DE102014210679A1 - Refrigeration device with an evaporator - Google Patents

Abstract

The present invention relates to a refrigerator having an inner container (101) for refrigerated goods and an evaporator tube (103) for guiding a refrigerant, which is wound around the inner container (101) with horizontal pipe sections, in which the inner container (101) comprises deflection lugs (107) at which a bend (109) of the evaporator tube (103) is guided between the horizontal pipe sections.

Description

The present invention relates to a refrigerator having an inner container for refrigerated goods and an evaporator tube for guiding a refrigerant which is wound around the inner container.

In refrigerators, coiled-tube evaporators may be used, which comprise an evaporator tube which is wound around an inner container. In the Wickelrohrverdampfern, also called wrap-around evaporator, but sinks can occur in the evaporator tubes, in which a refrigerant collects. As a result, the refrigerant evaporates mainly in the pipe sections located on the shelf and the evaporator surface is used only inadequate. This can affect the efficiency of the device.

The publication CN 201867010 describes a refrigerated container with an integrated coiled-tube evaporator comprising vertical tube sections.

The publication DE 2008 021 104 describes a winding evaporator, which is preceded by an evaporator located in the freezer compartment.

The publication DE 2011 088 656 describes a combination of static winding evaporator and dynamic Nofrost evaporator.

The pamphlets DE 2010 028 526 and DE 2010 028 527 describe a heat transfer between a wall and a tube of a winding evaporator by means of a separate heat conducting plate or a graphite-containing Wärmeleitschicht.

It is the object underlying the invention to provide a refrigeration device in which a uniform distribution of a refrigerant takes place in an evaporator.

This object is achieved by the subject matter having the features of the independent claim. Advantageous embodiments of the invention are the subject of the figures, the description and the dependent claims.

According to one aspect of the invention, the object is achieved by a refrigeration device having an inner container for refrigerated goods and an evaporator tube for guiding a refrigerant which is wound around the inner container with horizontal tube sections, in which the inner container comprises deflection lugs, at which a bend of the evaporator tube between the horizontal pipe sections is performed. Thereby, for example, the technical advantage is achieved that a precise installation of the evaporator tube is achieved in which liquid refrigerant does not accumulate in the sheets of the evaporator.

A refrigeration appliance is understood in particular to mean a domestic refrigeration appliance, that is to say a refrigeration appliance that is used for household management or in the gastronomy sector, and in particular for storing food and / or drinks at specific temperatures, such as, for example, a refrigerator, a freezer, a refrigerated freezer combination, a freezer or a wine fridge.

In an advantageous embodiment of the refrigerator, the Umlenknasen are formed by an attachment for placing on the inner container. As a result, for example, the technical advantage is achieved that the refrigeration device with the Umlenknasen can be made in a simple manner and a mutual alignment of the Umlenknasen deleted.

In a further advantageous embodiment of the refrigeration device, the inner container comprises a recess for inserting the attachment part. As a result, for example, the technical advantage is achieved that the attachment can be mounted with a high accuracy of fit and the attachment parts adhere to the inner container when the evaporator tube is bent around them.

In a further advantageous embodiment of the refrigeration device, the depression is substantially rectangular. As a result, the technical advantage is achieved, for example, that the attachment can be used in two assembly directions.

In a further advantageous embodiment of the refrigerator, the attachment is attached to a side wall of the inner container. As a result, for example, the technical advantage is achieved that the evaporator tube can be attached to the horizontal pipe sections on an outer side of the side walls.

In a further advantageous embodiment of the refrigeration device, the attachment is attached to a floor and / or a ceiling of the inner container. As a result, for example, the technical advantage is achieved that increases the evaporator surface and thus improves the thermal contact between the evaporator and the refrigerator compartment.

In a further advantageous embodiment of the refrigeration device, the attachment part is formed from a thermally conductive material. Thereby, for example, the technical advantage is achieved that a thermal contact is improved to the inner container.

In a further advantageous embodiment of the refrigeration device, the inner container comprises a first attachment part on a side wall and a second attachment on an opposite side wall. Thereby, for example, the technical advantage is achieved that the evaporator tube is attached to both sides of the inner container and the horizontal pipe sections can be arranged with high accuracy.

In a further advantageous embodiment of the refrigeration device, the first attachment part and the second attachment part are identically shaped. As a result, the technical advantage is achieved, for example, that reduces the cost of manufacturing the refrigerator.

In a further advantageous embodiment of the refrigerator, the attachment is glued to the inner container. As a result, for example, the technical advantage is achieved that the attachment can be quickly and reliably attached to the inner container.

In a further advantageous embodiment of the refrigerator, the Umlenknasen are formed by deep drawing of the inner container. As a result, for example, the technical advantage is achieved that the Umlenknasen are an integral part of the inner container.

In a further advantageous embodiment of the refrigerator, the Umlenknasen are formed by semi-circular discs which are attached to the inner container or deep drawn. As a result, for example, the technical advantage is achieved that the Umlenknasen be formed with a low material usage.

In a further advantageous embodiment of the refrigerator, the Umlenknasen include overhangs that press the evaporator tube to a wall of the inner container. As a result, for example, the technical advantage is achieved that improves the heat transfer in the region of the bend.

In a further advantageous embodiment of the refrigeration device, the deflection lugs comprise a groove-shaped depression for inserting the evaporator tube. As a result, the technical advantage is achieved, for example, that the bend can be performed with high precision.

In a further advantageous embodiment of the refrigerator, a Umlenknase is semicircular or circular segment-shaped. As a result, for example, the technical advantage is achieved that a uniform radius of curvature of the bend is achieved and the evaporator tube can be deflected with low material use by any angle.

In a further advantageous embodiment of the refrigeration device, the evaporator tube runs meandering along the wall. As a result, for example, the technical advantage is achieved that the effective evaporator surface is increased.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

1 a view of a refrigerator;

2 several views of an inner container with an evaporator tube;

3A a view of an inner container with an evaporator tube;

3B a view of a 5-sided occupied inner container; and

4 an enlarged cross-sectional view through a Umlenknase.

1 shows a refrigerator as a representative of a refrigerator 100 with an upper refrigerator door 117 for a refrigerated compartment and a lower refrigerator door 119 for a freezer. The refrigerator is used for example for cooling food and includes a refrigerant circuit with an evaporator, a compressor, a condenser and a throttle body. The evaporator is a heat exchanger in which, after expansion, the liquid refrigerant evaporates by absorbing heat from the medium to be cooled, ie the air inside the refrigerator.

The compressor is a mechanically operated component that draws refrigerant vapor from the evaporator and expels it at a higher pressure to the condenser. The condenser is a heat exchanger in which, after compression, the vaporized refrigerant is released by heat release to an external cooling medium, i. the ambient air is liquefied. The throttle body is a device for the continuous reduction of the pressure by cross-sectional constriction.

The refrigerant is a fluid used for heat transfer in the cryogenic system which absorbs heat at low temperatures and low pressure of the fluid and releases heat at higher temperature and pressure of the fluid, usually including phase changes of the fluid.

Twin circuits with two alternately operated, parallel evaporators with Check valve achieve a vaporizing temperature above the freezer compartment temperature in the refrigerator compartment operation. Since the refrigerator compartment evaporator is filled exclusively with gaseous refrigerant when switching over from freezer to refrigerated compartment operation, recirculation of refrigerant from the freezer compartment evaporator to the condenser is often carried out before the refrigeration compartment is operated (refrigerant management). However, there are other possibilities of refrigerant management.

For static refrigerators 100 For the freezer often a coil evaporator (Engl. Wrap Around Evaporator) is used. The winding evaporator comprises an evaporator tube, which is wound around an inner container as Kühlgutbehälter. The inner container is thereby cooled from four sides. From a hygienic and optical point of view, it is advantageous that the evaporator is not visible in the interior and has no contact with the interior. Compared to foamed Rollbond or tube-on-sheet evaporators, a winding evaporator is relatively easy to implement.

A bend in the evaporator tube may result in a plurality of siphons where, due to gravity, liquid refrigerant collects in the underlying bends of the evaporator. As a result, the refrigerant evaporates mainly in the pipe sections located on the shelf and the evaporator surface is used only inadequate.

2 shows a side, front and top view of the structure and the associated pipe guide to an inner container 101 with a circulating evaporator tube 103 a refrigeration device 100 , The winding evaporator comprises an evaporator tube 103 that around the inner container 101 is wrapped as refrigerated goods. The inner container 101 is cooled by four sides. In the refrigerator 100 the refrigerator door is arranged on a front side, so that the current winding evaporator next to the two side walls comprises the top and bottom of the refrigerator compartment. The evaporator tube 103 has horizontal pipe sections 103-1 and 103-2 on.

On the new inner container 101 are disk-shaped Umlenknasen compared to the prior art 107 Deep-drawn without edge, at which a bend 109 of the evaporator tube 103 between the horizontal pipe sections 103-1 and 103-2 is guided. At the Umlenknasen 107 becomes the evaporator tube 103 of the winding evaporator bent by 180 °, so that the door opening is not blocked. Due to the precise installation of the evaporator tube 103 through the Umlenknasen 107 results in a steadily falling pipe without sinks, in which the refrigerant could collect.

The Umlenknasen 107 are an integral part of the inner container 101 By doing this by deep drawing the inner container 101 to be arched outwards. On the opposite inside of the inner container 101 can be a light source 127 or a light bar, which conceals the deep-drawn depressions.

3A shows a view of an inner container 101 with a circulating evaporator tube 103 in which three sides of the inner container 101 be used as evaporator surface, namely the two side walls and the rear wall. The Umlenknasen 107 are as separately attachable attachment parts 105 with several deflection lugs 107 formed on the outside of the inner container 101 are attached. The inner container 101 includes, for example, a first attachment part 105-1 on a side wall and a second attachment part 105-2 on an opposite side wall.

The attachment 105 with the Umlenknasen 107 allows a horizontal pipe run in refrigeration appliances 100 with front door rising. The inner container 101 has in the front region of the side walls in each case an elongated recess 113 on, the attachment part 105 with the protruding Umlenknasen 107 receives.

By the arrangement of several Umlenknasen 107 on a single attachment 105 Reduce the number of components and assembly costs. The resulting indentations on the inside of the inner container 101 extend slightly into the interior and can for example serve as a slide-out lock for drawers, if they have on their back corresponding bulges.

3B shows a view of an inner container 101 with a circulating evaporator tube 103 in which all five sides of the inner container 101 be used as evaporator surface. The attachment parts 105 with the Umlenknasen 107 are also on three sides of the inner container 101 in the additional wells 117 used. The additional attachments 121 are in the depressions 123 at the top and bottom of the inner container 101 used. The deflection nose 125 is formed circular segment.

The injection of the refrigerant takes place at the top of the inner container 101 and runs there meandering to the front edge. From there, the evaporator tube 103 deflected to the left side of the container and runs on the two side walls and the rear wall down. The deflection to the shelf is then analogous to the top.

The attachment parts 105 on the left and right side wall are identical components, which are applied rotated to each other. This is the attachment parts 121 at the top and bottom of the inner container 101 as is the case, so that the complexity increases only slightly. The attachment parts 105 For example, be made of plastic injection molding and in the wells 113 of the inner container 101 to be glued. The winding of the evaporator tube 104 can be done by means of a robot arm. In the area of the depressions 113 or in front of the wells 113 can be a light source 127 be arranged for interior lighting. The Umlenknasen 107 However, they can also be formed by semicircular discs, which individually on the inner container 101 be attached.

4 shows an enlarged cross-sectional view through a Umlenknase 107 with a pipe bend on a wall of the inner container 101 , Through an obliquely upward overhang 111 the Umlenknase 107 becomes a better contact of the evaporator tube 103 with the inner container 101 achieved. The overhangs 111 press the evaporator tube 103 to the container wall. This is particularly relevant at the top and bottom, since there the evaporator tube 103 runs within a plane. Between the evaporator tube 103 and the wall of the inner container 103 is a thermally conductive compound 115 arranged for a better thermal contact, for example a butyl layer.

The Umlenknasen 107 may contain lights, such as LEDs, for the illumination of the interior. Furthermore, the depressions 113 not just be shaped and thus serve as a holder for glass plates / shelves.

The described embodiment of a winding evaporator has the advantage of a uniform refrigerant distribution due to continuous horizontal or slightly sloping evaporator tubes 103 , This increases the effective evaporation area and raises the evaporation temperature. Alternatively, for an even larger evaporator area, all five sides of the inner container 101 with evaporator tubes 103 be occupied. By eliminating siphons in which the refrigerant collects, the winding evaporator is also better for use with twin circuits with refrigerant management.

All of the features explained and shown in connection with individual embodiments of the invention may be provided in different combinations in the article according to the invention in order to simultaneously realize their advantageous effects.

The scope of the present invention is given by the claims and is not limited by the features illustrated in the specification or shown in the figures.

LIST OF REFERENCE NUMBERS

100

 The refrigerator

101

 inner container

103

 evaporator tube

103-1

 pipe section

103-2

 pipe section

105

 attachment

105-1

 attachment

105-2

 attachment

107

 Umlenknase

109

 bend

111

 overhang

113

 deepening

115

 thermal interface material

117

 refrigerator door

119

 refrigerator door

121

 attachment

123

 deepening

125

 Umlenknase

127

 Lamp

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CN 201867010 [0003]
• DE 2008021104 [0004]
• DE 2011088656 [0005]
• DE 2010028526 [0006]
• DE 2010028527 [0006]

Claims (15)

Refrigeration appliance ( 100 ) with an inner container ( 101 ) for refrigerated goods and an evaporator tube ( 103 ) for guiding a refrigerant which is connected to horizontal pipe sections ( 103-1 . 103-2 ) around the inner container ( 101 ), characterized in that the inner container ( 101 ) Umlenknasen ( 107 ), at which a bend ( 109 ) of the evaporator tube ( 103 ) between the horizontal pipe sections ( 103-1 . 103-2 ) is guided. Refrigeration appliance ( 100 ) according to claim 1, characterized in that the deflection lugs ( 107 ) by an attachment ( 105 . 121 ) for placing on the inner container ( 101 ) are formed. Refrigeration appliance ( 100 ) according to claim 2, characterized in that the inner container ( 101 ) a recess ( 113 . 123 ) for inserting the attachment ( 105 . 121 ). Refrigeration appliance ( 100 ) according to claim 3, characterized in that the recess ( 113 ) is substantially rectangular. Refrigeration appliance ( 100 ) according to one of claims 2 to 4, characterized in that the attachment part ( 105 ) on a side wall of the inner container ( 101 ) is attached. Refrigeration appliance ( 100 ) according to one of claims 2 to 5, characterized in that the attachment part ( 121 ) on a floor and / or a ceiling of the inner container ( 101 ) is attached. Refrigeration appliance ( 100 ) according to one of claims 2 to 6, characterized in that the attachment part ( 105 . 121 ) is formed of a thermally conductive material. Refrigeration appliance ( 100 ) according to one of claims 2 to 7, characterized in that the inner container ( 101 ) a first attachment ( 105-1 ) on a side wall and a second attachment ( 105-2 ) on an opposite side wall. Refrigeration appliance ( 100 ) according to claim 8, characterized in that the first attachment part ( 105-1 ) and the second attachment ( 105-2 ) are identically shaped. Refrigeration appliance ( 100 ) according to one of claims 2 to 9, characterized in that the attachment part ( 105 . 121 ) on the inner container ( 101 ) is glued. Refrigeration appliance ( 100 ) according to claim 1, characterized in that the deflection lugs ( 107 ) by deep-drawing the inner container ( 101 ) are formed. Refrigeration appliance ( 100 ) according to claim 1, characterized in that the deflection lugs ( 107 ) are formed by semicircular discs, which on the inner container ( 101 ) are attached or deep-drawn. Refrigeration appliance ( 100 ) according to one of the preceding claims, characterized in that the deflection lugs ( 107 ) Overhangs ( 111 ) comprising the evaporator tube ( 103 ) to a wall of the inner container ( 101 ) to press. Refrigeration appliance ( 100 ) according to one of the preceding claims, characterized in that the deflection lugs ( 107 ) a groove-shaped recess for inserting the evaporator tube ( 103 ). Refrigeration appliance ( 100 ) according to one of the preceding claims, characterized in that a deflection nose ( 107 ) is semicircular or circular segmental.

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