Automatic constant-temperature control system based on over-temperature protection and applied to circulating water pump

Abstract

The invention discloses an automatic constant-temperature control system based on over-temperature protection and applied to a circulating water pump. The automatic constant-temperature control system comprises the circulating water pump, a frequency converter connected with a control terminal of the circulating water pump, a pressure regulator, a temperature regulator, a pressure sensor arranged at a water outlet of the circulating water pump, a temperature sensor arranged at a water inlet of the circulating water pump and a temperature signal conversion module connected with the temperature sensor, wherein the pressure regulator and the temperature regulator are connected with the frequency converter, and the pressure sensor is connected with the pressure regulator. The automatic constant temperature control system is characterized in that the temperature signal conversion module is connected with the temperature regulator through an anti-interference module. The automatic constant temperature control system can filter interference signals and prevent the interference signals from influencing water temperature signals, thereby improving the water temperature control accuracy.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a constant temperature automatic control system for circulating water pumps based on over-temperature protection. Background technique [0002] At present, the flow and pressure difference of the circulating water pump system are adjusted by valves and bypasses. Therefore, there are inevitably large interception losses, large flow, high pressure, and low temperature differences. The flow of the water pump is automatically adjusted by the change of the temperature, which leads to the temperature of the circulating water not being able to fully dissipate heat at the user end, and it flows back to the heat source, causing unnecessary waste. At the same time, it is impossible to maintain a constant temperature value of the circulating water. When the water temperature is too high or too low, it is not suitable for occasions requiring constant temperature. How to solve the above prob...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the traditional circulating water pump system cannot automatically control the temperature of circulating water, and provide a constant temperature automatic control system for circulating water pumps based on over-temperature protection

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