Patent ID: 9739514
Date: 2017-08-22
CPC Classifications: F25B,Y02B

Claim:
1. A chiller apparatus comprising: a freezing cycle configured to cool; a refrigerant cycle configured to heat and that shares an evaporator provided to the freezing cycle; and a control apparatus that is interposed and connected within the refrigerant cycle, the control apparatus configured to provide selective temperature setting within a predetermined temperature range for use by a user while using various apparatuses to be temperature control targets as a temperature controlled device, the control apparatus configured to control a rotational speed of an electric compressor provided to the freezing cycle and a heating temperature in a heating apparatus for heating of a refrigerant provided to the refrigerant cycle according to a temperature difference between a set temperature set by the user and a temperature controlled device temperature detected by a first temperature sensor configured to detect a temperature of refrigerant flowing to the temperature controlled device, wherein at a time of temperature control setting with a small temperature difference between the set temperature and the temperature controlled device temperature, the refrigerant cycle has a second temperature sensor that is provided on a near side of refrigerant inflow to the heating apparatus on the refrigerant discharge side of the evaporator, and is configured to detect a refrigerant temperature, and at a time of temperature control setting with the small temperature difference between the set temperature and the temperature controlled device temperature, the control apparatus (i) performs serial communication of a drive control signal for an inverter configured to drive the electric compressor, the control signal being generated based on a result of a PID operation including proportion, integration and differential calculus about a refrigerant cycle side refrigerant detection temperature detected by the second temperature sensor, and (ii) controls the compressor rotational speed in the electric compressor according to the temperature controlled device temperature within a certain range.