COOLING TUBES FOR SHELVING
A cooling tube system (100) is formed as part of a refrigerator shelf (102). The shelf(102) includes a frame (104) having a series of frame wires (106). Secured above and supported on the frame wires (106) are a set of cooling tubes (114). A fan (132) directs cool air generated from cooling air equipment (130) through vents (136) into the refrigerator interior (129). The air flows through rear hollow ends (140) of the cooling tubes (114). The cooling air (138) is directed toward the front (124) of the refrigerator (120).
This application claims priority of U.S. Provisional Patent Application Ser. No. 60/506,532 filed Sep. 26, 2003.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENTNot applicable.
REFERENCE TO A MICROFISHE APPENDIXNot applicable.
BACKGROUND OF THE INVENTION1. Field of the Invention
The invention relates to shelving which may be adapted for use with refrigerators and other articles employing refrigeration, and, more particularly, shelving having means for facilitating spatial cooling.
2. Background Art
Previous types of shelving have been developed for use as shelves for refrigerators and other types of refrigeration apparatus. For example, refrigerator shelving is often designed with means for permitting selected movement of the shelf within the refrigerator, in addition to providing adequate support for the shelf. Design features of refrigerator shelving may also relate to spillage, prevention of bacteria buildup and the like.
Also, numerous developments have taken place over the past decades with respect to refrigerators themselves, along with refrigeration equipment. For example, substantial development has occurred in providing cooling apparatus for refrigerators. Past generations first saw refrigerators adapted for use with conventional ice blocks. Since those early days, means for cooling (and maintaining cooling) in refrigeration space have developed into complex apparatus, with sophisticated electronics, motors, compressors and similar equipment.
Also, substantial research and development has occurred with respect to other aspects of refrigeration. For example, numerous developments have taken place with respect to insulative materials, and their properties for efficiently maintaining an interior cooled space. Another development has been undertaken with respect to efficiencies and continuities related to the refrigeration interior cooling at various locations within the interior. For example, one problem which occurs with respect to both residential and commercial refrigeration units relates to “hot spots.” Hot spots are commonly known in the refrigeration industry, and may be characterized as areas within a cooled refrigeration interior that experience relatively warmer temperatures than desired. Such hot spots are typically measured by means of temperature gradients. These hot spots may occur, for example, in door bins of traditional side-by-side refrigeration units. In general, it is advantageous to provide cooling of a refrigerator interior in an efficient manner as is possible, with respect to issues such as cost, volume of refrigeration equipment and the like. Also, it is advantageous to attempt to minimize hot spots and their attendant temperature gradients as much as reasonably possible, again without substantially increasing cost, equipment volume or other undesirable properties.
Returning to the concept of refrigerator shelving, various types of shelving designs are known in the prior art. For example, Kane, et al., U.S. Pat. No. 5,564,809, issued Oct. 14, 1996, discloses an encapsulated shelf assembly with a shelf support supporting a panel. The panel has an edge and a one-piece member encapsulating the panel edge and a substantial majority of the shelf support. The shelf assembly may be formed in a mold apparatus which defines a mold cavity and uses a spacing plug to position the shelf support in a mold cavity of the apparatus in a location spaced from the sides of the mold cavity.
Herrmann, et al., U.S. Pat. No. 5,735,589, issued Apr. 7, 1998, discloses a shelf assembly for a refrigerator compartment which includes a member slidably supported for extension and retraction on a support. The shelf member includes slide members which are preferably molded as a rim on an article support surface. A guide member extends from at least one, and preferably both, of the side members to guide the sliding movement. A stop on the guide member limits travel by engaging a limit surface on the shelf support.
Bird, et al., U.S. Pat. No. 5,454,638, issued Oct. 3, 1995, discloses adjustable refrigerator shelving having a shelf rail for supporting a partial width shelf within a refrigerator compartment on first and second, spaced shelf racks vertically oriented in the compartment. The tracks releasably engage with a number of support brackets for cantilever support of one or more shelves at a plurality of vertically spaced locations. The shelf rail includes rearwardly projecting hooks at each of the two opposing ends for releasable engagement with the shelf tracks. Locking tabs are included on the hooks to retain the shelf rails on the track, while a rub strip is provided between the partial shelf and the shelf rail, along a top edge of the shelf rail.
Bird, et al., U.S. Pat. No. 5,429,433, issued Jul. 4, 1995, describes a refrigerator shelf which is adapted for containment of spills on the shelf. The shelf includes a planer shelf member with a rim molded around the perimeter edge of the shelf member to form a liquid tight seal between the rim and the shelf member. The molded rim projects above the top surface of the shelf member to form a liquid dam for containing spills on the shelf member. In one embodiment, the shelf is slidably mounted to allow horizontal extension of the shelf, with access to the rear portion of the shelf using slide guides molded into the rim along each side of the shelf. The shelf is cantilevered upon support brackets from the rear wall of a refrigerator to allow air flow around the shelf sides. The support brackets are adapted to support the shelf at a plurality of vertical positions.
Meier, et al., U.S. Pat. No. 6,120,720, issued Sep. 19, 2000, discloses a method of manufacturing a glass shelf with a plastic edge. The glass panel is placed on a cavity of a mold with a peripheral edge of the cavity corresponding to the peripheral edge of the glass panel. The cavity has side cavity portions, each housing one of the shelf brackets. Plastic material is injected into the cavity adjacent corners, so that the forces of the injected material are essentially self balancing around the peripheral edge of the glass panel. In this manner, the glass panel is maintained in a substantially mating conformity with the cavity to produce a relatively consistently contoured frame.
The foregoing is merely a sample of the various types of prior art references which currently exist with respect to refrigerator shelving.
SUMMARY OF THE INVENTIONIn accordance with the invention, a cooling tube system is provided which is adapted for use within an interior of a refrigeration apparatus. The cooling tube system facilitates distribution of cooling air within the interior of the refrigeration apparatus. The cooling tube system includes at least one cooling tube disposed within the refrigeration apparatus interior. Cooling air generation means are provided for generating a supply of cooling air. Air flow transmission means are provided, and are positioned so as to receive the supply of cooling air. The air flow transmission means also provides for transmitting the supply of cooling air to a position adjacent a first end of at least one cooling tube. In this manner, at least a certain portion of the supply of cooling air is further transmitted into the first end of the cooling tube.
The one cooling tube also includes a second end opening to an interior of the refrigeration apparatus. A portion of the supply of cooling air flows through the second end of the one cooling tube. This air further flows into the interior of the refrigeration apparatus. The cooling air includes temperature and volume properties sufficient so as to provide an improvement of gradient temperature within the refrigeration apparatus. This improvement is relative to the state of the interior of the refrigeration apparatus in the absence of the cooling tube system.
The cooling tube system can comprise a plurality of cooling tubes, with the tubes disposed within an interior of the refrigeration apparatus. A first set of the plurality of cooling tubes can comprise a structural part of at least one refrigerator shelf. The shelf can be positioned within a freezer portion of the interior of the refrigeration apparatus, and the cooling air can comprise temperature and volume properties sufficient so as to provide for an improvement in freeze time for food items placed directly on the shelf, and for food items placed in direct contact with a stream of cooling air flowing into the refrigeration apparatus interior from a second end of at least one of the plurality of cooling tubes. This improvement occurs relative to freeze time which would exist for food items in the absence of the cooling tube system.
In accordance with these aspects of the invention, the improved freeze time can be at least 5%. Further, the improved freeze time can be in the range of 5% to 20%. Still further, the gradient temperature improvement can be at least 5%. Also, the gradient temperature improvement can be in the range of 5% to 25%.
In accordance with yet a further aspect of the invention, a first set of the plurality of cooling tubes can be formed with a straight configuration. Alternatively, a first set of the plurality of cooling tubes can be formed with angle-cut configurations. Still further, the first set of cooling tubes can also comprise formed cooling tubes. The first set of cooling tubes can further be formed with air dam configurations.
The invention will now be described with reference to the drawings, in which:
The principles of the invention are disclosed, by way of example, in certain embodiments of cooling tube systems in accordance with the invention, as illustrated in
Turning to the drawings, a cooling tube system 100 is illustrated in the perspective view of
Secured above and supported on the frame wires 106 are a set of cooling tubes 114. In the particular embodiment illustrated in
To illustrate the spatial relationship and the use of the cooling tube system 100 in a refrigeration apparatus, attention is directed to
In the particular refrigerator 120 illustrated in
As the cooling air 138 flows upwardly through the air corridor 134, it passes through the vents 136. As further illustrated in
The cooling tube systems 100 in accordance with the invention may utilize various configurations of cooling tubes 114. These configurations are primarily illustrated in
A further embodiment of a cooling tube system 100 in accordance with the invention is illustrated in
A still further embodiment of a cooling tube system 100 in accordance with the invention is illustrated in
Various types of cooling tube systems 100 in accordance with the invention have been illustrated and disclosed herein. As described, the cooling tube systems 100 utilize cooling tubes for directing air flow to various sections of compartments of a refrigerator. These compartments may consist of fresh food or freezer compartments of a conventional refrigerator or other type of refrigeration equipment. As further described and illustrated, the cooling tubes of the cooling tube systems 100 act not only to facilitate air flow direction, but also to support, on refrigerator shelving, stored foodstuffs and the like.
As further described herein, the cooling tube systems 100 act in part to redistribute or direct cooling air to “hot spots” within refrigeration units, such as door bins or the like of traditional side-by-side refrigerators. Also, cooling tube systems 100 in accordance with the invention can be designed to redistribute air in various directions. This can be achieved by placing the cooling tubes at various angles, and could include forming the tubes at each end. In this regard, although not particularly shown in
With the forgoing, cooling tube systems 100 in accordance with the invention assist in maintaining more predictable temperature gradients within a refrigerator, as a result of directed air flow. Still further, the refrigerator shelves 102 utilizing the cooling tube systems 100 can create air curtains which lead to more efficient use of refrigerator units, and potential energy usage reduction. Still further, with the cooling tube systems 100 in accordance with the invention, more rapid cooling of food items placed directly on the cooling tubes themselves will occur, as oppose to traditional shelving methods.
In accordance with the foregoing description, the components of the refrigerator 120 which are utilized to generate the cooling air can be characterized as cooling air generation means. Also, components of the refrigerator 120 which facilitate air flow to the cooling tubes 114 can be characterized as air flow transmission means. This air flow transmission means can further be characterized as receiving the cooling air 138 and transmitting the same to positions adjacent ends of the cooling tubes 114. As also described herein, the cooling air can have temperature and volume properties sufficient so as to provide an improvement of gradient temperature within the refrigerator 120. This is an improvement relative to the state of the interior of the refrigerator 120 which would exist in the absence of the cooling tube system 100. In this regard, it is believed that cooling tube systems in accordance with the invention can achieve gradient temperature improvements in a range of at least 5% to 25%.
Still further, and as earlier stated herein, the cooling tubes 114 can be utilized within freezer portions of the refrigerator 120. In this regard, the cooling air can comprise temperature and volume properties which are sufficient so as to achieve an improved freeze time, particularly for food items which are placed directly on a refrigerator shelf having a structural part formed by the cooling tubes 114. Also, this freeze time improvement would occur for food items which were placed in direct contact with the stream of cooling air flowing into the freezer portion from the cooling tubes 114. In this regard, it is believed that with appropriate temperature and volume properties, cooling tube systems in accordance with the invention can provide for an improved freeze time in the range of at least 5% to 20%. This is an improvement relative to freeze time which would exist for the frozen food items in the absence of the use of a cooling tube system 100 in accordance with the invention.
In this regard, it should be noted that cooling tube systems in accordance with the invention do not require any “special” or “oversized” fans or specially designed cooling air corridors 134 to properly function. Conventional apparatus within conventional refrigerators can be used to generate the cooling air. No “special” air flow volume or air speed is required. Further, the cooling air temperature can be conventional. For example, the temperature of the cooling air may be in the range of −15° F. to 5° F. when first applied to the cooling tubes. However, the invention is not limited to specific air flow volumes or temperatures.
It will be apparent to those skilled in the pertinent arts that other embodiments of cooling tube systems in accordance with the invention can be designed. That is, the principles of cooling tube systems in accordance with the invention are not limited to the specific embodiments described herein. Accordingly, it will be apparent to those skilled in the art that modifications and other variations of the above-described illustrative embodiments of the invention may be effected without departing from the spirit and scope of the novel concept of the invention.
Claims
1. A cooling tube system adapted for use within an interior of a refrigeration apparatus, for facilitating distribution of cooling air within said interior, said cooling tube system comprising:
- at least one cooling tube disposed within said interior of said refrigeration apparatus;
- cooling air generation means for generating a supply of cooling air; air flow transmission means positioned so as to receive said supply of cooling air and for transmitting said supply of cooling air to a position adjacent a first end of said at least one cooling tube, so that at least a certain portion of said supply of cooling air is further transmitted into said first end of said cooling tube;
- said at least one cooling tube having a second end opening to said interior of said refrigeration apparatus;
- said certain portion of said supply of cooling air flowing through said second end of said at least one cooling tube, and into said interior of said refrigeration apparatus; and
- said cooling air having temperature and volume properties sufficient so as to provide an improvement of gradient temperature within said refrigeration apparatus, relative to the state of said interior of said refrigeration apparatus in the absence of said cooling tube system.
2. A cooling tube system in accordance with claim 1, characterized in that said cooling tube system comprises a plurality of cooling tubes disposed within said interior of said refrigeration apparatus.
3. A cooling tube system in accordance with claim 2, characterized in that a first set of said plurality of cooling tubes comprises a structural part of at least one refrigerator shelf.
4. A cooling tube system in accordance with claim 3, characterized in that said at least one refrigerator shelf is positioned within a freezer portion of said interior of said refrigeration apparatus, and said cooling air comprises temperature and volume properties sufficient so as to provide for an improvement in freeze time for food items placed directly on said at least one refrigerator shelf, and for food items placed in direct contact with a stream of said cooling air flowing into said refrigeration apparatus interior from a second end of at least one of said plurality of cooling tubes, relative to freeze time which would exist for said food items in the absence of said cooling tube system.
5. A cooling tube system in accordance with claim 4, characterized in that said improved freeze time is at least 5%.
6. A cooling tube system in accordance with claim 4, characterized in that said improved freeze time is in the range of 5% to 20%.
7. A cooling tube system in accordance with claim 1, characterized in that said gradient temperature improvement is at least 5%.
8. A cooling tube system in accordance with claim 1, characterized in that said gradient temperature improvement is in the range of 5% to 25%.
9. A cooling tube system in accordance with claim 2, characterized in that a first set of said plurality of cooling tubes are formed with a straight configuration.
10. A cooling tube system in accordance with claim 2, characterized in that a first set of said plurality of cooling tubes are formed with angle-cut configurations.
11. A cooling tube system in accordance with claim 2, characterized in that a first set of said cooling tubes comprise formed cooling tubes.
12. A cooling tube system in accordance with claim 2, characterized in that a first set of said plurality of cooling tubes are formed with air dam configurations.
13. A cooling tube system in accordance with claim 3, characterized in that said first set of said plurality of cooling tubes are positioned so as to provide for shelving support of food items placed on said at least one refrigerator shelf.
Type: Application
Filed: Aug 8, 2008
Publication Date: Jun 25, 2009
Inventor: Matthew J. McMillin (New Albany, IN)
Application Number: 12/188,691
International Classification: F25D 17/04 (20060101); F25D 25/02 (20060101);