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22.7 Replacement:8 |# o8 E1 G* u
Appliances having a steam bath function shall incorporate adequate safeguards against the
# t0 q+ X$ b; X( {; }9 drisk of excessive pressure.: j @! U& Y4 G4 c9 A
: Z: @7 j0 `. t0 h, Y. aIf jets of steam or hot water are emitted through protective devices, the electrical insulation
& I0 O' {) F! Zshall not be affected or the user exposed to a hazard.; X8 |6 U! V, H' ~3 e4 ?
! i4 x o" E- Y+ t' [6 H( {Compliance is checked by inspection and by the following test.3 e8 k5 j. h- y# g& S5 `9 G; r! I; x
?7 b2 Y5 Q) _+ M9 V) T/ W/ z) L' c
For non-pressurized boilers, the water shall be supplied at a pressure not exceeding 150 kPa.# U* V% A" H, v' u1 [* V% e( y
% p H, d2 a; u
For pressurized boilers, the maximum pressure occurring during the test of Clause 11 with the
6 q6 A# z1 o% d2 K& xboiler filled but without steam emission is measured. All pressure-regulating devices' U+ F3 a# d* Z ~- o1 g9 R
that operated during the test are rendered inoperative and the pressure measured again. The( L) V( B" Z/ L; |7 p& ^
pressure shall not increase by more than 200 kPa.7 h2 l: r" Z' k& @& m
" ]4 S. l' K3 o' H
Any pressure-limiting protective device is then rendered inoperative and the pressure in
0 @% `1 ~$ ?, x, p# b8 K9 }the boiler is raised hydraulically to five times the pressure measured originally or twice the
# l6 Q- G5 _% {pressure measured with the pressure-regulating device operating during the test of Clause 11
# }" ^. l/ M/ N( s( b# prendered inoperative, whichever is higher. There shall be no leakage from the boiler.
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. z9 x2 m- d1 {8 h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?
2 r. N+ _1 b7 `' F什么叫做是non-pressurized boilers; pressurized boilers 它们的定义是什么啊?
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万分感激! |
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