Kettle The invention relates to a kettle.
cttles ate relatively noisy kitiicn apnliarces As a kettle has tie mudug pa'ts oi the inteun the nain sou'c'e cfnc'ise ic ue to cavitation it' the vatcr as r is boded by the heetng &cncrt Ovet receit yeats, the dernard for shorter aeat;rg rtmes n kerties and jugs ass Ted to an increase in the powr of a typical heater from around 2,2KW to around 3.2KW.
This is particularly so wth the more widespread adoption of underfloor sheathed l-eatv g elements and thick fUn heatnrs This po'ci cc ease has been achieved withn'tt ineieasmg the size of the heatLi so na te apohance does rot need c be made i5rgcr to accommodate a targeT heater. Thus the incrcne hi heating power has led to an increase in the power density applied to the hearer surface. This has, in turn, waddled the process of heat trariafer between hit heater and vatcr By Way of expisnattor, at low power dersines the dtfb "nec n teirperature betweer lire heater surlace and he \\ater is quite low ypica ly 10 deg CI and beat tra',sfei is chieved by eo'wectsoa However, at tee powei densi.ies typically seen in high power water 10 1'catc1s (7980\ trn2\ th.,. difference in temperature betweer th water heater surface and the bulk liquid is increased significantly, and at a micro level results in the fonnation of bubbles of air or steam. This increased temperature diffetenec modifies tne process by whch heat transfer occuts finn a convecwc heat transfer process to a nucleate boiling process. These power density values give rise to bubble generation throeghe,it the heat n cycle I is the fhrnHuon of burn'lcs at the beater am face the ieleas & those bubbles lom the heater sw "ace and the subsequent collapse of the hubbies in the buk hqv,d that are th pnuc'pa cduscA of flOise generation during the heating of water. Typically, noise levels can reach 70dB or higher GB2386532 discloses a heating element for a kettle surface is provided with adjacent regions, which have different surface tension properties. The surface is provided with a two,hase o rut -phase coat ig, campnsu'g narteles that protide nceation siLs for bubbles ad a matrix sri ig to d srupt the growth of tb bt bbles However this coanng ha proven to be nrjLabL and is affected b calcium build ip Additionally, although this approach resulted in a significant noise reduction, further no se edvct on hs proved eluivi to manufaettrLrs i tiis field W0201 ifi29386 d'.rJoses a seal rig arrargnncnt:oi kettle The seeIng co'nponuit has aranged o' the extrot thuec a clasp, the co'th'acing belt, oz the metal twist to put the heating element and the large body in a sealed connection, Ths arrangement will have short life and is prone W failure, Phe present invert o" seeks to proirde r kettle tI at is c't icter in use tha' kctles Writ aie currcntiy on the maikc According to the invention there is provided a kettle having a body, an clement assembly and a base, wherein the kettle body comprises a flange on an interior surface acaptec to co-opeire sitb a sal on the element assembly to toni a water-tight IOWL surface to the kettle body, wherein the kettle is farther provided with a retaining at urtur' en ip' tsrg that and secona bracicets adapted to cc' opetate with tie flang o retain the element assembly in position, Preferably the retaining structure further comprises a clip adapted to prevent rotation in the insta!,ec rositon of the hacket park Prefeiab y the kettle oody is made of metal, Prefriably, the flange is provided with cut outs adapted to co-operate with cut outs on the br4ckcts he st'ucture u the kettie is bchcvcd tc' absorb the 1brators caused b the eolapsmg of the bubbles rasult rig ii a a'gmficrit noise reduction The nOi of the kettle also has a lower frequency than the prior art kettles, which is less perceptible to the. ear.
An oxen' &a y et bothrncnt & the rnvennor w II no i be dcseribed in grcati dct4i I with reference to the drawings in which: Fig. I shows an exploded viCw of a prior art kettle Fig 2 shows ar exp'oded view of the kettLe accoiding to he iventio Fig. 3 shows a retaining structure Fig 4 showc a compaiatre graph Figuie I -,how an exploded view of a p or an kettle cociprismg a nam body nswnbty 1, a press. i.e se2t assembly nit 2 a C chp 3 and a suobaso 4 The C c'ip I and sub base I ma, be a sigL wiit Tho p1csuic seal assmh1y inn 2 uu'phscs a planar e1emcn 5, wrl a. roumfnentia seas 6 as e as the clcecioal conrct ons 1 to enable elecuicity to be supplied to the element 5. The kettle is assembled by inserting the pressure seal assembly unit into the jug body so that the planar clement 5 forms the base to the water tank of the kettle with the circumferential seal ensuring that tb seal is at.rr ttgli Tho c-dip is 4itted into place to hod the ckment suo-aswmbly n place Tb'-eeroit pioteeter and othn' i-itcnal parts a c nsscml,,lec i,d thei1 tji0 vib I ase 4 is 9tted Additonal SC OWS ca now be frte4 tni.ugh the sub-base.nd tto r'c assei"bled cvntio Th assemby of the ott tequires the use of a specific assrrnbly,jw to er-sure that the parts ate not misaigrec Oree assc nblcd, do kettle is typically pressure tested by applying a 0.3 bar pressure to the kettle to detect leaks The kettle is thei rypica1y boil estec with ne'-and then al owed c cool for 4 hours to chock for any signs of leakage, figute 2 shows at-exploded \icw ot hie kettle of the mvention "Lie kctte eomprses a train ket Ic oo4y 10 a piessuic sea assembly unit 11, which s of ibsantially the ame ccstgn as ii igure 1, a ietanmg su-netire 12 anci a base 13 The trai kettle body lOis provided wh an interior iange or potuidirj wa 14 whch s adapted to receive the pressure seal assembly unit 11 so that the clement seal provides the seal on rho fange wall he sni face of *c flange apposite to the kettle mtenr is pray dod with a least one nd efetabIy a olurrilty of "1ips I S 4dapled to eagc v,th the retaining structure in the assembled condition. The metal clips are cut out from the surface o" the flange matei ia1 I 1ic flange i also prov dcd with ciew notes 17 to receive a plurality of SCreWS 16. The screws are an optional feature.
] He rcamlpg a'n'cLure romprlses Crs 20 and second 21 ieamrng hia ket, csc i having a subsant ally seni-c recta' fon such rhat at one cid in tic Installed posftioi there is a snail space between ie re cot ye opposco endc A the othor tnds, the brackets abut the narri Libe which Is part of' the cornol Each of the brackets 20 21 is provided with screw through holes adapted to co-operate with the screw holes 17 at ti-c fin-ge Each biacket 20, 21 s pro;ideo wtu cut o't sxtions 23 adapted to co-operate with the clips 15, Figure 3 shows the retaining structure in greater detail. Each bracket has at one end opposing the correspondung of the other biacket an uptandicg trapezoida membei 24 Tnc fIrst bracket 20 is ptov4ded witi a cnout 25 adjacent to the Lpstandtng menibe 24 or thc oroximal sid A rc'tan ng brackc cup 26 s adaptec to engage with the npstanclq'g no nbers a d is provided wtb a wedge 27 ntermcdwtr tc its c ds adapted o fit in the soace betwccn the wo brackets A spi ng member 28 on the Cm 26 is adapted to engage in tie cutoct 25 The clip 76 fuacinns as an an i-i othtion device aim therefore prevents the brackets 20, 21 from rotating.
The clips 15 in the kettle body keep the element retaining brackets 20 21 in position anr1 St ppm the mad nf tc elerient ard water in the kettle It is poss ble to nspect that the retalnrng orackets sic suppot ted by all the metal chps n the assenhy prortis The retaining biacke s also have the extra elm 26 which books uito the kettle bod o spread the lead further, It is optionally possible change the element, first the base is removed, then the bracket elm 26 The bracket parts 20, 21 re then tree to rotate ard can be rotated out from underneath the clips 15 to enable them to be removed. The steam tube can then be remo-ced, foliowetl by the &eirent assenwly The n:w element can then be maci ted an after ensuru'g that the ieai is watet -tight, the ctairnng trackets can be e-mstalleo and held in position by the clip 26, Fgre $ shcws a cnmparison of kcittte n&sc timt Thrfnr kStk& flm keuk ct the 1nvenumi p frboikd C\*1K 3 R'cttk!IC1 ha t camc 2 7 kV' cmc t a the kt.uk CVKt and h ca 1w rramm two kctth hrio 23kW ck?<ut Ttw protcv; a'; toHew I) Eadi Ltt!c n Thcd wrh oi watc it 5 C to mamunil ?ohiric ni' 2 The Sound moter*i piacSa ditaaee 0160cm t?mn the kSJe fl Start th c4 frnn coW to kuled Ac ccn.. he scc1 from.th grnph, the ktLkt CWXU c$knurt hc of Md13, OcSçnW ii g a hsihr wa ta eLment which WUJIJ C cpxdd 0 C whcrc% tl'c fr'uet perk noke fo tie otha kttflc't i' dfl ts heht'vu Via ia 5tiitettt bseibs.he ib'at om eoi.cc by thc u1psi. s1 th> ubht m thc CkIm