Turbo Refrigerator

JP7789477B2Active Publication Date: 2025-12-22MITSUBISHI HEAVY IND THERMAL SYST
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Patent Information

Application Number
JP2020067563
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2020-04-03
Publication Date
2025-12-22
Estimated Expiration
2040-04-03

AI Technical Summary

Technical Problem

Existing technologies do not effectively address the detection of leaks in refrigerants classified as mildly flammable (A2L) such as R1234ze(E) and R1234yf, which are increasingly used in refrigerators due to their low Global Warming Potential (GWP), and fail to provide a quick and efficient method to prevent large-scale leakage.

Method used

A turbo chiller design with a refrigeration cycle using mildly flammable refrigerants, where the refrigerant flow is concentrated near a designated location, and a sensor unit is installed below this point to detect leaks efficiently, utilizing the higher specific gravity of refrigerants to guide them to the sensor.

Benefits of technology

Enables quick and efficient detection of refrigerant leaks, reducing economic losses by preventing large-scale leakage and facilitating prompt action with easy installation of the sensor unit in a narrow space.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a turbo freezing machine which can determine leakage of a slightly flammable refrigerant early and efficiently.SOLUTION: A turbo freezing machine includes: a refrigeration cycle in which a compressor 10, a condenser 12, an expander, and an evaporator 20 are connected by a refrigerant pipe and which is filled with a slightly flammable refrigerant; and a refrigerant detector having a sensor part 72 for detecting a refrigerant, and a body part which determines leakage of the refrigerant based on information from the sensor part 72. Auxiliary machines 30, 32 in which the refrigerant circulates and which are attached to the compressor 10 and joint parts of the refrigerant pipe are consolidated at a predetermined portion. The sensor part 72 is installed below the predetermined portion.SELECTED DRAWING: Figure 4
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Citation Information

Patent Citations

  • Freezer

    JP1998281573A

  • Refrigerating device

    JP2009270797A

  • Controller and method for providing computerized generation and use of three-dimensional surge map for control of chiller

    JP2011122812A

  • Turbo chiller

    JP2013113555A

  • Control system

    US20090024257A1