Title:
HEAT PUMP DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/243022
Kind Code:
A1
Abstract:
This heat pump device performs a heating operation for heating supplied water and a cooling operation for cooling the supplied water, and comprises a compressor, a flow passage switching device, an air heat exchanger, a pressure reducing device, a water heat exchanger, and a refrigerant pipeline forming a refrigerant circuit, wherein: if an inner diameter of the refrigerant pipeline at an inlet portion of the pressure reducing device is defined as a pipeline inner diameter x (mm), and a formula that represents an average value of a refrigerant flow velocity of the refrigerant, in a two-phase state of liquid and gas, at the inlet portion of the pressure reducing device, and that indicates a boundary at which the refrigerant does not exhibit slug flow is defined as a refrigerant flow velocity threshold y (m/s), the refrigerant flow velocity threshold y (m/s) is predetermined in accordance with a dryness, as follows; with a dryness of 0.2, y=3x-7.2774, with a dryness of 0.3, y=1.8639x-0.5495, with a dryness of 0.4, y=2.9906x-6.6909, with a dryness of 0.5, y=2.8725x-5.2025, with a dryness of 0.7, y=0.986x+1. 4019, and with a dryness of 0.8, y=25.391x-95.316; and the refrigerant flows through the refrigerant circuit in such a way that a refrigerant flow velocity Y (m/s), which is the velocity of the refrigerant flowing through the inlet portion of the pressure reducing device, is at least equal to the refrigerant flow velocity threshold y (m/s) corresponding to the dryness.
Inventors:
KAWANO KOSUKE (JP)
KADOWAKI KIMITAKA (JP)
KADOWAKI KIMITAKA (JP)
Application Number:
PCT/JP2022/024049
Publication Date:
December 21, 2023
Filing Date:
June 16, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00
Domestic Patent References:
| WO2018047332A1 | 2018-03-15 | |||
| WO2022079763A1 | 2022-04-21 | |||
| WO2014155545A1 | 2014-10-02 | |||
| WO2020240858A1 | 2020-12-03 |
Foreign References:
| JPH09292166A | 1997-11-11 | |||
| JP2013185757A | 2013-09-19 | |||
| JP2001116396A | 2001-04-27 |
Other References:
ENOKI KOJI, MORI HIDEO, MIYATA KAZUSHI, HAMAMOTO YOSHINORI, : "Flow Patterns of the Vapor-liquid Two-phase Flow in Small Tubes", TRANS. OF THE JSRAE, vol. 30, no. 2, 1 January 2013 (2013-01-01), pages 155 - 167, XP093117914
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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