U.S. patent application number 09/413428 was filed with the patent office on 2001-12-06 for reach-in cooler.
Invention is credited to FLYNN, PETER C., MASHBURN, SHELDON F., WALKER, RICHARD NEIL.
Application Number | 20010047660 09/413428 |
Document ID | / |
Family ID | 23637191 |
Filed Date | 2001-12-06 |
United States Patent
Application |
20010047660 |
Kind Code |
A1 |
MASHBURN, SHELDON F. ; et
al. |
December 6, 2001 |
REACH-IN COOLER
Abstract
A preferred embodiment of the reach-in cooler incorporates a
roof structure which includes a ceiling and a roof that are spaced
from each other to form an air distribution plenum. The air
distribution plenum includes an air return inlet and an air
distribution outlet, and communicates with air return passage via
the air return inlet. Preferably, the air return passage is formed
between the back of the cooler and a partition. The refrigerated
space of the cooler is disposed below the roof structure and
communicates with the air return passage. Additionally, a
refrigeration unit, which includes a refrigeration coil and a fan,
communicates with the air return passage so that the fan moves air
from the refrigerated space, through said air return passage,
through the air return inlet and into the air distribution plenum.
The air then is directed through the refrigeration coils for
delivery through the air distribution outlet and into the
refrigerated space for cooling the refrigerated space. Preferably,
the partition incorporates air return orifices so that the fan
draws air from the refrigerated space through the air return
orifices and into the air return passage. Back-to-back
configurations and method aspects also are provided.
Inventors: |
MASHBURN, SHELDON F.;
(SOCIAL CIRCLE, GA) ; FLYNN, PETER C.;
(LAWRENCEVILLE, GA) ; WALKER, RICHARD NEIL;
(MONROE, GA) |
Correspondence
Address: |
GEORGE M THOMAS
THOMAS KAYDEN HORSTEMEYER & RISLEY
100 GALLERIA PARKWAY N W #1500
ATLANTA
GA
303395948
|
Family ID: |
23637191 |
Appl. No.: |
09/413428 |
Filed: |
October 6, 1999 |
Current U.S.
Class: |
62/256 |
Current CPC
Class: |
A47F 3/0408
20130101 |
Class at
Publication: |
62/256 |
International
Class: |
A47F 003/04 |
Claims
1. A reach-in cooler for containing refrigerated products,
comprising: a roof structure, a base, a front and a back; said roof
structure having a ceiling and a roof, said ceiling and said roof
being spaced from each other and forming an air distribution plenum
therebetween, said air distribution plenum having an air return
inlet and an air distribution outlet; a partition spaced from said
back and forming a first air return passage therebetween, said
first air return passage engaging in fluid communication with said
air distribution plenum via said air return inlet; a refrigerated
space disposed below said roof structure and defined by said
ceiling, said base, said front and said partition, said
refrigerated space engaging in fluid communication with said first
air return passage; a refrigeration unit having a refrigeration
coil and a fan, said refrigeration unit engaging in fluid
communication with said first air return passage such that said fan
moves air from said refrigerated space, through said first air
return passage, through said air return inlet and into said air
distribution plenum, and then through said refrigeration coils for
delivery through said air distribution outlet and into said
refrigerated space for cooling said refrigerated space; said
partition having air return orifices formed therethrough such that
said fan draws air from said refrigerated space through said air
return orifices and into said first air return passage.
2. The reach-in cooler of claim 1, wherein said partition has a
lower end, said lower end being spaced from said base to form a
return opening such that said fan draws air from said refrigerated
space through said return opening and into said first air return
passage.
3. The reach-in cooler of claim 1, wherein said base has a tank and
a floor spaced from said tank and forming a second air return
passage therebetween, said refrigerated space engaging in fluid
communication with said second air return passage such that said
fan draws air from said refrigerated space through second air
return passage and into said first air return passage.
4. The reach-in cooler of claim 1, wherein said front has a display
opening and a door, said display opening adapted and arranged for
providing access to said refrigerated space, said door hingedly
mounted to said front and movable between an opened and a closed
position, in said closed position said door preventing access
through said display opening to said refrigerated space.
5. The reach-in cooler of claim 4, wherein said air distribution
outlet has a nozzle such that air delivered from said air
distribution plenum and into said refrigerated space passes through
said nozzle and forms an air curtain extending downwardly adjacent
said display opening within said refrigerated space.
6. The reach-in cooler of claim 1, wherein said reach-in cooler has
a support structure configured for providing structural support
thereto, said support structure having a plurality of framing
sections, said framing sections being arranged in a spaced
relationship with each other, each of said framing sections having
first and second vertical framing members and first and second
joists, said first and second vertical framing members being spaced
from each other and forming said first air return passage, said
first and second joists extending outwardly from said first and
second vertical framing members toward said front face, said first
and second joists being spaced from each other and forming said air
distribution plenum.
7. A reach-in cooler for containing refrigerated products,
comprising: first and second cooler structures, each of said cooler
structures having a roof structure, a base, a front and a back,
said cooler structures being arranged in a back-to-back
configuration with each other such that said first cooler defines a
first refrigerated space and said second cooler defines a second
refrigerated space with a common air return passage disposed
between said first and second refrigerated spaces, said first air
return passage being defined by first and second partitions, each
of said roof structures having a ceiling and a roof spaced from
each other and forming an air distribution plenum therebetween such
that, in said back-to-back configuration, said air distribution
plenums of said first and second coolers engage in fluid
communication with each other to form a common air distribution
plenum, said common air distribution plenum having an air return
inlet and first and second air distribution outlets, said first air
distribution outlet being arranged adjacent to said front of said
first cooler structure, said second air distribution outlet being
arranged adjacent to said front of said second cooler structure;
said common air return passage engaging in fluid communication with
said common air distribution plenum via said air return inlet; a
refrigeration unit having first and second refrigeration coils and
a fan disposed therebetween, said first refrigeration coil being
arranged above said first refrigerated space, said second
refrigeration coil being arranged above said second refrigerated
space, said refrigeration unit engaging in fluid communication with
said common air return passage such that said fan moves air from
said first and second refrigerated spaces, through said common air
return passage, through said air return inlet and into said common
air distribution plenum, and then through said first and second
refrigeration coils for delivery through said first and second air
distribution outlets and into said first and second refrigerated
spaces for cooling said refrigerated spaces; said first and second
partitions having air return orifices formed therethrough such that
said fan draws air from said first and second refrigerated spaces
through said air return orifices and into said common air return
passage.
8. The reach-in cooler of claim 7, wherein said base of said first
cooler structure has a floor and a first air return passage formed
below said floor, said first air return passage engaging in fluid
communication with said common air return passage, and wherein said
base of said second cooler structure has a floor and a second air
return passage formed below said floor, said second air return
passage engaging in fluid communication with said common air return
passage such that said fan draws air from said first refrigerated
space through said first air return passage and into said common
air return passage, and said fan air from said second refrigerated
space through said second air return passage and into said common
air return passage.
9. The reach-in cooler of claim 7, wherein said reach-in cooler has
a support structure configured for providing structural support
thereto, said support structure having a plurality of framing
sections, said framing sections being arranged in a spaced
relationship with each other, each of said framing sections having
first and second vertical framing members and first and second
joists, said first and second vertical framing members being spaced
from each other and forming said common air return passage, said
first and second joists extending outwardly from said first and
second vertical framing members toward said fronts of said first
and second cooler structures, said first and second joists being
spaced from each other and forming said common air distribution
plenum.
10. A method for displaying refrigerated products, comprising the
steps of: providing first and second cooler structures, each of
said cooler structures having a ceiling, a floor, a front, a back,
and a partition spaced form said back, said first cooler defining a
first refrigerated space and said second cooler defining a second
refrigerated space; arranging said first and second cooler
structures in a back-to-back configuration with each other such
that a common air return passage is formed therebetween, said
common air return passage being defined by said partitions of said
first and second cooler structures, moving air from said first and
second refrigerated spaces, upwardly through said common air return
passage and above said ceilings of said cooler structures; cooling
the air, and; delivering the cooled air outwardly toward said
fronts of said cooler structures and then downwardly into said
first and second refrigerated spaces for cooling said refrigerated
spaces.
11. The method of claim 10, further comprising the steps of:
drawing portions of the air delivered into said first and second
refrigerated spaces into said common air return passage at a
plurality of distances measured along said partitions from said
ceilings, and; drawing additional portions of the air delivered
into said first and second refrigerated spaces across said floors
of said first and second cooler structures and into said common air
return passage.
12. The method of claim 11, wherein the step of drawing portions of
the air delivered into said first and second refrigerated spaces
comprises drawing portions of the air across shelving and into said
common air return passage, said shelving extending into said first
and second refrigerated spaces from said partitions.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to refrigerated
structures for the display of refrigerated products. More
specifically, the present invention relates to a reach-in cooler
which provides a refrigerated space free of refrigeration
components.
[0003] 2. Description of the Related Art
[0004] Refrigerated cabinets are well known in the retail grocery
industry. These devices provide locations for food product display
and provide consumer access to refrigerated food products while
they maintain the food products at adequately cold temperatures to
prevent spoiling. The term "refrigerated" as used herein applies
equally to devices for cooling products below room temperature,
both at medium temperature (above 0.degree. F.) and at low
temperature (below 0.degree. F.).
[0005] Prior art refrigerated cabinets of a reach-in type typically
are one-sided cabinets constructed of metal framing surrounded by
insulating material and a thin metal protective cladding.
Additionally, the cabinets include one or more insulated glass
doors mounted on hinges along a display side of the cabinet. So
configured, a consumer may open the glass doors and reach into the
refrigerated interior of the cabinet and retrieve food products
displayed on shelving mounted within the cabinet.
[0006] A typical prior art reach-in cabinet incorporates its
refrigeration coil, fan assembly and associated elements, sometimes
referred to as refrigeration unit, at the base or in the partition
of the cabinet. The refrigeration unit provides a flow of
refrigerated air to the interior of the cabinet, thus allowing a
proper temperature to be maintained within the cabinet. A
refrigeration unit, however, must be defrosted on a routine basis
which requires that the refrigeration unit be shut off, thereby
depriving the cabinet of the flow of cooling air normally provided
by the refrigeration unit. Normally, however, the period of
refrigeration unit shut-off due to defrosting is relatively short
and does not require that food products be removed from the cabinet
due to an associated rise in temperature of the refrigerated
interior of the cabinet.
[0007] Typically, repair or maintenance of a prior art refrigerated
display cabinet also requires that the refrigeration unit be shut
off, and, oftentimes, requires taking the entire cabinet out of
service for a prolonged period of time. In these instances,
unloading the food products displayed in the cabinet may be
necessitated because servicing of the cabinet may last longer than
the time that would cause spoilage of the food products displayed
in the cabinet. Thus, unless the food products are moved to another
refrigerated location, the products may warm, thaw and spoil.
Unloading of the food products and placing the products in a
suitable refrigerated location usually involves a significant
amount of labor and results in the inability to display and sell
products from the cabinet until the refrigeration unit is returned
to service.
[0008] Since the refrigeration units of some of the prior art
reach-in cabinets are housed at the base of the cabinets, a
significant amount of labor also may be expended because at least a
portion of the food products displayed within such a cabinet must
be removed from the cabinet to allow access to the refrigeration
unit. Additionally, it may be necessary to clean the cabinet
interior prior to performing maintenance or repair on such a
refrigeration unit because debris and spilled liquids can
accumulate in the base of the cabinet during normal operations.
This cleaning process can consume valuable employee labor hours
since each cabinet also must be cleaned on a regular basis in order
to comply with governmental and industry health standards.
[0009] Therefore, there is a need to provide improved reach-in
coolers which address these and other shortcomings of the prior
art.
BRIEF SUMMARY OF THE INVENTION
[0010] Briefly described, the present invention is directed to a
reach-in cooler for containing refrigerated products. In a
preferred embodiment, the reach-in cooler incorporates a roof
structure which includes a ceiling and a roof that are spaced from
each other to form an air distribution plenum. The air distribution
plenum includes an air return inlet and an air distribution outlet,
and communicates with air return passage via the air return inlet.
Preferably, the air return passage is formed between the back face
of the cooler and a partition. The refrigerated space of the cooler
is disposed below the roof structure and communicates with the air
return passage. Additionally, a refrigeration unit, which includes
a refrigeration coil and a fan, communicates with the air return
passage so that the fan moves air from the refrigerated space,
through said air return passage, through the air return inlet and
into the air distribution plenum. The air then is directed through
the refrigeration coils for delivery through the air distribution
outlet and into the refrigerated space for cooling the refrigerated
space. Preferably, the partition incorporates air return orifices
so that the fan draws air from the refrigerated space through the
air return orifices and into the air return passage.
[0011] In accordance with another aspect of the present invention,
a preferred embodiment of the reach-in cooler is configured as a
back-to-back cooler formed from two or more single-sided cooler
structures that are arranged in a back-to-back configuration with
each other. Preferably, a common air return passage is formed
between the single-sided cooler structures.
[0012] A preferred method aspect of the present invention includes
the steps of: (1) providing first and second cooler structures; (2)
arranging the first and second cooler structures in a back-to-back
configuration with each other so that a common air return passage
is formed therebetween; (3) moving air from the refrigerated spaces
of the cooler structures, upwardly through the common air return
passage and above ceilings of the cooler structures; (4) cooling
the air, and; (5) delivering the cooled air outwardly toward the
fronts of the cooler structures and then directing the air
downwardly into the refrigerated spaces of the cooler structures.
In some embodiments, the method preferably includes the steps of
drawing portions of the air delivered into the refrigerated spaces
into the common air return passage at various locations along the
partitions of the cooler structures, and then drawing additional
portions of the air delivered into the refrigerated spaces across
the floors of the cooler structures and into the common air return
passage.
[0013] Other objects, features and advantages of the present
invention will become apparent upon reading the following
specification, when taken in conjunction with the accompanying
drawings.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0014] The accompanying drawings incorporated in and forming a part
of the specification illustrate several aspects of the present
invention, and together with the description serve to explain the
principles of the invention. The components in the drawings are not
necessarily to scale, emphasis instead being placed upon clearly
illustrating principles of the present invention. In the drawings
appended hereto, like numerals illustrate like parts throughout the
several views.
[0015] FIG. 1 illustrates a perspective view of a preferred
embodiment of the present invention.
[0016] FIG. 2 illustrates a cross-sectional end view of the
embodiment of FIG. 1, showing detail of the refrigeration unit and
representative air flows.
[0017] FIG. 3 illustrates a perspective view of a preferred
embodiment of the present invention with duplicate one-sided
reach-in coolers arranged in a back-to-back configuration.
[0018] FIG. 4 illustrates a cross-sectional end view of the
embodiment of FIG. 3, showing detail of the refrigeration unit and
representative air flows.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0019] Reference will now be made in detail to the description of
the invention as illustrated in the drawings. As shown in FIGS. 1
and 2, a preferred embodiment of the reach-in cooler 10 of the
present invention is configured as a free-standing structure with a
display wall or front 12, a rear wall or back 14, opposing side
walls 16 and 18, a base 20, and a roof 22. Front 12 typically is
formed of a framework which defines one or more display openings 24
for providing access to an interior refrigerated space 28 and which
are adapted to receive product access doors 26, preferably formed
as thermally insulated glass doors. Being capable of numerous other
configurations, front 12, as used herein, refers to that portion of
a cooler that provides access to the refrigerated space of the
cooler such that a consumer may access products displayed within
the cooler by reaching into the front of the cooler. Additionally,
side walls 16 and 18 can be covered, such as with cladding, or can
be abutted with other coolers.
[0020] Refrigerated space 28 is bounded by front 12, sides 16 and
18, a partition 30, a floor 32, and a ceiling 34, and is sized and
shaped for the display and storage of products which typically are
placed upon shelves 36 and product racks 38. Typically, shelves 36
and racks 38 are mounted to partition 30 and extend into the
refrigerated space 28 toward display face 12. Support for the
shelves 36 is provided by a support frame 40 which includes a
plurality of vertical framing members 42, a horizontal framing
member or beam 44, which preferably interconnects upper ends of the
vertical framing members 42, and a plurality of joists 46 extending
transversely, outwardly across the beam 44.
[0021] As shown in greater detail in FIG. 2, reach-in cooler 10
incorporates a horse 48 which provides a set of wheels 50 that
allow the cooler to be maneuvered during installation and/or
repair. A drain pan or tank 52 is affixed to the horse, with the
tank 52 and horse 48 forming the base 20 of the cooler. Preferably,
tank 52 is provided with a drain 53.
[0022] As shown in the embodiment of FIG. 2, lower ends of the
vertical framing members 42 are attached to the upper surface of
tank 52. Preferably, the vertical framing members 42 are arranged
toward the back 14 of the cooler and are spaced therefrom so that
an upper air return passage 54 is formed between back 14 and
vertical framing members 42. The upper air return passage 54 also
is defined by one or more partition panels 56 which preferably are
affixed to the vertical framing members 42. Preferably, each of the
partition panels 56 incorporates a pair of holes 57 which are sized
and shaped for the insertion of fingers of an operator so that the
panels may easily be grasped during installation and/or
removal.
[0023] Upper air return passage 54 preferably communicates with a
lower air return passage 58 which preferably is formed between
floor 32 and the tank 52. Thus, the lower air return passage 58 and
the upper air return passage 54 cooperate to provide a corridor
through which a flow of air from the refrigerated space 28 may
travel as it returns to a refrigeration unit 60, which is mounted
above the ceiling 34 of the cooler. A lower edge of each of the
partition panels 56 also may be spaced from the floor 32 to provide
an enlarged return opening 61 through which return air may flow in
order to merge with the return air of the upper air return passage
54.
[0024] Refrigeration unit 60 includes a fan 62 and an evaporator
coil 64, with the evaporator coil preferably being oriented between
the fan 62 and a front header 66. The refrigeration unit 60
preferably is contained within an air distribution plenum 68 which
is bounded by ceiling 34, front header 66, roof 22 and back 14.
Refrigeration unit 60 can incorporate various combinations of fans
and evaporator coils, including a plurality of fans per coil, as
well as a plurality of evaporator coils per fan. Thus, in a cooler
with a multi-coiled refrigeration unit, when an evaporator coil 64
needs to be taken out of service, such as for defrosting, repair,
etc., cold air may still be produced by the refrigeration unit as
air from the fan can be provided to the evaporator coils remaining
in service. So configured, food products may be retained within the
refrigerated space 28 versus relocating the food products to
another refrigerated space during servicing.
[0025] Support frame 40 is sufficiently robust to support the
refrigeration unit 60 above and outside the refrigerated space 28
of the cooler and preferably also is structurally sound so as to
support the weight of various maintenance personnel and associated
equipment who typically will access the refrigeration unit 60 via
the roof 22. To provide access to refrigeration unit 60, one or
more refrigeration unit access doors 78 are provided on the roof 22
of the cooler. So provided, maintenance personnel may access the
refrigeration unit without having to situate themselves and their
tools in the consumer aisle ways adjacent the display face of the
cooler. Additionally, since the refrigeration unit 60 preferably is
located outside and above the refrigerated space 28, food products
stored within the refrigerated space of the cooler do not need to
be removed in order to provide access to the refrigeration
unit.
[0026] As described hereinbefore, air from the refrigerated space
28 is drawn into the lower air return passage 58 and then is
directed upwardly up through the upper air return passage 54 and
into the air distribution plenum 68. Once in the air distribution
plenum 68, the air is drawn into the fan 62 and then is directed
across the various cooling coils of the evaporator coil 64 and
toward the front header 66. The cold air departing the evaporator
coil 64 then is directed downwardly through one or more nozzles 70
to produce a downwardly directed air curtain 72 which is formed
from the coldest air of the cooler, e.g. the air departing the
evaporator coil 64.
[0027] The air curtain 72 provides an air flow and temperature
barrier between the relatively moist, ambient air surrounding the
cooler 10 and the relatively cool, dry air within the refrigerated
space 28 that functions to inhibit the refrigerated air within the
refrigerated space and the ambient air outside the refrigerated
space from intermixing, even while the product access doors 26 are
open. As shown in FIG. 2, a portion of the air curtain 72 tends to
flow downwardly adjacent the inner side of the doors 26 and then
enters an inlet 74 of the horizontal air return passage 58.
Additional portions of the air of the air curtain 72 are drawn
inwardly toward the partition 30 by a series of air return orifices
76 which are formed through the partition 30. The air return
orifices 76 allow the fan 62 to exert a drawing force or suction
through the orifices 76 and into the refrigerated space, thus
urging some of the air from the refrigerated space to flow toward
the partition 30, through the orifices and into the upper air
return passage 54 for return to the air distribution plenum 68. In
order that the cold air departing the nozzles 70 does not reenter
the upper air return passage 54 at locations immediately adjacent
the fan 62, and thus potentially short-circuiting the circulation
of air throughout the refrigerated space 28, e.g. preventing the
coldest air of the air curtain 72 from flowing downwardly to the
bottom portion of the refrigerated space, orifices 76 preferably
are formed through the partition panels 56 at locations which are
sufficiently spaced from the nozzles 70.
[0028] As shown in FIG. 3, single sided reach-in cooler embodiments
can be arranged in a back-to-back configuration to form a
back-to-back reach-in cooler 100. As shown in greater detail in
FIG. 4, the back-to-back reach-in coolers 100 preferably are formed
by removing back faces (described hereinbefore) of each of the
single-sided coolers 10 and then affixing each of the single-sided
units together. Once so affixed, the individual upper air return
passages of the single-sided units merge to form a unitary, central
air return passage 102 which directs return air from each of the
refrigerated spaces 28 to a common air distribution plenum 104,
which is formed from the air distribution plenums 68.
[0029] Some embodiments of the back-to-back cooler 100 can be
constructed with various components utilized in the construction of
the single-sided cooler units 10. In particular, the coolers 100
can incorporate the horse, tank, doors and various other
components, with the components being incorporated into the cooler
100 in various stages of pre-assembly. Preferably, these
back-to-back coolers (FIG. 4) incorporate support frames 110 which
generally are configured as T-shaped structures that are spaced
from each other along the length of the cooler 100. Each support
frame 110 includes a pair of vertical framing members 112 which are
spaced from each other so as to form the central air return passage
102, and a joist 114 which preferably is configured to span the
entire width of the cooler. Joists 114 preferably are affixed at
upper ends of the vertical framing members 112 and serve as
supports for the ceiling and the refrigeration unit, described
hereinafter.
[0030] The refrigeration unit of the cooler 100 is arranged within
the common air distribution plenum 104. Preferably, the
refrigeration unit incorporates pairs of evaporator coils 64, with
one of the coils of a pair of coils being oriented between the
central air return passage and a front header 66 of the cooler, and
the other of the coils of the pair of coils being oriented between
the central air return passage and the other front header 66.
Additionally, the fans 62 of the refrigeration unit preferably are
oriented between the evaporator coils 64, such as above the central
air return passage 102, for instance, so that the fans direct
return air from the central air return passage outwardly through
each of the evaporator coils 64 toward the opposed front headers 66
of the cooler. Once cooled by the evaporators, the refrigerated air
approaching the headers 66 is directed downwardly through the
nozzles 70 to produce air curtains adjacent the opposing display
faces of the cooler 100. The downwardly directed air of the air
curtains then flows through the respective refrigerated spaces 28
as described hereinbefore. The air from the refrigerated spaces 28
is then ultimately returned to the central air return passage 102
for recirculation through the various coils of the refrigeration
unit.
[0031] The foregoing description has been presented for purposes of
illustration and description. It is not intended to be exhaustive
or to limit the invention to the precise forms disclosed. Obvious
modifications or variations are possible in light of the above
teachings. The embodiment or embodiments discussed were chosen and
described to provide the best illustration of the principles of the
invention and its practical application to thereby enable one of
ordinary skill in the art to utilize the invention in various
embodiments and with various modifications as are suited to the
particular use contemplated. All such modifications and variations,
among others, are within the scope of the invention as determined
by the appended claims when interpreted in accordance with the
breadth to which they are fairly and legally entitled.
* * * * *