SI9600059A2

SI9600059A2 - Heating chamber for stoves

Info

Publication number: SI9600059A2
Application number: SI9600059A
Authority: SI
Inventors: Boris Jurkosek; Boris Jesenicnik; Peter Krepel
Original assignee: Gorenje Gospodinjski Aparati D
Priority date: 1996-02-22
Filing date: 1996-02-22
Publication date: 1997-08-31

Abstract

Izum se nanaša na grelno komoro pri štedilniku, obsegajočo v bistvu pravokoten plašč (1) in z njim togo povezano skončno steno (2). V prečnem prerezu v bistvu pravokoten plašč (1) je zasnovan iz niza pločevinastih elementov (3,4,5,6,5’,6’,7,8,9,10,11,12) različne debeline, ki so medsebojno v vzdolžni smeri togo povezani, tako da tvorijo v bistvu paralelepipedno grelno komoro.The invention relates to a heating chamber at a stove, comprising substantially a rectangular jacket (1) and with it rigidly connected end wall (2). In cross section essentially a rectangular sheath (1) is made of string sheet metal elements (3,4,5,6,5 ', 6', 7,8,9,10,11,12) different thicknesses that are in a longitudinal direction rigidly connected so that they form essentially parallelepiped heating chamber.

Description

GORENJE Gospodinjski aparati, d.o.o.GORENJE Household appliances, d.o.o.

Grelna komora pri štedilnikuCooker at the stove

Izum se nanaša na grelno komoro pri štedilniku, obsegajočo v bistvu pravokoten plašč in z njim togo povezano skončno steno. Predmet izuma je začasno uvrščen v razred A 21 B IPC*.The invention relates to a heating chamber at a stove comprising a substantially rectangular sheath and a rigidly connected end wall. The subject of the invention is provisionally classified in class A 21 B IPC *.

Grelna komora pri štedilniku zgoraj navedene vrste je v splošnem znana in obsega iz enega kosa pločevine zasnovan plašč, ki je spojen zgolj na enem mestu. Ker je debelina pločevine enaka na vseh mestih plašča, se je izkazalo, da uporabljeni material glede napetosti, ki se pojavljajo v njem, ni optimalno izkoriščen. Debelina pločevine kot tudi kakovost le-te sta tako izbrani glede na največjo obremenitev, pri čemer se izkaže, daje plašč grelne komore predimenzioniran na mestih, kjer so obremenitve sorazmerno nizke.The cooking chamber of the cooker of the above type is generally known and comprises a sheath formed from a single sheet of metal, which is joined in one place only. Since the thickness of the sheet is the same at all places of the sheath, it has been shown that the material used does not optimally utilize the stresses that occur therein. The thickness of the sheet as well as the quality of the sheet are thus chosen according to the maximum load, whereby the sheath of the heating chamber is shown to be oversized in places where the loads are relatively low.

Ker je znana grelna komora zasnovana iz enega samega kosa pločevine, je potrebno za vsako dimenzijo štedilnika izdelati drugačno grelno komoro. To pomeni, da so potrebne sorazmerno velike zaloge polizdelkov in veliko število orodij za npr. globoki vlek.As the known heating chamber is made of a single piece of sheet metal, it is necessary to create a different heating chamber for each dimension of the cooker. This means that relatively large inventories of semi-finished products and a large number of tools are needed for e.g. deep traction.

Nadalje zahteva izdelava dodatnih izboklin ali vboklin na stenah grelne komore, npr. vodil za rešetko, zahtevna orodja, kar predstavlja sorazmerno visok strošek.It further requires the production of additional protrusions or indentations on the walls of the heating chamber, e.g. grille guides, demanding tools, which is a relatively high cost.

V že izdelanih grelnih komorah ostanejo v preoblikovani pločevini zaostale notranje napetosti. Pri nadaljnji površinski obdelavi, npr. emajliranju, ki poteka pri sorazmerno visoki temperaturi okoli 800°C, se te notranje napetosti sproščajo, kar ima za posledico pokanje emajla, zlasti v vogalnih območjih.In pre-fabricated chambers, residual internal stresses remain in the transformed sheet. In further surface treatment, e.g. enameling, which takes place at a relatively high temperature of about 800 ° C, releases these internal stresses, resulting in cracking of the enamel, especially in the corner areas.

Naloga predloženega izuma je torej izdelati grelno komoro pri štedilniku, pri kateri bodo odpravljene zgoraj navedene pomanjkljivosti.It is therefore an object of the present invention to provide a cooker heater with a cooker which eliminates the above disadvantages.

Zastavljena naloga je po izumu rešena tako, da je plašč paralelepipedne grelne komore zasnovan iz niza vzdolžno intenzivnih pločevinastih elementov različnih debelin, ki so npr. s pomočjo laserja zvarjeni drug z drugim. Tako lahko plašč grelne komore obsega dva podolgovata, v prečnem prerezu v bistvu kot črka C zasnovana in medsebojno v vzdolžni smeri enakomerno razmaknjena profila. Med vsakokratnima nasproti ležečima si krakoma omenjenih profilov je razporejen po en trak, npr. zgornji in spodnji trak, ki je z omenjenima krakoma vzdolžno togo povezan. Pri tem se debelina vsakokratnega traku razlikuje od debeline vsakokratnega profila, prednostno je manjša. Profila oz. trakova sta lahko enake ali tudi različne debeline.The object of the invention is solved by the fact that the casing of the parallelepiped heating chamber is made of a series of longitudinally intense sheet metal elements of different thicknesses, e.g. welded to one another using a laser. Thus, the sheath of the heating chamber may comprise two elongated, substantially cross-sectioned, letter C-shaped and evenly spaced profiles in a longitudinal direction. Between each of the respective arms of said profiles, one strip is arranged, e.g. the upper and lower straps, which are connected rigidly to said arms by the said arms. In this case, the thickness of each strip is different from the thickness of each profile, preferably smaller. Profile or. the strips may be the same or different thicknesses.

Nadalje lahko plašč grelne komore obsega štiri podolgovate, v prečnem prerezu lokaste vogalne elemente, katerih vsak je razporejen v enem vogalu plašča. Vsak krak vsakokratnega elementa je od nasproti ležečega kraka enakomerno odmaknjen po vsej dolžini. Med vsakokratnima nasproti ležečima si krakoma vogalnih elementov je pri tem razporejen po en trak, ki je z omenjenima krakoma vogalnih elemetov vzdolžno togo povezan. Pri tem se debelina vsakokratnega traku razlikuje od debeline vsakokratnega vogalnega elementa, prednostno pa je manjša. Vogalni elementi oz. trakovi so lahko izdelani iz pločevine enake ali pa različne debeline.Further, the sheath of the heating chamber may comprise four elongated, cross-sectioned arched corner elements, each arranged in one corner of the sheath. Each arm of each element is spaced uniformly along its entire length. In each case, opposite to each of the corners of the corner elements, one strip is arranged, which is rigidly connected to said corners of the corner elements. In this case, the thickness of each strip differs from the thickness of each corner element, preferably smaller. Corner elements or. the strips can be made of sheet metal of equal or different thickness.

Nadalje je prednostno, da razmerje debeline pločevin, iz katerih je izdelan plašč grelne komore, prednostno leži med 1:1 in 5:1.It is further preferred that the thickness ratio of the sheets from which the heater chamber sheath is made is preferably between 1: 1 and 5: 1.

Prednostno je tudi, da širina vsakokratnega traku znaša vsaj 10% širine oz. višine paralelepipedne grelne komore.It is also preferred that the width of each strip is at least 10% of the width or width. heights of the parallelepiped heating chamber.

Izum je v nadaljevanju pobliže predstavljen s pomočjo skic izvedbenih primerov, kjer kaže sl. 1 grelno komoro pri štedilniku po izumu v aksonometričnem prikazu, sl. 2 nadaljnji izvedbeni primer grelne komore po izumu pri štedilniku, prav tako v aksonometričnem prikazu.The invention will now be further illustrated by way of drawings of embodiments, where FIG. 1 is an axonometric view of the cooker of the cooker of the invention; FIG. 2 is a further embodiment of a cooker according to the invention in a cooker, also in axonometric view.

Grelna komora pri štedilniku, katera je v splošnem zasnovana kot pravokotni paralelepiped, obsega plašč 1 in skončno steno 2. Plašč 1 je pri tem v prečnem prerezu zasnovan v bistvu kot pravokotnik z zaobljenimi vogali, skončna stena 2 pa je z njim togo povezana, npr. zvarjena.The stove heating chamber, which is generally designed as a rectangular parallelepiped, comprises a sheath 1 and an end wall 2. In this case, the sheath 1 is essentially designed as a rectangle with rounded corners, and the end wall 2 is rigidly connected thereto, e.g. . welded.

Prvi izvedbeni primer plašča 1 grelne komore po izumu je zasnovan iz dveh podolgovatih, v prečnem prerezu v bistvu kot črka C zasnovanih in medsebojno v vzdolžni smeri enakomerno razmaknjenih profilov 3, 4, pri čemer so kraki vsakokratnega profila obrnjeni drug proti drugemu. Med vsakokratnima nasproti ležečima si krakoma profilov 3, 4, izdelanih iz pločevine debeline δ,, je razporejen zgornji trak 5 oz. spodnji trak 6, izdelan iz pločevine debeline δ₂, ki je z omenjenima krakoma vzdolžno togo povezan, npr. zvarjen s pomočjo laserja.The first embodiment of the heater chamber jacket 1 according to the invention is made of two elongated, substantially cross-sectional letters C-shaped and mutually spaced profiles 3, 4 with each other, with the arms of each profile facing each other. Between the two opposite arms of the profiles 3, 4 made of sheet metal thickness δ ,, the upper band 5 and 5 are arranged. lower bar 6 made of sheet metal δ ₂ , which is rigidly connected to said arms longitudinally, e.g. welded with a laser.

Drugi izvedbeni primer plašča 1 grelne komore po izumu obsega štiri podolgovate, v prečnem prerezu lokaste vogalne elemente 7, 9, 10, 12, katerih vsak je razporejen v enem vogalu plašča 1. Vogalni elementi so pri tem izdelani iz pločevine z debelino δ p Vsak krak vsakokratnega elementa 7, 9, 10, 12 je od nasproti ležečega kraka enakomerno odmaknjen po vsej dolžini, pri čemer je med vsakokratnima nasproti ležečima si krakoma vogalnih elementov 7, 9, 10, 12 razporejen zgornji trak 5’, spodnji trak 6’ in bočna trakova 8, 11, ki so z omenjenimi kraki vogalnih elemetov vzdolžno togo povezani, npr. zvarjeni s pomočjo laserja. Omenjeni trakovi so pri tem izdelani iz pločevine debeline δ₂.The second embodiment of the sheath 1 of the heating chamber according to the invention comprises four elongated, cross-sectioned, angular corner elements 7, 9, 10, 12, each arranged in one corner of the sheath 1. The corner elements are thus made of sheet thickness δ p Each the arm of the respective members 7, 9, 10, 12 is uniformly spaced from the opposite arm along the entire length, with the upper strips 5 ', the lower strap 6' and the ribbons 7, 9, 10, 12 lying opposite each other. lateral strips 8, 11, which are connected rigidly to said arms of said corner elements, e.g. laser-welded. These strips are made of sheet metal δ ₂ .

Dolžine profilov 3, 4 in trakov 5, 6 ter vogalnih elementov 7, 9, 10, 12 in trakov 5’, 6’, 8, 11 so seveda enake, medtem ko je širina trakov 5, 6, 5’, 6’, 8, 11 lahko različna. Kot prednostno se je izkazalo, da mora širina vsakokratnega traku znašati vsaj 10% širine oz. višine paralelepipedne grelne komore. Razmerje debelin δμ δ₂ pločevin, iz katerih je izdelan plašč 1 grelne komore, prednostno leži med 1:1 in 5:1.The lengths of the profiles 3, 4 and the strips 5, 6 and the corner elements 7, 9, 10, 12 and the strips 5 ', 6', 8, 11 are of course the same, while the width of the strips is 5, 6, 5 ', 6'. 8, 11 can be different. As a matter of priority, the width of each strip must be at least 10% of the width or width. heights of the parallelepiped heating chamber. The thickness ratio δμ δ _{2 of the} sheets from which the sheath 1 of the heating chamber is made is preferably between 1: 1 and 5: 1.

GORENJE Gospodinjski aparati, d.o.o.GORENJE Household appliances, d.o.o.

Claims

Patent claims

The stove heating chamber comprising a substantially rectangular sheath and a rigidly connected end wall thereof, characterized in that, in cross section, it is essentially a rectangular sheath (1) formed of a series of sheet metal elements (3,4, 5, 6, 5 ' , 6 ', 7, 8, 9, 10, 11, 12) different thicknesses, which are rigidly interconnected in a longitudinal direction, forming essentially a parallelepiped heating chamber.

Cooker heater according to claim 1, characterized in that the sheath (1) of the heater chamber is made of two elongated cross-sections substantially like the letter C and of uniformly spaced profiles (3, 4) in the longitudinal direction, wherein one strip (5, 6), which is rigidly connected to said arms, is arranged between the respective arms of the profiles (3, 4) in each case.

The stove heating chamber according to claim 1, characterized in that the sheath (1) comprises four elongated, cross-sectioned, angular corner elements (7, 9, 10, 12), each arranged in one corner of the sheath (1), at whereby each arm of the respective element (7, 9, 10, 12) is uniformly spaced along the opposing limb along the entire length, with one strip ( 5 ', 6', 8, 11), which is connected rigidly to said arms of each corner element.

The cooking chamber of the cooker according to claims 1 to 3, characterized in that the profiles (3, 4) or. corner elements (7, 9, 10, 12) made of sheet metal with thickness d _r .

Cooker heater according to claims 1 to 3, characterized in that the strips (5, 6, 5 ', 6', 8, 11) are made of sheet metal with a thickness of δ ₂ .

The cooker heater chamber according to claims 1 to 5, characterized in that the thickness ratio δ ₂ : δ _{2 of the} sheets from which the sheath (1) of the heater chamber is made is preferably between 1: 1 and 5: 1.

7.

Cooker heater according to claims 1 to 5, characterized in that the width of the respective strip (5, 6, 5 ', 6', 8, 11) is preferably at least 10% of the width or width. heights of the parallelepiped heating chamber.

Cooker heater according to any one of the preceding claims, characterized in that the elements of the jacket (1) are rigidly interconnected, preferably laser welded.