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22.7 Replacement:4 b7 p' u4 W7 D) |. F6 s6 d$ O
Appliances having a steam bath function shall incorporate adequate safeguards against the
/ ?4 t- k3 H5 w R0 _risk of excessive pressure.
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If jets of steam or hot water are emitted through protective devices, the electrical insulation
0 z+ {* r. f, u* i* h5 \: gshall not be affected or the user exposed to a hazard.- |; L# m0 z" t/ X4 }
) @$ v$ x; }- S) u" ~Compliance is checked by inspection and by the following test.
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$ `& t: Y' O! H' RFor non-pressurized boilers, the water shall be supplied at a pressure not exceeding 150 kPa.
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1 A* y! `& r! |For pressurized boilers, the maximum pressure occurring during the test of Clause 11 with the$ z8 v/ O9 f" j
boiler filled but without steam emission is measured. All pressure-regulating devices/ f# {7 A( l! @5 q4 i7 ~
that operated during the test are rendered inoperative and the pressure measured again. The I% \3 P- e- P, u8 M* {$ R( f( D( P
pressure shall not increase by more than 200 kPa.
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Any pressure-limiting protective device is then rendered inoperative and the pressure in
4 w0 e$ f+ M' G0 ]- f7 M" Mthe boiler is raised hydraulically to five times the pressure measured originally or twice the4 K3 C! K1 g4 B4 x
pressure measured with the pressure-regulating device operating during the test of Clause 118 F9 h# N% o1 _+ `* O# H6 }
rendered inoperative, whichever is higher. There shall be no leakage from the boiler.( W9 w9 f* B1 Y8 o
+ P; D& _$ Y2 ~- \; n7 F8 s请教有哪位大侠做过EN60335-2-105的22.7这个章节的测试?能否帮讲解一下这个测试怎么做,如何去理解这个条款?; C$ q" h; x- K" O
什么叫做是non-pressurized boilers; pressurized boilers 它们的定义是什么啊?* [8 q- d5 Q' W: N4 m
4 O; x9 _ U+ Y( T% I9 G万分感激! |
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