AIRFLOW APPARATUS

FIELD

The present invention is related to an air flow apparatus, and more particularly related to an air flow apparatus with a flexible structure.

BACKGROUND

The function of a fan device installed on a ceiling is to circulate and move air within a room or an enclosed space. Ceiling fans are designed to improve the airflow, creating a cooling effect during hot weather and providing additional comfort to occupants.

When the fan rotates, it creates a breeze that helps evaporate moisture from the skin, which can make people feel cooler even without lowering the room temperature. This “wind chill” effect can make a room feel several degrees cooler, allowing occupants to set their air conditioning systems at higher temperatures and potentially save energy.

In addition to cooling, some ceiling fans are designed with a reversible motor, allowing them to operate in both forward and reverse directions. In the forward direction, the fan creates a downdraft that helps cool the room. In the reverse direction, the fan creates an updraft, which helps distribute warm air trapped near the ceiling during colder months, improving the efficiency of heating systems.

Ceiling fans play a vital role in improving indoor comfort by promoting better air circulation within a room or enclosed space. These modular fan devices, installed in the cavity of a ceiling, are equipped with fan blades or impellers that rotate when activated. As the blades spin, they draw in the surrounding air and propel it downwards, creating a vertical airflow that moves throughout the room. This downward movement of air creates a gentle breeze that induces a “wind chill” effect, making occupants feel cooler even without lowering the room temperature significantly.

Moreover, the ceiling fan's function extends beyond just cooling. By moving air downwards, the fan also helps in mixing the air within the room. It pushes the air along the walls and floor, resulting in more even distribution throughout the space. This action reduces the occurrence of hot and cold spots, ensuring a more consistent and comfortable environment for occupants.

The circulation of air provided by ceiling fans can complement existing air conditioning and heating systems. During hot weather, the cooling effect of the fan enables occupants to raise the thermostat setting on the air conditioner, potentially leading to energy savings. Similarly, during colder weather, reversing the fan's direction helps distribute warm air trapped near the ceiling, improving the efficiency of heating systems and enhancing overall comfort.

Another advantage of ceiling fans is their ability to support ventilation in spaces with limited airflow. By promoting air movement, they help reduce stuffiness and assist in removing odors or smoke by directing them towards exhaust vents.

Proper air flow in an indoor environment is of utmost importance for maintaining human health and well-being. When indoor air becomes stagnant and lacks circulation, it can lead to a range of health issues and discomfort for occupants. Therefore, installing an airflow device, such as a ceiling fan, is a beneficial measure to ensure a well-ventilated and comfortable indoor space.

One of the key reasons why good air flow is essential is its role in providing an adequate supply of fresh oxygen. Humans require a steady flow of oxygen for respiration and cellular function. Stagnant air can lead to a depletion of oxygen levels, resulting in feelings of fatigue, dizziness, and impaired cognitive function.

Moreover, proper air circulation helps remove stale and stagnant air from the room. Stale air can contain accumulated pollutants, allergens, and unpleasant odors, leading to indoor air pollution. By promoting the exchange of fresh air, an airflow device reduces the concentration of harmful particles and helps maintain a healthier indoor environment.

Controlling humidity levels is another critical aspect of air flow. Effective ventilation helps regulate humidity, preventing the growth of mold and mildew, which thrive in damp conditions. Excessive moisture in the air can also cause condensation on windows and walls, leading to potential damage to building materials and an increased risk of health issues.

Temperature regulation is a significant benefit of well-distributed air flow. In warmer climates, a properly functioning airflow device, such as a ceiling fan, helps circulate cool air throughout the room, creating a more comfortable living or working environment. Similarly, in colder seasons, reversing the fan's direction helps distribute warm air trapped near the ceiling, providing a more even and comfortable indoor temperature.

Beyond physical health, indoor air quality significantly impacts mental focus and productivity. Fresh air and proper ventilation are associated with improved cognitive function, concentration, and overall work performance. In contrast, poor indoor air quality can lead to feelings of fatigue, irritability, and reduced productivity.

For individuals with respiratory conditions such as asthma and allergies, a well-ventilated space is particularly important. Air circulation helps disperse airborne irritants, reducing the concentration of allergens and pollutants, and thereby minimizing asthma attacks and allergy symptoms.

In conclusion, the installation of an airflow device, like a ceiling fan, plays a crucial role in promoting human health and comfort in indoor environments. By facilitating the exchange of fresh air, controlling humidity levels, removing contaminants, and supporting temperature regulation, a well-designed airflow system contributes to a healthier, more comfortable, and productive living or working space. The positive impact on respiratory health, mental focus, and overall indoor air quality underscores the significance of installing an airflow device to enhance the well-being of occupants.

Incorporating ceiling fans into indoor spaces enhances energy efficiency by reducing the reliance on air conditioning and heating alone. With their cooling and air-circulating abilities, ceiling fans provide occupants with a comfortable environment while potentially reducing overall energy consumption.

It is beneficial if a modular fan device with a compact size may be designed and easy to be installed.

SUMMARY

In some embodiments, a airflow apparatus includes an air tunnel, a fan motor, a fan blade, a box housing and a slider lock.

The fan blade is driven by the fan motor for moving air moving in the air tunnel.

The box housing encloses the fan motor, the fan motor and the fan blade.

The slider lock is attached to the box housing.

The slider lock has a slider part movable from a first position to a second position.

When the box housing is placed upon the bracket in a first installation mode, the slider part is moved from the first position to the second position, a fastener of the slider lock is operated to engage the bracket for fastening the box housing to the bracket.

To release the box housing from the bracket, the fastener of the slider lock is operated to be unfastened so that the slider part is movable from the second position back to the first position to leave the bracket.

In some embodiments, the fastener is a screw.

The screw is rotated to fasten the box housing to the bracket.

In some embodiments, when the box housing is placed upon the bracket, a gravity force drags the box housing downwardly.

When the screw rotated to move upwardly to engage the bracket, an upward force is applied to the screw upwardly to increase friction between the screw and the bracket.

In some embodiments, the slider lock has a base part to move in a sliding track on a lateral wall of the box housing.

The base part and the sliding part are formed as two parts by bending a single plate.

In some embodiments, an auxiliary fastener is disposed on the base part to be operated to fasten the slider lock to the lateral wall.

In some embodiments, the airflow apparatus may also include two expandable side units.

The two expandable side units are attached to a lateral side of the box housing.

The expandable side units have extending portions extending respectively from two opposite peripheral edges of the box housing.

There is an ear hole for each expandable side unit for inserting a fixing hook placed on an installation wall surface in a second installation mode.

In some embodiments, the expandable side unit includes a geometry plate.

The ear hole is disposed on the geometry plate.

In some embodiments, the expandable side unit is detached from the box housing in the first installation mode.

In some embodiments, the expandable side unit is pushed and collapsed in a storage area of the box housing in the first installation mode.

The expandable side unit is pulled to extend in the second installation mode.

In some embodiments, the expandable side unit is rotated to extend in the second installation mode.

The expandable side unit is rotated to collapsed in a storage area of the box housing in the first installation mode.

In some embodiments, the expandable side unit is fixed to the box housing with a rotation axle.

In some embodiments, a first air vent of the box housing faces downwardly to the bracket.

In some embodiments, a second air vent of the box housing is disposed to another lateral side.

The air tunnel connects the first air vent to the second air vent.

In some embodiments, the airflow apparatus may also include an ultraviolet light source for sterilization.

The ultraviolet light source is placed in the air tunnel and concealed by the box housing.

In some embodiments, the airflow apparatus may also include a illumination light source.

The illumination light source emit light escaping from the first air vent.

In some embodiments, the box housing has a light bracket for attaching the illumination light source.

The first air vent is a gap aside the light bracket.

In some embodiments, the illumination light source is detachable from the light bracket.

In some embodiments, the airflow apparatus may also include the bracket.

The expandable track has a track part and a bar part, where the bar part is retracted partly in the track part to change a length of the expandable track.

In some embodiments, the track parts of the two extendable tracks are connected to opposite sides of the bracket.

In some embodiments, the bracket further has two side bars for connecting the two extendable tracks forming a rectangular shape.

The two side bars are fixed on two opposite walls.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 illustrates an airflow apparatus embodiment.

FIG. 2 illustrates the airflow apparatus installed in a second installation mode.

FIG. 3 illustrates two detachable expandable side units to be attached to a box housing.

FIG. 4 illustrates an enlarged view of an expandable side unit example.

FIG. 5 illustrates a bottom perspective view of an airflow apparatus embodiment.

FIG. 6 illustrates a zoom-up view of a fixing unit.

FIG. 7 illustrates another fixing unit example.

FIG. 8 illustrates a zoom-up view of the example in FIG. 7.

FIG. 9 illustrates installation hole examples.

FIG. 10 illustrates connector structure examples.

FIG. 11 illustrates connector structure example.

FIG. 12 illustrates an example of an expandable side unit.

FIG. 13A illustrates a zoom-up view showing connection example.

FIG. 13B shows another example.

FIG. 14A and FIG. 14B show an extendible frame example.

FIG. 15A and FIG. 15B show an expandable side unit operation example.

FIG. 16A and FIG. 16B show another expandable side unit operation example.

FIG. 17A illustrates another lighting apparatus.

FIG. 17B illustrates another operation mode of the example in FIG. 17A.

FIG. 18A is a zoom-up view to illustrate another fastener in the example of FIG. 17A.

FIG. 18B is another operation mode for the example in FIG. 18A.

FIG. 19 shows an airflow apparatus placed upon a bracket.

FIG. 20 shows a zoom-up view of the example for some components in the example of FIG. 19.

FIG. 21 shows a side view of the example in FIG. 20.

FIG. 22 shows a zoom-up view of the example of FIG. 21.

FIG. 23 shows another operation status of the example in FIG. 22.

FIG. 24 shows a slider lock example.

FIG. 25 shows another view angle of the example in FIG. 24.

FIG. 26 shows another view angle of the example in FIG. 24.

DETAILED DESCRIPTION

In FIG. 17A, an airflow apparatus includes an air tunnel 533, a fan motor 507, a fan blade 534, a box housing 501 and a slider lock 537.

The fan blade 534 is driven by the fan motor 507 for moving air moving in the air tunnel 533.

The fan blade 534 driven by the fan motor 507 may be a mechanical structure for disturbing air to move in a desired direction.

Various types of fans may be used to meet different design requirements. Fans are essential devices used to move air in a desired direction, providing comfort and ventilation in various settings, from households to industrial environments. To achieve efficient air movement, fans utilize different types of blades, each designed for specific purposes. One common type of fan blade is the axial fan blade, which resembles the shape of airplane propellers. These blades are ideal for generating a large volume of airflow at relatively low pressures and are commonly found in household fans, computer cooling fans, and small ventilation systems.

In contrast, centrifugal fan blades are characterized by their curved shape, resembling a hamster wheel or squirrel cage. These blades are designed to move air radially, creating a higher pressure difference between the inlet and outlet sides. Centrifugal fans are more suitable for situations where higher pressures are needed, such as in HVAC systems, industrial ventilation, and air conditioning units.

Another type of blade used in fans is the forward-curved blade, which features a curved shape with the concave side facing forward. These blades are capable of delivering high airflow at relatively low noise levels, making them popular choices in commercial HVAC systems and cleanroom environments. The forward-curved blades are efficient and energy-saving, making them an attractive option for large-scale air circulation applications.

Additionally, backward-curved fan blades have a concave shape facing backward, making them effective for handling high-pressure and high-flow rate applications. These blades are commonly used in industrial ventilation systems, dust collection systems, and exhaust fans. Backward-curved blades offer excellent performance even under challenging conditions and are known for their energy efficiency.

For specific tasks requiring precise control over airflow direction, adjustable or variable pitch blades are used. These blades can be adjusted to change the pitch angle, allowing for more flexibility in directing the airflow as needed. Variable pitch blades are found in applications like wind tunnels, aircraft engine fans, and some industrial processes that demand precise airflow management.

Each type of fan blade offers distinct advantages, making them suitable for different air-moving applications. The choice of blade design depends on factors such as the desired airflow volume, pressure requirements, noise considerations, energy efficiency, and the specific environment in which the fan will operate. Manufacturers carefully select the appropriate blade type based on these factors to ensure optimal performance and efficiency for the intended application.

In some embodiments, when the airflow apparatus is to be installed in a room that requires quiet environment. Noise-free design of fan structure is preferred.

Noise-free fan designs have become a significant area of focus in recent years, as consumers increasingly seek quieter and more comfortable environments. Several innovative fan designs have emerged to address noise-related concerns while maintaining efficient air circulation. Here are some of these noise-free fan designs:

Bladeless Fans: One of the most popular noise-free fan designs is the bladeless fan, which replaces traditional fan blades with a sleek and innovative air multiplication technology. These fans draw air through the base and then propel it through a hollow ring, creating a smooth and consistent airflow. The absence of rotating blades eliminates the typical noise associated with fan operation, resulting in a whisper-quiet fan experience. Bladeless fans are not only quieter but also easier to clean and safer, making them an excellent choice for households with children or pets.

Vortex Fans: Vortex fans are another noise-free fan design that operates on the principle of creating a vortex or column of air. Instead of relying on fast-spinning blades, these fans use a specialized inlet design to draw air and create a swirling motion that generates a strong, stable airflow. Vortex fans are renowned for their quiet operation, making them ideal for bedrooms, libraries, or office spaces where noise disruption is undesirable. Additionally, these fans often consume less power, making them an energy-efficient option.

Helix Fans: Helix fans are a unique design that combines aesthetics with functionality. These fans feature helical or spiral-shaped blades that efficiently move air through the fan assembly. The carefully designed spiral blades create a smooth airflow path, reducing turbulence and noise generation. Helix fans are not only quieter but also add a touch of elegance to the room's decor. They are suitable for both residential and commercial settings, where noise reduction and visual appeal are priorities.

Acoustic Damping Technology: Some fan manufacturers incorporate acoustic damping technologies to minimize noise. These fans are equipped with noise-absorbing materials within the fan casing, and sometimes even within the blades themselves. These materials help dampen the vibrations and sound produced during fan operation, resulting in a quieter fan experience. Acoustic damping technology is often combined with blade designs optimized for reduced noise, ensuring a nearly silent fan operation.

Magnetic Levitation Fans: Magnetic levitation (maglev) fans employ advanced magnetic levitation technology to suspend the fan blades without any physical contact with the motor. The absence of friction reduces noise significantly, leading to an almost noise-free operation. Additionally, maglev fans tend to have longer lifespans and consume less power compared to traditional fans with bearings. These fans are popular in high-end cooling systems, electronics, and some household appliances.

At least these noise-free fans are proper to be integrated with the embodiments mentioned here. By integrating these noise-free fans, with some silencing structures 539, the effect is better particularly in important in some requirements.

The silencing structures may be at least any of following components.

Acoustic Foam Pads: These are sound-absorbing foam pads strategically placed inside the fan casing to absorb and dampen the sound waves produced by the rotating blades and motor. The foam material helps reduce noise and prevent it from escaping into the surrounding environment.

Sound-Absorbing Coatings: Special sound-absorbing coatings are applied to the interior surfaces of the fan casing. These coatings are designed to absorb sound energy and minimize vibrations, contributing to a quieter fan operation.

Vibration Isolators: Vibration isolators are placed between the fan motor and the fan casing. They are made of rubber or other elastic materials that dampen vibrations and prevent them from transferring to the outer surfaces of the fan, thereby reducing noise transmission.

Blade Design Optimization: Fan manufacturers may design the fan blades with specific shapes and contours to minimize noise generation. By optimizing the blade design, turbulence and air disturbances are reduced, resulting in quieter fan operation.

Magnetic Bearings: Some fans use magnetic bearings instead of traditional mechanical bearings. Magnetic bearings allow the fan blades to float or levitate within the fan assembly, eliminating friction and reducing noise levels significantly.

Variable Speed Control: Noise reduction can be achieved by incorporating variable speed control in the fan-device. Operating the fan at lower speeds reduces noise levels while still providing adequate airflow for cooling or ventilation needs.

Casing Design: The overall design of the fan casing can also play a role in noise reduction. A well-designed casing with smooth airflow paths and rounded edges can help minimize air turbulence and, consequently, reduce noise.

Noise Reduction Motor Technology: Advanced motor technologies with noise reduction features can be employed to achieve quieter fan operation. These motors are designed to generate less noise while maintaining efficient performance.

Active Noise Cancellation: In some high-end fan-devices, active noise cancellation technology is utilized. This technology involves the use of microphones to pick up the fan's noise and then generating anti-noise signals to cancel out the unwanted noise effectively.

The box housing 501 encloses the fan motor 507, the air tunnel 507 and the fan blade 534.

The slider lock 537 is attached to the box housing 501.

The slider lock 537 has a slider part 541 movable from a first position 542 to a second position 543 along a locking direction 513. When the slider part 541 stays at the first position 542, the box housing 501 may be detached from a bracket 504. When the slider part 541 stays at the second position 543, the box housing 501 is not easy to be detached from the bracket 504, particularly when the fastener 512 is further locked to fasten the box housing 501 to the bracket 504.

When the box housing 501 is placed upon the bracket 504 in a first installation mode, the slider part 541 is moved from the first position 542 to the second position 543, a fastener 512 of the slider lock 537 is operated to engage the bracket 504 for fastening the box housing 501 to the bracket 504.

To release the box housing 501 from the bracket 504, the fastener 512 of the slider lock 537 is operated to be unfastened so that the slider part 541 is movable from the second position 543 back to the first position 542 to leave the bracket 504.

There are some examples explain the bracket 504 in following drawings and disclosure.

There are two air vents 503, 502 for air to move along the air tunnel 533. For example, air 508 is brought along the air path of the air tunnel 533 to move. Opposite direction of air moving may be used depending on different design requirements. For example, in some embodiments, the airflow apparatus is used for brining air out from a room and in some other embodiments, the airflow apparatus is used for bringing external air into a room, e.g. from an external environment or cooling air into the room.

In some embodiments, the fastener 512 is a screw.

The screw is rotated to fasten the box housing 501 to the bracket 504.

In some embodiments, when the box housing 501 is placed upon the bracket 504, a gravity force drags the box housing downwardly.

FIG. 17B shows another status of example of FIG. 17A, when the slider part 541 is moved from the first position 542 to the second position 543. Same reference numerals in FIG. 17B or in other drawings, if they are the same, refer to the same components and may not be described and explained again.

In FIG. 17B, the arrow 5421 shows the direction of gravity, also, downwardly.

When the screw as the fastener 512 rotated to move upwardly to engage the bracket 504, an upward force 541 is applied to the screw 512 upwardly to increase friction 520 between the screw 512 and the bracket 504.

In FIG. 17A and FIG. 17B, the slider lock 537 has a base part 577 to move in a sliding track 510 on a lateral wall 573 of the box housing 501.

The base part 577 and the sliding part 541 are formed as two parts by bending a single plate. For example, a metal sheet may be stamped to create the necessary shape, and then is bent to form two connected parts, one is the sliding part 541 and the other is the base part 577.

In FIG. 17B, an auxiliary fastener 514 is disposed on the base part 577 to be operated to fasten the slider lock 537 to the lateral wall 573.

Please refer to FIG. 18A and FIG. 18B, which show a zoom-up view of a portion of the structure in FIG. 17A and FIG. 17B for another view angle.

FIG. 18A and FIG. 18B show two operation modes of an example of an auxiliary fastener.

In FIG. 18A and FIG. 18B, the auxiliary fastener 514 is screwed to the right direction for the auxiliary screw to engage a corresponding surface 522 of the lateral wall of the box housing.

In this example, the auxiliary fastener 514 which is a screw placed on a part 521 of the slider lock is screwed via a direction 523 to approach to the surface 522 of the lateral wall to further fasten the slider lock to a specific position of the lateral wall.

FIG. 19 shows an example of the slider lock structure mentioned above in more details.

In FIG. 19, four slider locks 902, 903, 904 and 905 are disposed for fastening the box housing 909 of an airflow apparatus to a bracket with two tracks 906, 908 that are fixed to an installation platform 901.

FIG. 20 shows a zoom-up view of the area ‘A’ in FIG. 19. The slider lock 904 has a sliding part 910 and a base part 913 by bending a single piece component in a position 916. There is a fastener 9111 and an auxiliary fastener 912. A portion of the base part 914 is inserted into a sliding slit as a sliding track 915.

FIG. 21 is a side view of the example in FIG. 20. In FIG. 21, a side view of the box housing and the slider lock 904 are illustrated.

FIG. 22 shows a zoom-up view of the area D in FIG. 21.

In FIG. 22, the fastener 911 is used to fasten the sliding part 910 to the bracket. The auxiliary fastener 912 helps further keeps components coupled in a robust way, to decrease unnecessary noise.

FIG. 23 shows another status of the slider lock with a fastener 911, in which the slider lock is at a different configuration to detach the box housing from the bracket.

FIG. 24 shows a zoom-up view of a slider lock with a fastener 911 and an auxiliary fastener 912.

FIG. 25 and FIG. 26 show another view of the example of the slider lock.

In FIG. 13B, an airflow apparatus includes an air tunnel 602, a fan motor 604, a fan blade 605, a box housing 601 and two expandable side units 609.

FIG. 13B is a side view and thus, an expandable side unit 609 is visible. Another expandable side unit is attached on the same lateral side 603 of the box housing 601.

FIG. 3 shows an exploded view of an example. In FIG. 3, there are two expandable side units 2 to be selectively attached to the box housing 1.

The fan blade 605 is driven by the fan motor 604 for moving air moving in the air tunnel 602.

There is a first air vent 613 and a second air vent 620. Air may flow from first air vent 613 to the second air vent 620. In some other embodiments, the air is flowing from the second air vent 620 to the first air vent 613.

Various fan blade designs and associated driving motors are used in different types of fans to meet specific airflow requirements and aesthetic preferences.

Standard Fan Blades with AC Motors: Traditional ceiling fans and box fans often use standard fan blades that have a slightly curved shape to efficiently move air. These fans are commonly powered by AC (alternating current) motors, which are cost-effective and reliable for continuous use. AC motors provide a steady rotation to the fan blades, creating a constant and consistent airflow.

Bladeless Fans with DC Motors: Bladeless fans, also known as air multipliers, are innovative designs that use a hidden impeller to draw in air and then expel it through a narrow slot. These fans provide a smooth and uninterrupted airflow without visible blades. Bladeless fans often employ DC (direct current) motors, which are more energy-efficient than AC motors. DC motors offer variable speed control, allowing users to adjust the airflow intensity as needed.

Propeller-Like Blades with High-Velocity Motors: High-velocity fans are commonly used in commercial and industrial settings where powerful airflow is required. These fans feature propeller-like blades that resemble airplane propellers. They are driven by high-velocity motors that generate powerful gusts of air, making them ideal for cooling large spaces or removing heat from industrial areas.

Sculptural Fan Blades with DC Motors: Some modern ceiling fans come with sculptural or artistic fan blades that serve both functional and decorative purposes. These fans often utilize DC motors for energy efficiency and smooth operation. The unique designs of the fan blades can enhance the aesthetics of the room while providing efficient air circulation.

Blades with Adjustable Angles and Motors with Remote Controls: Certain fan models, particularly ceiling fans, are equipped with blades that have adjustable angles. These fans allow users to change the angle of the blades to control the direction and intensity of the airflow. They often come with motors featuring remote control functionality, enabling users to conveniently adjust the fan speed and blade angle from a distance.

Retractable Fan Blades with Reversible Motors: Some contemporary ceiling fans are designed with retractable blades that remain concealed when the fan is not in use. When activated, the fan blades extend and rotate to circulate air. These fans often feature reversible motors, allowing them to function in both summer and winter modes. In summer mode, the fan creates a cooling breeze, while in winter mode, it distributes warm air trapped near the ceiling.

The box housing 601 encloses the air tunnel 602, the fan motor 604 and the fan blade 605.

The box housing 601 has multiple fixing units 606, 607 for fixing to a bracket when the box housing 601 is place upon the bracket for limiting movement of the box housing in a first installation mode.

FIG. 2 shows an example of a first installation mode. In FIG. 2, the box housing 1 is placed upon a bracket 3.

The two expandable side units 609 are attached to a lateral side 603 of the box housing 1.

The expandable side units 609 have extending portions extending respectively from two opposite peripheral edges of the box housing 1.

In the example of FIG. 10, an expandable side unit 2 has an extending portion 802 extending from a peripheral edge 801 of the box housing 1. The other expandable side unit extends from an opposite peripheral edge of the box housing 1 symmetrically (not shown).

There is an ear hole 803 for each expandable side unit 2 for inserting a fixing hook placed on an installation wall surface in a second installation mode.

FIG. 13B shows an example that the expandable side unit 609 is attached to a fixing hook 608 with its ear hole, as illustrated in FIG. 10 and explained above.

In some embodiments, the expandable side unit includes a geometry plate.

FIG. 10 shows an example of such geometry plate 804, which can be a rectangular shape, a triangle shape, or any other geometric shape.

The ear hole 803 is disposed on the geometry plate 804.

In some embodiments, the expandable side unit is detached from the box housing in the first installation mode.

For example, the expandable side unit is detached from the box housing and removed when the box housing is to be installed in the second installation mode.

In FIG. 16A and FIG. 16B, the expandable side unit 795 is pushed and retracted in a storage area 796 of the box housing 792 in the first installation mode.

The expandable side unit 795 is pulled to extend by leaving from the storage area 796 in the second installation mode.

In FIG. 15A and FIG. 15B, the expandable side unit 793 is rotated to extend in the second installation mode.

The expandable side unit 793 is rotated to be retracted in a storage area 791 of the box housing 792 in the first installation mode.

In FIG. 15A, the expandable side unit 793 is fixed to the box housing 792 with a rotation axle 794.

In FIG. 14A and Fig. B, the bracket has two extendable tracks 701, 703.

The extendable track 701 has a track slit 705.

The fixing unit passes through the track slit and bent to limit movement of the box housing with respect to the bracket. Please also refer to the example of FIG. 13B explained above.

In some embodiments, the track slit is an elongated slit with two opposite ends, as illustrated in FIG. 14A and FIG. 14B.

The fixing unit is fixed within the range of the elongated slit.

In some embodiments, the fixing unit has an elastic hook to pass through the elongated slit and fasten the fixing unit to the expandable track.

FIG. 5 shows an elastic hook 42 passing through the elongated slit to fasten the box housing to the bracket.

In some embodiments, the fixing unit has a bending part.

The bending part is bent after passing through the track slit to fasten the fixing unit to the extendable track.

In some embodiments, the bending part has a first bending portion and a second bending portion.

FIG. 6 shows an example of such bending part 432 that includes a first bending portion 43 and a second bending portion 431

The first bending portion 43 and the second bending portion 431 are bent in opposite directions.

In FIG. 14A and FIG. 14B, the airflow apparatus may also include the bracket.

The expandable track has a track part 705 and a bar part 703, where the bar part 703 is retracted partly in the track part 705 to change a length 708 of the expandable track 702.

In FIG. 14A and FIG. 14B, the track parts 705 of the two extendable tracks are connected to opposite sides of the bracket.

Specifically, the track parts are arranged in a symmetric way as illustrated in FIG. 14A and FIG. 14B, which is found lowering possible noise and shaking.

In FIG. 13B, a first air vent 613 of the box housing 1 faces downwardly to the bracket.

In FIG. 13B, a second air vent 620 of the box housing 1 is disposed to another lateral side 6201.

The air tunnel connects the first air vent to the second air vent.

In FIG. 13B, the airflow apparatus may also include an ultraviolet light source 611 for sterilization.

The ultraviolet light source 611 is placed in the air tunnel and concealed by the box housing 1.

In some embodiments, the airflow apparatus may also include a illumination light source 6121.

The illumination light source 6121 emit light escaping from the first air vent 613.

In some embodiments, the box housing has a light bracket 612 for attaching the illumination light source 6121.

The first air vent 613 is a gap aside the light bracket 612.

In some embodiments, the illumination light source 612 is detachable from the light bracket 6121.

In FIG. 14A, the bracket further has two side bars 706, 707 for connecting the two extendable tracks 701, 702 forming a rectangular shape.

The two side bars 706, 707 are fixed on two opposite walls.

FIG. 1 to FIG. 12 show several examples of airflow apparatus embodiments. Same references refer to same components and may not be explained again for every drawing for brevity.

In FIG. 1, a box housing 1 is used for containing a fan device. There is an expandable side unit 2 for fixing the box housing 1 to a wall 8.

In FIG. 2, it shows that the box housing 1 is attached to a different installation wall 8 with a bracket 3.

FIG. 3 shows two expandable side units 2 detachable from a box housing 1.

The expandable side unit 2 has an installation plate 51, an installation hole 53, an elastic protruding part 53, and another installation hole 52 on the box housing 1.

There is a positioning cavity 6 for attaching the expandable side unit 2.

There is a bending card 7 and a detaching structure 5.

FIG. 4 shows a zoom-up view of the example of FIG. 3.

In FIG. 4, it more clearly shows the components mentioned in FIG. 3.

FIG. 5 shows another installation mode. In FIG. 5, the box housing 1 is placed on a bracket 3. The bracket 3 has an installation bar 31 and a expanding bar 32. There is a fixing unit 4. There is a bending part 43 fixed to an elongated slit 45.

FIG. 6 is a zoom-up view of the example of FIG. 5, which more clearly show the relations among components mentioned above.

FIG. 7 shows another view of an embodiment.

FIG. 8 shows the elastic hook 42 with an bending shape from a base part 41.

FIG. 9 shows a zoom-up view of another view of an example. In addition to components mentioned above, there is a protruding structure 57 and an adjusting hole 58.

FIG. 10 shows another view of an example with components mentioned above.

FIG. 11 shows another example in a zoom-up view with components mentioned above in a different manner.

FIG. 12 shows another example in a zoom-up view with components mentioned above in a different manner.

FIG. 13A shows a zoom-up view of a connection position structure in another manner.

The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.

The embodiments were chosen and described in order to best explain the principles of the techniques and their practical applications. Others skilled in the art are thereby enabled to best utilize the techniques and various embodiments with various modifications as are suited to the particular use contemplated.

Although the disclosure and examples have been fully described with reference to the accompanying drawings, it is to be noted that various changes and modifications will become apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of the disclosure and examples as defined by the claims.

AIRFLOW APPARATUS

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