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1. (WO2018043571) FREEZING APPARATUS
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Pub. No.: WO/2018/043571 International Application No.: PCT/JP2017/031182
Publication Date: 08.03.2018 International Filing Date: 30.08.2017
IPC:
F25B 47/02 (2006.01) ,F25B 1/00 (2006.01) ,F25B 49/02 (2006.01) ,F25D 21/06 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
B
REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
47
Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
02
Defrosting cycles
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
B
REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
1
Compression machines, plant or systems with non-reversible cycle
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
B
REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
49
Arrangement or mounting of control or safety devices
02
for compression type machines, plant or systems
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
D
REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS
21
Defrosting; Preventing frosting; Removing condensed or defrost water
06
Removing frost
Applicants:
ダイキン工業株式会社 DAIKIN INDUSTRIES, LTD. [JP/JP]; 大阪府大阪市北区中崎西2丁目4番12号梅田センタービル Umeda Center Building, 4-12, Nakazaki-Nishi 2-Chome, Kita-ku, Osaka-shi, Osaka 5308323, JP
Inventors:
阪江 覚 SAKAE, Satoru; --
近藤 東 KONDOU, Azuma; --
竹上 雅章 TAKEGAMI, Masaaki; --
野村 和秀 NOMURA, Kazuyoshi; --
Agent:
新樹グローバル・アイピー特許業務法人 SHINJYU GLOBAL IP; 大阪府大阪市北区南森町1丁目4番19号 サウスホレストビル South Forest Bldg., 1-4-19, Minamimori-machi, Kita-ku, Osaka-shi, Osaka 5300054, JP
Priority Data:
2016-17200902.09.2016JP
Title (EN) FREEZING APPARATUS
(FR) APPAREIL DE CONGÉLATION
(JA) 冷凍装置
Abstract:
(EN) Provided is a freezing apparatus that, even in the event of a refrigerant leak taking place during a defrosting operation of a utilization-side heat exchanger, is able to minimize the amount of leakage. In the case where the situation of refrigerant leakage in the surrounding environment of a utilization-side heat exchanger (52) fulfills a prescribed leakage condition when a defrosting operation is executed while the connection state of a four-way switching valve (22) is set to a defrosting connection state so as to allow a heat source-side heat exchanger (23) to function as an evaporator of a refrigerant and simultaneously allow the utilization-side heat exchanger (52) to function as a heat radiator of the refrigerant, a controller (70) performs density reduction control so as to reduce the density of the refrigerant in the utilization-side heat exchanger (52) while keeping the switching valve in the defrosting connection state.
(FR) L'invention concerne un appareil de congélation qui, même en cas de fuite de réfrigérant se produisant pendant une opération de dégivrage d'un échangeur de chaleur côté utilisation, est apte à réduire au minimum la quantité de fuite. Dans le cas où la situation de fuite de réfrigérant dans l'environnement ambiant d'un échangeur de chaleur côté utilisation (52) remplit une condition de fuite prescrite lorsqu'une opération de dégivrage est exécutée au moment où l'état de connexion de la vanne de commutation à quatre voies (22) est réglé à un état de connexion de dégivrage permettant simultanément à l'échangeur de chaleur côté source de chaleur (23) de fonctionner comme un évaporateur de réfrigérant et l'échangeur de chaleur côté utilisation (52) de fonctionner comme un radiateur de chaleur de réfrigérant, alors le dispositif de commande (70) effectue une commande de réduction de densité afin de réduire la densité du réfrigérant dans l'échangeur de chaleur côté utilisation (52) tout en maintenant la vanne de commutation dans l'état de connexion de dégivrage.
(JA) 利用側熱交換器の除霜運転時に冷媒漏洩が生じた場合であっても、漏洩量を少なく抑えることが可能な冷凍装置を提供する。コントローラ(70)は、四路切換弁(22)の接続状態を熱源側熱交換器(23)を冷媒の蒸発器として機能させつつ利用側熱交換器(52)を冷媒の放熱器として機能させる除霜用接続状態として除霜運転を実行している際に、利用側熱交換器(52)の周囲における冷媒漏洩状況が所定漏洩条件を満たした場合には、切換弁を除霜用接続状態に維持させたままで利用側熱交換器(52)における冷媒密度を下げる密度低下制御を行う。
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Designated States: 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, JO, KE, KG, KH, 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
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)