Heat pump apparatus

Abstract

A heat pump apparatus according to the present disclosure is a heat pump apparatus for supplying a heat medium to a tank unit including a water heat exchanger for exchanging heat between the heat medium and water stored in a hot water storage tank. The heat pump apparatus includes a heat transfer performance determiner to determine heat transfer performance of the water heat exchanger, and a compressor controller. The compressor controller adjusts the rotation speed of the compressor during the hot water storage operation such that the rotation speed of the compressor when the heat transfer performance of the water heat exchanger is determined to be relatively low is higher than the rotation speed of the compressor when the heat transfer performance of the water heat exchanger is determined to be relatively high.

1 . A heat pump apparatus to supply a heat medium to a tank unit including a water heat exchanger to exchange heat between the heat medium and water stored in a hot water storage tank, the heat pump apparatus comprising:
 a compressor to compress refrigerant;   a heat medium heat exchanger to exchange heat between the refrigerant and the heat medium;   a heat transfer performance determiner to determine heat transfer performance of the water heat exchanger; and   a compressor controller to adjust a rotation speed of the compressor during a hot water storage operation, which is an operation for increasing a temperature of the water in the hot water storage tank,   wherein the compressor controller is configured to adjust the rotation speed of the compressor during the hot water storage operation such that the rotation speed of the compressor when the heat transfer performance of the water heat exchanger is determined to be relatively low is higher than the rotation speed of the compressor when the heat transfer performance of the water heat exchanger is determined to be relatively high.   
     
     
         2 . The heat pump apparatus according to  claim 1 , wherein the heat transfer performance determiner is configured to measure a required time for the hot water storage operation when the hot water storage operation is executed and determine the heat transfer performance depending on the required time as measured. 
     
     
         3 . The heat pump apparatus according to  claim 1 , wherein the heat transfer performance determiner is configured to measure a required time for the hot water storage operation when the hot water storage operation for increasing the temperature of the water in the hot water storage tank from a first temperature to a second temperature is executed, calculate a standard required time for the hot water storage operation for increasing the temperature of the water in the hot water storage tank from the first temperature to the second temperature, and compare the required time as measured with the standard required time to determine the heat transfer performance. 
     
     
         4 . The heat pump apparatus according to  claim 1 , wherein the heat transfer performance determiner is configured to present a plurality of options concerning types of the tank unit on a human interface and determine the heat transfer performance depending on an option selected from among the plurality of options. 
     
     
         5 . The heat pump apparatus according to  claim 4 , wherein the heat transfer performance determiner is configured to cause a display of the human interface to display icons corresponding to each of the plurality of options when presenting the plurality of options. 
     
     
         6 . The heat pump apparatus according to  claim 4 , wherein the plurality of options include at least two options among an option indicating the tank unit of a first type in which water is circulated with a pump in a circulation circuit that connects the water heat exchanger arranged outside the hot water storage tank to the hot water storage tank, an option indicating the tank unit of a second type in which a heat medium pipe included in the water heat exchanger is arranged inside the hot water storage tank, and an option indicating the tank unit of a third type in which the heat medium pipe included in the water heat exchanger is in contact with an outer wall of the hot water storage tank. 
     
     
         7 . The heat pump apparatus according to  claim 6 , wherein the heat transfer performance determiner is configured to determine that the heat transfer performance of the first type is the highest among the first type, the second type, and the third type, determine that the heat transfer performance of the second type is the second highest, and determine that the heat transfer performance of the third type is the lowest.