DE2023172A1 - Two-chamber refrigerator - Google Patents

Description

DR-ING. DIPL-ING. GL RIEBLINa " PATENT ADVOCATE My sign

A681-14 / io / Uim

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899 Lindau (Bodensee) Your message from My message from Rennerle 10 PO Box 365

9. lYlai 197o

ASTRO CONTROLS, Inc.,

42o1 lüest Peterson Avenue, Chicago, Illinois, 6o646 / USA

Cooking chamber refrigerator.

The present invention relates to a refrigerator, the interior of which can be divided into two chambers by a removable insulated wall, with a narrow, elongated, open passage on one side of the plate allows limited air flow between the chambers provides and each of the chambers can be a freezing chamber, while the other is a cooling chamber. with a temperature above freezing point, there is one in both chambers

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Telegraph office hours Bank account: Poitichcckkonto:

(K «74 patent d by agreement with Bayer Staatsbank Lindau (B) No. 1562 Munich 295

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rapid decrease in temperature occurs and the various temperatures with high accuracy are maintained with minimal condensation and ice build-up in the chambers.

It has hitherto been comparatively expensive to provide and manufacture controls for a refrigerator with two departments υοη different working temperatures. The amount and duplication of drive and control equipment required for the separate compartments is known, including the cost of an 8 wall insert to provide a two compartment cabinet. The ice formation on the partition walls due to the condensation due to the temperature difference has a satisfactory working impaired the Eisibldung occurred generally in the freezer compartment as supplied wet air during opening and closing of a door, and thus the cooling efficiency was disturbed _o

For a further explanation of two-chamber refrigerators refer to US patents IMr. 3.oo5.321 and 3.027.732, in which the subjects with different Temperature for separate air circulation and separate temperature

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Controllers are separated from each other.

In the present invention, a cabinet is provided which provides a single large cooling space which is separated into an upper chamber and a lower chamber by a removable insulated panel, the panel having an edge spaced from an adjacent wall, and preferably at a height of and next to the connection between the adjacent vertical posts of two locks, such as doors or drawers ₀ The distance of the plate from an adjacent lüand provides a cross-section elongated and narrow passage, which the two chambers along a UJand des Keeps the cabinet in constant contact with each other. Air is dried in the evaporator compartment and cooled to a temperature of about minus 17.8 C (o F) and supplied by a fan under constant drive in sufficient quantity to quickly bring the temperature of both chambers to -17.8 to -15 C. (o - 5 F) decrease.

Thus, the refrigerator can be quite successful without the plate can be operated as a single large freezer compartment or, if desired, as a refrigerator with two compartments and two temperatures, with attached plate can freeze air

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is fed to one of the chambers and part of it via the passage into the other chamber in an appropriate manner Quantity to be diverted to return the warm air to be replaced by cooling air above a predetermined temperature. The warm, replaced air is under the Control of a thermostatically controlled shut-off valve, located remotely from the passage, in the evaporator compartment returned

With a continuously running fan, the air cooled to -17.8 to -15 ° C (θ - 5 ° F) into a If the freezer chamber presses, the temperature there is essentially constant and controlled by the Expansion valve of the evaporator below freezing point, while the cooling chamber only has enough cold air as a thin, fan-shaped spreading jet is supplied for cooling without local freezing to cause the refrigerated goods, which is controlled by a return thermostat, which is a closing or Has throttle valve, some sub-freezing cold air is allowed to return to the evaporator compartment, to maintain a substantial circulation of frozen air in the freezer compartment and moisture removing it, however, will not return enough to create a significant pressure differential between the two chambers

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to cancel, which is provided at the passage.

Even with a kept in the freezer, constant, low temperature, there is stability against temperature dispersion, which is the thermostatic controlled closing valve at the outlet of the chamber with higher temperature allows, on a predictable basis Working operating curve. Its opening varies proportionally to changes in temperature and stress the pressure difference at the narrow passage varies equally, thereby providing a rapid temperature-lowering ability is present in both chambers and the temperatures in both chambers in tight Tolerances can be obtained, and because of the size there is sufficient delay in the passage to prevent the temperature in the cooling chamber from being excessively lowered to avoid.

The invention is further characterized by limiting the oil / icing and defrosting to an evaporator compartment, where the evaporator is set to a low freezing temperature to collect moisture and is regularly defrosted electrically. The narrow passage is attached to the doorway, where warm air

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reaches the edge of the panel whenever the door is opened and heating assemblies from lower Anti-fogging performance prevents the flow area of the passage from being blocked. Also the Dry air moving from the freezer section to the refrigerator section absorbs moisture and leads it to the Evaporator, thereby reducing the risk of blocking the passage when opening and closing the door in one switch off humid atmosphere.

The invention is illustrated by preferred embodiments in conjunction with the accompanying drawings described.

It shows:

1 is a partially disassembled perspective view illustrating a cabinet embodiment; which is used with a single interior for either refrigeration or freezing temperatures;

Fig. 2 is a sectional view of the assembled cabinet shown in Fig. 1 on the line II-II, the shows a freezing air duct installed in the insulated rear wall of the cabinet;

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Fig. 3 is a view similar to FIG. 1, in which the cabinet a closed chamber execution farm with different Temperature and different pressure is rebuilt;

4 shows a sectional view similar to FIG. 2, but on the Line IW-IU v / on Fig. 3 showing those in the isolated Represents the return duct of the warm air attached to the rear wall;

FIG. 5 is a schematic view of the working parts of the thermostatically controlled one shown in FIG Uentils and

Fig. 6 is an interior view in elevation, indicating the relative positions of the openings of the conduits _o shown in the other Figures ,,

In the drawings, an independent freezer or cooling device 1o is shown in Fig. 1, which for Lyiassenproduction is constructed and has a cabinet that can be easily stored on at least \ / ier different operating modes can be switched .. He is

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mainly constructed as a large interior space 12 for cooling or freezing, as _{illustrated in FIGS. 0} 1 and 2. Insertion of a removable insulated panel 14 into the cabinet, as illustrated in FIGS. 3 and 4, transforms interior space 12 into an upper chamber 13 and a lower compartment 15 to provide an inexpensive arrangement which can be used as either a two-compartment refrigerator or a two-compartment freezer, or a combination of the two, with one compartment serving as a refrigerator compartment and the other as a freezer compartment. For example, see the embodiment illustrated in Figure 1 and 2, an inner space of a single temperature at a capacity of about 283 -.. (1o to 12 cubic foot) prior to 34o liters, while the example illustrated in Fig ₀ 3 and 4 show embodiments of a capacity of 156 Ltr. (5.5 cubuc feet) for each chamber, with the plate 14 attached in the middle of the interior

The cabinet of the cooling device is preferably provided with an outer housing 16 and an inner insert 18 formed, which define a space which is filled with a foam 2o to a uniform Construction to provide the insulated top and bottom walls 22 and 24, respectively, by two isolated vertical walls

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26 and a third UJand 28 is provided in which the vertical air duct is attached to the insert and embedded in the foam 2o to provide for the circulation of air to and from the interior and the space under the bottom wall. The front wall 23 is open above the interior surface to receive the hinged insulating upper and lower doors 25 and 27, respectively, which are preferably sealed in contact with their adjacent central post 35 (Fig. 4). The insulated plate 14 can be housed in the cavity at the junction between the doors on supports 29, as further described later ₀

The lower UJand 24 occupies 33 on its lower surface isolated, trough-like component 31, which in combination with the bottom wall 24 and the underside of the Foam 2o provides an insulated compartment 3o, the one Evaporator coil 32 of a cooling system takes up «, the evaporator coil 32 lies on the bottom 34 of the trough on and is provided with a baffle plate 36 which rests on the top of the snake 32 and at a distance from the lower surface 33 of the bottom wall 24 is to have a passage 38 for the return flow of warm air from to provide the 'interior 12 in between. The leading edge

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the baffle plate 36 is at a distance from the Conveyor wall 41 of the compartment 3o arranged to a collecting line 42 to accommodate the returning warm air. The warm air flows from the manifold 42 through the steam line 32 in the compartment 3o back to a manifold 44 for cooled air, soft extends under the Bodenujand 24 and through the Impact plate 36 is covered "The impact plate 36 has however, under a portion of the wall 24 (Fig. 2) a cutout 46 opens to provide an upwardly directed outlet opening to be provided for the supply of cooled air. In the foam 2o there are two horizontally spaced mutually arranged vertical ducts 48 and embedded, as illustrated in FIG. 4, to warm air bring back or supply cooled air. The return line 48 opens above the baffle plate 36 and the supply line 5o opens into the cutout 46 to the collecting line below the baffle plate 36.

The return line 48 is through at a vertical distance lateral openings 49 arranged relative to one another and connected to the interior 12, the opening 49 above the middle the interior space 12 is attached and opening 52 slightly above the bottom wall

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Each opening can have a cover plate that closes it 65 or a flow restricting grid 55 or one Record thermostatically controlled valve assembly over which a grille 57 is attached. An adjustment knob 58 controls the setting of the thermostatic valve 59 to allow it to control the cooling temperature between -1.1 and +4.4 C (3o and 4o F) to close. During cooling, the valve practically seldom closes completely and can be supplemented by a constantly open restriction opening 6o, which a minimal return flow warm air.

The feed line 5o is at a vertical distance mutually arranged lateral openings 62 and 64 with the interior space 12 in connection, the opening 62 is arranged close to the top wall 22 of the interior space and the opening 64 is below the width of the interior space, whereby the insulated plate 14 between the feed opening 64 and the return port 49 for the air can be received. One of the openings 62 and 64 can be through a Cover plate 65 are closed or a fan housing 67 'to accommodate a constantly running fan 68 in it having.

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The cooling system comprises a conventional, commercially available one Slide-in compressor and condenser component, the has suitable fastenings and connecting elements, which are accommodated in a capsule 7o, where the component is placed on a base plate 72 below the trough 31 is attached, which receives the evaporator coil 32. To further understand the versatility and applicability of the cooling system, it should be noted that the refrigerant component includes a compressor 74 having the outlet of a finned coil 73 is connected in the evaporator 32. The compressor is operated by a low pressure control 75. That: Compressed coolant is expelled into a cooling coil 76 which is cooled by a fan 27 'where the Gas-liquefied under pressure and then in a liquid container 77 is kept. The liquid outlet of the container is over a desiccant 78 and then over an expansion valve Bo with the inlet of the coil 73 tied together. The expansion valve is under the control of a temperature piston 81 mounted in the compartment 3o. An electric heater 83 regularly defrosts the evaporator and the water is supplied to an external electric heater heated water evaporator 85 delivered. lUie already mentioned, the cooling device Io can be completely at

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Freezing temperature or completely at cooling temperature operated with or without the plate 14, or at freezing temperature in the upper chamber and cooling temperature in the lower chamber or vice versa, at refrigeration temperature in the upper chamber and freezing temperature in the lower one Chamber. All of these modes of operation can be achieved by appropriately attaching a minimum of auxiliary components in the interior space 12, such as the insulated plate 14, the fan housing 67, the thermostatic valve 56 with the backflow control valve, the cover plate 65 and the grille 55 to restrict the flow, these conversions can be done after the refrigerator has been turned on.

In Fig. ₀ 1 no insulated plate 14 is attached in the interior space 12 and the air circulates freely under the action of the fan 68, which is attached to the upper opening 62 of the cold air supply, the lower opening 64 being closed by a cover plate 65 is.

As can be seen more easily from Fig. 4, where the return line 48 is shown sectioned for the warm air, the upper opening 49 of the return line 48 is through a Cover plate 65 closed and the lower opening 52 is

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closed by a temperature sensitive control valve 56 which is used for closing either set at refrigerator temperature or freezer temperature can be. The cold air is underneath the interior Fan pressure supplied to the extent that it is allowed to air through the thermostatic valve 56 from the To exit the interior and thereby control the interior temperature »

In Fig. 3 the Zujeikammer embodiment is shown with the 'plate 14 attached in its position * The cooling capacity is also large in this embodiment. The arrangement of the cold air supply is the same as in Fig. 2, but the upper opening 49 above the plate 14 is covered with a flow restricting grille 55. A gap 66 for a restricted flow between the front edge of the insulated plate 14 and the door allows the flow of cold air in the lower chamber, which controlled by the Auflußuolumen of air through the Thermostatv / alve 56 iuird- _o is the area of the gap 66 for the limited flow in cross-section a long and narrow passage, so that the flow of cold air between the chambers is thin and fan-shaped

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spreads to prevent local cooling, but the airflow mixes quickly and the air gently swirled to provide a uniform temperature to an extent that is determined by the volume of the returning air is controlled which flows through the thermostatically controlled valve 56 when the warmer air flows through the return line 48. In this case, the temperature of the upper chamber 13 controlled by the control piston 81 of the expansion valve in the evaporator compartment, while the higher temperature the lower chamber 15 by drawing air from the lower chamber through the use of the adjustment knob 58 set thermostatic valve 56 is determined »

If the lower chamber 15 is the freezing chamber and the upper Chamber 13 should be the cooling chamber, the fan 68 in the opening 64 and the thermostatic valve 56 in the be attached lower opening 49 of the upper chamber. The same operation results, with the chamber temperatures are reversed.

The versatility of a single device is thus shown, which can be operated in four different ways can, simply by "providing a fan, one

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Thermostatic valve, a cover plate, · one the river delimiting grid and a plate that can be attached in two arrangements and with With the plate attached, the objects and advantages set forth herein are achieved.

For example, with an interior 12 that has a capacity of 283 - 34o liters (1ο'to 12 cobuc feet) and with an evaporator arrangement attached below the interior space above the condenser, as well as in the case of lines that are attached between the evaporator and the interior in order to supply cold air and extracting warm air is a constant speed fan in the upper chamber which is switched off when a door is opened o The low pressure control for the lower temperature is set to switch on at o.7o3 kp / cm (io psi) and switch off at ο kp / cm «o.9o7 kg (2 pounds) of the refrigerant R 12 is the charge of a 1/4 HP device and the narrowed passage between the plate and the central mullion of the door has a cross-section of 483 mm by 6.35 mm (19 inches by 1/4 inch) + _ 1.588 mm (1/16 inch), This length dimension can be varied for the same refrigerators, the door width of which varies. Thus amounts to

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the flow area for the volume won 283 to 34o Ltr.

(io to 12 cubic feet) about 32.3 cm (5 spuare inches),

luas a ratio of substantially 6.45 cm (1 spuare inch) open connection area per 56.6 ltr. (2 cubic feet) volume results.

Because the interior shown is roughly in two halves is divided and the air of the lower temperature is constant and essentially unobstructed from the Evaporation chamber is supplied, the refers more important ratio to the volume of the chamber having

lower temperature, which is about 6.45 cm (1 spuare inch) for every 28.3 liters (1 cubic foot) of chamber space amounts to.

Furthermore, the main ice formation does not occur of the refrigerator, where the incoming air is dehumidified at about -17.8 C (θ F) and any Ice formation is essentially due to the evaporator component limited, from which it regularly passes a low-voltage heater with a blower is automatically removed about 4 times a day. The expiring Water is collected in a Uiasserwerdampfer 85 and returns to the atmosphere outside the refrigerator,

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Every time the evaporator coil has a temperature of about 15.6 C (60 F), the The defrosting process is switched off and the cooling system and the fan will work normally again.

The heaters 9o on the edges of the door center jamb have a power of about 20 watts for each door with its two parts positioned opposite the narrowed opening 66. Set these heaters to 9o together with the occasional opening of the doors: ensure that no condensation or ice build-up will occur, which reduces the flow area of the passage 66.

Claims

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Claims (1)

Claims ·. 1, p refrigerator with insulated walls and one insulated Closures defining a cooling interior, characterized by a removable one insulated plate (14) which separates the interior (.12) into chambers (13, 15) for different temperatures, an insulated housing next to the interior space (12), which defines an evaporator compartment '(.3ο), an evaporator arrangement (-32) therein to lower the air temperature to a temperature below freezing point to the Air to cool and dry, ujobei the evaporator assembly a temperature controlled coolant expansion valve (So) contains a cold air supply line (5o) in one of the walls that is connected to the air outlet of the evaporator compartment and at a vertical distance mutually arranged feed openings (62, 64) has, which open on opposite sides of the plate (14) into the interior (12), a warm air return line (48) in one of the walls which is connected to the air inlet of the evaporator compartment (3o) and has return openings (49, 52) which are arranged at a vertical distance from one another and which are located on opposite sides Sides of the plate (14) on remote from the feed openings Open places in the interior (12), a device (68) - 2o - 00 9 8 / ^ 7/1317 - 2ο - for the continuous driven supply of freezing air through the supply line (5o), u / enn the Closure (25, 27) is closed, a device (65) for closing the feed opening (64) in a the chambers (15), one. Device for returning heated air from the other chamber, which is a Flow restriction grid (55) over the return port (49) in one chamber (13) and a thermostat (59), the other return opening (52) in response to the above freezing temperature in the other chamber (15) closes variably, the plate (14) with the closure (25, 27) defines a continuously open passage which is elongated in cross section, which connects the chambers (13, 15) and 2 a flow area of about 6.45 cm (1 spuare inch) per 28.3 liters (1 cubic foot) of the space available in the other chamber. 2. Refrigerator according to claim 1, characterized in that the isolated Closure is a door (25), (27) and contains an electrical low-voltage heater (9o), which is along a Side of the passage (66) is arranged, - 21 - 009847/1317 3 '. Refrigerator according to claim 1, characterized characterized in that the closure includes zuuei doors (25, 27) which are located on their neighboring Sealing touch edges at the level of the passage (66) and one side of the passage form. 4. Refrigerator with insulated walls and one insulated Shutters defining a cooling interior characterized by an insulated one Housing (3o) next to the interior (12) which defines an evaporator compartment, an evaporator (32) in the Compartment, an air supply line (So) »which the cold air outlet (44) of the evaporator compartment (3o) through an air supply opening (62) connects to the cooling interior (12) next to its shroud, a fan (68) for moving the Cold air supply at a freezing temperature through the Feed line (5o) into the interior (12), a warm air return line (48), the cooling interior (12) through an outlet opening (52) next to its bottom with the U / arm air inlet (42) of the evaporator compartment (3o) v / connects, a thermostatically controlled valve (59) on the outlet port (52) to allow the flow of warm air therethrough above a predetermined temperature above freezing point - 22 - 00 9847/1317 and an isolated device (14) between the supply port (62) and the outlet port (52), which the interior (12) in a freezing chamber (13) and a cooling chamber (15) divides, and in the interior (12) an elongated and narrow cross-section, defined open passage (66) which connects the chambers (13, 15) with one another. 5. Refrigerator according to claim 4, characterized in that the Uerdampfer (32) the return air entering the air supply line (5o) dehumidified with the help of ice formation and contains a device (83) for regular melting of the ice formation, to clear the freeze evaporator (32) and a device (65) is provided for discharging the molten ice from the evaporator compartment. 6. Refrigerator according to claim 4, gekennzeichn etrl u r c h an opening (55) between the freezing chamber (13) and the air return line (48), the air flow limited to an amount less than the air flow capacity of the fan (68) in order to maintain a pressure in the freezing chamber (13) which is higher than that in the return line (48). 0 0 9 8 A 7/1 3 1 7 ²³ " 7. Refrigerator according to claim 4, characterized in that the isolated Closure is a door (25, 27), and an electric one Contains low-voltage heater (9o) which is arranged along one side of the passage (66) " 8. Refrigerator according to claim 4, characterized in that the closure zujei doors (25, 27) that run along their adjacent edges at the level of the passage (66) lie sealingly and form one side of the same. 9. refrigerator with an insulated housing and closure which define an insulated cooling interior, characterized by a device (68) for the continuous, driven supply of freezing air to a chamber (13) and the closure is closed, a device for drawing off the heated air uon the other chamber (15) at an opening (5?) Removed from the isolated device (14), the opening (52) being a variable covering the opening Flow control valve (56) and a temperature of the other chamber (15) appropriate temperatureiiipensiv - 24 - 0 0 9 R U 7/1 3 1 7 Element (59) includes to the valve opening (52) to control and the isolated disconnector (14) a passage elongated in cross section (66) defines the chambers (13, 15) with one another 2 connects and has a flow area of approximately 6.45 cm (1 spuare inch) per 28.3 liters (1 cubic foot) of existing Has space in the other chamber (13). 1o _o refrigerator according to claim 9, characterized in that the passage (66) through a space between the closure (25, 27) and the isolated device (14) with a distance of less than 12.7 mm (1/2 inch ) is defined. 11. Refrigerator according to claim 9, characterized in that the feed device an evaporator compartment (3o) and a refrigerant evaporator (32) therein, and the extractor includes a return conduit (48) for the air inlet pressure of the evaporator compartment is exposed and a flow control device (55) is provided, which connects the one chamber (13) with the return line (48) and one the Has air flow limiting opening. - 25 - 0 0 9 B / »7/1 3 1 7 12. Refrigerator according to claim 9, characterized characterized in that the trigger device a return line (48) which opens into the lower temperature chamber and to the inlet (42) of the evaporator leads, with the valve opening (52), which is closer to the inlet of the steam chamber arranged opening is " 13. Experience of cooling two isolated chambers to different temperatures, g e k e η η ζ ei c h η et by feeding a powered continuous Flow of freeze-cold air from one source to one the chambers, limiting the withdrawal of return air from the one chamber to provide a relative pressure therein, absorbing the units of heat from the Contents of the two chambers, the withdrawal of air from the one chamber which is warmer than a predetermined temperature above freezing point and the passage of exchange air under pressure from one chamber to the other in a beam elongated in cross section, whose Flow area about 6.45 cm (1 spuare inch) per 28.3 liters (1 cubic foot) of the space in the other chamber. - 26 - 9-8A7 / 1317 14. The method according to claim 13, characterized characterized in that the smaller dimension of the beam is less than 12.7 mm (1/2 inch) for quick distribution of the freezer-cold air, to eliminate local freezing concentrations of the cold air in the other chamber. 15. The method according to claim 13, characterized characterized in that the jet of freeze-cold air is thin and spreads out in a fan shape, to enter the other chamber lengthways and in contact with a U / and of the same. 0 G 9 8 U 7/1 3 1 7 Blank page