide a kind of reasonable in design, reliable, It is simple in construction, frequency control, thermostatic control, the obvious control device of economize on electricity.
Technical solutions of the utility model are:A kind of frequency conversion power saving control device, it includes temperature sensor, described temperature Sensor is connected to temperature difference adjuster, and described temperature difference adjuster is connected to A/D converter, and described A/D converter is connected to PLC, described PLC is connected to D/A converter, and described D/A converter is connected to frequency converter, described change Frequency device is connected to motor, and described motor connection freezing or cooling water pump unit, and described chilled water pump unit passes through backwater Pipe is connected to evaporator, and described evaporator is sent to temperature difference adjuster by the temperature feedback signal of outlet pipe, and described is cold Freeze water pump assembly and condenser is connected to by return pipe, described condenser is sent to temperature by the temperature feedback signal of outlet pipe Dropout regulator, described temperature sensor, temperature difference adjuster, A/D converter, PLC, D/A converter, frequency converter, electricity Machine, chilled water pump unit are all connected on the outlet pipe and return pipe of evaporator, described temperature sensor, temperature difference adjuster, A/D converter, PLC, D/A converter, frequency converter, motor, cooling water pump unit are all connected to the outlet pipe of condenser On return pipe.
Described temperature sensor uses PT100 temperature sensors.
Described frequency converter uses MM430 type frequency converters.
Described PLC uses siemens PLC CPU226 type PLCs.
The beneficial effects of the utility model:Control device structure of the present utility model includes temperature sensor, the temperature difference and adjusted Device, A/D converter, PLC, D/A converter, frequency converter, motor, freezing or cooling water pump unit, chilled water or cooling The control method of water uses constant temperature degree difference control method, and by chilled water or cooling water temperature difference control at 4.5 ~ 5 °, PLC passes through The leaving water temperature and return water temperature of chilled water or cooling water are read in internal memory by temperature sensor and thermal module, according to backwater and are gone out The temperature approach of water controls the rotating speed of frequency converter, so as to adjust the flow of chilled water or cooling water, controls the speed of heat exchange, uses Temperature sensor surveys supply and return water temperature, and result is sent into PLC by A/D converter is calculated, and frequency conversion is controlled according to result of calculation Device, so as to control pump rotary speed to carry out regulating water flow, if supply backwater temperature difference is big, load is larger, should improve water pump frequency, and increase is followed Ring water-carrying capacity, accelerates the speed of heat exchange, otherwise the temperature difference is small, illustrates that load is smaller, should reduce water pump frequency, reduces circulating water flow Amount, slows down the speed of heat exchange, reaches the purpose of energy-conservation;A siemens PLC CPU226 types PLC is chosen as controller, It has 24 digital quantity inputs, and 16 digital outputs can meet the control requirement of the switching value of system, and it provides 8 and returned The PID functions on road, to the control task for completing to need to automatically adjust according to PID control rule;From MM430 type frequency conversions Device 2, one is used for control device chilled water circulating pump, and another is used to control air conditioning cooling water circulating pump, MM430 frequency converters The features such as grading control with motor, Energy Saving Control mode, manual/auto control;Using PT temperature sensors, collection sensing Pick-up is in one, and compact conformation is easy for installation, and precision is high, low in energy consumption.
Brief description of the drawings
Fig. 1 is a kind of structural representation of frequency conversion power saving control device of the utility model.
Fig. 2 is a kind of PLC control structure schematic diagrames of frequency conversion power saving control device of the utility model.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Fig. 1~Fig. 2, a kind of frequency conversion power saving control device, it includes temperature sensor, described temperature sensor Temperature difference adjuster is connected to, described temperature difference adjuster is connected to A/D converter, and described A/D converter is connected to PLC controls Device, described PLC is connected to D/A converter, and described D/A converter is connected to frequency converter, and described frequency converter connects Then motor, described motor connection freezing or cooling water pump unit, and described chilled water pump unit is connected by return pipe To evaporator, described evaporator is sent to temperature difference adjuster, described chilled water pump by the temperature feedback signal of outlet pipe Unit is connected to condenser by return pipe, and described condenser is sent to the temperature difference by the temperature feedback signal of outlet pipe and adjusted Device, described temperature sensor, temperature difference adjuster, A/D converter, PLC, D/A converter, frequency converter, motor, freezing Water pump assembly is all connected on the outlet pipe and return pipe of evaporator, described temperature sensor, temperature difference adjuster, A/D conversions Device, PLC, D/A converter, frequency converter, motor, cooling water pump unit are all connected to the outlet pipe and return pipe of condenser On.
Control device structure of the present utility model includes temperature sensor, temperature difference adjuster, A/D converter, PLC controls The control method of device, D/A converter, frequency converter, motor, freezing or cooling water pump unit, chilled water or cooling water is using fixed Temperature difference control method, by chilled water or cooling water temperature difference control at 4.5 ~ 5 °, PLC passes through temperature sensor and thermal module The leaving water temperature and return water temperature of chilled water or cooling water are read in into internal memory, frequency conversion is controlled according to backwater and the temperature approach of water outlet The rotating speed of device, so as to adjust the flow of chilled water or cooling water, controls the speed of heat exchange, is surveyed with temperature sensor and supply backwater temperature Degree, sends into PLC by A/D converter by result and calculates, frequency converter is controlled according to result of calculation, so as to control pump rotary speed Regulating water flow, if supply backwater temperature difference is big, load is larger, should improve water pump frequency, increases circulating water flow, accelerates heat exchange Speed, on the contrary the temperature difference is small, illustrates that load is smaller, should reduce water pump frequency, reduces circulating water flow, slows down the speed of heat exchange, Reach the purpose of energy-conservation.
Embodiment 2
As shown in Fig. 1~Fig. 2, a kind of frequency conversion power saving control device, it includes temperature sensor, described temperature sensor Temperature difference adjuster is connected to, described temperature difference adjuster is connected to A/D converter, and described A/D converter is connected to PLC controls Device, described PLC is connected to D/A converter, and described D/A converter is connected to frequency converter, and described frequency converter connects Then motor, described motor connection freezing or cooling water pump unit, and described chilled water pump unit is connected by return pipe To evaporator, described evaporator is sent to temperature difference adjuster, described chilled water pump by the temperature feedback signal of outlet pipe Unit is connected to condenser by return pipe, and described condenser is sent to the temperature difference by the temperature feedback signal of outlet pipe and adjusted Device, described temperature sensor, temperature difference adjuster, A/D converter, PLC, D/A converter, frequency converter, motor, freezing Water pump assembly is all connected on the outlet pipe and return pipe of evaporator, described temperature sensor, temperature difference adjuster, A/D conversions Device, PLC, D/A converter, frequency converter, motor, cooling water pump unit are all connected to the outlet pipe and return pipe of condenser On, described temperature sensor uses PT100 temperature sensors, and described frequency converter uses MM430 type frequency converters, described PLC uses siemens PLC CPU226 type PLCs.
Control device structure of the present utility model includes temperature sensor, temperature difference adjuster, A/D converter, PLC controls The control method of device, D/A converter, frequency converter, motor, freezing or cooling water pump unit, chilled water or cooling water is using fixed Temperature difference control method, by chilled water or cooling water temperature difference control at 4.5 ~ 5 °, PLC passes through temperature sensor and thermal module The leaving water temperature and return water temperature of chilled water or cooling water are read in into internal memory, frequency conversion is controlled according to backwater and the temperature approach of water outlet The rotating speed of device, so as to adjust the flow of chilled water or cooling water, controls the speed of heat exchange, is surveyed with temperature sensor and supply backwater temperature Degree, sends into PLC by A/D converter by result and calculates, frequency converter is controlled according to result of calculation, so as to control pump rotary speed Regulating water flow, if supply backwater temperature difference is big, load is larger, should improve water pump frequency, increases circulating water flow, accelerates heat exchange Speed, on the contrary the temperature difference is small, illustrates that load is smaller, should reduce water pump frequency, reduces circulating water flow, slows down the speed of heat exchange, Reach the purpose of energy-conservation;A siemens PLC CPU226 types PLC is chosen as controller, it there are 24 digital quantity inputs, 16 digital outputs, can meet the control requirement of the switching value of system, and it provides the PID functions in 8 loops, to complete Need the control task automatically adjusted according to PID control rule;From 2, MM430 types frequency converter, one sets for control Standby chilled water circulating pump, another is used to control air conditioning cooling water circulating pump, and MM430 frequency converters have the classification control of motor The features such as system, Energy Saving Control mode, manual/auto control;Using PT temperature sensors, integrate sensing pick-up, structure is tight Gather, easy for installation, precision is high, low in energy consumption.

Claims (4)

1. a kind of frequency conversion power saving control device, it includes temperature sensor, it is characterised in that:Described temperature sensor is connected to Temperature difference adjuster, described temperature difference adjuster is connected to A/D converter, and described A/D converter is connected to PLC, institute The PLC stated is connected to D/A converter, and described D/A converter is connected to frequency converter, and described frequency converter is connected to electricity Machine, described motor connection freezing or cooling water pump unit, and described chilled water pump unit is connected to evaporation by return pipe Device, described evaporator is sent to temperature difference adjuster by the temperature feedback signal of outlet pipe, and described chilled water pump unit leads to Cross return pipe and be connected to condenser, described condenser is sent to temperature difference adjuster, institute by the temperature feedback signal of outlet pipe Temperature sensor, temperature difference adjuster, A/D converter, PLC, D/A converter, frequency converter, motor, the chilled water pump stated Unit is all connected on the outlet pipe and return pipe of evaporator, described temperature sensor, temperature difference adjuster, A/D converter, PLC, D/A converter, frequency converter, motor, cooling water pump unit are all connected on the outlet pipe and return pipe of condenser.
2. a kind of frequency conversion power saving control device according to claim 1, it is characterised in that:Described temperature sensor is used PT100 temperature sensors.
3. a kind of frequency conversion power saving control device according to claim 1, it is characterised in that:Described frequency converter is used MM430 type frequency converters.
4. a kind of frequency conversion power saving control device according to claim 1, it is characterised in that:Described PLC is used Siemens PLC CPU226 type PLCs.
CN201720077602.6U 2017-01-22 2017-01-22 A kind of frequency conversion power saving control device Active CN206593269U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720077602.6U CN206593269U (en) 2017-01-22 2017-01-22 A kind of frequency conversion power saving control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720077602.6U CN206593269U (en) 2017-01-22 2017-01-22 A kind of frequency conversion power saving control device

Publications (1)

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CN206593269U true CN206593269U (en) 2017-10-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737797A (en) * 2018-12-11 2019-05-10 彩虹(合肥)液晶玻璃有限公司 Heat Exchanger Control System and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737797A (en) * 2018-12-11 2019-05-10 彩虹(合肥)液晶玻璃有限公司 Heat Exchanger Control System and method
CN109737797B (en) * 2018-12-11 2020-06-19 彩虹(合肥)液晶玻璃有限公司 Heat exchanger control system and method

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Effective date of registration: 20191128

Address after: 476900 66 meters west of the intersection of Zhenxing road and Huangshan Road, suixian County, Shangqiu City, Henan Province

Patentee after: Henan Chihe Technology Co., Ltd

Address before: 476900, Henan, Shangqiu province Suixian Zhenxing road and the Yellow River Road intersection south side

Patentee before: Shangqiu Xin Quan Industrial Co., Ltd.

TR01 Transfer of patent right