US 9,810,466 B2
Heat pump system
Masahiro Honda, Ostend (BE)
Assigned to Daikin Industries, Ltd., Osaka (JP)
Appl. No. 13/202,374
Filed by Masahiro Honda, Ostend (BE)
PCT Filed Feb. 23, 2010, PCT No. PCT/JP2010/001184
§ 371(c)(1), (2), (4) Date Aug. 19, 2011,
PCT Pub. No. WO2010/098071, PCT Pub. Date Sep. 2, 2010.
Claims priority of application No. 2009-040981 (JP), filed on Feb. 24, 2009.
Prior Publication US 2012/0036876 A1, Feb. 16, 2012
Int. Cl. F25B 27/00 (2006.01); F25B 49/02 (2006.01); F24D 11/02 (2006.01); F24D 17/02 (2006.01); F25B 13/00 (2006.01); F25B 30/02 (2006.01)
CPC F25B 49/022 (2013.01) [F24D 11/0214 (2013.01); F24D 17/02 (2013.01); F25B 13/00 (2013.01); F25B 30/02 (2013.01); F25B 2313/02334 (2013.01); F25B 2313/02741 (2013.01); F25B 2339/047 (2013.01); F25B 2400/13 (2013.01); F25B 2600/021 (2013.01); F25B 2600/0253 (2013.01); F25B 2600/2515 (2013.01); F25B 2700/1931 (2013.01); F25B 2700/2104 (2013.01); F25B 2700/2106 (2013.01); F25B 2700/21161 (2013.01); F25B 2700/21163 (2013.01); Y02B 30/126 (2013.01); Y02B 30/741 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A heat pump system comprising:
a heat source unit having a variable-capacity compressor, a pressure sensor disposed in an outlet of the compressor, and a heat-source-side heat exchanger functioning as an evaporator for a refrigerant;
a plurality of usage units connected to the heat source unit, each of the usage units having a usage-side heat exchanger that functions as a radiator for the refrigerant, the plurality of units being a plurality of first usage units capable of heating an aqueous medium through radiation by the refrigerant in the individual usage-side heat exchangers, and a temperature sensor being provided at an outlet of each of the usage-side heat exchangers; and
a controller including a computer configured to control the heat pump system,
the heat source unit and the plurality of the first usage units constituting a heat source refrigerant circuit in which the refrigerant circulates,
the plurality of first usage units constituting an aqueous medium circuit in which the aqueous medium circulates, and
the controller being further configured to
derive an equivalent target value to control an operating capacity of the compressor based on a usage temperature required in the individual usage units, the equivalent target value being determined based on an aqueous medium outlet temperature which is a temperature of the aqueous medium at the outlet of each of the usage-side heat exchangers,
select a greatest value among the equivalent target values of the individual first usage units, and
control the operating capacity of the compressor to bring discharge pressure of the compressor, or a state quantity equivalent thereto, to a target value thereof based on the greatest value among the equivalent target values of the individual first usage units, and
the controller being further configured to control a refrigerant flow rate control valve disposed in the first usage for which the target value is greater than the first equivalent target value by using a correction value based on a differential of the target value and the equivalent target value.