| 摘要 |
PROBLEM TO BE SOLVED: To control the operation of a compressor so that the cycle efficiency can be optimized with simple and inexpensive constitution even in case that a carbon dioxide refrigerant is used. SOLUTION: This heat pump hot water supplier is equipped with an evaporator temperature detector 42 which detects the temperature of an evaporator 15, an intake-side temperature detector 43 which detects the intake side temperature of the compressor 11, a discharge-side temperature detector 41 which detects the temperature on discharge side of the compressor 11, and an operation controller 37 which computes the operation frequency of the compressor 11 so that the cycle efficiency may be optimized, based on the measured value from the evaporator temperature detector 42, the intake-side temperature detector 43, and the discharge-side temperature detector 41 and controls that compressor 11, and this controls the operation of the compressor 11 so that the cycle efficiency can be optimized with simple and inexpensive constitution. |
