U.S. patent number 3,665,727 [Application Number 05/071,991] was granted by the patent office on 1972-05-30 for sectionalized self-contained air conditioning unit.
This patent grant is currently assigned to The Trane Company. Invention is credited to John C. Mather.
United States Patent |
3,665,727 |
Mather |
May 30, 1972 |
SECTIONALIZED SELF-CONTAINED AIR CONDITIONING UNIT
Abstract
An air-cooled condenser section has its own support pan capable
of supporting the components of the condenser section independently
of the evaporator section. The evaporator has a subframe which
extends outwardly therefrom for attachment in underlying
relationship to the condenser section to thereby define a
self-contained unitary air conditioning unit. The evaporator
section has a recessed sidewall defining a channel for conducting
cooling air to a portion of the condenser section embraced by the
evaporator section. Vertically oriented compressor, heat
exchangers, and blowers in both evaporator and condenser sections
permit the use of the same size bottoms, tops, and subframe for
different size units.
Inventors: |
Mather; John C. (Clarksville,
TN) |
Assignee: |
The Trane Company (La Crosse,
WI)
|
Family
ID: |
22104878 |
Appl.
No.: |
05/071,991 |
Filed: |
September 14, 1970 |
Current U.S.
Class: |
62/262;
62/298 |
Current CPC
Class: |
F24F
1/029 (20190201); F24F 1/0323 (20190201); F24F
1/0325 (20190201) |
Current International
Class: |
F24F
1/02 (20060101); F25d 023/12 () |
Field of
Search: |
;62/262,298,302,408 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Perlin; Meyer
Claims
I claim:
1. Refrigeration apparatus comprising:
an evaporator section having a housing; a refrigerant evaporator
heat exchanger disposed in said housing; a first blower disposed in
said housing for passing air in heat exchange relation with said
refrigerant evaporator heat exchanger; and a first motor drivingly
connected to said first blower; a frame supportingly connected to
said refrigerant evaporator heat exchanger, said first blower, said
first motor and said housing, said frame being disposed below said
housing and extending horizontally substantially beyond said
housing; an air cooled condenser section having a refrigerant
condenser heat exchanger; a refrigerant compressor; a second blower
disposed to pass cooling air over said condenser heat exchanger; a
second motor drivingly connected to said second blower; and a
support pan means disposed below said compressor and said condenser
heat exchanger for supporting said condenser heat exchanger, said
compressor, said second blower and said second motor independently
of said evaporator section; the extending portion of said frame
being disposed below and connected to said support pan means of
said condensing unit.
2. Refrigeration apparatus comprising: a condensing section having
a generally rectangular pan-like frame, and an air-cooled
refrigerant condenser heat exchanger disposed on said frame and
having a plurality of substantially vertical faces adjacent a
plurality of margins of said pan-like frame; an evaporator section
abutting said condenser section at one of said plurality of
vertical faces of said condenser heat exchanger and having a
housing including top, bottom and sidewalls, one of said sidewalls
being disposed inwardly of the edges of said top and bottom walls
to define a channel for conducting condenser cooling air for that
portion of said condenser heat exchanger over which said evaporator
section lies.
3. The apparatus as defined by claim 2 including a subframe
underlying said evaporator section housing and extending
horizontally beyond said housing to support said pan-like frame of
said condenser section.
4. A self-contained air conditioning unit comprising in
combination: an air-cooled condenser heat exchanger having a
generally vertical face, an air cooling evaporator heat exchanger
having a generally vertical face, a first blower disposed to rotate
about a vertical axis for passing air through said condenser heat
exchanger, a reciprocating compressor having a crankshaft disposed
to rotate about a vertical axis, and a centrifugal blower having a
cylindrical housing for which the generatrix is vertical and an
impeller disposed to rotate within said housing about a vertical
axis for passing air through said evaporator heat exchanger, said
vertical axes of said first blower, said impeller and said
compressor all being spaced horizontally from each other and all
being spaced horizontally from said vertical faces of said
condenser and evaporator heat exchangers, and said vertical faces
of said condenser and said evaporator heat exchangers being spaced
horizontally from each other.
5. Refrigeration apparatus comprising: an air-cooled refrigerant
condensing section having a generally rectangular pan-like frame,
an air-cooled refrigerant condenser heat exchanger disposed on said
frame and having a plurality of substantially vertical faces
adjacent plural margins of said pan-like frame; and a refrigerant
evaporator section abutting said condenser section at one of said
plurality of vertical faces of said condenser heat exchanger and
having a housing including sidewalls and a generally rectangular
bottom wall, a refrigerant evaporator heat exchanger disposed
within said housing, a first of said sidewalls being generally
parallel to one edge of said rectangular bottom and being provided
with air inlet and outlet openings to conduct air to and from said
evaporator heat exchanger, a second of said sidewalls disposed
opposite said first sidewall having a first portion disposed a
relatively greater distance from said first sidewall than a second
portion thereof, said second portion of said second sidewall being
disposed in face-to-face spaced relationship with said one face of
said condenser heat exchanger to thereby define an air conducting
channel to said one face of said condenser heat exchanger, and a
centrifugal evaporator blower disposed between said one portion of
said second sidewall and said first sidewall for passing air from
said inlet opening over said evaporator heat exchanger to said
outlet opening.
6. Air conditioning apparatus comprising: an evaporator section
including a unit housing having top, bottom, and sidewalls, an
evaporator heat exchanger disposed within said unit housing, inlet
and outlet openings in sidewalls of said unit housing disposed in
horizontal side-by-side relationship, a centrifugal blower within
said unit housing having a cylindrical housing for which the
generatrix is generally vertical and an impeller wheel within said
blower housing disposed to rotate about a vertical axis, said
evaporator heat exchanger being positioned in a fluid path between
said inlet opening of said unit housing and said inlet opening of
said blower housing.
7. The apparatus as defined by claim 6 wherein said bottom wall is
generally rectangular and said inlet and outlet opening are
disposed in a common plane generally parallel to one edge of said
bottom wall and said blower housing extending into the space
defined by said blower inlet opening projected inwardly of said
unit housing normally of said common plane.
Description
BACKGROUND OF THE INVENTION
A great many residential and small commercial central type air
conditioning systems produced today are of the type known as a
split system wherein the condenser section containing an air-cooled
refrigerant condenser heat exchanger, a refrigerant compressor, and
a condenser fan or blower are mounted usually outdoors as a unit
remote from the evaporator section which usually is disposed in the
plenum of the furnace associated with the conditioned space.
Another type of air conditioning system in common use today is the
self-contained unit in which the components immediately associated
with both the evaporator and condenser are mounted on one common
bottom wall or frame of a common housing. Such units may be mounted
in crawl spaces, on the roof, or on a slab immediately adjacent the
structure to be air conditioned. The air to be conditioned is
ducted to and from the self-contained unit.
The existance of these two basic types of residential and small
commercial air conditioning equipment has lead most manufacturers
to produce two completely separate lines of products requiring
substantially completely separate tooling and production lines for
the two products. The duplicated costs are multiplied in most cases
where different size units are made available. These costs must
ultimately be reflected in the consumer prices of this residential
and small commercial air conditioning equipment.
SUMMARY OF THE INVENTION
The primary objective achieved by the instant invention is to
provide a self-contained type air conditioning unit which utilizes
the basic structure of a split system condensing unit in
combination with an evaporator section attachment whereby much of
the tooling cost can be avoided.
Another object of the invention is to orient all components
including the compressor, condenser, evaporator, condenser fan and
evaporator fan in an altitude so that size variations vary
primarily their vertical extent so that same top and bottom walls
as well as subframe structure can be used for different size
units.
Another object of the instant invention is to provide means
associated with the evaporator section for conducting condenser
cooling air for that portion of the condenser section which is
embraced by the evaporator section attachment.
Other objects and advantages will become apparent as this
specification proceeds to describe the invention with reference to
the drawings in which like reference numerals designate like parts
throughout wherein:
FIG. 1 is a perspective of the self-contained air conditioning unit
embodying the invention;
FIG. 2 is an exploded perspective showing the separate condenser
and evaporator sections of the air conditioning unit of FIG. 1.
Also the evaporator blower has been slid outwardly from the
evaporator section;
FIG. 3 is a plan view of the air conditioning unit of FIG. 1 having
the top panels and condenser discharge grill removed;
FIG. 4 is an elevational showing one side of the air conditioning
unit of FIG. 3 having side panels thereof removed and portions of
the compressor sectioned; and
FIG. 5 is an elevation showing the other side of the air
conditioning unit of FIG. 3 particularly showing the air inlet
opening of a channel within the evaporator section for conducting
air to the condenser section.
DETAILED DESCRIPTION
Now referring to the drawing it will be seen that the
self-contained air conditioning unit 10 is comprised of an
air-cooled refrigerant condensing section 12 and an air-cooling
refrigerant evaporator section 14.
The condenser section 12 includes a rectangular base or support pan
16 of sufficient rigidity to support, as an independent unit, the
U-shaped fin-and-tube type air-cooled refrigerant condenser heat
exchanger 18 having vertical faces paralleling three edges of pan
16, the refrigerant reciprocating compressor 20 having a crankshaft
22 oriented for rotation about a vertical axis, the removable
access side panel 24 for servicing compressor 20 and controls, the
condenser discharge fan orifice plate 26 disposed above condenser
heat exchanger 18, the condenser blower or fan 28 disposed at the
orifice of plate 26, the condenser fan motor 30 drivingly connected
to fan 30, the discharge grille 32, and top panel 34. Conventional
fasteners, not shown, may be employed to connect these elements in
the position shown in the drawings. Pan 16 is preferably provided
with stiffening ribs 36 or corrugations at spaced intervals to
permit condenser section 18 to be used an an independent condensing
unit of an air conditioning split system.
Evaporator section 14 has a housing 38 including a top wall 40, a
bottom wall 42, a front sidewall 44, a back sidewall 46, and first
and second end sidewalls 48 and 50 respectively. A subframe 52 in
the form of a pair of beams 52a and 52b constructed of sheet metal
and having a channel shaped cross section is connected to the
underside of bottom wall 42 and extends horizontally outwardly
beyond housing 38 in underlying relationship to support pan 16 of
condenser section 12. Appropriate screws and bolts, not shown,
connect support pan 16 to evaporator section subframe 52.
The front sidewall 44 of evaporator section housing 38 has an inlet
aperture 54 for receiving air to be cooled and an outlet aperture
56 for discharging air that has been cooled; apertures 54 and 56
being disposed in horizontally spaced side-by-side relationship.
Back sidewall 46 has a first portion 46a (see FIGS. 2 and 3) which
extends along the back edge of bottom wall 42 in an area opposite
discharge aperture 56, and a second portion 46b disposed generally
opposite inlet aperture 54 and which extends along a path closer to
front sidewall 44 than first portion 46a and spaced from the back
edge of bottom wall 42. The first and second portions, 46a and 46b,
of back wall 46 are connected via an oblique portion, 46c. Portions
46b and 46c and those portions of top and bottom walls, 40 and 42,
disposed rearwardly of portions 46b and 46c define a channel having
an inlet opening at 58 for conducting cooling air to face 60 of
condenser heat exchanger 18. It will be noted that the space
between portion 46a of back wall 46 and front wall 44 is somewhat
deeper than the space between portion 46b and front wall 44. A fin
and tube evaporator heat exchanger 62 having a generally flat
rectangular face extends between front wall 44 and sidewall 48
across inlet aperture 54 in the shallower space between front wall
44 and portion 46b of back wall 46 of housing 38 whereby air
entering aperture 54 is directed through heat exchanger 62 and
thereby cooled. A centrifugal blower 64 for moving the air from
heat exchanger 62 out through discharge aperture 56 is disposed
within the deeper space between portion 46a of back wall 46 and
front wall 44. Evaporator blower 64 has an impeller 66 oriented to
be rotatably driven about a vertical axis by motor 68 within blower
housing 70. By disposing blower 64 in the deeper space, the blower
may have a larger diameter and shorter vertical extent thereby
providing ample space for air to pass from heat exchanger 62 to the
air inlets 72 at the top and bottom sides of blower housing 70.
Blower 64 is supported on rails 74 and 76 so that it may be
horizontally slid from evaporator housing 38 after removal of
sidewall 50 as shown in FIG. 2 for purposes of service.
Evaporator heat exchanger 62, compressor 20, condenser heat
exchanger 18 and a refrigerant throttling means (not shown) are
respectively serially connected in a conventional refrigerant
circuit whereby heat is absorbed from the air passing through
evaporator heat exchanger 62 and transferred to air passing through
condenser heat exchanger 18.
The self-contained air conditioning unit may be made in a variety
of capacities using the same top and bottom portions simply by
varying the vertical extent of condenser heat exchanger 18,
evaporator heat exchanger 62, compressor 20, evaporator blower 64
and condenser fan and motor 28 and 30.
From the foregoing description it will be seen that the
self-contained air conditioning unit may be constructed by
providing the condensing unit of a split system with an evaporator
section attachment which has a subframe for supporting the
condensing unit support pan. Further, the evaporator section
attachment is provided with an air conducting channel for
conducting condenser cooling air to that portion of the condenser
unit covered by the evaporator section attachment.
Having now described in detail the preferred embodiment of my
invention, I contemplate that many changes may be made without
departing from the scope or spirit of my invention and I
accordingly desire to be limited only by the claims.
* * * * *