| 摘要 |
PROBLEM TO BE SOLVED: To provide the control technology of a hot water floor heater capable of increasing a speed of temperature rise of the circulated water for heating, and shortening a setting time in starting the operation or in performing the change to rise a set temperature. SOLUTION: This hot water heater comprises a transient target temperature setting means 34 for setting a refrigerant target temperature T<SB>rt</SB>and a hot water target temperature T<SB>wt</SB>to a temperature higher than a refrigerant target temperature T<SB>r0</SB>and a hot water set temperature T<SB>w0</SB>in stationary operation, when the operation is started or when the hot water set temperature T<SB>w0</SB>is switched by a temperature setting means 37, and when a circulated water temperature T<SB>w</SB>is lower than the hot water set temperature T<SB>w0</SB>, and a target temperature resetting means 35 for resetting the refrigerant target temperature T<SB>rt</SB>and the hot water target temperature T<SB>wt</SB>to the refrigerant target temperature T<SB>r0</SB>and the hot water set temperature T<SB>w0</SB>in stationary operation, when the circulated water temperature T<SB>w</SB>is over a value obtained by adding a specific raising valueβto the hot water set temperature T<SB>w0</SB>in a stationary time. COPYRIGHT: (C)2005,JPO&NCIPI |
