FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. VEHICULAR AIR CONDITIONING SYSTEM
2.
1. (A) HANON SYSTEMS
(B) Republic of Korea
(C) (Sinil-dong)95, Sinilseo-ro Daedeok-gu Daejeon 34325 Republic of Korea
The following specification particularly describes the invention and the manner in which it is to be
performed.
2
Technical Field
The present invention relates to a vehicular air conditioning system, and
more particularly, a vehicular air conditioning system in which the installation
5 position of a photocatalyst module is improved to enable superoxide radicals
generated in the photocatalyst module to come into contact with a larger amount of
air, thereby enhancing the efficiency of removal of odors, bacteria and various
contaminants present in the air blown into the vehicle interior.
10 Background Art
A motor vehicle is equipped with an air conditioning system that controls the
temperature inside the vehicle. The air conditioning system sucks an air present
inside or outside the vehicle interior, heats or cools the sucked air to an optimum
temperature, and blows the heated or cooled air into the vehicle interior.
15 In particular, in winter, the air to be blown into the vehicle interior is heated
to keep the vehicle interior warm. In summer, the air to be blown into the vehicle
interior is cooled to keep the vehicle interior cold. In this way, air conditioning
system maintains the vehicle interior in a comfortable state at all times.
In such an air conditioning system, it is an important task to maintain not
20 only the air temperature in the vehicle interior but also the air quality in the vehicle
interior in an optimal state.
In particular, the air in the vehicle interior is easily polluted due to the narrow
and closed environment, and the fine dust and various contaminants introduced
from the outside. It has become an important task to maintain the air quality in the
25 vehicle interior in in an optimal state against such air pollution.
As a method for improving the air quality in a vehicle interior, there is
available a technique that makes use of a photocatalyst module.
In this technique, a photocatalyst module equipped with a light source part
3
and a catalyst part is installed on the internal flow path of an air conditioning system.
Visible light from the light source part induces a photocatalytic reaction in the
catalyst part. Superoxide radicals are generated through the photocatalytic
reaction in the catalyst part. The superoxide radicals thus generated remove odors,
5 bacteria and various contaminants in the air blown into the vehicle interior.
Since the photocatalyst module removes odors, bacteria and various
contaminants from the air blown into the vehicle interior, it is possible to increase the
cleanliness of the air blown into the vehicle interior, thereby improving the air quality
in the vehicle interior.
10 Such a photocatalyst module is preferably installed at an optimal position
among parts of the air conditioning system in order to effectively remove odors,
bacteria and various contaminants in the air blown into the vehicle interior.
Particularly, it is preferable to install the photocatalyst module at a portion
having the highest flow rate of air among the internal flow path portions of the air
15 conditioning system so that the air can come into contact with superoxide radicals
as much as possible.
In addition, for the convenience of repair, maintenance, and inspection, the
photocatalyst module is preferably installed at a position where it can be easily
detached from and attached to the air conditioning system.
20 In particular, various air conditioning parts and vehicle parts are installed in
and around the air conditioning case of the air conditioning system. For example, a
door actuator, a heater core pipe, an air conditioning duct, a dashboard, a blower
resistor, and the like are installed in and around the air conditioning case of the air
conditioning system. The photocatalyst module needs to be installed in the portion
25 of the air conditioning case without interference with these peripheral components,
so that it can be easily detached and attached during repair, maintenance, and
inspection.
4
Summary
In view of the problems inherent in the related art, it is an object of the
present invention to provide a vehicular air conditioning system in which the
installation position of a photocatalyst module is improved to enable superoxide
5 radicals generated in the photocatalyst module to come into contact with a larger
amount of air.
Another object of the present invention is to provide a vehicular air
conditioning system in which superoxide radicals generated in the photocatalyst
module are allowed to come into contact with a larger amount of air, thereby
10 enhancing the efficiency of removal of odors, bacteria and various contaminants
present in the air blown into the vehicle interior, increasing the cleanliness of the air
blown into the vehicle interior, and improving the air quality in the vehicle interior.
A further object of the present invention is to provide a vehicular air
conditioning system in which a photocatalyst module is installed at a portion of an air
15 conditioning case without interference with peripheral components so that the
photocatalyst module can be detached and attached with ease.
A still further object of the present invention is to provide a vehicular air
conditioning system in which a photocatalyst module is installed at a portion of an air
conditioning case without interference with peripheral components, thereby
20 improving the workability during repair, replacement, and inspection.
In order to achieve these objects, there is provided a vehicular air
conditioning system, including: a photocatalyst module configured to purify an air
blown into a vehicle interior along an internal flow path of an air conditioning case by
emitting superoxide radicals toward the internal flow path while generating a
25 photocatalytic reaction, wherein the photocatalyst module is installed on an outer
surface of the air conditioning case between a blower configured to suck an indoor
or outdoor air and blow the sucked air into the vehicle interior and a heat exchanger
configured to cool or heat an air to be blown into the vehicle interior.
5
In the system, the photocatalyst module may be installed in a blower case
portion of the air conditioning case between the blower and the heat exchanger.
In the system, the photocatalyst module may be installed on an outer surface
of a sidewall of the blower case portion on the vehicle interior side with respect to a
5 dashboard.
In the system, a blower resistor may be installed on the outer surface of the
side wall of the blower case portion to control a rotational speed of the blower, and
the photocatalyst module may be installed at the blower case portion above the
blower resistor in a direction of gravity.
10 In the system, the blower case portion may be composed of an upper case
and a lower case assembled with each other, the photocatalyst module may be
installed in the upper case of the blower case portion, and the blower resistor may
be installed in the lower case of the blower case portion.
In the system, the photocatalyst module may be assembled by being
15 inserted through a through-hole formed in the sidewall of the blower case portion,
and the system may further include: a fastening part configured to detachably fasten
the photocatalyst module assembled through the through-hole to the blower case
portion on the side of the vehicle interior.
In the system, the fastening part may include a pair of fastening bosses
20 formed on both sides of the through-hole to protrude from the blower case portion
toward the vehicle interior, a pair of fastening pieces formed on the photocatalyst
module to correspond to the fastening bosses, respectively, and a pair of fastening
screws configured to screw-fasten the fastening bosses and the fastening pieces
corresponding to each other so that the photocatalyst module is detachably
25 fastened to the blower case portion.
In the system, the photocatalyst module may be assembled with the blower
case portion to have a directivity in a specific direction.
In the system, the photocatalyst module further may include an erroneous
6
assembly prevention part configured to prevent the photocatalyst module from being
erroneously assembled in an incorrect direction when the photocatalyst module is
assembled through the through-hole.
In the system, the erroneous assembly prevention part may be a fastening
5 part that allows fastening of the photocatalyst module to the blower case portion
when correctly assembling the photocatalyst module through the through-hole in a
correct direction and prevents fastening of the photocatalyst module to the blower
case portion when erroneously assembling the photocatalyst module through the
through-hole in an incorrect direction.
10 In the system, the photocatalyst module may be correctly assembled
through the through-hole so that an electrical connector for introducing external
electricity faces the blower.
In the system, the erroneous assembly prevention part may be configured to
prevent the electrical connector from being erroneously assembled in a direction not
15 facing the blower when the photocatalyst module is assembled through the throughhole.
According to the vehicular air conditioning system according to the present
invention, the photocatalyst module is installed on the air flow path between the heat
exchanger and the blower. Therefore, the catalyst part of the photocatalyst module
20 can come into contact with a large amount of air discharged from the blower.
In addition, since the catalyst part of the photocatalyst module can come into
contact with a large amount of air discharged from the blower, the superoxide
radicals generated in the catalyst part are allowed to come into contact with as much
air as possible, thereby enhancing the efficiency of removal of odors, bacteria and
25 various contaminants present in the air blown into the vehicle interior, and
significantly increasing the cleanliness of the air blown into the vehicle interior.
In addition, since the photocatalyst module is installed in the air
conditioning case on the side of the vehicle interior without interference with
7
peripheral components, the photocatalyst module can be more easily and
conveniently detached from and attached to the air conditioning case.
In addition, since the photocatalyst module can be more easily and
conveniently detached from and attached to the air conditioning case, the
5 convenience of work can be improved during replacement, inspection, and
maintenance of the photocatalyst module.
In addition, if the photocatalyst module is erroneously assembled, it is
fundamentally impossible to fasten the photocatalyst module to the air conditioning
case and it is possible to visually confirm the erroneous assembly. Therefore, an
10 operator can easily recognize whether the photocatalyst module is erroneously
assembled.
In addition, since the operator can easily recognize whether or not the
photocatalyst module is erroneously assembled, it is possible to fundamentally
prevent erroneous assembly of the photocatalyst module. As a result, it is possible
15 to prevent mass production of defective products.
Brief Description of the Drawings
FIG. 1 is an exploded perspective view showing the configuration of a
vehicular air conditioning system according to the present invention.
20 FIG. 2 is a front view showing the configuration of the vehicular air
conditioning system according to the present invention.
FIG. 3 is a horizontal sectional view showing the configuration of the
vehicular air conditioning system according to the present invention.
FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, showing a state in
25 which a photocatalyst module constituting the vehicular air conditioning system of
the present invention is correctly attached to a blower case portion.
FIG. 5 is a view showing a state in which the photocatalyst module
constituting the vehicular air conditioning system of the present invention is
8
erroneously attached to the blower case portion.
Detailed Description
Preferred embodiments of a vehicular air conditioning system according to
5 the present invention will now be described in detail with reference to the
accompanying drawings.
Prior to describing the features of the vehicular air conditioning system
according to the present invention, the photocatalyst module 10 of the vehicular air
conditioning system will be briefly described with reference to FIGS. 1 to 3.
10 The photocatalyst module 10 includes a module case 12, a light source part
14 installed in the module case 12, and a catalyst part 16. The light source part 14
is built in the module case 12 and is operated by electricity applied to an electrical
connector 12a of the module case 12 to emit visible light.
The catalyst part 16 is arranged in an internal flow path 20a of an air
15 conditioning case 20 while passing through a through-hole 22 formed in the air
conditioning case 20. The catalyst part 16 thus arranged incurs a photocatalytic
reaction using the visible light of the light source part 14 to generate superoxide
radicals, and the superoxide radicals thus generated remove odors, bacteria, and
various contaminants in the air blown along the internal flow path 20a of the air
20 conditioning case 20.
Next, features of the vehicular air conditioning system according to the
present invention will be described in detail with reference to FIGS. 1 to 5.
Referring first to FIGS. 1 to 3, the vehicular air conditioning system of the
present invention has a structure in which the photocatalyst module 10 is installed at
25 the portion of the air conditioning case 20 between an intake unit 30 and a heat
exchanger unit 40.
More specifically, the photocatalyst module 10 is installed at the portion of
the air conditioning case 20 between the intake unit 30 that sucks an indoor or
9
outdoor air and blows the sucked air into the vehicle interior and the heat exchanger
unit 40 that cools or heats the air blown into the vehicle interior.
In particular, the photocatalyst module 10 is installed on the outer surface of
the air conditioning case 20 between the blower 32 and the heat exchanger 42 so
5 that it can be disposed in the air flow path between the blower 32 of the intake unit
30 and the heat exchanger 42 of the heat exchanger unit 40.
Preferably, the photocatalyst module 10 is installed on the outer surface of
the air conditioning case 20 on the downstream side of the blower 32 in the air
conditioning case 20 between the blower 32 and the heat exchanger 42.
10 Since the photocatalyst module 10 is installed in the air conditioning case 20
between the blower 32 and the heat exchanger 42, the catalyst part 16 is arranged
in the air flow path between the blower 32 and the heat exchanger 42. In particular,
the catalyst part 16 can be disposed in the air flow path on the downstream side of
the blower 32.
15 Therefore, the catalytic part 16 can come into contact with a large amount of
air discharged from the blower 32. As a result, the superoxide radicals generated
in the catalyst part 16 can come into contact with as much air as possible. As a
result, it is possible to significantly enhance the efficiency of removal of odors,
bacteria, and various contaminants in the air blown into the vehicle interior.
20 The photocatalyst module 10 is installed in the air conditioning case 20 on
the downstream side of the blower 32. As shown in FIG. 3, the photocatalyst
module 10 is preferably installed at the portion of the air conditioning case 20 on the
vehicle interior side of a dashboard 50.
This is to make it possible to replace, inspect, and repair the photocatalyst
25 module 10 on the vehicle interior side, whereby the photocatalyst module 10 can be
replaced, inspected, and repaired easily and conveniently.
In addition, as shown in FIGS. 1 and 2, the photocatalyst module 10 is
preferably installed in the blower case portion 34 of the air conditioning case 20 on
10
the downstream side of the blower 32. In particular, it is preferable to install the
photocatalyst module 10 on the sidewall 36 of the blower case portion 34 facing the
vehicle interior.
In this regard, the photocatalyst module 10 installed on the sidewall 36 of
5 the blower case portion 34 facing the vehicle interior is preferably installed on the
uppermost portion of the sidewall 36 of the blower case portion 34 in the direction of
gravity.
In particular, a blower resistor 60 is installed on the sidewall 36 of the blower
case portion 34 to control the rotational speed of the blower 32. The photocatalyst
10 module 10 is preferably installed in the blower case portion 34 above the blower
resistor 60 in the direction of gravity.
As shown in FIG. 4, the blower resistor 60 has a heat dissipation fin 62 that
passes through the blower case portion 34 and protrudes into the internal flow path
20a. At this time, moisture is often condensed on the heat dissipation fin 62 of the
15 blower resistor 60. The above configuration is adopted to avoid being affected by
the condensed moisture.
In this regard, the blower case portion 34 is composed of an upper case 34a
and a lower case 34b. The photocatalyst module 10 is installed in the case 34a,
and the blower resistor 60 is preferably installed in the lower case 34b of the blower
20 case portion 34.
Preferably, the photocatalyst module 10 is installed in the upper case 34a of
the blower case portion 34, and the blower resistor 60 is installed in the lower case
34b of the blower case portion 34.
Referring again to FIGS. 1 to 3, a through-hole 22 for use in assembling the
25 photocatalyst module 10 is formed in the sidewall 36 of the blower case portion 34.
The through-hole 22 is formed in the portion of the sidewall 36 of the blower case
portion 34 facing the vehicle interior to extend from the sidewall 36 of the blower
case portion 34 toward the internal flow path 20a.
11
The photocatalyst module 10 is inserted through the through-hole 22. In
particular, the photocatalyst module 10 is inserted and assembled so that the
catalyst part 16 can pass through the through-hole 22 and protrude into the internal
flow path 20a.
5 Meanwhile, the photocatalyst module 10 assembled through the throughhole 22 is detachably fixed to the sidewall 36 of the blower case portion 34 by the
fastening part 70. The fastening part 70 includes a plurality of fastening bosses 72
formed in the blower case portion 34 around the through-hole 22, a plurality of
fastening pieces 74 formed on the photocatalyst module 10 to correspond to the
10 fastening bosses 72, respectively, and a plurality of fastening screws 76 configured
to screw-fasten the fastening bosses 72 and the fastening pieces 74 corresponding
to each other.
The fastening bosses 72 are formed on both sides of the through-hole 22
with the through hole 22 interposed therebetween. The fastening pieces 74 are
15 formed on both sides of the module case 12 of the photocatalyst module 10 so as to
correspond to the fastening bosses 72 on both sides, respectively.
Since the fastening part 70 screw-fastens the photocatalyst module 10
inserted through the through-hole 22 to the sidewall 36 of the blower case portion 34,
the photocatalyst module 10 can be fixedly installed on the sidewall 36 of the blower
20 case portion 34.
In addition, since the photocatalyst module 10 fixedly installed in the blower
case portion 34 can be detached from the blower case portion 34 by loosening only
the fastening screws 76, it is possible to perform replacement, inspection, and
maintenance of the photocatalyst module 10 in an easy and convenient manner.
25 In this regard, the fastening bosses 72 of the fastening part 70 protrudes
from the sidewall 36 of the blower case portion 34 toward the vehicle interior. The
fastening pieces 74 of the photocatalyst module 10 corresponding to the fastening
bosses 72 are also configured to face the vehicle interior.
12
The reason for adopting this configuration is to enable detachment and
attachment of the photocatalyst module 10 on the side of the vehicle interior.
Referring again to FIGS. 1 to 3, the photocatalyst module 10 has a
directivity when attached to the blower case portion 34.
5 In particular, the electrical connector 12a installed on the side surface of the
module case 12 needs to be assembled through the through-hole 22 of the blower
case portion 34 so as to face the blower 32 side. This is because the external
connector C connected to the electrical connector 12a of the photocatalyst module
10 is arranged from the blower 32 side.
10 On the other hand, in the process of assembling the photocatalyst module
10 through the through-hole 22 of the blower case portion 34, the electrical
connector 12a of the photocatalyst module 10 may be erroneously assembled
toward the opposite side of the blower 32.
In particular, the through-hole 22 of the blower case portion 34 is left and
15 right symmetrical with respect to the blower 32, and the photocatalyst module 10 is
also left and right symmetrical in conformity with the shape of the through-hole 22.
Therefore, when assembling the photocatalyst module 10 through the through-hole
22 of the blower case portion 34, the photocatalyst module 10 may be erroneously
assembled while being reversed in the left/right direction. As a result, the electrical
20 connector 12a may be erroneously assembled toward the opposite side of the
blower 32.
In order to solve this problem, the air conditioning system of the present
invention includes an erroneous assembly prevention part 80 configured to prevent
the photocatalyst module 10 from being erroneously assembled in the left/right
25 direction when assembling the photocatalyst module 10 through the through-hole 22
of the blower case portion 34.
As shown in FIGS. 1, 4, and 5, the erroneous assembly prevention part 80
is the fastening part 70 that allows fastening of the photocatalyst module 10 to the
13
blower case portion 34 when correctly assembling the photocatalyst module 10
through the through-hole 22 of the blower case portion 34 and prevents fastening of
the photocatalyst module 10 to the blower case portion 34 when erroneously
assembling the photocatalyst module 10 through the through-hole 22 of the blower
5 case portion 34.
Describing this in detail, the erroneous assembly prevention part 80
includes fastening bosses 72 and fastening pieces 74 of the fastening part 70. The
fastening bosses 72 of the fastening part 70 protrude from the blower case portion
34 at different heights L1 and L2.
10 The fastening pieces 74 of the fastening part 70 are formed on the outer
surface of the photocatalyst module 10 and are configured to be aligned in
conformity with the length of the fastening bosses 72 of the blower case portion 34
without a gap when the photocatalyst module 10 is correctly assembled through the
through-hole 22 of the blower case portion 34 as shown in FIG. 4. Accordingly, the
15 photocatalyst module 10 can be screw-fastened to the fastening bosses 72, and
therefore can be fastened to the blower case portion 34.
Conversely, when the photocatalyst module 10 is erroneously assembled
through the through-hole 22 of the blower case portion 34 as shown in FIG. 5, the
photocatalyst module 10 is not aligned in conformity with the length of each of the
20 fastening bosses 72 of the blower case portion 34, leaving a gap between the
photocatalyst module 10 and the fastening bosses 72. Accordingly, the
photocatalyst module 10 cannot be screw-fastened to the fastening bosses 72, and
therefore cannot be fastened to the blower case portion 34.
Eventually, the erroneous assembly prevention part 80 determines whether
25 or not the fastening bosses 72 and the fastening pieces 74 can be fastened to each
other, and notifies an operator of the determination result so that the operator can
visually check whether or not the photocatalyst module 10 is erroneously assembled.
Thus, the photocatalyst module 10 is fundamentally prevented from being
14
erroneously assembled through the through-hole 22 of the blower case portion 34.
In particular, the electrical connector 12a is fundamentally prevented from
being erroneously assembled toward the opposite side of the blower 32 while the
photocatalyst module 10 is reversed in the left/right direction.
5 According to the vehicular air conditioning system of the present invention
having such a configuration, the photocatalyst module 10 is installed on the air flow
path between the heat exchanger 42 and the blower 32. Therefore, the catalyst
part 16 of the photocatalyst module 10 can come into contact with a large amount of
air discharged from the blower 32.
10 In addition, since the catalyst part 16 of the photocatalyst module 10 can
come into contact with a large amount of air discharged from the blower 32, the
superoxide radicals generated in the catalyst part 16 are allowed to come into
contact with as much air as possible, thereby enhancing the efficiency of removal of
odors, bacteria and various contaminants present in the air blown into the vehicle
15 interior, and significantly increasing the cleanliness of the air blown into the vehicle
interior.
In addition, since the photocatalyst module 10 is installed in the air
conditioning case 20 on the side of the vehicle interior without interference with
peripheral components, the photocatalyst module 10 can be more easily and
20 conveniently detached from and attached to the air conditioning case 20.
In addition, since the photocatalyst module 10 can be more easily and
conveniently detached from and attached to the air conditioning case 20, the
convenience of work can be improved during replacement, inspection, and
maintenance of the photocatalyst module 10.
25 In addition, if the photocatalyst module 10 is erroneously assembled, it is
fundamentally impossible to fasten the photocatalyst module 10 to the air
conditioning case 20 and it is possible to visually confirm the erroneous assembly.
Therefore, an operator can easily recognize whether the photocatalyst module 10 is
15
erroneously assembled.
In addition, since the operator can easily recognize whether or not the
photocatalyst module 10 is erroneously assembled, it is possible to fundamentally
prevent erroneous assembly of the photocatalyst module 10. As a result, it is
5 possible to prevent mass production of defective products.
While the preferred embodiments of the present invention have been
described above, the present invention is not limited to the above-described
embodiments. Various modifications and changes may be made without departing
from the scope and spirit of the present invention defined in the claims.
10
16
We claim:
1. A vehicular air conditioning system, comprising:
a photocatalyst module configured to purify air blown into a vehicle interior
5 along an internal flow path of an air conditioning case by emitting superoxide
radicals toward the internal flow path while generating a photocatalytic reaction,
wherein the photocatalyst module is installed on an outer surface of the air
conditioning case between a blower configured to suck an indoor or outdoor air and
blow the sucked air into the vehicle interior and a heat exchanger configured to cool
10 or heat an air to be blown into the vehicle interior.
2. The system of claim 1, wherein the photocatalyst module is installed in a
blower case portion of the air conditioning case between the blower and the heat
exchanger.
15
3. The system of claim 2, wherein the photocatalyst module is installed on an
outer surface of a sidewall of the blower case portion on the vehicle interior side with
respect to a dashboard.
20 4. The system of claim 3, wherein a blower resistor is installed on the outer
surface of the side wall of the blower case portion to control a rotational speed of the
blower, and
the photocatalyst module is installed at the blower case portion above the
blower resistor in a direction of gravity.
25
5. The system of claim 4, wherein the blower case portion is composed of an
upper case and a lower case assembled with each other,
the photocatalyst module is installed in the upper case of the blower case
17
portion, and
the blower resistor is installed in the lower case of the blower case portion.
6. The system of claim 5, wherein the photocatalyst module is assembled by
5 being inserted through a through-hole formed in the sidewall of the blower case
portion, and further comprising:
a fastening part configured to detachably fasten the photocatalyst module
assembled through the through-hole to the blower case portion on the side of the
vehicle interior.
10
7. The system of claim 6, wherein the fastening part includes a pair of fastening
bosses formed on both sides of the through-hole to protrude from the blower case
portion toward the vehicle interior, a pair of fastening pieces formed on the
photocatalyst module to correspond to the fastening bosses, respectively, and a pair
15 of fastening screws configured to screw-fasten the fastening bosses and the
fastening pieces corresponding to each other so that the photocatalyst module is
detachably fastened to the blower case portion.
8. The system of any one claim of claims 2 to 7, wherein the photocatalyst
20 module is assembled with the blower case portion to have a directivity in a specific
direction.
9. The system of claim 8, wherein the photocatalyst module further includes an
erroneous assembly prevention part configured to prevent the photocatalyst module
25 from being erroneously assembled in an incorrect direction when the photocatalyst
module is assembled through the through-hole.
10. The system of claim 9, wherein the erroneous assembly prevention part is a
18
fastening part that allows fastening of the photocatalyst module to the blower case
portion when correctly assembling the photocatalyst module through the throughhole in a correct direction and prevents fastening of the photocatalyst module to the
blower case portion when erroneously assembling the photocatalyst module through
5 the through-hole in an incorrect direction.
11. The system of claim 10, wherein the photocatalyst module is correctly
assembled through the through-hole so that an electrical connector for introducing
external electricity faces the blower.
10
12. The system of claim 11, wherein the erroneous assembly prevention part is
configured to prevent the electrical connector from being erroneously assembled in
a direction not facing the blower when the photocatalyst module is assembled
through the through-hole.
15
13. The system of claim 12, wherein the fastening part is configured to allow
fastening of the photocatalyst module to the blower case portion when correctly
assembling the photocatalyst module through the through-hole in a correct direction
so that the electrical connector faces the blower, and prevent fastening of the
20 photocatalyst module to the blower case portion when erroneously assembling the
photocatalyst module through the through-hole in an incorrect direction so that the
electrical connector does not face the blower.
14. The system of claim 13, wherein the fastening bosses of the fastening part
25 protrude from the blower case portion at different heights, and
the fastening pieces of the fastening part are formed on the photocatalyst
module so that the fastening pieces are aligned in conformity with the length of the
fastening bosses of the blower case portion without a gap when the photocatalyst
5
module is correctly assembled through the through-hole and so that the fastening
pieces are not aligned in conformity with the length of the fastening bosses of the
blower case portion to leave a gap when the photocatalyst module is erroneously
assembled through the through-hole, thereby allowing an operator to recognize
erroneous assembly of the photocatalyst module.