A portable air curtain machine

Abstract

This invention provides a portable air curtain, comprising a housing and a mounting base, with the housing rotatably mounted on the mounting base. The mounting base includes a base plate, a first connecting plate, and a second connecting plate. The base plate is parallel to an axis of the impeller, and the first connecting plate is perpendicular to the axis. Rotating components are respectively provided between the first and second connecting plates and the housing to achieve a rotatable connection between the housing and the mounting base. During installation, the base plate can serve as a base for flat installation and wall-mounted installation, while the first connecting plate can serve as a stand-up mounting base. Simultaneously, a fastening assembly between the mounting base and the housing allows for positioning and locking of the housing's rotational position relative to the mounting base, thus adjusting the direction of the strip-shaped air outlet. This portable air curtain can be wall-mounted, floor-standing, or installed vertically, and the adjustable direction of the strip-shaped air outlet enables diverse installation methods.

Description

Technical Field

[0001] This invention relates to the field of air conditioning appliances, and more particularly to a portable air curtain machine. Background Technology

[0002] An air curtain machine is an air purification device that uses a high-speed motor to drive a cross-flow or centrifugal fan to generate a powerful airflow, forming an "invisible curtain." Also known as an air curtain machine, air barrier, or air door, air curtain machines are typically installed above the entrances of shopping malls, theaters, restaurants, conference halls, etc., where cooling, dust prevention, and heat insulation are required. They separate indoor and outdoor air, facilitating entry and exit while preventing the exchange of hot and cold air. Simultaneously, they provide dust prevention, pollution prevention, and insect repellent.

[0003] Currently, the air curtain machines available on the market have a single installation method and the direction of the air outlet is difficult to adjust, making them unsuitable for various installation environments. Different models of air curtain machines need to be selected for different environments to meet the installation requirements. At the same time, the existing air curtain machines are inconvenient to carry or adjust. Summary of the Invention

[0004] The purpose of this invention is to provide a portable air curtain machine that has various installation methods, is easy to carry and adjust.

[0005] A portable air curtain machine includes: a housing comprising a main body and two side plates respectively disposed at both ends of the main body; the main body of the housing having a strip-shaped air inlet and a strip-shaped air outlet opposite to the strip-shaped air inlet; an air duct disposed within the housing, the air duct connecting the strip-shaped air inlet and the strip-shaped air outlet; a motor fixed inside the housing by a motor mounting plate; and a fan wheel disposed within the air duct, one end of which is connected to an output shaft of the motor, and the other end of which is rotatably mounted on a side away from the motor; the fan wheel rotates with the motor to allow air to enter the air duct from the strip-shaped air inlet and exit from the air duct. The portable air curtain machine also includes a mounting base and a fastening assembly. The mounting base includes a base plate, a first connecting plate, and a second connecting plate. The base plate is parallel to an axis of the impeller, and the first connecting plate is perpendicular to the axis. A rotating component is provided between the first connecting plate and the second connecting plate and the housing, respectively, to achieve a rotatable connection between the housing and the mounting base. The fastening assembly is disposed between the second connecting plate and a side plate near the second connecting plate. When the housing rotates relative to the mounting base, the fastening assembly is used to fix the relative position of the housing and the mounting base.

[0006] Preferably, the fastening assembly includes a spring plunger and a stepped knurled screw. The spring plunger is disposed on the second connecting plate, and the stepped knurled screw is movably disposed in an arc-shaped groove on the second connecting plate. A predetermined number of locking holes and a nut hole are provided on the side plate near the second connecting plate. The spring plunger cooperates with the locking holes to position and lock the rotational position of the housing relative to the mounting base. The stepped knurled screw cooperates with the nut hole to further fix the relative position of the housing and the mounting base.

[0007] Preferably, a vertically foldable handle is installed on the second connecting plate. The vertically foldable handle allows the entire machine to be lifted vertically. When moving, the motor is at the bottom to prevent top-heavy operation and to make the force distribution more reasonable.

[0008] Preferably, an annular rubber pad is provided between the first connecting plate and the second connecting plate and the side plate on their corresponding sides, which facilitates the rotation of the housing relative to the mounting base and reduces rotational noise.

[0009] Preferably, the portable air curtain also includes a waterproof capped plug and a switch for easy control and quick power cord replacement, making it particularly suitable for outdoor use.

[0010] Preferably, a horizontally foldable handle is installed on the casing on one side of the strip-shaped air outlet. During installation, the handle can be folded down to reduce the overall packaging height, and it can also be easily carried horizontally.

[0011] Preferably, the housing is punched with dense strip-shaped mesh to form the strip-shaped air inlet and the strip-shaped air outlet.

[0012] Preferably, the strip-shaped air inlet and the strip-shaped air outlet are of equal width and have the same gap, and the strip-shaped air inlet and the strip-shaped air outlet are equally protected, taking into account aesthetics, safety and practicality.

[0013] Preferably, the housing includes a bent edge, which cooperates with the inner sidewall of the housing to form a vortex tongue, playing a key role in air compression and noise reduction.

[0014] Preferably, an Archimedean spiral-shaped curved plate is provided inside the casing near the strip-shaped air outlet. This curved plate saves materials and reduces the weight of the casing while also serving to guide airflow.

[0015] Compared with existing technologies, the present invention has the following beneficial effects: The present invention provides a portable air curtain machine, which includes a housing and a mounting base, wherein the housing is rotatably mounted on the mounting base. The mounting base includes a base plate, a first connecting plate, and a second connecting plate, wherein the base plate is parallel to an axis of the impeller, the first connecting plate is perpendicular to the axis, and a rotating component is respectively provided between the first connecting plate and the second connecting plate and the housing to realize the rotatable connection between the housing and the mounting base. When the portable air curtain machine is installed, the base plate can be used as a base for flat installation and wall-mounted installation, and the first connecting plate can be used as a base for upright installation. At the same time, the mounting base and the housing can be positioned and locked relative to the mounting base through a fastening component, so that the direction of the strip-shaped air outlet can be adjusted. The connection method between the mounting base and the housing allows the portable air curtain machine to be wall-mounted, floor-standing, and upright installed, and with the adjustment of the direction of the strip-shaped air outlet, the installation methods of the portable air curtain machine are diversified. The mounting base is equipped with a vertically foldable handle and a horizontally foldable handle for easy carrying and movement of the entire unit. Simultaneously, the housing includes a bent edge that mates with the inner wall of the housing to form a vortex, playing a crucial role in air compression and noise reduction. An annular rubber pad is respectively installed between the first connecting plate and the second connecting plate and their corresponding side plates to facilitate housing rotation and reduce rotational noise. Attached Figure Description

[0016] Figure 1 This is an exploded view of the portable air curtain machine described in this invention;

[0017] Figure 2 This is a cross-sectional view of the portable air curtain machine described in this invention;

[0018] Figure 3 This is a schematic diagram of the vertical installation of the portable air curtain machine described in this invention;

[0019] Figure 4 This is a schematic diagram of the vertical installation and rotation of the portable air curtain machine described in this invention.

[0020] Figure 5 This is a schematic diagram of the horizontal installation of the portable air curtain machine described in this invention;

[0021] Figure 6 This is a schematic diagram of the square installation and rotation of the portable air curtain machine described in this invention. Detailed Implementation

[0022] The embodiments described below are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] See Figure 1 and Figure 2 A portable air curtain machine includes: a housing 1, an air duct 4, a motor 5, and a fan wheel 6.

[0024] The housing 1 includes a front cover plate 101, a bottom cover plate 102, and two side plates 103. The front cover plate 101 includes a snap-fit ​​straight edge, mainly used for positioning and snapping during installation. The bottom cover plate has a predetermined number of mounting holes adapted to the snap-fit ​​straight edge. The snap-fit ​​straight edge cooperates with the mounting holes to form a hollow housing body with the front cover plate 101 and the bottom cover plate 102. The impeller 6 and the motor 5 are installed inside the housing body. A side plate 103 is provided at one left end of the housing body, and another side plate 103 is provided at one right end of the housing body. The two side plates 103 are parallel to each other. A strip-shaped air inlet 2 is formed on the front cover plate 101, and a strip-shaped air outlet 3 is provided on the bottom cover plate 102 opposite to the strip-shaped air inlet 2. The arrangement of the strip-shaped air inlet 2 and the strip-shaped air outlet 3 forms a cross-flow structure with air inlet at the top and air outlet at the bottom. The strip-shaped air inlet 2 is formed by a multi-hole punched and bent structure on the cover plate 101, and the strip-shaped air outlet 3 is formed by punching and bending strip-shaped holes on the bottom panel 102. While facilitating airflow, it also provides protection, preventing fingers or other small items from accidentally entering the air duct. The strip-shaped air inlet 2 and the strip-shaped air outlet 3 are of equal width and have the same gap, ensuring equal protection for both, thus balancing aesthetics, safety, and practicality.

[0025] The air duct 4 is disposed within the housing 1, connecting the strip-shaped air inlet 2 and the strip-shaped air outlet 3. In this embodiment, a bent plate 7 is disposed inside the housing 1 at the strip-shaped air outlet 3. The bent plate 7 is firmly attached to the side plate 103 and the bottom cover plate 102 by spot welding or riveting. The bent plate 7 saves material and reduces the weight of the housing while also serving as a guide for airflow. Furthermore, the bent plate is shaped like an Archimedean spiral, making the air duct 4 resemble an Archimedean spiral worm gear, which minimizes wind resistance along the path. For ease of manufacturing, the bent plate 7 is typically made of sheet metal bending or drawn aluminum profiles. One end of the bottom cover plate 102 includes a bent edge 18 forming an air duct tongue, which plays a crucial role in compressing air and reducing noise.

[0026] The motor 5 is fixed inside the housing 1 near one of the side plates 103 by a motor mounting plate 8. The motor 5 can be selected as a DC motor or an AC motor depending on the application. A DC motor can be used in applications such as buses, trucks, and refrigerated containers where a 24V DC power supply is available, while an AC motor can be used in civilian or commercial applications.

[0027] The impeller 6 is disposed in the air duct 4, with one end connected to an output shaft of the motor 5, and the other end rotatably mounted on the inner side of the side plate 103 on the side away from the motor 5. The impeller 6 rotates with the motor 5, causing air to enter the air duct 4 through the strip-shaped air inlet 2 and be blown out through the strip-shaped air outlet 3. The impeller 6 can be made of aluminum or plastic, depending on the application.

[0028] The portable air curtain machine also includes a mounting base 9 and a fastening assembly. The mounting base 9 includes a base plate 91, a first connecting plate 92, and a second connecting plate 93, which cooperate to form a C-shaped structure. The base plate 91 is parallel to an axis of the impeller 6, and the first connecting plate 92 is perpendicular to the axis. A rotating component 10 is respectively provided between the first connecting plate 92 and the second connecting plate 93 and the housing 1 to achieve a rotatable connection between the housing and the mounting base. In this embodiment, the rotating component 10 is a locking screw 10. The fastening assembly is located between the second connecting plate 93 and a side plate 103 near the second connecting plate 93. When the housing 1 rotates relative to the mounting base 9, the fastening assembly is used to fix the relative position of the housing 1 and the mounting base 9. Furthermore, the base plate 91 can serve as a flat mounting base and a wall-mounted mounting base, and the first connecting plate 92 can serve as a standing base. Meanwhile, the fastening assembly is used to fix the relative position of the housing 1 and the mounting base 9, so that the direction of the strip-shaped air inlet and the strip-shaped air outlet can be adjusted, realizing the versatility of installation.

[0029] In this embodiment, in order to protect the motor 5, the motor 5 is located on the side close to the first connecting plate 92.

[0030] Combination Figure 3The fastening assembly includes a spring plunger 11 and a stepped knurled screw 13. The spring plunger 11 is disposed on the second connecting plate 93. A predetermined number of locking holes 12 adapted to the spring plunger 11 are provided on a side plate 103 near the second connecting plate 93. The spring plunger 11 cooperates with the locking holes 12 to position and lock the rotational position of the housing 1 relative to the mounting base 9. An arc-shaped groove 13 is provided on the second connecting plate 93. A stepped knurled screw 14 is movably disposed in the arc-shaped groove 13. A nut hole 15 adapted to the stepped knurled screw 14 is provided on a side plate 103 near the second connecting plate 93. The stepped knurled screw 14 cooperates with the nut hole 15 to lock the housing 1 and the mounting base 9 together, further tightening the rotational position of the housing 1 relative to the mounting base 9, so that the housing 1 no longer rotates around the mounting base 9, and the direction of the strip-shaped air inlet 2 and the strip-shaped air outlet 3 is adjusted.

[0031] To facilitate carrying the portable air curtain, it is equipped with a vertically foldable handle 16 and a horizontally foldable handle 17. The vertically foldable handle 16 is mounted on the second connecting plate 93, allowing the entire unit to be carried vertically with the motor 5 at the bottom to prevent top-heavy operation and ensure more reasonable force distribution. The horizontally foldable handle 17 is mounted on the cover plate 101 on one side of the strip-shaped air outlet 3. During installation, the horizontally foldable handle 17 can be folded down to reduce the overall packaging height and also facilitate horizontal carrying.

[0032] In order to facilitate the rotation of the housing 1 relative to the mounting base 9 and reduce the noise during rotation, an annular rubber pad 22 is provided between the first connecting plate 92 and the side plate 103 near it, and an annular rubber pad 22 is also provided between the second connecting plate 93 and the side plate 103 near it.

[0033] The faceplate 101 is provided with a waterproof cover-type connector 19 and a switch 20 on the side near the strip-shaped air outlet 3, which facilitates control and quick replacement of the power cord, and is especially suitable for outdoor use.

[0034] To accommodate various installation methods such as wall-mounted, floor-standing, or vertical installation, foot pads 21 are provided on both the base plate 91 and the first connecting plate.

[0035] It is also possible that the casing is a long strip with curved edges.

[0036] It is acceptable; the mounting base 9 can be a rectangular structure.

[0037] Combination Figures 4-6In use, the base plate 91 of the mounting base 9 can serve as a flat base and a wall-mounted base for flat or wall-mounted installation; the first connecting plate 92 can serve as a base for upright installation; the housing 1 can rotate freely around the mounting base 9, allowing the direction of the strip-shaped air outlet 3 to be adjusted. When adjusting the direction of the strip-shaped air inlet 2 and the strip-shaped air outlet 3, the rotational position of the housing 1 relative to the mounting base 9 is locked by the spring plunger 11, and the stepped knurled screw 14 further secures the housing 1 relative to the mounting base 9 when it rotates to that position. The connection between the mounting base 9 and the housing 1 allows the portable air curtain to be wall-mounted, floor-standing, or upright, and with the adjustment of the direction of the strip-shaped air outlet 3, it achieves diverse installation methods for the portable air curtain.

[0038] The above-disclosed embodiments are merely some preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A portable air curtain, comprising: A housing includes a housing body and two side plates respectively disposed at both ends of the housing body. The housing body is provided with a strip-shaped air inlet and a strip-shaped air outlet opposite to the strip-shaped air inlet. An air duct is disposed in the housing, and the air duct connects the strip-shaped air inlet and the strip-shaped air outlet; An electric motor, which is fixed inside the housing by a motor mounting plate; and A fan wheel is installed in the air duct, with one end connected to an output shaft of the motor and the other end rotatably mounted on a side away from the motor. The fan wheel rotates with the motor to allow air to enter the air duct from the strip-shaped air inlet and blow it out from the strip-shaped air outlet. The portable air curtain machine is characterized by the following features: it further includes a mounting base and a fastening assembly. The mounting base comprises a base plate, a first connecting plate, and a second connecting plate. The base plate is parallel to an axis of the impeller, and the first connecting plate is perpendicular to the axis. A rotating component is respectively provided between the first connecting plate and the second connecting plate and the housing to achieve a rotatable connection between the housing and the mounting base. The fastening assembly is disposed between the second connecting plate and a side plate near the second connecting plate. When the housing rotates relative to the mounting base, the fastening assembly is used to fix the housing to the mounting base. Regarding the position, the fastening assembly includes a spring plunger and a stepped knurled screw. The spring plunger is disposed on the second connecting plate, and the stepped knurled screw is movably disposed in an arc-shaped groove on the second connecting plate. A predetermined number of locking holes and a nut hole are provided on the side plate near the second connecting plate. The spring plunger cooperates with the locking holes to position and lock the rotational position of the housing relative to the mounting base. The stepped knurled screw cooperates with the nut hole to further fix the relative position of the housing and the mounting base. An Archimedean spiral-shaped bent plate is provided inside the housing near the strip-shaped air outlet.

2. The portable air curtain machine as described in claim 1, characterized in that, A vertically foldable handle is installed on the second connecting plate.

3. The portable air curtain machine as described in claim 1, characterized in that, An annular rubber pad is provided between the first connecting plate and the second connecting plate and the side plate on their corresponding side.

4. The portable air curtain machine as described in claim 1, characterized in that, The portable air curtain also includes a T-shaped connector with a waterproof cover and a switch.

5. The portable air curtain machine as described in claim 1, characterized in that, A horizontally foldable handle is installed on the casing on one side of the strip-shaped air outlet.

6. The portable air curtain machine as described in claim 1, characterized in that, The casing is punched with dense strip-shaped mesh holes, forming the strip-shaped air inlet and the strip-shaped air outlet.

7. The portable air curtain machine as described in claim 1, characterized in that, The strip-shaped air inlet and the strip-shaped air outlet have the same width and the same gap.

8. The portable air curtain machine as described in claim 1, characterized in that, The housing includes a bent edge, which cooperates with the inner sidewall of the housing to form a duct tongue.

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