| Title |
A Study on the Temperature Control of Instant Hot Water in Tankless Water Purifier |
| Authors |
Hyeong-Seok Jo ; Woo-Cheol Lee |
| DOI |
http://doi.org/10.5207/JIEIE.2021.35.11.009 |
| Keywords |
Instant hot water; Stable temperature heating; Tankless water purifier; Temperature control |
| Abstract |
The instant hot water function of the tankless water purifier requires stable temperature control technique because water is passed the hot water module to which power is applied, and the water is instantaneously heated and supplied directly to the user. In this paper, we propose a method to optimize the preheating time by inserting a temperature sensor inside the hot water module to accurately check the current heating state of the hot water module and calculate the amount of heat required for heating to the target temperature. In addition, we propose a duty pattern of the triac on-off control method that makes it easy to calculate the amount of heat even when the control environment changes. The proposed technique is verified stable temperature heating effect through reducing the supplied time to user and deviation of hot water temperature of experiments for outlet temperature measurement using a tankless water purifier. |