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
  • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
• • 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
  • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
  • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
  • F25D2321/146—Collecting condense or defrost water; Removing condense or defrost water characterised by the pipes or pipe connections

Definitions

• the present invention relates to a channel closure means for a Abtauwasserkanal a cooling device, in particular a NoFrost cooling device, a Abtauwasserkanal a cooling device and a cooling device, in particular a NoFrost cooling device.
• the air is supplied by means of a circulating air system in the cooling chamber to an evaporator, which is arranged in particular outside the actual cooling space. Ice forms on the evaporator.
• the evaporator thaws off regularly, the defrost water through a Abtauwasserkanal in a
• Evaporating tray is removed.
• the disadvantage is that in particular already before starting the cooling device or until the time until the siphon is filled with water, ambient air and moisture can flow through the Abtauwasserkanal in the refrigerator or to the evaporator and can freeze the evaporator.
• the object of the invention is therefore to prevent an influx of ambient air through a Abtauwasserkanal to an evaporator of a refrigerator, in particular until the water siphon is filled with condensate and performs its function.
• the object is achieved with a channel closure means for a Abtauwasserkanal a cooling device, in particular a NoFrost cooling device, wherein the
• a refrigerator according to the invention is in particular automatically defrostable and, for example, a refrigerator, a freezer or fridge-freezer or a freezer. Preferably, it is a household refrigerator.
• a no-frost Cooling device in the context of the invention is a cooling device in which the evaporator outside the cooling compartment arranged in an evaporator compartment, and the cooling air is circulated via cooling air ducts by means of a fan between evaporator compartment and cooling compartments. The evaporator of such a refrigerator can be defrosted by a defrost heater.
• the Abtauwasserkanal the cooling unit transported in the refrigerator especially on the evaporator resulting defrost water outside the refrigerator, so that the defrost water outside the refrigerator, in particular by utilizing the waste heat of a compressor, can evaporate.
• the Abtauwasserkanal is for example a pipe, a hose or a channel and preferably opens into an evaporation tray, which is advantageously arranged over the compressor.
• a siphon is preferably integrated in the Abtauwasserkanal, which fills with defrost water and then the entry of ambient air into the refrigerator or at NoFrost devices in the evaporator compartment prevented.
• a channel closure means according to the invention dissolves at least partially through contact with water, in particular through contact with defrosting water of a cooling unit.
• the sewer sealant seals the Abtauwasserkanal a cooling device by its arrangement within the siphon and / or by its formation at least largely until the siphon has filled so far with defrost water that the water level in the siphon seals the opening cross section of the siphon.
• the channel closure means is then dissolved by the contact with the defrost water, so that no ambient air and moisture can flow through the Abtauwasserkanal from the outside to the refrigerator.
• the seal does not necessarily mean a 100% air permeability, but should z. B. go so far that in a normal transport and operation of the refrigerator only a very small exchange of air between the interior of the refrigerator and the environment takes place, which does not lead to noticeably stronger icing of the evaporator.
• the channel closure means prevents a larger amount of air (for example> 10 ml) from being sucked into the interior space when the door of the cooling device is opened, thereby temporarily generating a negative pressure in the interior.
• the channel closure means contains a water-soluble material, e.g. B. organic
• channel sealant need not be made entirely of the water-soluble material, it must only be ensured that the channel sealant is in contact with water for this permeable. It is therefore conceivable that residues of the channel closure means in the
• Defrost water channel remain, provided they do not hinder the drainage of the defrost water.
• the channel closure means is permeable to air at least in the flow direction of the defrost water. This property is used by the incoming
• Defrost water displaced air from the Abtauwasserkanal escape This ensures that no air bubble forms between the defrosting water and the channel closure means in the defrosting water duct formed as a tube or hose, which could prevent the channel closure means from coming into contact with the defrosting water.
• the air permeability may e.g. be achieved by that
• Ducting agent is slightly porous, which can be achieved in particular with materials such as salt or sugar.
• the channel closure means is easily permeable to air in both directions, wherein it is preferably ensured that under the above normal conditions only a small exchange of air of z. B. 0.001 to 5 l / day, preferably 0.01-1 l / day takes place. Only through the increased pressure of pent-up Abtauwassers the air in Abtauwasserkanal air is forced through the pores of the channel closure means to the outside.
• a comparable effect as by pores can be achieved by arranging in the channel closure means a passage opening of small inner diameter which connects the regions of the defrost water channel lying upstream and downstream of the channel closure means.
• the inner diameter of the passage opening is for example 0.01 mm to 1 mm, preferably 0.05 mm to 0.5 mm.
• the air passage can be realized by a capillary tube with a corresponding diameter, which is introduced into the channel closure means.
• the channel closure means is permeable to air only in the flow direction of the defrost water.
• This includes or forms z. B. a one-way valve, in particular a poppet valve or a ball valve. It is z. B. the closure or valve body made of a water-soluble material, in particular one of the above materials.
• the valve seat is preferably not water-soluble.
• the water-soluble channel closure means is formed as a valve body of a ball valve or poppet valve. Before the closure body has dissolved, it can only lift off the valve seat in the flow direction of the defrosting water and is thus permeable to air and water in this direction. In contrast, no air can flow into the refrigerator.
• an air-permeable channel closure means may also include a membrane which is permeable to air, at least in the direction of flow of the defrosting water.
• the channel closure means may be completely formed by the membrane or have a passage opening closed by such a membrane. In the latter case, the membrane itself does not need to be water-soluble.
• the membrane is z. B. is designed so that it allows more air with increasing pressure difference, it is preferably ensured that in the resulting from the opening of the door pressure difference only little air is sucked into the interior of the refrigerator.
• the membrane is preferably designed so that the pressure of the dammed defrosting water is sufficient to allow the air in Abtauwasserkanal air to flow through the membrane to the outside.
• the channel closure means is designed as a plug or plate whose geometry to the cross section of the Abtauwasserkanals so adapted, that the Abtauwasserkanal is closable with him and that is made of any water-soluble material. Suitable examples are the above-mentioned organic or inorganic water-soluble materials such. B. starch and salt.
• a plug is, for example, held positively or non-positively in a portion of the defrost water by sealingly abuts the inner wall of the channel at its periphery.
• the plug is formed as a tab, for example as a tablet or pill, which is at least substantially made of a water-soluble organic or inorganic material.
• the tab preferably has a peripheral shape adapted to the cross section of the defrosting water channel, more preferably it is rounded, e.g. B. approximately spherical or ellipsoidal, or annular or plate-shaped.
• the plug is a gas filled bladder
• water-soluble film may be made of the above materials, for. B. strength.
• the gas is preferably air or nitrogen.
• This embodiment has the advantage that the bladder can adapt to different cross-sectional shapes of Abtauwasserkanälen and easily introduced into this and can be held in form or in particular frictionally engaged.
• the channel closure means is formed according to another embodiment as a film, in particular as a starch film.
• the film may contain any other water-soluble material, particularly the above-mentioned. Matrialien.
• the film may also have a (possibly not water-soluble) network or fabric structure whose meshes are sealed with the water-soluble material.
• an above-described air-permeable membrane can be used.
• Defrosting water which is a biological growth in the evaporation tray, in the defrost water is collected, can be placed as a countermeasure in the field of evaporation of defrost water, a biological growth inhibiting substance such. Salt or other suitable chemicals such as cationic surfactants or the like.
• the substance that prevents biological growth may also be a biocide, especially a bactericide or fungicide.
• this substance may be in a sachet or as a tablet in the
• the channel closure agent comprises the substance, the substance is activated only if the biological growth due to the dissolving channel closure agent actually has to be prevented.
• the channel closure agent comprises the substance, for example in tablet form, wherein the tablets, for example, in
• Ducting means are welded, or it is integrated in any other form in the channel closure means. If the channel sealant is a tab, the biological growth inhibiting substance is preferably compressed together with the water-soluble material into a tablet.
• the channel closure means may also have a composite structure, wherein, for example, the substance forms part of the channel closure means.
• the substance can be provided separately from the channel closure means in the defrost water channel, for example in the flow direction of the defrost water before and / or behind the channel closure means. Further, the substance may also form the channel closure means or it may be an additional channel closure means temporarily occluding the defrost water channel.
• the object is also achieved with a Abtauwasserkanal a cooling device, wherein the Abtauwasserkanal comprises a channel closure means according to the invention for closing the Abtauwasserkanals.
• Such Abtauwasserkanal is with the
• Defrost water channel are flowed through the defrost water and drain it to the outside of the refrigerator.
• the channel closure means in Abtauwasserkanal is arranged substantially transversely to the flow direction of the defrost water.
• Channel closure means substantially congruent to the internal geometry of the
• the size of the required channel closure means is therefore determined essentially by the size of the Abtauwasserkanals, so that the channel closure means is small and inexpensive apisbar.
• the Abtauwasserkanal into consideration, but are preferred a round, square or oval cross-section.
• the Abtauwasserkanal comprises a siphon.
• the siphon fills with defrost water during the first defrost cycle (s) and prevents air from getting inside the refrigerator. At the same time the defrost water can drain easily.
• the channel closure means is arranged in the flow direction of the defrost water behind the siphon. When defrosting the evaporator of the refrigerator, therefore, the siphon is first filled with defrost water. Only then does the channel closure come into contact with the water and dissolve.
• the channel closure means is arranged in the Abtauwasserkanal that it dissolves completely, for example by it comes along its entire water-facing surface with the water in contact.
• the channel closure means disposed at its lowest point approximately at the level or just above the water surface.
• the substance for preventing the biological growth is preferably additionally arranged upstream of the siphon in the direction of flow of the defrosting water so that it also acts on the water held in the siphon.
• the substance can be
• the channel closure means may also comprise the substance.
• the siphon can z. B. be designed as a tube siphon, so have a U-shaped tube, the lower bend always remains filled with condensation and thus prevents the entry of ambient air into the evaporator chamber. This training is particularly easy to manufacture.
• the siphon can also be designed as a bottle, cup, baffle or bell siphon. Particularly preferred is an arrangement in which the tube of the
• the cup is arranged in the evaporation tray, so that the condensation from the cup flows directly into this.
• a cover is arranged above the siphon, which indeed allows the overflow of water, but slows down the drying of the siphon or the cup.
• the channel closure means may be introduced at different positions and in different ways into the defrost water channel, of which some preferred embodiments are presented below:
• the film can be fixed by the end face is moistened at the outlet end of the tube, and then the film is pressed to the front side.
• the channel closure means is formed as a water-soluble film in a channel section piece which forms a part of the Abtauwasserkanals as a separate component.
• the Abtauwasserkanal is therefore not in one piece, but has a separate Kanalabintroductorys republic, z. B. a
• the channel closure means is formed as a plug, which is introduced into a tubular or tubular portion of the Abtauwasserkanals. To hold the plug frictionally here in Abtauwasserkanal, it is advantageous if the tubular or channel-shaped portion is at least slightly elastic, so z. B. a spherical tab or a gas-filled bladder can be pressed into it.
• the channel closure means is preferably formed as a plug in a channel section piece which forms a part of the Abtauwasserkanals as a separate component.
• Channel closure means may have, which is thus held form-fitting and therefore particularly strong in the channel section piece.
• the channel section piece itself may be arranged in the same manner at the outlet or inlet end of the defrost water channel As described above with respect to the channel section piece with integrated water-soluble film.
• the channel closure means is designed as a stopper provided with at least one flow opening in the defrost water channel, wherein the at least one flow opening is closed with a water-soluble film.
• the channel closure z. B. may be formed as a perforated ring which is inserted into the Abtauwasserkanal.
• a ball-like plug provided that it has at least one corresponding flow opening.
• the plug may also be arranged in the manner of a sealing ring between the outlet end of the Abtauwasserkanals and the inner wall of the cup.
• the object is also achieved with a cooling device, in particular a NoFrost cooling device, wherein the cooling device comprises a Abtauwasserkanal invention.
• a cooling device in particular a NoFrost cooling device, wherein the cooling device comprises a Abtauwasserkanal invention.
• Fig. 1 shows schematically a section of a Abtauwasserkanal a
• Fig. 2 shows schematically a Abtauwasserkanal a cooling device and connected to the Abtauwasserkanal evaporator.
• Fig. 3 shows schematically a arranged on the back of a refrigerator
• FIG. 4 shows schematically a arranged on the back of a refrigerator
• Fig. 5 shows schematically a arranged on the back of a refrigerator
• Fig. 6 shows an arrangement on the rear wall of a refrigerator with
• Fig. 7 shows an arrangement on the rear wall of a refrigerator with
• Fig. 8 shows schematically a longitudinal section through a Abtauwasserkanal a
• Cooling device with a channel closure means according to another
• Fig. 9 shows schematically a longitudinal section through a Abtauwasserkanal a
• Refrigerator with a channel closure means according to yet another
• FIG. 1 shows schematically a section of a Abtauwasserkanal 2 of a
• a channel closure means 1 is arranged in the form of a plug that closes the Abtauwasserkanal 2 against ingress of ambient air and moisture until it gets in contact with water and dissolves.
• the channel closure means 1 comprises a biological growth-preventing substance 4, here in tablet form, incorporated in the
• Channel closure means 1 integrated.
• the tablet 4 also dissolves, so that the biological growth-preventing substance together with the residues of the channel closure means 1 in the evaporation tray is rinsed where it prevents the residues from becoming a breeding ground for bacteria or the like.
• the arrows show schematically the flow direction F of the defrost water.
• the Abtauwasserkanal 2 has a substantially round cross-section, so that the channel closure means 1 a round
• Outer circumference of the channel closure means 1 corresponds to the inner circumference of
• the channel closure means 1 seals the Abtauwasserkanal 2 against against the flow direction F in the Abtauwasserkanal inflowing ambient air and moisture, so that no or only small amounts of ambient air or moisture through the Abtauwasserkanal 2 against the flow direction F to the evaporator 6 (s. Fig. 2) and can freeze it.
• Fig. 2 shows schematically a further embodiment of a Abtauwasserkanals 2 of a refrigerator and an evaporator 6 to which the Abtauwasserkanal 2 is connected.
• an evaporator 6 is arranged, for example, on the interior-side rear wall of a refrigerator, for example a refrigerator or freezer or a freezer, or for example below the compartments or drawers of a refrigerator or freezer.
• the evaporator 6 is arranged in a NoFrost device in a separately heatable evaporator chamber of the refrigerator. During operation of the refrigerator, the moisture condensed on the evaporator 6 freezes out of the
• the Abtauwasserkanal 2 has a U-shaped siphon 5.
• the channel closure means 1 is arranged so that it comes into contact with the defrost water only after filling of the siphon 5 and dissolves. Therefore, at no time
• Refrigerator is collected during defrost of the evaporator condensation in the defrost water 8 and discharged through a passage 9 from the refrigerator.
• the defrost water then flows through a designed as a pipe or hose sewer 2, the a U-shaped siphon 5 has.
• the channel closure means is formed as a water-soluble film 1a, which over the end face of the tube at the outlet end 12 of the
• Fig. 4 shows a similar arrangement as Fig. 3, wherein the channel closure means is integrated here as a film 1 b in a separate channel section piece 3a, which is inserted between the siphon 5 and a tail pipe section 14 of Abtauwasserkanals.
• the channel closure means is integrated here as a film 1 b in a separate channel section piece 3a, which is inserted between the siphon 5 and a tail pipe section 14 of Abtauwasserkanals.
• Kanalab Songsdorfs Culture 3a may in particular be attached to the pipe of the siphon and the pipe section 14 or screwed or glued to this.
• Fig. 5 that is
• Channel closure means formed as a plug in the form of a roundish tab 1c.
• the tab 1c is inserted in a simple manner from the outlet end 12 of the Abtauwasserkanals in these and frictionally held in this.
• a plug or tab 1d may also be inserted into a separate channel section 3b, as also shown in FIG.
• the channel section piece 3b shown in FIG. 5 is arranged upstream of the siphon 5 in the flow direction.
• Channel section piece 3b can also be arranged in the flow direction behind the siphon 5.
• Fig. 6 shows an arrangement in which the Abtauwasserkanal 2 is provided with a cup siphon 15. Again, a defrost water 8 through a passage 9 in the Device isolation 7 out. This is followed by a Abtauwasserkanal 2, which opens at its outlet end 16 down into a cup-like container 17.
• the cup 17 is disposed in an evaporation tray 10 and covered at the top with a cap 18 which protects the siphon 15 from drying out.
• the channel closure means is again designed as a plug 1 d, but here it is inserted in a separate channel section piece 3 b, which has an annular receptacle for the plug 1 d.
• the passage section 3b is connected between the defrost water guide 8 and the defrost water passage 2.
• FIG. 7 an arrangement of the channel closing means according to the fifth embodiment is shown.
• an annular plug 1 e is inserted between the outlet end 16 of Abtauwasserkanals 2 and the cup 17 of the siphon 15, which is, however, provided with at least one passage opening 19. This is initially sealed with a water-soluble film, which dissolves on first contact with defrost water.
• annular plug 1f without passage openings can also be provided which dissolves in water as a whole.
• a favorable position of the channel closure means 1 - here by way of example in the form of a plug - is to be shown in a siphon 5 of the defrost water channel 2.
• the evaporator 6 is again shown in Fig. 8, to which the Abtauwasserkanal 2 is connected. This has a U-shaped siphon 5 and opens into an evaporation tray 10.
• the dashed line L indicates the lowest water level at which the water safely prevents the exchange of air between the upstream and downstream sections of Abtauwasserkanals 2.
• the channel closure means 1 is arranged in the downstream portion such that its lowermost point 21 on or z. B. only a few millimeters above the line L. As a result, the channel closure means 1 is dissolved by inflowing defrost water as soon as the siphon 5 fulfills its function. This has the advantage that the channel closure means 1 possibly already dissolves after the first defrost cycle of a NoFrost device. A similar water level L can also be found in a siphon or other type of siphon. Again, the channel closure means 1 can be arranged just above this line L.
• a valve body of a one-way valve here a ball valve
• a portion 2a of Abtauwasserkanals is provided, at its lower end by a constriction, a valve seat 22 is formed.
• a spherical valve body 1g of an at least partially water-soluble material This prevents that air from the environment against the direction of flow F of the defrost water can penetrate into the interior of the refrigerator or the evaporator. The other way around, however, the air displaced by the defrosting water flowing into the siphon 5 can escape to the outside.
• the defrost water pipe 2 may also be integrally formed in this embodiment.
• the one-way valve formed by the valve seat 222 and the valve body 1g may be formed as a poppet valve or disc valve instead of a ball valve.
• the valve seat is straight and the valve body has a flat disc shape. It is understood that the embodiments of the channel closure means shown in connection with a tube siphon are also applicable to a cup siphon and vice versa.

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• 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)
• Removal Of Water From Condensation And Defrosting (AREA)
• Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
• Defrosting Systems (AREA)

Priority Applications (3)

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• 2009
  • 2009-08-24 DE DE200920011510 patent/DE202009011510U1/de not_active Expired - Lifetime
• 2010
  • 2010-08-16 CN CN2010800374546A patent/CN102483285A/zh active Pending
  • 2010-08-16 WO PCT/EP2010/061892 patent/WO2011023581A2/de active Application Filing
  • 2010-08-16 EP EP10743132.2A patent/EP2470845B1/de not_active Not-in-force
  • 2010-08-16 ES ES10743132T patent/ES2413280T3/es active Active

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