CN207963049U - A kind of efficient cooling water frequency-variable controller - Google Patents
A kind of efficient cooling water frequency-variable controller Download PDFInfo
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- CN207963049U CN207963049U CN201721915907.6U CN201721915907U CN207963049U CN 207963049 U CN207963049 U CN 207963049U CN 201721915907 U CN201721915907 U CN 201721915907U CN 207963049 U CN207963049 U CN 207963049U
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- water
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- cooling water
- frequency
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Abstract
The utility model provides a kind of efficient cooling water frequency-variable controller, including control unit, chilled water pump, converter unit, temperature difference adjuster, temperature sensor and flow sensor, converter unit is electrically connected with chilled water pump, control unit is electrically connected with converter unit, flow sensor and converter unit respectively, temperature sensor is electrically connected with control unit respectively with temperature difference adjuster, temperature sensor is set on the water supply line and water return pipeline of chilled water pump, and flow sensor is set on water supply line and water return pipeline.The utility model has the beneficial effects that the automatic adjustment of the flow of cooling water pump can be carried out according to the temperature of water supply line and the cooling water of outlet conduit, the energy is made full use of, saves energy consumption；The automatic adjustment of chilled water pump working frequency is carried out according to the temperature difference using PLC controller so that the stability and reliability of water supply improve, convenient to realize centralized management and monitoring；Simultaneity factor has low power consuming, efficient characteristic.
Description
Technical field
The utility model belongs to energy-saving control technology field, more particularly, to a kind of efficient cooling water frequency-variable controller.
Background technology
As national economy persistently rapidly develops and the continuous improvement of living standards of the people, air-conditioning equipment is wide in every field
The use of general use, especially central air conditioner system makes the energy consumption of building be substantially increased.According to statistics, in civil buildings, center
Air-conditioning system typically constitutes from the 40~50% of total energy consumption, and in air-conditioner water system, water pump accounts for the 20~30% of air conditioning energy consumption again
Left and right, reducing energy consumption potentiality are very big.In central air conditioner system, the capacity of chilled water pump is negative according to building design maximum heat
What lotus was selected, and there are certain design margins.In general, water pump and wind turbine are all the full speed under power frequency state throughout the year
Operation adjusts flow or air quantity by the way of throttling or reflux, generates a large amount of throttling or return loss, and to water pump or
For blower motor, since it is the full speed running under power frequency, the waste significantly of energy is caused.Due to the change in the four seasons
Change, when rain or shine sleet and daytime are with night, ambient temperature is different so that the thermic load of central air-conditioning is remote in most times
It is lower than Design cooling load.That is, the central air-conditioning practical most of the time operates under low load condition, therefore make system full
Under the premise of sufficient technological requirement, the operating status of water pump is reasonably adjusted using advanced converter technique, can be greatly reduced
Energy consumption reduces operating cost, creates better benefit.
Invention content
In view of the above problems, problem to be solved in the utility model is to provide a kind of efficient cooling water frequency-variable controller, especially
It is suitble to cooling water recirculation system to use, and can carry out the automatic of chilled water pump according to the temperature difference of water supply and the water outlet of cooling system
It adjusts, changes the flow of cooling water pump, reach energy-efficient purpose.
In order to solve the above technical problems, the technical solution adopted in the utility model is：A kind of efficient cooling water frequency control
Device, including control unit, chilled water pump, converter unit, temperature difference adjuster, temperature sensor and flow sensor, converter unit
It is electrically connected with chilled water pump, control unit is electrically connected with converter unit, flow sensor and converter unit respectively, temperature sensor
It is electrically connected with control unit respectively with temperature difference adjuster, temperature sensor is set to the water supply line and water return pipeline of chilled water pump
On, flow sensor is set on water supply line and water return pipeline.
Specifically, temperature sensor includes supply water temperature sensor and return water temperature sensor, supply water temperature sensor is set
In on water supply line, return water temperature sensor is set on water return pipeline.
Specifically, flow sensor includes water supply flow sensor and circling water flow rate sensor, water supply flow sensor is set
In on water supply line, circling water flow rate sensor is set on water return pipeline.
Specifically, control unit includes central controller, data processing unit and controller, central controller at data
Unit electrical connection is managed, controller is electrically connected with central controller and data processing unit respectively.
Further, further include operational order input module, operational order input module is electrically connected with the controller.
Further, further include display module, display module is electrically connected with the controller.
The utility model has the advantages and positive effects of：
1. due to the adoption of the above technical scheme so that the adjusting of the flow of cooling water recirculation system more automates, can
The automatic adjustment that the flow of cooling water pump is carried out according to the temperature of water supply line and the cooling water of outlet conduit, makes full use of energy
Energy consumption is saved in source；
2. carrying out the automatic adjustment of chilled water pump working frequency according to the temperature difference using PLC controller, and then adjust cooling water
Flow so that the stability and reliability of water supply improve, convenient to realize centralized management and monitoring；Simultaneity factor has low consumption
Energy, efficient characteristic.
Description of the drawings
Fig. 1 is the structural schematic diagram of an embodiment of the utility model；
Fig. 2 is the operation principle schematic diagram of an embodiment of the utility model.
In figure：
1, data processing unit 2, display module 3, converter unit
4, chilled water pump 5, flow sensor 6, temperature sensor
7, temperature sensor 8, PLC controller 9, central controller
Specific implementation mode
The utility model is further described in the following with reference to the drawings and specific embodiments.
Fig. 1 shows the fundamental diagram of an embodiment of the utility model, and the worked of the present embodiment has been shown in particular
Journey, the present embodiment are related to a kind of efficient cooling water frequency-variable controller, the flow for controlling cooling water recirculation system so that cooling
The supply water temperature and leaving water temperature of water water supply flow and circling water flow rate and cooling water are adapted, and according to cooling water supply temperature and
The temperature difference of return water temperature carries out the adjusting of cooling water flow, and the automatic work frequency of chilled water pump 4 is carried out using converter unit 3
It adjusts so that chilled water pump 4 can carry out the adjusting of cooling water flow according to the variation of the cooling system temperature difference, reach energy-efficient mesh
's.
Above-mentioned efficient cooling water frequency-variable controller includes control unit, temperature sensor 6, flow sensor 5, frequency conversion list
Member 3, temperature difference adjuster 7 and chilled water pump 4, converter unit 3 are electrically connected with chilled water pump 4, control unit respectively with converter unit
3, flow sensor 5 and temperature difference adjuster 7 are electrically connected, and temperature sensor 7 is electrically connected with control unit respectively with temperature difference adjuster 7
It connects, temperature sensor 6 is set on the water supply line and water return pipeline of chilled water pump 4, and flow sensor 5 is set to water supply line and returns
On waterpipe, control unit receives the signal that temperature sensor 6 and flow sensor 5 transmit, and finger is sent out to temperature difference adjuster 7
It enables, controls the temperature of cooling water and return water, control converter unit 3 acts, and then controls chilled water pump 4 and act, and changes and supplies
The flow of waterpipe and water return pipeline, and then the temperature of cooling water recirculation system is controlled, utilize the PID of programmable logic controller (PLC)
3 frequency control chilled water pump 4 of control algolithm combination converter unit improves the stability and reliability that recirculated cooling water supplies water, and reaches
Energy-efficient purpose reduces energy consumption.
Specifically, as illustrated in fig. 1 and 2, above-mentioned chilled water pump is mounted in cooling water cooling system, and cooling tower,
Chilled water pump 4 is connected with cooling water unit by water supply line, and cooling water unit passes through heat exchanger or condenser and cooling water
Tower connects, and realizes that cooling water circulation, cooling water system cool down.Temperature sensor 6 is installed on water supply line, it is warm here
It includes supply water temperature sensor and leaving water temperature sensors to spend sensor 6, and supply water temperature sensor is provided on water supply line,
Leaving water temperature sensors are installed on outlet conduit, the cooling water on water supply line and outlet conduit is measured into trip temperature；
Meanwhile flow sensor 5 being installed on water supply line, flow sensor 5 includes water supply flow sensor and goes out flow here
Quantity sensor is equipped with water supply flow sensor in water supply line, water flow sensor is equipped on outlet conduit, to supplying
Cooling water flow on waterpipe and outlet conduit measures, meanwhile, temperature difference adjuster 7 is installed on water supply line, it is right
The cooling water temperature of water supply line and outlet conduit is adjusted, so that the flow of cooling water and temperature match.
Above-mentioned chilled water pump 4 is electrically connected with converter unit 3, and converter unit 3 is electrically connected with the motor of chilled water pump 4, is changed
Become the working frequency of motor, and then change the working frequency of chilled water pump 4, and then change the flow of cooling water system, and then controls
The temperature of cooling water system processed so that flow is wanted to coordinate with temperature, saves energy consumption.Here chilled water pump 4 is commercial product, according to
Actual demand is selected, and converter unit 3 is frequency converter, is commercial product, is selected according to actual demand.
Above-mentioned control unit includes controller, central controller 9 and data processing unit 1, central controller 9 and data
Processing unit 1 is electrically connected, and controller is electrically connected with central controller 9 and data processing unit 1 respectively, and controller is PLC here
Controller 8 is preset with the program editted in the PLC controller 8, carries out the acquisition of the supply water temperature and return water temperature of cooling water
Storage is handled, and is carried out at the same time the acquisition storage and processing of the data of water supply flow and circling water flow rate, meanwhile, PLC controller 8 is in
Centre controller 9 can carry out the transmission of data, and central controller 9 is according to the incoming ginseng of PLC controller 8 and data processing unit 1
Number, to judge current running situation, and then order PLC controller 8 sends out specific control and is connect with the motor of chilled water pump 4
Frequency converter instruction.General process is as follows：It sets the disengaging water temperature difference △ T=5 DEG C of condenser and cooling flow is adjusted with this
Amount.When detecting △ T<At 5 DEG C, the running frequency of chilled water pump 4 is reduced, to reduce cooling water flow.But chilled water pump 4
Flow is not to reduce always, but there are one the traffic protection extreme values set, when flow is less than traffic protection extreme value, freezing
Water pump 4 will be run in the low-limit frequency of setting, be not changed.When detecting △ T>At 5 DEG C, the fortune of chilled water pump 4 is increased
Line frequency, to increase cooling water flow, to make the cooling water disengaging temperature difference remain at 5 DEG C of operations.But due to condenser
In the radiating condition variation of condensation heat and cooling tower tower body can all cause the variation of cooling water temperature, therefore cooling range
Variation tends not to the load variations of total overall reaction load running, while condensation temperature is too high or too low will all be transported to handpiece Water Chilling Units
It is unfavorable that row causes, and in order to make entire cooling water system keep high-effect when chilled water pump 4 is run, is provided with optimum temperature.It is cold
The target for freezing the control that water pump 4 is run, exactly allows cooling water temperature to be maintained at always during 4 runing adjustment of chilled water pump
Below optimum temperature.Thus when the parameter in parameter database calculates optimum temperature detection by data processing unit 1, in
It entreats controller 9 just by data feedback to PLC controller 8, regulating command is sent to the frequency conversion of chilled water pump 4 by PLC controller 8
Device adjusts the flow of chilled water pump 4.With this, the control of chilled water pump 4 is completed jointly by disengaging water temperature difference and optimum temperature,
To ensure that system is run in the state of most energy saving.
Supply water temperature sensor and return water temperature sensor are electrically connected with PLC controller 8 respectively, and the temperature measured is transmitted
To PLC controller 8, water supply flow sensor is electrically connected with PLC controller 8 respectively with circling water flow rate sensor, the confession that will be measured
Water flow and circling water flow rate pass to PLC controller 8, and PLC controller 8 passes to the temperature measured and data on flows at data
Unit 1 and central processing unit 9 are managed, data analysis comparison is carried out, central controller 9 sends out instruction to PLC controller 8, and control becomes
Frequency unit 3 and temperature difference adjuster 7 act, and carry out the adjusting of the flow of chilled water pump 4.
Meanwhile the temperature and flow of cooling water can be shown on display module 2, be referred to for operating personnel, here
Display module 2 is display screen, while colleges and universities' cooling water frequency-variable controller is additionally provided with operational order input module, for operating personnel
Input voltage controls the rotation of motor, and then controls the frequency of chilled water pump 4.The temperature difference, which is set, according to cooling water carries out frequency conversion control
System, and the control from the progress minimum flows of minimum flow * 120% is allowed according to cold, it is ensured that handpiece Water Chilling Units are integrally energy-efficient.
The course of work of the present embodiment：In cooling water system, number that temperature sensor 6 and flow sensor 5 will measure
According to PLC controller 8 is passed to, data pass to central controller 8 into after crossing the processing of data processing unit 1, and central controller 9 is pressed
Comparison processing is carried out according to preset program, instruction is passed into PLC controller 8, PLC controller 8 controls converter unit 3 and changes work
Working frequency, converter unit 3 control motor, change the working frequency of motor, and then change the working frequency of chilled water pump 4, meanwhile,
PLC controller 8 controls the flow that temperature difference adjuster 7 adjusts chilled water pump, and setting the temperature difference according to cooling water carries out frequency control, right
Chilled water pump 4 carries out minimum flow control, it is ensured that handpiece Water Chilling Units are integrally energy-efficient.
The utility model has the advantages and positive effects of：Due to the adoption of the above technical scheme so that cooling water circulation
The adjusting of the flow of system more automates, and can carry out cooling water according to the temperature of water supply line and the cooling water of outlet conduit
The automatic adjustment of the flow of pump makes full use of the energy, saves energy consumption；Chilled water pump work is carried out according to the temperature difference using PLC controller
The automatic adjustment of working frequency, and then adjust the flow of cooling water so that the stability and reliability of water supply improve, convenient to realize
Centralized management and monitoring；Simultaneity factor has low power consuming, efficient characteristic.
One embodiment of the utility model is described in detail above, but the content is only the utility model
Preferred embodiment should not be considered as limiting the scope of the present invention.It is all to be made according to application scope of the utility model
All the changes and improvements etc., should all still belong within the patent covering scope of the utility model.
Claims (9)
1. a kind of efficient cooling water frequency-variable controller, it is characterised in that：Including control unit, chilled water pump, converter unit, the temperature difference
Adjuster, temperature sensor and flow sensor, the converter unit are electrically connected with the chilled water pump, described control unit point
It is not electrically connected with the converter unit, the flow sensor and the converter unit, the temperature sensor and the temperature difference
Adjuster is electrically connected with described control unit respectively, and the temperature sensor is set to the water supply line and return water of the chilled water pump
On pipeline, the flow sensor is set on the water supply line and the water return pipeline.
2. efficient cooling water frequency-variable controller according to claim 1, it is characterised in that：The temperature sensor includes supplying
Water temperature sensor and return water temperature sensor, the supply water temperature sensor are set on the water supply line, the return water temperature
Sensor is spent to be set on the water return pipeline.
3. efficient cooling water frequency-variable controller according to claim 1 or 2, it is characterised in that：The flow sensor packet
Water supply flow sensor and circling water flow rate sensor are included, the water supply flow sensor is set on the water supply line, described time
Water flow sensor is set on the water return pipeline.
4. efficient cooling water frequency-variable controller according to claim 1 or 2, it is characterised in that：Described control unit includes
Central controller, data processing unit and controller, the central controller are electrically connected with the data processing unit, the control
Device processed is electrically connected with the central controller and the data processing unit respectively.
5. efficient cooling water frequency-variable controller according to claim 3, it is characterised in that：Described control unit includes center
Controller, data processing unit and controller, the central controller are electrically connected with the data processing unit, the controller
It is electrically connected respectively with the central controller and the data processing unit.
6. efficient cooling water frequency-variable controller according to claim 1 or 2, it is characterised in that：Further include that operational order is defeated
Enter module, the operational order input module is electrically connected with the controller.
7. efficient cooling water frequency-variable controller according to claim 3, it is characterised in that：It further include operational order input mould
Block, the operational order input module are electrically connected with the controller.
8. efficient cooling water frequency-variable controller according to claim 1 or 2, it is characterised in that：Further include display module, institute
Display module is stated to be electrically connected with the controller.
9. efficient cooling water frequency-variable controller according to claim 3, it is characterised in that：Further include display module, it is described
Display module is electrically connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721915907.6U CN207963049U (en) | 2017-12-31 | 2017-12-31 | A kind of efficient cooling water frequency-variable controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721915907.6U CN207963049U (en) | 2017-12-31 | 2017-12-31 | A kind of efficient cooling water frequency-variable controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207963049U true CN207963049U (en) | 2018-10-12 |
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ID=63731558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721915907.6U Expired - Fee Related CN207963049U (en) | 2017-12-31 | 2017-12-31 | A kind of efficient cooling water frequency-variable controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207963049U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649220A (en) * | 2020-05-09 | 2020-09-11 | 桂林鸿程矿山设备制造有限责任公司 | Automatic oil temperature control system and method for lubricating station |
| CN116282293A (en) * | 2023-03-23 | 2023-06-23 | 西安热工研究院有限公司 | Operation control system and method for power station boiler chemical cleaning waste liquid distillation equipment |
-
2017
- 2017-12-31 CN CN201721915907.6U patent/CN207963049U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649220A (en) * | 2020-05-09 | 2020-09-11 | 桂林鸿程矿山设备制造有限责任公司 | Automatic oil temperature control system and method for lubricating station |
| CN116282293A (en) * | 2023-03-23 | 2023-06-23 | 西安热工研究院有限公司 | Operation control system and method for power station boiler chemical cleaning waste liquid distillation equipment |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20210928 Granted publication date: 20181012 |
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| PD01 | Discharge of preservation of patent | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181012 Termination date: 20201231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |