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请教各位:19.8中“如果温升大约为1K(1℃)/min,则该实验就完成了。”请问,其中的温升指的是谁的温升?其中的试验指的是什么试验?
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' N. L9 |: ?9 u' ?% @: E3 ?19.8 All appliances provided with supplementary heaters are subjected to the following test
- B6 ~3 A0 X/ a. D9 h' [3 @' C( qunder the conditions specified in Clause 11:
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After the airflow conditions specified are established, the indoor airflow is restricted to such
- B6 s% l+ r" `, z, e) M' v& h3 Yan extent that the temperature of the air in the outlet, measured by means of the% M: n, R; r8 V
thermocouple grid (see 11.3), is 3 K below the temperature obtained after a temperature
. c, v) Q# X; Y6 _3 Glimiting control, a motor protective device, a pressure switch or similar device operates for
# u/ b `) ]! Xthe first time as a result of slowly restricting the free area of the inlet. i3 {. O/ h* @: W5 H
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This is achieved if the temperature rise is approximately 1 K per min.9 Q8 o1 V7 s: M. `" x0 ~7 f9 ^
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It is necessary to restrict the free area of the inlet until the first of the protective devices8 Y" w% c8 O: m# O; V. Q
operates and then operation is resumed with sufficient restriction so that the temperature of
1 m' w- l' |, |& c \4 D$ q+ Fthe discharge air is 3 K below the temperature at the moment of cut-off.1 ]- d5 G h# @
2 ?- o7 L7 m1 t- kAppliances are operated at rated voltage or at the upper limit of the rated voltage range.8 Y: W. C6 R: U. f% b" w5 F# y
NOTE 101 To facilitate this test, the protective device which has operated may be short-circuited once the temperature at which it operates has been determined. |
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