U.S. patent application number 13/505428 was filed with the patent office on 2012-08-30 for total heat exchange-type ventilating apparatus, and method for controlling same.
Invention is credited to Ki Seong Lee.
Application Number | 20120216982 13/505428 |
Document ID | / |
Family ID | 43922753 |
Filed Date | 2012-08-30 |
United States Patent
Application |
20120216982 |
Kind Code |
A1 |
Lee; Ki Seong |
August 30, 2012 |
TOTAL HEAT EXCHANGE-TYPE VENTILATING APPARATUS, AND METHOD FOR
CONTROLLING SAME
Abstract
The present invention relates to a total heat exchange-type
ventilating apparatus and a method for controlling same, which
detects indoor and outdoor temperatures and humidities, calculates
indoor and outdoor enthalpies from the detected temperature and
humidity information, and selectively operates in a heat exchange
mode or in an outdoor air cooling mode through the result of
comparing the magnitudes of the enthalpies, thereby controlling the
indoor temperature and humidity to be maintained at comfortable
levels. To accomplish this, the apparatus of the present invention
comprises: a first exhaust chamber (30) and a second exhaust
chamber (40); a first air supply chamber (10) and a second air
supply chamber (20); a total heat exchanger (50) for exchanging
heat between indoor air introduced from the first exhaust chamber
(30) to the second exhaust chamber (40) and outdoor air introduced
from the first air supply chamber (10) to the second air supply
chamber (20); a bypass pipe (60) which forms an airflow channel for
enabling outdoor air to be directly introduced into an indoor area
without passing through the total heat exchanger (50) during a free
cooling operation; a first temperature sensor (31) and a first
humidity sensor (33) for sensing the temperature and humidity of
the indoor air; a second temperature sensor (11) and a second
humidity sensor (13) for sensing the temperature and humidity of
the outdoor air; and a control unit (70) which calculates the
enthalpies of the indoor air and outdoor air on the basis of the
temperatures and humidities of the indoor air and outdoor air,
compares the sizes of the enthalpies, and controls an outdoor air
inflow path.
Inventors: |
Lee; Ki Seong; (Gyeonggi-do,
KR) |
Family ID: |
43922753 |
Appl. No.: |
13/505428 |
Filed: |
October 7, 2010 |
PCT Filed: |
October 7, 2010 |
PCT NO: |
PCT/KR2010/006841 |
371 Date: |
May 1, 2012 |
Current U.S.
Class: |
165/11.1 |
Current CPC
Class: |
Y02B 30/54 20130101;
F24F 2011/0006 20130101; F24F 12/006 20130101; F24F 2110/12
20180101; Y02B 30/56 20130101; F24F 2110/00 20180101; F24F 2110/22
20180101; F24F 11/30 20180101; F24F 2110/20 20180101; F24F 2012/007
20130101 |
Class at
Publication: |
165/11.1 |
International
Class: |
F28F 27/00 20060101
F28F027/00 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 2, 2009 |
KR |
1020090104767 |
Claims
1. A total heat exchange type ventilating apparatus, comprising: a
first air exhaust chamber (30) into which indoor air is introduced
through an indoor air suction opening (32); a second air exhaust
chamber (40) from which the indoor air that is passed through the
first air exhaust chamber (30) is exhausted to the outdoor area
through an indoor air exhaust opening (42); a first air supply
chamber (10) into which outdoor air is introduced through an
outdoor air suction opening (12); a second air supply chamber (20)
from which the outdoor air that is passed through the first air
supply chamber (10) is exhausted through an outdoor air exhaust
opening (22); a total heat exchanger (50) exchanging heat between
the indoor air introduced from the first air exhaust chamber (30)
to the second air exhaust chamber (40) and the outdoor air
introduced from the first air supply chamber (10) to the second air
supply chamber (20); a bypass pipe (60) connected between the
outdoor air suction opening (12) and the outdoor air exhaust
opening (22) to form an air passage so that the outdoor air can be
directly introduced into the indoor area without passing through
the total heat exchanger (50) during free cooling; a first
temperature sensor (31) for detecting a temperature of the indoor
air and a first humidity sensor (33) for detecting a humidity of
the indoor air; and a second temperature sensor (11) for detecting
a temperature of the outdoor air and a second humidity sensor (13)
for detecting a humidity of the outdoor air; and a control unit
(70) for calculating enthalpies of the indoor air and the outdoor
air from the temperatures and humidities of the indoor air and the
outdoor air, and comparing the magnitudes of the enthalpies of the
indoor air and the outdoor air to control an intake path of the
outdoor air to be selected from a heat exchange mode or a free
cooling mode.
2. The total heat exchange type ventilating apparatus of claim 1,
wherein the first temperature sensor (31) and the first humidity
sensor (33) are installed in an air passage of the indoor air
suction opening (32), and the second temperature sensor (11) and
the second humidity sensor (13) are installed in an air passage of
the outdoor air suction opening (12).
3. A method of controlling a total heat exchange type ventilating
apparatus, comprising: (1) detecting temperatures and humidities of
indoor air and outdoor air; (2) calculating enthalpies of the
indoor air and the outdoor air from the temperatures and humidities
of the indoor air and the outdoor air; (3) comparing the magnitudes
of the enthalpy of the indoor air and the enthalpy of the outdoor
air; and (4) controlling such that in the result of comparing the
magnitudes of the enthalpies, when the enthalpy of the indoor air
is higher than the enthalpy of the outdoor air, free cooling where
the outdoor air is directly introduced into an indoor area via a
bypass filter (60) is performed, and when the enthalpy of the
indoor air is lower than the enthalpy of the outdoor air, the
outdoor air is heat-exchanged through the total heat exchanger (50)
and is introduced into the indoor area.
4. The method of claim 3, further comprising: determining whether a
dew condensation condition during winter is satisfied, between step
(2) and step (3), wherein if the dew condensation condition is
satisfied, the outdoor air is blocked from being introduced into
the indoor area and the indoor air is allowed to be exhausted to
the outdoor area.
5. The method of claim 4, wherein if the dew condensation condition
is not satisfied in determining whether the dew condensation
condition during winter is satisfied, the method further comprises:
(A) determining whether it is summer; (B) determining whether the
indoor area requires cooling; and (C) determining whether the
indoor temperature is higher than the outdoor temperature, and if
all the conditions are satisfied in steps (A) to (C), free cooling
is performed, and if any one of the conditions is not satisfied in
steps (A) to (C), the outdoor air is introduced into the indoor
area after exchanging heat.
Description
TECHNICAL FIELD
[0001] The present invention relates to a total heat exchange type
ventilating apparatus and a method of controlling the same, and
more particularly, to a total heat exchange type ventilating
apparatus which detects temperatures and humidities of indoor and
outdoor areas, calculates enthalpies of the indoor and outdoor
areas from detected temperature and humidity information, and
selectively operates in a heat exchange mode or an outside air
cooling mode through the result of comparing of the magnitudes of
the enthalpies, making it possible to control the indoor
temperature and humidity to be maintained at a comfortable level,
and a method of controlling the same.
BACKGROUND ART
[0002] Cooling or heating apparatus is installed in a house or an
office to cool or heat indoor areas as seasons change, and the
cooling or heating apparatus includes an air conditioner, a boiler,
and the like to cool or heat the indoor air.
[0003] A house or an office in where such cooling or heating
apparatus is installed is maintained in a sealed state to enhance
cooling or heating efficiency, however, the air in the sealed area
becomes contaminated over time, causing stale air to be generated
in the indoor area and foreign substances such as dust to remain in
the air. Accordingly, the indoor air is ventilated to remove such
stale air and dust from the indoor area, and a ventilating
apparatus is used to exhaust contaminated indoor air to outdoor
area more promptly and to supply fresh outdoor air into indoor area
while maintaining indoor temperature.
[0004] FIG. 1 is a view of a total heat exchange type ventilating
apparatus according to the conventional art.
[0005] The total heat exchange type ventilating apparatus 1
according to the conventional art comprises a first air supply
chamber 10 into which outdoor air is introduced through an outdoor
air suction opening 12, a second air supply chamber 20 into which
the outdoor air introduced into the first air supply chamber 10 is
introduced via a total heat exchanger after being purified by
passing through a filter 55 to be supplied into an indoor area
through the outdoor air exhaust opening 22, a first air exhaust
chamber 30 into which indoor air is suctioned through an indoor air
suction opening 32, and a second air exhaust chamber 40 from which
the indoor air introduced into the first air exhaust chamber 30 is
discharged to the outdoor area through the indoor air exhaust
opening 42 via the total heat exchanger 50.
[0006] An air supplying blower 25 for compulsorily suctioning the
outdoor air supplied in a direction to the outdoor air exhaust
opening 22 is installed within the second air supply chamber 20,
and an air exhausting blower 45 for compulsorily suctioning the
indoor air exhausted in a direction to the indoor air exhaust
opening 42 is installed within the second air exhaust chamber 40. A
bypass pipe 60 forming an air passage is connected between the
outdoor air suction opening 12 and the outdoor air exhaust opening
22 such that the outdoor air whose temperature is lower than the
indoor air does not pass through the total heat exchanger 50 but is
directly introduced into the indoor area during free cooling. A
filter 62 for purifying the introduced outdoor air is installed in
the passage of the bypass filter 60, and the bypass pipe 60 is
connected to the air supplying blower 25.
[0007] Meanwhile, a first temperature sensor 31 for detecting a
temperature of the indoor air is installed in the indoor air
suction opening 32, and a second temperature sensor 11 for
detecting a temperature of the outdoor air is installed in the
outdoor air suction opening 12.
[0008] The above-described total heat exchange type ventilating
apparatus 1 according to the conventional art supplies heat and
moisture into the indoor area by using the total heat exchanger 50
to exchange sensible heat and latent heat.
[0009] The total heat exchange type ventilating apparatus 1 is more
efficient in saving energy during winter and summer than during
spring and fall.
[0010] However, in summer, the temperature of the outdoor area is
lower than the temperature of the indoor area. And, the temperature
of the indoor air can become higher than the temperature of the
outdoor air when the heat is exchanged and this makes the people in
the indoor area feel uncomfortable.
[0011] Thus, when the temperature of the outdoor air is lower than
the temperature of the indoor air, the outdoor air can be directly
introduced into the indoor area through the bypass pipe 60 without
passing through the total heat exchanger 50 so that the indoor
temperature can be lowered by a predetermined level by performing
free cooling.
[0012] However, during the rainy season, the temperature of the
outdoor air is lower than the temperature of the indoor area but
the outdoor humidity is far higher than indoor humidity, so when
free cooling is performed, humid air is introduced into the indoor
area and this makes people in the indoor area feel
uncomfortable.
[0013] Since the total heat exchange type ventilating apparatus 1
according to the conventional art compares a temperature of an
indoor area detected by the first temperature sensor 31 and a
temperature of an outdoor area detected by the second temperature
sensor 11 and performs free cooling without exchanging heat when
the temperature of the outdoor area is lower than the temperature
of the indoor area, outdoor moisture may be directly introduced
into the indoor area when the outdoor area is cool but humid during
the rainy season and this makes the indoor area humid and damp.
DISCLOSURE
Technical Problem
[0014] The present invention has been made in an effort to provide
a total heat exchange type ventilating apparatus which considers
the humidities of indoor and outdoor areas in addition to the
temperatures of the indoor and outdoor areas, and controls outdoor
air introduced into the indoor area to be selectively operated in a
heat exchange mode or a free cooling mode, making it possible to
regulate an indoor air condition to be more comfortable, and a
method of controlling the same.
Technical Solution
[0015] An exemplary embodiment of the present invention provides a
total heat exchange type ventilating apparatus, comprising: a first
air exhaust chamber 30 into which indoor air is introduced through
an indoor air suction opening 32; a second air exhaust chamber 40
from which the indoor air that is passed through the first air
exhaust chamber 30 is exhausted to the outdoor area through an
indoor air exhaust opening 42; a first air supply chamber 10 into
which outdoor air is introduced through an outdoor air suction
opening 12; a second air supply chamber 20 from which the outdoor
air that is passed through the first air supply chamber 10 is
exhausted through an outdoor air exhaust opening 22; a total heat
exchanger 50 exchanging heat between the indoor air introduced from
the first air exhaust chamber 30 to the second air exhaust chamber
40 and the outdoor air introduced from the first air supply chamber
10 to the second air supply chamber 20; a bypass pipe 60 connected
between the outdoor air suction opening 12 and the outdoor air
exhaust opening 22 to form an air passage so that the outdoor air
can be directly introduced into the indoor area without passing
through the total heat exchanger 50 during free cooling; a first
temperature sensor 31 for detecting a temperature of the indoor air
and a first humidity sensor 33 for detecting a humidity of the
indoor air; a second temperature sensor 11 for detecting a
temperature of the outdoor air and a second humidity sensor 13 for
detecting a humidity of the outdoor air; and a control unit 70 for
calculating enthalpies of the indoor air and the outdoor air from
the temperatures and humidity of the indoor air and the outdoor
air, and comparing the magnitudes of the indoor and outdoor
enthalpies to control an intake path of the outdoor air to be
selected from a heat exchange mode or a free cooling mode.
[0016] The first temperature sensor 31 and the first humidity
sensor 33 may be installed in an air passage of the indoor air
suction opening 32, and the second temperature sensor 11 and the
second humidity sensor 13 may be installed in an air passage of the
outdoor air suction opening 12.
[0017] Another exemplary embodiment of the present invention
provides a method of controlling a total heat exchange type
ventilating apparatus, comprising: (1) detecting temperatures and
humidities of indoor air and outdoor air; (2) calculating
enthalpies of the indoor air and the outdoor air from the
temperatures and humidities of the indoor air and the outdoor air;
(3) comparing the magnitudes of the enthalpy of the indoor air and
the enthalpy of the outdoor air; and (4) controlling such that in
the result of comparing the magnitudes of the enthalpies, when the
enthalpy of the indoor air is higher than the enthalpy of the
outdoor air, free cooling where the outdoor air is directly
introduced into an indoor area via a bypass filter 60 is performed,
and when the enthalpy of the indoor air is higher than the enthalpy
of the outdoor air, the outdoor air is heat-exchanged via a total
heat exchanger 50 and is introduced into the indoor area.
[0018] The method may further comprise: determining whether a dew
condensation condition of winter is satisfied, between step (2) and
step (3). If the dew condensation condition is satisfied, the
outdoor air is blocked from being introduced into the indoor area
and the indoor air is allowed to be exhausted to the outdoor
area.
[0019] If the dew condensation condition is not satisfied in
determining whether the dew condensation condition of winter is
satisfied, the method may further comprises: (A) determining
whether it is summer; (B) determining whether the indoor area
requires cooling; and (C) determining whether the indoor
temperature is higher than the outdoor temperature. If all the
conditions are satisfied in steps (A) to (C), free cooling may be
performed, and if any one of the conditions is not satisfied in
steps (A) to (C), the outdoor air may be introduced into the indoor
area after exchanging heat.
Advantageous Effects
[0020] The total heat exchange type ventilating apparatus and a
method of controlling the same can calculate enthalpies from
temperature and humidity conditions of indoor and outdoor areas,
and controls outdoor air introduced into the indoor area by
selectively operating in a heat exchange mode or a free cooling
mode according to the result of comparing the enthalpies, making it
possible to provide a more comfortable ventilation state to people
in the indoor area.
DESCRIPTION OF DRAWINGS
[0021] FIG. 1 is a view of a total heat exchange type ventilating
apparatus according to the conventional art.
[0022] FIG. 2 is a view of a total heat exchange type ventilating
apparatus according to the present invention.
[0023] FIG. 3 is a control block diagram of the total heat exchange
type ventilating apparatus according to the present invention.
[0024] FIG. 4 is a flowchart showing a method of controlling a
total heat exchange type ventilating apparatus according to the
present invention.
EXPLANATION OF MAIN REFERENCE NUMERALS AND SYMBOLS
[0025] 1,100: Total heat exchange type ventilating apparatus
[0026] 10: First air supply chamber
[0027] 11: Second temperature sensor
[0028] 12: Outdoor air suction opening
[0029] 13: Second humidity sensor
[0030] 20: Second air supply chamber
[0031] 22: Outdoor air exhaust opening
[0032] 25: Air supplying blower
[0033] 30: First air exhaust chamber
[0034] 31: First temperature sensor
[0035] 32: Indoor air suction opening
[0036] 33: First humidity sensor
[0037] 40: Second air exhaust chamber
[0038] 42: Indoor air exhaust opening
[0039] 45: Air exhausting blower
[0040] 50: Total heat exchanger
[0041] 55, 62: Filter
[0042] 60: Bypass filter
[0043] 70: Control unit
[0044] 80: Mode selecting unit
[0045] 81: Heat exchange mode
[0046] 82: Free cooling mode
BEST MODE
[0047] Hereinafter, configurations and operations of exemplary
embodiments of the present invention will be described in detail
with reference to the accompanying drawings. Here, the same
reference numerals are assigned to the same elements of the
conventional art, and a detailed description of the repeated
elements will be omitted.
[0048] FIG. 2 is a view of a total heat exchange type ventilating
apparatus according to the present invention. FIG. 3 is a control
block diagram of the total heat exchange type ventilating apparatus
according to the present invention. FIG. 4 is a flowchart showing a
method of controlling a total heat exchange type ventilating
apparatus according to the present invention.
[0049] Referring to FIG. 2, the total heat exchange type
ventilating apparatus 100 according to the present invention
comprises the same elements as in the total heat exchange type
ventilating apparatus 1 according to the conventional art, that is,
a first air exhaust chamber 30 and a second air exhaust chamber 40,
a first air supply chamber 10 and a second air supply chamber 20, a
total heat exchanger 50, and a bypass pipe 60, and may also
comprise the same elements such as an indoor air suction opening 32
and an indoor air exhaust opening 42, an outdoor air suction
opening 12 and an outdoor air exhaust opening 22, and an air
exhaust blower 45 and an air supply blower 25.
[0050] However, the total heat exchange type ventilating apparatus
1 according to the conventional art only compares indoor and
outdoor temperatures with each other to selectively control an air
passage of outdoor air introduced into an indoor area from a heat
exchanging mode or a free cooling mode, whereas the total heat
exchange type ventilating apparatus 100 according to the present
invention comprises a first temperature sensor 31 for detecting a
temperature of indoor air and a first humidity sensor 33 for
detecting a humidity of indoor air, a second temperature sensor 11
for detecting a temperature of outdoor air and a second humidity
sensor 13 for detecting a humidity of outdoor air, and a control
unit 70 for calculating enthalpies of indoor air and outdoor air
from the temperatures and humidities of the indoor air and outdoor
air and comparing the magnitudes of the calculated enthalpies of
the indoor air and outdoor air to selectively control an
introduction path of the outdoor air by selecting a heat exchange
mode or a free cooling mode.
[0051] Here, it is preferable that the first temperature sensor 31
and the first humidity sensor 33 are installed in an air passage of
the indoor air suction opening 32 which is located at the closest
position to the indoor area among the elements of the total heat
exchange type ventilating apparatus 100 to detect a temperature T1
and humidity H1 of the indoor air, and the second temperature
sensor 11 and the second humidity sensor 13 are installed in an air
passage of the outdoor air suction opening 12 which is located at
the closest position to the outdoor area among the elements of the
total heat exchange type ventilating apparatus 100 to detect a
temperature T2 and humidity H2 of the outdoor air.
[0052] However, the locations where the first temperature sensor 31
and the first humidity sensor 33, and the second temperature sensor
11 and the second temperature sensor 13 are installed are not
limited to the air passages of the indoor air suction opening 32
and the outdoor air suction opening 12, in which case the first
temperature sensor 31 and the first humidity sensor 33 may be
installed in a room controller mounted in the indoor area or an air
passage of a duct and the second temperature sensor 11 and the
second humidity sensor 13 may be installed in a hood through which
outdoor air is introduced from the outside.
[0053] In this way, the present invention detects both indoor and
outdoor temperatures and humidities and calculates an indoor
enthalpy h1 and an outdoor enthalpy h2 on which both the indoor and
outdoor temperatures and humidities are reflected,
respectively.
[0054] Here, since a state of a simple compressive system can be
represented by two independent intensive properties, an enthalpy h
can be calculated as an example by using a known psychrometric
chart while a temperature T and a humidity H are taken as basic
parameters in the present exemplary embodiment.
[0055] Referring to FIGS. 2 and 3, the control arrangement of the
total heat exchange type ventilating apparatus 100 according to the
present invention comprises a first temperature sensor 31 for
detecting a temperature T1 of indoor air and a first humidity
sensor 33 for detecting a humidity H1 of indoor air introduced
through an indoor air suction opening 32, a second temperature
sensor 11 for detecting a temperature T2 of outdoor air and a
second humidity sensor 13 for detecting a humidity H2 of outdoor
air introduced through an outdoor air suction opening 12, a mode
selecting unit 80 having a heat exchange mode 81 in which the
outdoor air introduced through the outdoor air suction opening 12
exchanges heat with a total heat exchanger 50 and is introduced
into an indoor area through the outdoor air exhaust opening 22 and
a free cooling mode 82 in which the outdoor air introduced through
the outdoor air suction opening 12 is directly introduced through
the outdoor air exhaust opening 22 through a bypass pipe 60 without
passing through the total heat exchanger 50, and a control unit 70
for calculating an enthalpy h1 of indoor air and an enthalpy h2 of
outdoor air from information of the temperature T1 of the indoor
air detected by the first temperature sensor 31 and humidity H1 of
the indoor air detected by the first humidity sensor 33 and from
information of the temperature T2 of the outdoor air detected by
the second temperature sensor 11 and humidity H2 of the outdoor air
detected by the second humidity sensor 13.
[0056] The control unit 70 compares the magnitudes of the enthalpy
h1 of the indoor air and the enthalpy h2 of the outdoor air, which
have been calculated, with each other to control the free cooling
mode 82 to be operated when the enthalpy h1 of the indoor air is
larger than the enthalpy h2 of the outdoor air and to control the
heat exchange mode 81 to be operated when the enthalpy h2 of the
outdoor air is larger than the enthalpy h1 of the indoor air.
[0057] Meanwhile, the control unit 70 includes a configuration for
controlling an operation of the total heat exchange type
ventilating apparatus 100, considering indoor and outdoor
conditions in addition to comparing the magnitudes of the
enthalpies of the indoor and outdoor areas.
[0058] A method of controlling the total heat exchange type
ventilating apparatus 100 according to the present invention will
be described with reference to FIG. 4.
[0059] First, a temperature T1 and humidity H1 of an indoor area
are detected by a first temperature sensor 31 and a temperature T2
and humidity H2 of an outdoor area are detected by a first
temperature sensor 31 and a first humidity sensor 33, and a second
temperature sensor 11 and a second humidity sensor 13 (S1, step
1).
[0060] An enthalpy h1 of the indoor area is calculated from
information regarding the temperature T1 and humidity H1 of the
indoor area and an enthalpy h2 of the outdoor area is calculated
from information regarding the temperature T2 and humidity H2 of
the outdoor area, by using a known psychrometric chart (S2, step
2).
[0061] Next, it is determined whether a dew condensation condition
in winter is satisfied (S3), and in the present exemplary
embodiment, if the temperature T2 of the outdoor air is lower than
5.degree. C., it is considered that a dew condensation condition is
satisfied. In a state where a dew condensation condition is
satisfied, outdoor air at low temperature is prevented from being
introduced into an indoor area by blocking an outdoor air exhaust
opening 22 and opening an indoor air exhaust opening 42 (S4).
[0062] Here, if the dew condensation condition is not satisfied, it
is determined in the next step whether it is summer (S5, step A),
and in the present exemplary embodiment, when the temperature T2 of
the outdoor air exceeds 20.degree. C., it is considered that the
condition is satisfied and the step proceeds to the next step.
However, when the temperature T2 of the outdoor air is less than
20.degree. C., a heat exchange mode S6 is implemented.
[0063] Next, it is determined whether the indoor area requires to
be cooled (S7, step B), and in the present exemplary embodiment,
when the temperature T1 of the indoor air exceeds 22.degree. C., it
is considered that the condition is satisfied and the step proceeds
to the next step. However, when the temperature T1 of the indoor
area is less than 22.degree. C., the heat exchange mode S6 is
implemented.
[0064] In the next step, it is determined whether the temperature
T1 of the indoor air is higher than the temperature T2 of the
outdoor air (S8, step C), and when the temperature T1 of the indoor
air is higher than the temperature T2 of the outdoor air, it is
considered that the condition is satisfied and the step proceeds to
the next step. However, when the temperature T1 of the indoor air
is lower than the temperature T2 of the outdoor air, the heat
exchange mode S6 is implemented.
[0065] Next, it is determined whether the enthalpy h1 of the indoor
air is higher than the enthalpy h2 of the outdoor air (S9, step 3),
and when the enthalpy h1 of the indoor air is higher than the
enthalpy h2 of the outdoor air, the free cooling mode is controlled
to be operated (S10), and when the enthalpy h1 of the indoor air is
lower than the enthalpy h2 of the outdoor air, the heat exchange
mode S6 is implemented.
[0066] In addition, the control steps are continuously repeated in
sequence during the operation of the total heat exchange type
ventilating apparatus 100.
[0067] As mentioned above, the present invention detects the
temperatures and humidity of indoor and outdoor areas to calculate
enthalpies, and compares the magnitudes of the enthalpies to
selectively control the mode of the air passage through which
outdoor air is introduced into an indoor area from a heat exchange
mode or a free cooling mode, making it possible to ventilate air
optimally by considering the temperatures and humidities of the
indoor and outdoor areas. Further, in addition to comparing the
magnitudes of the enthalpies, it is also determined whether a dew
condensation condition of winter is satisfied, whether it is
summer, whether the indoor area requires cooling, and whether the
temperature of the indoor area is higher than the temperature of
the outdoor area, making it possible to regulate the temperature
and humidity of the indoor air to provide an optimum ventilation
state.
[0068] It will be easily understood by those skilled in the art to
which the present invention pertains that the present invention is
not limited to the exemplary embodiments and may be variously
modified without departing from the scope of the present
invention.
* * * * *