EP3701204A1 - Kältegerät mit vertikal luftdurchströmtem verdampfer - Google Patents
Kältegerät mit vertikal luftdurchströmtem verdampferInfo
- Publication number
- EP3701204A1 EP3701204A1 EP18786304.8A EP18786304A EP3701204A1 EP 3701204 A1 EP3701204 A1 EP 3701204A1 EP 18786304 A EP18786304 A EP 18786304A EP 3701204 A1 EP3701204 A1 EP 3701204A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- evaporator
- refrigerating appliance
- appliance according
- chamber
- inlet volume
- 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
- 238000005192 partition Methods 0.000 claims abstract description 39
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims 1
- 238000009833 condensation Methods 0.000 claims 1
- 238000010257 thawing Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 11
- 238000005057 refrigeration Methods 0.000 description 10
- 238000009826 distribution Methods 0.000 description 7
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 5
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 5
- 241000446313 Lamella Species 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/04—Preventing the formation of frost or condensate
-
- 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
-
- 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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
-
- 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
- F25D2317/063—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 with air guides
-
- 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
- F25D2317/065—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 air return
Definitions
- the present invention relates to a refrigeration appliance, in particular a household refrigeration appliance, with a housing in which a plurality of storage chambers, in particular storage chambers for different operating temperatures such as a freezer compartment and a normal refrigeration compartment, are housed.
- Such household refrigerators are often designed as full no-frost devices.
- the individual storage chambers are cooled by a common finned evaporator, which is housed in a mostly divided from the coldest storage chamber evaporator chamber.
- a common finned evaporator which is housed in a mostly divided from the coldest storage chamber evaporator chamber.
- moisture entrained in the air settles on the fins of the evaporator to form a frost layer which impedes the heat exchange between the fins and the circulating air and obstructs the passageways between them narrows the fins of the evaporator, thereby making the air circulation difficult.
- the frost layer must therefore be defrosted regularly.
- DE 10 2014 218 41 1 A1 has proposed a refrigerating appliance with an evaporator arranged in an evaporator chamber and at least two storage chambers cooled by exchanging air with the evaporator chamber, in which the inlet chamber of the evaporator chamber is kept free in front of an inflow side of the evaporator a guide rib extending from one of the upstream side wall on the upstream side and open out exhaust ducts of the two storage chambers on different sides of the guide rib in the inlet volume.
- a guide rib extending from one of the upstream side wall on the upstream side and open out exhaust ducts of the two storage chambers on different sides of the guide rib in the inlet volume.
- An object of the invention is therefore to develop a refrigeration device in NoFrost type with vertically flowed evaporator so that the time interval between two defrosts can be made long and a fast, energy efficient
- the object is achieved by providing in a refrigerator with a arranged in an evaporator chamber, from bottom to top flowed evaporator and at least a first and a second cooled by air exchange with the evaporator chamber storage chamber, wherein in the evaporator chamber under a lower upstream side of the evaporator, an elongated inlet volume is kept open and exhaust ducts of the two storage chambers on different sides of a longitudinally extending through the inlet volume level into the inlet volume, an in-plane partition projecting from the lower upstream side into the inlet volume.
- the partition wall forces a propagation of the incoming air via the exhaust air lines over the entire length of the inflow side and thereby also a substantially uniform in the longitudinal direction of the inlet volume distribution of the deposited of this air in the evaporator frost. Rapid freezing of a portion of the evaporator which is heavily exposed to the inflow of air is thus avoided, and a large amount of frost may collect in the evaporator before its flow resistance necessitates defrosting.
- the uniform distribution of the frost also has the consequence that when towards the end of a defrosting the evaporator has iced and ice-free areas, the heat absorbed by an ice-free area in the evaporator must flow only a short distance until it reaches an even iced area.
- Slats of the evaporator are preferably oriented transversely to the partition, so that a gap between two slats can receive air from both exhaust ducts.
- the air flowing through in an intermediate space between two lamellae can escape the frost condensed in the interstice for a long time without having to leave the intermediate space, so that a low flow resistance of the evaporator is maintained for a long time even with the formation of frost.
- a lower edge of the dividing wall should be spaced from the bottom of the inlet volume within the inlet volume so as not to completely obstruct the two portions of the inlet volume and, if the lower inflow side is substantially clogged with frost on one side of the dividing wall, evade the air flowing on that side to allow then possibly not yet clogged remainder of the lower inflow side on the other side of the partition.
- the partition may be anchored to the evaporator to be inserted together with this as a single assembly in the refrigerator.
- Individual fins of the evaporator can project below the inflow side downwards. These slats can serve as a holder for a defrost heater. Between them may also extend the partition.
- the evaporator chamber and the first storage chamber can be arranged at substantially the same height and separated from each other by a vertical partition.
- the exhaust duct of the first storage chamber can open into the intake volume via a horizontally elongated gap.
- This gap should extend over at least 90% of the width of the evaporator; In particular, it can extend over the entire width of an inner container, in the evaporator chamber and the first storage chamber are housed together and separated from each other by the vertical partition wall.
- the gap should extend above a lower edge of the dividing wall, so that air flowing in through the gap can reach a side of the dividing wall facing away from the gap only after deflection on the dividing wall and therefore for the most part via a part of the lower part extending between the dividing wall and the vertical dividing wall
- the inflow side enters the evaporator.
- the evaporator may further have a lateral inflow surface, and the exhaust duct of the second storage chamber may open into the intake volume via an air space adjacent to the lateral inflow surface.
- the intake volume can accommodate a defrost heater.
- the defrost heater In order to act on the evaporator over the entire inflow side, the defrost heater should extend on both sides of the partition wall.
- a dew water collecting channel should run below the lower inflow side.
- a fan may be provided to simultaneously drive air exchange with both storage chambers.
- Length and passage cross-sections of lines connecting the evaporator chamber with the first and the second storage chamber can be designed according to the average refrigeration demand of the two storage chambers so that when one of the two storage chambers is sufficiently supplied with cold air from the evaporator chamber, the other is oversupplied. Then one flap in the supply or exhaust air line of the other storage chamber is sufficient to be able to supply both storage chambers as required.
- the first storage chamber generally has a lower operating temperature than the second storage chamber, and accordingly a larger proportion of the
- the air exchange with the first Storage chamber be stronger than the second. This allows the cross section of the
- Fig. 2 is an enlarged detail of Fig. 1;
- Fig. 3 is a perspective view of the evaporator of the refrigerator of Fig. 1 and various embodiments of a partition wall.
- Fig. 1 shows a NoFrost combination refrigerator in a schematic section in the depth direction.
- a body 1 of the refrigeration device two cavities are limited by one-piece deep-drawn inner container 2 in a customary manner of plastic.
- One of the cavities is a storage chamber, here a normal cooling compartment 3.
- the other cavity is divided by a vertical partition 4 in a second storage chamber, here a freezer compartment 5, and an evaporator chamber 6.
- the evaporator chamber 6 contains a fin evaporator 7 with slats arranged parallel to the cutting plane. Below the finned evaporator 7, an inlet volume 8 of the evaporator chamber 6 extends over the entire width of the lower inner container 2. A lower edge 9 of the intermediate wall 4 and the top of a step 10 of the inner container 2 define an entrance slit 1 1 of the evaporator chamber 6.
- the stage 10 and a the contour of the step 10 at a constant distance following wall 12 limit an exhaust duct 13 of the freezer compartment 5, sucked through the air in the freezer compartment 5 near the bottom and the evaporator chamber 6 is supplied.
- the entrance slit 1 1 extends as the inlet volume over the entire width of the lower inner container 2 to supply the exhaust air of the freezer to the evaporator 7 evenly distributed over the width thereof.
- Adjoining the inlet volume 8 below the evaporator 7 is an air space 14 which is delimited by a bulge of the lower inner container 2 which engages in the insulating material layer 15 of the body 1.
- the air space 14 extends along a side facing away from the freezer compartment 5 broad side of the evaporator 7 over a part, preferably not more than half, of its height.
- a (outside the cutting plane, for example, in a side wall of the body 1 extending and therefore indicated in Fig. 1 by dashed lines) exhaust pipe 15 of the normal cooling compartment 5 opens via a cut into the bulge of the lower inner container 2 opening into the air space 14.
- the spaces between the slats of the evaporator 7 are open to the air space 14 both along a lower inflow side 17 to the intake volume 8 and via a lateral inflow surface 18.
- the vertical intermediate wall 4 contains a distribution chamber 19, which communicates via an opening, on which a fan 20 is arranged, with a free space 21 of the evaporator chamber 6 above the evaporator 7.
- An outlet 22 of the distribution chamber opens into the freezer compartment 5 close to the ceiling.
- Another outlet is formed by a line 23 extending in a wall of the body 1 to the normal refrigeration compartment 3.
- a controlled by a thermostat flap 24 may be provided, which allows to suppress the cold air supply to the normal refrigeration compartment 3, when there is only 5 cooling demand in the freezer compartment. If there is a need for cooling in the normal cooling compartment 5 and the flap 24 is therefore open, the cold air circulated by the fan 20 is distributed to both storage chambers 3, 5.
- the exhaust air line 15 can lead into the inflow surface 18 of the evaporator 7 opposite or on a narrow side of the air space 14; In both cases, the exhaust air of the normal cooling compartment tends to enter in the immediate vicinity of the confluence in the evaporator 7 and there to separate the entrained moisture. If this occurs along the entire exposed edge of a blade interspace, along the inflow surface 18 and the lower inflow side 17, then the exhaust air of the normal cooling compartment in the evaporator chamber 6 Traverse detours so that the division of the recirculated air on the normal refrigerated compartment 3 and freezer compartment 5 shifts to the disadvantage of the normal refrigeration compartment 3.
- the flow resistance of the evaporator 7 increases, so that either the total air flow decreases or a higher power of the fan 20 is required to keep the air flow constant. In both cases, however, the cooling capacity of the evaporator 7 decreases. In order to maintain a good energy efficiency of the refrigerator, the evaporator 7 must therefore be defrosted.
- a partition wall 25 is mounted in the intake volume 8.
- An enlarged view of the evaporator chamber 6 with the partition wall 25 is shown in Fig. 2.
- the section through the evaporator 7 shows one of its fins 26 in plan view. Its lower edge as well as that of a multiplicity of other, identically shaped lamellae defines the lower inflow side 17.
- a slot 28 is recessed, in which a hairpin-shaped bent defrost heater 29 is inserted.
- the top of the step 10 forms immediately below the evaporator, a groove 30 and rises from the channel 30 to the freezer compartment 5 out, so that the entrance slit 1 1 significantly higher than the bottom of the Channel 30 runs.
- a lower edge 31 of the partition 25 is lower than the entrance slit 1 1, so that in the exhaust duct 13 before reaching the entrance slit 1 1 horizontally guided exhaust air of the freezer compartment 5 bounces against the partition wall 25 and is deflected at this. Due to the outgoing from the fan 20 suction, the exhaust air flows substantially in front of the partition wall 25 upwards and passes through the lower inflow side 17 in the inlet gap 1 1 facing front part.
- the partition 25 prevents penetration of the relatively humid exhaust air of the normal cooling compartment 3 from the air space 14 into the front part of the inflow side 17, thus delaying the formation of frost there. Instead, it forces the exhaust air of the normal cooling compartment 3 to dodge sideways and spread over the width of the evaporator 7 in the rear part of the inflow side 17 and thus also to achieve blade interspaces. not adjacent to the air space 14.
- frost forms in these spaces, the capacity of the evaporator 7 for frost is better utilized, and the time to defrost is increased.
- the dividing wall 25 By diverting the exhaust air of the normal refrigerating compartment 3 in the width direction of the evaporator 7, the dividing wall 25 also effects an improved match of the frost distribution with the power distribution of the defrosting heater 29 extending across the entire width of the evaporator 29. Temperature gradients that occur inside the evaporator 7 during defrosting As a result of this, some parts of the evaporator 7 become ice-free earlier than others and can therefore be warmed to temperatures above 0 ° C., therefore remain low, which improves the energy efficiency of the defrosting process.
- the partition wall 25 is due to their placement between the legs of the defrost heater 29 exposed to a great extent from outgoing heat radiation and in particular captures a portion of the radiation that would have hit the inner container 2 or the intermediate wall 4 in the absence of the partition 25 and would have heated them without to promote the defrost process.
- the partition wall 25 absorbs and heats up this radiation, it can either release the heat to the air of the inlet volume 8 and thus intensify the supply of heat to the upstream side 17, or it can transfer the heat directly into the air by physical contact with the fins 26 Initiate evaporator 7.
- Fig. 3 shows a perspective view of the evaporator 7 and several embodiments of a mating partition, here denoted by 25a, 25b and 25c, respectively.
- the partition wall 25a is a simple planar blank made of flat material, eg a spring steel, an aluminum sheet or the like.
- projections 33 are formed, which are provided to intervene between the legs of the defrost heater 29 in the slots 28 of the fins 27 and thus to anchor the partition 25 a below the evaporator 7. In order to insert the projections 33 in the slots 28, it is sufficient to slightly bend the partition 25a.
- the slots 28, as exemplified on the right narrow side 32, can be provided on the top and bottom with notches 34, in which upper and lower edges of the projections 33 can lock.
- the partition 25b is also a blank of flat material. From the plane of the blank a plurality of pairs of spring arms 35 are deflected, which diverge in the installation orientation shown in Fig. 3 upwards and at the ends of which in each case on the legs of the defrost heaters attacking sheets 36 are formed. Insertion slopes 37 above the arches 36 facilitate the insertion of the partition 25b between the legs of the defrost heater 29 and the latching on the legs.
- notches 39 are distributed in an upper edge 38 of the partition wall 25c such that each of them receives the lower edge of a lamella 26.
- the straight top edges 38 of the partitions 25a or 25b could each engage in notches on the bottom edges of the blades 26; such notches could also contribute to locking the partition wall 25a or 25b in an upright position on the evaporator 7.
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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017219162.7A DE102017219162A1 (de) | 2017-10-25 | 2017-10-25 | Kältegerät mit vertikal durchströmtem Verdampfer |
PCT/EP2018/077824 WO2019081221A1 (de) | 2017-10-25 | 2018-10-12 | Kältegerät mit vertikal luftdurchströmtem verdampfer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3701204A1 true EP3701204A1 (de) | 2020-09-02 |
EP3701204B1 EP3701204B1 (de) | 2023-08-02 |
Family
ID=63857938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18786304.8A Active EP3701204B1 (de) | 2017-10-25 | 2018-10-12 | Kältegerät mit vertikal luftdurchströmtem verdampfer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3701204B1 (de) |
CN (1) | CN111263874A (de) |
DE (1) | DE102017219162A1 (de) |
PL (1) | PL3701204T3 (de) |
WO (1) | WO2019081221A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020006408A1 (de) | 2020-10-19 | 2022-04-21 | Truma Gerätetechnik GmbH & Co. KG | Klimaanlage |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS645076U (de) * | 1987-06-26 | 1989-01-12 | ||
JPH11304335A (ja) * | 1998-04-20 | 1999-11-05 | Fujitsu General Ltd | 電気冷蔵庫 |
IT1391479B1 (it) * | 2008-07-15 | 2011-12-23 | Indesit Co Spa | Apparecchio di refrigerazione di uso domestico, in particolare del tipo no-frost |
DE102014218411A1 (de) * | 2014-09-15 | 2016-03-17 | BSH Hausgeräte GmbH | Kältegerät mit mehreren Lagerkammern |
CN106482438A (zh) * | 2016-11-23 | 2017-03-08 | 合肥华凌股份有限公司 | 双开门冰箱 |
-
2017
- 2017-10-25 DE DE102017219162.7A patent/DE102017219162A1/de active Pending
-
2018
- 2018-10-12 PL PL18786304.8T patent/PL3701204T3/pl unknown
- 2018-10-12 EP EP18786304.8A patent/EP3701204B1/de active Active
- 2018-10-12 WO PCT/EP2018/077824 patent/WO2019081221A1/de unknown
- 2018-10-12 CN CN201880069389.1A patent/CN111263874A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102017219162A1 (de) | 2019-04-25 |
PL3701204T3 (pl) | 2024-01-08 |
CN111263874A (zh) | 2020-06-09 |
EP3701204B1 (de) | 2023-08-02 |
WO2019081221A1 (de) | 2019-05-02 |
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