| 摘要 |
<p>A test kit (10, 10', 110, 110', 310) for detecting acids in refrigerant lubricating oils includes a transparent tube (12, 12', 112, 112') which may be flexible and is selectively sealed at both ends (12a, 12b, 112a, 112b) by end caps (18a, 18b, 18a', 18b', 119, 119' 120) and within which are filters or test pieces (13a, 13b, 13a', 13b', 118). A contact nose (13a-1, 118d) is configured to operate a trigger pin (24, 124) of a Schrader valve (22, 122) to introduce a spray of refrigerant and its entrained lubricating oil from a refrigerant equipment loop into the test kit. Refrigerant gas escapes via exit-end (12b, 112b) leaving behind within the test kit a residue of lubricant oil. A liquid pH indicator (16, 16a, 116, 116a, 316a, 316b) is introduced into contact with lubricating oil residue within the tube either by crushing an ampoule (14, 114, 314a, 314b) by compressing the flexible tube (12, 12', 112, 112'), or via a dispenser (26, 126), to form a pool (17) of liquid reactants in which any color change may be observed.</p> |
