Temperature sensing tube for expansion valve

Abstract

The invention provides a temperature sensing tube for an expansion valve in which a hunting can be prevented by slowing of a temperature reaction rate of the expansion valve. In a temperature sensing tube (1), a ceramic sintered member serving as a heat transfer delay member (3) is fixed so as not to directly come into contact with a tubular member (2) by fixing springs (4, 4) provided at both end portions (13, 13). In comparison with the case that the ceramic sintered member directly comes into contact with the tubular member (2), a heat transfer from the tubular member (2) to the ceramic sintered member becomes slow. Further, since the ceramic sintered member is fixed by the fixing springs (4, 4) in a state that it is spaced from the tubular member (2), and does not directly come into contact with the tubular member (2) at whatever position around it, a temperature is not transferred from a mated piping directly via the tubular member, whichever outer surface of the temperature sensing tube 1 comes into contact in attachment of the temperature sensing tube 1 to the piping, and a reaction rate with respect to a temperature rise of the expansion valve can be made slow.

Description

technical field [0001] The present invention relates to a temperature-sensing cylinder for an expansion valve, which is installed on piping such as an evaporator in order to control the flow rate of refrigerant passing through the expansion valve, detects the temperature of the refrigerant at the outlet of the evaporator, and controls expansion based on the detected temperature valve flow. Background technique [0002] In the past, a refrigeration system was generally formed by connecting a condenser, an evaporator, and a compressor through refrigerant piping, and a temperature expansion valve was arranged between the condenser and the evaporator. The temperature expansion valve also has the function of decompressing the refrigerant supplied to the evaporator and making it easy to evaporate the refrigerant in the evaporator; it also has the function of controlling the flow rate of the refrigerant flowing into the evaporator. In the temperature expansion valve, feedback cont...

AI Technical Summary

Problems solved by technology

[0007] The conventional temperature-sensitive cylinder in which the ceramic sintered body is placed inside is installed, for example, in a state of being attached to the piping of the evaporator. Due to the installation posture of the temperature sensing cylinder relative to the piping, heat may be easily transferred from the piping to the ceramic sintered body through the temperature sensing cylinder container, thereby excessively accelerating the reaction speed to temperature and causing oscillation

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