ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALTRBGCZEEHUPLSKBAHRIS..MTNORSMESM..................JDIM360 Ver 2.40 (30 Jan 2013) - 1620000/02551612EUROPEAN PATENT APPLICATIONA320140326EP12177749.420120725enenen201116635320110729JP2014032620141320130130201305F25B 1/10 20060101AFI20140217BHEP F25B 9/00 20060101ALI20140217BHEP F25B 31/00 20060101ALI20140217BHEP F25B 49/02 20060101ALI20140217BHEP deWärmepumpe mit superkritischem ZyklusenSupercritical-cycle heat pumpfrPompe à chaleur à cycle supercritique1Mitsubishi Heavy Industries1001797053H15520/653.BOW16-5, Konan 2-chome, Minato-kuTokyo 108-8215JPHotta, Youheic/o MITSUBISHI HEAVY INDUSTRIES, LTD. 16-5, Konan 2-chomeMinato-Ku, Tokyo, 108-8215JPKimata, Yoshiyukic/o MITSUBISHI HEAVY INDUSTRIES, LTD. 16-5, Konan 2-chomeMinato-Ku, Tokyo, 108-8215JPSato, Hajimec/o MITSUBISHI HEAVY INDUSTRIES, LTD. 16-5, Konan 2-chomeMinato-Ku, Tokyo, 108-8215JPGoto, Toshiyukic/o MITSUBISHI HEAVY INDUSTRIES, LTD. 16-5, Konan 2-chomeMinato-Ku, Tokyo, 108-8215JPIntès, Didier Gérard Andréet al100042673Cabinet Beau de Loménie 158, rue de l'Université75340 Paris Cedex 07FRALATBEBGCHCYCZDEDKEEESFIFRGBGRHRHUIEISITLILTLULVMCMKMTNLNOPLPTRORSSESISKSMTRBAME20140326201413

A supercritical-cycle heat pump (1) that employs CO2 refrigerant as a working medium that is provided with an injection circuit (11) for injecting intermediate-pressure refrigerant gas being separated by a gas-liquid separator 6 into a sealed housing (14), having intermediate pressure in the interior thereof, in a multistage compressor (2), a controller (25) is provided, which determines the viscosity of the POE oil (17) on the basis of the solubility of the POE oil (17) in the CO2 refrigerant and temperature of the POE oil (17), the solubility of the POE oil (17) in the CO2 refrigerant being determined by pressure and temperature of intermediate-pressure refrigerant and which controls the pressure of the intermediate-pressure refrigerant by controlling a first electronic expansion valve (5) so that the pressure thereof is controlled within a preset usage limit range in order to keep the viscosity of the POE oil (17) above the certain viscosity zone.

3H15520/653.BOWEP12177749.4Mitsubishi Heavy Industries1MN20140221F25BEP2175212A1DAIKIN IND LTD [JP]20100414A1-3* paragraph [0035] - paragraph [0154]; figures 1-11 *GB2446062AGRASSO GMBH REFRIGERATION TECH [DE] GRASSO GMBH REFRIGERATION TECHNOLO20080730A1-3* page 16, line 13 - page 19, line 33; figures 1-2 *EP0976991A2ZEXEL CORP [JP] ZEXEL VALEO CLIMATE CONTR CORP [JP]20000202A1-3* paragraph [0019] - paragraph [0037]; figures 1-9 *US2006032267A1KAMIMURA ICHIRO [JP] ET AL20060216A1-3* paragraph [0022] - paragraph [0057]; figures 1-6 *Szilagyi, BarnabasMunich20140206EP2175212A120100414AU2008272365A120090108CN101688700A20100331EP2175212A120100414JP2009014210A20090122KR20100036345A20100407US2010175400A120100715WO2009004761A120090108GB2446062A20080730DE102007003989A120080731GB2446062A20080730JP2008185327A20080814EP0976991A220000202DE69908716D120030717DE69908716T220040115EP0976991A220000202JP2000046420A20000218US6250099B120010626US2006032267A120060216JP2006053390A20060223US2006032267A120060216