DE102006005548A1 - Recirculation refrigeration unit with nozzle - Google Patents

Abstract

The present invention relates to a refrigeration device with a heat - insulating housing (1) and an interior (6) cooled by the circulation of cooling air and surrounded by the housing (1), as well as openings on at least one wall of the storage room (6). A valve (29, 30; 31) can be switched between an open position in which it releases the supply of cooling air into the storage space (6) through a first (25) of the openings, and a closed position in which there is a supply of Cooling air in the storage room (6) through the first opening (25) blocks. The cooling air flow emerging from the first opening (25) can be used for the targeted, rapid cooling of individual refrigerated goods.

Description

The The present invention relates to a refrigerator with a heat-insulating casing and a cooled by circulation of cooling air surrounded by the housing Storage room, as well as openings on at least one wall of the storage room for introducing cooling air into the storage room.

Refrigeration appliances of this type, so-called circulating-air refrigerators or no-frost refrigerators, are known. They generally have a forced-ventilated by a fan evaporator, which is arranged in a thermally separate from the storage room of the refrigerator evaporator chamber. At the evaporator is sucked out of the storage room of the refrigerator sucked air to cool them and to dry by condensation. The thus obtained dry cooling air is introduced from the evaporator chamber via one or more channels and openings on the walls of the storage room of the refrigerator in the storage room. The openings are usually designed as a column and are distributed in several places on one or more inner walls of the storage room to obtain a homogeneous temperature distribution in the storage room. A refrigerator of this type is for example in the DE 101 43 242 A1 disclosed. Due to the homogeneous temperature distribution, a rapid cooling of individual refrigerated goods is not possible.

task The present invention is a refrigerator of the type mentioned provide that allows rapid cooling of individual refrigerated goods.

The Task is solved by a refrigeration device with the Features of claim 1 or claim 5.

Therefore has a type specified at the outset on a valve that between one opened Position in which it passes through the supply of cooling air in the storage room a first of the openings releases, and a closed position is switchable in the it is a supply of cooling air into the storage room through the first opening blocks. That exists the possibility, a cooling air flow as needed through the first opening leak, for example, a chilled goods, which is located near the first opening, to cool quickly. Will the extra Cooling air flow through the first opening no longer needed, can this over the valve will be switched off again.

Preferably is in both valve positions, a supply of cooling air in the storage room by at least a second of the openings possible. Independently of it, whether cooling air emerges from the first opening or not, is thus a cooling the remaining areas Warehouse guaranteed. However, it is also an execution conceivable, in the case of open Position of the valve, i. when cooling air exits the first opening, the escape of cooling air from the second or possibly further of the openings is prevented. With high refrigeration demand can with it for shock cooling individual cooling air cooling air too only from the first opening be dismissed.

Preferably, the first opening releases a bundled cooling air flow, and thus differs from the designs provided in the prior art, in which, as in the DE 101 43 242 A1 provided, the cooling air, in order to achieve a homogeneous temperature distribution, exits as diffusely as possible from the gap-shaped openings 15. With a bundled cooling air flow, however, a targeted, direction-oriented cooling of individual refrigerated goods is possible.

Preferably has the refrigeration device according to the invention a Fan on, the first and the second or if necessary further openings, those in the convective-related Storage room open, with cooling air provided. This is a simpler and therefore cheaper Structure of the refrigerator by a simple design of the fan to the openings leading Cooling air ducts possible.

The Object of the present invention is also achieved by a refrigerator from the beginning specified type, in which the opening Part of a nozzle is, which is directionally adjustable held on the wall. In order to becomes a bundled, in his direction adjustable cooling air flow obtained targeted to a set refrigerated goods can be aligned without the refrigerated goods for a strictly predetermined Place must be arranged.

Preferably includes the nozzle a directionally adjustable pipe section, by the limited Flow area a targeted cooling individual refrigerated goods is possible.

alternative can the nozzle however, they also include fins extending across the free flow area the nozzle extend and pivot. about the swiveling fins can be the airflow at its exit angle be set.

Preferably, the nozzle has two pivot degrees of freedom, that is, the nozzle is pivotable about two axes of rotation perpendicular to each other. Thus, the cooling air flow can be optimally aligned to a parked on a refrigerated goods chilled goods. Preferably, the nozzle is pivotable about both axes of rotation by about 180 °. The nozzle may, for example, have a hollow-spherical nozzle body which is in spherical shell-shaped Bearings is held.

Preferably the valve is part of the nozzle. Alternatively, the valve may also flow upstream of the opening in one of the opening cooling air supplying cooling air duct be arranged.

Preferably is the nozzle arranged on the ceiling of the storage room. This is the cooling air flow in accordance with the natural Convection directed downwards and thus are below for effective cooling refrigerated goods also no high flow rates the exiting air flow necessary. The entire surface of a topmost Refrigerated goods carrier is for with the nozzle rapidly cooling Refrigerated goods for Available. In addition, the area below the ceiling of the storage room, i. above of the top refrigerated goods carrier in usually for the user easily accessible and thus can settings at the nozzle be easily made. However, it is also conceivable, the nozzle on one of side walls the storage room or the inner wall of the refrigerator door.

at it can be the refrigeration device according to the invention For example, a household refrigerator or to a household freezer act.

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

1 a perspective view of the body 2 a refrigeration device according to the invention according to a first embodiment, viewed from diagonally below;

2 a vertical section through the body 2 in one along the line I off 1 extending level;

3 a vertical section through the body 2 in one along the line II 1 extending level;

4 an enlarged sectional view of the in 2 illustrated nozzle 17 ;

5 in the 4 illustrated nozzle 17 in closed condition;

6 in the 4 illustrated nozzle 17 in one opposite the 3 pivoted state;

7 a second embodiment of a refrigerator according to the invention in one of 3 corresponding sectional view.

1 shows a perspective view of a refrigerator according to the invention in a view obliquely from below. The refrigeration device comprises a heat-insulating housing 1 of which in the drawing the heat-insulating body 2 is shown. The the housing 1 also forming and on the body 2 hinged also heat-insulating door is omitted in the drawing. The body 2 and the door, not shown, surround an interior 4 , In the interior 4 One is located directly below the ceiling of the carcass 2 arranged evaporator chamber 5 , which has a heat-insulating partition wall 7 from a storage room underneath 6 is separated. In the storage room 6 are located as in 2 shown, several superposed refrigerated goods 15 for storing refrigerated goods, however, in the 1 are omitted, as large as possible the ceiling 8th and the back wall 9 of the storage room 6 to be able to show.

At the front of the partition 7 is an air inlet opening 10 formed by the air from the storage room 6 in the evaporator chamber 5 can occur. On the back wall 9 of the storage room 6 There are several pairs of openings 11 through which passes out of the evaporator chamber 5 originating cold cooling air can flow out. The height of these pairs of openings 11 is chosen so that if as in 2 shown, the refrigerated goods 15 in the storage room 6 are mounted, each pair of openings 11 one of refrigerated goods carriers 15 limited compartment supplies.

On the ceiling 8th of the storage room 6 is a channel part 16 attached to the door of the refrigerator end facing a nozzle 17 is appropriate. About the nozzle 17 can also from the evaporator chamber 5 resulting cold cooling air in the storage room 6 flow out.

2 shows the refrigerator the 1 in a section that runs in a vertical plane, the in 1 is indicated by a dashed line I. Inside the evaporator chamber 5 are cooling coils of an evaporator 18 to see. In the rear area of the evaporator chamber 5 is a fan 20 arranged the air over the air inlet opening 10 from the storage room 6 sucks and over the cooling coils of the evaporator 18 leads. The cold and dried cooling air leaves the evaporator chamber 5 and flows behind the fan 20 in two in the back wall 9 parallel distribution pipes 21 and leaves them over in the back wall 9 located openings 11 , In 1 is the course of the two distribution lines 21 in the back wall 9 shown in broken lines. 2 shows the right of the two distribution lines 21 in sectional view.

3 shows the refrigerator of 1 in another section. This runs as well as the Cut from 2 in a vertical direction in the depth direction of the refrigerator level, in 1 indicated by the dotted line II. 3 shows a section through a median plane of the refrigerator through the channel part 16 and the nozzle 17 , As can be seen from the sectional view, is located adjacent to the fan 20 in the partition 7 an opening 23 that is in one of the channel part 16 formed air duct 24 empties. At the channel part 16 it may be, for example, a shaped plastic molded part. At the door end of the canal part 16 is the nozzle 17 , About the opening 23 and the air duct 24 becomes the nozzle 17 supplied with cold dried cooling air. The one out of the nozzle 17 from an exit opening 25 emerging bundled cooling air flow can be used to one on the upper refrigerated goods 15 stored refrigerated goods 13 , such as a beverage bottle, targeted and quickly cool. From the in 1 and 2 shown openings 11 On the other hand, the cooling air diffuses in a diffuse manner to ensure a uniform distribution of the cooling air over the entire storage space 6 and thus achieve a homogeneous temperature distribution.

The 4 to 6 show the nozzle 17 in an enlarged sectional view in different positions or settings. 4 shows the nozzle 17 in vertically downwardly facing, open position and 5 in closed position. In 6 is the nozzle 17 shown in pivoted and open position.

How out 4 can be seen, includes the nozzle 17 a hollow spherical nozzle body 27 with an air duct 24 facing inlet opening 28 , via the cold cooling air into the interior of the nozzle body 27 can occur. At the entrance 28 opposite side of the nozzle body 27 , and thus the storeroom 6 facing, is a piece of pipe 29 in an opening on the nozzle body 27 mounted with radial orientation, ie the longitudinal axis of the pipe section 29 passes through the center of the spherical nozzle body 27 , The pipe piece 29 is displaceable in the radial direction or screwed into and out of the nozzle body via a thread 27 guided. At the outer end of the pipe section 29 is the exit opening 25 for cooling air. Central in the interior of the nozzle body 27 is a ball 30 about striving 31 on the nozzle body 27 held. The inside of the nozzle body 27 facing end of the pipe section 29 and the diameter of the ball 30 are coordinated so that when pressing the pipe section 29 on the ball 30 no air through the pipe section 29 can escape. The pipe piece 29 and the ball 30 thus act as a valve. By screwing in and unscrewing the pipe section 29 the refrigeration appliance user can through the outlet opening 25 Set or switch off the exiting cooling air volume flow. 4 shows an open state. 5 however, the closed state in which the pipe section 29 so far into the nozzle body 27 screwed in is that the pipe section 29 at the ball 30 the concern comes, so no more cooling air from the outlet opening 25 can flow.

The hollow spherical nozzle body 27 is in a spherical shell-shaped bearing shell 32 at the channel part 16 about a lying in the plane of horizontal pivot axis and about a further plane perpendicular to the plane of rotation pivotally mounted. 6 shows the nozzle body 27 in one opposite the 4 pivoted to the left position. As in 1 represented by arrows, is the nozzle body 27 and thus the pipe section 29 pivotable both about a horizontal axis in the width direction of the refrigerator and about a horizontal axis in the depth direction of the refrigerator. This gives the possibility of the nozzle 17 Aligning exiting cooling air flow on the rapidly cooled refrigerated goods, without already on the top refrigerated goods 15 to have cleared set chilled goods.

Like from the 2 and 3 can be seen, the fan provides 20 both the openings 11 in the back wall 6 of the storage room 6 as well as the outlet opening 25 the nozzle 17 with cooling air. The refrigerator according to the invention can be operated such that in the cooling phase, ie when the fan cold, dried cooling air from the evaporator chamber 5 promotes, (a) exclusively from the openings 11 in the back wall 9 Cooling air escapes and the valve 29 . 30 the nozzle 17 is closed or (b) from the openings 11 in the back wall 9 and the exit opening 25 the nozzle 17 Cooling air escapes, the user in this case the valve 29 . 30 must have opened. In the mode (b) is over the out of the openings 11 diffused cooling air a homogeneous temperature distribution in the storage room 6 achieved, and at the same time can be cooled quickly over the cooled from the nozzle 17 exiting cooling air flow to be cooled. Finally, another mode of operation (c) is conceivable, when the valve is open 29 . 30 exclusively from the nozzle 17 cold cooling air escapes and a cooling air supply to the openings 11 is prevented, for example, by in 2 behind the fan 20 at the entrance of the distribution lines 21 arranged, but not shown flaps. This would make it possible to get through to the nozzle 17 available high refrigeration capacity to cool individual refrigerated goods even faster, for example, hot food, where quality losses should be avoided.

Deviating from the in the 1 to 6 illustrated embodiment, the nozzle 17 without channel part 16 directly at the partition 7 be arranged and the air duct 24 to supply the jet 17 with cold cooling air integrated in the partition 7 run. There is also the possibility of the nozzle 17 to arrange on another inner wall of the storage room, for example on one of the in 1 shown side walls 12 or the door inner wall. In addition, several such nozzles may be appropriate.

7 shows a second embodiment of a refrigerator according to the invention in one of 3 corresponding sectional view. In contrast to the embodiment described above, the pipe section 29 not pivotally mounted, but in vertically downwardly directed position on the channel part 16 directionally mounted. About the outlet opening 25 A concentrated and downward airflow can escape. In the air duct 24 is a valve 31 , for example a butterfly valve 31 arranged. About a user-operated, not shown lever or switch, the valve 31 be brought from a closed position shown in broken lines in an open position shown in solid lines. This allows an air flow from the pipe section 29 as needed, for example, for rapid cooling of a product to be cooled, switched on or off. The chilled goods to be cooled must be placed in the exiting air stream, as the pipe section is not pivotable. Also in this embodiment may differ from the 7 the cooling air duct 24 in the partition 7 run. Also, the pipe section 29 on another inner wall of the storage room 6 be arranged, such as one of the side walls or the door inner wall.

Claims (9)

Refrigerating appliance with a heat-insulating housing ( 1 ) and cooled by circulation of cooling air from the housing ( 1 ) surrounded storage room ( 6 ), as well as openings on at least one wall of the storage room ( 6 ) for introducing cooling air into the storage room ( 6 ), characterized in that the refrigeration device is a valve ( 29 . 30 ; 31 ) between an open position in which it is the supply of cooling air into the storage room ( 6 ) by a first ( 25 ) of the openings, and a closed position is switchable, in which there is a supply of cooling air into the storage room ( 6 ) through the first opening ( 25 ) locks. Refrigerating appliance according to claim 1, characterized in that the first opening ( 25 ) releases a bundled cooling air flow. Refrigerating appliance according to claim 1 or 2, characterized in that a supply of cooling air into the storage room ( 6 ) by at least one second ( 11 ) of the openings from the position of the valve ( 29 . 30 ; 31 ) is unaffected. Refrigerating appliance according to one of claims 1 to 3, characterized in that the refrigeration device is a fan ( 20 ) having the first opening ( 25 ) and the second opening ( 11 ) supplied with cooling air. Refrigerating appliance, in particular according to one of claims 1 to 4, with a heat-insulating housing ( 1 ) and a cooled by circulation of cooling air, surrounded by the housing storage space ( 6 ) and at least one opening ( 25 ) on at least one wall ( 8th ) of the storage room for introducing cooling air into the storage room ( 6 ), characterized in that the first opening is part of a nozzle ( 17 ), which is directionally adjustable on the wall ( 8th ) is held. Refrigerating appliance according to claim 5, characterized in that the nozzle ( 17 ) a directionally adjustable pipe section ( 29 ). Refrigerating appliance according to claim 5 or 6, characterized in that the nozzle ( 17 ) has two pivot degrees of freedom. Refrigerating appliance according to one of claims 5 to 7, characterized in that the valve ( 29 . 30 ) Part of the nozzle ( 17 ). Refrigerating appliance according to one of claims 3 to 8, characterized in that the nozzle ( 17 ) on the ceiling ( 8th ) of the storage room ( 6 ) is arranged.