Title:
HEAT PUMP TYPE WATER HEATER
Document Type and Number:
Japanese Patent JP2017044376
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a heat pump type water heater capable of performing determination of whether or not capacity of the entire device is deteriorating in a short time.SOLUTION: A control device 300 for performing control of the entire heat pump type water heater 10 selects a water temperature sensor which is mounted at the highest position out of water temperature sensors 110 in which a measured value of water temperature is below a threshold value as a sensor for capacity determination. Then, it performs determination of whether or not the capacity of the heat pump type water heater 10 is deteriorating, in a state where heating of water by a heater 200 is being performed, based on the change speed of the water temperature measured by the sensor for capacity determination.SELECTED DRAWING: Figure 1
Inventors:
FURUKAWA TADAO
Application Number:
JP2015165546A
Publication Date:
March 02, 2017
Filing Date:
August 25, 2015
Export Citation:
Assignee:
DENSO CORP
International Classes:
F24H1/00
Attorney, Agent or Firm:
Toru Kamada
Takuma Tsuda
Kentaro Ito
Takuma Tsuda
Kentaro Ito