A constant temperature control method and system

Abstract

The invention discloses a constant temperature control method, which calculates the temperature error, the cumulative sum of errors and the temperature control output, and when the temperature control output is greater than the first preset threshold value, adjusts the power of the heater according to the first preset threshold value to obtain the preset constant temperature temperature And detection voltage, calculate the temperature error according to the preset constant temperature and detection voltage, and judge whether the temperature error is less than zero. Two preset thresholds, adjust the power of the heater according to the second preset threshold, obtain the preset constant temperature and detection voltage, calculate the temperature error according to the preset constant temperature and detection voltage, and judge whether the temperature error is greater than zero, if the judgment is yes, calculate Accumulated sum of errors, if the judgment is negative, the accumulated sum of errors will not be calculated. Correspondingly, the invention also discloses a constant temperature control system. By adopting the invention, timely adjustment can be carried out according to the real-time water temperature, and the stability of temperature adjustment can be improved.

Description

technical field [0001] The invention relates to a bathroom equipment control technology, in particular to a constant temperature control method and system. Background technique [0002] At present, bathing equipment such as bathtubs and the like all have a constant temperature function to control the water temperature at a preset temperature. The commonly used method uses the hysteresis loop control method to detect the water temperature in real time, control the heater to heat when the water temperature is lower than the lower limit, and control the heater to stop heating when the water temperature is higher than the upper limit, so as to control the water temperature at one of the preset temperature. within the range. [0003] The comparative document CN204246022U discloses a dynamic constant temperature static bath instrument, which is characterized in that: the static bath instrument includes a housing, a power line, a water inlet and a water outlet are arranged on the ...

AI Technical Summary

Problems solved by technology

[0004] However, in the hysteresis control of the prior art, if the difference between the lower limit value and the upper limit value is too large, it is easy to cause the temperature to swing back and forth between the two set values; otherwise, the relay will be opened many times in a short time. Close the heater, damage the life of the heater

Images