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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?, ]/ Q0 U# z# \& V# i
* h/ J, u# r! ?% L/ D( A19.8 All appliances provided with supplementary heaters are subjected to the following test
5 w6 e; }. ]3 X4 E+ i" {; @# Uunder the conditions specified in Clause 11:
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After the airflow conditions specified are established, the indoor airflow is restricted to such, ]( ?( h# J# p3 f( v
an extent that the temperature of the air in the outlet, measured by means of the+ @, d- M& }! E9 h P. w
thermocouple grid (see 11.3), is 3 K below the temperature obtained after a temperature& U1 T* |% Q' C3 _( }; o2 r) H
limiting control, a motor protective device, a pressure switch or similar device operates for- {6 e7 w, V/ H
the first time as a result of slowly restricting the free area of the inlet./ t \1 c& T( n' f
# l u5 g3 B$ w: U( M2 K I/ _' cThis is achieved if the temperature rise is approximately 1 K per min.
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It is necessary to restrict the free area of the inlet until the first of the protective devices2 c+ d k7 e0 q
operates and then operation is resumed with sufficient restriction so that the temperature of
/ M& F# u& R1 T& x" t N# pthe discharge air is 3 K below the temperature at the moment of cut-off.1 y' f ~; J9 d6 N4 R
% V/ R. f0 j2 P1 fAppliances are operated at rated voltage or at the upper limit of the rated voltage range.
; h+ t3 s Q- f/ i( ]2 [, R3 INOTE 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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