CN206593269U - A kind of frequency conversion power saving control device - Google Patents
A kind of frequency conversion power saving control device Download PDFInfo
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- 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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- converter
- plc
- frequency
- temperature difference
- temperature
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- Other Air-Conditioning Systems (AREA)
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
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.
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)
| Publication Number | Publication Date |
|---|---|
| CN206593269U true CN206593269U (en) | 2017-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720077602.6U Expired - Fee Related CN206593269U (en) | 2017-01-22 | 2017-01-22 | A kind of frequency conversion power saving control device |
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| CN (1) | CN206593269U (en) |
Cited By (2)
| 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 |
| CN112665163A (en) * | 2020-12-23 | 2021-04-16 | 珠海格力电器股份有限公司 | Modular unit variable flow control system and method and air conditioner |
-
2017
- 2017-01-22 CN CN201720077602.6U patent/CN206593269U/en not_active Expired - Fee Related
Cited By (3)
| 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 |
| CN112665163A (en) * | 2020-12-23 | 2021-04-16 | 珠海格力电器股份有限公司 | Modular unit variable flow control system and method and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
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 XINQUAN INDUSTRIAL Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171027 Termination date: 20220122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |