DE7906877U1 - EVAPORATOR OF A PREFERABLY COMPRESSOR-OPERATED REFRIGERATION SYSTEM - Google Patents

Description

R. & G. Schmöle Metallwerke GmbH & Co. KG, 5750 Menden Evaporator of a preferably compressor-operated

Refrigeration system

The innovation relates to an evaporator in a refrigeration system a preferably compressor-operated refrigerator, such as a refrigerator, fridge-freezer, freezer or the like one punched from a flat sheet metal plate or cut out and then box-shaped to form a cooling compartment curved evaporator section with upper and lower walls as well as two side walls, freely accessible inside on the inside of the front of the refrigerated cabinet comprises, wherein the sheet metal plate of two interconnected sheets with between them in a substantial part meandering their length, embossed in the sheet metal plate There is refrigerant channels, which are located at least in a substantial circumferential area of the box-shaped bent evaporator section extend.

Such an evaporator is used to supply cold!

into the refrigerated compartment (s) of the refrigerated cabinet. If the refrigeration unit j is operated by means of a compressor, the refrigerant | flows through a closed circuit which, in addition to the evaporator , comprises a condenser. Between the evaporator and the condenser there is a compressor which has the task of bringing the refrigerant that has evaporated in the evaporator at low pressure to the high pressure at which it can condense in the condenser. The liquid; ge refrigerant then flows through a capillary restrictor tube, \ j which has the task of the high-pressure liquid j ness to the low evaporator pressure to relax again

j to the evaporator.

In the case of a refrigerator, the evaporator is placed in a refrigerator housing. Here the vaporizer points in usually has a freezer evaporator section that operates at an air temperature below freezing point, and a refrigerated compartment evaporator section which is designed for an air temperature above freezing point, the two evaporator sections are assigned to each other thermally insulated cooling compartments of the refrigerator, the freezer compartment as well as the cooling compartment.

In the known evaporator of the type specified at the beginning (German Auslegeschrift 1 232 598), which is assigned to a compressor-operated refrigeration unit, the connections of the refrigeration system provided at the end of the refrigerant channels of the box-shaped bent evaporator section are located within the; Upper wall of this evaporator section. The connections of the refrigeration system are designed as two connection points arranged at a distance from one another; nozzles formed, with one of the connecting pieces via a | Pipeline with the interposition of a throttle point with the! Condenser, the other connection piece is connected to the compressor via another pipe. ■

By making the connections to the refrigeration system "here inside the top wall of the box-shaped curved evaporator section are provided, the pipes connected to the connections before they enter the rear part of the refrigeration unit regularly within the evaporator section formed by the box-shaped curved section, e.g. for holding food provided cooling compartment, the usable space of this cooling compartment is due to the pipe sections extending in its interior restricted. In addition, the connections of the refrigeration system, as they are also bent inside the box-shaped:

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own evaporator section and thus cooling compartment, e.g. for monitoring their tightness only proportionally are difficult to access.

The innovation is accordingly based on the task of developing the vaporizer of the type specified at the beginning so that that the usable space of the cooling compartment formed by the box-shaped curved evaporator section does not penetrate into its interior extended pipe sections is restricted and the connections of the refrigeration system also for e.g. monitoring them for leaks are easily accessible.

According to the innovation, this object is achieved using the features included in the characterizing part of claim 1 solved.

The features of the solution of claim 1 mean that the connections of the refrigeration system are completely in the rear Part of the refrigerated cabinet are relocated and thus outside the usable space of the evaporator section which is bent in the shape of a box formed refrigerator compartment. As a result, the inside of the refrigerator compartment is completely usable for e.g. the accommodation of Food available. At the same time, the connections to the refrigeration system are easily accessible.

Since the connections of the refrigeration system, which are particularly prone to failure as a result of leaks, are made using the;

Innovation lie outside the usable space of the cooling compartment formed by the box-shaped curved evaporator section, i these connections are also protected against mechanical stress by the user of the refrigerated cabinet, e.g. when bringing in | of food in the refrigerator, secured, which is why leaks;

practically excluded in the area of the refrigerant-carrying sections of the evaporator due to mechanical stress are.

Furthermore, by e.g. punching or

cut obtained, then with the formation of an evaporator

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Box to be bent damper can be transported more easily before its bending in the just extended state, provided that the connections of the refrigeration system are assigned according to the innovation trained receiving tongues.

In addition, those to be connected to the connections of the refrigeration system extended outside the evaporator Pipelines for the refrigerant in the case of the newly used receiving tongues from the box-shaped bent evaporator section can easily be continued in very different directions, with which the individual parts of the Refrigerated furniture can be executed in a very different geometric arrangement to one another. This is even more true than the recording tongues may be bent in completely different directions.

According to a further development of the innovation, the walls of the box-shaped curved evaporator section are also on the outside a thermal insulation layer, preferably in the form of a layer

! covered from foamed plastic foam.

Especially when the walls of the box-shaped curved evaporator section are covered on the outside with a thermal insulation layer made of foamed plastic, it is recommended that the box-shaped curved evaporator section

on one side has a rear wall that closes off its interior and thus the interior of the cooling compartment formed by this _} which lies against the smooth rear edge sections of the box-shaped curved evaporator section and which protrudes towards the rear with the receiving tongues formed from the sheet metal plate.

If the box-shaped curved evaporator section is closed off at the rear by a rear wall in this way, can e.g. a thermal insulation layer made of foam plastic can be applied to its walls by foaming without the risk of Foam penetrates into the cooling compartment of the box-shaped curved evaporator section. This is even more true than with Foaming process in the interior of this refrigerated compartment foam plastic also not in the area of the walled. Lower wall and side walls can penetrate, since there are also any opening areas in these peripheral areas of the cooling compartment as a result of the innovation according to the invention Shifting of the receiving tongues in the rear area of the evaporator section is missing. This is at the same time the vapor tightness of the box-shaped curved evaporator section with rear wall is guaranteed.

According to a further development of the innovation, they point in the circumferential area of the box-shaped curved evaporator section extending refrigerant channels expanded a channel section in their end portion facing the refrigerant outlet Cross-section on. This channel section, known per se, with an enlarged cross section, is used to separate liquid and vapor refrigerant. It is designed in a known manner, for example in the shape of a bottle, where it is referred to as a "steam dome" i , or by several refrigerant-carrying, connected, Vase-shaped condensation spaces formed, the outside as Waffle patterns appear. ■

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In a preferred embodiment of the innovation, the channel section extends with an enlarged cross section within a side wall of the box-shaped curved evaporator part. Especially in this embodiment, the channel section extended cross-section, preferably through several honeycomb-shaped condensation chambers that are contiguous with refrigerant educated.

In this respect, it is recommended that the cross-section widening of the channel section is limited to the outside of the side wall of the box-shaped curved evaporator section. As a result, a reduction in the usable space of the cooling compartment formed by the box-shaped curved evaporator section as a result of the cross-sectional expansion of the duct section is ruled out, whereby an optimal utilization of the usable space of this cooling compartment is achieved.

According to another feature of the innovation, the channel portion of enlarged cross-section extends within a rearwardly protruding receiving tongue, this receiving tongue preferably protrudes to the rear with respect to the rear edge of the lower wall. Is the canal section enlarged Cross-section extends in this way within a rearwardly projecting receiving tongue, this channel section has prefers the shape of a bottle-shaped steam dome with double-sided Bulge.

If the channel section of the enlarged transverse section extends within a rearwardly projecting receiving tongue,; can for a small cross-sectional area of this channel section dennoclji a large volume of the canal incision can be achieved. Besides that :

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means the arrangement of the duct section with an enlarged cross-section within a rearwardly protruding receiving tongue that the occurrence of annoying cooking noises for the refrigerator user largely excluded within the useful space formed by the box-shaped curved evaporator section is. This also results in better utilization of the cooling surfaces of the box-shaped curved evaporator section j by only having low temperatures in the area of these cooling surfaces temperature differences are ensured.

In addition, the coolant channels of the box-shaped curved evaporator section preferably extend both in its upper wall and lower wall as well as in its two side walls. Here, the refrigerant is namely along the entire circumference of the box-shaped curved evaporator section with that located within the cooling compartment formed thereby Air placed in heat exchange, so that the walls of the refrigerator compartment are optimally used for the cold supply. Is that A rear wall is assigned to a box-shaped curved evaporator section, coolant channels can also be used within this rear wall be provided.

It is further preferred that the refrigerant channels of the box-shaped curved evaporator section as refrigerant inlet and outlet of the evaporator one within one

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Have receiving tongue arranged one-pipe connection. The on known one-pipe connection means a reduction in soldering and welding work in the area of the connections of the refrigeration system.

To ensure a narrow design of the box-shaped curved evaporator section, it is also advantageous that the inside of the receiving tongues extending Refrigerant channels at the end, in the area of the connections of the refrigeration system at least essentially parallel to the rear The edge of the respectively adjoining wall of the box-shaped curved evaporator section run.

Further features of the innovation are included in the features of claims 13 and 14, which include a refrigerator concern at least two cooling compartments, for example a refrigerator with two thermally insulated from one another Cooling compartments. In the latter case, for example, the evaporator has a freezer compartment evaporator section of the type specified at the beginning on, which is designed for a useful temperature below freezing point, and a refrigerator compartment evaporator section, the works at a useful temperature above freezing point.

The innovation is explained below with reference to four evaporators designed according to the innovation, which are shown schematically in the drawing and which are used to supply cold
Can be installed in a compressor-operated refrigerator with two cooling compartments (refrigerator-freezer combination) that are thermally insulated from one another. Show it:

Fig. La Pig. Ib

Pig. lc

Pig. 2a Pig. 2b shows the evaporator according to the first exemplary embodiment spread out in one plane in plan view j

the illustrated in Fig. La evaporator according to the first embodiment in the ready-to-install state, with a box-shaped curved evaporator section in a perspective view;

the one in Pig. la with "A" labeled Aus-f · Section of the evaporator according to the first embodiment on an enlarged scale in plan view; j

the attenuator expanded in one plane according to the second embodiment in 4 game in plan view; j

the illustrated in Fig. 2a | damper according to the second embodiment game in the ready-to-install condition, with a box-shaped curved evaporator section in perspective view;

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Pig. 3a shows the evaporator according to the third exemplary embodiment in FIG Top view;

3b shows the evaporator illustrated in FIG. 3a according to the third embodiment in the ready-to-install state, with box-shaped bent evaporator section in perspective view;

FIG. 4a shows the evaporator according to the fourth exemplary embodiment in FIG Top view and i

FIG. 4b shows the evaporator illustrated in FIG. 4a according to the fourth exemplary embodiment in ^{; FIG.} ready for installation, with box-shaped curved evaporator he cut off in perspective view.

The one, generally designated 1, to be installed in the housing of a refrigerator (not shown in detail) The evaporator has two evaporator sections each, a first evaporator section 2, which acts as a freezer compartment evaporator section is designed for an air temperature below freezing point and is therefore assigned to a freezer compartment, as well as a second evaporator section 3, which acts as a refrigerated compartment evaporator section to be assigned to a refrigerated compartment for a useful temperature is designed above freezing point.

Both evaporator sections 2, 3 are punched from a flat sheet metal plate, which is made of two interconnected Sheet metal. The evaporators 1 shown in planar extent in FIGS. 1 a, 2 a, 3 a and 4 a each have between the two sheets of the sheet metal blank running meander, refrigerant channels 4 embossed in the sheet metal plate. The refrigerant channels 4 are shown in FIGS. 1 a, 2a, 3a and 4a and likewise illustrated in Fig. Io by dash-dotted lines.

The first evaporator section 2 wLrd before installation The evaporator is bent into the housing of the refrigerator to form the freezer compartment. The resulting The freezer compartment has a lower wall 2a, an upper wall 2c and two side walls 2b, 2d. There are in Figs. La, 2a, 3a and 4a with 5 indicated by dashed lines the bending lines.

The box-shaped curved evaporator section 2 is also assigned a rear wall 2e made of metal or plastic and closes its interior to the rear. This rear wall 2e can also be provided with refrigerant channels. These refrigerant channels are not illustrated in the drawing. \ It is the rear wall 2e only for the first embodiment, indicated in Fig. Ib with dash-dotted lines.

The freezer compartment formed when the evaporator section 2 is bent is freely accessible on the inside on the front side 6. |

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The second evaporator section 3 is at right angles to the lower wall 2a of the first evaporator section 2 downward j extends and runs after the installation of the evaporator 1 in the: refrigerator parallel to its rear wall. ■

The box-shaped curved first evaporator section
2 has, in the case of each of the four exemplary embodiments, on the rear one or more protruding rearwardly with respect to its otherwise smooth rear edge 7 on its rear edge
continuing, also punched out of the sheet metal blank
or cut-out receiving tongues 8 with refrigerant channels 4 extending on the inside and with connections 9 of the refrigeration system provided at the ends of the refrigerant channels.
Each receiving tongue 8 is with the adjacent wall of the
box-shaped bent first evaporator section 2 in one piece
educated.

The connections to the refrigeration system are only partially in
shown individually, especially in Fig. Ic for the first
Embodiment as well as in Fig. 3a for the third embodiment. The rear wall 2e is not in each case in detail | illustrated way against the smooth rear edge portions
7 of the box-shaped curved first evaporator section 2 \ f sealingly, wherein the receiving tongue (s) 8 protrude towards the rear with respect to the rear wall j 2e. I.

The refrigerant channels 4 of the box-shaped curved first evaporator section 2 each extend both
in its lower wall 2a and its upper wall 2c as well as in its two side walls 2b and 2d.

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All walls 2a, 2b, 2c, 2d and 2e of the box-shaped

j curved first evaporator section 2 are on the outside with

a thermal insulation layer 10, which is only shown in Fig.,

! Ib for the first exemplary embodiment partially illustrative

light is. This thermal insulation layer consists of one layer made of foamed plastic.

The refrigerant channels 4 of the box-shaped bent ^! first evaporator section 2 have in the case of the first, second and fourth exemplary embodiment as a connection 9 for the cold ■

The central inlet and outlet of the evaporator 1 has a one-pipe connection arranged within a receiving tongue 8 * This one-pipe connection comprises, in a known manner, a capillary throttle tube which is used to supply the liquid refrigerant and regulate and which is connected to the condenser outlet and extends through a Compressor-guided suction line extends. The capillary throttle tube is fitted in a medium-tight manner into a throttle channel 11, while the suction line is in turn fitted in a medium-tight manner in a channel with a larger cross-section, which has a lateral inlet for the refrigerant evaporated in the evaporator 1.

The refrigerant channels 4 of the second evaporator section are each in series with the refrigerant channels 4 of the box-shaped curved first evaporator section 2. In the case of the first embodiment of Fig. La, Ib and Ic is the second evaporator section 3 formed in one piece with the box-shaped curved first evaporator section 2, wherein the two evaporator sections 2, 3 are punched from the same sheet metal plate and one of the total of two receiving tongues 8 of the

itt te

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first evaporator section 2 as a connecting web between the two evaporator sections 2,3 with the inside of the receiving tongue 8 parallel to each other extending refrigerant channels 4 is used for the outward and return flow of the refrigerant.

In the case of the third embodiment of Fig. 3a, 3b, the refrigerant inlet into the evaporator 1 also takes place via a capillary throttle tube, which is denoted here by 13. the Connection for the refrigerant inlet in the evaporator 1 jot here but unlike in the first, second and fourth exemplary embodiments, it is provided outside of the receiving tongues 8. In the case of this In the third exemplary embodiment, the evaporator 1 is also not in one piece, just as in the case of the second exemplary embodiment designed such that the first evaporator section 2 and the second evaporator section 3 represent a single part. It is the same as in the second embodiment in the third, the two evaporator sections 2, 3 are connected to one another via pipelines 14 carrying refrigerant.

The total of four exemplary embodiments agree that they are box-shaped in the circumferential area bent first evaporator section 2 extending refrigerant channels 4 in their the refrigerant outlet 15 of the evaporator 1 facing end portion have a channel portion of enlarged cross-section 16.

In the first, second and third exemplary embodiment, the channel section extends with an enlarged cross section 16 within one of the two side walls 2b, 2d. The channel section with enlarged cross-section 16 is consistent here formed by several interconnected, honeycomb-shaped condensation chambers carrying refrigerant.

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In the case of the fourth embodiment, it extends
In contrast, the channel section expanded cross-section 1.6, as can be seen in FIGS. 4a, 4b, within one after
rear protruding receiving tongue 8, which in turn opposite
the rear edge 7 of the lower wall 2a protrudes to the rear. It: the channel section has an enlarged cross-section 16 in the fourth exemplary embodiment is in the form of a bottle ^; formed steam domes with bulges on both sides. '

The one assigned to the second evaporator section 3
Part of the sheet metal plate has in its upper end region a receiving tongue | punched out of this part of the sheet metal plate and to be bent out of the plane i of the second evaporator section 3 17 with refrigerant channels 4 j extending on the inside and with connections 9 provided at the ends of the refrigerant channels 4. This makes it easily possible to use the second
Damper section 3 with bending of the receiving tongue 17 in
to extend to different levels. That way you can
the second evaporator section 3 is also visible from the side
be arranged without the receiving tongue 17 and the
The refrigerant-carrying connections connected to it are also visibly exposed on the front.

The refrigerant channels 4 extending on the inside of the receiving tongues 8 are at least at the ends in the area of the connections 9 of the refrigeration system in all four exemplary embodiments
essentially parallel to the rear edge 7 of the respectively adjoining wall of the box-shaped curved evaporator section
2 extends, with the exception of the steam dome receiving tongue 8 of the fourth embodiment.

Claims (14)

DR.-ING. STUHLMAhitf - ^ dI'P'L .- 'INCsL WiLLERT DR.-ING. OIDTMANN - DIPL.-PHYS. DR. JUR. REUTERS PATENTANWÄLTE FILING NO. 317/28392 4630 BOCHUM? · 3 · 1979 Post office box 1O 24 50 Your reference Fernruf Ο234 / 5 19 57 Bergstrasse 159 Telegr.i Stuhlmann patent R. & G. Schmöle Metallwerke GmbH & Co. KG Menden Protection claims: 1. Evaporator of a refrigeration system, preferably one ν Compressor-operated refrigeration units, such as refrigerators, fridge-freezers, Freezer or the like. One punched or cut out of a flat sheet metal plate and then under Formation of a refrigerator compartment with a box-shaped curved evaporator section that is freely accessible on the inside on the front side of the refrigerator Has upper and lower wall and two side walls, the sheet metal plate of two interconnected sheets with between meandering them in a substantial part of their length, there are refrigerant channels embossed in the sheet metal plate which is at least in a substantial circumferential area of the box shaped curved evaporator portion, thereby characterized in that the box-shaped curved evaporator section (2) on the rear side one or more, opposite Q its otherwise smooth rear edge (7) protruding to the rear, continuing at its rear edge (7), too \ receptacle punched or cut out of the sheet metal blank tongues (8) with refrigerant channels (4) extending on the inside and with connections provided at the ends of the refrigerant channels ρ (9) of the refrigeration system, in particular of the refrigerant inlet and -outlet of the evaporator (1), each of which receiving tongue (8) formed in one piece with the respectively adjoining wall (2a, b, c, d) of the box-shaped curved evaporator section (2) is. 2. Evaporator according to claim 1, characterized characterized in that the walls (2a, b, c, d) of the box-shaped curved evaporator section (2) on the outside with a Thermal insulation layer (10), preferably covered in the form of a layer of foamed plastic foam. 3. Evaporator according to claim 1 or 2, in particular according to claim 2, characterized in that that the box-shaped curved evaporator section (2) has a rear wall (2e) that closes off its interior () to the rear has which against the ^ slat rear edge sections (7) of the box-shaped curved evaporator section (2) sealing and the opposite the receiving tongues (8) to the rear protrude. 4. Evaporator according to claim 1, 2 or 3, characterized in that the circumferential area of the box-shaped curved evaporator section (2) extending refrigerant channels (4) in their facing the refrigerant outlet End portion have a channel portion of enlarged cross-section (16). 5. Evaporator according to claim 4, characterized in that the channel section with enlarged cross-section (16) extends within a side wall (2b, c) of the box-shaped curved evaporator part (2), wherein it is preferably connected by several refrigerant-carrying _s ; low, honeycomb-shaped condensation spaces is formed. \ 6. Evaporator according to claim 5, characterized in that the cross-sectional expansion of the channel section (16) on the outside of the side wall (2b, c) j • t # a • ■ of the box-shaped curved evaporator section (2) limited S is. f 7. Evaporator according to claim 4, characterized in that the channel section with enlarged cross-section (16) extends within a rearwardly projecting receiving tongue (8), this receiving tongue (8) ] preferably towards the rear relative to the rear edge of the lower wall (2a) protrudes. 8. Evaporator according to claim 7, characterized characterized in that the channel section expanded cross-section (16) has the shape of a bottle-shaped ί Has steam dome with bulges on both sides. | 9- evaporator according to claim 1 to 5, characterized ■ characterized in that each receiving tongue (8) opposite the rear edge (7) of the upper wall (2c) to the rear protrudes. 10. Evaporator according to claim 1 or one of the following, characterized in that the refrigerant channels (4) of the box-shaped curved evaporator section (2) extend in its upper wall (2c) and lower wall (2a) and in its two side walls (2b, 2d). | 11. Evaporator according to claim 10, characterized in that the refrigerant channels (4) of the box-shaped curved evaporator section (2) as refrigerant inlet and outlet (9) of the evaporator (1) a one-pipe connection (11) arranged within a receiving tongue (8) 12). -I ₁ - 12. Evaporator according to claim 1 or one of the following, with the exception of claim 6, characterized that the inside of the receptacles (8) extending refrigerant channels (4) at the end, in the area of the connections (9) of the refrigeration system xxxxxxx at least in the substantially parallel to the rear edge (7) of the respectively adjoining wall (2a, b, c, d) of the box-shaped curved evaporator section (2) run. ! 13. Evaporator according to claim 1 or one of the following, j characterized in that it (2) at least one further flat stretched and preferably exclusively for use temperature above the freezing point (as refrigerating compartment evaporator section) [set except the i box-shaped bent, preferably for a Nutζtemperatur below the freezing point (as freezer evaporator portion) designed evaporator section Evaporator section (3) upwards, which is preferably; runs parallel to the rear wall of the refrigeration unit and its refrigerant ducts (4) via at least one of the receiving tongues (8) I with the refrigerant ducts (4) of the box-shaped curved connection; steamer section (2) lie in series. 14. Evaporator according to claim 13, characterized characterized in that the further evaporator off; Section (3) is formed in one piece with the box-shaped curved evaporator section (2), the two evaporator! Sections (2 _S 3) are punched or cut out of the same sheet metal plate and one of the tabs (8) of the box-shaped curved evaporator section (2) serves as a connecting web between the two evaporator sections (2,3) with refrigerant channels extending parallel to one another on the inside of the receiving tongue (8) ( 4) is used for the return and return of the refrigerant.