U.S. patent application number 12/784165 was filed with the patent office on 2010-12-02 for hybrid desiccant dehumidifying apparatus and control method thereof.
This patent application is currently assigned to Air-Tech Engineering Co., Ltd.. Invention is credited to Dong Hyuk KIM, Seung Tae PARK, Sung Chan PARK.
Application Number | 20100300123 12/784165 |
Document ID | / |
Family ID | 42083601 |
Filed Date | 2010-12-02 |
United States Patent
Application |
20100300123 |
Kind Code |
A1 |
PARK; Seung Tae ; et
al. |
December 2, 2010 |
HYBRID DESICCANT DEHUMIDIFYING APPARATUS AND CONTROL METHOD
THEREOF
Abstract
Disclosed are a hybrid desiccant dehumidifying apparatus and a
control method thereof which are employed under poor environment,
such as a ship painting field. External air cooled by an evaporator
is dehumidified and heated while passing through a desiccant
dehumidifier and external air heated by condensation heat of a
condenser is supplied to the desiccant dehumidifier as a
regeneration air source such that high-temperature and
high-humidity regeneration. A cooler is integrally formed with the
desiccant dehumidifier so that the hybrid desiccant dehumidifying
apparatus is manufactured in a compact size and the operating cost
thereof is significantly reduced.
Inventors: |
PARK; Seung Tae;
(Seongnam-si, KR) ; KIM; Dong Hyuk; (Seongnam-si,
KR) ; PARK; Sung Chan; (Seongnam-si, KR) |
Correspondence
Address: |
Jae Y. Park
Kile, Park, Goekjian, Reed & McManus, PLLC, 1200 New Hampshire Ave. NW,
Suite 570
Washington
DC
20036
US
|
Assignee: |
Air-Tech Engineering Co.,
Ltd.
Seongnam-si
KR
|
Family ID: |
42083601 |
Appl. No.: |
12/784165 |
Filed: |
May 20, 2010 |
Current U.S.
Class: |
62/94 ; 62/115;
62/271; 62/275; 62/498 |
Current CPC
Class: |
F24F 12/003 20130101;
Y02B 30/563 20130101; Y02B 30/52 20130101; B01D 53/261 20130101;
F24F 2203/1032 20130101; F24F 2203/1084 20130101; F24F 2012/007
20130101; B01D 53/06 20130101; F24F 5/001 20130101; F24F 2203/1016
20130101; F24F 11/0008 20130101; Y02B 30/56 20130101; B01D 2253/106
20130101; F24F 3/1423 20130101; F24F 2203/1068 20130101 |
Class at
Publication: |
62/94 ; 62/271;
62/498; 62/275; 62/115 |
International
Class: |
F25D 17/04 20060101
F25D017/04; F25B 15/00 20060101 F25B015/00; F25B 1/00 20060101
F25B001/00; F25D 21/00 20060101 F25D021/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 1, 2009 |
KR |
10-2009-0048239 |
Claims
1. A hybrid desiccant dehumidifying apparatus comprising: a first
external air receiving line into which external air is introduced;
an evaporator installed in the first external air receiving line to
cool the external air through a heat exchange reaction; a
compressor for compressing a refrigerant that has passed through
the evaporator; a condenser for condensing the refrigerant that has
passed through the compressor; a capillary tube for expanding the
refrigerant that has passed through the condenser; a desiccant
rotor for dehumidifying and heating the external air cooled by the
evaporator; a heated air supply line for supplying the external
air, which is introduced through a second external air receiving
line connected to the condenser, to the desiccant rotor after the
external air is heated by condensation heat of the condenser; a
regeneration air exhaust line which exhausts regeneration air
having high-temperature and high-humidity by receiving the
regeneration air from the desiccant rotor; an air feeding line for
feeding processed air, which is dehumidified and heated while
passing through the desiccant rotor, to a dehumidifying space such
that the dehumidifying space keeps predetermined internal
temperature and internal humidity; and a controller selectively
cooling, dehumidifying or heating the external air according to
external temperature and humidity conditions, wherein a filter is
installed at an inlet side of the evaporator and an eliminator is
installed at an outlet side of the evaporator.
2. The hybrid desiccant dehumidifying apparatus as claimed in claim
1, wherein a first bypass is provided to connect the outlet side of
the evaporator to the regeneration air exhaust line.
3. The hybrid desiccant dehumidifying apparatus as claimed in claim
1, wherein a second bypass is provided to connect the heated air
supply line to the air feeding line such that the external air
heated by the condenser is introduced into the dehumidifying space
through the air feeding line without driving the desiccant rotor
under a condition of low temperature and low humidity.
4. The hybrid desiccant dehumidifying apparatus as claimed in claim
1, wherein a heater is installed in the heated air supply line to
heat the air that has passed through the condenser such that the
air has a higher temperature.
5. A method of controlling a hybrid desiccant dehumidifying
apparatus including a first external air receiving line into which
external air is introduced, an evaporator installed in the first
external air receiving line to cool the external air through a heat
exchange reaction, a compressor for compressing a refrigerant that
has passed through the evaporator, a condenser for condensing the
refrigerant that has passed through the compressor, a capillary
tube for expanding the refrigerant that has passed through the
condenser, a desiccant rotor for dehumidifying and heating the
external air cooled by the evaporator, a heated air supply line for
supplying the external air, which is introduced through a second
external air receiving line connected to the condenser, to the
desiccant rotor after the external air is heated by condensation
heat of the condenser, a regeneration air exhaust line which
exhausts regeneration air by receiving the regeneration air from
the desiccant rotor, an air feeding line for feeding processed air,
which is dehumidified and heated while passing through the
desiccant rotor, to a dehumidifying space such that the
dehumidifying space keeps predetermined internal temperature and
internal humidity, and a controller selectively cooling,
dehumidifying, heating or blowing the external air according to
external temperature and humidity conditions to generate the
processed air which is supplied to the dehumidifying space such
that the temperature and the humidity in the dehumidifying space
are maintained in a target level, the method comprising: operating
the compressor, the condenser, the evaporator and the capillary
tube to cool and dehumidify the external air introduced through the
first external air receiving line; supplying the external air,
which is heated by condensation heat of the condenser, to the
desiccant rotor through the heated air supply line; supplying the
processed air, which is dehumidified and heated by heat-exchanging
the regeneration air with the external air supplied through the
first external air receiving line in the desiccant rotor, to the
dehumidifying space through the air feeding line; supplying some of
the external air, which has been cooled and dehumidified, to the
air feeding line through a third bypass to cool the external air;
and supplying the cooled external air to the dehumidifying space,
thereby keeping the dehumidifying space with proper temperature and
humidity in a summer season in which the external air has higher
temperature and higher humidity.
6. The method as claimed in claim 5, further comprising: stopping
operation of the compressor, the condenser, the evaporator and the
capillary tube; and shutting off a regeneration part of the
desiccant rotor using a damper and opening a second bypass to allow
the external air passing through a coil of the condenser to be
supplied to the dehumidifying space through the air feeding line in
such a way that a cooling operation is performed through
circulation of the external air without operating a cooler in a
spring season or an autumn season in which the external air has low
temperature and low humidity.
7. The method as claimed in claim 5, further comprising: operating
the compressor, the condenser, the evaporator and the capillary
tube to cool the external air introduced through the first external
air receiving line; opening a first bypass to exhaust the external
air cooled by the evaporator through the regeneration air exhaust
line; and shutting off a regeneration part of the desiccant rotor
and opening a second bypass to supply the external air heated by
condensation heat of the condenser to the dehumidifying space
through air feeding line in such a way that the external air heated
by the condensation heat of the condenser is further heated by a
heater in a winter season in which the external air has low
temperature and low humidity.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a hybrid desiccant
dehumidifying apparatus and a control method thereof. More
particularly, the present invention relates to a hybrid desiccant
dehumidifying apparatus and a control method thereof which can be
employed under poor environment, such as a ship painting field, in
which external air pre-cooled by an evaporator is dehumidified and
heated while passing through a desiccant dehumidifier and external
air heated by condensation heat of a condenser is supplied to the
desiccant dehumidifier as a regeneration air source such that
high-temperature and high-humidity regeneration air can be
exhausted to the outside through the heat exchange reaction, and in
which a cooler is integrally formed with the desiccant dehumidifier
so that the hybrid desiccant dehumidifying apparatus can be
manufactured in a compact size and the operating cost thereof can
be significantly reduced.
[0003] 2. Description of the Related Art
[0004] In general, an air conditioner is employed to perform the
air conditioning operation (cooling and dehumidifying operation).
The air conditioner includes an indoor unit and an outdoor unit and
a refrigerant is circulated between the indoor unit and the outdoor
unit while being subject to the phase change reaction.
[0005] The refrigerant having the liquid phase is evaporated
through an evaporator of the indoor unit by absorbing heat from
ambient air so that cooled air can be exhausted to the interior of
a room. Then, the refrigerant having the vapor phase is transferred
to a compressor of the outdoor unit.
[0006] The compressor compresses the refrigerant such that the
refrigerant may have the high-temperature and high-pressure. Then,
the refrigerant having the high-temperature and high-pressure is
transferred to a condenser of the outdoor unit such that the
refrigerant can be condensed into the liquid phase by the
condenser. At this time, ambient air absorbs heat from the
refrigerant so that the refrigerant having the vapor phase is
changed into the refrigerant having the liquid phase. In addition,
the heated ambient air is exhausted to the outside by means of a
blowing fan.
[0007] In the case of the dehumidifying operation, the ambient air
is cooled to the temperature sufficient for condensing humidity
contained in the ambient air such that the humidity can be
separated from the ambient air.
[0008] In general, the temperature for condensing the humidity is
lower than the temperature available during the air conditioning
operation, so over-cooled air may be exhausted to the interior of
the room, causing unpleasant to the users.
[0009] Therefore, the temperature of the air must be properly
adjusted by reheating the air before the air is exhausted to the
interior of the room.
[0010] Since the air conditioning system must be equipped with the
humidity control function as well as the temperature control
function, the cooling and reheating operation is necessary in the
air conditioning system.
[0011] There has been suggested a method of utilizing some of
condensation heat in an indoor unit of a currently available
household air conditioner. However, in the case of a duct type air
conditioning system, a separate heat source is required.
[0012] Meanwhile, the conventional air conditioning system is
unsuitable for poor environment, such as a ship painting field or a
working place where dangerous materials are treated and circulated
air cannot be reused.
[0013] In addition, since the circulated air cannot be reused, the
cooling and dehumidifying apparatus must be operated for a long
period of time to properly set the temperature and humidity, so
that energy consumption is increased.
SUMMARY OF THE INVENTION
[0014] Accordingly, the present invention has been made to solve
the above-mentioned problems occurring in the prior art, and an
object of the present invention is to provide a hybrid desiccant
dehumidifying apparatus and a control method thereof which can be
employed under poor environment, such as a ship painting field, in
which external air pre-cooled by an evaporator of a pneumatic
cooler is dehumidified and heated while passing through a desiccant
dehumidifier and the external air heated by condensation heat of a
condenser is supplied to the desiccant dehumidifier as a
regeneration air source such that the external air can be
dehumidified and heated through the heat exchange reaction, and in
which a cooler is integrally formed with the desiccant dehumidifier
so that the hybrid desiccant dehumidifying apparatus can be
manufactured in a compact size and the operating cost thereof can
be significantly reduced.
[0015] In order to accomplish the object of the present invention,
there is provided a hybrid desiccant dehumidifying apparatus
comprising: a first external air receiving line into which external
air is introduced; an evaporator installed in the first external
air receiving line to cool the external air through a heat exchange
reaction; a compressor for compressing a refrigerant that has
passed through the evaporator; a condenser for condensing the
refrigerant that has passed through the compressor; a capillary
tube for expanding the refrigerant that has passed through the
condenser; a desiccant rotor for dehumidifying and heating the
external air cooled by the evaporator; a heated air supply line for
supplying the external air, which is introduced through a second
external air receiving line connected to the condenser, to the
desiccant rotor after the external air is heated by condensation
heat of the condenser; a regeneration air exhaust line which
exhausts regeneration air having high-temperature and high-humidity
by receiving the regeneration air from the desiccant rotor; an air
feeding line for feeding processed air, which is dehumidified and
heated while passing through the desiccant rotor, to a
dehumidifying space such that the dehumidifying space keeps
predetermined internal temperature and internal humidity; and a
controller selectively cooling, dehumidifying or heating the
external air according to external temperature and humidity
conditions.
[0016] A filter is installed at an inlet side of the evaporator and
an eliminator is installed at an outlet side of the evaporator so
that condensing water contained in the external air can be easily
removed without being scattered.
[0017] A first bypass is further provided to connect the outlet
side of the evaporator to the regeneration air exhaust line, and a
second bypass is further provided to connect the heated air supply
line to the air feeding line.
[0018] According to another aspect, there is provided a method of
controlling the hybrid desiccant dehumidifying apparatus including
a first external air receiving line into which external air is
introduced, an evaporator installed in the first external air
receiving line to cool the external air through a heat exchange
reaction, a compressor for compressing a refrigerant that has
passed through the evaporator, a condenser for condensing the
refrigerant that has passed through the compressor, a capillary
tube for expanding the refrigerant that has passed through the
condenser, a desiccant rotor for dehumidifying and heating the
external air cooled by the evaporator, a heated air supply line for
supplying the external air, which is introduced through a second
external air receiving line connected to the condenser, to the
desiccant rotor after the external air is heated by condensation
heat of the condenser, a regeneration air exhaust line which
exhausts regeneration air by receiving the regeneration air from
the desiccant rotor, an air feeding line for feeding processed air,
which is dehumidified and heated while passing through the
desiccant rotor, to a dehumidifying space such that the
dehumidifying space keeps predetermined internal temperature and
internal humidity, and a controller.
[0019] The controller selectively cools, dehumidifies, heats or
blows the external air according to external temperature and
humidity conditions to generate the processed air which is supplied
to the dehumidifying space such that the temperature and the
humidity in the dehumidifying space can be maintained in a target
level.
[0020] As mentioned above, the present invention can provide the
hybrid desiccant dehumidifying apparatus and the control method
thereof which can be employed under poor environment, such as a
ship painting field or a working field where dangerous materials
are treated and circuited air cannot be reused, in which external
air can be pre-cooled by the evaporator or dehumidified and heated
by condensation heat of the condenser. Thus, even if the circulated
air cannot be reused, the condensation heat of the condenser can be
used as the heat source of the desiccant dehumidifying apparatus so
that energy consumption can be reduced and the temperature and the
humidity can be properly maintained.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] FIG. 1 is a schematic view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the present
invention;
[0022] FIG. 2 is a schematic view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the first embodiment
of the present invention;
[0023] FIG. 3 is a block view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the first embodiment
of the present invention;
[0024] FIG. 4 is a schematic view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the second
embodiment of the present invention;
[0025] FIG. 5 is a block view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the second
embodiment of the present invention;
[0026] FIG. 6 is a schematic view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the third embodiment
of the present invention;
[0027] FIG. 7 is a block view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the third embodiment
of the present invention;
[0028] FIG. 8 is a schematic view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the fourth
embodiment of the present invention; and
[0029] FIG. 9 is a block view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the fourth
embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0030] Hereinafter, exemplary embodiments of the present invention
will be described in detail with reference to accompanying
drawings.
[0031] In the following description and drawings, O.A refers to
external air, E.A refers to exhaust air and S.A refers to supply
air. In addition, thick lines represent the fluid flow and thin
lines represent no fluid flow.
[0032] First, the structure of the hybrid desiccant dehumidifying
apparatus according to the present invention will be described.
[0033] FIG. 1 is a schematic view showing the structure of the
hybrid desiccant dehumidifying apparatus according to the present
invention.
[0034] As shown in FIG. 1, the hybrid desiccant dehumidifying
apparatus according to the present invention includes a first
external air receiving line 1 into which external air is
introduced, an evaporator V installed in the first external air
receiving line 1 to cool the external air through a heat exchange
reaction, a compressor P for compressing a refrigerant that has
passed through the evaporator V, a condenser C for condensing the
refrigerant that has passed through the compressor, a capillary
tube E for expanding the refrigerant that has passed through the
condenser, a desiccant rotor R for dehumidifying and heating the
external air cooled by the evaporator, a heated air supply line L1
for supplying the external air, which is introduced through a
second external air receiving line 2 connected to the condenser C,
to the desiccant rotor R after the external air is heated by
condensation heat of the condenser C, a regeneration air exhaust
line L3 which exhausts regeneration air having high-temperature and
high-humidity by receiving the regeneration air from the desiccant
rotor R, an air feeding line L2 for feeding processed air, which is
dehumidified and heated while passing through the desiccant rotor
R, to a dehumidifying space T such that the dehumidifying space T
keeps predetermined internal temperature and internal humidity, and
a controller selectively cooling, dehumidifying or heating the
external air according to external temperature and humidity
conditions to supply dried air to the dehumidifying space such that
the dehumidifying space can be maintained with the target
temperature and humidity.
[0035] The first external air receiving line 1 is a duct that
receives the external air from the outside and transfers the
external air to the evaporator V.
[0036] A filter F is installed at an inlet side of the evaporator V
and an eliminator G is installed at an outlet side of the
evaporator V so that condensing water contained in the external air
can be easily removed without being scattered.
[0037] A first bypass BP1 is provided to connect the first external
air receiving line 1 adjacent to the outlet side of the evaporator
V to the regeneration air exhaust line L3. The regeneration air
exhausted from the desiccant rotor R is transferred to the
regeneration air exhaust line L3. A damper CV is installed in the
first bypass BP1.
[0038] Thus, the fluid flows only from the first external air
receiving line 1 to the regeneration air exhaust line L3 by the
damper CV.
[0039] In addition, a second bypass BP2 is provided to connect the
heated air supply line L1 to the air feeding line L2, which will be
described later in more detail.
[0040] The evaporator V is installed in the first external air
receiving line 1 to cool the external air through the heat exchange
reaction.
[0041] That is, the evaporator V includes a cooling coil for
circulating the refrigerant. The refrigerant is evaporated while
passing through the cooling coil by absorbing heat from the ambient
air so that cooled air can be exhausted to the interior of the
room.
[0042] The refrigerant that has passed through the evaporator V is
compressed by the compressor P. In addition, the refrigerant that
has passed through the compressor P is condensed by the condenser C
and the refrigerant that has passed through the condenser C is
expanded by the capillary tube E.
[0043] The desiccant rotor R is generally known in the art, so that
detailed description thereof will be omitted.
[0044] For reference, a conventional desiccant dehumidifier is
disclosed in Korean Registered Utility Model Publication No.
0323078.
[0045] The desiccant rotor R is divided into a processing unit and
a regeneration unit. An area ratio between the processing unit and
a regeneration unit is set to 1:1 to 5:3 according to the size of
the apparatus.
[0046] The processing unit includes an absorbent agent, such as
silica gel, so that humidity contained in the air passing through
the desiccant rotor R is absorbed in the absorbent agent. The
heated external air passes through the regeneration unit so that
the heated external air is converted into the regeneration air
through the heat exchange reaction.
[0047] The regeneration air generated from the desiccant rotor R is
exhausted to the outside through the regeneration air exhaust line
L3.
[0048] Meanwhile, the second bypass BP2 is installed between the
heated air supply line L1 and the air feeding line L2.
[0049] The external air heated by the condenser C can be supplied
to the air feeding line L2 through the second bypass BP2 without
being supplied to the desiccant rotor R. Thus, in the winter
season, in which the external air has low temperature and low
humidity, the external air heated by the condenser C is supplied to
the dehumidifying space T through the air feeding line L2 without
driving the desiccant rotor R.
[0050] In addition, the heater H is installed in the heated air
supply line, so that the external air heated while passing through
the condenser C can be further heated by the heater H.
[0051] Hereinafter, the control method for the hybrid desiccant
dehumidifying apparatus according to the present invention will be
described.
[0052] According to the present invention, the controller
selectively cools, dehumidifies, heats or blows the external air
according to external temperature and humidity conditions to
generate the processed air which is supplied to the dehumidifying
space such that the temperature and the humidity in the
dehumidifying space can be maintained in a target level.
[0053] The present invention provides four basic control modes
according to external climate conditions.
[0054] In detail, in the summer season, the dehumidifying apparatus
is operated in the cooling-dehumidifying mode under the high
temperature-high humidity condition and the intermediate
temperature-high humidity condition, and operated in the cooling
mode under the high temperature-intermediate humidity
condition.
[0055] In the spring and autumn seasons, the dehumidifying
apparatus is operated in the blowing mode if the cooling operation
can be naturally achieved by the external air.
[0056] In the winter season, the dehumidifying apparatus is
operated in the heating mode.
[0057] Especially, the summer season is classified into the dry
season and the rainy season. The dehumidifying apparatus is
operated in the cooling mode in the dry season, and operated in the
cooling-dehumidifying mode in the rainy season.
[0058] FIG. 2 is a schematic view showing the structure of the
hybrid desiccant dehumidifying apparatus according to the first
embodiment of the present invention, and FIG. 3 is a block view
showing the structure of the hybrid desiccant dehumidifying
apparatus according to the first embodiment of the present
invention.
[0059] As shown in FIGS. 2 and 3, the dehumidifying apparatus is
operated in the cooling-dehumidifying mode in the severe hot season
or the rainy season.
[0060] The external air may have the high temperature and high
humidity in the severe hot season, and the external air may have
low temperature and high humidity in the rainy season.
[0061] In this case, in order to properly keep the temperature and
humidity in the dehumidifying space T, the cooling-dehumidifying
mode is performed by operating the compressor P, the condenser C,
the evaporator V and the capillary tube E to cool the external air
introduced through the first external air receiving line 1;
supplying the external air, which is heated by condensation heat of
the condenser C, to the desiccant rotor R through the heated air
supply line L1; and supplying the processed air, which is obtained
by heat-exchanging the regeneration air with the external air
supplied through the first external air receiving line 1 in the
desiccant rotor R, to the dehumidifying space T through the air
feeding line L2.
[0062] The external air heated by the condensation heat of the
condenser C may have the temperature of about 60 to 80.degree.
C.
[0063] Since the heater H is installed in the heated air supply
line L1, the external air heated by the condensation heat of the
condenser C can be further heated by the heater H so that the
external air may have the higher temperature.
[0064] Therefore, the heated external air can be used as the
regeneration air source of the desiccant rotor R.
[0065] FIG. 4 is a schematic view showing the structure of the
hybrid desiccant dehumidifying apparatus according to the second
embodiment of the present invention, and FIG. 5 is a block view
showing the structure of the hybrid desiccant dehumidifying
apparatus according to the second embodiment of the present
invention.
[0066] As shown in FIGS. 4 and 5, in the summer season in which the
external air has the high temperature and high humidity, in order
to properly keep the temperature and humidity in the dehumidifying
space T, the cooling mode and the cooling-dehumidifying mode are
simultaneously performed by operating the compressor P, the
condenser C, the evaporator V and the capillary tube E to cool and
dehumidify the external air introduced through the first external
air receiving line 1; supplying the external air, which is heated
by condensation heat of the condenser C, to the desiccant rotor R
through the heated air supply line L1; supplying the processed air,
which is dehumidified and heated by heat-exchanging the
regeneration air with the external air supplied through the first
external air receiving line 1 in the desiccant rotor R, to the
dehumidifying space through the air feeding line; supplying some of
the external air, which has been cooled and dehumidified, to the
air feeding line L2 through a third bypass BP4 to cool the external
air; and supplying the cooled external air to the dehumidifying
space T, thereby keeping the dehumidifying space T with the proper
temperature and humidity.
[0067] Thus, the external air cooled through the evaporator V is
supplied to the air feeding line L2 through the third bypass BP3,
so that the cooled external air can be mixed with the regeneration
air, which is dehumidified and heated while passing through the
desiccant rotor R.
[0068] In addition, if it is necessary to lower the temperature
regardless of the humidity, the operation of the desiccant rotor R
is stopped and the regeneration air is exhausted to the outside
through the regeneration air exhaust line.
[0069] FIG. 6 is a schematic view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the third embodiment
of the present invention, and FIG. 7 is a block view showing the
structure of the hybrid desiccant dehumidifying apparatus according
to the third embodiment of the present invention.
[0070] As shown in FIGS. 6 and 7, in the spring season and the
autumn season in which the external air has the low temperature and
low humidity so that the cooling operation is performed through
circulation of the external air without operating the cooler, in
order to properly keep the temperature and humidity in the
dehumidifying space T, the dehumidifying apparatus is operated by
stopping operation of the compressor P, the condenser C, the
evaporator V and the capillary tube E; and shutting off a
regeneration part of the desiccant rotor R using a damper and
opening the second bypass BP2 to allow the external air passing
through a coil of the condenser C to be supplied to the
dehumidifying space T through the air feeding line L2.
[0071] FIG. 8 is a schematic view showing the structure of a hybrid
desiccant dehumidifying apparatus according to the fourth
embodiment of the present invention and FIG. 9 is a block view
showing the structure of the hybrid desiccant dehumidifying
apparatus according to the fourth embodiment of the present
invention.
[0072] As shown in FIGS. 8 and 9, in the winter season in which the
external air has the low temperature and the low humidity, the
dehumidifying apparatus is operated by operating the compressor P,
the condenser C, the evaporator V and the capillary tube E to cool
the external air introduced through the first external air
receiving line 1; opening the first bypass BP1 to exhaust the
external air cooled by the evaporator V through the regeneration
air exhaust line L3; and shutting off a regeneration part of the
desiccant rotor R and opening the second bypass BP2 to supply the
external air heated by condensation heat of the condenser C to the
dehumidifying space T through air feeding line L2.
[0073] That is, the external air cooled by passing through the
evaporator V is exhausted to the outside through the regeneration
air exhaust line L3 without being supplied to the desiccant rotor
R.
[0074] The external air heated by the condensation heat of the
condenser C may have the temperature of about 30 to 40.degree. C.,
and this external air can be used as a heat source during the
heating operation.
[0075] Although the exemplary embodiments of the present invention
have been described, it is understood that the present invention
should not be limited to these exemplary embodiments but various
changes and modifications can be made by one ordinary skilled in
the art within the spirit and scope of the present invention as
hereinafter claimed.
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