U.S. patent application number 14/124931 was filed with the patent office on 2014-04-17 for water-cooled condenser.
This patent application is currently assigned to CLASONIC KANSEI CORPORATION. The applicant listed for this patent is Norimitsu Matsudaira, Eiichi Mori. Invention is credited to Norimitsu Matsudaira, Eiichi Mori.
Application Number | 20140102679 14/124931 |
Document ID | / |
Family ID | 47296065 |
Filed Date | 2014-04-17 |
United States Patent
Application |
20140102679 |
Kind Code |
A1 |
Matsudaira; Norimitsu ; et
al. |
April 17, 2014 |
WATER-COOLED CONDENSER
Abstract
A water-cooled condenser that exchanges heat between refrigerant
of an air conditioner for a vehicle and coolant, and then send the
refrigerant out to a air-cooled condenser through a refrigerant
outlet port. The refrigerant outlet port is connected with the
air-cooled condenser at a position that doesn't overlap a bumper
reinforcement arranged in front of the air-cooled condenser at a
front section of the vehicle when viewed along an airflow direction
toward the air-cooled condenser. In the water-cooled condenser, the
refrigerant that flows into the air-cooled condenser through the
refrigerant outlet port flows much at a position that doesn't
overlap the bumper reinforcement, so that superior heat radiation
performance can be brought by a sufficient cooling airflow volume.
Therefore, total heat radiation performance achieved by the
air-cooled condenser and the water-cooled condenser can be
improved.
Inventors: |
Matsudaira; Norimitsu;
(Saitama-shi, Saitama, JP) ; Mori; Eiichi;
(Saitama-shi, Saitama, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Matsudaira; Norimitsu
Mori; Eiichi |
Saitama-shi, Saitama
Saitama-shi, Saitama |
|
JP
JP |
|
|
Assignee: |
CLASONIC KANSEI CORPORATION
|
Family ID: |
47296065 |
Appl. No.: |
14/124931 |
Filed: |
June 6, 2012 |
PCT Filed: |
June 6, 2012 |
PCT NO: |
PCT/JP2012/064502 |
371 Date: |
December 9, 2013 |
Current U.S.
Class: |
165/143 |
Current CPC
Class: |
B60K 2001/003 20130101;
F28D 1/0461 20130101; F28D 2021/0084 20130101; B60H 1/00342
20130101; F28D 1/0443 20130101; F28F 9/26 20130101; B60K 11/04
20130101; B60H 1/3227 20130101; B60K 11/02 20130101; B60Y 2306/01
20130101 |
Class at
Publication: |
165/143 |
International
Class: |
F28F 9/26 20060101
F28F009/26 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 10, 2011 |
JP |
2011-129915 |
Claims
1. A water-cooled condenser that exchanges heat between refrigerant
of an air conditioner for a vehicle and coolant, and then send the
refrigerant out to a air-cooled condenser through a refrigerant
outlet port, wherein the refrigerant outlet port is connected with
the air-cooled condenser at a position that doesn't overlap a
bumper reinforcement arranged in front of the air-cooled condenser
at a front section of the vehicle when viewed along an airflow
direction toward the air-cooled condenser.
2. The water-cooled condenser according to claim 1, wherein the
refrigerant outlet port is disposed closely beneath the bumper
reinforcement.
3. The water-cooled condenser according to claim 1, wherein the
refrigerant outlet port is disposed closely above the bumper
reinforcement.
4. The water-cooled condenser according to claim 1, wherein a
sub-radiator for exchanging heat between the coolant and outside
air is provided above or under the air-cooled condenser, and the
bumper reinforcement is disposed so as to overlap a portion of the
air-cooled condenser and a portion of the sub-radiator.
5. The water-cooled condenser according to claim 4, wherein a
coolant inlet port to the sub-radiator is disposed at a position
that doesn't overlap the bumper reinforcement when viewed along the
airflow direction.
6. The water-cooled condenser according to claim 4, wherein the
water-cooled condenser is disposed on one side of the sub-radiator
and the air-cooled condenser, and a liquid tank for accumulating
part of the refrigerant is disposed on another side of the
air-cooled condenser.
Description
TECHNICAL FIELD
[0001] The present invention relates to a water-cooled condenser,
especially to a water-cooled condenser suitable for exchanging heat
of refrigerant of an air-conditioner for a vehicle.
BACKGROUND ART
[0002] A Patent Document 1 and a Patent Document 2 listed below
disclose a water-cooled condenser installed within a side tank of a
sub-radiator. In addition, a Patent Document 3 listed below
discloses an air-cooled condenser and a radiator arranged lower
than a bumper reinforcement.
PRIOR ART DOCUMENT
Patent Documents
[0003] Patent Document 1: Japanese Patent Application Laid-Open No.
2010-121604
[0004] Patent Document 2: Japanese Patent Application Laid-Open No.
2010-127508
[0005] Patent Document 3: Japanese Patent Application Laid-Open No.
2005-22474
SUMMARY OF INVENTION
[0006] In the configurations disclosed in the Patent Document 1 and
the Patent Document 2, a bumper reinforcement is disposed at a
front section of a vehicle for collision safety. Since front
surfaces of the condenser and the sub-radiator are covered by the
bumper reinforcement, cooling airflow volume reduces and thereby
heat radiation performance reduces. In addition, a size of the
sub-radiator becomes large due to the built-in water-cooled
condenser in the side tank of the sub-radiator, so that designing
of layout is restricted in a case of a vehicle whose front section
has a relatively narrow space. In addition, a pipe(s) is protruded
forward from the water-cooled condenser, so that arrangement of the
bumper reinforcement in a front section of a vehicle becomes
difficult and refrigerant leakage from the refrigerant pipe(s)
protruded forward is apprehended in a slight collision to a front
section of a vehicle.
[0007] In the configuration disclosed in the Patent Document 3,
since the air-cooled condenser and the radiator are arranged lower
than the bumper reinforcement, heat radiation performance is good
due to a sufficient cooling airflow volume. However, installation
of a water-cooled condenser is not considered in the
configuration.
[0008] An object of the present invention is to provide a
water-cooled condenser that can improve heat radiation performance
and can be adapted to arrangement of a bumper reinforcement at a
front section of a vehicle.
[0009] An aspect of the present invention provides a water-cooled
condenser that exchanges heat between refrigerant of an air
conditioner for a vehicle and coolant, and then send the
refrigerant out to a air-cooled condenser through a refrigerant
outlet port, wherein the refrigerant outlet port is connected with
the air-cooled condenser at a position that doesn't overlap a
bumper reinforcement arranged in front of the air-cooled condenser
at a front section of the vehicle when viewed along an airflow
direction toward the air-cooled condenser.
[0010] According to the aspect, since the refrigerant outlet port
of the water-cooled condenser is connected with the air-cooled
condenser at the position that doesn't overlap the bumper
reinforcement, the refrigerant that flows into the air-cooled
condenser through the refrigerant outlet port flows much at the
position that doesn't overlap the bumper reinforcement and thereby
superior heat radiation performance can be brought by a sufficient
cooling airflow volume. Therefore, total heat radiation performance
achieved by the air-cooled condenser and the water-cooled condenser
can be improved and the water-cooled condenser can be adapted to
arrangement of the bumper reinforcement at the front section of the
vehicle.
[0011] Here, it is preferable that the refrigerant outlet port is
disposed above or beneath the bumper reinforcement. Namely, the
refrigerant outlet port is shifted vertically so as not to overlap
the bumper reinforcement, and a position with a small refrigerant
flow rate right next to the above-mentioned position where the
refrigerant flows much overlaps the bumper reinforcement. As a
result, affection by reduction of a cooling airflow volume can be
restricted to a minimum to improve total heat radiation
performance.
[0012] In addition, it is preferable that a sub-radiator for
exchanging heat between the coolant and outside air is provided
above or under the air-cooled condenser, and the bumper
reinforcement is disposed so as to overlap a portion of the
air-cooled condenser and a portion of the sub-radiator. According
to this, affection by reduction of a cooling airflow volume can be
dispensed to the air-cooled condenser and the sub-radiator, and a
refrigerant pipe between the water-cooled condenser and the
air-cooled condenser and a coolant pipe between the water-cooled
condenser and the sub-radiator can be shortened.
[0013] Here, it is preferable that a coolant inlet port to the
sub-radiator is disposed at a position that doesn't overlap the
bumper reinforcement when viewed along the airflow direction.
According to this, the coolant that flows into the sub-radiator
through the coolant inlet port flows much at the position that
doesn't overlap the bumper reinforcement and thereby superior heat
radiation performance can be brought by a sufficient cooling
airflow volume. As a result, temperature of the coolant used for
the water-cooled condenser is reduced to improve total heat
radiation performance achieved by the air-cooled condenser and the
water-cooled condenser.
[0014] In addition, it is preferable that the water-cooled
condenser is disposed on one side of the sub-radiator and the
air-cooled condenser, and a liquid tank for accumulating part of
the refrigerant is disposed on another side of the air-cooled
condenser. According to this, the water-cooled condenser or the
liquid tank can be prevented from contacting with the bumper
reinforcement in a slight collision of a vehicle, and thereby
refrigerant leakage can be prevented.
BRIEF DESCRIPTION OF DRAWINGS
[0015] [FIG. 1] It is a front view of a combined heat exchanger
including a water-cooled condenser according to a first
embodiment.
[0016] [FIG. 2] It is a front view showing positions of a
refrigerant inlet port and a refrigerant outlet port in the
water-cooled condenser when measuring refrigerant flow rate.
[0017] [FIG. 3] It is a chart showing measured results of
refrigerant flow rate.
[0018] [FIG. 4] It is a front view showing a modified example of a
coolant flow passage in the first embodiment.
[0019] [FIG. 5] It is a front view of a combined heat exchanger
including a water-cooled condenser according to a second
embodiment.
[0020] [FIG. 6] It is a front view showing a modified example of a
coolant flow passage in the second embodiment.
DESCRIPTION OF EMBODIMENTS
[0021] Hereinafter, a combined heat exchanger including a
water-cooled condenser according to an embodiment(s) will be
explained with reference to the drawings.
[0022] (First Embodiment)
[0023] As shown in FIG. 1, the combined heat exchanger 1 includes a
sub-radiator 2, an in-compartment air-cooled condenser 3, and a
water-cooled condenser 4. The sub-radiator 2 exchanges heat between
coolant for cooling a heat-generating object (e.g. an inverter when
a vehicle is an EV or an HEV) and outside air (to reduce
temperature of the coolant). The air-cooled condenser 3 is disposed
under the sub-radiator 2, and exchanges heat between refrigerant
for air-conditioning and outside air (to reduce temperature of the
refrigerant). The water-cooled condenser 4 is disposed beside (on a
left side in FIG. 1) the sub-radiator 2 and the air-cooled
condenser 3. A bumper reinforcement 9 for collision safety is
disposed in front of the sub-radiator 2, the air-cooled condenser
3, and the water-cooled condenser 4.
[0024] The air-cooled condenser 3 includes a core 30, and a pair of
a first tank 31 and a second tank 32. In the core 30, tubes and
heat-radiation fins are vertically stacked alternately. The first
tank 31 and the second tank 32 are attached to side ends of the
core 30, respectively, and are communicated with the tubes. The
air-cooled condenser 3 is a subcooling-type condenser, and the core
30 is divided into a condensing section 30a on its upper side and a
subcooling section 30b on its lower side. Each inside of the first
tank 31 and the second tank 32 is also partitioned into upper and
lower sections in accordance with the condensing section 30a and
the subcooling section 30b.
[0025] The refrigerant flows into the air-cooled condenser 3 from
an upper portion of the first tank 31. The refrigerant flows
through the condensing section 30a rightward in FIG. 1, and then
flows downward in the upper section of the second tank 32, and
flows into the lower section of the second tank 32 via a liquid
tank 33 connected with the second tank 32. The refrigerant flows
into the subcooling section 30b from the lower section of the
second tank 32. The refrigerant flows through the subcooling
section 30b rightward in FIG. 1, and then flows out from the
air-cooled condenser 3 via the lower section of the first tank 31.
Note that the liquid tank 33 may be a gas-liquid separator for
separating refrigerant liquid and refrigerant gas, or a modulator
provided in a subcooling-type condenser.
[0026] The water-cooled condenser 4 in the present embodiment is
connected with the sub-radiator 2 and the air-cooled condenser 3. A
flow passage for the coolant and a flow passage for the refrigerant
are separated with each other in the inside of the water-cooled
condenser 4 and the coolant and the refrigerant are not mingled,
but heat is exchanged between the coolant and the refrigerant (the
refrigerant is cooled by the coolant).
[0027] The coolant that flows out from the sub-radiator 2 flows
into an upper portion of the water-cooled condenser 4 through a
flexible coolant flow-in pipe 5 disposed at an upper end of the
water-cooled condenser 4. The coolant flows downward in an inner
flow passage of the water-cooled condenser 4, and then flows out
from a lower portion of the water-cooled condenser 4 through a
coolant flow-out pipe 6 disposed at the lower portion of the
water-cooled condenser 4 to return to the inverter.
[0028] On the other hand, the refrigerant flows into the
water-cooled condenser 4 through a refrigerant flow-in pipe 7. The
refrigerant flows downward in an inner flow passage of the
water-cooled condenser 4, and then flows into the air-cooled
condenser 3 through an intermediate connecting member 8 within
which a refrigerant outlet port 8a is formed. The intermediate
connecting member 8 is connected with the first tank 31 of the
air-cooled condenser 3 slightly beneath (closely beneath) (an lower
edge of) the bumper reinforcement 9.
[0029] In addition, the water-cooled condenser 4 includes a casing
40 extended vertically. A heat exchanging portion (refrigerant flow
passage) where heat is exchanged between the refrigerant and the
coolant and a tank (coolant flow passage) formed between the heat
exchanging portion and the casing 40 for accumulating the coolant
are provided within the casing 40.
[0030] The water-cooled condenser 4 is disposed independently
beside the sub-radiator 2 and the air-cooled condenser 3 (lateral
to the sub-radiator 2 and the air-cooled condenser 3 in parallel to
the bumper reinforcement 9). The lower portion of the water-cooled
condenser 4 is attached to a sidewall of the first tank 31 of the
air-cooled condenser 3 via the intermediate connecting member 8,
and fixed with the first tank 31 of the air-cooled condenser 3 by a
bracket 42. On the other hand, the upper portion of the
water-cooled condenser 4 is fixed with the sub-radiator 2 via a
bracket 41. In addition, the upper end of the water-cooled
condenser 4 is connected with a sidewall 20 of the sub-radiator 2
via the flexible coolant flow-in pipe 5.
[0031] According to the water-cooled condenser 4 in the present
embodiment, the intermediate connecting member 8 (refrigerant
outlet port 8a) is connected with the air-cooled condenser 3
slightly beneath (the lower edge of) the bumper reinforcement 9,
i.e. at a position that doesn't overlap the bumper reinforcement 9
(a position shifted vertically so as not to overlap when viewed
from a front of the vehicle: a position that doesn't overlap when
viewed along a direction of airflow toward the air-cooled condenser
3). Since the refrigerant flows into the air-cooled condenser 3
through the refrigerant outlet port 8a, the refrigerant flows much
in the tube(s) at a level of the above-explained connection
position. Therefore, since the connection position is located
slightly beneath the bumper reinforcement 9, a cooling airflow
volume is large and thereby heat radiation performance doesn't
reduce. As a result, total heat radiation performance achieved by
the air-cooled condenser 3 and the water-cooled condenser 4 is
improved, and the water-cooled condenser 4 according to the present
embodiment can be adapted to arrangement of the bumper
reinforcement 9 at a front section of a vehicle.
[0032] Note that, as shown in FIG. 2, distribution of refrigerant
flow rate in the air-cooled condenser 3, in a case where an inlet
port 34 and an outlet port 35 of the refrigerant are located at a
vertical middle position of the air-cooled condenser 3, is shown in
[Table 1] shown below. Namely, when an uppermost tube position is
denoted as "1" and a lowermost tube position is denoted as "20",
the inlet port 34 and the outlet port 35 are located at tube
positions "10, 11". Then, the refrigerant flow rate is highest at
the positions "10, 11", and the refrigerant flow rate is lowest at
positions "9, 12" right next to them.
TABLE-US-00001 TABLE 1 TUBE POSITION 1 2 3 4 5 6 7 8 9 10
REFRIGERANT 1.043 1.038 1.034 1.037 1.037 1.037 1.034 1.035 0.967
1.177 FLOW RATE % (PERCENTAGE) 99.9 99.4 99.0 99.3 99.3 99.3 99.0
99.1 92.6 112.7 TUBE POSITION 11 12 13 14 15 16 17 18 19 20 AVERAGE
REFRIGERANT 1.177 0.967 1.035 1.034 1.038 1.037 1.038 1.034 1.038
1.043 1.044 FLOW RATE % (PERCENTAGE) 112.7 92.68 99.1 99.0 99.4
99.3 99.4 99.0 99.4 99.9
[0033] Since the refrigerant flow rate and the heat radiation
amount are proportional, the tubes at the positions "10, 11" of the
air-cooled condenser 3 are set slightly beneath the bumper
reinforcement 9 (shown by a rectangular indicated by dashed-dotted
lines in FIG. 3), and the tube at the position "9" is located so as
to overlap the bumper reinforce 9. According to this, the tubes
located at the positions "10, 11" with the high refrigerant flow
rate can radiate heat sufficiently with no affection by the bumper
reinforcement 9. The tube at the position "9" may be affected by
the bumper reinforcement 9, but its refrigerant flow rate is low
and thereby the total heat radiation performance is hardly
affected. As a result, the total heat radiation performance
achieved by the air-cooled condenser 3 and the water-cooled
condenser 4 is improved and the water-cooled condenser 4 can be
adapted to arrangement of the bumper reinforcement 9 at a front
section of a vehicle.
[0034] In addition, since the water-cooled condenser 4 according to
the present embodiment is not installed within the side tank of the
sub-radiator 2 but provided independently beside the sub-radiator
2, the sub-radiator 2 can be downsized. As a result, the combined
heat exchanger 1 can be disposed even in a vehicle whose front
section has a relatively narrow space, and the water-cooled
condenser 4 according to the present embodiment is superior in view
of designing of layout.
[0035] In addition, according to the water-cooled condenser 4 in
the present embodiment, the coolant flow-in pipe 5 and the coolant
flow-out pipe 6 are protruded laterally (in a width direction of a
vehicle), and not protruded forward (toward the bumper
reinforcement 9). Therefore, it is easy to arrange the bumper
reinforcement 9 at a front section of a vehicle, and the
water-cooled condenser 4 according to the present embodiment is
superior in view of designing of layout. Further, since the
refrigerant pipes are not also protruded forward, it is easy to
arrange the bumper reinforcement 9 at a front section of a vehicle
in view of this point and refrigerant leakage from the refrigerant
pipes can be prevented in a slight collision to a front section of
a vehicle.
[0036] In addition, the sub-radiator 2 and the air-cooled condenser
3 are coupled by the water-cooled condenser 4 in the present
embodiment, and thereby the water-cooled condenser 4 functions as a
connection bracket. Therefore, a dedicated bracket for coupling the
sub-radiator 2 and the air-cooled condenser 3 is not required, so
that the number of parts can be reduced.
[0037] In addition, the water-cooled condenser 4 in the present
embodiment is connected with the sub-radiator 2 via the flexible
coolant flow-in pipe 5. Therefore, deviations of an assembling
position between the sub-radiator 2 and the water-cooled condenser
4 can be settled by the flexibility of the coolant flow-in pipe 5,
so that assembling works can be done smoothly.
[0038] Note that, in the present embodiment, the coolant flows into
the water-cooled condenser 4 from its upper end through the coolant
flow-in pipe 5, and flows out from the lower portion of the
water-cooled condenser 4 through the coolant flow-out pipe 6.
However, a flow of the coolant is not limited to this, a flow of
the coolant may be set reversely. Namely, as shown in FIG. 4, the
coolant may flow into the lower portion of the water-cooled
condenser 4 through a coolant flow-in pipe 50 provided at the lower
portion of the water-cooled condenser 4, and may flow out from the
upper end of the water-cooled condenser 4 via a flexible coolant
flow-out pipe 60 provided at the upper end of the water-cooled
condenser 4. But, the configuration shown in FIG. 1 is preferred,
because the coolant after being cooled by the sub-radiator 2 flows
into the water-cooled condenser 4.
[0039] (Second Embodiment)
[0040] As shown in FIG. 5, in a water-cooled condenser 4A according
to the present embodiment, the intermediate connecting member 8
(refrigerant outlet port 8a) is connected with the first tank 31 of
the air-cooled condenser 3 slightly above (closely above) (an upper
edge of) the bumper reinforcement 9. The air-cooled condenser 3 is
disposed above the sub-radiator 2, and the water-cooled condenser
4A is disposed beside (on a left side in FIG. 5) the sub-radiator 2
and the air-cooled condenser 3. Note that, in the present
embodiment, components identical or equivalent to those in the
first embodiment are labeled by the identical numbers.
[0041] The coolant that has flown out from the sub-radiator 2 flows
into the water-cooled condenser 4 through a flexible coolant
flow-in pipe 5A disposed at a lower end of the water-cooled
condenser 4A. The coolant flows upward in an inner flow passage of
the water-cooled condenser 4A, and then flows out from an upper
portion of the water-cooled condenser 4A through a coolant flow-out
pipe 6A disposed at an upper end of the water-cooled condenser 4A
to return to the inverter.
[0042] On the other hand, the refrigerant flows into the
water-cooled condenser 4A through the refrigerant flow-in pipe 7.
The refrigerant exchanges heat with the coolant while flowing
downward in an inner flow passage of the water-cooled condenser 4A,
and then flows into the air-cooled condenser 3 through the
intermediate connecting member 8 within which the refrigerant
outlet port 8a is formed.
[0043] In the present embodiment, the intermediate connecting
member 8 (refrigerant outlet port 8a) is connected with the
air-cooled condenser 3 slightly above (the upper edge of) the
bumper reinforcement 9, i.e. at a position that doesn't overlap the
bumper reinforcement 9 (a position vertically shifted so as not to
overlap when viewed from a front of the vehicle: a position that
doesn't overlap when viewed along a direction of airflow toward the
air-cooled condenser 3). Since the refrigerant flows into the
air-cooled condenser 3 through the refrigerant outlet port 8a, the
refrigerant flows much in the tube(s) at a level of the
above-explained connection position. Therefore, since the
connection position is located slightly above the bumper
reinforcement 9, a cooling airflow volume is large and thereby heat
radiation performance doesn't reduce. As a result, total heat
radiation performance achieved by the air-cooled condenser 3 and
the water-cooled condenser 4A is improved, and the water-cooled
condenser 4A according to the present embodiment can be adapted to
arrangement of the bumper reinforcement 9 at a front section of a
vehicle.
[0044] Note that, in the present embodiment, the coolant flows into
the water-cooled condenser 4A from its lower end through the
coolant flow-in pipe 5A, and flows out from the upper portion of
the water-cooled condenser 4A through the coolant flow-out pipe 6.
However, a flow of the coolant is not limited to this, a flow of
the coolant may be set reversely. Namely, as shown in FIG. 6, the
coolant may flow into the upper portion of the water-cooled
condenser 4A through a coolant flow-in pipe 50A provided at the
upper end of the water-cooled condenser 4A, and may flow out from
the lower end of the water-cooled condenser 4A through a flexible
coolant flow-out pipe 60A provided at the lower end of the
water-cooled condenser 4. But, the configuration shown in FIG. 5 is
preferred, because the coolant after being cooled by the
sub-radiator 2 flows into the water-cooled condenser 4A.
[0045] In addition, when comparing the first embodiment (FIG. 1)
and its modified example (FIG. 4) with the second embodiment (FIG.
5) and its modified example (FIG. 6), the first embodiment (FIG. 1)
and its modified example (FIG. 4) are preferred because the
subcooling section 30b of the air-cooled condenser 3 doesn't
overlap the bumper reinforcement 9 and the subcooling section 30b
functions sufficiently.
* * * * *