U.S. patent application number 14/288809 was filed with the patent office on 2014-12-04 for outdoor heat exchanger and air conditioner.
This patent application is currently assigned to SAMSUNG ELECTRONICS CO., LTD.. The applicant listed for this patent is SAMSUNG ELECTRONICS CO., LTD.. Invention is credited to Jong Yeop Baek, Hong Gi Cho, Hyun Chul Cho, Yong Hwa Choi, Jin Woo HONG, Dong Hyun Kim, Dong Suk Kim, Ha Na Kim, Jung Ho Kim, Byung Han Lim, Jun Woo Suh.
Application Number | 20140352352 14/288809 |
Document ID | / |
Family ID | 51983586 |
Filed Date | 2014-12-04 |
United States Patent
Application |
20140352352 |
Kind Code |
A1 |
HONG; Jin Woo ; et
al. |
December 4, 2014 |
OUTDOOR HEAT EXCHANGER AND AIR CONDITIONER
Abstract
An outdoor heat exchanger has a total length of refrigerant flow
passage in which a refrigerant flows along a refrigerant tube, and
exchanges heat with outdoor air, the outdoor heat exchanger
including a plurality of refrigerant tubes spaced apart from one
another, a first and second header respectively coupled to both end
portions of each of the refrigerant tubes, and a plurality of heat
exchanging fins coupled to outer surfaces of the refrigerant tubes
to widen a surface making contact with an outside, wherein a total
length of a refrigerant flow passage in which a refrigerant flows
along the refrigerant tube and exchanges heat with outdoor air is
equal to or greater than about 1500 mm and equal to or less than
about 6000 mm, in which range, the outdoor heat exchange achieves
the optimum performance.
Inventors: |
HONG; Jin Woo; (Suwon-si,
KR) ; Kim; Dong Suk; (Suwon-si, KR) ; Kim;
Jung Ho; (Suwon-si, KR) ; Kim; Ha Na;
(Anseong-si, KR) ; Baek; Jong Yeop; (Busan,
KR) ; Lim; Byung Han; (Suwon-si, KR) ; Cho;
Hong Gi; (Suwon-si, KR) ; Kim; Dong Hyun;
(Suwon-si, KR) ; Suh; Jun Woo; (Suwon-si, KR)
; Cho; Hyun Chul; (Hwaseong-si, KR) ; Choi; Yong
Hwa; (Hwaseong-si, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SAMSUNG ELECTRONICS CO., LTD. |
Suwon-si |
|
KR |
|
|
Assignee: |
SAMSUNG ELECTRONICS CO.,
LTD.
Suwon-si
KR
|
Family ID: |
51983586 |
Appl. No.: |
14/288809 |
Filed: |
May 28, 2014 |
Current U.S.
Class: |
62/498 ; 165/173;
165/174 |
Current CPC
Class: |
F28D 2021/0068 20130101;
F28F 1/32 20130101; F28F 2260/02 20130101; F28F 9/0209 20130101;
F28D 1/05391 20130101; F24F 1/18 20130101 |
Class at
Publication: |
62/498 ; 165/173;
165/174 |
International
Class: |
F28F 9/02 20060101
F28F009/02; F24F 1/00 20060101 F24F001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 4, 2013 |
KR |
10-2013-0064217 |
Claims
1. An outdoor heat exchanger, comprising: a plurality of
refrigerant tubes; a first header and a second header coupled to
each end portions of each of the plurality of refrigerant tubes,
respectively; and a plurality of heat exchanging fins coupled to
outer surfaces of the plurality of refrigerant tubes, wherein a
total length of a refrigerant flow passage in which a refrigerant
flows along the refrigerant tubes is equal to or greater than about
1500 mm and equal to or less than about 6000 mm.
2. The outdoor heat exchanger of claim 1, wherein: when a heat
transfer performance of the outdoor heat exchanger is equal to or
less than about 4000 W, the total length of the refrigerant flow
passage is equal to or greater than about 1500 mm and equal to or
less than about 5000 mm.
3. The outdoor heat exchanger of claim 1, wherein: when a heat
transfer performance of the outdoor heat exchanger exceeds about
4000 W, the total length of the refrigerant flow passage is equal
to or greater than about 2500 mm and equal to or less than about
6000 mm.
4. The outdoor heat exchanger of claim 1, further comprising: a
baffle provided inside the first header or the second header to
block a longitudinal flow of the refrigerant to change a direction
of the refrigerant.
5. The outdoor heat exchanger of claim 4, wherein: the baffle on of
a plurality of baffles installed inside the first header and the
second header.
6. The outdoor heat exchanger of claim 5, wherein: the plurality of
baffles are installed in an alternate manner lengthwise along the
first header and the second header.
7. The outdoor heat exchanger of claim 6, wherein: the total length
of the refrigerant flow passage is equal to a length of the
refrigerant tube multiplied by the number obtained by adding 1 to
the number of the baffles.
8. The outdoor heat exchanger of claim 1, wherein: the refrigerant
tube is a micro-channel tube having equal to or less than about 3
mm of hydraulic diameter.
9. The outdoor heat exchanger of claim 1, wherein: the outdoor heat
exchanger is used by converting the outdoor heat exchanger into one
of a condenser and an evaporator.
10. The outdoor heat exchanger of claim 1, wherein: the refrigerant
comprises at least one of R22 and R410a.
11. The outdoor heat exchanger of claim 1, wherein: the refrigerant
comprises at least one of R32, R1234yf, and R1234ze.
12. An air conditioner, comprising: a compressor configured to
compress refrigerant gas and discharge the compressed refrigerant
gas; an outdoor heat exchanger in which the refrigerant exchanges
heat with outdoor air; and an expansion valve to expand condensed
refrigerant liquid, wherein the outdoor heat exchanger comprises a
plurality of refrigerant tubes and a plurality of headers coupled
to each end portion of each of the plurality of refrigerant tubes,
respectively, and a total length of a refrigerant flow passage in
which a refrigerant flows along the refrigerant tube is equal to or
greater than about 1500 mm and equal to or less than about 6000
mm.
13. The air conditioner of claim 12, wherein: the total length of
the refrigerant flow passage is equal to a length of the
refrigerant tube multiplied by the number of paths in which
refrigerant flows in one way.
14. The air conditioner of claim 13, wherein: the path is formed by
a first path in which the refrigerant flows in a first direction,
and a second flow path which is alternately formed with the first
path and in which the refrigerant flows in a second direction
opposite to the first flow path.
15. The air conditioner of claim 12, further comprising: a
refrigerant conversion apparatus configured to change a flow of
refrigerant, wherein the outdoor heat exchanger is installed to be
converted into one of a condenser that condenses the refrigerant
gas discharged from the compressor into refrigerant liquid to emit
heat to an outside, and into an evaporator that evaporates the
refrigerant liquid expanded in the expansion valve into refrigerant
gas to absorb heat from an outside.
16. The air conditioner of claim 15, wherein: the refrigerant
conversion apparatus is positioned in between the compressor and
the outdoor heat exchanger.
17. The air conditioner of claim 12, wherein: the refrigerant
comprises at least one of R22, R410a, R32, R1234yf, and R1234ze.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of the Korean Patent
Application No. 10-2013-0064217, filed on Jun. 04, 2013, in the
Korean Intellectual Property Office, the disclosure of which is
incorporated herein by reference.
BACKGROUND
[0002] 1. Field
[0003] One or more embodiments relate to an outdoor heat exchanger
and an air conditioner, and more particularly, to an outdoor heat
exchanger and an air conditioner suggesting the optimal total
length of a refrigerant flow passage.
[0004] 2. Description of the Related Art
[0005] In general, an air conditioner is an apparatus configured to
adjust temperature, humidity, air current, and distribution at
suitable level for a human activity, and at the same time, to
eliminate dust in air by use of a refrigeration cycle. As for the
main components which compose the refrigeration cycle, a
compressor, a condenser, an evaporator, an expansion valve, and a
blower fan are provided.
[0006] A heat exchanger is an apparatus being used in the
refrigeration cycle, and is configured to perform a role as a
condenser or an evaporator. The heat exchanger includes a plurality
of heat exchanging fins, and a refrigerant pipe coupled to the
plurality of heat exchanging fins to guide a refrigerant.
[0007] With respect to the heat exchanger, various types of heat
exchangers are present, including the heat exchanger having the
form of a refrigerant pipe, and the heat exchanger having the form
of a refrigerant tube. From the above, a heat exchanger having a
micro-channel refrigerant tube is widely known to be superior in
terms of heat transfer characteristic when compared to other forms
of the heat exchangers. Thus, the heat exchanger having the
micro-channel refrigerant tube is applied as the heat exchanger of
a refrigerating apparatus.
[0008] However, in a case when the micro-channel refrigerant tube
is applied as a heat exchanger of an air conditioner, unevenness in
cooling/heating heat energy transfer performance may occur. Thus,
applying the heat exchanger as such as a heat exchanger of an air
conditioner provided with a dual purpose in freezing/heating is
difficult. In addition, the performance of a heat exchanger may
vary depending on the length of the micro-channel tube or the
passage of a refrigerant.
SUMMARY
[0009] The foregoing described problems may be overcome and/or
other aspects may be achieved by one or more embodiments of an
outdoor heat exchanger designed in a way that the heat exchanger
having a micro-channel tube is provided with high efficiency.
[0010] The foregoing described problems may be overcome and/or
other aspects may be achieved by one or more embodiments of an air
conditioner in which an outdoor heat exchanger is provided to have
the optimal total length of a refrigerant flow passage and
converted for use as an evaporator and a condenser.
[0011] Additional aspects and/or advantages of one or more
embodiments will be set forth in part in the description which
follows and, in part, will be apparent from the description, or may
be learned by practice of one or more embodiments of disclosure.
One or more embodiments are inclusive of such additional
aspects.
[0012] In accordance with one or more embodiments, an outdoor heat
exchanger may include a plurality of refrigerant tubes, a first
header, a second header, and a plurality of heat exchanging fins.
The plurality of refrigerant tubs may be spaced apart from one
another. The first header and a second header may be respectively
coupled to both end portions of each of the plurality of
refrigerant tubes. The plurality of heat exchanging fins may be
coupled to outer surfaces of the plurality of refrigerant tubes to
widen a surface making contact with an outside. A total length of a
refrigerant flow passage in which a refrigerant flows along the
refrigerant tubes and exchanges heat with outdoor air may be, for
example, equal to or greater than about 1500 mm and equal to or
less than about 6000 mm.
[0013] In a case when a heat transfer performance of the outdoor
heat exchanger is equal to or less than about 4000 W, the total
length of the refrigerant flow passage may be, for example, equal
to or greater than about 1500 mm and equal to or less than about
5000 mm.
[0014] In a case when a heat transfer performance of the outdoor
heat exchanger exceeds about 4000 W, the total length of the
refrigerant flow passage may be, for example, equal to or greater
than about 2500 mm and equal to or less than about 6000 mm.
[0015] The outdoor heat exchanger may further include a baffle
provided at an inside of the first header and the second header to
block a longitudinal flow of the refrigerant to change a direction
of the refrigerant.
[0016] The baffle may be installed in plurality at an inside the
first header and the second header.
[0017] The baffle may be installed in plural number lengthwise
along the first header and the second header in an alternate
manner.
[0018] The total length of the refrigerant flow passage may be an
outcome of a length of the refrigerant tube multiplied by the
number obtained by adding 1 to the number of the baffles.
[0019] The refrigerant tube may be, for example, a micro-channel
tube having equal to or less than about 3 mm of hydraulic
diameter.
[0020] The outdoor heat exchanger may be used by converting into a
condenser and an evaporator.
[0021] The refrigerant may include, for example, at least one of
R22 and R410a.
[0022] The refrigerant may include, for example, at least one of
R32, R1234yf, and R1234ze.
[0023] In accordance with one or more embodiments, an air
conditioner may include a compressor, an outdoor heat exchanger and
an expansion valve. The compressor may be configured to compress
refrigerant gas and discharge the compressed refrigerant gas. The
outdoor heat exchanger may be configured to allow refrigerant to
exchange heat with outdoor air. The expansion valve may be
configured to expand condensed refrigerant liquid. The outdoor heat
exchanger may include a plurality of refrigerant tubes disposed
while being spaced apart from one another, and a plurality of
headers coupled to both end portions of each of the plurality of
refrigerant tubes. The total length of a refrigerant flow passage
in which a refrigerant flows along the refrigerant tubes and
exchanges heat with outdoor air may be, for example, equal to or
greater than about 1500 mm and equal to or less than about 6000
mm.
[0024] The total length of the refrigerant flow passage may be an
outcome of a length of the refrigerant tube multiplied by the
number of paths in which refrigerant flows in one way.
[0025] The path may be formed by a first path in which the
refrigerant flows in a first direction and a second flow path which
is alternately formed with the first path and in which the
refrigerant flows in a second direction opposite to the first flow
path.
[0026] The air conditioner may further include a refrigerant
conversion apparatus configured to change a flow of refrigerant.
The outdoor heat exchanger may be installed to be converted into a
condenser that condenses the refrigerant gas discharged from the
compressor into refrigerant liquid to emit heat to an outside, and
into an evaporator that evaporates the refrigerant liquid expanded
in the expansion valve into refrigerant gas to absorb heat from an
outside.
[0027] The refrigerant conversion apparatus may be positioned in
between the compressor and the outdoor heat exchanger.
[0028] The refrigerant may include, for example, at least one of
R22, R410a, R32, R1234yf, and R1234ze.
[0029] As is apparent from the above description, an outdoor heat
exchanger may achieve the optimal performance within the above
suggested range of the total length in which refrigerant flows
along refrigerant tubes and exchanges heat with outdoor air.
[0030] In addition, an air conditioner, which is provided with an
outdoor heat exchanger designed to perform at optimal level and
configured to be converted for use as a condenser or an evaporator,
may be provided.
BRIEF DESCRIPTION OF THE DRAWINGS
[0031] These and/or other aspects will become apparent and more
readily appreciated from the following description of embodiments,
taken in conjunction with the accompanying drawings of which:
[0032] FIG. 1 is a drawing illustrating an outdoor heat exchanger
in accordance with one or more embodiments.
[0033] FIG. 2 is a drawing illustrating a refrigerant tube and a
heat exchanging fin of an outdoor heat exchanger in accordance with
one or more embodiments.
[0034] FIG. 3 is a drawing illustrating a flow of refrigerant of an
outdoor heat exchanger in accordance with one or more
embodiments.
[0035] FIG. 4 is a drawing showing a relation between the unit
performance of an outdoor heat exchanger and the total length of a
refrigerant flow passage in accordance with one or more
embodiments.
[0036] FIG. 5 is a drawing showing a relation between the
performance of an outdoor heat exchanger and the total length of a
refrigerant flow passage in accordance with one or more
embodiments.
[0037] FIG. 6 is a drawing illustrating a refrigeration cycle of an
air conditioner in accordance with one or more embodiments.
[0038] FIG. 7 is a drawing illustrating a heating cycle of an air
conditioner in accordance with one or more embodiments.
DETAILED DESCRIPTION
[0039] Reference will now be made in detail to one or more
embodiments, illustrated in the accompanying drawings, wherein like
reference numerals refer to like elements throughout. In this
regard, embodiments of the present invention may be embodied in
many different forms and should not be construed as being limited
to embodiments set forth herein, as various changes, modifications,
and equivalents of the systems, apparatuses and/or methods
described herein will be understood to be included in the invention
by those of ordinary skill in the art after embodiments discussed
herein are understood. Accordingly, embodiments are merely
described below, by referring to the figures, to explain aspects of
the present invention.
[0040] FIG. 1 is a drawing illustrating an outdoor heat exchanger 1
in accordance with one or more embodiments, and FIG. 2 is a drawing
illustrating a refrigerant tube and a heat exchanging fin of an
outdoor heat exchanger in accordance with one or more
embodiments.
[0041] An outdoor heat exchanger 1 may include a plurality of
refrigerant tubes 20 through which refrigerant flows, a plurality
of heat exchanging fins 30 coupled to outer surfaces of the
plurality of refrigerant tubes 20, a first header 41 and a second
header 42 respectively coupled to both end portions of each of the
plurality of refrigerant tubes 20, and a baffle 50 configured to
change the direction of a flow of refrigerant.
[0042] The refrigerant tube 20 may include a plurality of flow
paths 21 provided at insides thereof with hollowness to allow
liquid refrigerant to flow therethrough, and a partition 22 to
divide the plurality of flow paths 21 from one another. The
plurality of flow paths 21 may be disposed while being spaced apart
from one another in a width direction of the refrigerant tube
20.
[0043] As the refrigerant tube 20, a micro-channel refrigerant tube
may be used, for example. The micro-channel refrigerant tube 20 may
be, for example, a tube having a hydraulic diameter of less than
about 3 mm in general. The hydraulic diameter may be obtained by
dividing the cross section of the tube by the circumference of the
tube.
[0044] Refrigerant may emit heat to the surroundings or absorb heat
from the surroundings through compression or expansion while
flowing along the flow path 21 formed in the refrigerant tube 20.
For the refrigerant to emit heat or absorb heat in an efficient
manner through compression or expansion, the heat exchanging fin 30
may be coupled to the refrigerant tube 20.
[0045] The heat exchanging fin 30 may be disposed in plurality
while being spaced apart from one another at equal intervals in a
direction `C` perpendicular to the direction in which the
refrigerant tube 20 is extended. The heat exchanging fin 30 may be
manufactured by using, for example, aluminum alloy or other
material having high heat conductivity. The heat exchanging fin 30
may be attached to an outer surface of the refrigerant tube 20 to
widen the heat exchanging area of outdoor air and the refrigerant
tube 20.
[0046] As the interval in which the heat exchanging fins 30 are
disposed is narrower, a greater number of the heat exchanging fins
30 may be disposed. However, in a case when the interval between
the heat exchanging fins 30 is excessively narrow, the heat
exchanging fin 30 may serve as a resistance against outdoor air
that is being introduced toward the heat exchanger 1. Thus, since a
concern over pressure drop is present, the interval between the
heat exchanging fins 30 may be properly adjusted.
[0047] The heat exchanging fin 30 may include a plurality of
insertion grooves 31 into which the plurality of refrigerant tubes
20 may be inserted, and a plurality of attaching plates 32 attached
to the plurality of refrigerant tubes 20 in a state that the
plurality of refrigerant tubes 20 may be inserted into the
plurality of insertion grooves 31.
[0048] The insertion groove 31 may be provided in a form that
corresponds to at least one portion of the heat exchanging fin 30,
so that the at least one portion of the heat exchanging fin 30 may
be inserted into the insertion groove 31. The insertion groove 31
may be formed between the plurality of attaching plates 32 that may
be disposed while being spaced apart from one another in an
extension direction of the heat exchanging fin 30.
[0049] The heat exchanging fin 30 may be provided in a form such
that the refrigerant tube 20 may efficiently emit or absorb
heat.
[0050] The first header 41 and the second header 42 may be coupled
to both end portions of each of the plurality of refrigerant tubes
20, so that refrigerant may flow between the plurality of
refrigerant tubes 20. The refrigerant tube 20 may be preferred to
be formed as long as possible so as to widen the heat exchanging
area of the refrigerant and outdoor air. However, a spatial
limitation may limit the length of the refrigerant tube 20 in a
single direction. Thus, the first header 41 and the second header
42 may be coupled to both end portions of the refrigerant tubes 20
to change the direction of the flow of refrigerant. At an inside
the first header 41 and the second header 42, the baffle 50 may be
provided to change the flow of refrigerant.
[0051] The baffle 50 may be provided to allow the flow of
refrigerant entering along the refrigerant tube 20, which may
extend in one direction, to flow in an opposite direction. The
baffle 50 may be installed to prevent the refrigerant entering the
inside the first header 41 and the second header 42 from flowing in
upper and lower side directions.
[0052] The baffle 50 may be installed in plurality inside the first
header 41 and the second header 42 while being spaced apart from
one another. For the refrigerant to pass through the heat exchanger
1 along the refrigerant tube 20 while changing the direction of
flow, the baffles 50 may be provided in an alternate manner at the
first header 41 and the second header 42.
[0053] The outdoor heat exchanger 1 may include a first refrigerant
pipe 43 and a second refrigerant pipe 44 connected to other
refrigeration cycle components to pass refrigerant therethrough.
The first refrigerant pipe 43 and the second refrigerant pipe 44
may be positioned at the first header 41 or the second header 42.
As illustrated on FIG. 1, the first refrigerant pipe 43 and the
second refrigerant pipe 44 may be located at an upper portion and a
lower portion of the second header 42, respectively. One side of
the first refrigerant pipe 43 may be connected to the upper portion
of the second header 42, while the other side of the first
refrigerant pipe 43 may be connected to an expansion apparatus. One
side of the second refrigerant pipe 44 may be connected to the
lower portion of the second header 42, while the other side of the
second refrigerant pipe 44 may be connected to a compressor.
[0054] FIG. 3 is a drawing illustrating a flow of refrigerant of an
outdoor heat exchanger 1 in accordance with one or more
embodiments.
[0055] A first direction `A` is referred as the direction heading
from the second header 42 to the first header 41, and a second
direction `B` is referred to as the direction heading toward the
first header 41 to the second header 42. The first direction `A`
and the second direction `B` both are perpendicular to a direction
`C` in which the heat exchanging fin 30 is inserted into the
refrigerant tube 20.
[0056] Refrigerant entering from the second refrigerant pipe 44
positioned at the lower portion of the second header 42 may be
passed through the refrigerant tube 20 to flow in the first
direction `A`. By a first baffle 50a that may be positioned at the
second header 42, the refrigerant, without flowing toward an upper
portion of the second header 42, may flow along the refrigerant
tube 20 to flow toward the first direction `A`. The refrigerant
that is moved to the first header 41 that may be positioned at the
end of the first direction `A` may enter the first header 41 by
pressure, and by a second baffle 50b that may be positioned at an
inside the first header 41, the refrigerant may flow toward the
second direction `B`.
[0057] The refrigerant that is moved toward the second direction
`B` may be moved to the second header 42 again, and by the first
baffle 50a, the refrigerant may not move toward a lower portion of
the second header 42. A third baffle 50c that may be positioned
above the first baffle 50a inside the second header 42 may change
the direction of the refrigerant again toward the first direction
`A`. That is, inside the second header 42 having a lower portion
closed by the first baffle 50a and an upper portion closed by the
third baffle 50c, the refrigerant nay enter from the second
direction `B` and may exit toward the first direction `A`. The
refrigerant moved toward the first direction `A` may again enter
the first header 41, and by the second baffle 50b, the refrigerant
may not flow downward. The refrigerant having the direction thereof
changed by an end portion 41 a of the first header 41, which is
closed, may flow toward the second direction `B` to exit through
the first refrigerant pipe 43.
[0058] The number of the baffles 50 positioned at the first header
41 and the second header 42 may be provided in a plural number and
at various positions. However, for refrigerant to alternately move
in the first direction `A` and the second direction `B`, the
baffles 50 may be alternately positioned at the first header 41 and
the second header 42.
[0059] In addition, refrigerant may enter the first refrigerant
pipe 43, flow in an opposite direction as described above, and exit
through the second refrigerant pipe 44. That is, the outdoor heat
exchanger 1 may be converted for use as a condenser and an
evaporator. In a case when refrigerant enters the first refrigerant
pipe 43 connected to a compressor 7 to exchange heat with outdoor
air, and exits through the second refrigerant pipe 44 connected to
an expansion valve 3, the heat exchanger 1 may be able to perform a
role as a condenser. In a case when refrigerant enters the second
refrigerant pipe 44 connected to the expansion valve 3 to exchange
heat with outdoor air, and exits through the first refrigerant pipe
43 connected to the compressor 7, the heat exchanger 1 may be able
to perform a role as an evaporator.
[0060] At this time, the total length passed by a certain
refrigerant entering from one of the first refrigerant pipe 43 and
the second refrigerant pipe 44 and exiting to the other one is
referred to as the total length of refrigerant flow passage. That
is, the total length of the refrigerant flow passage is defined as
the total length in which a certain refrigerant exchanges heat with
outdoor air.
[0061] The total length of the refrigerant flow passage as such may
be related to a length 100 of a refrigerant tube connected in
between the first header 41 and the second header 42 and the number
of the baffles 50, as well as the number of paths passed by a
refrigerant in one way. The length 100 of the refrigerant tube may
be a length of one of the plurality of refrigerant tubes 20 that
are spaced apart from one another. The length 100 of the
refrigerant tube may be the value of the minimum distance that
connects the first header 41 to the second header 42. The length
100 of the refrigerant tube 100 as such may be variable as an
independent value.
[0062] The number of the baffles 50 and the number of the paths are
the values that are dependent to each other, and thus, affect each
other. In a case when the number of the baffles 50 is one, a
refrigerant flows after changing the flow direction one time, and
as a result, the number of the paths flowed in one way becomes two.
On the contrary, in a case when the number of the paths having
refrigerant flowing in one way is two, the direction of the flow of
the refrigerant is needed to be changed one time, and thus, the
number of the baffles 50 becomes one. Thus, the total length of the
refrigerant flow passage may be expressed using the length of the
refrigerant tube 20 and the number of the baffles 50, or may also
be expressed using the length of the refrigerant tube 100 and the
number of the paths.
[0063] The total length of the refrigerant flow passage may be
obtained by multiplying the length 100 of the refrigerant tube 20
by the value obtained by adding `1` to the number of the baffles
50. In addition, the total length of the refrigerant flow passage
may be obtained by multiplying the length 100 of the refrigerant
tube by the number of the paths. Since the total length of the
refrigerant flow passage represents only the length in which the
refrigerant exchanges heat, other than the length flowed by the
refrigerant inside the first header 41 and the second header
42.
[0064] With respect to the outdoor heat exchanger 1 illustrated in
FIG. 3, the total length of the refrigerant flow passage becomes
the value obtained by multiplying the length 100 of the refrigerant
tube by the value `4`, which is obtained by adding `1` to `3`, the
number of the baffles 50. In addition, the total length of the
refrigerant flow passage becomes the value obtained by multiplying
the length 100 of the refrigerant tube by `4`, the number of the
paths in which refrigerant is moved in one way.
[0065] FIG. 4 is a drawing showing a relation between the unit
performance of an outdoor heat exchanger and the total length of a
refrigerant flow passage in accordance with one or more
embodiments.
[0066] On the x-axis, the total length of the refrigerant flow
passage in which refrigerant flows along the refrigerant tube 20 to
exchange heat with outdoor air is expressed in millimeters at an
interval of 1000 mm. On the y-axis, the value obtained by dividing
the heat transfer performance of the outdoor heat exchanger by the
heat transfer area is expressed in watts per square meter
(W/m.sup.2) unit at an interval of 1000 W/m.sup.2. For the
convenience of the expression, the x-axis will show the values in
the range of about 0 mm and 8000 mm, and the y-axis will show the
values in the range of about 6000 W/m.sup.2 and 16000
W/m.sup.2.
[0067] A curve expressed on the x-y plane shows that the highest
point is reached in the range when the x-axis value is equal to or
greater than about 1500 mm and equal to or less than about 6000 mm.
Thus, in the range when the total length of the refrigerant flow
passage is equal to or greater than about 1500 mm and equal to or
less than about 6000 mm, the unit heat transfer performance value
may be provided with the highest value.
[0068] FIG. 5 is a drawing showing a relation between the
performance of an outdoor heat exchanger and the total length of
the refrigerant flow passage in accordance with one or more
embodiments.
[0069] On FIG. 4, the line expressed on the x-y plane is shown in a
way that the highest point at an upper portion of the x-y plane is
toward the left side of the x-y plane, and at the lower portion of
the x-y plane, the highest point is toward the right side of the
x-y plane. The above may be distinguished by each performance
level. On the table illustrated on FIG. 5, the heat transfer
performance is shown in watt unit, and the total length of the
refrigerant flow passage is shown in millimeter unit. In a case
when the heat transfer performance of the outdoor heat exchanger 1
is equal to or less than about 4000 W, high efficiency may be
obtained when the total length of the refrigerant flow passage is
equal to or greater than about 1500 mm and equal to or less than
above 5000 mm. In addition, in a case when the heat transfer
performance of the outdoor heat exchanger 1 exceeds about 4000 W,
high efficiency may be obtained when the total length of the
refrigerant flow passage is equal to or greater than about 2500 mm
and equal to or less than above 6000 mm.
[0070] FIG. 6 is a drawing illustrating a refrigeration cycle of an
air conditioner in accordance with one or more embodiments, and
FIG. 7 is a drawing illustrating a heating cycle of an air
conditioner in accordance with one or more embodiments.
[0071] The refrigeration cycle that composes the air conditioner
may include a compressor 7, a condenser, an expansion valve 3, and
an evaporator. The refrigeration cycle may be configured to
circulate a series of processes composed of
compression-condensation-expansion-evaporation, and may be
configured to supply low-temperature air after high-temperature air
exchanges heat with low-temperature refrigerant.
[0072] The compressor 7 may discharge refrigerant gas after
compressing the refrigerant gas in high-temperature/high-pressure
state, and the discharged refrigerant gas may be introduced into
the condenser. The condenser may condense the compressed
refrigerant into a liquid state, and through the condensation
process, heat may be discharged to the surroundings.
[0073] The expansion valve 3 may expand the liquefied refrigerant
in a high-temperature/high-pressure state, which may be condensed
at the condenser, into liquefied refrigerant in a low-pressure
state. The evaporator may evaporate the refrigerant that is
expanded by the expansion valve 3. The evaporator may achieve a
freezing effect by the heat exchange with the subject that is to
freeze, by use of the latent heat of the refrigerant, and may
return the refrigerant gas in a low-temperature/low-pressure state
to the compressor 7. Through such a cycle, the temperature of the
indoor air may be adjusted.
[0074] An outdoor apparatus 200a of the air conditioner may
correspond to the compressor 7 and the outdoor heat exchanger 1 in
the refrigeration cycle. The expansion valve 3 may be present at an
indoor apparatus 200b or at the outdoor apparatus 200a, and an
indoor heat exchanger 5 may be present in the indoor apparatus 200b
of the air conditioner.
[0075] When refrigerant is changed from a gas state into a liquid
state, the heat exchanger may be used as the condenser, and when
refrigerant is changed from a liquid state to a gas state, the heat
exchanger may be used as the evaporator. The outdoor heat exchanger
1 and the indoor heat exchanger 5 may be used as the condenser or
the evaporator. In a case when the outdoor heat exchanger 1
performs a role as the condenser, the indoor heat exchanger may be
used as the evaporator, and in the case when the outdoor heat
exchanger 1 performs a role as the evaporator, the indoor heat
exchanger 5 may be used as the condenser.
[0076] FIG. 6 describes the refrigeration cycle when the outdoor
heat exchanger 1 is used as the condenser and the indoor heat
exchanger 5 is used as the evaporator to cool an indoor space. The
liquefied refrigerant in a high-temperature/high-pressure state,
which may be compressed at the compressor 7, may be introduced to
the outdoor heat exchanger 1. The outdoor heat exchanger 1 may
perform a role as the condenser to condense refrigerant gas into
liquefied refrigerant to possibly discharge heat to outdoor air.
The liquefied refrigerant exited from the outdoor heat exchanger 1
may be expanded at the expansion valve 3, and may be introduced to
the indoor heat exchanger 5. The indoor heat exchanger 5 may
evaporate liquefied refrigerant into refrigerant gas to take away
heat from indoor air, so that the indoor may be cooled.
[0077] FIG. 7 describes the heating cycle when the outdoor heat
exchanger 1 is used as the evaporator and the indoor heat exchanger
5 is used as the condenser to heat an indoor space. In contrast to
the description provided in FIG. 6, refrigerant is moved in an
opposite direction. The refrigerant gas that may be released from
the compressor 7 by a refrigerant conversion apparatus 60 may be
introduced to the indoor heat exchanger 5. The indoor heat
exchanger may emit heat to indoor air, may condense refrigerant gas
into liquefied refrigerant, and may send the liquefied refrigerant
to the expansion valve 3. The refrigerant that may be passed
through the expansion valve 3 may be phase-changed at the outdoor
heat exchanger 1 into refrigerant gas to possibly take away heat
from outdoor air.
[0078] Through the refrigerant conversion apparatus 60 as such,
refrigerant may flow in a clockwise direction or in a
counter-clockwise direction. As a result of the above, the air
conditioner may become the air conditioner having a dual purpose in
cooling/heating indoor air. The refrigerant conversion apparatus 60
may be positioned between the compressor 7 and the outdoor heat
exchanger 1. The refrigerant conversion apparatus 60 may be
installed adjacently to the compressor 7, which may be have the
largest influence in the refrigeration cycle that composes the air
conditioner, so that the direction of refrigerant may be
changed.
[0079] As for the refrigerant, a plurality of refrigerants that may
include, for example, R22, R410a, R32, R1234yf, and R1234ze may be
used. Any refrigerant that includes at least one of R22 and R410a,
which are commonly used in a conventional air conditioner, may be
used, for example, but embodiments are not limited thereto. In
addition, any refrigerant that includes at least one of low GMP
(Low Global Warming Potential) refrigerants, such as R32, R1234yf,
and R1234ze, which are recognized as alternative refrigerants, may
be used, for example, but embodiments are not limited thereto.
[0080] While aspects of the present invention have been
particularly shown and described with reference to differing
embodiments thereof, it should be understood that these embodiments
should be considered in a descriptive sense only and not for
purposes of limitation. Descriptions of features or aspects within
each embodiment should typically be considered as available for
other similar features or aspects in the remaining embodiments.
Suitable results may equally be achieved if the described
techniques are performed in a different order and/or if components
in a described system, architecture, device, or circuit are
combined in a different manner and/or replaced or supplemented by
other components or their equivalents.
[0081] Thus, although a few embodiments have been shown and
described, with additional embodiments being equally available, it
would be appreciated by those skilled in the art that changes may
be made in these embodiments without departing from the principles
and spirit of the invention, the scope of which is defined in the
claims and their equivalents.
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