Heating apparatus

A heating apparatus comprising:

• a thermal storage tank that stores a heated heat medium;
• a heating circulation channel connected to a high-temperature side and a low-temperature side of the thermal storage tank, and through which the heat medium circulates;
• a heat exchanger provided to the heating circulation channel and configured to exchange heat between the heat medium and a heating object and to heat the heating object;
• a circulation direction switching device configured to switch circulation of the heat medium in the heating circulation channel between a forward direction from the high-temperature side of the thermal storage tank to the low-temperature side of the thermal storage tank and a backward direction from the low-temperature side of the thermal storage tank to the high-temperature side of the thermal storage tank;
• and
• a controller configured to cause the heat medium to circulate in the forward direction set by switching of the circulation direction switching device in a heating operation of the heating object and cause the heat medium to circulate in the backward direction set by switching of the circulation direction switching device after a stop of the heating operation of the heating object, wherein
• the controller is further configured to cause the heat medium to circulate in the backward direction set by switching of the circulation direction switching device for a second predetermined time or for a predetermined total flow rate such that only the heat medium at a temperature higher than a first predetermined temperature in the heating circulation channel is returned to the thermal storage tank.

A heating apparatus comprising:

• a thermal storage tank that stores a heated heat medium;
• a heating circulation channel connected to a high-temperature side and a low-temperature side of the thermal storage tank, and through which the heat medium circulates;
• a heat exchanger provided to the heating circulation channel and configured to exchange heat between the heat medium and a heating object and to heat the heating object;
• a circulation direction switching device configured to switch circulation of the heat medium in the heating circulation channel between a forward direction from the high-temperature side of the thermal storage tank to the low-temperature side of the thermal storage tank and a backward direction from the low-temperature side of the thermal storage tank to the high-temperature side of the thermal storage tank;
• and
• a controller configured to cause the heat medium to circulate in the forward direction set by switching of the circulation direction switching device in a heating operation of the heating object and cause the heat medium to circulate in the backward direction set by switching of the circulation direction switching device after a stop of the heating operation of the heating object, wherein
• the controller is further configured to cause the heat medium to circulate in the backward direction set by switching of the circulation direction switching device until a temperature of the heat medium at a predetermined location of the heating circulation channel becomes lower than a second predetermined temperature.