US 12,173,918 B2
Air-conditioning apparatus and air handling unit
Yusuke Tsuji, Tokyo (JP); Kimitaka Kadowaki, Tokyo (JP); Koji Azuma, Tokyo (JP); and Yasushi Okoshi, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 16/965,736
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Feb. 22, 2018, PCT No. PCT/JP2018/006367
§ 371(c)(1), (2) Date Jul. 29, 2020,
PCT Pub. No. WO2019/163042, PCT Pub. Date Aug. 29, 2019.
Prior Publication US 2021/0033302 A1, Feb. 4, 2021
Int. Cl. F24F 11/74 (2018.01); F24F 1/0059 (2019.01); F24F 110/10 (2018.01); F25B 1/04 (2006.01); F25B 30/02 (2006.01)
CPC F24F 11/74 (2018.01) [F24F 1/0059 (2013.01); F24F 2110/10 (2018.01); F24F 2221/54 (2013.01); F25B 1/04 (2013.01); F25B 30/02 (2013.01); F25B 2313/0231 (2013.01); F25B 2600/2513 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An air-conditioning apparatus, comprising:
a heat source side unit configured to heat or cool a heat medium used as a heat-conveying medium;
an air handling side heat exchanger that exchanges heat between outside air that is sent into a building and the heat medium; and
an indoor side heat exchanger that exchanges heat between indoor air and the heat medium, wherein
the heat source side unit, the air handling side heat exchanger, and the indoor side heat exchanger are connected by piping to each other to form a heat medium cycle circuit through which the heat medium circulates,
in the heat medium cycle circuit, a portion of the heat medium heated or cooled by the heat source side unit flows into the indoor side heat exchanger after having passed through the air handling side heat exchanger,
the heat medium cycle circuit is provided with an air handling side flow rate control valve configured to adjust a flow rate of the heat medium that passes through the air handling side heat exchanger, and
the air-conditioning apparatus further comprises an air handling side amount-of-heat detection device configured to detect an amount of heat that is exchanged in the air handling side heat exchanger,
wherein the air handling side amount-of-heat detection device includes
an air handling inlet side temperature sensor configured to detect a temperature of the heat medium that flows into the air handling side heat exchanger,
an air handling outlet side temperature sensor configured to detect a temperature of the heat medium that flows out from the air handling side heat exchanger,
an air handling inlet side pressure sensor configured to detect a pressure of the heat medium that flows into the air handling side heat exchanger,
an air handling outlet side pressure sensor configured to detect a pressure of the heat medium that flows out from the air handling side heat exchanger, and
an air handling unit controller configured to calculate, on a basis of the temperature detected by the air handling inlet side temperature sensor, the temperature detected by the air handling outlet side temperature sensor, the pressure detected by the air handling inlet side pressure sensor, the pressure detected by the air handling outlet side pressure sensor, and an opening degree of the air handling side flow rate control valve, an amount of heat that is exchanged in the air handling side heat exchanger,
wherein, in a case where an amount of heat required by the air handling side heat exchanger is larger than the amount of heat that is exchanged in the air handling side heat exchanger and an upper limit of a flow rate that is adjustable by the air handling side flow rate control valve is reached, a heat source side unit controller configured to control an amount of heating or an amount of cooling that the heat source side unit supplies to the heat medium controls the heat source side unit to increase an amount of heating or an amount of cooling that is imparted to the heat medium.