EP2691710A2 - Kältegerät mit ventilator - Google Patents
Kältegerät mit ventilatorInfo
- Publication number
- EP2691710A2 EP2691710A2 EP12709613.9A EP12709613A EP2691710A2 EP 2691710 A2 EP2691710 A2 EP 2691710A2 EP 12709613 A EP12709613 A EP 12709613A EP 2691710 A2 EP2691710 A2 EP 2691710A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- pressure chamber
- air
- air pressure
- refrigerating appliance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
- F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
- F25D2317/0681—Details thereof
Definitions
- the invention relates to a refrigeration device with a fan.
- a refrigeration device with a fan In conventional refrigeration appliances with forced convection, an air flow is generated by a fan in the interior of the refrigerator, for example in a cold room, which has an inhomogeneous flow velocity due to dynamic components in the air flow.
- dynamic components usually can not be fully utilized in the refrigeration appliance, but only lead to a slight increase in the pressure jump of the flow generated by the fan.
- the unused kinetic energy of the dynamic components to an unwanted
- Air speeds can lead. These uneven air velocities, for example, result in an inhomogeneous temperature distribution in the refrigeration appliance. Furthermore, it is possible that resonances and excitations of the air ducts and a fan housing are generated by the inhomogeneous flow through the air ducts.
- such a conventional fan housing is used to separate the air flow of the fan into several parts, for example for several subjects to be supplied or areas in the refrigerator. Again, it may be due to the dynamic, kinetic components of the air flow to those already mentioned
- Vibration excitations of the housing come.
- the resulting noise accordingly reduces the efficiency of the fan in the refrigerator.
- the invention relates to a refrigeration device with a fan.
- the fan is arranged in an air pressure chamber.
- air pressure chamber By the air pressure chamber, air currents that are generated by the fan in the air pressure chamber, compensate, so that dynamic portions of the air flow in a uniform total pressure in the air pressure chamber rise and thus creates a homogeneous pressure or a homogeneous air flow. This makes it possible that at appropriate locations of the boundaries, such as walls of the pressure chamber, with respect to the
- Air velocity homogeneous airflow can be tapped.
- the homogeneous air flow noise is reduced by the fan, in particular by excitation of air ducts or other components of the refrigerator.
- the air pressure chamber has a corresponding volume, which supports the formation of the homogeneous air flow and the absorption of dynamic components in the air flow.
- the fan is enclosed by the air pressure chamber, for example, in particular completely enclosed. As a result, the air flow, which is generated by the fan on the pressure side, only spread in the air pressure chamber.
- the fan may for example have a free-running impeller. This allows the fan to be manufactured with less effort.
- the fan is for example as
- the air pressure chamber has an inlet opening for supplying air to the fan and at least one outlet opening for discharging air from the air pressure chamber. Accordingly, in particular, air can only reach the air pressure chamber through the inflow opening. For example, the air of the air pressure chamber can be fed exclusively via the fan. Furthermore, air, the air pressure chamber, for example, only in the form of the fan generated
- the fan is so with respect to
- Inlet opening arranged so that a pressure side of the fan is separated from a suction side of the fan. This further supports the fact that air can get into the air pressure chamber other than through the fan.
- the fan is arranged above and / or inside the inflow opening.
- the fan is positioned in the interior of the air pressure chamber above the inflow opening that a
- the inlet opening in particular completely covered.
- the fan can also protrude into the inflow opening.
- the inflow opening is arranged on one side of the air pressure chamber, extending in extension of a rotation axis of the
- the inflow opening is a circular opening in the side or the wall of the air pressure chamber, wherein the axis of rotation of the fan extends centrally through the inflow opening.
- the at least one outflow opening is arranged radially to a rotation axis of the fan or an extension of the rotation axis.
- the at least one outflow opening is arranged in a side which lies in the direction of the air flow generated by the fan.
- the outflow opening is removed, for example, from the
- Rotation axis or the extension of the rotation axis arranged.
- an air duct is connected to the at least one outflow opening.
- the air duct is used for example for forwarding the air flow to one or more areas in the refrigeration device, which are arranged in particular away from the fan or the air pressure chamber.
- the air duct for example, at least one opening to a cooling space of the refrigerator.
- the refrigeration appliance it is also possible for the refrigeration appliance to have a plurality of, in particular independent, refrigerating chambers which are supplied with the airflow generated by the fan via corresponding openings in the air duct.
- the air pressure chamber has two, in particular exactly two, outflow openings. The two outflow openings are located
- the air flow generated by the fan is evenly distributed to the two outflow openings.
- the air flow generated by the fan is evenly distributed to the two outflow openings.
- the air pressure chamber has a first leg and a second leg. At the end of the first leg is one of the two outflow openings, and at the end of the second leg, the other of the two outflow openings is arranged.
- the first leg and / or the second leg extend past the axis of rotation of the fan.
- the air pressure chamber is shaped such that an angled or curved or S-shaped connection between the two outflow openings is present.
- the first and second legs may be parallel to each other. The described leg arrangement allows flexible positioning of the
- the air pressure chamber is shaped such that a discharge of the air from the at least one outflow opening takes place with a homogeneous or nearly homogeneous flow. This is achieved for example by suitable choice of the volume of the air pressure chamber and the shape of the air pressure chamber.
- one side of the air pressure chamber is formed by a wall, in particular a rear wall, of a cooling space of the refrigeration device.
- the air pressure chamber can be provided with reduced material expenditure in the refrigeration device.
- the fan is held by a fan holder attached to said wall of the cold room.
- the fan is bolted to the wall of the refrigerator, for example.
- an air supply to the fan is provided, which has an obstruction of less than 20%, in particular less than 10%, of an inlet surface of the fan.
- Air supply to the fan symmetrical, so without obstruction.
- the efficiency of the fan is only slightly reduced if there is an asymmetrical obstruction of the air supply to the fan and less than 20% of the total feed area, preferably less than 10% of this area.
- Installation conditions of the air pressure chamber can be used.
- the air pressure chamber at least partially rounded outer walls.
- rounding can be provided in areas of the air pressure chamber, which would form a corner or edge without the rounding.
- dead water areas can arise, which are prevented by the rounding. This is particularly advantageous in air pressure chambers with low volume.
- a refrigeration device Under a refrigeration device is in particular a household refrigeration appliance understood, ie a refrigeration appliance for household management in households or possibly in the Catering area is used, and in particular serves to store food and / or drinks in household quantities at certain temperatures, such as a refrigerator, a freezer, a fridge-freezer, a freezer or a wine storage cabinet.
- FIG. 2 different views of an embodiment of an air pressure chamber with a centrifugal fan, various views of an embodiment of an air pressure chamber with an axial fan, schematic views of various embodiments of a
- Air pressure chamber schematic views of various other embodiments of an air pressure chamber, a schematic view of another embodiment of a
- Air pressure chamber and schematic views of various other embodiments of an air pressure chamber.
- FIG. 1 shows an embodiment of a refrigeration device 1 with a housing 3, in which a lower cooling area 5 and an upper cooling area 7 are provided.
- the cooling areas 5 and 7 are separated from each other by a partition 9.
- the partition 9 has an insulation, so that in the upper cooling region 7, a different temperature level than in the lower cooling region 5 can be adjusted.
- shelves 11, 13 are provided, which the cooling area 5 in
- an evaporator or heat exchanger 17 is provided, via which the cooling areas 5, 7 is withdrawn for cooling temperature.
- an air pressure chamber 19 is provided on the rear wall 15, in which a fan 20 is located.
- the fan is for example a radial fan or an axial fan. In alternative embodiments, the fan 20 may also be designed as a tangential fan.
- the fan 20 and the air pressure chamber 9 is supplied via an inlet 21 air from the cooling area 5.
- the inlet opening 21 is the only possible air supply for the air pressure chamber 19, wherein the air is sucked in through the inlet opening 21 by the fan 20 and is distributed with increased pressure in the air pressure chamber 19.
- the air pressure chamber 19 also has a first outflow opening 23 and a second outflow opening 25, via which in each case an air flow can escape from the air pressure chamber 19, which is generated by the fan 20.
- an air outlet is provided, via which the air flow in the lower region of
- Cooling area 5 can get.
- an air channel 27 is connected, which air outlets 29, 31 has.
- a second air duct 33 is provided, via which air can flow from the cooling area 7 to the evaporator 17.
- the fan 20 is completely enclosed by the air pressure chamber 19. Through the single inlet opening 21 for supplying air to the fan 20 and the two
- Outlet openings 23, 25, which form the only air outlets of the air pressure chamber 19, is achieved that dynamic components in the air flow, which is generated by the fan 20, are compensated within the air pressure chamber 19 and a homogeneous air flow at the outflow openings 23, 25 are discharged can.
- Air flow in particular at the air outlets 29, 31 is formed. Furthermore, it comes through the no longer existing dynamic components in the air streams to lower
- the inflow opening 21 is in extension of a rotation axis of the fan 20.
- the outflow openings 23, 25 are arranged radially to the axis of rotation or to an extension of the axis of rotation.
- the outflow openings 23, 25 are opposite.
- the illustrated arrangement of the inflow opening 21 with respect to the axis of rotation allows a symmetrical air supply to the fan 20.
- Fig. 2 shows an embodiment of an air pressure chamber 19, wherein in Fig. 2a is a sectional view of the air pressure chamber 19 and in Fig. 2b is a plan view of
- Air pressure chamber 19 is shown. It can be seen here that the air pressure chamber 19 is designed, for example, round, in particular circular.
- the air pressure chamber 19 is formed in this embodiment on a wall 34 of the refrigeration device 1, so that this wall 34 forms one side of the air pressure chamber 19.
- On the wall 34 is a
- Screwed fan holder 35 which holds the fan 20 designed as a radial fan.
- the fan 20 is arranged directly above the inflow opening 21, so that air can enter the air pressure space 19 only via the inflow opening 21 and the fan 20.
- Fig. 2b it will be seen that dynamic
- Air flows which are generated by the fan 20 in operation, can compensate within the volume of the air pressure chamber 19 and so on the
- Outflow openings 23, 25 can be discharged as a homogeneous air flow. This results in a discharge of the air from the air pressure chamber 19 with a homogeneous or almost homogeneous flow through the outflow openings 23, 25th
- FIG. 3 shows a further exemplary embodiment of an air pressure chamber 19 with a fan 20 arranged therein, wherein FIG. 3 a shows a sectional view and FIG. 3 b shows a top view of the air pressure chamber 19.
- the fan 20 in Fig. 3 as an axial fan
- the axial fan 20 is attached via a fan holder 35 to a wall 34.
- the air pressure chamber 19 has in this embodiment a specially shaped inflow opening 21, within which the axial fan 20 can rotate. Thus, in turn, it is ensured that supplying air to the air pressure chamber 19 only can be done via the inlet opening 21 and the fan 20.
- An outflow or discharge of air from the air pressure chamber 19 is carried out as in Fig. 2 on the
- the air pressure chamber 19 is also designed in this embodiment such that the air can be removed as a homogeneous air flow from the air pressure chamber 19.
- FIG. 4 shows various embodiments of air pressure chambers in schematic representations, wherein in Figs. 4a, 4b and 4c each have different widths
- Air pressure chambers are in FIGS. 4a, 4b and 4c respectively linearly opposite.
- 4a shows an air pressure chamber 19 with a greatest width b1
- FIG. 4b an air pressure chamber 19 with a mean width b2
- FIG. 4c an air pressure chamber 19 with a small width b3.
- Air flow can be achieved at the top and bottom of the air pressure chambers 19 without suffering appreciable efficiency losses. Despite the smallest width b3, however, the highest pressure jump in the air flow is achieved with the arrangement in FIG. 4c.
- FIGS. 5a, 5b and 5c each have a first leg 39 and a second leg 41, which run at least partially offset parallel to each other and differ in the width of the legs.
- the legs 39, 41 have the same width b4.
- One direction of rotation of the fan 20, here in the counterclockwise direction, is chosen such that the air flow generated by the fan 20 can flow directly along the respective leg 39, 41.
- an adequate pressure jump for the outflowing air can be generated in an efficient manner.
- the second leg 41 is narrower than the first leg 39 with the width b5.
- the narrowing of the obstructed second leg 41 a direct air flow of the fan 20 to the outflow opening on the leg 41, so that the pressure jump achieved is slightly smaller than in the embodiment of Fig. 5a.
- the first leg 39 extends with the width b5 central to the axis of rotation of the fan 20, while the second leg 41 is narrowed. This results in a slightly lower pressure jump than in the embodiments of FIGS. 5a and 5b.
- the pressure chamber 19 is formed in each case with right-angled corners. With smaller dimensions of the air pressure chamber 19, condensation may accumulate in these corners, which reduces the efficiency of the air flow. Such condensation in the corners can also be referred to as formation of dead water areas. To counteract this effect, the corners can also be rounded, as shown for example in the embodiment of the air pressure chamber 19 in Fig. 6.
- the embodiment of Fig. 6 is similar to the embodiment of Fig. 5b, particularly with respect to the widths of the legs 39, 41. However, the corners formed by the legs 39, 41 are rounded, so that the air pressure chamber 19 having at least partially rounded outer walls. The resulting pressure jump at the outflow openings is increased compared to the embodiment of FIG. 5b.
- Fig. 7 shows further embodiments of air pressure chambers 19, in which
- a different air supply is provided.
- Fig. 7a shows a completely symmetrical air supply to the fan 20, so that the fan is supplied with suction evenly air. As a result, a maximum efficient air flow on the pressure side of the fan can be generated.
- an obstruction of the entrance surface of the fan 20 of about 10% is provided. Due to the slightly asymmetric air supply to the fan 20, an air flow can still be generated by the fan 20, which has the same or only slightly reduced pressure jump compared to the
- Embodiments of FIGS. 7a and 7b are reduced but tolerable.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL12709613T PL2691710T3 (pl) | 2011-03-28 | 2012-03-14 | Urządzenie chłodzące z wentylatorem |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011006239A DE102011006239A1 (de) | 2011-03-28 | 2011-03-28 | Kältegerät mit Ventilator |
| PCT/EP2012/054476 WO2012130617A2 (de) | 2011-03-28 | 2012-03-14 | Kältegerät mit ventilator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2691710A2 true EP2691710A2 (de) | 2014-02-05 |
| EP2691710B1 EP2691710B1 (de) | 2021-05-12 |
Family
ID=45855781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12709613.9A Active EP2691710B1 (de) | 2011-03-28 | 2012-03-14 | Kältegerät mit ventilator |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2691710B1 (de) |
| DE (1) | DE102011006239A1 (de) |
| PL (1) | PL2691710T3 (de) |
| WO (1) | WO2012130617A2 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000180035A (ja) * | 1998-12-18 | 2000-06-30 | Sharp Corp | 冷蔵庫 |
| JP2001066039A (ja) * | 1999-08-25 | 2001-03-16 | Mitsubishi Electric Corp | 冷蔵庫用送風装置および該冷蔵庫用送風装置を備えた冷蔵庫 |
| JP2002161895A (ja) * | 2000-11-30 | 2002-06-07 | Sanyo Electric Co Ltd | 送風装置及びそれを用いた冷蔵庫 |
| JP2003240408A (ja) * | 2002-02-14 | 2003-08-27 | Toshiba Corp | 冷蔵庫 |
| JP2006183892A (ja) * | 2004-12-27 | 2006-07-13 | Hitachi Home & Life Solutions Inc | 冷蔵庫 |
-
2011
- 2011-03-28 DE DE102011006239A patent/DE102011006239A1/de not_active Withdrawn
-
2012
- 2012-03-14 WO PCT/EP2012/054476 patent/WO2012130617A2/de not_active Ceased
- 2012-03-14 PL PL12709613T patent/PL2691710T3/pl unknown
- 2012-03-14 EP EP12709613.9A patent/EP2691710B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012130617A3 (de) | 2013-05-10 |
| DE102011006239A1 (de) | 2012-10-04 |
| WO2012130617A2 (de) | 2012-10-04 |
| PL2691710T3 (pl) | 2021-11-22 |
| EP2691710B1 (de) | 2021-05-12 |
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