CN221610158U - Self-adaptive variable frequency control system of water pump - Google Patents
Self-adaptive variable frequency control system of water pump Download PDFInfo
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- CN221610158U CN221610158U CN202420059565.6U CN202420059565U CN221610158U CN 221610158 U CN221610158 U CN 221610158U CN 202420059565 U CN202420059565 U CN 202420059565U CN 221610158 U CN221610158 U CN 221610158U
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- water pump
- frequency control
- variable frequency
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 104
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- 239000000498 cooling water Substances 0.000 claims description 16
- 230000003044 adaptive effect Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 6
- 238000007710 freezing Methods 0.000 claims description 6
- 230000008014 freezing Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 230000009466 transformation Effects 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229930186147 Cephalosporin Natural products 0.000 description 3
- 229930182555 Penicillin Natural products 0.000 description 3
- JGSARLDLIJGVTE-MBNYWOFBSA-N Penicillin G Chemical compound N([C@H]1[C@H]2SC([C@@H](N2C1=O)C(O)=O)(C)C)C(=O)CC1=CC=CC=C1 JGSARLDLIJGVTE-MBNYWOFBSA-N 0.000 description 3
- 229940124587 cephalosporin Drugs 0.000 description 3
- 150000001780 cephalosporins Chemical class 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 229940049954 penicillin Drugs 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000002354 daily effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000013307 optical fiber Substances 0.000 description 1
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model provides a self-adaptive variable frequency control system of a water pump, which relates to the technical field of electric control and comprises a controller, wherein the controller is electrically connected with a plurality of temperature sensors, the temperature sensors are used for detecting the load water temperature change of the water pump and the cold water inlet temperature of a refrigerator, the controller is connected with a water pump II through an intermediate relay KA2, and the controller is connected with a water pump I through an intermediate relay KA 1; the water pump II is connected with a variable frequency control unit. The device can effectively control the frequency of the motor to achieve the aim of saving energy under the condition of meeting the technical requirements of the process, and the power consumed by the power equipment is changed along with the change of the load through energy saving transformation, so that the energy can be effectively saved.
Description
Technical Field
The utility model relates to the technical field of electrical control, in particular to a self-adaptive variable frequency control system of a water pump.
Background
The cooling water circulation system is a water supply system which uses water as a cooling medium and mainly comprises cooling equipment, a water pump and a pipeline through cooling by heat exchange of cooling water. After the cold water flows through the production equipment which needs to be cooled, the temperature rises, if the cold water is discharged immediately, the cold water is only used once (called a direct-current cooling water system), so that the temperature of the cold water which is heated flows through the cooling equipment is reduced, the cold water can be pumped back to the production equipment for reuse, the consumption of the cold water is greatly reduced, and the consumption of the cold water can be saved by more than 95%. The cooling water accounts for about 70% of the industrial water consumption, so the cooling water circulation system plays a role in saving a large amount of industrial water. The circulating water pump in the existing cold water circulating system is higher in power configuration and power consumption due to process configuration requirements. The association of power consumption with the cold water temperature in the cold water system cannot be achieved, so that the system energy consumption is high, and the energy utilization rate is low.
Disclosure of utility model
In order to solve the problems in the prior art, the self-adaptive variable frequency control system of the water pump is provided. The device can effectively control the frequency of the motor to achieve the aim of saving energy under the condition of meeting the technical requirements of the process, and the power consumed by the power equipment is changed along with the change of the load through energy saving transformation, so that the energy can be effectively saved.
The technical scheme adopted for solving the technical problems is as follows:
The utility model provides a water pump self-adaptive variable frequency control system, which comprises a controller, wherein the controller is electrically connected with a plurality of temperature sensors, the temperature sensors are used for detecting water pump load water temperature change and cold water inlet temperature of a refrigerator, the controller is connected with a water pump II through an intermediate relay KA2, and the controller is connected with a water pump I through an intermediate relay KA 1; the water pump II is connected with a variable frequency control unit.
Preferably, the controller is electrically connected with the variable frequency control unit through an RS485 interface to realize communication.
Preferably, the temperature sensors are provided with four sensors, and the four sensors are respectively used for detecting the cooling water outlet temperature, the cooling water inlet temperature, the freezing water outlet temperature and the freezing water inlet temperature.
Preferably, the variable frequency control unit comprises a frequency converter, the frequency converter is electrically connected with a motor for driving the water pump II to work, and the frequency converter can change the frequency of the motor.
Preferably, the frequency converter is connected with an ammeter.
Preferably, the frequency converter is electrically connected with an air circuit breaker.
Preferably, the frequency converter is connected with a fan, and the fan is electrically connected with an air circuit breaker.
Preferably, the frequency converter is connected with a timer for accumulating the total time of energization.
Preferably, the controller communicates with a wired network of the control center through an RJ45 connector.
Preferably, the controller controls the water pump I to operate through the normally open intermediate relay KA3, and the water pump I and the water pump II are connected in parallel into the circuit.
Compared with the prior art, the utility model has the beneficial effects that:
The utility model adjusts the output power of the motor in a target control mode, timely and accurately holds related information through detecting the target, compares the actual condition of system operation with the set target, and if the actual condition deviates from the set target, the self-adaptive variable frequency control system can timely change the output frequency of the motor to enable the actual condition to be consistent with the set target, so that the motor frequency can be effectively controlled to achieve the aim of saving energy under the condition of meeting the technical requirements of the process, and the power consumed by the power equipment is changed along with the change of the load through energy saving transformation, thereby effectively saving energy.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of the overall control of the present utility model;
FIG. 2 is a second overall control schematic of the present utility model;
fig. 3 is a schematic diagram of the distribution of the apparatus in the present utility model.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
As shown in fig. 1-3, this embodiment provides a water pump adaptive variable frequency control system, which includes a controller, the controller is electrically connected with a plurality of temperature sensors, the temperature sensors are used for detecting the load water temperature change of the water pump and the cold water inlet temperature of the refrigerator, and after the temperature sensors detect the temperature change, the frequency of the motor can be adaptively adjusted according to the temperature change, so as to change the running power of the water pump.
The temperature sensors are respectively used for detecting the cooling water outlet temperature, the cooling water inlet temperature, the freezing water outlet temperature and the freezing water inlet temperature.
For the cooling circulating water system, the change of the water temperature of the load is selected as a target, so that the flow of the circulating water pump is matched with the load of the system, and the situation that the water temperature is large and the water temperature is small is achieved, thereby saving energy.
For the refrigerator, the temperature of cold water inlet is selected as a target, when the temperature is high, the frequency is increased, and when the temperature is low, the frequency is reduced, so that unnecessary consumption of electric energy is avoided, and energy is saved.
The controller is connected with a water pump II through an intermediate relay KA2, and the controller is connected with a water pump I through an intermediate relay KA 1; the water pump II is connected with a variable frequency control unit.
When the water pump is used in daily life, the water pump II works, so that the operation of the cooling water circulation system is realized, the water pump I is used as a standby water pump, when the water pump is used in daily life, the water pump I does not work, and only when the water pump II has a problem, the water pump I works, and the water pump I and the water pump II are connected in parallel into a circuit.
The controller controls the operation of the water pump I through the normally open intermediate relay KA3, the controller can control the starting of the water pump I through the intermediate relay KA1, and then the operation of the water pump I can be controlled by transmitting corresponding electric signals to the intermediate relay KA 3.
The controller is electrically connected with the variable frequency control unit through an RS485 interface to realize communication, and the controller is connected with a wired network of the control center through an RJ45 connector.
The frequency conversion control unit comprises a frequency converter, the frequency converter is electrically connected with a motor for driving the water pump II to work, and the frequency of the motor can be changed by the frequency converter.
The frequency converter is connected with the ammeter, and the frequency converter is connected with the time accumulator that is used for accumulating the total time of circular telegram, through the cooperation of ammeter and time accumulator, can detect the electric energy consumption in the unit time to can do benefit to the better regulation and control work of system.
The frequency converter is electrically connected with an air circuit breaker, which plays a role of a protection circuit. The frequency converter is connected with a fan, the fan is electrically connected with an air circuit breaker, and when the fan is in short circuit, the air circuit breaker can trip, so that the fan is in open circuit, and the normal operation of the whole circuit cannot be influenced.
An air circuit breaker is a switch that automatically opens whenever the current in the circuit exceeds a rated current. The air circuit breaker integrates control and various protection functions, can complete contact and breaking of a circuit, can protect short circuits, serious overload, undervoltage and the like of the circuit or electric equipment, and can be used for starting a motor infrequently.
The application reduces energy consumption, and mainly realizes energy saving transformation from two aspects of equipment energy saving and system energy saving, thereby saving energy to the greatest extent.
The energy saving of the equipment is energy waste caused by the fact that the equipment is not energy-saving or the equipment is more than the actual requirement, and the original high-power equipment can be subjected to power adjustment under the condition of ensuring the technological requirement through accurate calculation, so that the energy saving of the equipment is realized.
The energy saving of the system is energy waste caused by the process condition and other limitations and the change of factors such as system load, environment and the like, and the power consumed by the power equipment is changed along with the change of the load through energy saving transformation, so that the energy can be effectively saved.
Energy-saving principle: the rotating speed N of the three-phase asynchronous motor is as follows: n=60 f (1-s)/p, wherein N, s, p, f represents the rotation speed, motor slip, motor pole pair number, and motor frequency, respectively. It can be seen that the motor speed is proportional to frequency, and likewise the water pump flow is proportional to the speed of the three-phase ac motor.
The output power of the water pump is proportional to the cube of the flow, i.e. to the cube of the frequency. Therefore, under the condition of meeting the technical requirements of the process, the energy-saving purpose can be achieved by effectively controlling the frequency of the motor, and the feasibility of applying the self-adaptive variable frequency control system to energy-saving transformation of the cold water circulation system is determined.
An adaptive variable frequency control system: the self-adaptive variable frequency control system adjusts the output power of the motor in a target control mode, the actual condition of the system operation is compared with the set target by timely and accurately holding related information through target detection, and if the actual condition deviates from the set target, the self-adaptive variable frequency control system can timely change the output frequency of the motor to enable the actual condition to be consistent with the set target, so that the self-adaptive variable frequency control system is a continuous circulation process.
For the cooling circulating water system, the change of the water temperature of the load is selected as a target, so that the flow of the circulating water pump is matched with the load of the system, and the situation that the water temperature is large and the water temperature is small is achieved, thereby saving energy.
For the cold water circulating water pump, the inlet temperature of the condenser is selected as a target, the temperature is high, the frequency is increased, and when the temperature is low, the frequency is reduced, and the unnecessary consumption of electric energy is avoided, so that the energy is saved.
FIG. 3 is a schematic diagram of the distribution of equipment in the present utility model, a generic class shop: a shield water-cooled refrigerating unit, a chilled water pump, 2 pieces of 22kw, a standby cooling water pump, 2 pieces of 30kw and a standby cooling water pump.
Cephalosporin workshops: one ton-han brash refrigerator with power of 206.5kw, 5-9 months on, cooling water pump, 2 55kw, one standby, chilled water pump, 2 37kw, one standby.
Penicillin plant: one air conditioning system refrigerating machine, RSW-180-2, chilled water pump, 2 machines 18.5kw, one machine for one, cooling water pump, 2 machines 22kw, one machine for one.
All power equipment such as the existing refrigerating machine hosts and water pumps are connected through optical fiber communication in a network mode, and the operation of the refrigerating machine hosts and water pumps in a common workshop, a penicillin workshop and a cephalosporin workshop can be monitored and operated at any time by a computer in a connecting mode, and a connection diagram is shown in figure 3.
Energy-saving effect: the energy saving rate of the water pump reaches 35 percent through electric energy metering and measuring and calculating.
The energy-saving effect of each workshop is as follows: the air conditioner and the water pump are operated for 10 hours every day from 5 months to 10 months, four months and 130 days. The electricity charge is calculated according to 0.87 yuan/degree.
The water pump in the common workshop can save electricity charge for one year:
(22+30) 35% 10×130×0.87 element= 2.0584 ten thousand elements.
The water pump for the cephalosporin workshop can save electricity charge for one year:
(55+37) 35% 10×130×0.87= 3.6418 ten thousand yuan.
The water pump in the penicillin workshop can save electricity charge for one year:
(22+30) 35% 10×130×0.87 element= 2.0584 ten thousand elements.
The annual energy-saving electricity charge of the water pump in the three workshops is as follows: about 8 ten thousand yuan.
The application adjusts the output power of the motor in a target control mode, timely and accurately holds related information through target detection, compares the actual running condition of the system with the set target, and if the actual running condition deviates from the set target, the self-adaptive variable frequency control system can timely change the output frequency of the motor to enable the actual running condition to be consistent with the set target.
The application can effectively control the frequency of the motor under the condition of meeting the technical requirements of the process, can achieve the aim of saving energy, and changes the power consumed by the power equipment along with the change of the load through energy saving transformation, thereby effectively saving energy.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The self-adaptive variable-frequency control system for the water pump is characterized by comprising a controller, wherein the controller is electrically connected with a plurality of temperature sensors, the temperature sensors are used for detecting water pump load water temperature change and cold water inlet temperature of a refrigerator, the controller is connected with a water pump II through an intermediate relay KA2, and the controller is connected with a water pump I through an intermediate relay KA 1; the water pump II is connected with a variable frequency control unit.
2. The adaptive variable frequency control system of claim 1, wherein the controller is electrically connected to the variable frequency control unit via an RS485 interface to achieve communication.
3. The water pump adaptive variable frequency control system according to claim 1, wherein the temperature sensors are provided with four sensors for detecting a cooling water outlet temperature, a cooling water inlet temperature, a freezing water outlet temperature and a freezing water inlet temperature, respectively.
4. The self-adaptive variable frequency control system of the water pump according to claim 1, wherein the variable frequency control unit comprises a frequency converter, the frequency converter is electrically connected with a motor for driving the water pump II to work, and the frequency converter can change the frequency of the motor.
5. The adaptive variable frequency control system of claim 4, wherein the frequency converter is connected to an electricity meter.
6. The adaptive variable frequency control system of claim 4, wherein the frequency converter is electrically connected to an air circuit breaker.
7. The adaptive variable frequency control system of claim 4, wherein the frequency converter is connected with a fan, and the fan is electrically connected with an air circuit breaker.
8. The adaptive variable frequency control system of claim 4, wherein the frequency converter is connected with a timer for accumulating total power-on time.
9. The adaptive variable frequency control system of claim 1, wherein the controller communicates with the control center via an RJ45 connector.
10. The adaptive variable frequency control system of claim 1, wherein the controller controls the operation of the water pump I via a normally open intermediate relay KA3, and the water pump I and the water pump II are connected in parallel into the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420059565.6U CN221610158U (en) | 2024-01-10 | 2024-01-10 | Self-adaptive variable frequency control system of water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420059565.6U CN221610158U (en) | 2024-01-10 | 2024-01-10 | Self-adaptive variable frequency control system of water pump |
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| Publication Number | Publication Date |
|---|---|
| CN221610158U true CN221610158U (en) | 2024-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420059565.6U Active CN221610158U (en) | 2024-01-10 | 2024-01-10 | Self-adaptive variable frequency control system of water pump |
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| Country | Link |
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| CN (1) | CN221610158U (en) |
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- 2024-01-10 CN CN202420059565.6U patent/CN221610158U/en active Active
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