Vehicle air conditioner

Abstract

The present invention relates to a vehicle air conditioner, and the object is to improve the installation position of a photocatalyst module so that the superoxide radicals generated in the photocatalyst module can be brought into contact with a larger amount of air, thereby enabling the processing efficiency of removing malodor, bacteria, various contaminated substances in the air blown into the cabin to be improved. To achieve this object, the present invention is a vehicle air conditioner including a photocatalyst module that causes photocatalysis so as to release superoxide radicals into an internal flow path of an air conditioner housing unit, thereby purifying the air blown into the cabin along the internal flow path, wherein the photocatalyst module is installed on an outer surface portion of the air conditioner housing unit that is located between a blower for sucking and blowing internal air and external air into the cabin and a heat exchanger for cooling or heating the air blown into the cabin.

Description

Technical Field

[0001] This invention relates to a vehicle air conditioning system, and more specifically, to a vehicle air conditioning system in which the installation position of a photocatalyst module is improved so that superoxide radicals generated in the photocatalyst module can come into contact with a larger amount of air, thereby improving the efficiency of removing odors, bacteria and various pollutants present in the air blown into the vehicle interior. Background Technology

[0002] Motor vehicles are equipped with an air conditioning system that controls the temperature inside the vehicle. The air conditioning system draws in air from inside or outside the vehicle, heats or cools the drawn air to an optimal temperature, and then blows the heated or cooled air into the vehicle interior.

[0003] Specifically, in winter, the air blown into the vehicle is heated to keep the interior warm. In summer, the air blown into the vehicle is cooled to keep the interior cool. In this way, the air conditioning system always keeps the vehicle interior in a comfortable state.

[0004] In this type of air conditioning system, the important task is not only to maintain the air temperature inside the vehicle, but also to maintain the air quality inside the vehicle at its optimal level.

[0005] In particular, the air inside vehicles is easily polluted due to the confined and enclosed environment, as well as fine dust and various pollutants introduced from the outside. Maintaining optimal air quality inside vehicles to combat this air pollution has become an important task.

[0006] As a method for improving air quality inside vehicles, technology utilizing photocatalyst modules is available.

[0007] In this technology, a photocatalyst module equipped with a light source and a catalyst section is installed in the internal flow path of the air conditioning system. Visible light from the light source induces a photocatalytic reaction in the catalyst section. Superoxide radicals are generated through the photocatalytic reaction in the catalyst section. The generated superoxide radicals remove odors, bacteria, and various pollutants from the air blown into the vehicle interior.

[0008] Because the photocatalyst module removes odors, bacteria, and various pollutants from the air blown into the vehicle, it can improve the cleanliness of the air blown into the vehicle, thereby improving the air quality inside the vehicle.

[0009] This photocatalyst module is preferably installed in an optimal location within the air conditioning system components to effectively remove odors, bacteria, and various pollutants from the air blown into the vehicle interior.

[0010] In particular, it is preferable to install the photocatalyst module in the part with the highest airflow velocity in the internal flow path of the air conditioning system, so that the air can come into contact with superoxide radicals as much as possible.

[0011] In addition, for ease of repair, maintenance and inspection, the photocatalyst module is preferably installed in a location where it can be easily removed from and attached to the air conditioning system.

[0012] Specifically, various air conditioning components and vehicle parts are installed in and around the air conditioning system housing. For example, door actuators, heater core tubes, air conditioning ducts, dashboards, blower resistors, etc., are installed in and around the air conditioning system housing. The photocatalyst module needs to be installed in a portion of the air conditioning housing without interfering with these surrounding components, allowing the photocatalyst module to be easily removed and attached during repair, maintenance, and inspection. Summary of the Invention

[0013] Technical issues

[0014] In view of the inherent problems in the related art, the object of the present invention is to provide a vehicle air conditioning system in which the installation position of the photocatalyst module is improved so that the superoxide radicals generated in the photocatalyst module can come into contact with a larger amount of air.

[0015] Another object of the present invention is to provide a vehicle air conditioning system in which superoxide radicals generated in a photocatalyst module are allowed to come into contact with a larger amount of air, thereby improving the efficiency of removing odors, bacteria and various pollutants present in the air blown into the vehicle interior, improving the cleanliness of the air blown into the vehicle interior, and improving the air quality inside the vehicle.

[0016] Another object of the present invention is to provide a vehicle air conditioning system in which a photocatalyst module is installed in a portion of the air conditioning housing without interfering with surrounding components, so that the photocatalyst module can be easily removed and attached.

[0017] Another object of the present invention is to provide a vehicle air conditioning system in which a photocatalyst module is installed in a portion of the air conditioning housing without interfering with surrounding components, thereby improving usability during repair, replacement and inspection.

[0018] Technical solution

[0019] To achieve these objectives, a vehicle air conditioning system is provided, the vehicle air conditioning system comprising: a photocatalyst module configured to purify air blown into the vehicle interior along the internal flow path of an air conditioning housing by emitting superoxide radicals towards an internal flow path and simultaneously generating a photocatalytic reaction, wherein the photocatalyst module is mounted on the outer surface of the air conditioning housing between a blower and a heat exchanger, the blower being configured to draw in indoor or outdoor air and blow the drawn air into the vehicle interior, and the heat exchanger being configured to cool or heat the air to be blown into the vehicle interior.

[0020] In the system, the photocatalyst module can be installed in the blower housing portion of the air conditioning housing between the blower and the heat exchanger.

[0021] In the system, the photocatalyst module can be mounted relative to the dashboard on the outer surface of the side wall of the blower housing portion inside the vehicle.

[0022] In the system, a blower resistor can be installed on the outer surface of the side wall of the blower housing portion to control the rotational speed of the blower, and the photocatalyst module can be installed above the blower resistor in the blower housing portion along the direction of gravity.

[0023] In the system, the photocatalyst module can be assembled by being inserted through a through-hole formed in the sidewall of the blower housing portion, and the system may further include a fastener configured to detachably fasten the photocatalyst module assembled through the through-hole to the blower housing portion on the vehicle interior side.

[0024] In the system, the fastening portion may include: a pair of fastening bosses formed on both sides of the through hole to protrude from the blower housing portion toward the vehicle interior; a pair of fasteners formed on the photocatalyst module to correspond to the fastening bosses respectively; and a pair of fastening screws configured to thread and fasten the corresponding fastening bosses and fasteners, such that the photocatalyst module can be detachably fastened to the blower housing portion.

[0025] In the system, the photocatalyst module can be assembled with the blower housing portion to be directional in a specific direction.

[0026] In the system, the photocatalyst module may further include a misassembly prevention unit configured to prevent the photocatalyst module from being misassembled in the wrong direction when it is assembled through the through hole.

[0027] In the system, the misassembly prevention part can be a fastening part that allows the photocatalyst module to be fastened to the blower housing part when the photocatalyst module is correctly assembled in the correct direction through the through hole, and prevents the photocatalyst module from being fastened to the blower housing part when the photocatalyst module is incorrectly assembled in the wrong direction through the through hole.

[0028] In the system, the photocatalyst module can be properly assembled through the through-hole, such that the electrical connector for introducing external power faces the blower.

[0029] In the system, the misassembly prevention unit can be configured to prevent the electrical connector from being misassembled in a direction not facing the blower when the photocatalyst module is assembled through the through hole.

[0030] Beneficial effects

[0031] According to the vehicle air conditioning system of the present invention, the photocatalyst module is installed in the airflow path between the heat exchanger and the blower. Therefore, the catalyst section of the photocatalyst module can come into contact with a large amount of air discharged from the blower.

[0032] Furthermore, since the catalyst section of the photocatalyst module can come into contact with a large amount of air emitted from the blower, the superoxide radicals generated in the catalyst section are allowed to come into contact with as much air as possible, thereby improving the efficiency of removing odors, bacteria and various pollutants present in the air blown into the vehicle interior, and significantly improving the cleanliness of the air blown into the vehicle interior.

[0033] Furthermore, since the photocatalyst module is installed inside the air conditioning housing on the vehicle's interior side without interfering with surrounding components, the photocatalyst module can be more easily and conveniently removed from and attached to the air conditioning housing.

[0034] Furthermore, since the photocatalyst module can be more easily and conveniently removed from and attached to the air conditioner housing, the ease of operation can be improved during the replacement, inspection, and maintenance of the photocatalyst module.

[0035] Furthermore, if the photocatalyst module is incorrectly assembled, it cannot be securely fastened to the air conditioner housing at all, and the incorrect assembly can be visually confirmed. Therefore, the operator can easily identify whether the photocatalyst module has been incorrectly assembled.

[0036] Furthermore, because operators can easily identify whether the photocatalyst module has been incorrectly assembled, incorrect assembly of the photocatalyst module can be fundamentally prevented. As a result, mass production of defective products can be prevented. Attached Figure Description

[0037] Figure 1 This is an exploded perspective view showing the structure of a vehicle air conditioning system according to the present invention.

[0038] Figure 2 This is a front view showing the construction of a vehicle air conditioning system according to the present invention.

[0039] Figure 3 This is a horizontal cross-sectional view showing the construction of a vehicle air conditioning system according to the present invention.

[0040] Figure 4 It is along Figure 2 The cross-sectional view taken by line IV-IV in the figure shows the state in which the photocatalyst module constituting the vehicle air conditioning system of the present invention is correctly attached to the blower housing portion.

[0041] Figure 5 This is a diagram showing the state in which the photocatalyst module constituting the vehicle air conditioning system of the present invention is incorrectly attached to the blower housing portion. Detailed Implementation

[0042] Preferred embodiments of the vehicle air conditioning system according to the present invention will now be described in detail with reference to the accompanying drawings.

[0043] Before describing the features of the vehicle air conditioning system according to the present invention, reference will be made to... Figures 1 to 3 Briefly describe the photocatalyst module 10 of the vehicle's air conditioning system.

[0044] The photocatalyst module 10 includes a module housing 12, a light source 14 installed in the module housing 12, and a catalyst 16.

[0045] The light source 14 is built into the module housing 12 and is operated by electrical power applied to the electrical connector 12a of the module housing 12 to emit visible light.

[0046] The catalyst section 16 is arranged in the internal flow path 20a of the air conditioner housing 20 and passes through the through hole 22 formed in the air conditioner housing 20. The catalyst section 16 arranged in this way uses the visible light of the light source section 14 to initiate a photocatalytic reaction to generate superoxide radicals, and the superoxide radicals generated thereby remove odors, bacteria and various pollutants from the air blown along the internal flow path 20a of the air conditioner housing 20.

[0047] Next, we will refer to Figures 1 to 5The features of the vehicle air conditioning system according to the present invention are described in detail.

[0048] First refer to Figures 1 to 3 The vehicle air conditioning system of the present invention has a structure in which a photocatalyst module 10 is installed in the portion of the air conditioning housing 20 located between the air intake unit 30 and the heat exchanger unit 40.

[0049] More specifically, the photocatalyst module 10 is installed in the portion of the air conditioning housing 20 between the air intake unit 30, which draws in indoor or outdoor air and blows the drawn air into the vehicle interior, and the heat exchanger unit 40, which cools or heats the air blown into the vehicle interior.

[0050] Specifically, the photocatalyst module 10 is installed on the outer surface of the air conditioning housing 20 between the blower 32 and the heat exchanger 42, so that it can be positioned in the airflow path between the blower 32 of the intake unit 30 and the heat exchanger 42 of the heat exchanger unit 40.

[0051] Preferably, the photocatalyst module 10 is mounted on the outer surface of the air conditioning housing 20 downstream of the blower 32 in the air conditioning housing 20 between the blower 32 and the heat exchanger 42.

[0052] Since the photocatalyst module 10 is installed in the air conditioning housing 20 between the blower 32 and the heat exchanger 42, the catalyst unit 16 is arranged in the airflow path between the blower 32 and the heat exchanger 42. In particular, the catalyst unit 16 can be arranged in the airflow path on the downstream side of the blower 32.

[0053] Therefore, the catalyst section 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 section 16 can come into contact with as much air as possible. This significantly improves the efficiency of removing odors, bacteria, and various pollutants from the air blown into the vehicle interior.

[0054] The photocatalyst module 10 is installed in the air conditioner housing 20 downstream of the blower 32. For example... Figure 3 As shown, the photocatalyst module 10 is preferably installed in the portion of the air conditioning housing 20 located on the vehicle interior side of the dashboard 50.

[0055] This makes it possible to replace, inspect, and repair the photocatalyst module 10 from inside the vehicle, thus making it easy and convenient to replace, inspect, and repair the photocatalyst module 10.

[0056] In addition, such as Figure 1 and Figure 2 As shown, the photocatalyst module 10 is preferably installed in the blower housing portion 34 of the air conditioner housing 20 on the downstream side of the blower 32.

[0057] In particular, it is preferred to mount the photocatalyst module 10 on the side wall 36 of the blower housing portion 34 facing the vehicle interior.

[0058] In this respect, the photocatalyst module 10, which is mounted on the side wall 36 of the blower housing portion 34 facing the vehicle interior, is preferably mounted on the uppermost part of the side wall 36 of the blower housing portion 34 in the direction of gravity.

[0059] Specifically, the blower resistor 60 is mounted on the side wall 36 of the blower housing portion 34 to control the rotational speed of the blower 32. The photocatalyst module 10 is preferably mounted above the blower resistor 60 in the blower housing portion 34 along the direction of gravity.

[0060] like Figure 4 As shown, the blower resistor 60 has heat dissipation fins 62 that pass through the blower housing portion 34 and protrude into the internal flow path 20a. Typically, moisture condenses on the heat dissipation fins 62 of the blower resistor 60. The above-described structure is used to avoid the effects of condensed moisture.

[0061] In this respect, the blower housing portion 34 consists of an upper housing 34a and a lower housing 34b. The photocatalyst module 10 is installed in the upper housing 34a, and the blower resistor 60 is preferably installed in the lower housing 34b of the blower housing portion 34.

[0062] Refer again Figures 1 to 3 Through holes 22 for assembling photocatalyst module 10 are formed in the sidewall 36 of blower housing portion 34.

[0063] A through hole 22 is formed in the portion of the side wall 36 of the blower housing portion 34 facing the vehicle interior, extending from the side wall 36 of the blower housing portion 34 toward the interior flow path 20a.

[0064] The photocatalyst module 10 is inserted through the through hole 22. In particular, the photocatalyst module 10 is inserted and assembled such that the catalyst section 16 can pass through the through hole 22 and protrude into the internal flow path 20a.

[0065] Meanwhile, the photocatalyst module 10 assembled through the through hole 22 is detachably fixed to the side wall 36 of the blower housing portion 34 by the fastening part 70.

[0066] The fastening part 70 includes a plurality of fastening bosses 72 formed in the blower housing part 34 around the through hole 22, a plurality of fasteners 74 formed on the photocatalyst module 10 to correspond to the fastening bosses 72 respectively, and a plurality of fastening screws 76 configured to thread fasten the corresponding fastening bosses 72 and fasteners 74.

[0067] Fastening bosses 72 are formed on both sides of the through hole 22, wherein the through hole 22 is inserted between the fastening bosses 72. Fasteners 74 are formed on both sides of the module housing 12 of the photocatalyst module 10 as fastening bosses 72 corresponding to the two sides respectively.

[0068] Since the fastening part 70 threads the photocatalyst module 10 inserted through the through hole 22 to the side wall 36 of the blower housing part 34, the photocatalyst module 10 can be fixedly mounted on the side wall 36 of the blower housing part 34.

[0069] Furthermore, since the photocatalyst module 10, which is fixedly installed in the blower housing portion 34, can be removed from the blower housing portion 34 by simply loosening the fastening screws 76, the replacement, inspection and maintenance of the photocatalyst module 10 can be performed in an easy and convenient manner.

[0070] In this respect, the fastening boss 72 of the fastening part 70 protrudes from the side wall 36 of the blower housing part 34 toward the interior of the vehicle. The fastener 74 of the photocatalyst module 10 corresponding to the fastening boss 72 is also configured to face toward the interior of the vehicle.

[0071] The reason for adopting this structure is to enable the photocatalyst module 10 to be removed and attached from the inside of the vehicle.

[0072] Refer again Figures 1 to 3 The photocatalyst module 10 is directional when attached to the blower housing portion 34.

[0073] Specifically, the electrical connector 12a mounted on the side surface of the module housing 12 needs to be assembled to face the blower 32 side through the through hole 22 of the blower housing portion 34.

[0074] This is because the external connector C of the electrical connector 12a connected to the photocatalyst module 10 is arranged from the blower 32 side.

[0075] On the other hand, during the assembly of the photocatalyst module 10 through the through hole 22 of the blower housing portion 34, the electrical connector 12a of the photocatalyst module 10 may be incorrectly assembled toward the opposite side of the blower 32.

[0076] Specifically, the through-hole 22 of the blower housing portion 34 is symmetrical about left and right with respect to the blower 32, and the photocatalyst module 10 is also symmetrical about left and right with the shape of the through-hole 22. Therefore, when assembling the photocatalyst module 10 through the through-hole 22 of the blower housing portion 34, the photocatalyst module 10 may be assembled incorrectly, and may be reversed in the left / right direction. As a result, the electrical connector 12a may be assembled incorrectly with the opposite side of the blower 32 facing outwards.

[0077] To address this problem, the air conditioning system of the present invention includes an error assembly prevention unit 80, which is configured to prevent the photocatalyst module 10 from being incorrectly assembled in the left / right direction when assembling the photocatalyst module 10 through the through hole 22 of the blower housing portion 34.

[0078] like Figure 1 , Figure 4 and Figure 5 As shown, the misassembly prevention part 80 is a fastening part 70. When the photocatalyst module 10 is correctly assembled through the through hole 22 of the blower housing part 34, the fastening part 70 allows the photocatalyst module 10 to be fastened to the blower housing part 34, and when the photocatalyst module 10 is incorrectly assembled through the through hole 22 of the blower housing part 34, the fastening part 70 prevents the photocatalyst module 10 from being fastened to the blower housing part 34.

[0079] In detail, the error assembly prevention part 80 includes a fastening boss 72 and a fastener 74 of the fastening part 70.

[0080] The fastening boss 72 of the fastening part 70 protrudes from the blower housing part 34 at different heights L1 and L2.

[0081] The fasteners 74 of the fastening portion 70 are formed on the outer surface of the photocatalyst module 10 and are configured to align with the length of the fastening bosses 72 of the blower housing portion 34 without gaps when the photocatalyst module 10 is properly assembled through the through hole 22 of the blower housing portion 34. Figure 4 As shown.

[0082] Therefore, the photocatalyst module 10 can be threaded onto the fastening boss 72, and thus can be fastened onto the blower housing portion 34.

[0083] On the contrary, such as Figure 5 As shown, when the photocatalyst module 10 is incorrectly assembled through the through hole 22 of the blower housing portion 34, the photocatalyst module 10 is not aligned with the length of each of the fastening bosses 72 of the blower housing portion 34, thus leaving a gap between the photocatalyst module 10 and the fastening bosses 72.

[0084] Therefore, the photocatalyst module 10 cannot be threaded onto the fastening boss 72, and thus cannot be fastened onto the blower housing portion 34.

[0085] Finally, the misassembly prevention unit 80 determines whether the fastening boss 72 and the fastener 74 can be fastened to each other, and notifies the operator of the result, so that the operator can visually check whether the photocatalyst module 10 has been misassembled.

[0086] Therefore, it fundamentally prevents the photocatalyst module 10 from being incorrectly assembled through the through hole 22 of the blower housing portion 34.

[0087] In particular, when the photocatalyst module 10 is reversed in the left / right direction, it fundamentally prevents the electrical connector 12a from being incorrectly assembled on the opposite side of the blower 32.

[0088] According to the vehicle air conditioning system of the present invention, the photocatalyst module 10 is installed in the airflow path between the heat exchanger 42 and the blower 32. Therefore, the catalyst section 16 of the photocatalyst module 10 can come into contact with a large amount of air discharged from the blower 32.

[0089] Furthermore, since the catalyst section 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 section 16 are allowed to come into contact with as much air as possible, thereby improving the efficiency of removing odors, bacteria and various pollutants present in the air blown into the vehicle interior, and significantly improving the cleanliness of the air blown into the vehicle interior.

[0090] In addition, since the photocatalyst module 10 is installed in the air conditioning housing 20 inside the vehicle without interfering with surrounding components, the photocatalyst module 10 can be more easily and conveniently removed from and attached to the air conditioning housing 20.

[0091] In addition, since the photocatalyst module 10 can be more easily and conveniently removed from and attached to the air conditioner housing 20, the convenience of work can be improved during the replacement, inspection and maintenance of the photocatalyst module 10.

[0092] Furthermore, if the photocatalyst module 10 is incorrectly assembled, it cannot be securely fastened to the air conditioner housing 20 at all, and the incorrect assembly can be visually confirmed. Therefore, the operator can easily identify whether the photocatalyst module 10 has been incorrectly assembled.

[0093] Furthermore, since the operator can easily identify whether the photocatalyst module 10 has been incorrectly assembled, incorrect assembly of the photocatalyst module 10 can be fundamentally prevented. As a result, mass production of defective products can be prevented.

[0094] Although preferred embodiments of the invention have been described above, the invention is not limited to these embodiments. Various modifications and changes can be made without departing from the scope and spirit of the invention as defined in the claims.

Claims

1. A vehicle air conditioning system, the vehicle air conditioning system comprising: A photocatalyst module is configured to purify air blown into the vehicle interior along the internal flow path of the air conditioning housing by emitting superoxide radicals towards an internal flow path and simultaneously generating a photocatalytic reaction. The photocatalyst module is mounted on the outer surface of the air conditioning housing between the blower and the heat exchanger. The blower is configured to draw in indoor or outdoor air and blow the drawn air into the vehicle interior. The heat exchanger is configured to cool or heat the air to be blown into the vehicle interior. The photocatalyst module is installed in the blower housing portion of the air conditioner housing, between the blower and the heat exchanger. The photocatalyst module and the blower housing are assembled in a directional manner in a specific direction. The photocatalyst module further includes a misassembly prevention unit, which is configured to prevent the photocatalyst module from being misassembled in the wrong direction when it is assembled through the through-hole. The misassembly prevention part is a fastening part that allows the photocatalyst module to be fastened to the blower housing part when it is correctly assembled in the correct direction through the through hole, and prevents the photocatalyst module from being fastened to the blower housing part when it is incorrectly assembled in the wrong direction through the through hole.

2. The system according to claim 1, wherein, The photocatalyst module is mounted on the outer surface of the side wall of the blower housing portion relative to the dashboard on the inner side of the vehicle.

3. The system according to claim 2, wherein, A blower resistor is mounted on the outer surface of the side wall of the blower housing portion to control the rotational speed of the blower, and The photocatalyst module is mounted above the blower resistor in the blower housing section along the direction of gravity.

4. The system according to claim 3, wherein, The blower housing consists of an upper housing and a lower housing assembled together. The photocatalyst module is installed in the upper housing of the blower housing section. The blower resistor is installed in the lower housing of the blower housing portion.

5. The system according to claim 4, wherein, The photocatalyst module is assembled by being inserted through a through-hole formed in the sidewall of the blower housing portion, and the system further includes: A fastening part is configured to detachably fasten the photocatalyst module, which is assembled through the through hole, to the blower housing portion on the vehicle interior side.

6. The system according to claim 5, wherein, The fastening portion includes: a pair of fastening bosses formed on both sides of the through hole to protrude from the blower housing portion toward the vehicle interior; a pair of fasteners formed on the photocatalyst module to correspond to the fastening bosses respectively; and a pair of fastening screws configured to thread and fasten the corresponding fastening bosses and fasteners, such that the photocatalyst module can be detachably fastened to the blower housing portion.

7. The system according to claim 1, wherein, The photocatalyst module is properly assembled through the through-hole so that the electrical connector for introducing external power faces the blower.

8. The system according to claim 7, wherein, The misassembly prevention feature is configured to prevent the electrical connector from being incorrectly assembled in a direction not facing the blower when the photocatalyst module is assembled through the through-hole.

9. The system according to claim 8, wherein, The fastening part is configured to allow the photocatalyst module to be fastened to the blower housing portion when the photocatalyst module is correctly assembled in the correct direction through the through hole such that the electrical connector faces the blower, and to prevent the photocatalyst module from being fastened to the blower housing portion when the photocatalyst module is incorrectly assembled in the wrong direction through the through hole such that the electrical connector does not face the blower.

10. The system according to claim 9, wherein, The fastening bosses of the fastening part protrude from the blower housing at different heights, and The fasteners of the fastening portion are formed on the photocatalyst module such that when the photocatalyst module is correctly assembled through the through hole, the fasteners are aligned with the length of the fastening bosses of the blower housing portion without gaps, and when the photocatalyst module is incorrectly assembled through the through hole, the fasteners are not aligned with the length of the fastening bosses of the blower housing portion to leave gaps, thereby allowing the operator to identify incorrect assembly of the photocatalyst module.

Images