DE2010717A1 - Lubricating device for encapsulated motor-compressor units - Google Patents

Description

PATENT ADVOCATE

HATE

«MÖNCHEN, deff". Ζ; τ 9yd / R. -PGm 3934 / Gan

European H. O. Canfield Co. GmbH *, Gartenberg / Qbb. , Böhmerwaldstrasse 47

Control device for fully automatic defrosting of refrigerators

The invention relates to a control device for fully automatic Defrosting refrigerators.

Two evaporators are built into modern refrigerators » namely the main refrigerated evaporator and the Qe. freezer steamer. :

to find is di st

coolfa

Gave up

prevent the main cooling compartment evaporator from icing up »

i i

gser equipped with a heater »the

the machine is defrosting

concerned. Still can

the downtimes? | i are low - the main

it is the bond »

u monitor that the door at

of the machine is above O ⁰ C - preferably 3 ° to 5 ⁰ C -.

The problem is solved in that the resistance for the bimetallic springs (of the main circuit) has a is arranged upstream of the main cooler evaporator attached switching device, consisting of a movable one Contact-carrying bimetal strips and the fixed contact, a magnet being assigned to the bimetal strip.

The switching device (also called the evaporator switch) is therefore attached to the main refrigerator compartment evaporator and senses its temperature. When the temperature has reached 3 ° to 5 ° C (plus), for example, the resistor is switched on. For example, if the temperature is below 0 ° (or another value for which the bimetal strip is designed), the aforementioned resistor is not switched on, i.e. the contacts opening and closing the main circuit remain blocked at a distance from one another and the machine does not start. However, where the resistor is energized, then the heating of the two bimetallic springs takes place (this puncture is known per se) and close the contacts, that is the engine is operating so long as it is until the set temperature reaches refrigerator. Then the process described above begins anew.

109839/0770

Another feature of the invention provides .vor that the bimetal strip the vaporizer switch is arranged at such a distance from the magnetic strip that it - if there is no thermal stress - is not influenced. The magnet is only effective when the bimetal strip with its contact something moves in the direction of the fixed contact. The movement to the closed position the two contacts then suddenly takes place in the sense of a spring spring, because both the bimetallic strip strives is to get into this position and this endeavor is supported by the attraction of the magnet.

ι -

The magnet used is preferably a permanent magnet, in particular a flexible magnet known per se Magnets.

The bimetal strip of the vaporizer switch is on a desired temperature. This will usually be between 3 ° and 5 ° C, although this value is not binding is. -

This invention results in the procedural Steps which are characterized in that the temperature of the main refrigerator compartment evaporator is always sampled and if an expected (established) value r ^ ZiiB., van. 5 ° C or Like. - Is determined and so the flawless

109839 / 077Q

- 4 defrosting of the main refrigerator compartment evaporator is guaranteed.

Further details of the invention emerge from the drawing and description; the drawing merely represents a principle sketch in view.

The control device shown is known per se. The contacts are controlled by two bimetal springs 2, 2a 7 opened and closed and thus controlled the machine.

According to the invention, a switching device is installed in front of the resistor 1 placed. This switching device = evaporator switch is attached to the main cooler evaporator and feels the temperature there.

The function sequence of the vaporizer switch is as follows. The bimetallic strip 3 carries the contact 4. The contact is thus moved towards or away from the fixed contact 5, depending after whether the temperature in the main refrigerator compartment evaporator increases or decreases.

109839/0770

At a certain temperature, the contact approaches dem Kon tali t 5. This movement is made by. a certain Instead of being supported and thus accelerated »because the force of the magnet 6 is now effective.

The force of the magnet 6 is not great enough to the receding of the bimetal strip. 3 to prevent.

λ η λ λ <* Λ i rt * l ** ft

Claims (4)

»ATINTANWALT IMDNCHiN, the ^. 2.] sM / R 0 ». WILHELM HATE _pGm ^ _n DIPlOMINOINIiUR Claims / 1.J Control device for fully automatic defrosting of ^ - ^ refrigerators, characterized in that the resistor (1) for the Bimetal springs (2, 2a) (of the main circuit) a switching device attached to the main cooler compartment evaporator is arranged upstream, consisting of a bimetallic strip carrying a movable contact and the fixed contact, wherein a magnet (6) is assigned to the bimetallic strip (3). 2. Control device according to claim 1, characterized in that the bimetal strip (3) is at such a distance from the magnetic strip (6) (preferably it is a permanent magnet) is arranged that it - when not under tension - is not affected. 3. Control device according to at least one of the previous one Expectations, 109839/0770 characterized in that the bimetal strip (3)
is designed for a temperature around 5 C. 4. A method for fully automatic defrosting of refrigerators according to the control device according to the claims I to 3, characterized in that the temperature of the Hauptkühlfacliverdampfers always sampled and if an expected (set) value - for example, it is determined by 5C, v / ith the Haupts tromlcreis for the main refrigerating compartment evaporator preferably before its resistance interrupted again only when a higher than ER ' . '' waited temperature closed. 10-9 8-3.9 / ß 70 Blank page