DE202005014373U1 - No-frost refrigerating appliance - Google Patents

Abstract

No-frost refrigeration unit with one Evaporator (8), a pipe heater (20) and a the evaporator (20) and the pipe heater (8) carrying the carrier (7), wherein the pipe heater (20) a plurality of interconnected one-piece comprises parallel pipe sections (21, 21a-21r), characterized in that Beginning and end of the pipe heater (20) at two immediately adjacent parallel pipe sections (21a, 21b) are located.

Description

The The present invention relates to a no-frost refrigerator. Such an assembly conventionally comprises a carrier on which an evaporator and a heater are housed. The assembly is in a refrigerator of the refrigerator close to the ceiling to demarcate a chamber mounted and communicates with the refrigerator or Through cold rooms a forced ventilation. The separation of the evaporator chamber from the cold rooms allows the evaporator with switched off forced ventilation with To heat the heating help, so as to defrost ice, which in the course of the operation of the refrigerator on the evaporator reflected.

at a known assembly of this type is the heating as a pipe heater formed, i. in the form of a tube, in which a bad electrical conductor is housed, which are acted upon for heating with electricity can. In the known pipe heater, the tube is meandering on a Wärmeleitblech laid, i. It has a large number of parallel sections, from which two adjacent are each connected by a pipe bend. The beginning and end of the tube are thus at opposite ends edges the Wärmeleitblechs. Around the electrical leads connected to the two ends of the tube merge and together from the case must lead out at least one of these leads over about an edge length of the heat conducting appropriate distance away in the housing to be laid and fixed, what an extra Step required after installation of the pipe heater in the housing power.

task The present invention is to provide a no-frost refrigerator with an evaporator assembly. in which this step can be omitted.

By doing according to the invention beginning and end of the pipe heater is at two immediately adjacent parallel Can be located at pipe sections connected electrical leads on a short, one's own Fixation of the supply lines to the carrier not requiring path are led out of the evaporator chamber.

Around Beginning and end of pipe heating to parallel pipe sections too are preferably two parallel pipe sections, which are located on opposite sides of the pipe heater, with each other directly connected by a pipe bend.

at a first embodiment extends this pipe bend in the same plane as the parallel pipe sections. In this case, the pipe bend as well as the parallel pipe sections be placed below the evaporator and heat it from below.

one second embodiment, the pipe bend runs outside the plane of the parallel pipe sections, preferably at one end face of the evaporator along or across the evaporator.

Around To simplify the installation of the pipe heater, it is preferable in height of the parallel pipe sections connecting pipe bends to projections of the carrier fixed. Such a fixation can in particular the conventional heat conducting as a carrier make the pipe heating superfluous.

The projections preferably comprise at least one first projection, the outside abuts a central portion of the sheet, and a second projection, the inside at both ends of the arch, at the transition between the arch and the adjoining parallel pipe sections, is applied. This second projection can also in two separate, at each one end of the bow fitting projections be split.

Around the pipe heater on the carrier to fix, the first projection preferably forms the bow embracing hook.

Further Features and advantages of the invention will become apparent from the following Description of exemplary embodiments with reference to the attached Characters.

It demonstrate:

1 a schematic section through the upper portion of a no-frost refrigerator according to the present invention;

2 a view of the pipe heater according to a first embodiment of the invention;

3 a perspective view of the pipe heater according to a second embodiment;

4 the pipe heater off 2 mounted on a carrier;

5 a detail view illustrating the assembly of the pipe heater according to a modified embodiment; and

6 a cut of the details 5 ,

1 shows a schematic section through the upper portion of an inventive No-frost refrigerating appliance. The refrigerator has a body 1 and a door 2 , each in a conventional manner than with a heat-insulating foam layer 3 filled hollow body are realized. The interior of the corpus 1 is by a likewise heat-insulating partition 4 divided into an evaporator chamber 5 and a refrigerated compartment 6 , The partition 4 is through the bottom of a carrier 7 formed for an evaporator assembly, on which a known finned evaporator 8th is mounted. The carrier 7 is at a distance from the ceiling of the carcass 1 mounted and adjacent to the side walls of the carcass 1 the evaporator chamber 5 from. The carrier 7 has an air intake passage 9 at his door 2 facing side and an air outlet passage 10 at its the back wall of the corpus 1 facing side 16. In a rear area of the evaporator chamber 5 , behind the air outlet passage 10 of the carrier 7 , is a fan 11 with paddle wheel 12 and engine 13 housed the air from the evaporator chamber 5 peels off and into an air duct 14 suppressed.

In the exemplary section of the 1 extends the air duct 14 only through the partition 4 and flows into the cooling compartment immediately below 6 , The air duct 14 could alternatively also inside the back wall of the carcass 1 be guided and with a plurality of through holes to the refrigerator compartment 6 Be provided over which the flowing in the air duct cold air over the height of the cooling compartment 6 equally distributed. Furthermore, in the air duct 14 a valve may be provided, which is the cold air flow through different branches of the air duct optionally one of several compartments of the refrigeration device, such as the refrigerator compartment 6 and a freezer, not shown, zuleitet.

2 shows a perspective view of one on the carrier 7 below the evaporator 8th attached pipe heater 20 , The pipe heater 20 comprises a plurality of rectilinear pipe sections parallel to each other 21a , b, c, ..., each of which except the rear left tube section 21a with an immediately adjacent section 21 through a pipe bend 22 connected is. The pipe section 21a is with the front, right rectilinear section 21r through an elongated pipe bend 23 connected, extending over the entire width of the pipe heating 20 extends. Beginning and end of the pipe heating 20 are thus at mutually adjacent parallel sections 21a , b, so that to these subsequent supply wires 24 together on the shortest way out of the evaporator chamber 5 can be led out. A dotted cuboid above the pipe heating 20 symbolizes the evaporator B. The evaporator 8th may be, for example, a known and not shown here in detail lamellar evaporator, with the pipe sections 21 is arranged parallel or perpendicular slats.

3 shows a modified embodiment of the pipe heater 20 in which the elongated pipe bend 23 from the plane of the pipe sections 21 is led out and in front of the air outlet 10 facing side of the evaporator 8th extends.

4 shows in a perspective view of the pipe heater 20 out 2 mounted on the carrier 7 , The pipe sections 21 lie on a floor plate 25 of the carrier 7 on, the one of the air inlet 9 surrounding front wall 26 to an edge 27 slightly sloping down. Behind the edge 27 follows a steep downhill section 28 and a gutter 29 in which - since they are the deepest area of the bottom plate 25 represents - from the evaporator 8th accumulating drain water collects and through an opening 30 in the bottom of the channel to a known per se and not described evaporator drains. Every one of the back 16 of the carrier 7 facing pipe bends 22 is at the bottom plate 25 fixed by a group of three cones 31 one of which is on the outside of the bow 22 whose vertex touches and the other two on the inside of the sheet in each case in the transition region to the rectilinear pipe sections 21 issue. Through the three pins 31 is the position of each pipe bend 22 exactly defined in the horizontal.

Four of the bottom plate 25 protruding bifurcated support elements 32 are provided to them on the evaporator 8th attach by placing a refrigerant pipe each of the evaporator into the fork of the carrier elements 32 inserted and locked in a widening of the fork.

5 shows a detailed view of the bottom of the carrier 7 in the vicinity of the edge 27 according to one opposite 4 slightly modified embodiment, wherein in this embodiment, the two the inside of the sheet 22 touching pins 31 by a broad, upwardly tapered projection 33 are replaced and the the apex of the bow 22 touching pins 31 a better in the cut of the 6 to be recognized recess 34 has in the bow 22 intervenes. The pipe heater 20 is mounted by first their pipe bends adjacent to the back 22 in a vertical orientation, as in 5 and 6 each shown in dashed lines, on the section 28 the bottom plate 25 be put on. It is not important that the bows 22 each exactly symmetrical with respect to the pin 31 and the lead 33 to be placed; it is enough if the to the bow 22 subsequent straight pipe sections 21 on different sides of the top of the ledge 33 lie. When the pipe heater 20 against the ground plate 25 is pivoted in the position shown in solid, the arc centered on the projection 33 automatically, so that its vertex exactly in the recess 34 of the pin 31 to come to rest.

Through the recess 34 the pin acts 31 as a hook, the pipe bend 22 prevents it from getting out of the section 28 withdraw. The broad lead 33 prevents the sheet from slipping to the left in 6 so that the elbow from the recess 33 can not move out and the pipe heater 20 thus firmly locked.

The front, the air inlet opening 9 facing pipe bends 22 can through cones 31 and projections 33 similar to those in 5 and 6 shown on the bottom plate 25 be locked, although in these latter projections a recess in which engages the apex of the pipe bend must be very flat to a pressing of the pipe bends 22 ' between the pins and projections to allow in a horizontal orientation.

Due to the different slopes of the bottom plate 25 in front and behind the edge 27 stands the fully assembled pipe heater 20 under a bending stress that prevents rattling of the pipe heater due to vibrations occurring during operation of the refrigerator.

Claims (7)

No-frost refrigeration unit with an evaporator ( 8th ), a pipe heater ( 20 ) and one the evaporator ( 20 ) and the pipe heater ( 8th ) carrying carrier ( 7 ), whereby the pipe heating ( 20 ) a plurality of mutually integrally connected parallel pipe sections ( 21 ; 21a - 21r ), characterized in that the beginning and end of the pipe heating ( 20 ) on two directly adjacent parallel pipe sections ( 21a . 21b ) are located. No-frost refrigerating device according to claim 1, characterized in that two parallel pipe sections ( 21a . 21r ) on opposite sides of the pipe heating by a pipe bend ( 23 ) are directly connected. No-frost refrigerating device according to claim 2, characterized in that the pipe bend ( 23 ) in the same plane as the parallel pipe sections ( 21 ; 21a - 21r ) runs. No-frost refrigerating device according to claim 2, characterized in that the pipe bend ( 23 ) outside the plane of the parallel pipe sections ( 21 ; 21a - 21r ) runs. No-frost refrigerating device according to one of the preceding claims, characterized in that the pipe heating ( 20 ) at the level of the parallel pipe sections ( 21 ; 21a - 21r ) connecting pipe bends ( 22 ) on projections ( 31 . 32 ) of the housing ( 7 ) is fixed. No-frost refrigerating device according to claim 5, characterized in that the projections ( 31 . 32 ) at least a first projection ( 31 ) located on the outside at a central portion of the arch ( 22 ), and a second projection ( 31 . 32 ), the inside at the two ends of the bow ( 22 ). No-frost refrigerating device according to claim 6, characterized in that the first projection ( 31 ) a bow ( 22 ) forms encompassing hook.