标题: 请教对60335-2-54章节22.7的理解 [打印本页] 作者: kuiyin01 时间: 2010-5-10 17:01 标题: 请教对60335-2-54章节22.7的理解 如题请教：一般的steam cleaner (非压力型)是否也需要 pressure-limiting protective device ？ 0 R6 Y7 S* ^9 g看22.7的要求好像是这个意思。 # C: e2 y q& {. U6 E; M( cThe steam outlet of instantaneous steam cleaners is sealed and the pressure in the water 1 f G$ D# t% w. t9 d# Qcontainer is raised hydraulically until the pressure-limiting protective device operates. The1 A5 G- a8 ?% W5 y4 M3 P
pressure shall not exceed three times the pressure measured during the test of Clause 11.. P/ {* L: b. k$ B# O! C! K
The outlet of the protective device is then sealed and the pressure is further raised to twice; [5 B! V" C. u8 [4 M9 U
the previous value. The pressure is maintained for a period of 60 s. There shall be no leakage 3 Q& i! b, ]4 H( Xfrom the container." u0 s1 @0 k, o$ K- M8 O/ G$ z
还有一个疑问22.7 Replacement: $ H: s$ B5 b( ~3 l. N2 m" d5 p1 MPressurised appliances shall incorporate adequate safeguards against the risk of excessive* g5 p. {6 U+ ]5 B4 E2 ]
pressure.这节好像是对Pressurised appliances的测试要求，怎么把 instantaneous steam cleaners 也搞进去了？ - n! i( @9 F: n) v& ^) l& Q9 y9 X$ w9 ?2 R% \
NOTE 101 An instantaneous steam cleaner is an appliance in which small quantities of water are pumped from5 H- l4 p! p& G
the water container, the steam being produced when the water contacts the heated surface of the steam chamber.4 K4 l% e! J6 A4 Y, I, C% W1 r
The water container and the steam chamber are at atmospheric pressure.