Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/149642
Kind Code:
A1
Abstract:
Provided is a refrigeration cycle device of which a decrease in performance due to an increase in pressure loss is suppressed, and by which a decrease in the drive performance of the refrigeration cycle device as a whole is prevented. The refrigeration cycle device 100 according to the present invention is provided with a refrigeration cycle which includes an evaporator 4 and through which a refrigerant circulates, wherein the refrigerant flows through the evaporator 4 at an average flow velocity u such that a function Tsat_u(u) is less than Tsat_u_min + 0.3(°C): where Q(W) is the amount of heat exchanged by the evaporator 4; d(m) is the refrigerant flow passageway diameter of the evaporator 4; Ai(m2) is the heating surface area inside the pipe of the evaporator 4; k(W/mK) is the average heat conductivity of the refrigerant; ρ(kg/m3) is the average density of the refrigerant; μ(Pa⋅s) is the average viscosity of the refrigerant; Pr is the Prandtle number of the refrigerant; u(m/s) is the average flow velocity of the refrigerant flowing through the evaporator 4; Tsat(u) is a function which is determined by the type of the refrigerant and which is used for deriving a refrigerant saturation temperature difference between an entry and an exit of the evaporator 4 from the average flow velocity u of the refrigerant flowing through the evaporator; and Tsat_u_min is the minimum value of the function Tsat_u(u) expressed by the expression (1).
Inventors:
ISHIKAWA TOMOTAKA (JP)
Application Number:
PCT/JP2016/056199
Publication Date:
September 08, 2017
Filing Date:
March 01, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00
Domestic Patent References:
| WO2009154149A1 | 2009-12-23 |
Foreign References:
| JP2012237543A | 2012-12-06 | |||
| JP2002323272A | 2002-11-08 | |||
| JP2011122819A | 2011-06-23 | |||
| JPH09133433A | 1997-05-20 | |||
| JPH06272998A | 1994-09-27 | |||
| JPH08145490A | 1996-06-07 | |||
| JPH09105560A | 1997-04-22 |
Attorney, Agent or Firm:
INABA, Tadahiko et al. (JP)
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