Temperature management system

Temperature management system for a lubricant present in a lubricant reservoir of a compressor system of a heat pump that a working medium flows through, comprising:

• a temperature probe or sensor configured to measure an actual lubricant temperature of the lubricant,
• a control unit in operative signal communication with the temperature probe or sensor and is configured to determine whether the measured actual lubricant temperature is within a target lubricant temperature range;
• a temperature controller in operative signal communication with the control unit and configured to heat or cool the lubricant;
• and
• a pressure sensor communicatively connected to the control unit and configured to measure a pressure present in the lubricant reservoir;
• wherein the control unit is further configured to
• a. cause the temperature controller to cool the lubricant when the actual lubricant temperature is above the target lubricant temperature range, and
• b. cause the temperature controller to heat up the lubricant when the actual lubricant temperature is below the target lubricant temperature range;
• wherein the target lubricant temperature range has a lower temperature limit and an upper temperature limit, wherein the lower temperature limit corresponds to a condensation temperature of the working medium based on a pressure present in the lubricant reservoir, wherein the pressure is measured by the pressure sensor, wherein the upper temperature limit that is 2-K-15-K above the condensation temperature of the working medium;
• and wherein the control unit is further configured to
• c. determine the lower temperature limit at a predetermined time based on the pressure measured in the lubricant reservoir at said predetermined time.