(19)
(11) EP 4 464 958 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.02.2025 Bulletin 2025/09

(43) Date of publication A2:
20.11.2024 Bulletin 2024/47

(21) Application number: 24204658.9

(22) Date of filing: 06.10.2021
(51) International Patent Classification (IPC): 
F25B 43/00(2006.01)
F25B 31/00(2006.01)
 F25B 1/00(2006.01)
F25B 49/02(2006.01)
(52) Cooperative Patent Classification (CPC):
F25B 13/00; F25B 41/385; F25B 41/39; F25B 49/02; F25B 2313/003; F25B 31/008; F25B 2400/0415; F25B 2400/0411; F25B 2500/31; F25B 2700/2106; F25B 2700/21152; F25B 2600/2519; F25B 2600/2513
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 06.10.2020 JP 2020169141

(62) Application number of the earlier application in accordance with Art. 76 EPC:
21877657.3 / 4177545

(71) Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
Tokyo 100-8332 (JP)

(72) Inventor:
  • TERAOKA, Masahiro
    Tokyo 100-8332 (JP)

(74) Representative: Cabinet Beau de Loménie 
158, rue de l'Université
75340 Paris Cedex 07
75340 Paris Cedex 07 (FR)

   


(54) HEAT SOURCE UNIT AND CONTROL METHOD THEREFOR


(57) A heat source device includes: a compressor (3) that compresses a refrigerant; a heat exchanger (5) configured to perform heat exchange between a refrigerant and a heat medium; an air heat exchanger (9) that performs heat exchange between a refrigerant and air; a liquid bypass pipe (20) to guide a liquid refrigerant to an intake side of the compressor; a first and a second expansion valves (6,8); and a receiver (7) to store a refrigerant between the first and the second expansion valves. The device further comprises a selector valve (4) to selectively guide the refrigerant during heating or cooling; a parallel refrigerant pipe (30) provided with a third expansion valve (32); and a control unit controlling the expansion valves..







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