DE102006024801A1 - Refrigerator is cooled at low ambient temperature with cold ambient air, and is designed as drawer, which prevents falling of cold inner air, while opening, where condenser is attached in free side - Google Patents

Abstract

The refrigerator is cooled at low ambient temperature with cold ambient air. The refrigerator is preferably installed in the northern side of a house and connected with two air ducts with a free side. The refrigerator is designed as a drawer, which comfortably attains chilled goods. The drawer prevents the falling out of cold inner air, while opening. A condenser in free side (6) is attached for energy conservation, which attains cooling of the condenser with cool air temperatures.

Description

• • Unterhalb einer festgelegten Außentemperatur (hier: 5°C) schaltet die elektronische Steuerung die Kompressorkühlung aus, nun dienen 2 kleine Lüfter zum Austausch der Kühlraumluft (9) gegen frische, kalte Außenluft (3). Dazu werden durch 2 isolierte Luftkanäle (2) durch die Hauswand (7) der Kühlschrank mit dem Freien, vorrangig der Nordseite des Hauses, verbunden. Die Kanäle werden mit Ventilklappen gegen das Eindringen von Warmluft im Sommer und mit Feingittern gegen Insekten gesichert.
• • Das Kühlgut befindet sich in einer gut isolierten Edelstahlwanne unter einem feststehenden Deckel mit Arbeitsfläche (1) in einer nur nach oben geöffneten Schublade (9) auf Vollauszug (10). So verbleibt die kalte, spezifisch schwerere Luft beim Öffnen wie in einer Kühltruhe und kann nicht herausfallen! Außerdem ist der Zugang bequemer, weil man sich nicht so weit bücken muss. Er wird überdurchschnittlich gut gedämmt (8). Die Dichtfläche zwischen beweglicher Schublade und Deckel mit Verdampfer ist schräg gestellt, damit die Dichtungen (5) beim Einschieben gut schließen.
• • Der Kondensator des Kühlaggregats (Verflüssiger, (6)) wird nach außen verlegt, weil es dort im Schnitt meist kälter ist als im Kücheninnenraum. So braucht der Kühlschrank zur weiteren Energieeinsparung besonders in der kälteren Jahreszeit nicht gegen die geheizte Küche anzukühlen.
• • Zur Kühlung im Sommer dient ein handelsüblicher Kompressor mit Plattenverdampfer und Kondensator. Der Verdampfer (4) wird horizontal über der Lebensmittel-Schublade angeordnet und liegt zur Ableitung der kondensierten Flüssigkeit in einem Plexiglasbehälter, die Luft im Kühlraum wird mittels Belüfter am Verdampfer vorbei im Kreis geführt.

Almost 1/3 of the household electricity (40.7 out of a total of 139 GWh / a) is used in Germany only for cooling. Especially for reasons of energy saving, the "bivalent drawer refrigerator" has been developed and has the following technical features:

• • Below a specified outside temperature (here: 5 ° C), the electronic control switches off the compressor cooling, now 2 small fans are used to exchange the refrigerator air ( 9 ) against fresh, cold outside air ( 3 ). For this purpose, 2 isolated air channels ( 2 ) through the house wall ( 7 ) The fridge is connected to the outside, primarily the north side of the house. The channels are protected against the ingress of hot air in the summer and with fine gates against insects with valve flaps.
• • The item to be refrigerated is located in a well-insulated stainless steel pan under a fixed lid with work surface ( 1 ) in a drawer open only at the top ( 9 ) on full extension ( 10 ). This leaves the cold, heavier air when you open it like in a freezer and can not fall out! In addition, access is more convenient because you do not have to bend over so much. He is well insulated above average ( 8th ). The sealing surface between the movable drawer and lid with evaporator is tilted so that the seals ( 5 ) Close well when inserting.
• • The condenser of the refrigeration unit (condenser, ( 6 )) is moved to the outside because it is usually colder on average than in the kitchen interior. So needs the refrigerator for further energy saving, especially in the colder months not to cool against the heated kitchen.
• • For cooling in summer, a commercial compressor with plate evaporator and condenser is used. The evaporator ( 4 ) is arranged horizontally above the food drawer and is located in a Plexiglas container for discharging the condensed liquid, the air in the refrigerator is passed by means of aerator on the evaporator in a circle.

There the refrigerator with this technique in winter only the electricity for the small fans consumed in the summer in compressor operation but the sun is sufficient seems, the energy demand follows the solar offer. That's the way it is possible, the solar system over a photovoltaic island plant completely without mains power! It is particularly suitable for energy saving households, Refuges and countries in temperate and cooler Widths without public electricity.

One Prototype of the refrigerator with 63 l content is running since May 2004 with the applicant in solar island operation. It became a Danfoss BD35F, refrigerant R134 DC compressor for summer operation and 2 small fans a 0.7 watts used for winter operation. It consumes about 45 kWh per year.

1

fixed Cover with work surface

2

Wall opening with insulation

3

air pipe Valve closure (only Supply air is shown, exhaust pipe is present)

4

lying Evaporator (the compressor is not shown here) with forced air

5

encircling Sealing lip, the sealing surfaces lie at an angle, so is when closing the drawer of graduation optimal.

6

Condenser (condenser) outdoors (mainly north side)

7

housewall (right: inside, left: outside)

8th

portable Drawer with insulation

9

storage room for the refrigerated

10

Full extracts, on they are running the drawer

Claims (4)

The refrigerator becomes at low outside temperatures with the cold outside air cooled. For that will be he preferably installed on the north side of the house and with 2 ventilation channels with connected to the outdoors. fridge according to claim 1 further characterized in that it as a drawer is formed, the refrigerated goods easy to reach. she Also prevents the cold indoor air from falling out when opening. fridge according to claim 1 and 2, characterized in that for further Energy saving is the outdoor condenser (condenser) which is especially cool Air temperatures improved cooling of the condenser (condenser) reached. fridge according to claim 1 and 2, characterized in that it due to the Low energy demand, which is also at the same time outside temperature and thus also according to the solar offer, in addition to energy-saving households especially for Refuges and countries in temperate and cooler Widths with solar power island plants without public power connection suitable.