SE505561C2

SE505561C2 - Freezer with shelves arranged above each other and with means for defrosting its cooling element

Info

Publication number: SE505561C2
Application number: SE9203595A
Authority: SE
Inventors: Karl Gunnar Lilja; Bertil Iverlund; Lars-Aake Wickman
Original assignee: Electrolux Ab
Priority date: 1992-11-30
Filing date: 1992-11-30
Publication date: 1997-09-15
Also published as: SE9203595L; EP0600845A2; EP0600845A3; SE9203595D0

Abstract

At a freezer display cabinet (10), where a cooling element (22) cools the air for a vertical air curtain (26), which in its turn cools goods in the cabinet to freezing temperature (about -18 DEG C), one lets the air also flow through the goods from the rear for further cooling of the goods. At defrosting of the cooling element heated air is circulated through the cooling element (22) and the curtain (26), while the air flow from the rear through the goods is shut off, so that humid defrosting air cannot form frost on the goods here. <IMAGE>

Description

15 20 25 30 35 40 sus 561 g; 2 __ Ett utföringsexempel på en frysdisk enligt uppfinningen beskrivs nedan i anslutning till figuren på den bifogade ritningen. 15 20 25 30 35 40 sus 561 g; An embodiment of a freezer counter according to the invention is described below in connection with the figure in the accompanying drawing.

Med 10 betecknas en frysdisk med utrymmen 12, i vilka varor, som förvaras vid frystemperatur (ca -18%U på hyl- lor 14, är tillgängliga genom en vertikal tillträdes- öppning 16. Utrymmena 12 omges av en kanal 18, i vilken en fläkt 20 och ett kylelement 22 är belägna. Fläkten 20 cirkulerar luft genom kanalen 18 från ett första ställe 24 vid det understa utrymmets 12 nedre främre kant genom kylelementet 22, som kyler luften, till ett andra ställe 25 vid det översta utrymmets 12 övre främre kant, varifrån luften rör sig nedåt framför utrymmena 12 i en luftridå 26, som kyler varorna, till det första stället 24. Varorna kyls även av luft, som kylts av kylelementet 22 och därefter sugs in av en fläkt 28 i en kanal 30 anordnad bakom en bakre vägg 32 hos utrymmena 12, från vilken kanal 30 fläkten 28 bringar luften att strömma genom öppningar 34 i den bakre väggen 32, väsentligen horisontell riktning och därefter förenas med luftridån 26.Denoted by 10 is a freezer counter with spaces 12, in which goods stored at freezing temperature (about -18% U on shelves 14, are accessible through a vertical access opening 16. The spaces 12 are surrounded by a channel 18, in which a fan 20 and a cooling element 22. The fan 20 circulates air through the duct 18 from a first location 24 at the lower leading edge of the lower space 12 through the cooling element 22, which cools the air, to a second location 25 at the upper leading edge of the upper space 12. , from which the air moves downwards in front of the spaces 12 in an air curtain 26, which cools the goods, to the first place 24. The goods are also cooled by air, which is cooled by the cooling element 22 and then sucked in by a fan 28 in a duct 30 arranged behind a rear wall 32 of the spaces 12, from which channel 30 the fan 28 causes the air to flow through openings 34 in the rear wall 32, substantially horizontal direction and then joined to the air curtain 26.

Luftridån 26 värms av diskens omgivning under sin rörelse från det andra stället 25 till det första stället 24, varigenom varor i lägre belägna utrymmen 12 blir sämre kylda av luftridån 26 än varor i högre belägna utrymmen 12. Denna låter luftflödena varifrån luften passerar mellan varorna i sämre kylning kompenseras genom att man genom öppningarna 34 bli större genom lägre belägna utrym- men 12, exempelvis genom att man här anordnar fler öpp- ningar 34, än genom högre belägna utrymmen 12.The air curtain 26 is heated by the surroundings of the counter during its movement from the second place 25 to the first place 24, whereby goods in lower located spaces 12 are less cooled by the air curtain 26 than goods in higher located spaces 12. This allows the air flows from which the air passes between the goods in poorer cooling is compensated by becoming larger through the openings 34 through lower spaces 12, for example by arranging more openings 34 here, than through higher spaces 12.

När kylelementet 22 skall frostas av ges signal till ett organ 36, som sätter kylelementet 22 ur drift, aktiverar ett värmeelement 38 och stoppar fläkten 28. Fläkten 20 fortsätter härvid att cirkulera luft, som nu värms av elementet 38, genom kanalen 18, kylelementet 22 och ridån 26. Genom att fläkten 28 står stilla, fuktiga avfrostningsluft, som nu cirkuleras av fläkten 20, från att strömma via öppningarna 34 genom varorna och bilda frost på nu hindras den den dessa. Ej visade spjäll kan även vara anordnade för att bryta kommunikationen mellan kanalerna 18 och 30 under avfrost- ningsperioden. i , 595 561 f 3 s _, i För att minska energikonsumtionen 'nas .disk-en kan man på i sig känt sätt med fläktar 40 cirkulera okyld luft i en eller flera ytterligare luftridåer 42 utanför ridån 26.When the cooling element 22 is to be frosted off, a signal is given to a means 36, which puts the cooling element 22 out of operation, activates a heating element 38 and stops the fan 28. The fan 20 hereby continues to circulate air, which is now heated by the element 38, through the duct 18, the cooling element 22 and the curtain 26. Because the fan 28 is standing still, moist defrost air, which is now circulated by the fan 20, from flowing through the openings 34 through the goods and forming frost on it is now prevented therefrom. Damper (not shown) can also be arranged to interrupt the communication between the channels 18 and 30 during the defrosting period. i, 595 561 f 3 s _, i In order to reduce the energy consumption of the disk, uncooled air can be circulated with fans 40 in one or more additional air curtains 42 outside the curtain 26 in a manner known per se.

Claims

10 15 20 25 30 505 561 <4 _ P a t e n t k r a v

1.; Freezer counter (10) having a substantially vertical rear wall (32), a plurality of shelves (14) arranged one above the other for storing goods at freezing temperature, a first air duct (18) extending from a first place (24 ) at the leading edge of the lower shelf, in a substantially horizontal direction below the lower shelf, in a substantially vertical direction behind the rear wall (32) and in a substantially horizontal direction above the upper shelf to a second place (25) above the leading edge of the upper shelf, a first fan (20) for circulating air through the duct (18) to the second place from which the air moves (26) (24), (25), outside the leading edges (22) of the shelves downwards in an air curtain to to the first place a cooling element cooling the air circulating through the duct, freezing temperature, and openings (34) in the rear wall (32) to provide air flows from the first air duct (18) through the spaces (12) formed between the shelves (14), kånneteckn that the cooling element (22) is intended to be frosted by causing the fan (20) to circulate heated air through the duct (18) and that means (36) are arranged to shut off said air flows through the spaces (12) between the shelves (12). 14) when the cooling element (22) is frosted off.

Freezer counter according to claim 1, characterized in that the openings (34) are such that the air flows are greater through lower spaces than through higher spaces.

Freezer counter according to claim 1 or 2, characterized in that the openings (34) communicate with the air duct (18) via a second air duct (30), that a second fan (28) is arranged in the second air duct (30) to provide said air flows and that said means (36) switches off the second fan (28) when the cooling element (22) is frosted off.