CN203501350U - PID (Proportional, Integral and Derivative) controller-based variable flow rate air conditioner water system - Google Patents
PID (Proportional, Integral and Derivative) controller-based variable flow rate air conditioner water system Download PDFInfo
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- CN203501350U CN203501350U CN201320536354.9U CN201320536354U CN203501350U CN 203501350 U CN203501350 U CN 203501350U CN 201320536354 U CN201320536354 U CN 201320536354U CN 203501350 U CN203501350 U CN 203501350U
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Abstract
The utility model relates to the field of an air conditioner water system, in particular to a PID (Proportional, Integral and Derivative) controller-based variable flow rate air conditioner water system. The structure of the system comprises a water pump frequency converter, a secondary pump, air conditioner tail end equipment, a pressure difference transmitter and a deviation value controller, wherein a PID controller is arranged in the water pump frequency converter; the output end of the air conditioner tail end equipment is connected with the input end of the pressure difference transmitter; the output end of the pressure difference transmitter is connected with the input end of the deviation value controller; the output end of the deviation value controller is connected with the input end of the PID controller; the output end of the PID controller is connected with the input end of the secondary pump; the output end of the secondary pump is connected with the input end of the air conditioner tail end equipment. According to the PID controller-based variable flow rate air conditioner water system, the secondary pump and the PID controller are combined to control flow rate, so that the PID controller-based variable flow rate air conditioner water system is good in stability, and the energy-saving effect is good.
Description
Technical field
The utility model relates to air-conditioner water system technical field, particularly relates to a kind of variable flow water based on PID controller.
Background technology
In modern society, construction scope is increasing, and the scale of air-conditioning system and complexity are also improved thereupon, and therefore, the proportion of air conditioning energy consumption in building energy consumption is increasing.In the Energy in use of building, according to the difference of building type, the energy consumption of air-conditioning system accounts for 40%～60% of building total energy consumption.In the energy consumption of air-conditioning system, the energy consumption of water system accounts for 60%～80% of whole air conditioning energy consumption, and therefore, the appropriate design of air-conditioner water system and control, be the key of air conditioner system energy saving.
Appearance along with variable-flow air conditioning system, the VFC of the secondary pump in air-conditioner water system is that the Energy Conservation of variable-flow secondary pump system has supplied a good solution route, but, air-conditioner water system of the prior art is general only adopts the mode of circulating pump and secondary cycle pump to control flow simultaneously, or only adopt PID proportional integral pattern to control, the control mode of above-mentioned two kinds of air-conditioner water systems is single, and stability is poor, thereby makes energy-saving effect bad.
Summary of the invention
The purpose of this utility model is to provide a kind of variable flow water based on PID controller for weak point of the prior art, should adopt secondary pump and PID controller combined control stream amount by the variable flow water based on PID controller, make the good stability of this variable flow water based on PID controller, thereby make good energy-conserving effect.
For achieving the above object, the utility model is achieved through the following technical solutions.
A kind of variable flow water based on PID controller is provided, comprises pump variable frequency device, secondary pump, air conditioner end equipment, pressure difference transmitter and deviate controller; In described pump variable frequency device, be provided with PID controller; The output of described air conditioner end equipment is connected with the input of described pressure difference transmitter, the output of described pressure difference transmitter is connected with the input of described deviate controller, the output of described deviate controller is connected with the input of described PID controller, the output of described PID controller is connected with the input of described secondary pump, and described secondary delivery side of pump is connected with the input of described air conditioner end equipment.
Described air conditioner end equipment comprises air-treatment unit, air conditioner ventilation accessory and water tank.
Described air conditioner ventilation accessory comprises ventilator, ventilation shaft and blower fan.
The described variable flow water based on PID controller also comprises bypass pipe and a cyclic system, and a described cyclic system is connected with described secondary pump by described bypass pipe.
A described cyclic system comprises handpiece Water Chilling Units, a pump and supplies water return pipeline; The output of described handpiece Water Chilling Units is connected with the input of a described pump, and a described delivery side of pump is connected with the input of described handpiece Water Chilling Units for water return pipeline by described.
The quantity of described handpiece Water Chilling Units is set to two, two described handpiece Water Chilling Units connections parallel with one another.
The beneficial effects of the utility model: a kind of variable flow water based on PID controller of the present utility model, comprises pump variable frequency device, secondary pump, air conditioner end equipment, pressure difference transmitter and deviate controller; In pump variable frequency device, be provided with PID controller; The output of air conditioner end equipment is connected with the input of pressure difference transmitter, the output of pressure difference transmitter is connected with the input of deviate controller, the output of deviate controller is connected with the input of PID controller, the output of PID controller is connected with the input of secondary pump, and secondary delivery side of pump is connected with the input of air conditioner end equipment.Because this variable flow water based on PID controller adopts secondary pump and PID controller combined control stream amount, make the good stability of this variable flow water based on PID controller, thereby make good energy-conserving effect.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the embodiment 1 of a kind of variable flow water based on PID controller of the present utility model.
Fig. 2 is the structured flowchart of the embodiment 2 of a kind of variable flow water based on PID controller of the present utility model.
In Fig. 1 and Fig. 2, include:
1---pump variable frequency device, 11---PID controller,
2---secondary pump,
3---air conditioner end equipment,
4---pressure difference transmitter,
5---deviate controller,
6---bypass pipe,
7------handpiece Water Chilling Units, 72---pump, 73---is for water return pipeline for cyclic system, 71.
The specific embodiment
The utility model is described in further detail with the following Examples.
See Fig. 1.A kind of variable flow water based on PID controller of the present embodiment, comprises pump variable frequency device 1, secondary pump 2, air conditioner end equipment 3, pressure difference transmitter 4 and deviate controller 5; In pump variable frequency device 1, be provided with PID controller 11; The output of air conditioner end equipment 3 is connected with the input of pressure difference transmitter 4, the output of pressure difference transmitter 4 is connected with the input of deviate controller 5, the output of deviate controller 5 is connected with the input of PID controller 11, the output of PID controller 11 is connected with the input of secondary pump 2, and the output of secondary pump 2 is connected with the input of air conditioner end equipment 3.Wherein, the pressure difference signal of pressure difference transmitter 4 Real-time Obtaining air conditioner end equipments 3 is also delivered to deviate controller 5, deviate controller 5 has set in advance pressure differential resetting value, deviate controller 5 contrasts the pressure difference obtaining and pressure differential resetting value, according to the deviate of pressure difference and pressure differential resetting value, control pump variable frequency device 1, pump variable frequency device 1 and then Control PID controller 11, PID controller 11 regulates the flow of secondary pump 2, and then the flow of control inputs air conditioner end equipment 3.Because this variable flow water based on PID controller adopts secondary pump 2 and PID controller 11 combined control stream amounts, make the good stability of this variable flow water based on PID controller, thereby make good energy-conserving effect.
In the present embodiment, air conditioner end equipment 3 comprises air-treatment unit, air conditioner ventilation accessory and water tank.Wherein, air conditioner ventilation accessory comprises ventilator, ventilation shaft and blower fan.The pressure reduction that air-treatment unit, air conditioner ventilation accessory and water tank produce is respectively the total pressure head of air conditioner end equipment 3.
See Fig. 2.The embodiment 2 of a kind of variable flow water based on PID controller of the present utility model, the difference of the present embodiment and embodiment 1 is, in the present embodiment, variable flow water based on PID controller also comprises that bypass pipe 6 and 7, cyclic systems of a cyclic system 7 are connected with secondary pump 2 by bypass pipe 6.Wherein, cyclic system 7 comprises handpiece Water Chilling Units 71, pump 72 and for water return pipeline 73; The output of handpiece Water Chilling Units 71 is connected with the input of a pump 72, and the output of a pump 72 is by being connected with the input of handpiece Water Chilling Units 71 for water return pipeline 73.Wherein, the quantity of handpiece Water Chilling Units 71 is set to two, two handpiece Water Chilling Units 71 connections parallel with one another.Wherein, a pump 72 is responsible for the preparation of chilled water, and its pressure head providing is for overcoming the drag losses of a cyclic system 7.Other structure and the operation principle of the present embodiment are identical with embodiment 1, do not repeat them here.
Finally should be noted that; above embodiment is the restriction for the technical solution of the utility model is described but not to the utility model protection domain only; although the utility model is explained in detail with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.
Claims (6)
1. the variable flow water based on PID controller, is characterized in that: comprise pump variable frequency device, secondary pump, air conditioner end equipment, pressure difference transmitter and deviate controller; In described pump variable frequency device, be provided with PID controller; The output of described air conditioner end equipment is connected with the input of described pressure difference transmitter, the output of described pressure difference transmitter is connected with the input of described deviate controller, the output of described deviate controller is connected with the input of described PID controller, the output of described PID controller is connected with the input of described secondary pump, and described secondary delivery side of pump is connected with the input of described air conditioner end equipment.
2. a kind of variable flow water based on PID controller according to claim 1, is characterized in that: described air conditioner end equipment comprises air-treatment unit, air conditioner ventilation accessory and water tank.
3. a kind of variable flow water based on PID controller according to claim 2, is characterized in that: described air conditioner ventilation accessory comprises ventilator, ventilation shaft and blower fan.
4. a kind of variable flow water based on PID controller according to claim 1, it is characterized in that: the described variable flow water based on PID controller also comprises bypass pipe and a cyclic system, a described cyclic system is connected with described secondary pump by described bypass pipe.
5. a kind of variable flow water based on PID controller according to claim 4, is characterized in that: a described cyclic system comprises handpiece Water Chilling Units, a pump and supplies water return pipeline; The output of described handpiece Water Chilling Units is connected with the input of a described pump, and a described delivery side of pump is connected with the input of described handpiece Water Chilling Units for water return pipeline by described.
6. a kind of variable flow water based on PID controller according to claim 5, is characterized in that: the quantity of described handpiece Water Chilling Units is set to two, two described handpiece Water Chilling Units connections parallel with one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320536354.9U CN203501350U (en) | 2013-08-30 | 2013-08-30 | PID (Proportional, Integral and Derivative) controller-based variable flow rate air conditioner water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320536354.9U CN203501350U (en) | 2013-08-30 | 2013-08-30 | PID (Proportional, Integral and Derivative) controller-based variable flow rate air conditioner water system |
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| Publication Number | Publication Date |
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| CN203501350U true CN203501350U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320536354.9U Expired - Fee Related CN203501350U (en) | 2013-08-30 | 2013-08-30 | PID (Proportional, Integral and Derivative) controller-based variable flow rate air conditioner water system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168404A (en) * | 2016-07-13 | 2016-11-30 | 昆山台佳机电有限公司 | The secondary pump air-conditioner water system flow-changing control method of temperature difference correction and device |
| CN112378005A (en) * | 2020-11-19 | 2021-02-19 | 浙江永德信宜居科技有限公司 | Primary and secondary water pumping system of air conditioner water system and energy-saving adjusting method thereof |
-
2013
- 2013-08-30 CN CN201320536354.9U patent/CN203501350U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168404A (en) * | 2016-07-13 | 2016-11-30 | 昆山台佳机电有限公司 | The secondary pump air-conditioner water system flow-changing control method of temperature difference correction and device |
| CN112378005A (en) * | 2020-11-19 | 2021-02-19 | 浙江永德信宜居科技有限公司 | Primary and secondary water pumping system of air conditioner water system and energy-saving adjusting method thereof |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20140830 |
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| EXPY | Termination of patent right or utility model |