A monitoring method to monitor efficiency of air-blowing devices in a ventilation system. First, an optimal system curve is provided. Then, the air-blowing devices are activated with a first current frequency to obtain a first fan performance curve of the air-blowing devices according to the first c
A monitoring method to monitor efficiency of air-blowing devices in a ventilation system. First, an optimal system curve is provided. Then, the air-blowing devices are activated with a first current frequency to obtain a first fan performance curve of the air-blowing devices according to the first current frequency and a test record. Next, first flow rates of the air-blowing devices are detected, and first system curves and efficiencies of the air-blowing devices are obtained by comparing the first flow rates with the first fan performance curve.
대표청구항▼
What is claimed is: 1. A method for monitoring operating efficiency of an air-blowing device in a ventilation system, comprising: providing an optimal system curve; activating the air-blowing device with a first current frequency, obtaining a first fan performance curve of the air-blowing device ac
What is claimed is: 1. A method for monitoring operating efficiency of an air-blowing device in a ventilation system, comprising: providing an optimal system curve; activating the air-blowing device with a first current frequency, obtaining a first fan performance curve of the air-blowing device according to the first current frequency and a test record, and obtaining a preferred efficiency of the air-blowing device by comparing the first fan performance curve with the optimal system curve; detecting a first flow rate of the air-blowing device; obtaining a first system curve and a first efficiency by comparing the first flow rate to the first fan performance curve; estimating an operating efficiency of the air-blowing device by comparing the first efficiency with the preferred efficiency; and outputting a preferred fan performance curve and operating point. 2. The method as claimed in claim 1, wherein the optimal system curve is achieved from a predicted flow rate Q0 and a predicted pressure drop P0. 3. The method as claimed in claim 2, wherein the optimal system curve is achieved by following steps: obtaining a constant K0 by substituting the predicted flow rate Q0 and the predicted pressure drop P0 into formula P0=K0횞Q02; and achieving the optimal system curve from formula P=K0 횞Q2 wherein P represents pressure drop and Q represents flow rate. 4. The method as claimed in claim 1, further comprising controlling an activating current frequency of the air-blowing device to bring an operating efficiency thereof to a preferred efficiency. 5. The method as claimed in claim 1, wherein the air-blowing device is a centrifugal fan. 6. A method for monitoring an operating efficiency of an air-blowing device in a ventilation system, comprising: providing an optimal system curve; detecting a first flow rate of the air-blowing device; activating the air-blowing device with a first current frequency, obtaining a first fan performance curve of the air-blowing device according to the first current frequency and a test record, and obtaining a preferred efficiency of the air-blowing device by comparing the first fan performance curve with the optimal system curve; detecting a first pressure drop at an inlet port of the air-blowing device; obtaining a first efficiency by comparing the first flow rate with the first pressure drop; estimating an operating efficiency of the air-blowing device by comparing the first efficiency with the preferred efficiency; and outputting a preferred fan performance curve and operating point. 7. The method as claimed in claim 6, wherein the optimal system curve is achieved from a predicted flow rate Q0 and an predicted pressure drop P0. 8. The method as claimed in claim 7, wherein the optimal system curve is achieved by following steps: obtaining a constant K0 by substituting the predicted flow rate Q0 and the predicted pressure drop P0 into formula P0=K0횞Q02; and achieving the optimal system curve from formula P=K0 횞Q2, wherein P represents pressure drop and Q represents flow rate. 9. The method as claimed in claim 6, further comprising controlling an activating current frequency of the air-blowing device to bring an operating efficiency thereof to the preferred efficiency. 10. The method as claimed in claim 6, wherein the air-blowing device is a centrifugal fan. 11. A system for monitoring an operating efficiency of an air-blowing device in a ventilation system, comprising: a control box, activating the air-blowing device; a flow rate sensor, detecting flow rate of the air-blowing device; a controller, coupled with the control box and the flow rate sensor, and controlling a current frequency of the air-blowing device according to the flow rate; and wherein the controller pre-storing an optimal system curve, activating the air-blowing device with a first current frequency, obtaining a first fan performance curve of the air-blowing device according to the first current frequency and a test record, obtaining a preferred efficiency of the air-blowing device by comparing the first fan performance curve with the optimal system curve, obtaining a first flow rate of the air-bowering device from the flow rate sensor, obtaining a first system curve and a first efficiency by comparing the first flow rate to the first fan performance curve, and estimating an operating efficiency of the air-blowing device by comparing the first efficiency with the preferred efficiency. 12. The system as claimed in claim 11, further comprising a pressure sensor, detecting pressure drop at an inlet port of the air-blowing device, wherein the pressure sensor is coupled with the controller and the controller controls current frequency of the air-blowing device according to the flow rate and the pressure drop. 13. A method for monitoring operating efficiency of a plurality of air-blowing devices in a ventilation system, comprising: providing a optimal system curve; activating the air-blowing devices with a first current frequency, obtaining a first fan performance curve of the air-blowing devices according to the first current frequency and a test record, and obtaining a preferred efficiency of the air-blowing devices by comparing the first fan performance curve with the optimal system curve; detecting a plurality of first flow rates of the air-blowing devices; obtaining first efficiency by comparing the first flow rates with the first fan performance curves; estimating operating efficiency of the air-blowing devices by comparing the first efficiency with the preferred efficiency; and outputting a preferred fan performance curve and operating point. 14. The method as claimed in claim 13, wherein the optimal system curve is achieved from a predicted flow rate Q0 and an predicted pressure drop P0. 15. The method as claimed in claim 14, wherein the optimal system curve is achieved by following steps: obtaining a constant K0 by substituting the predicted flow rate Q0 and the predicted pressure drop P0 into formula P0=K 0횞Q02; and achieving the optimal system curve from formula P=K0 횞Q2, wherein P represents pressure drop and Q represents flow rate. 16. The method as claimed in claim 13, further comprising controlling activating current frequencies of the air-blowing devices to bring an operating efficiency thereof to the preferred efficiency. 17. The method as claimed in claim 13, wherein the air-blowing devices are centrifugal fans. 18. A method for monitoring operating efficiency of a plurality of air-blowing devices in a ventilation system, comprising: providing a optimal system curve; detecting a plurality of first flow rates of the air-blowing devices; activating the air-blowing devices with a first current frequency, obtaining a first fan performance curve of the air-blowing devices according to the first current frequency and a test record, and obtaining a preferred efficiency of the air-blowing devices by comparing the first fan performance curve with the optimal system curve; detecting a plurality of first pressure drops at a plurality of inlet ports of the air-blowing devices; obtaining first efficiency by comparing the first flow rates with the first pressure drops; estimating operating efficiency of the air-blowing devices by comparing the first efficiency with the preferred efficiency; and outputting a preferred fan performance curve and operating point. 19. The method as claimed in claim 18, wherein the optimal system curve is achieved from a predicted flow rate Q0 and an predicted pressure drop P0. 20. The method as claimed in claim 19, wherein the optimal system curve is achieved by following steps: obtaining a constant K0 by substituting the predicted flow rate Q0 and the predicted pressure drop P0 into formula P0=K 0횞Q02; and achieving the optimal system curve from formula P=K0 횞Q2wherein P represents pressure drop and Q represents flow rate. 21. The method as claimed in claim 18, further comprising controlling activating current frequencies of the air-blowing devices to bring operating efficiency thereof to the preferred efficiency. 22. The method as claimed in claim 18, wherein the air-blowing devices are centrifugal fans. 23. A system for monitoring operating efficiency of a plurality of air-blowing devices in a ventilation system, comprising: a control box, activating the air-blowing devices; a plurality of flow rate sensors, detecting flow rates of the air-blowing devices; and a controller, coupled with the control box and the flow rate sensors, and controlling current frequencies of the air-blowing devices according to the flow rates, wherein the controller pre-storing an optimal system curve, activating the air-blowing devices with a first current frequency, obtaining a first fan performance curve of the air-blowing devices according to the first current frequency and a test record, obtaining a preferred efficiency of the air-blowing devices by comparing the first fan performance curve with the optimal system curve, obtaining a plurality of first flow rates of the air-blowing devices from the flow rate sensors, obtaining first efficiency by comparing the first flow rates to the first fan performance curves, and estimating operating efficiency of the air-blowing devices by comparing the first efficiency with the preferred efficiency. 24. The system as claimed in claim 23, further comprising a plurality of pressure sensors, detecting pressure drops at a plurality of inlet ports of the air-blowing devices, wherein the pressure sensors are coupled with the controller and the controller controls current frequencies of the air-blowing devices according to the flow rates and the pressure drops.
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이 특허에 인용된 특허 (2)
Oshima Takeharu,JPX ; Kotoh Satoru,JPX ; Doi Akira,JPX ; Imamura Yachiyo,JPX ; Tachibana Isao,JPX ; Kobayashi Shigeki,JPX, Air ventilation or air supply system.
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