Patent SG-11201803484Q-A (SG)
Title: Method of detecting a loss of refrigerant charge of a refrigeration system
Inventor: SUN JIAN
IPC: F25B49/02
Filed: 2016-11-17
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 26 May 2017(26.05.2017) WIPOIPCT (10) International Publication Number WO 2017/087628 A1 (51) International Patent Classification: F25B 9/00 (2006.01) F25B 49/02 (2006.01) F25B 1/10 (2006.01) (21) International Application Number: PCT/US2016/062458 (22) International Filing Date: 17 November 2016 (17.11.2016) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/256,557 17 November 2015 (17.11.2015) US (71) Applicant: CARRIER CORPORATION [US/US]; One Carrier Place, Farmington, Connecticut 06032 (US). (72) Inventors: SUN, Jian; P.O. Box 4805, Carrier Parkway, TR-19, Syracuse, New York 13221 (US). LIU, Lucy Yi; P.O. Box 4805, Carrier Parkway, TR-19, Syracuse, New York 13221 (US). (74) Agent: BURNS, David; Cantor Colburn LLP, 20 Church Street, 22nd Floor, Hartford, Connecticut 06103-3207 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, [Continued on next page] (54) Title: METHOD OF DETECTING A LOSS OF REFRIGERANT CHARGE OF A REFRIGERATION SYSTEM (57) : A method of determining charge loss of a refrigeration system includes the steps of inputting an ambient temperature, a box temperature, and a compressor speed into an electronic controller of the refrigeration system, and calculating a first air side temperature difference across an evaporator by applying an algorithm having a first T-Map representative of normal operating conditions. The controller may then confirm a detection prerequisite is satisfied. Upon confirmation, the controller calculates a second air side temperature difference across the evaporator by applying the algorithm having a second T-Map representative of a loss of refrigerant charge. An action may then be taken from the controller if the first air side temperature difference is less than the second air side temperature difference. 00 n 00 FIG. 4 WO 2017/087628 A11II llll IIII III Hill III III III III Hill 111 II lllll 11 III mill llll III III LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: — as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(H)) — as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17(iii)) — of inventorship (Rule 4.17 (iv)) Published: — with international search report (Art. 21(3))