Direct liquid level controlling system with single-loop frequency-variable pump

A frequency conversion water pump and level control technology, applied in liquid level control, control/regulation system, non-electric variable control, etc., can solve the problems of increasing project cost and operating cost
CN1296787CInactive Publication Date: 2007-01-24天津市科华达科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
天津市科华达科技有限公司
Publication Date
2007-01-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The water reservoir, water pump, sealed container and user are contained via pipeline. The liquid level controlling system consists of container level loop, control level loop, container level detecting circuit, control level detecting circuit, information processing control circuit, on-off control circuit and the water pump. Via simple signal conversion, water pump motor rotation speed, instead of regulating valve, is regulated and this has high control sensitivity, less measurement lagging, and high control precision. The present invention can be used widely in water tower, industry boiler water supply, etc.
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Description

technical field

[0001] The invention relates to a liquid level control system, in particular to a direct liquid level level control system of a single-loop frequency conversion water pump. Background technique

[0002] At present, the water supply system at home and abroad is completed by a frequency conversion pump constant pressure control system and a liquid level control system. The general frequency conversion water pump constant pressure control system is composed of a pressure sensor transmitter (to measure the outlet pressure of the water pump), a digital regulator, and a frequency conversion water pump (executive agency) to form a constant pressure control system. The liquid level control system is composed of a differential pressure transmitter (to measure the liquid level length), a digital regulator and a regulating valve to form a liquid level control system.

[0003] In terms of control, the water supply system has defects such as measurement hysteresis, low s...

Claims

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