EP1882133A1

EP1882133A1 - Cooling apparatus with cooling of circulating air and injection of cooling air

Info

Publication number: EP1882133A1
Application number: EP06743254A
Authority: EP
Inventors: Alexander GÖRZ; Hans Ihle; Matthew Ricket; Ralf Spiller; Martin Wagner
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2005-05-10
Filing date: 2006-04-06
Publication date: 2008-01-30
Also published as: CN101171470B; RU2007141050A; WO2006120100A1; RU2402722C2; US20060254303A1; US7444832B2; CN101171470A

Abstract

The invention relates to a cooling apparatus (1) with cooling of circulating air, comprising at least one cold chamber (2) for receiving the goods to be cooled (4), at least one duct (4) for cooling air (5) and a low temperature generator (12) for generating cooling air (5). The low temperature generator (12) is in fluid communication with the cold chamber (2) via the duct (4) that leads into the cold chamber (2) via an outlet opening. According to the invention, a jet forming means (7) is formed by a nozzle element (8) and/or a spacer (10) which is arranged at the outlet opening (6) and keeps the goods to be cooled (4) at a distance from said outlet opening (6). The aim of the invention is to provide precise, regular and energy-saving temperature regulation of the goods to be cooled (4) in the cold chamber (2).

Description

Cooling unit with circulating air cooling and cooling air injection

The invention relates to a cooling unit with circulating air cooling comprising at least one cooling space for receiving refrigerated goods, at least one channel for cooling air, and a refrigeration generator for generating cooling air, wherein the channel fluidly connects the refrigeration generator with the cooling space and opens with an outlet opening in the cooling space ,

In units with recirculation cooling, the cooling air cooled by a central evaporator and conveyed by a fan is introduced by a so-called multi-flow system into the storage room to be cooled in order to even out the temperature distribution in the storage room and to ensure sufficient cooling even with heavy load To ensure storage space.

There are circulating air coolers and circulating air freezers are known which have storage compartments, which are supplied by a foam side arranged air duct with cooling air. The storage space associated side of the metallic inner container of Umluftkühlgeräts or Umluftgefriergeräts initially remains smooth and the metallic inner container along the foam-side air duct via one or more openings, so that cooling air flow out of the channel into the interior of Umluftkühl- or Umluftgefriergeräts can. The air outlet openings themselves are selected in terms of their number and size so that sufficient cooling can be ensured for the respective device. In the known solutions, however, it has been found that the cooling air does not always reach all areas of the interior of the recirculation or Umluftgefriergeräts. For this reason, in the known solutions, the temperature of the cooling air flowing into the cooling chamber must be selected colder than is necessary for sufficient cooling of the cooling material to ensure that all refrigerated goods located in the refrigerator is stored below a predetermined maximum temperature. As a result, the circulating air freezer or Umluftgefriergerät is not operated optimally under the aspect of efficient energy utilization.

It is therefore an object of the present invention to provide a cooling unit with circulating air cooling, which can be operated as energy-efficiently as possible, while ensuring reliable cooling of the cooling unit to be cooled by the cooling unit.

This object is achieved by the cooling device, as specified in the independent claim. Further advantageous embodiments and developments, which can be applied individually or combined with each other, are the subject of the dependent claims.

The cooling unit according to the invention with recirculation cooling comprises at least one cooling space for receiving refrigerated goods, at least one channel for cooling air and a refrigeration generator for generating cooling air, wherein the channel fluidly connects the refrigeration generator with the cooling space and opens with an outlet opening in the cooling space, wherein a beam shaping means provided and wherein the beam-shaping means is provided by a nozzle element and / or by a discharge Stand holder at the outlet opening, by which the refrigerated goods is kept at a distance from the Austrittsöffhung formed.

Under the refrigerator are all refrigerators with convection cooling, especially freezers with convection cooling to understand. In a modification of the invention, a transmission of the invention to Umluftherde is conceivable, according to the circumstances of a Umluftherdes the cooling air to be replaced by hot air, the refrigerated goods through kiln goods, the refrigerator through a furnace chamber or the refrigeration generator by a heat generator.

By the beam shaping means influencing the exiting into the cooling chamber cooling air flow is made possible. In particular, a cooling air flow is effected deep into the cooling space. In this case, turbulence and vortex are preferably avoided.

The cooling air flow is advantageously formed horizontally in the cooling space with the aid of the beam-shaping means and extends in particular in a direction perpendicular to the cooling-chamber inner surface, within which the outlet opening is located.

The outlet opening may be located at the rear of the cold room, ie at the side opposite the door or the flap of the cold room. However, it can also be arranged on the side walls of the refrigerator. Advantageously, a plurality of outlet openings, in particular between 2 and 20, advantageously between 4 and 10, are provided on the inner surfaces of the cooling space in order to effect the most uniform possible cooling of the cooling material in the cooling space.

With the help of a spacer ensures that the refrigerated goods is kept at a distance from the outlet opening, so that a sealing of the outlet opening is avoided. With the help of the spacer dead spaces are avoided in the refrigerator, which are insufficiently supplied with cooling air due to unfavorable positioning of the refrigerated goods in front of an outlet opening. This also supports a precise, uniform, rapid and reliable cooling of the refrigerated goods.

Both the nozzle element and the spacer contribute to the fact that the temperature distribution in the cooling space is made uniform and a lowering of the temperature of the cooling air to avoid exceeding a maximum temperature in a partial area within the cooling space is no longer required. As a result, the refrigerator can be operated energy-saving. With the help of the invention it is possible to comply with very low Temperaturschwankungstolleranzen even with significant load changes, ie with frequent opening of the refrigerator door or a highly variable amount of refrigerated goods in the refrigerator. By causing the beam forming agent stronger temperature coupling between refrigerated goods and refrigeration generator actually required amount of cold can be made more precise of the refrigeration generator available. In one embodiment, the beam shaping means is formed by a tapered portion in the outlet opening, through which a cross section of the channel in the outlet opening to the cooling space is substantially smoothly reduced, in particular the cross section of the channel by at least 20%, preferably by at least 30% and especially preferably at least 40%, is reduced.

By the tapering section, a nozzle effect is achieved, which allows a particularly stable flow of the cooling air into the interior of the cooling space. Due to the substantially smooth reduction of the cross section, a favorable hydrodynamic view of the injection of cooling air is possible. By the smooth, d. H. As stepless and edge-free reduction vortex and turbulence are avoided, which would otherwise lead to an instability of the flow and impede an inflow of cooling air into deeper areas of the refrigerator.

The beam shaping means may have a curvature along which the cooling air is introduced into the cooling space. The curvature can be formed on only one side or on several sides of the outlet opening, wherein advantageously the curvature is arranged on the upper side of the outlet opening.

The inside of the beam shaping means facing the outlet opening can be designed so that it describes as large a radius as possible on the side of the incoming air. The cooling air flowing in the duct has, in accordance with the laws of fluid mechanics, the tendency to follow this curvature and exit from the outlet opening. In this case, it is not necessary to introduce a barrage for increasing a dynamic pressure and turbulence is avoided. which less disturbs the flow conditions in the overall system and improves the efficiency of the refrigerator.

Advantageously, the radius of the curvature is at least 5 mm, in particular at least 10 mm, preferably at least 20 mm, particularly preferably at least 30 mm, and / or is less than 200 mm, in particular less than 100 mm, preferably less than 50 mm. Such a shape of the beam-shaping means advantageously influences the flow conditions in the cooling space.

In a particular embodiment of the invention, the jet-forming agent with a projection of at least 10 mm, in particular at least 15 mm, preferably at least 20 mm, extends into the cooling space. By this projection, an adjustment of the outlet opening is largely avoided by refrigerated goods and the cooling air can flow through the gap between an inner wall of the cooling chamber and the refrigerated goods, without an excessive flow resistance caused by the refrigerated goods. Thus, a sufficiently large flow of cooling air is provided in this area of the cooling space and an insufficiently cooled subspace is avoided.

In particular, a combination of Kühllufteindüsung with the spacer is advantageous because the depth, which is required for the widest radius of the curvature, can be used to use the beam shaping means both for generating a particularly deep space flow as well as to ensure a cooling air flow. Advantageously, the beam-shaping means is formed by a distance edge arranged above the outlet opening, which protrudes beyond the outlet opening with respect to the outlet opening. This leaves a minimum discharge cross section, even if stored goods are pushed directly against the outlet opening.

The beam shaping means may be provided on an inner side of the cooling space. However, it may also be integrated in a wall of the refrigerator, wherein it may protrude partially over the inside of the refrigerator.

Advantageously, the beam-shaping means is arranged substantially above the outlet opening. A board as a supernatant is advantageous because it prevents the ingress of condensation or dirt in the channel.

The beam shaping means may be wider than the width of the channel and / or its height slightly larger than the exit opening of the channel. In a special embodiment of the invention, the jet-forming means extends over at least 1/3 of the inner region of the cooling space, in particular over at least half of the inner width of the cooling space, or over the entire width of the cooling space. As a result, an intermediate space between the item to be cooled and the inner wall of the cooling space is advantageously created even when the entire inner width of the cooling space is adjusted with refrigerated goods. It is advantageous if the jet-forming agent can be placed on an inner side of the cooling space. In particular, can be retrofitted by the applicability known cooling devices, whereby their cooling efficiency or cooling properties of these devices can be improved.

The beam-shaping means advantageously has adhesive surfaces and / or latching elements, with which it is attached to the inside of the cooling space. As latching elements locking lugs or locking projections can be used. They can advantageously be clipped.

In a special embodiment of the invention, the channel is guided along one side of the channel space and opens at an angle into the cooling space. This embodiment is particularly advantageous when the refrigeration generator is located at the very bottom or at the top of the refrigerator and the channel thereof must be guided along one side of the refrigerator.

The jet-forming agent is advantageously produced by injection molding.

Particular details and further advantages will be explained in more detail with reference to the following drawings, which are not intended to limit the invention but merely to illustrate it by way of example. They show schematically:

Fig. 1 shows a detail of a cooling device according to the invention in one

Sectional view from the side, Fig. 2 shows a detail of a cooling device according to the invention in one

Front view and

Fig. 3 is a beam forming means in a sectional view from the side, as it can be used for the inventive cooling device of FIG.

1 shows a section of a cooling device 1 according to the invention in a sectional view from the side with a cooling space 2 for receiving refrigerated goods 3, which is cooled by means of cooling air 5, which is provided by a refrigeration generator 12 via a channel 4. The refrigerating generator 12 is located above the cooling space 2. The cooling air 5 is introduced into the cooling space 2 via an outlet opening 6, as shown by the arrows in the figure, wherein a jet shaping means 7 positively influences the flow of the cooling air. In the illustrated example, the cooling material 3 is located immediately in front of the outlet opening 6. In this constellation, although a jet effect of the beam shaping means 7 can not be achieved, the function of the jet molding agent 7 as a spacer 10 for carrying. The cooling air flows into a gap 22 which is formed between a spacer edge 14 (see FIG. 3) and an outlet edge 15 by a corresponding spacing of the cooling material 3 in front of an inner side 13 of the cooling space. The inside 13 of the refrigerator compartment 2 is located at a rear side of the refrigerator compartment 2, that is, at the side opposite to a door (not shown) of the refrigerator compartment 2. The goods to be cooled 3 stand on a support grid 20, which is permeable to the cooling air 5, so that despite adjustment lens the outlet opening 6 is an inflow of the cooling air 5 without a significant increase in the flow resistance is possible. The beam-shaping means 7 has on its upper inner side a curvature 11, along which the cooling air 5 flows. The curvature has a radius of 3 cm and, via its nozzle effect, leads to a flow reaching far into the interior of the cooling space 2, provided that no goods to be cooled 3 are in the way of obstruction.

With the beam concentration property or beam focusing property of the beam shaping means, a flow of the cooling air deep into the cooling space is effected, even if refrigerated goods are located at a certain distance, since the beam concentration permits a comparatively good reflection or deflection of the flow through the refrigerated goods is, so that the cooling air reaches more remote areas in the refrigerator 2. Advantageously, the speed of the cooling air at a distance of 20 cm from the outlet opening decreases by less than 50%, in particular less than 30%, preferably less than 15%, from the speed with which the cooling air 5 exits the outlet opening 6.

The beam-shaping means 7 is advantageously secured by means of locking elements 17 on the inner side 13 of the cooling space 2, wherein additional adhesive surfaces 16 provide further support. The locking elements 17 may be formed as locking lugs, which can be clipped into corresponding receptacles (not shown) on the inner side 13. The channel 4 extends at a rear side 19 of the cooling space 2 and the cooling air 5 is introduced into the cooling space 2 via a plurality of outlet openings 6. The buckle 11 forms a tapering section 8, which constitutes a nozzle element 18. FIG. 2 shows a detail of a cooling device 1 according to the invention from the front with supporting grates 20 for receiving refrigerated goods (not shown). The cooling space 2 has a plurality of outlet openings 6, on which a beam-shaping means 7 is arranged. The jet-forming means 7 has a nozzle element 18, through which the cooling air 5 is injected far into the interior of the cooling space 2. The beam shaping means 7 has a length L which is greater than a width B of the channel 4. The length of the beam-shaping means extends over approximately 70% of the width of the cooling space 2, which is bounded by side walls 21.

Fig. 3 shows the jet-forming means 7 of Fig. 2 in a sectional view from the side and has a height H which is greater than the height of an outlet opening 6. The jet-forming means 7 comprises a nozzle member 18 which includes a buckle 11 which achieved a nozzle effect. The curvature 11 has a radius R of 30 mm. The beam-shaping means 7 can be fixed by means of locking elements 17. The beam shaping means 7 is formed by a tapering section 8, which has a reduction of the cross section 9 of the channel 4 by 25%. A spacer edge 14 and an outlet edge 15 effect a spacer function, so that cooling air 5 can emerge even when refrigerated goods 3 are arranged immediately in front of an outlet opening 6. The distance edge 14 projects with a projection X over the exit edge 15, so that leakage of cooling air 5 is possible even with presented refrigerated goods 3. The height H of the beam-shaping means 7 is higher than that of the outlet opening 6.

The invention relates to a cooling device 1 with circulating air cooling comprising at least one cooling space 2 for receiving refrigerated goods 4, at least one channel 4 for Cooling air 5, and a cold generator 12 for generating cooling air 5, wherein the channel 4 fluidly connects the cold generator 12 with the cooling chamber 2 and opens with an outlet opening in the cooling chamber 2, wherein a jet-forming means 7 is provided and wherein the jet-forming means 7 through a nozzle member 18 and / or by a spacer 10 at the outlet opening 6, through which the refrigerated goods 4 is kept at a distance from the outlet opening 6, is formed. The invention enables a uniform, precise and energy-saving temperature control of the cooling product 3 in the cooling space 2.

LIST OF REFERENCE NUMBERS

1 refrigerator 2 refrigerator

3 refrigerated goods

4 channel

5 cooling air

6 outlet opening 7 jet forming agent

8 Rejuvenation section

9 cross section

10 spacers

11 vault 12 cold generator

13 Inside the refrigerator 2

14 distance edge

15 exit edge

16 adhesive surfaces 17 locking elements

18 nozzle element 19 side of the refrigerator 2

20 supporting grid

21 side wall of the refrigerator 2

22 space

R radius

L length of the beam shaping means 7

B width B of the channel 4

H height of the jet-forming agent 7 X supernatant

Claims

claims

1. cooling unit (1) with recirculation cooling comprising at least one cooling chamber (2) for receiving refrigerated goods (4), at least one channel (4) for cooling air (5), and a refrigeration generator (12) for generating cooling air (5), wherein the channel (4) connects the refrigeration generator (12) to the cooling space (2) in a fluid-conducting manner and opens into the cooling space (2) with an outlet opening (6), characterized by a beam-shaping means (7), the beam-shaping means (7) passing through a nozzle element (18) and / or by a spacer (10) at the outlet opening (6) through which the refrigerated goods (4) is kept at a distance from the outlet opening (6) is formed.

2. Cooling device (1) according to claim 1, characterized in that the beam-shaping means (7) by a tapering section (8) in the outlet opening (6) is formed, through which a cross-section (9) of the channel (4) in the outlet opening ( 6) is reduced substantially smoothly towards the cooling space (2), wherein in particular the cross section (9) of the channel (4) is reduced by at least 20%, preferably by at least 30%, particularly preferably by at least 40%.

3. Cooling appliance (1) according to claim 1 or 2, characterized in that the beam-shaping means (7) has a curvature (11) along which the cooling air (5) is introduced into the cooling space (2).

4. cooling device (1) according to claim 3, characterized in that the radius (R) of the curvature (11) at least 5 mm, in particular at least 10 mm, preferably at least 20 mm, more preferably at least 30mm, and / or less than 200 mm, in particular less than 100 mm, preferably less than 50 mm.

5. Cooling appliance (1) according to one of the preceding claims, characterized in that the beam forming means (7) with a projection (X) of at least 10 mm, in particular at least 15 mm, preferably at least 20 mm, in the cooling chamber (2) extends into it ,

6. Cooling device (1) according to any one of the preceding claims, characterized in that the beam-shaping means (7) by a with respect to the outlet opening (6) arranged above the spacer edge (14) is formed over a with respect to the outlet opening (6). below arranged outlet edge (15) of the outlet opening (6) protrudes.

7. Refrigerator (1) according to one of the preceding claims, characterized in that the beam-forming means (7) on an inner side (13) of the cooling space (2) is provided.

8. Cooling appliance (1) according to one of the preceding claims, characterized in that the beam-shaping means (7) is arranged substantially above the outlet opening (6).

9. cooling device (1) according to one of the preceding claims, characterized in that the beam shaping means (7) wider than the width (B) of the channel (4) and / or the height (H) slightly larger than the outlet opening (6) of the Channel (4) is.

10. The cooling device (1) according to claim 9, characterized in that the beam-shaping means (7) over at least one third of the inner width of the cooling space (2), in particular over at least half of the inner width of the cooling space (2), preferably over the entire inner width of the refrigerator compartment (2).

11. The refrigerator (1) according to any one of the preceding claims, characterized in that the beam shaping means (7) on an inner side (13) of the cooling space (2) can be placed.

12. The cooling device (1) according to any one of the preceding claims, characterized in that the beam shaping means (7) adhesive surfaces (16) and / or latching elements (17), with which it on an inner side (13) of the cooling space (2) can be fastened ,

13. The refrigerator (1) according to any one of the preceding claims, characterized in that the channel (4) on one side (19) of the cooling space (2) is guided along and angled out into the cooling chamber (2).

14. Cooling device (1) according to one of the preceding claims, characterized in that the beam-shaping means (7) is produced by injection molding.