U.S. patent application number 11/634950 was filed with the patent office on 2007-06-14 for condensing unit and cooling apparatus equipped with condensing unit.
Invention is credited to Hiroaki Kase, Kazunori Shimizu.
Application Number | 20070130987 11/634950 |
Document ID | / |
Family ID | 38137933 |
Filed Date | 2007-06-14 |
United States Patent
Application |
20070130987 |
Kind Code |
A1 |
Shimizu; Kazunori ; et
al. |
June 14, 2007 |
Condensing unit and cooling apparatus equipped with condensing
unit
Abstract
A condensing unit including a heat exchanger with end plates and
a compressor. The heat exchanger is disposed below the compressor
so that the end plate takes the load of the compressor. This
eliminates the use of a compressor-anchoring base plate, and thus
the number of structural parts is reduced. Accordingly, the
condensing unit can be further downsized, and cost reduction can be
achieved.
Inventors: |
Shimizu; Kazunori; (Shiga,
JP) ; Kase; Hiroaki; (Shiga, JP) |
Correspondence
Address: |
WENDEROTH, LIND & PONACK L.L.P.
2033 K. STREET, NW
SUITE 800
WASHINGTON
DC
20006
US
|
Family ID: |
38137933 |
Appl. No.: |
11/634950 |
Filed: |
December 7, 2006 |
Current U.S.
Class: |
62/508 ;
62/507 |
Current CPC
Class: |
F25D 23/006 20130101;
F25B 31/006 20130101 |
Class at
Publication: |
062/508 ;
062/507 |
International
Class: |
F25B 39/04 20060101
F25B039/04 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 12, 2005 |
JP |
2005-357415 |
Sep 13, 2006 |
JP |
2006-247740 |
Claims
1. A condenser unit, comprising: a heat exchanger including: a
plurality of fins; a pipe contacting the fins for heat conduction;
and an end plate disposed at both ends of the fins; and a
compressor; wherein the heat exchanger is disposed below the
compressor, and the end plate takes a load of the compressor.
2. The condenser unit of claim 1, wherein the end plate has a bent
portion for taking the load of the compressor, the bent portion
being provided at an upper part of the end plate.
3. The condenser unit of claim 1, wherein the end plate has an
anchoring bent portion provided at a lower part of the end
plate.
4. The condenser unit of claim 2, wherein the end plate has an
anchoring bent portion provided at a lower part of the end
plate.
5. The condenser unit of claim 1, further comprising a reinforcing
plate for coupling between the end plates.
6. The condenser unit of claim 5, wherein a duct for passing air
through the heat exchanger for heat diffusion is formed by a space
surrounded by the end plates and the reinforcing plate.
7. The condenser unit of claim 5, wherein the compressor is placed
on the end plate via the reinforcing plate.
8. The condenser unit of claim 6, wherein the compressor is placed
on the end plate via the reinforcing plate.
9. The condenser unit of claim 7, wherein the compressor is
anchored on the end plate with the reinforcing plate in
between.
10. The condenser unit of claim 8, wherein the compressor is
anchored on the end plate with the reinforcing plate in
between.
11. The condenser unit of claim 1, wherein the fins are disposed in
a vertically tilted manner relative to the end plate.
12. The condenser unit of claim 1, wherein a hole for inserting the
pipe is formed in the end plate, the hole being a slotted hole.
13. The condenser unit of claim 1, wherein a hole for inserting the
pipe is formed in the end plate, a portion around the hole being
burred.
14. The condenser unit of claim 1, further comprising a vibration
reducer between a bent portion of the end plate and an area where
the pipe is inserted, the bent portion being an area which takes
the load of the compressor.
15. The condenser unit of claim 14, wherein the vibration reducer
is a hole formed in the end plate.
16. The condenser unit of claim 14, wherein the vibration reducer
is a projection.
17. The condenser unit of claim 1, further comprising a fan for
convecting air through at least the heat exchanger.
18. The condenser unit of claim 17, wherein the fan is disposed at
a position for convecting air also to the compressor.
19. The condenser unit of claim 17, further comprising a
reinforcing plate for coupling between the end plates, wherein the
fan is attached to the reinforcing plate.
20. The condenser unit of claim 17, wherein the fan is provided in
plural number.
21. The condenser unit of claim 17, wherein the fan is attached to
the heat exchanger in one of a vertical manner and a tilted
manner.
22. A cooling apparatus equipped with a condenser unit, the
condenser unit comprising: a heat exchanger including: a plurality
of fins; a pipe contacting the fins for heat conduction, and an end
plate disposed at both ends of the fins; and a compressor; wherein
the heat exchanger is disposed below the compressor, and the end
plate takes a load of the compressor.
23. The cooling apparatus of claim 22, further comprising a
separate fan for cooling the condenser unit.
24. The cooling apparatus of claim 22, wherein the cooling
apparatus has an air passage for cooling the compressor by taking
air passing through the heat exchanger and exhausting the air from
a back of the cooling apparatus.
25. The cooling apparatus of claim 23, wherein the cooling
apparatus has an air passage for cooling the compressor by taking
air passing through the heat exchanger and exhausting the air from
a back of the cooling apparatus.
26. The cooling apparatus of claim 22, wherein the cooling
apparatus has an air passage for cooling the compressor by taking
air passing through the heat exchanger and exhausting the air from
an upper part of a back of the cooling apparatus.
27. The cooling apparatus of claim 23, wherein the cooling
apparatus has an air passage for cooling the compressor by taking
air passing through the heat exchanger and exhausting the air from
an upper part of a back of the cooling apparatus.
28. The cooling apparatus of claim 24, wherein the condenser unit
is disposed in a way such that the fan comes to a front of the
cooling apparatus.
29. The cooling apparatus of claim 25, wherein the condenser unit
is disposed in a way such that the fan comes to a front of the
cooling apparatus.
30. The cooling apparatus of claim 24, wherein the condenser unit
is disposed in a way such that the fan comes to the back of the
cooling apparatus.
31. The cooling apparatus of claim 25, wherein the condenser unit
is disposed in a way such that the fan comes to the back of the
cooling apparatus.
32. The cooling apparatus of claim 22, wherein an electrical
section of the compressor is disposed on a back of the cooling
apparatus.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to condensing units in which
the functions of a compressor and heat exchanger in a refrigerating
system are unitized, and more particularly to condensing units
employed in cooling apparatuses such as beverage dispensers and
display cases.
[0003] 2. Background Art
[0004] A conventional condensing unit is disclosed in Japanese
Patent No. 3667538, shown in FIG. 14.
[0005] Cooling apparatuses such as icemakers, beverage dispensers,
and display cases, in particular, require a machine section to take
up minimal volume in order to increase ice storage volume by
enlarging the ice-making area, or to increase stored beverage
volume by enlarging the beverage storage area so that the frequency
of beverage refills can be reduced. Accordingly, reduction of the
vertical dimension of the condensing unit has also been
required.
[0006] In FIG. 14, heat exchanger 1, fan 2, and compressor 3 are
disposed in this sequence from the bottom. These parts are disposed
in series vertically with compressor 3 at the top for reducing the
size. Fan 2 is attached to heat exchanger 1, and bracket 4 is also
attached to heat exchanger 1 so as to provide a duct for air taken
in by fan 2.
[0007] Compressor 3 is attached to compressor-anchoring base plate
5, and this compressor-anchoring base plate 5 is attached to a
bottom plate of the machine section in the cooling apparatus.
[0008] Although the size of the conventional condensing unit has
been successfully reduced by vertically disposing heat exchanger 1,
fan 2, and compressor 3 in series, the following disadvantages (1)
to (5) remain.
[0009] (1) Since exchanger 1, fan 2, and compressor 3 are disposed
vertically in series, a substantial space is required heightwise.
This results in, for example, an inability to secure a sufficient
space for cooling objects in a cooling apparatus where the
condensing unit is installed.
[0010] (2) The number of structural parts is large, including
bracket 4 for attaching fan 2 and compressor-anchoring base plate 5
for attaching compressor 3, leading to higher costs.
[0011] (3) Large fan 2 can be disposed facing heat exchanger 1 in a
broad area with a sufficient width and depth, achieving high heat
exchange efficiency. However, if small fan 2 is used, the
heat-exchanging area becomes smaller because fan 2 is close to heat
exchanger 1. Accordingly, sufficient heat exchange using the entire
heat exchanger 1 cannot be expected, impeding improvement in heat
exchange efficiency.
[0012] (4) Since fan 2 is disposed so as to cool compressor 3 from
the bottom, the upper part of compressor 3 where the temperature is
likely to increase due to heat generation from the internal
mechanism cannot be sufficiently cooled. This makes it difficult to
improve the coefficient of performance and reliability of
compressor 3.
[0013] (5) Since fan 2 is installed between heat exchanger 1 and
compressor 3, which have high temperature, fan 2 is also disposed
in a high-temperature environment. This makes it difficult to
secure the reliability and efficiency typically of a driving motor.
In addition, fan 2 is installed in a small space, making
maintenance work on fan 2 difficult.
SUMMARY OF THE INVENTION
[0014] The present invention solves the above disadvantages and
offers a downsized and more inexpensive condensing unit by reducing
the number of structural parts. In addition, the present invention
offers a condensing unit and products equipped with this condensing
unit, such as cooling apparatuses, that achieve high efficiency and
high reliability for components of the unit by further applying
other elements of the present invention.
[0015] To solve the disadvantages of the prior art, the condensing
unit of the present invention includes a heat exchanger and
compressor. The heat exchanger includes multiple fins, a pipe
contacting the fins for heat conduction, and end plates disposed at
both ends of the fins. The heat exchanger is disposed below the
compressor so as to take the load of the compressor on its end
plates.
[0016] This allows unitization of the compressor and heat exchanger
without using a compressor-anchoring base plate, achieving a
smaller condensing unit. Still more, non-use of the
compressor-anchoring base plate reduces the number of structural
parts, resulting in cost reduction. Furthermore, the present
invention provides a basis for achieving higher efficiency and
reliability for components such as the heat exchanger and
compressor by further applying other elements of the present
invention.
[0017] The present invention achieves a further downsized
condensing unit at lower cost. In addition, the present invention
provides a basis for achieving higher efficiency and reliability
for components such as the heat exchanger and compressor by further
applying other elements of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a side view of a condensing unit in accordance
with the first embodiment of the present invention.
[0019] FIG. 2 is a plan view of the condensing unit in accordance
with the first embodiment of the present invention.
[0020] FIG. 3 is a side perspective view of the condensing unit in
accordance with the first embodiment of the present invention.
[0021] FIG. 4 is a perspective view of a reinforcing plate of the
condensing unit in accordance with the first embodiment of the
present invention.
[0022] FIG. 5 is a side perspective view of a cooling apparatus
equipped with the condensing unit in accordance with the first
embodiment of the present invention.
[0023] FIG. 6 is a side perspective view of a condensing unit in
accordance with the second embodiment of the present invention.
[0024] FIG. 7 is a plan view of a condensing unit in accordance
with the third embodiment of the present invention.
[0025] FIG. 8 is a side view of a condensing unit in accordance
with the fourth embodiment of the present invention.
[0026] FIG. 9 is a side perspective view of a cooling apparatus
equipped with the condensing unit in accordance with the fifth
embodiment of the present invention.
[0027] FIG. 10 is a magnified perspective view of a key part of a
heat exchanger in accordance with the sixth embodiment of the
present invention.
[0028] FIG. 11 is a magnified sectional view of a key part where an
end plate and pipe of a heat exchanger contact in accordance with
the seventh embodiment of the present invention.
[0029] FIG. 12 is a side view of a condensing unit in accordance
with the eighth embodiment of the present invention.
[0030] FIG. 13 is a side view of a condensing unit in accordance
with the ninth embodiment of the present invention.
[0031] FIG. 14 is a side perspective view of a conventional
condensing unit.
DETAILED DESCRIPTION OF THE INVENTION
[0032] A condensing unit in an embodiment of the present invention
includes a heat exchanger and a compressor. The heat exchanger
includes multiple fins, a pipe contacting the fins for heat
conduction, and end plates provided at both ends of the fins. The
heat exchanger is disposed below the compressor so that the end
plates take the load of compressor. This allows unitization of the
compressor and the heat exchanger without the use of a
compressor-anchoring base plate, achieving a smaller condensing
unit. In addition, elimination of the use of the
compressor-anchoring base plate reduces the number of structural
parts, reducing costs.
[0033] Another embodiment of the condensing unit of the present
invention has an upper flange on an upper part of each of the end
plates as a bent portion for taking the load of the compressor.
This facilitates the provision of a flat area for directly or
indirectly placing the compressor, and thus the load of compressor
can be reliably supported by means of a simple structure.
[0034] Still another embodiment of the condensing unit of the
present invention has a lower flange on a lower part of each of the
end plates as an anchoring bent portion. This facilitates formation
of a flat area for attaching the condensing unit to a product body,
such as a cooling apparatus, and thus assembly operability can be
improved by the use of this anchoring bent portion.
[0035] Still another embodiment of the condensing unit of the
present invention has a reinforcing plate for coupling the end
plates to each other. The reinforcing plate strengthens the
connection between the endplates, and thus the structural strength
of the heat exchanger on which the compressor is placed increases.
This also leads to reduced propagation of vibration.
[0036] Still another embodiment of the condensing unit of the
present invention forms a duct for passing air through the heat
exchanger for heat diffusion by the space surrounded by the end
plates and the reinforcing plate. This efficiently permits airflow
to the heat exchanger, and thus the heat exchange efficiency
improves, achieving higher performance for the condensing unit. In
addition, since no separate component is needed for establishing a
duct, the duct can be provided economically. Still more, since no
additional space is required for establishing the duct, an even
smaller condensing unit is achievable
[0037] Still another embodiment of the condensing unit of the
present invention places the compressor on the end plates via the
reinforcing plate. This allows installation of the compressor on
the reinforcing plate as required, even if the pitch of the end
plates is broader than the attachment pitch of the compressor, or
if the bent length of the upper part of the end plate is too short
to directly place the compressor on the end plates. Accordingly,
installation of the compressor can be more flexibly designed.
[0038] Still another embodiment of the condensing unit of the
present invention anchors the compressor on the end plates with the
reinforcing plate in between. This allows co-tightening of the
reinforcing plate onto the end plates using an anchoring component
for the compressor without using a fixing screw for securing the
reinforcing plate onto the end plate. Elimination of the use of the
fixing screw for the reinforcing plate reduces costs.
[0039] Still another embodiment of the condensing unit of the
present invention has the fins of the heat exchanger tilted
vertically relative to the end plates. This improves the
distribution of heat exchange inside the heat exchanger, and
achieves roughly uniform airflow across the all fins. Accordingly,
the heat exchange efficiency of the heat exchanger improves,
achieving a condensing unit with higher performance.
[0040] Still another exemplary embodiment of the condensing unit of
the present invention has a slotted hole in the end plate for
inserting the pipe. This reduces a contact section between the end
plate and the pipe, where the stress concentrates, and thus a
stress-concentrating area becomes smaller. Accordingly, leaks due
to propagation of vibration of the compressor can be reduced.
[0041] Still another exemplary embodiment of the condensing unit of
the present invention has a burred portion on a hole in the end
plate where the pipe is inserted. This prevents concentration of
stress, since a planar contact is established between the end plate
and pipe. Accordingly, leaks due to propagation of vibration of the
compressor can be reduced.
[0042] Still another embodiment of the condensing unit of the
present invention provides a vibration reducer between the bent
portion of the end plate, which takes the compressor load, and a
pipe insert area. This prevents concentration of the stress on a
contact section between the end plate and the pipe, since the
vibration reducer reduces vibration of the compressor. Accordingly,
leaks due to propagation of vibration of the compressor can be
reduced.
[0043] Still another exemplary embodiment of the condensing unit of
the present invention has a hole as the vibration reducer. This
prevents concentration of stress on the contact section between the
end plate and the pipe, since the hole reduces the vibration of the
compressor. Accordingly, leaks due to propagation of vibration of
the compressor can be reduced. In addition, this hole can be formed
in the same step as making a hole for passing the pipe through
during the presswork of the end plate. Accordingly, a hole for
reducing vibration can be easily formed without extra cost.
[0044] Still another embodiment of the condensing unit of the
present invention has a projection as the vibration reducer. This
prevents concentration of stress on the contact section between the
end plate and the pipe, since the projection reduces the vibration
of the compressor. Accordingly, leaks due to propagation of
vibration of the compressor can be reduced. In addition, this
projection can be easily formed during the presswork of the end
plate. Furthermore no shear droop or burr is generated, and thus
there is no danger of injury by the processed section, securing the
safety.
[0045] Still another embodiment of the condensing unit of the
present invention attaches a fan for convecting air through at
least the heat exchanger. This allows forced convection of air
through the heat exchanger, and thus the heat exchange efficiency
significantly improves. Accordingly, the condensing unit with
further higher performance is achievable.
[0046] Still another embodiment of the condensing unit of the
present invention attaches a fan in a way such that air convected
by the fan is also convected to the compressor. The
forced-convection air to the compressor in addition to the heat
exchanger enhances cooling of the compressor, and thus coefficient
of performance increases. In addition, the temperature environment
of internal mechanisms such as a compression mechanism and motor
improve, achieving further higher performance, energy-saving, and
also better reliability for the condensing unit.
[0047] Still another embodiment of the condensing unit of the
present invention attaches a fan to the reinforcing plate. This
enables a compact integration of the fan to the condensing unit. In
addition, forced-convection air by the fan can be applied to the
heat exchanger and the compressor at a shorter distance, and thus
the cooling efficiency improves. Accordingly, a condensing unit
with higher performance is achievable.
[0048] Still another embodiment of the condensing unit of the
present invention attaches multiple fans. The use of small fans
with performance equivalent to one large fan allows an efficient
use of space, achieving further downsizing.
[0049] Still another embodiment of the condensing unit of the
present invention has the fan attached vertically or obliquely.
Compared to the case of attaching the fan horizontally, a projected
area of the fan is smaller. In other words, an installation space
for the fan in a longer direction becomes smaller, achieving
further downsizing. In addition, the direction of forced convection
air passing through the heat exchanger can be changed with
relatively small resistance so as to apply it to the compressor.
Accordingly, the cooling efficiency can be increased when the
condensing unit is built into a product such as a cooling
apparatus.
[0050] A cooling apparatus of the present invention is equipped
with the condensing unit of the present invention. This reduces the
space for machine section where the condensing unit is installed.
Accordingly, a storage space for cooling objects, for example, can
be broadened in the cooling apparatus. Improved volume efficiency
relative to the installation space increases the product's
value.
[0051] An embodiment of the cooling apparatus of the present
invention has the condensing unit of the present invention and a
separate fan for cooling the condensing unit. This reduces the
space for machine section where the condensing unit is installed.
Accordingly, a storage space for cooling objects, for example, can
be broadened in the cooling apparatus. Improved volume efficiency
relative to the installation space increases the product's value.
In addition, an air passage for cooling the condensing unit can be
designed more flexibly by separately providing the forced cooling
fan in the main body of the cooling apparatus. This allows
optimization as a product.
[0052] Still another embodiment of the cooling apparatus of the
present invention has an air passage for cooling the compressor
using intake air passing through the heat exchanger, and exhausting
this air from the back of the cooling apparatus. This allows the
reuse of air exhausted from the heat exchanger by applying the
exhausted air to the compressor to cool down the compressor at high
temperature, improving the reliability of the compressor. In
addition, since the heat is released from the back of the cooling
apparatus, the user is not bothered by heat expelled toward the
user when standing in front of the cooling apparatus.
[0053] Still another embodiment of the cooling apparatus of the
present invention has an air passage for cooling the compressor
using intake air passing through the heat exchanger, and exhausting
this air from an upper part of the back of cooling apparatus. This
allows the reuse of air exhausted from the heat exchanger by
applying the exhausted air to the compressor to cool down the
compressor at high temperature; improving the reliability of the
compressor. In addition, since the exhausted air is released from
the upper part at the back of the cooling apparatus, the cooling
apparatus can be installed with its back close to a wall.
Accordingly, there is greater flexibility in installation position
of the cooling apparatus, and the installation space can be
reduced.
[0054] Still another embodiment of the cooling apparatus of the
present invention has the condensing unit disposed in a way such
that the fan comes to the front of the cooling apparatus. This
facilitates formation of an air passage for reusing and applying
air passing through the heat exchanger to the compressor.
Accordingly, the cooling efficiency of the product by forced
convection can be increased, and the air passage that facilitates
exhausting of heat from the back can be configured.
[0055] Still another embodiment of the cooling apparatus of the
present invention has the condensing unit disposed in a way such
that the fan comes to the back of the cooling apparatus. This
facilitates replacement or repair of the fan from the back,
improving the serviceability.
[0056] Still another embodiment of the cooling apparatus of the
present invention has an electrical section of the compressor at
the back of the cooling apparatus. This facilitates replacement or
repair of the electrical section of the compressor from the back,
improving the serviceability.
[0057] The embodiments of the present invention are described below
with reference to drawings. Same reference numerals are given to
the structure same as the prior art or preceding embodiments to
omit duplication in detailed description. The present invention is
not limited to these embodiments.
FIRST EMBODIMENT
[0058] FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is
a side perspective view of condensing unit 510 in the first
embodiment of the present invention. FIG. 4 is a perspective view
of reinforcing plate 300. FIG. 5 is a side perspective view of a
beverage dispenser as a cooling apparatus equipped with condensing
unit 510 in the first embodiment of the present invention.
[0059] In FIGS. 1 to 5, heat exchanger 100 includes multiple fins
120, pipe 130 inserted roughly perpendicular to fins 120, and end
plates 110 at both ends of fins 120. Fins 120, pipe 130, and end
plates 110 are made of aluminum, copper and galvanized iron sheet,
respectively.
[0060] Each of end plates 110 includes base 110C extending
vertically and two flanges horizontally protruding in opposite
directions from base 110C. In these two flanges, upper flange 110A
is a bent portion for placing the compressor above, and lower
flange 110B is a bent portion for anchoring the installed
condensing unit. Base 110C, upper flange 110A, and lower flange
110B are processed by bending sheet metal. Upper flange 110A is
bent inward to fins 120, and lower flange 110B is bent in the
direction opposite to the inward direction to fins 120.
[0061] Fins 120 of heat exchanger 100 are disposed so as to be
tilted vertically with fin end 121 near to fan 200 lower than fin
end 122 far from fan 200.
[0062] Reinforcing plate 300 includes top face 300A, two side faces
300B parallel to fins 120, and two side faces 300C perpendicular to
fins 120. They are processed by bending sheet metal. Side faces
300B protrude downward from a part of edges of top face 300A in an
area where fan 200 is placed. One of side faces 300C protrudes
downward from an edge of top face 300A in an area where fan 200 is
placed, and the other side face 300C protrudes downward from an
edge of top face 300A at the opposite side of fan 200.
[0063] Top face 300A of reinforcing plate 300 covers the top face
of heat exchanger 100, and is attached to upper flange 110A of end
plate 110 by reinforcing-plate fixing screw 700.
[0064] Fan 200 is attached on top face 300A of reinforcing plate
300. An air passage for forced convection is established by
disposing heat exchanger 100 inside the duct formed by the space
surrounded with end plates 110 and reinforcing plate 300. Air
enters from the underside of heat exchanger 100 or from the side of
heat exchanger 100 opposite fan 200, and exits from fan 200 through
reinforcing plate 300.
[0065] Compressor 400 is placed on top face 300A of reinforcing
plate 300, and fixed by compressor-anchoring bolt 800.
[0066] Beverage dispenser 900 includes electrical section 901,
dispensing section 902, beverage storage 903, cooling section 904,
and machine section 905; and condensing unit 510 is installed in
machine section 905. Lower flange 110B is attached to bottom plate
906 of beverage dispenser 900, i.e., a cooling apparatus.
[0067] Air taken in by fan 200 from the underside of heat exchanger
100 is blown toward compressor 400, and exits from an upper part of
the back of beverage dispenser 900.
[0068] The operation of condensing unit 510 and beverage dispenser
900, i.e., a cooling apparatus, as configured above is described
below.
[0069] Compressor 400 is placed such that its load is supported by
end plate 110 via reinforcing plate 300. Accordingly, the use of a
separate compressor-anchoring base, as in the prior art, is
eliminated, achieving a smaller condensing unit. This in turn
reduces the number of structural parts, reducing costs.
[0070] Upper flange 110A, which is a bent portion for taking the
load of compressor 400, is provided at an upper part of end plate
110. This structure facilitates the provision of a flat area for
indirectly placing compressor 400, and thus the load of compressor
400 can be reliably supported by means of a simple structure.
[0071] Compressor 400 is placed on upper flange 110A of end plate
110 via reinforcing plate 300. This allows installation of
compressor 400 on reinforcing plate 300 as required, even if the
pitch of end plates 110 is broader than the attachment pitch of
compressor 400 or if the bent length of upper flange 110A is too
short to directly support compressor 400 on end plate 110.
Accordingly, installation of compressor 400 can be more flexibly
designed.
[0072] A lower part of end plate 110 is bent to simply configure
lower flange 110B as a bent portion for anchoring condensing unit
510. This structure enables the use of lower flange 110B for
anchoring condensing unit 510 onto beverage dispenser 900,
improving assembly operability.
[0073] Reinforcing plate 300 for coupling end plates 110 is
provided such that reinforcing plate 300 strengthens the connection
between the end plates. This increases the structural strength of
heat exchanger 100 on which compressor 400 is placed, and thus
propagation of vibration, for example, can be reduced.
[0074] Reinforcing plate 300 also covers the top face of heat
exchanger 100 to form an air passage 360. In other words, duct 350
for passing air through heat exchanger 100 for heat diffusion is
formed by the space surrounded by end plate 110 and reinforcing
plate 300. This efficiently permits airflow to heat exchanger 100,
improving the heat exchange efficiency. Condenser unit 510 can thus
achieve higher performance. In addition, since no separate
component is needed for establishing a duct 350, the duct 350 can
be provided economically. In addition, since no additional space is
required for establishing the duct, an even smaller condensing unit
is achievable.
[0075] Fins 120 are tilted vertically to improve the distribution
of heat exchange inside heat exchanger 100, and achieve roughly
uniform airflow across all fins 120. This improves the heat
exchange efficiency of heat exchanger 100, and condensing unit 510
can thus achieve higher performance.
[0076] Fan 200 is attached so as to at least convect air through
heat exchanger 100. This enables forced convection of air in heat
exchanger 100, thus significantly improving the heat exchange
efficiency. Condenser unit 510 can thus achieve higher performance.
In addition, the attachment of fan 200 to reinforcing plate 300
establishes an air passage 360 for efficiently exhausting air taken
in by fan 200 in a more compact manner. This improves the heat
exchange efficiency, and thus condensing unit 510 can achieve
higher performance.
[0077] Condenser unit 510 installed in beverage dispenser 900
enables downsizing of the space required for machine section 905
where condensing unit 510 is installed. This, for example, enables
broadening of a storage space for cooling objects in the cooling
apparatus. Accordingly, improved volume efficiency relative to the
installation space increases the product's value. In addition, in
case of beverage dispenser 900, the beverage storage volume can be
increased. This contributes to a lower frequency of beverage
refills.
[0078] Fan 200 is attached such that convecting air also convects
to compressor 400.
[0079] Accordingly, forced air convection is applied to compressor
400 in addition to heat exchanger 100. This enhances the cooling of
compressor 400 and increases its coefficient of performance. In
addition, the temperature environment for internal mechanisms such
as the compression mechanism and motor is improved. Condenser unit
510 can thus achieve higher performance, energy-saving, and also
better reliability.
[0080] Still more, the first embodiment has an air passage 360 for
cooling compressor 400 using air taken in from the underside of
heat exchanger 100 and exhausting this air from the back of
beverage dispenser 900. This structure allows the reuse of air
exhausted from heat exchanger 100 by applying the exhausted air to
compressor 400 to cool down high-temperature compressor 400,
improving reliability 15 of compressor 400. In addition, since air
is exhausted from the back of beverage dispenser 900, the user is
not bothered by air exhausted toward the user when standing in
front of beverage dispenser 900.
[0081] Still more, the first embodiment may have an air passage 360
for cooling compressor 400 using air taken in from the underside of
heat exchanger 100 and exhausting this air from an upper part of
the back of beverage dispenser 900. This allows the reuse of air
exhausted from heat exchanger 100 by applying the exhausted air to
compressor 400 to cool down high-temperature compressor 400,
improving reliability of compressor 400. In addition, since air is
exhausted from the upper part of the back of beverage dispenser
900, beverage dispenser 900 can be installed with its back close to
a wall. Accordingly, there is greater flexibility in installation
position of beverage dispenser 900, and the installation space can
be downsized.
[0082] Still more, fan 200 is provided separately on an appropriate
part of a body of beverage dispenser 900 without integrating fan
200 with condensing unit 510. This gives more flexibility in
designing a structure of air passage 360 for cooling condensing
unit 510. Accordingly, beverage dispenser 900 can be optimized as a
product.
[0083] Still more, electrical section 410 of compressor 400 is
provided on the back of beverage dispenser 900. This facilitates
the servicing and repair of electrical section 410 of compressor
400 simply by detaching rear panel 907. Accordingly, serviceability
can be improved.
[0084] In this embodiment, filter drier 600 for adsorbing moisture
or removing dust, which are harmful in refrigerating systems, is
provided in the structure of condensing unit. However, this may not
be provided.
[0085] In this embodiment, upper flange 110A and lower flange 110B
of each of end plates 110 protrude horizontally in opposite
directions from vertical base 110C. However, both upper flange 110A
and lower flange 110B may be formed opposite to the inward
direction to fins 120. In other words, both upper flange 110A and
lower flange 110B may protrude outward perpendicular to base 110C,
roughly forming a U shape. In this case, since upper flange 110A is
formed in the direction opposite to the inward direction to fins
120, components such as fan 200 are unlikely to hit pipe 130 during
assembly of the condensing unit, reducing the risk of deforming
pipe 130. Degradation of the product quality of heat exchanger 100
is thus preventable.
[0086] Or, end plates 110 may be configured by the combination of
both upper flange 110A and lower flange 110B formed in a direction
opposite to the inward direction to fins 120, and upper flange 110A
and lower flange 110B formed in directions opposite to each
other.
[0087] Still more, upper flange 110A and lower flange 110B are made
by bending sheet metal in this embodiment. However, they can be
separate pieces.
[0088] In this embodiment, reinforcing plate 300 includes top face
300A, two side faces 300B horizontal to fins 120, and two side
faces 300C perpendicular to fins 120. However, side faces 300C may
be eliminated by forming a flange on base 110C of end plate 110
toward fins 120 on a face different from upper flange 110A and
lower flange 110B, so as to form an air passage while preventing
formation of a bypass duct that takes in air exhausted from fan
200.
[0089] Still more, an air passage 360 may be formed by extending
base 110C of end plate 110 to the position of fan 200 without
providing side faces 300B on reinforcing plate 300.
[0090] In this embodiment, compressor 400 is a reciprocating
compressor 400. However, the use of a rotary compressor 400 enables
further downsizing.
[0091] In this embodiment, fan 200 is installed so as to improve
cooling performance by forced convection. If there is an allowance
in performance, natural convection without installing fan 200 may
be adopted. This eliminates the noise of fan 200, achieving a
quieter condensing unit.
[0092] Still more, this embodiment has an air passage 360 to expel
air from the upper part on the back of beverage dispenser 900.
However, the air passage 360 to exhaust air from the back of
beverage dispenser 900 may be configured.
[0093] In this embodiment, the condensing unit is installed in
beverage dispenser 900. However, the condensing unit may be
installed in other cooling apparatuses such as icemakers, display
cases, and refrigerators.
SECOND EMBODIMENT
[0094] FIG. 6 is a side perspective view of condensing unit 520 in
the second embodiment of the present invention.
[0095] In FIG. 6, heat exchanger 100 includes multiple fins 120,
pipe 130 inserted roughly perpendicular to fins 120, and end plates
110 at both ends of fins 120.
[0096] End plates 110 include base 110C, and upper flange 110 and
lower flange 110B protruding perpendicular to base 110C. Base 110C,
upper flange 110A, and lower flange 110B are processed by bending
sheet metal. Upper flange 110A is provided inward to fins 120, and
lower flange 110B is provided in the direction opposite to the
inward direction to fins 120. Here, upper flange 110A is a bent
portion for placing the compressor above, and lower flange 110B is
a bent portion for anchoring the installed condensing unit.
[0097] Reinforcing plate 300 includes top face 300A, two side faces
300B (as shown in FIG. 4) parallel to fins 120, and two side faces
300C (as shown in FIG. 4) perpendicular to fins 120. Top face 300A,
two side faces 300B, and two side faces 300C are processed by
bending sheet metal. Side faces 300B protrude downward from a part
of edges of top face 300A in an area where fan 200 is placed. One
of side faces 300C protrudes downward from an edge of top face 300A
in an area where fan 200 is placed, and the other side face 300C
protrudes downward from an edge of top face 300A at the opposite
side of fan 200.
[0098] Fan 200 (not illustrated) is attached on top face 300A of
reinforcing plate 300, and forms an air passage 360 together with
heat exchanger 100. Air enters from the underside of heat exchanger
100 or from the side of heat exchanger 100 opposite fan 200, and
exits from fan 200 through reinforcing plate 300.
[0099] Fins 120 of heat exchanger 100 are disposed so as to be
tilted vertically with fin end 121 (not illustrated) near to fan
200 lower than fin end 122 (not illustrated) far from fan 200.
[0100] Compressor 400 is placed on upper flange 110A of end plate
110 of heat exchanger 100, and fixed using compressor-anchoring
bolt 800 with reinforcing plate 300 in between.
[0101] The operation of the condensing unit as configured above is
described next.
[0102] Reinforcing plate 300 can be secured together using an
anchoring member for compressor 400 without using fixing screw 700
for fixing reinforcing plate 300 on end plate 110 by sandwiching
and fixing reinforcing plate 300 between compressor 400 and end
plate 110. This eliminates the need of reinforcing plate-fixing
screw 700, achieving cost reduction.
THIRD EMBODIMENT
[0103] FIG. 7 is a plan view of condensing unit 530 in the third
exemplary embodiment of the present invention.
[0104] In FIG. 7, two fans 200 are disposed in parallel on top face
300A of reinforcing plate 300.
[0105] The operation of condensing unit 530 as configured above is
described below.
[0106] To secure air volume of fan 200, a predetermined diameter is
required for fan 200. If only one fan 200 is provided, the
dimension in a longer direction (X direction in FIG. 7) becomes
longer, causing wasted space. If two fans 200 with smaller outline,
which have performance equivalent to one large fan 200, are
disposed in parallel, the space can be more efficiently used. This
leads to downsizing of the condensing unit 530. For example, if two
small fans of 60 mm square are used instead of one large fan of 120
mm square, the size of the condensing unit can be reduced by 60
mm.
[0107] In this exemplary embodiment, two fans 200 are disposed in
parallel. However, it is apparent that they may also be disposed in
series.
[0108] In addition, two fans 200 may be disposed slightly shifted
or fans 200 with different number of revolutions or size may be
used to prevent resonance of two fans 200.
[0109] In addition, the number of fans 200 may also be three or
more.
[0110] In this exemplary embodiment, box type fan 200 in which the
blades and motor are integrated and housed in a casing is used as
fan 200. However, sirocco types, cross-flow types or types with
separate blades and motors are also applicable.
FOURTH EMBODIMENT
[0111] FIG. 8 is a side view of condensing unit 540 in the fourth
exemplary embodiment of the present invention.
[0112] In FIG. 8, fan 200 is vertically attached to a side face of
reinforcing plate 300.
[0113] The operation of condensing unit 540 as configured above is
described below.
[0114] Since fan 200 is vertically disposed, a projected area of
fan 200 is smaller than when disposing fan 200 horizontally. More
specifically, the installation space for fan 200 in a longer
direction becomes smaller, achieving further downsizing.
[0115] In the fourth exemplary embodiment, fan 200 is vertically
disposed relative to heat exchanger 100. In addition, fan 200 may
be disposed in a tilted manner relative to heat exchanger 100. An
appropriate angle may be set in accordance with a layout for
installing condensing unit 540 in a cooling apparatus.
[0116] Since the direction of forced convection air passing through
heat exchanger 100 can be changed with relatively small resistance,
so as to apply it to compressor 400, the cooling efficiency can be
increased when the condensing unit is built into a product such as
a cooling apparatus.
FIFTH EMBODIMENT
[0117] FIG. 9 is a side perspective view of beverage dispenser 900
equipped with condensing unit 550 in the fifth embodiment of the
present invention.
[0118] In FIG. 9, fan 200 is disposed at the back of beverage
dispenser 900.
[0119] The operation of beverage dispenser 900 as configured above
is described below.
[0120] Since fan 200 is disposed at the back of beverage dispenser
900, fan 200 can be easily replaced or repaired from the back just
by removing rear panel 907, achieving higher serviceability.
SIXTH EMBODIMENT
[0121] FIG. 10 is a magnified perspective view of a key part of the
heat exchanger in the sixth embodiment of the present
invention.
[0122] In FIG. 10, a slotted hole 110D is formed in end plate 110
of heat exchanger 100, and pipe 130 is inserted into this slotted
hole 110D.
[0123] The operation of the condensing unit as configured above is
described below.
[0124] A contact area between pipe 130 and end plate 110 becomes
smaller by inserting pipe 130 into slotted hole 110D, compared to
that of inserting pipe 130 into a round hole. Since the contact
area between pipe 130 and end plate 110, where leaks often occurs
by stress concentration due to vibration of compressor 400, becomes
smaller, leaks due to propagation of vibration of compressor 400
can be reduced.
SEVENTH EMBODIMENT
[0125] FIG. 11 is a magnified sectional view of a contact section
between end plate 110 of the heat exchanger 100 and pipe 130 in the
seventh embodiment of the present invention.
[0126] In FIG. 11, burred portion 110E is made on end plate 110 of
heat exchanger 100, and pipe 130 is inserted into this burred
portion 110E.
[0127] The operation of the condensing unit as configured above is
described below.
[0128] Insertion of pipe 130 into burred portion 110E of end plate
110 establishes a planar contact between pipe 130 and end plate
110. This reduces leaks which often occur by the stress
concentrated on a contact area between pipe 130 and end plate 110
due to vibration of compressor 400. Accordingly, leaks due to
propagation of vibration of compressor 400 can be reduced. In
addition, though not illustrated, burred portion 110E is preferably
provided on all holes of end plate 110 where pipe 130 is inserted,
but partially without burred portion 110E is also acceptable.
EIGHTH EMBODIMENT
[0129] FIG. 12 is a side view of condensing unit 580 in the eighth
embodiment of the present invention.
[0130] In FIG. 12, vibration-reducing hole 110F is provided in end
plate 110 of heat exchanger 100 between the bent portion, which
takes the load of compressor 400, and pipe 130.
[0131] The operation of condensing unit 580 as configured above is
described below.
[0132] Since vibration-reducing hole 110F is provided between the
bent portion of end plate 110, which takes the load of compressor
400, and pipe 130, vibration of compressor 400 can be reduced.
Accordingly, leaks due to propagation of vibration of compressor
400 can be reduced. In addition, this hole can be formed
simultaneously in the same step as making a hole for passing the
pipe through during the presswork of end plate 110. Accordingly,
the vibration-reducing hole can be easily formed without extra
cost.
[0133] In this embodiment, two square vibration-reducing holes 110F
are formed. However, one hole or numerous holes can be provided. In
addition, any hole shapes including round and slotted holes are
applicable. The position of vibration-reducing hole 110F is
preferably right under the anchoring area of end plate 110 of
compressor 400 because vibration can be most easily reduced at this
area.
NINTH EMBODIMENT
[0134] FIG. 13 is a side view of condensing unit 590 in the ninth
embodiment of the present invention. Vibration-reducing projection
110G is provided on end plate 110 of heat exchanger 100 between the
bent portion, which takes the load of compressor 400, and pipe
130.
[0135] The operation of condensing unit 590 as configured above is
described below.
[0136] Since vibration-reducing projection 110G is provided between
the bent portions of end plate 110, which takes the load of
compressor 400, and pipe 130, vibration of compressor 400 can be
reduced. Accordingly, leaks due to propagation of vibration of
compressor 400 can be reduced. In addition, this projection can be
easily processed during the presswork of end plate 110. In
addition, no shear droop or burr is generated after processing.
Accordingly, injury by the processed part is avoidable, securing
the safety.
[0137] In this embodiment, one vibration-reducing projection 110G
is provided. However, multiple projections may be provided, and any
shapes including round dimple or louver are also applicable. The
position of projection 110G is preferably right under the anchoring
area of end plate 110 of compressor 400 because vibration can be
most easily reduced at this area.
[0138] The condensing unit of the present invention enables cost
reduction, downsizing, and higher performance. Accordingly, the
condensing unit of the present invention is applicable to diverse
purposes including icemakers, beverage dispensers, display cases,
and refrigerators.
* * * * *