Blowing apparatus and hand-held blowing apparatus with multiple air output ports

Abstract

A blow device having a secondary housing and a secondary air flow output that can be selectively engaged and disengaged. In embodiments of the disclosure, the secondary housing can include a secondary fan to generate a second high velocity air flow to supplement the bulk air flow of the primary housing. When blocked, the secondary fan is isolated from the air intake and can be driven with little power consumption. The blow device can be a backpack device or a handheld blow device. As an example, one air flow can have a relatively high volumetric flow rate relative to the other air flow, or can have a high air velocity relative to the other air flow, or can have a high energy, etc. relative to the other air flow.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 443,012, filed February 2, 2023, entitled “Blowering Device with Auxiliary Fan Housing and Auxiliary Baffle”, and U.S. Provisional Patent Application No. 63 / 525,778, filed July 10, 2023, entitled “Blowering Device with Multiple Airflow Outputs Having Different Fluid Dynamics,” each of which is incorporated herein by reference in its entirety and for all purposes.

[0003] By incorporating references

[0004] U.S. Patent 10,299,642 B2, granted May 28, 2019; U.S. Patent 10,935,039 B2, granted March 2, 2021; U.S. Patent Application 15 / 174,840, filed June 6, 2016; and U.S. Patent Application 15 / 805,465, filed November 7, 2017, are incorporated herein by reference in their entirety and for all purposes. Technical Field

[0005] The disclosed subject matter relates to devices for powered blowers, such as handheld blowers having an auxiliary fan housing and an operator-selectable auxiliary baffle. Background Technology

[0006] It is known that in many applications, such as in agriculture, when it comes to cleaning streets and sidewalks or lawns, and for other similar applications, portable blower devices are used, which are adapted to generate pressurized air jets to propel debris and loose materials in a desired direction.

[0007] In these applications, the blowing equipment may typically have a two-stroke internal combustion engine that drives a centrifugal fan impeller adapted to generate a substantially radial airflow. The fan impeller is externally surrounded by a volute manifold adapted to direct the airflow from the radial direction to a linear direction. A portion of the directed airflow is diverted from its primary purpose and directed toward the engine, which is sometimes at least partially contained within the housing, for cooling the engine itself.

[0008] While improving engine performance, the deviation of airflow from the fan impeller to the cooling system reduces the optimal yield of the airflow delivered to the pressurized air jet output from the blowing device. The proportion of airflow generated by the fan impeller is also reduced compared to the airflow directed to perform the desired task of propelling debris and loose material. Without considering power consumption, the desired air output can be achieved simply by increasing the engine size or fan impeller size and geometry to generate a larger amount of radial airflow from the fan impeller. However, this is not necessarily the preferred solution for achieving optimal yield of linear airflow when power efficiency is a concern, especially when the increased engine size or fan impeller size / geometry remains constant.

[0009] Therefore, further efforts are underway to develop a blower that can optimize linear airflow output and provide increased airflow performance, while reducing power consumption or operating with improved power efficiency. Utility Model Content

[0010] To provide a basic understanding of some aspects of this disclosure, a simplified overview is given below. This overview is not a comprehensive overview of this disclosure. It is not intended to identify key / important elements or to depict the scope of this disclosure. Its sole purpose is to present some concepts of this disclosure in a simplified form as a prelude to the more detailed description that follows.

[0011] Various embodiments of this disclosure provide a blower having an auxiliary housing and an auxiliary airflow outlet, which can be engaged when additional airflow performance is required and blocked when not needed to reduce power consumption. In some embodiments, the blower may be powered by a motor and a rechargeable battery, but this disclosure is not limited to such embodiments. In various aspects of the disclosed embodiments, the auxiliary housing may include an auxiliary fan to generate a second radial airflow converted into a second linear airflow by the auxiliary airflow outlet. When blocked, the auxiliary fan is shut off from air intake and can be driven with minimal power consumption. When unblocked, the auxiliary fan receives air from outside the blower and generates a second linear airflow. In certain aspects of the disclosed embodiments, the auxiliary airflow outlet may be configured to provide a high-speed and high-pressure output from the blower, which may supplement the large-volume airflow output generated by the main fan and main airflow outlet of the blower. Thus, the disclosed blower can provide a large-volume main output at all times and a high-speed and high-pressure output only when the operator selects. When not needed, the optional baffle can be turned off to minimize air resistance to the auxiliary fan and its power consumption.

[0012] Embodiments of this disclosure provide a blower device with dual output shafts. Some embodiments include backpack blowers, while others include handheld blowers. The dual output shafts can output their respective airflows. Furthermore, the airflows can have different fluid flow characteristics. For example, one airflow may have a relatively high volumetric flow rate relative to another, or a high air velocity relative to another, or high energy relative to another, or suitable combinations thereof. In some backpack blowers, an armature having at least one axis of rotation can secure the fan housing and output shafts to the fan body to facilitate changing the position, orientation, or both of the fan housing and output shafts. In some embodiments, the dual output shafts can be fluidly coupled to a respective fan housing that surrounds and fluidly communicates with a respective fan generating a corresponding airflow. In other embodiments, the dual output shafts can be fluidly coupled to the interior of a respective fan housing that surrounds and fluidly communicates with a respective side of a dual-sided fan generating a corresponding airflow. In another embodiment, a fan housing in a set of fan housings may have selectively blocked inlets to suppress or shut off one of a set of multiple airflows. In some embodiments, an airflow coupling with a selective diverter valve may be provided between the first output shaft and the second output shaft, the selective diverter valve selectively diverting one airflow from the first output shaft to the second output shaft for combination with another airflow within the second output shaft.

[0013] In one aspect of the disclosed embodiments, a blower device is disclosed, which may include a fan coupled to a drive mechanism defining a rotation axis of the fan, and may include a fan housing surrounding the fan and defining a space in which the fan rotates in response to a rotational force applied to the drive mechanism. Furthermore, the blower device may include a motor coupled to the drive mechanism that generates and applies a rotational force to the drive mechanism, causing the fan to rotate within the fan housing. An air inlet is defined at the surface of the fan housing for receiving air from outside the blower device into the fan housing, the air interacting with the fan, wherein the rotation of the fan within the fan housing while in communication with the air generates first pressurized air, and a first output portion fluidly connected to the fan housing receives the first pressurized air and directs it to a first blower exhaust port. Additionally, the blower may include a second fan housing and a second air inlet defined adjacent to the second fan housing. The second air inlet has a variable baffle opening adjustable between an open position and a closed position, wherein, in response to the variable baffle opening being in the open position, second external air is received from outside the blower into the second fan housing, and in response to the variable baffle opening being in the closed position, the second external air is prevented from entering the second fan housing. Furthermore, the blower may include a second output section fluidly connected to the second fan housing, receiving second pressurized air generated within the second fan housing in response to a rotational force applied to a drive mechanism and in response to the variable baffle opening being in the open position, wherein the second output section directs the second pressurized air to a second blower exhaust port.

[0014] For example, the hair dryer is a handheld hair dryer, and the motor is an electric motor powered by a rechargeable battery attached to the handheld hair dryer.

[0015] For example, in the position held by the operator, the first blower exhaust port has a fixed position oriented above the second blower exhaust port, such that the first pressurized air is guided outward from the blower above the second pressurized air.

[0016] For example, the first output section or the second output section is formed of a rigid material, which respectively defines a fixed first blower exhaust port or a fixed second blower exhaust port.

[0017] For example, the blower is characterized in that: the first output section and the first blower exhaust port define a wide output path and a wide output opening relative to the second blower exhaust port, the wide output path and wide output opening facilitating the output of a large volume of air from the blower using the first pressurized air; or the second output section and the second blower exhaust port define a narrow output opening relative to the first blower exhaust port, the narrow output opening facilitating the output of high-speed air from the blower using second pressurized air, and in response to the variable baffle opening being in an open position, the blower generates a large volume of air output from the wide output opening of the first blower exhaust port and generates high-speed air output from the narrow output opening of the second blower exhaust port.

[0018] For example, a blower device is characterized by at least one of the following: a first output portion is fluidly connected to the fan housing at a top portion of the fan housing, and wherein the first blower exhaust port is guided downward from the top portion of the fan housing as the first blower exhaust portion extends away from the fan housing; a second output portion is fluidly connected to the second fan housing at a top portion of the second fan housing, and wherein the second blower exhaust port is guided downward from the top portion of the second fan housing as the second blower exhaust portion extends away from the second fan housing; or the first output portion is fluidly connected to the fan housing at a bottom portion of the fan housing, and wherein the second output portion is fluidly connected to the second fan housing at a bottom portion of the second fan housing.

[0019] For example, the blower also includes a second fan coupled to the drive mechanism and enclosed within a second fan housing, wherein the second fan rotates in response to a rotational force applied to the drive mechanism by the motor, and wherein, in response to the variable baffle opening being in an open position, second external air is received within the second fan housing and communicates with the second fan during rotation to generate second pressurized air within the second fan housing, and wherein a second air inlet is located between the fan housing and the second fan housing, and wherein the drive mechanism extends from the motor to the second fan within the second fan housing, through the second air inlet and extending to the fan within the fan housing.

[0020] For example, the second fan housing is adjacent to the first fan housing; the fan is positioned at the intersection of the first fan housing and the second fan housing; a first surface of the fan defines a first fan mode that rotates within the fan housing in response to a rotational force applied to the drive mechanism and communicates with the air to generate the first pressurized air; and a second surface of the fan defines a second fan mode that rotates within the second fan housing in response to a rotational force applied to the drive mechanism and communicates with a second external air to generate a second pressurized air in response to a variable baffle opening being in an open position.

[0021] For example, the second air inlet is located on the surface of the second fan housing adjacent to the motor, the separator surface is shared by the fan housing and the second fan housing, and the air inlet is located on the far side surface of the fan housing relative to the separator surface.

[0022] For example, the blower also includes an air intake actuator that allows the operator to control the opening of the variable baffle and the physical transition between the open and closed positions.

[0023] In another aspect of the disclosed embodiments, a handheld hair dryer with multiple air output ports is provided. The handheld hair dryer may include a first output port having a first output surface area and a second output port having a second output surface area, wherein the second output surface area is smaller than the first output surface area. In addition to the above, the handheld hair dryer may include a first housing coupled to the first output port and physically isolated from the second output port, a second housing coupled to the second output port and physically isolated from the first output port, and may include a motor that provides mechanical power to the first housing or the second housing or both. Furthermore, the handheld hair dryer may include an air pressurizing device that responds to the mechanical power output by the motor and is configured to generate first pressurized air within the first housing and discharge it from the first housing via the first output port, and is configured to conditionally generate second pressurized air within the second housing and discharge it via the second output port.

[0024] For example, the handheld hair dryer also includes an adjustable air intake baffle that defines at least a portion of the surface of the second housing and is configured to adjust between an open position and a closed position, wherein the air pressurizing device generates the second pressurized air within the second housing in response to the adjustable air intake baffle being adjusted to the open position.

[0025] For example, the air pressurization device includes a first fan located within the first housing to generate a first pressurized air and a second fan located within the second housing to conditionally generate a second pressurized air.

[0026] For example, the air pressurization device includes a fan having a first fan surface and a second fan surface, wherein the first fan surface is exposed to the first housing and communicates with air supplied by an air inlet of the first housing to generate first pressurized air, and wherein the second fan surface is exposed to the second housing to conditionally generate second pressurized air.

[0027] For example, a handheld hair dryer also includes a rechargeable battery for supplying power to the motor, wherein the motor is an electric motor.

[0028] In an embodiment, this disclosure provides a hair dryer. The hair dryer may include a body defining a rigid structure and may include one or more straps attached to the body, the straps being configured to secure the hair dryer to an operator. Furthermore, the hair dryer may include a motor generating mechanical power, a hair dryer housing, and a hair dryer fan, the hair dryer fan being housed within the hair dryer housing and powered by the motor to generate air pressure within the hair dryer housing. The hair dryer may also include an output shaft having an input portion fluidly coupled to the hair dryer housing and an inclined portion for guiding an airflow in response to the generation of air pressure within the hair dryer housing, and may include a second output shaft adjacent to the output shaft, the second output shaft having an input portion fluidly coupled to the hair dryer housing or coupled to an input portion of a second hair dryer housing adjacent to the hair dryer housing, wherein the second output shaft has a second inclined portion for guiding a second airflow from or from the hair dryer housing. Furthermore, the hair dryer may include a support arm fixed to the hair dryer housing at a first support connector and fixed to the body of the hair dryer at a second support connector to support the weight of the hair dryer housing, the output shaft and the second output shaft at a distance from the body of the hair dryer, and the support arm has at least one axis of rotation to adjust the orientation or position of the hair dryer housing, the output shaft and the second output shaft.

[0029] In one or more additional embodiments of this disclosure, a hair dryer is provided, configured to be removably attached to an operator's torso. The hair dryer may include a body providing a rigid support structure and a shoulder strap assembly coupled to the body of the hair dryer and configured to removably attach the body to the operator's torso. Additionally, the hair dryer may include a fan housing and a motor. The fan housing is connected to the body and surrounds a fan coupled to a drive mechanism and defines a first fan housing output. The motor has a motor output connected to the drive mechanism, wherein the motor generates mechanical power at the motor output to drive the rotation of the fan. Furthermore, the hair dryer may include an airflow output defining an inlet port coupled to the fan housing output and directing airflow generated in response to the rotation of the fan within the fan housing along the length of the airflow output to a first output port. It may also include a second airflow output defining a second inlet port coupled to a second fan housing output and directing a second airflow from the second fan housing output along the length of the second airflow output to a second output port. In various embodiments, the second airflow defines at least one of a different volumetric flow rate or a different airflow velocity than the airflow.

[0030] Another embodiment of this disclosure provides a blower device. The blower device may include a motor having a motor output that generates mechanical power. The blower device may include a fan housing and a second fan housing, the fan housing surrounding a fan coupled to the motor output and defining a first fan housing output, and the second fan housing defining a second fan housing output. Furthermore, the blower device may include an airflow output shaft defining an air inlet port fluidly coupled to the first fan housing output port and guiding airflow generated in response to fan rotation within the fan housing along the length of the airflow output port to the first output port, and may also include a second airflow output shaft defining a second air inlet port fluidly coupled to the second fan housing output port and receiving a second airflow generated within the second fan housing from the second fan housing output port. In addition to the above, the blower device may include an air output coupling connecting the second airflow output shaft to the airflow output shaft. In various embodiments, the blower device may also include an optional diverter valve located at least at the intersection of the air output coupling and the second airflow output shaft having a first orientation and a second orientation. In some embodiments, in a first orientation, a selectable diverter valve directs a second airflow from the second fan housing output to a second output port defined by a second airflow output shaft. In another embodiment, in a second orientation, a selectable diverter valve directs the second airflow from the second fan housing output through an air output connector into the airflow output shaft and exits the first output port together with the airflow.

[0031] To achieve the foregoing and related objectives, certain illustrative aspects of this disclosure have been described herein in conjunction with the following description and accompanying drawings. However, these aspects indicate only a few of the various ways in which the principles of this disclosure may be employed, and this disclosure is intended to include all such aspects and their equivalents. Other advantages and features of this disclosure will become apparent when considered in conjunction with the accompanying drawings, based on the following detailed description. Attached Figure Description

[0032] Figure 1 Exemplary multi-output portable hair dryer devices according to various aspects of this disclosure are shown.

[0033] Figure 2 A view of a multi-output portable blower with a transparent fan housing, according to aspects of this disclosure, is shown.

[0034] Figure 3 A view of a multi-output portable blower with a transparent main housing, according to other aspects disclosed herein, is depicted.

[0035] Figure 4 A rear view of a multi-output portable blower with a transparent fan housing is shown, representing one or more aspects of the disclosed embodiments.

[0036] Figure 5 An example diagram of a multi-output portable blower is depicted, along with a representation of the corresponding large volume and high-speed air output.

[0037] Figure 6 An exemplary multi-output portable hair dryer is shown according to other aspects of the disclosed embodiments.

[0038] Figure 7 It shows Figure 6 Rear perspective view of a multi-output portable hair dryer.

[0039] Figure 8A and 8B An example illustration depicts the selectable activation and deactivation of the high-speed air output of the blower disclosed in a further disclosed aspect.

[0040] Figure 9 A block diagram of an example multi-output blower device according to further aspects of the disclosed embodiments is depicted.

[0041] Figure 10 An exemplary multi-output backpack blower device according to aspects of this disclosure is described.

[0042] Figure 11 A multi-output backpack blower with an axial fan and a centrifugal fan is shown according to aspects of this disclosure.

[0043] Figure 12 An example backpack hair dryer with a dual-handed universal output platform is described according to other aspects disclosed herein.

[0044] Figure 13 A multi-output hair dryer platform with centrifugal and axial fans is shown in other aspects of the disclosed embodiments for a backpack or portable hair dryer.

[0045] Figure 14 An exemplary multi-output portable blower and a rotatable linkage device for changing the orientation of the multi-output airflow output are shown.

[0046] Figure 15 An exemplary multi-output portable blower with a vertically arranged dual centrifugal fan housing is shown, according to other aspects.

[0047] Figure 16 An exemplary multi-output portable blower with a horizontally arranged dual centrifugal fan housing is shown in another aspect.

[0048] Figure 17 An exemplary portable multi-output hair dryer with a rotatable fan housing and airflow output is depicted in the additional disclosure.

[0049] Figure 18 An example multi-output blower with a diverter valve is described according to some aspects of the disclosed embodiments.

[0050] Figure 19 An exemplary multi-output blower is shown, in other respects, having a diversion valve and a single fan housing, as well as a fan with dual internal sections.

[0051] Figure 20 An example backpack multi-output blower with a dual axial flow fan housing and an optional diverter valve is depicted in other aspects of this disclosure.

[0052] It should be noted that the accompanying drawings are schematic and not drawn to scale. For clarity and convenience in the drawings, the relative dimensions and proportions of the parts have been enlarged or reduced. The same reference numerals are generally used to refer to corresponding or similar features in different embodiments, unless it is clear from the context that the same reference numerals refer to different features. Therefore, the drawings and descriptions are to be considered illustrative rather than restrictive in nature.

[0053] While embodiments of the present disclosure relating to machine vision systems for power equipment are described herein, it should be understood that the disclosed machines, electronic and computing devices, and methods are not limited thereto and can be modified without departing from the scope of the present disclosure. The scope of systems, methods, and electronic and computing devices for machine vision equipment is defined by the appended claims, and all devices, processes, and methods that literally or equivalently fall within the meaning of the claims are intended to be included therein. Detailed Implementation

[0054] As used herein, the term “substantially” and other relative terms or degree terms (e.g., about, approximately, substantially, close to, etc.) are intended to have the meaning explicitly specified in connection with their use herein, or the meaning that a person skilled in the art could reasonably infer, or the reasonable variation in a specified quality or quantity that a person skilled in the art would understand by reference to the entire specification (including the knowledge of a person skilled in the art and the material incorporated herein by reference). As an example, a degree term may refer to a reasonable manufacturing tolerance, with respect to which a specified quality or quantity can be achieved using manufacturing equipment. Thus, as a specific illustration, although not limiting, for an element of a device explicitly identified as having a dimension of about 50 centimeters (cm), the relative term “about” may indicate a reasonable variation of about 50 cm, with the specified dimension of the element to be expected by a person skilled in the art to be achievable using commercial manufacturing equipment, industrial manufacturing equipment, laboratory manufacturing equipment, etc., and is not limited to a mathematically precise quantity (or mass). In other examples, where a person skilled in the art is suited to implement the described function or feature of the element disclosed herein, a degree term may mean a variation of + / - 0-3%, + / - 0-5%, or + / - 0-10% of an explicitly stated value. In other examples, the term "degree" may refer to any suitable variation in quality or quantity suitable for implementing the explicitly disclosed function or feature of the disclosed element. Therefore, this specification is by no means limited to the specific quality and quantity disclosed herein, but includes all variations of the specified quality or quantity reasonably conveyed to a person skilled in the art through the context of this disclosure.

[0055] Figure 1 An exemplary multi-output portable hair dryer 100 according to various aspects of this disclosure is shown. The hair dryer 100 includes a motor 140 and a base 150 fixed to a housing. An operator handle 105 provides an operator with control points for raising and holding the hair dryer 100, and provides a trigger to start or stop the motor 140. The base 150 provides a support structure for the hair dryer 100, thereby allowing it to be placed on the ground in a manner suitable for the structural and operational integrity of the hair dryer 100.

[0056] As shown in the figure, the blower device 100 may include a large-volume output section 110 (also referred to as a high cubic feet per meter (CFM) output section) fixed to the housing, and a selectively activated high-speed output section 130 (also referred to as a miles per hour (MPH) output section) fixed to the housing. An MPH intake actuator 120 allows the operator to selectively activate or deactivate the selectively activated high-speed output section 130 (see, for example, below). Figure 8A and 8B When activated, the selectively activated high-speed output section 130 can provide a high-speed pressurized airflow at the high-speed exhaust port 132 to supplement the large-volume pressurized airflow at the large-volume exhaust port 112. The high-speed pressurized airflow can provide additional pressure to help the large-volume pressurized airflow move debris, dirt, leaves, grass, and vegetation trimmings on the surface in front of the blower 100. Activation of the selectively activated high-speed output section 130 results in high power consumption at the motor 140 to achieve increased air output. However, when deactivated, the selectively activated high-speed output section 130 can be stopped, thereby restoring the normal (e.g., lower) power consumption of the motor 140. In at least some embodiments, the motor 140 can be an electric motor powered by a power source, which can be a direct current (DC) power source (e.g., a rechargeable battery) or an alternating current (AC) power source (e.g., a wire connected to a fixed AC power source (such as an AC socket)). However, this disclosure is not limited thereto, and in other embodiments, the motor 140 can be an internal combustion engine, a hydraulic motor, a pneumatic motor, etc.

[0057] The large-volume exhaust port 112 may have a first surface area, and the high-speed exhaust port 132 may have a second surface area. In various aspects of the disclosed embodiments, the second surface area may be smaller than the first surface area. Furthermore, the interface between the selectively activated high-speed output section 130 and the housing of the blowing device 100 may have the same or similar surface area as the interface between the large-volume output section 110 and the housing. Therefore, when the selectively activated high-speed output section 130 extends from the housing to the high-speed exhaust port 132, its surface area may be significantly narrower than the transition from the housing to the large-volume exhaust port 112 of the large-volume output section 110.

[0058] Figure 2An exemplary multi-output portable hair dryer 100 is depicted, wherein portions of the housing are made transparent to reveal the interior of the housing. Specifically, the housing includes a CFM housing 214 and an MP housing 234, as shown. The CFM housing 214 may include a CFM fan 212 and a CFM air inlet 218. The CFM air inlet 218 defines an opening or partial opening in the CFM housing 214 to supply air from outside the hair dryer 100 into the CFM housing 214 to communicate with the CFM fan 212. When the CFM fan 212 rotates in response to the mechanical power output from the motor 140, the CFM fan 212 can generate pressurized air within the CFM housing 214 to be output to the mass output section 110 via the CFM housing outlet 216. This is achieved through the mass exhaust port 112 (e.g., see above). Figure 1 It generates a large volume of pressurized airflow output from the blower 100.

[0059] In various aspects of the disclosed embodiments, the CFM housing 214 may be partially or completely isolated from the MPH housing 234. This mitigates or prevents air received by the CFM inlet 218 from entering the MPH housing 234. Conversely, the blower 100 may include an MPH inlet having an adjustable baffle 222 responsive to the MPH inlet actuator 120. When the MPH inlet actuator 120 is in the closed position, such as Figure 2 As shown, the MPH housing 234 is isolated from the outside air, thereby allowing the MPH fan 232 to rotate within the MPH housing 234 with minimal air resistance. This minimizes the power consumption associated with the rotation of the MPH fan 232 when a high-speed pressurized airflow from the high-speed exhaust port 132 is not desired (see, for example, below). Figure 8B When a high-speed, pressurized airflow is desired, the MPH intake actuator 120 can be adjusted to an open position, which utilizes an adjustable baffle 222 to open a baffle surface in the MPH intake. The opened baffle surface (see, for example, below) Figure 3 Additional air from outside the blower 100 is received into the MPH inlet via the adjustable baffle 222 and MP housing 234. This additional air communicates with the MPH fan 232, which can generate additional pressurized air within the MPH housing 234 to be output through the MPH housing outlet 236 to the selectively activated high-speed output section 130. This creates a high-speed pressurized airflow output from the blower through the high-speed exhaust port 132.

[0060] like Figure 2As shown, the MPH intake with adjustable baffle 222 is located between CFM housing 214 and MPH housing 234. Additionally, motor 140 is shown on the left side of MPH housing 234. Other arrangements can be implemented according to various aspects of the disclosed embodiments. For example, CFM housing 214 may be oriented interchangeably with MPH housing 234, such that CFM housing 214 is adjacent to motor 140, as an alternative. In the latter alternative, CFM intake 218 may be located between CFM housing 214 and motor 140, or the adjustable baffle 222 may replace the MPH intake. In the latter case, the MPH intake with adjustable baffle 222 may be located on the right side of MPH housing 234 (MPH housing 234 interchanges with CFM housing 214). In yet another embodiment, the MPH intake with adjustable baffle 222 may be located on the left side of MPH housing 234 between motor 140 and MPH housing 234. In this embodiment, the CFM air inlet 218 may be located between the MPH housing 234 and the CFM housing 214, or the MPH housing 234 may be adjacent to the CFM housing 214, wherein the CFM air inlet 218 is located on the right side of the CFM housing 214, as shown in the figure.

[0061] from Figure 2 As can be clearly seen, the CFM housing outlet 216 connects the large-volume output section 110 to the CFM housing 214 at the upper part of the CFM housing 214. Similarly, the MPH housing outlet 236 connects the selectively activated high-speed output section 130 to the MPH housing 234 at the upper part of the MPH housing 234. This arrangement can be modified in different aspects of the disclosed embodiments without departing from the scope of this disclosure. For example, the CFM housing outlet 216 may be connected to the CFM housing outlet 216 at the middle or lower part of the CFM housing outlet 216. Alternatively, the MPH housing outlet 236 may connect the selectively activated high-speed output section 130 to the middle portion or the lower part of the MPH housing 234. In at least some of the disclosed embodiments, both the CFM housing outlet 216 and the MPH housing outlet 236 can respectively connect the bulk output section 110 and the selectively activated high-speed output section 130 to the lower portions of the CFM housing 214 and the MPH housing 234 (see, for example, below). Figure 6 ).

[0062] Figure 3 A rear view of a blower device 100 according to other aspects of the disclosed embodiments is shown. Figure 3As shown, the CFM housing 214 is transparent to reveal the CFM fan 212 and MPH fan 232 connected to the motor driver 342. In one or more aspects of the disclosed embodiments, the motor driver 342 may be a drive shaft fixed to the motor 140, which rotates in response to mechanical power output from the motor 140. The motor driver 342 may also be fixed to the MPH fan 232 and CFM fan 212 to rotate the MPH fan 232 and CFM fan 212 in response to the mechanical power of the motor 140.

[0063] As described herein, the rotation of the CFM fan 212 receives external air through the CFM inlet 218 and generates pressurized air within the CFM housing 214. The rotation of the MPH fan 232 can conditionally generate pressurized air within the MPH housing 234. The MPH inlet with adjustable baffle 222 shares an opening with the MPH housing 234, allowing free exchange of air between the interior of the MPH housing 234 and the interior of the MPH inlet with adjustable baffle 222. Therefore, in the open position, one or more baffle openings 322 expose the interior of the MPH inlet with adjustable baffle 222 and the MPH fan 232 within the MPH housing 234 to air outside the blower 100. This allows external air to communicate with the rotating MPH fan 232 to generate a second pressurized air. With the MPH inlet closed and the adjustable baffle 222 closed, the baffle opening 322... Figure 2 The device is closed as shown, thereby preventing external air from entering the MPH housing 234.

[0064] In one or more aspects of the disclosed embodiments, motor 140 is connected to an air pressurization device disposed within CFM housing 214 and MPH housing 234. In some aspects, the air pressurization device includes a CFM fan 212, an MPH fan 232, and a motor driver 342, but this disclosure is not limited thereto. For example, the air pressurization device may include a bladeless fan comprising a multi-disc flat turbine, such as a Tesla turbine. Furthermore, the air pressurization device may include a suitable electric or mechanical air pump (e.g., a vane pump, reciprocating pump, piston pump, impeller pump, diaphragm pump, etc.), a hydraulic air pump, a pneumatic air pump, a vacuum pump, or other suitable air pressurization mechanism located partly within CFM housing 214 and partly within MPH housing 234. Within CFM housing 214, the air pressurization device continuously supplies external air through CFM inlet 218. Within the MPH housing 234, the air pressurization device has a conditional supply of external air through the baffle opening 322 of the MPH air inlet, which has an adjustable baffle 222 (when open).

[0065] Figure 4A rear motor side view of the blower 100 is shown. The blower 100 is depicted as having a base 150 resting on a flat surface (such as the ground). The motor 140 is fixed to the MPH housing 234 above the base 150. An operator handle 105 is fixed to the top surface of the MPH housing 234 and has an operator trigger to start and stop the motor 140. The interior portion of the MPH housing 234 is made transparent, thereby allowing the motor driver 342 to be seen within the MPH inlet, where an adjustable baffle 222 is located between the MPH housing 234 and the CFM housing 214. The MPH inlet with the adjustable baffle 222 is also shown as having a covered baffle opening 422, thereby preventing (significant) outside air from entering the MPT inlet with the adjustable baffle 22 and the MPH housing 234, as described herein. Activation of the MPH intake actuator 120 can be used to close and shut off the adjustable baffle (as shown by the covered baffle opening 422), and can be used to open the adjustable baffle (as shown by the baffle opening 322), or any suitable portion thereof.

[0066] Figure 5 An example airflow diagram 500 of a blower device 100 in one or more aspects of the disclosed embodiments is shown. A large-volume airflow 510 is a relatively wide airflow used to move a large volume of air from the blower device 100 through a large-volume output section 110. The large-volume airflow 510 can effectively move a large volume of lightweight debris rapidly in front of the blower device 100. A high-speed airflow 530 (when activated) can have a relatively narrow (higher) pressurized airflow to effectively move heavier (e.g., wet) or compressed debris from in front of the blower device 100. Furthermore, the high-speed output 530 can be directed to lift debris from a surface into the large-volume airflow 510 so that it is blown out in front of the blower device 100 without surface friction. Therefore, the high-speed output 530 can supplement the debris removal effect of the blower device 100.

[0067] Figure 6 Alternative examples of multi-output hair dryers 600 according to other aspects of the disclosed embodiments are shown. The hair dryer 600 may include an operator handle 605 and an air inlet 618 on a proximal surface of a housing 614. In one embodiment, a motor (not shown, but see below) Figure 7 It can be located on the side of the inlet 618, or on the back of the housing 614, therefore in Figure 6 Not visible in the middle. The motor can engage an air pressurization device contained within the housing 614 (e.g., as described above in...). Figure 3 As described in [the document], pressurized airflow is provided through a large-volume output section 610, a selectively activated high-speed output section 630, or both.

[0068] The bulk output section 610 intersects the housing 614 at its bottom 612. Similarly, the selectively activated high-speed output section 630 may intersect the housing 614 at another bottom 632. Although the bulk output section 610 intersects the housing 614 at the bottom 612 shown at the rear of the housing 614, and the selectively activated high-speed output section 630 intersects the housing 614 at the bottom 632 shown at the front of the housing 614, this orientation can be reversed, with the selectively activated high-speed output section 630 intersecting the housing 614 at the bottom 612 at the rear of the housing 614, and so on. For example, in at least some of the disclosed aspects, the selectively activated high-speed output section 630 may be located on the same side of the housing 614 as the motor of the blower device 600.

[0069] In one or more embodiments, the air inlet 618 may be an adjustable baffle air inlet (although in...) Figure 6 (Not depicted as such in the original text), it is configured to open and close in a manner suitable for selectively supplying or selectively removing external air from the selectively activated high-speed output 630. In such embodiments, the air inlet 618 may have a radially adjustable baffle that opens and closes rotatably about a center of rotation coinciding with the center of the air inlet 618. Such a radially adjustable baffle may be embodied by a multi-piece door in the form of a ladybug closure, two (or more) generally semicircular plates that can be rotatably separated or together, a rotating variable disk defining a radial slot, a set of rotating aperture plates, or other suitable arrangements to allow airflow from fully open (e.g., 100%) to fully closed (e.g., 0%) into the air inlet 618 (e.g., see U.S. Patent No. 10,299,642 B2, which is incorporated herein by reference). In other embodiments, the air inlet 618 may have a translational baffle having one or more openings that translate together to a closed position or separately to an open position. Other suitable arrangements known in the art or reasonably conveyed to a person of ordinary skill in the art are considered to be within the scope of this disclosure.

[0070] Figure 7 A rear view of a blower device 600 according to other aspects of the disclosed embodiment is shown, the blower device 600 having a base 750 resting on a flat surface. The housing 614 is shown as including an MPH housing 734 and a CFM housing 724 separated by an operator handle 605, and optionally includes an MPH air inlet having an adjustable baffle therebetween (e.g., as described above). Figures 2 to 4 (As shown). The MPH intake actuator 720 is operable to open and close the MPH intake port using an adjustable baffle as described herein. Figure 7In the depicted embodiment, the MPH housing 734 is fluidly coupled to a selectively activated high-speed output section 630 at the bottom of the MPH housing 734. Similarly, the CFM housing 724 may be fluidly coupled to the bulk output section 610 at the bottom of the CFM housing 724 or at the middle or central portion of the CFM housing 724. The motor 740 is fixed to the outer surface of the MPH housing 734, but in other aspects of the disclosed embodiments, the motor 740 may be moved to different locations (e.g., on the outer surface of the CFM housing 724, or other suitable locations).

[0071] As described herein, the air pressurization device may be distributed within the CFM housing 724 and the MPH housing 734. A coupling may connect the motor 740 to the air pressurization device. In some embodiments, the coupling may be a drive shaft. In other embodiments, the coupling may be one or more hydraulic lines, one or more pneumatic pressure lines, one or more belt or pulley actuators, one or more gear couplings, one or more piston couplings, or suitable combinations thereof.

[0072] Figure 8A and 8B An example airflow diagram of a blower device 600 is depicted. Figure 8A The MPH intake actuator 720 in the closed position 820A is depicted. In the closed position 820A, the adjustable baffle supplying airflow to the MPH housing 734 is closed, thereby preventing airflow through the selectively activated high-speed output section 630. As a result, the blowing device 600 only produces... Figure 8A The large volume airflow 810A in the middle.

[0073] In comparison, Figure 8B The MPH intake actuator 720 in the open position 820B is shown. In the open position 820B, the adjustable baffle supplying airflow to the MPH housing 734 is open, facilitating the air pressurization device within the MPH housing 734 to generate a high-speed output 830B via the selectively activated high-speed output section 630, as shown. The high-speed output 830B is provided together with a large-volume airflow 810B, as... Figure 8B As shown.

[0074] Figure 9An alternative exemplary multi-output portable hair dryer 900 according to further aspects of the disclosed embodiments is shown. The hair dryer 900 includes a housing 920 coupled to a motor 960 and a dual-sided fan 940 rotatably fixed within the housing 920. The CFM side 942 of the dual-sided fan 940 is exposed to a first portion of the housing 920, and the MPH side 944 of the dual-sided fan 940 is exposed to a second portion of the housing 920, wherein a separator 944 (and the dual-sided fan 940) isolates the first portion of the housing 920 from the second portion of the housing 920. An MPH inlet 950 can be selectively opened and closed in response to actuation and de-actuation of an operator-controlled inlet valve 954, respectively. The MPH inlet 950 can selectively provide or prevent outside air from entering the MPH side 944 of the dual-sided fan 940 and the second portion of the housing 920. Separately, the CFM inlet 954 can provide outside air to the CFM side 942 of the dual-sided fan 940 and the first portion of the housing 920. External air received in the first portion of housing 920 is connected to CFM side 942, where pressurized air is generated to provide a large-volume pressurized airflow through large-volume output section 930. When MPH inlet 950 is selectively opened, external air can also be received in the second portion of housing 920 to communicate with MPH side 944, where a second pressurized air is generated to provide a high-speed pressurized airflow through high-speed output section 910. However, when MPH inlet 950 is selectively closed, external air communicated with MPH side 944 is not received, and high-speed output section 910 has little or no airflow.

[0075] In one or more embodiments, the CFM side 942 of the dual-sided fan 940 may have a first groove pattern on its first surface exposed to the first portion of the housing 920 to generate first pressurized air within the second portion of the housing 920. Similarly, the MPH side 944 of the dual-sided fan 940 may have a second groove pattern on its second surface exposed to the second portion of the housing 920 to generate second pressurized air within the second portion of the housing 920. The groove pattern may vary depending on the length, depth, curvature, or spacing of the circumference of the dual-sided fan 940, or a suitable combination thereof. (See, for example, U.S. Patent No. 10,935,039 B2, incorporated herein by reference).

[0076] Figure 10An exemplary multi-output backpack hair dryer 1000 is depicted according to various aspects of the disclosed embodiments. The hair dryer 1000 includes a body and a support member 1010, which define a rigid or at least partially rigid structure for the hair dryer 1000. The body and support member 1010 can be configured to be comfortably secured to the operator's torso, either as a back support at the operator's back or as an abdominal support at the operator's front. Various pads can be attached to the outer surface of the body and support member 1010 to promote comfort.

[0077] The body and support 1010 may define a partially hollow internal portion (not shown) that may house a power source or fuel supply. Example power sources may include one or more batteries, a hydraulic motor, a pneumatic pump, etc. Example fuel supplies may include gasoline canisters, diesel canisters, propane canisters, natural gas canisters, etc. In some embodiments, the partially hollow internal portion may also house an electric motor, an internal combustion engine, etc. In other embodiments, some or all of the power source, fuel supply, electric motor, or internal combustion engine may be fixed to the exterior of the body and support 1010 rather than contained therein, and in other embodiments, some or all of the power source, fuel supply, electric motor, or internal combustion engine may alternatively be fixed to a separate component of the blower 1000 (e.g., fixed to a fan housing, see below).

[0078] The hair dryer 1000 also includes a shoulder strap assembly 1050 attached to the body and support member 1010. The shoulder strap assembly 1050 may include one or more arm straps (e.g., two arm straps) secured around the operator's shoulders and arms. In some aspects, the shoulder strap assembly 1050 may be configured to be secured from the back, as depicted around the front of the operator. In other aspects, the shoulder strap assembly 1050 may be configured to be secured from the front to the operator's back. In a further aspect, the shoulder strap assembly 1050 may include one or more shoulder straps for securing around the operator's waist (e.g., see below). Figure 15 (Strap 1560). According to various aspects of the disclosed embodiments, various types of buckles, hooks, wire harnesses, straps, connectors, disconnect switches, ropes, cords, padding, etc., or suitable combinations thereof, can be used in the shoulder strap assembly 1050.

[0079] The hair dryer 1000 may also include a support arm 1015 and a hair dryer assembly 1020. The support arm 1015 may be secured to the body and support member 1010 at a first support coupling 1016 and to the hair dryer assembly 1020 at a second support coupling 1017. The support arm 1015 may be a rigid or substantially rigid structure adapted to support the mass of the hair dryer assembly 1020 at a fixed relative height with respect to the body and support member 1010, and optionally at a fixed distance from the body and support member 1010. Although the first support coupling 1016 is shown as being secured to the bottom of the body and support member 1010, this is merely an illustrative example, and in other aspects of this disclosure, the first support coupling 1016 may be secured to the body and support member 1010 at another suitable location or at multiple locations (e.g., via multiple first support couplings 1016). Similarly, the second support connector 1017 is shown fixed to the distal side of the hair dryer assembly 1020 and near the intersection of the two fan housings 1022. However, the second support connector 1017 may alternatively be fixed at different locations on the hair dryer assembly 1020 or at multiple locations on the hair dryer assembly 1020 (e.g., by multiple second support connectors 1017).

[0080] In addition to the above, the support arm 1015 may include multiple axes of rotation. In one or more aspects of the disclosed embodiments, the support arm 1015 may include rotation axis A 1060, rotation axis B 1062, and rotation axis C 1064 (collectively referred to below as rotation axes 1060 to 1064). However, the disclosed embodiments are not limited to this aspect, and in other aspects, the support arm 1015 may implement more or fewer axes of rotation and [other related technologies / mechanisms]. Figure 10 The figure shows rotation axes in different positions. As shown, rotation axis A1060 can be integrated with the first support connector 1016 to secure the first end of the support arm 1015 to the body and support member 1010 and to facilitate rotation about rotation axis A1060. Additionally, in various aspects of the disclosed embodiments, rotation axis B 1062 can be embodied by a third support connector 1018. In one or more embodiments, the first support connector 1016, the second support connector 1017, or the third support connector 1018 (hereinafter collectively referred to as: support connectors 1016 to 1018) can be embodied by suitable rotary bearings (e.g., thrust bearings, fluid bearings, rolling element bearings, crossed bearings, face-mounted crossed roller bearings, etc.), rotary joints, rotary bushings, etc., or suitable combinations of the foregoing. It should be understood that the corresponding support connectors 1016 to 1018 can be embodied by different rotational structures, the same rotational structure, etc.

[0081] like Figure 10As shown, as part of right-hand operation, the support arm 1015 can hold the hair dryer assembly 1020 on the right side of the body and support 1010. Rotation axes 1060 to 1064 are operable to hold the hair dryer assembly 1020 on the right side of the body and support 1010 without a force suitable for overcoming the mechanical resistance of the support couplings 1016 to 1018, or without unlocking one or more of the support couplings 1016 to 1018. When properly actuated, rotation axes 1060 to 1064 facilitate rotation of the hair dryer assembly 1020 from the right side of the body and support 1010 to the left side of the body and support 1010 for left-hand operation (e.g., see below). Figure 12 Furthermore, according to various embodiments of this disclosure, rotation axes 1016 to 1018 facilitate rotation of the hair dryer assembly 1020 between the left side and the right side of the body and support 1010, and optionally lock the hair dryer assembly 1020 in right-hand operation at the right side of the body and support 1010 and left-hand operation at the left side of the body and support 1010, as well as unlock it from right-hand operation at the right side of the body and support 1010.

[0082] The hair dryer assembly 1020 may include multiple fan housings 1022, including a first fan housing and a second fan housing. Figure 10 In the aspects of the disclosed embodiments shown, the fan housing 1022 is an axial fan housing surrounding the corresponding axial fan 1024. The axial fan can be powered by a motor (not shown) in response to the activation of the operator control 1030 to rotate within the corresponding fan housing 1022 and generate air pressure to drive the corresponding airflow (e.g., a first airflow and a second airflow) out of the corresponding airflow output. Figure 10 The large volume (cubic feet per meter: CFM) output unit 1042 and high speed (miles per hour: MPH) output unit 1044 are shown (hereinafter collectively referred to as: airflow output units 1042, 1044).

[0083] Airflow outlets 1042 and 1044 facilitate the transfer of corresponding airflow from the fan housing 1022 to the output ports 1048 of the airflow outlets 1042 and 1044. Furthermore, the corresponding airflow may have at least one different hydrodynamic characteristic, such as different relative volume airflow, different relative airflow velocity, different relative airflow energy, or a suitable combination thereof. This can be achieved by utilizing different geometries at the output port 1048 (or different geometries at the inlet port 1046), different blade / fin structures for the corresponding axial fan 1024, different rotational speeds for the corresponding axial fan 1024, different input power for the corresponding axial fan 1024, or different geometries for the corresponding fan housing 1022 and the fan contained therein (e.g., see below). Figure 11 Different hydrodynamic characteristics can be achieved through various means, such as (e.g., the output port 1048 of the high-speed output section 1044, or the intake port 1046), compared to the large-volume output section 1042. In one aspect, the output port 1048 of the high-speed output section 1044 can have a lower cross-sectional area than the large-volume output section 1042, resulting in higher speed and smaller volume airflow dynamics at the output port 1048 compared to the large-volume output section 1042. In another aspect, the geometry of the first fan housing or the first axial fan associated with the large-volume output section 1042 can generate a larger airflow rate than the second fan housing and the second axial fan associated with the high-speed output section 1044. In yet another aspect, the blade or fin structure of the first axial fan can differ from that of the second axial fan to achieve a higher relative volume airflow through the large-volume output section 1042 compared to the high-speed output section 1044. Furthermore, the rotational speed of the first axial fan can differ from that of the second axial fan to achieve a higher relative volume airflow through the large-volume output section 1042 compared to the high-speed output section 1044. Furthermore, the geometry or style of the first fan housing and associated fan may differ from that of the second fan housing and associated fan to achieve a larger volume airflow at the large volume output section 1042 and a higher speed airflow at the high speed output section 1044. Additionally, any suitable combination of the foregoing can be provided for the hair dryer assembly 1020 to achieve a higher volume airflow at the large volume output section 1042 compared to the high speed output section 1044, and a higher speed airflow at the high speed output section 1044 compared to the large volume output section 1042.

[0084] As shown in the figure, the large-volume output section 1042 and the high-speed output section 1044 can be arranged adjacent to each other and are substantially parallel in length. Furthermore, the high-speed output section can be located below the large-volume output section for both right-hand and left-hand operation (see below for example). Figure 12 The high-speed output section 1044 can provide additional energy to help the large-volume output section 1042 move debris, dirt, leaves, grass, and vegetation trimmings from the surface. For example, the high-speed airflow can preferably lift heavier materials (such as wet or compressed vegetation) upwards or move them into the airflow path of the large-volume output section 1042. In some disclosed embodiments, the high-speed airflow can be selectively activated and deactivated by the operator. This can be achieved by selectively activating / deactivating a second axial fan within a second fan housing (independent of the operation of the first axial fan within a first fan housing) via operator control 1030. This allows the operator to deploy a high-speed airflow through the high-speed output section 1044 when needed and to save fuel or optimize the power consumption of the blower 1000 when not needed.

[0085] In at least one embodiment, the bulk output section 1042 may have a first output port 1048 having a first surface area, and the high-speed output section 1044 may have a second output port 1048 having a second surface area. In various aspects of the disclosed embodiments, the second surface area may be smaller than the first surface area. Furthermore, the first air intake port 1046 of the bulk output section 1042 may have the same or similar surface area as the second air intake port 1046 of the high-speed output section 1044. Therefore, when the high-speed output 1030 extends from the second fan housing 1022 to the second output port 1048 at the second air intake port 1046, the surface area of ​​the high-speed output section 1030 narrows from the first fan housing 1022 to the first output port 1048 to a greater extent than the narrowing of the bulk output section 1042 from the second fan housing 1022 to the second output port 1048.

[0086] Figure 11 A multi-output backpack hair dryer 1100 according to an alternative aspect of the disclosed embodiments is shown. In at least some of the disclosed embodiments, hair dryer 1100 may be substantially similar to hair dryer 1000; however, the subject matter disclosure is not limited thereto, and hair dryer 1100 may differ from hair dryer 1000 in one or more elements. As shown, hair dryer 1100 may include a support structure 1100 and a shoulder strap attached to the support structure 1110 for securing hair dryer 1100 to the operator's torso. Additionally, support arms 1015 are provided to secure hair dryer assembly 1120 to support structure 1100 at at least one support coupling 1116. Support coupling 1116 may be a fixed coupling or a rotatable coupling as described herein. In various aspects of the disclosed embodiments, one or more additional support couplings (optionally rotatable) may be provided with support arms 1015.

[0087] The blower assembly 1120 may include an axial fan 1122 located in an axial fan housing 1132, and may also include a centrifugal fan 1124 located in a centrifugal fan housing 1134. The axial fan housing 1132 may define an output port in fluid communication with the inlet port of a bulk output section 1142. Air pressure generated by activating the axial fan 1122 within the axial fan housing 1132 may result in a first airflow being received at the inlet port of the bulk output section 1142 and delivered to its output port. Similarly, the centrifugal fan housing 1134 may define an output port in fluid communication with the inlet port of a high-speed output section 1144. Air pressure generated by activating the centrifugal fan 1124 within the centrifugal fan housing 1134 may result in a second airflow being received at the inlet port of the high-speed output section 1144 and delivered to its output port. In various embodiments, the first airflow may have at least one different hydrodynamic characteristic from the second airflow (e.g., as described above regarding...). Figure 10 (As described above). Compared to the operation of the axial fan 1122 within the axial fan housing 1132, the power consumed by the axial fan 1122, or the surface area of ​​the large-volume output section 1142, different hydrodynamic characteristics can be generated by the operation of the centrifugal fan 1124 within the centrifugal fan housing 1134, the power consumed by the centrifugal fan 1124, the surface area of ​​the high-speed output section 1144, or appropriate combinations thereof.

[0088] In one embodiment, axial fan 1122 and centrifugal fan 1124 can be activated individually or together by operator control 1130. In another embodiment, axial fan 1122 and centrifugal fan 1124 can be deactivated individually or together by operator control 1130. For example, axial fan 1122 can be activated while centrifugal fan 1124 is deactivated; centrifugal fan 1124 can be activated while axial fan 1122 is deactivated, or axial fan 1122 and centrifugal fan 1124 can be activated and deactivated together.

[0089] In a further embodiment, the axial fan housing 1132 or the centrifugal fan housing 1134 may have an air inlet that can be selectively blocked or unblocked. A selectively blocked air inlet isolates the interior of the axial fan housing 1132 or the centrifugal fan housing 1134 from the outside air, thereby effectively suppressing or terminating the airflow output of the large-volume output section 1142 or the high-speed output section 1144, respectively. The blocked air inlet also significantly reduces drag on the axial fan 1122 or the centrifugal fan 1124, thereby reducing power consumption. The selectively blocked air inlet can be achieved when the axial fan 1122 and the centrifugal fan 1124 are powered by a single motor and motor drive mechanism to operate together or separately. This allows the operator (e.g., via operator control 1130 or by manually actuating the air inlet baffle) to effectively select between dual-airflow operation utilizing a first airflow and a second airflow, and single-airflow operation utilizing either the first airflow or the second airflow. When dual-airflow operation is not required, and in embodiments where the axial fan 1122 and centrifugal fan 1124 are not independently activated and deactivated, this allows the operator to reduce power consumption.

[0090] Figure 12 An exemplary two-handed universal operation of the disclosed backpack hair dryer 1200 according to alternative or additional embodiments of this disclosure is depicted. Figure 12 At the top, the hair dryer is shown in a right-hand configuration 1210, with the hair dryer assembly located on the operating side (ride side) of the hair dryer 1200. An exemplary two-handed universal operation begins by rotating the hair dryer assembly upwards about the rotation axis C1064 (e.g., see above). Figure 10 This allows the output port of the hair dryer assembly to rotate vertically above the corresponding fan housing, as shown in right-to-left conversion 1220. The exemplary two-handed universal operation continues by rotating the hair dryer assembly about rotation axis A 1060 and about rotation axis B 1062 as shown, resulting in the hair dryer assembly being on the left side of hair dryer 1200 with its output port still vertical, as shown in right-to-left conversion 1220. To complete the left-hand 1230 configuration, the hair dryer assembly is rotated downwards about rotation axis C 1064 to guide the output port of the hair dryer assembly to a suitable target (e.g., downwards to a surface) in front of hair dryer 1200. It should be understood that... Figure 12The exemplary sequence of rotations for both-handed universal operation shown is merely exemplary and is not intended to limit the manner in which the blower assembly can switch from a right-hand 1210 orientation to a left-hand 1230 orientation. For example, the blower assembly may first rotate about rotation axis A 1060 and then about rotation axis B 1062 to move the blower assembly to the left side of the blower 1200 without rotating about rotation axis C 1064. Alternatively, the blower assembly may first rotate about rotation axis B 1062 to position the output port of the blower assembly to the rear, and then rotate about rotation axis C 1060 to position the blower assembly to the left side of the blower 1200 with the output port facing forward. Other variations known or reasonably conveyed to those skilled in the art through the context provided herein are considered to be within the scope of this disclosure.

[0091] Figure 13 An example hair dryer assembly 1300 according to other aspects of the disclosed embodiments is depicted. The hair dryer assembly 1300 may be part of a backpack hair dryer as disclosed herein or known in the art (e.g., see above). Figure 10 Or 11, or the following text Figure 15 Or 16). Optionally, the hair dryer assembly 1300 may be part of a handheld portable hair dryer in other aspects of the disclosed embodiments (e.g., see below). Figure 17 ).

[0092] The hair dryer assembly 1300 includes an axial fan housing 1332 surrounding an axial fan 1322, adjacent to a centrifugal fan housing 1334 surrounding a centrifugal fan 1324. A large-volume output section 1342 directs the airflow generated by the axial fan 1322 toward the output section of the hair dryer assembly 1300; similarly, a high-speed output section 1344 directs a second airflow generated by the centrifugal fan 1324 toward the output section of the hair dryer assembly 1300. Furthermore, the axial fan housing 1332 can be positioned relative to the centrifugal fan housing 1334 to achieve a symmetrical weight distribution between the centrifugal fan housing 1334 (and the centrifugal fan 1324) and the axial fan housing 1332 (and the axial fan 1322). For example, the axial fan housing 1332 can be positioned such that its centerline 1352 is coplanar or substantially coplanar with the centerline 1354 of the centrifugal fan housing 1334. This provides symmetrical weight balance to the hair dryer assembly 1300 both outside and during operation. For example, the centrifugal force generated by the rotation of centrifugal fan 1324 and axial fan 1322 can also be (substantially) coplanar, thereby minimizing the resulting shear force and improving operator comfort, reducing wear on the support couplings (see, for example, [link to relevant documentation]). Figure 10 )wait.

[0093] As shown in the figure, the axial fan housing 1332 can be positioned in front of the centrifugal fan housing 1324 along the length of the blower assembly 1300. This allows the length of the large-volume output section 1342 to be shorter than the length of the high-speed output section 1344. Additionally, this optionally allows the large-volume output section 1342 to rotate relative to the high-speed output section 1344 about a suitable axis of rotation via an optional position control 1330, such as... Figure 14 As shown in more detail below. In such an embodiment, the operator can adjust the orientation of the large-volume output unit 1342 relative to the high-speed output unit 1344 within the directional range allowed by the operation position control 1330.

[0094] Figure 14 Example diagrams of a blower device 1400 according to further embodiments of the present disclosure are provided. For example, the blower device 1400 provides an adjustable output shaft about a rotation axis. This allows the operator to increase or decrease the angular rotation between the first output shaft and the second output shaft.

[0095] The blower 1400 may include a centrifugal fan 1422 and a centrifugal housing, as well as an axial fan 1424 and an axial housing, similar to the above. Figure 13 As shown. Additionally, the axial fan housing can be fixed to a rotating shaft 1432 near the center of the centrifugal fan housing via a rotating arm 1434. Rotation of the axial fan housing about the rotating shaft 1432 facilitates movement of the rotatable output shaft 1426 fixed to the axial fan housing. This allows the operator to move the rotatable output shaft 1426 to multiple positions, including a low position 1454, a middle position 1452, and a high position 1450 as shown. These positions can be set in response to movement of the position control 1430 and its associated low position 1444, middle position 1442, and high position 1440. This partial view illustrates an internal view 1436 and an exemplary control release device 1438 that locks the position control 1430 in one of the low position 1440, middle position 1442, and high position 1440, and releases the position control 1430 from any of the locked positions.

[0096] Figure 15An exemplary multi-output backpack hair dryer 1500 with a vertically back-mounted centrifugal fan is shown in another embodiment of this disclosure. The hair dryer 1500 includes a body and a support 1530 that provides structural support for the hair dryer 1500. Furthermore, a motor 1510 is fixed to the surface of the body and support 1530 on the side opposite to the shoulder strap assembly 1550 and the strap 1560. Adjacent to the motor 1510 is a housing surrounding one or more fans that rotate about a vertical fan rotation axis 1515. The fans may be centrifugal fans mounted perpendicularly to each other within the housing along the vertical fan rotation axis 1515. In one embodiment, the fan housing may define multiple fan housing interiors within a common housing (e.g., see also below). Figure 19 The corresponding centrifugal fan is enclosed within this common housing, and the airflow output is defined by the horizontal volute 1520. In another embodiment, the fan housing may comprise a plurality of separate adjacent fan housings having separate housings mounted perpendicularly to each other along the vertical fan rotation axis 1515, and each housing one of the centrifugal fans. The horizontal volute is in fluid communication with the respective air inlet ports of the bulk output section 1512 and the high-speed output section 1514.

[0097] The motor 1510 can be an electric motor, an internal combustion engine, etc. The operator control 1570 can activate or deactivate the motor to drive the rotation of the fan within the fan housing. An air inlet port 1540 defined in the fan housing allows temporary fluid communication between external air and the centrifugal fan to generate a corresponding airflow that exits the fan housing through a horizontal volute 1520 and corresponding large-volume output 1512 and high-speed output 1514. In some embodiments, the air inlet port 1540 leading to the interior of a fan housing (or the fan housing itself) can be selectively blocked to confine the airflow to a centrifugal fan located within the fan housing. The baffle device can be engaged at the operator control 1570 (in conjunction with a second motor (not shown) connected to a selective baffle device), or the selective baffle device can be manually opened or closed by the operator.

[0098] Figure 16 An exemplary multi-output backpack hair dryer 1600 with a horizontally back-mounted centrifugal fan is depicted in some further embodiments of this disclosure. The hair dryer 1600 includes a body and a support 1630 that provides structural support for the hair dryer 1600. A motor 1610 is fixed to an end of a fan housing (or a stack of fan housings). The fan housings may define the interiors of a plurality of fan housings stacked along a horizontal fan rotation axis 1615 (e.g., having a common housing). The fan housing interiors may surround a respective centrifugal fan or a single dual-sided fan at their intersections (e.g., see below). Figure 19In one embodiment, one side of the dual-fan assembly is fluidly engaged with the interior of the first fan housing, and the second side of the dual-fan assembly is fluidly engaged with the interior of the second fan housing. In another embodiment, the fan housing may include separate fan housings (relative to fan housing shell portions) fixed horizontally relative to each other along the horizontal fan rotation axis 1615. The rotation of the fan generates multiple airflows within the fan housing, which exit through the vertical volute 1620 and exit the corresponding large-volume and high-speed output section, as described herein. One or more air inlets 1640 supply external air to the fan housing. In one embodiment, one air inlet 1640 may be selectively blocked by a baffle to selectively suppress one airflow of the blower 1600 and reduce power consumption at the motor 1610 when the suppressed airflow is not required by the operator.

[0099] Figure 17 A figure shows a portable hair dryer 1700 with axial and centrifugal fans according to an additional embodiment of the present disclosure. The portable hair dryer 1700 can be configured for hand-held operation by an operator. An optional handle and grip 1732 is provided on the top side of the portable hair dryer 1700, and a ground support 1734 is fixed to the bottom side of the portable hair dryer 1700 to support the portable hair dryer 1700 on a surface.

[0100] The portable hair dryer 1700 may have one or more motors 1726 that power a centrifugal fan 1724 within a centrifugal fan housing and an axial fan 1722 within an axial fan housing. In some embodiments, the portable hair dryer 1700 may have a first motor and a first motor driver to power the centrifugal fan 1724, and may have a second motor and a second motor driver to power the axial fan 1722. In other embodiments, the portable hair dryer 1700 may have a single motor and a first motor driver that mechanically powers the centrifugal fan 1724 and a second motor driver (e.g., extending from the first motor driver) that mechanically powers the axial fan 1722.

[0101] Axial fan 1722 generates a first airflow through a large-volume output section 1742. The lower large-volume output section 1742 is a high-speed output section 1744, which receives the airflow generated by centrifugal fan 1724. In one embodiment, the axial fan housing and the large-volume output section can be rotated between multiple positions via position control 1730 and a rotating arm 1434 fixed to a rotation shaft 1432. In another embodiment, an operator control (not shown) can activate and deactivate motor 1726 to power the axial fan 1722 and centrifugal fan 1724. In at least one aspect of the embodiment, the operator control can independently activate or deactivate the axial fan 1722 and centrifugal fan 1724 to selectively generate one airflow, two airflows, or no airflow. In other embodiments, the centrifugal fan may be selectively equipped with baffles to suppress airflow from the high-speed output section 1744, thereby allowing the operator to generate a large-volume airflow through the large-volume output section 1742 and a high-speed airflow through the high-speed output section 1744, or only generate a large-volume airflow through the large-volume output section 1742.

[0102] Figure 18 An example multi-output hair dryer 1800 with an airflow splitter according to an alternative or additional embodiment of the present disclosure is depicted. The hair dryer 1800 may include a first fan housing: fan housing 1 1832 and a second fan housing: fan housing 2 1834, collectively referred to as fan housings 1832 to 1834. Fan housings 1832 to 1834 surround respective fans powered by a motor 1820 and driven by a common motor driver 1825. Fan housing 1832 defines an output portion in fluid communication with an air inlet port of a bulk output portion 1842, while fan housing 2 1834 defines a second output portion in fluid communication with a second air inlet port of a high-speed output 1844. Furthermore, an air output coupling 1810 interconnects the bulk output portion 1842 with the high-speed output 1844. Additionally, a gate splitter valve 1815 is positioned at at least the intersection of the high-speed output 1844 and the air output coupling 1810. The gate splitter valve 1815 may be configured to move between a first position and a second position. In the first position, the gate diversion valve 1815 closes the intersection of the high-speed output 1844 and the air output connector 1810 to the airflow, and instead drives the airflow from the fan housing 2 1834 through the output port of the high-speed output 1844. In the second position, the gate diversion valve 1815 closes the output port of the high-speed output 1844 to the airflow, and drives the airflow from the fan housing 2 1834 through the air output connector 1810 into the bulk output section 1842 to incorporate the airflow from the fan housing 1 1832. Then, the combined airflow from the fan housing 2 1834 and the fan housing 1 1832 is driven through the output port of the bulk output section 1842.

[0103] In at least one embodiment, the gate diversion valve 1815 may include a mechanical airflow switch (e.g., a baffle, etc.) at the intersection of the high-speed output 1844 and the air output connector 1810, and a second mechanical airflow switch at a second intersection of the large-volume output 1842 and the air output connector 1810. In this embodiment, the second mechanical airflow switch can close the second intersection of the large-volume output 1842 and the air output connector 1810, while simultaneously closing the intersection of the high-speed output 1844 and the air output connector 1810. This directs airflow from the fan housing 11832 through the large-volume output 1842 while minimizing the impact on that airflow caused by the open intersection at the air output connector 1810 and the large-volume output 1842. Similarly, when the mechanical airflow switch opens the intersection of the high-speed output 1844 and the air output connector 1810, the second mechanical airflow switch can open the intersection of the large-volume output 1842 and the air output connector 1810.

[0104] Figure 19 Figures are provided of a multi-output blower 1900 having an airflow splitter and a single fan according to another embodiment of the present disclosure. The blower 1900 includes a fan housing 1934, which is mechanically connected to a motor 1920 via a motor driver 1925. The motor 1920 and the motor driver 1925 drive the rotation of a fan (see below) within the fan housing 1934 to generate multiple airflows output from a large-volume output section 1942 and a high-speed output section 1944, respectively. Furthermore, the multiple airflows can be generated by a single fan, as described below.

[0105] For example, the hair dryer 1900 may include a dual-sided fan 1938 located at the intersection of two internal portions of a fan housing 1934. The dual-sided fan 1938 may form part of a housing separator 1936 that physically separates a first internal portion of the fan housing 1934 from a second internal portion of the fan housing 1934. A first side or CFM side 1938A of the dual-sided fan 1938 may be in fluid communication with the first internal portion of the fan housing 1934, and a second side or MPH side 1938B of the dual-sided fan 1938 may be in fluid communication with the second internal portion of the fan housing 1934. The CFM side 1938A may have a different fan or blade geometry than the MPH side 1938B. Differences may include a different number of blades, different blade shapes, different blade surface areas, or suitable combinations thereof. In particular, the CFM side 1938A can have a blade geometry selected to drive a large volume airflow relative to the MPH side, and the MPH side can have a different blade geometry selected to drive a high-speed airflow relative to the CFM side.

[0106] In addition to the foregoing, an air output connector 1910 may be provided, which connects the high-speed output unit 1944 to the large-volume output unit 1942. A gate diverter valve 1915 is disposed within the air output connector 1910. The gate diverter valve 1915 can selectively interconnect the high-speed output unit 1944 to the large-volume output unit 1942 via the air output connector 1910, and can block the flow of the high-speed output unit 1944 by orienting the gate diverter valve 1915 in a first orientation. Alternatively, by orienting the gate diverter valve 1915 in a second orientation, the air output connector 1910 can be blocked and the flow of the high-speed output unit 1944 can be opened.

[0107] Figure 20 A figure is provided of a multi-output blower 2000 having an airflow splitter and dual axial fans in a further disclosed embodiment. The blower 2000 may include a first axial fan in a first fan housing: axial fan 1 2032, which is adjacent (e.g., above) to a second axial fan in a second fan housing: axial fan 2 2034 (collectively referred to as axial fans 2032 to 2034). The output portion of the first fan housing is in fluid communication with the inlet of a bulk output shaft 2042, and the second output portion of the second fan housing is in fluid communication with the second inlet of a high-speed output shaft 2044. An air output coupling 2010 is provided that fluidly couples the high-speed output shaft 2044 to the bulk output shaft 2042, including a gate splitter valve 2015 that selectively opens and selectively closes the air output coupling 2010. When in the open orientation, airflow from the second fan housing is diverted as a deflector flow 2052 to the bulk output portion 2042. When in the off orientation, the airflow from the second fan housing is a non-directional flow 2054, which continues to the output port of the high-speed output 2044.

[0108] Regarding the various functions performed by the aforementioned components, machines, devices, processes, etc., unless otherwise stated, the terms used to describe these components (including references to “apparatus”) are intended to correspond to any component (e.g., a functional equivalent) that performs the specified function of the described component, even if it is not structurally equivalent to the disclosed structure, and performs the functions of the exemplary aspects of the embodiments shown herein.

[0109] Furthermore, while a particular feature may have been disclosed with respect to only one of several embodiments, such feature may be combined with one or more other features of other embodiments, as may be desired and advantageous for any given or particular application. Moreover, the terms “comprising” and “including” and their variations, as used in the specific embodiments or claims, are intended to be inclusive in a manner similar to the term “containing.”

[0110] For example, the figures included herein describe various blower devices, fan housings, fan geometries, and airflow outputs. It should be understood that such figures may include specified devices, housings, etc., some specified devices / housings / geometry / outputs, or additional devices / housings / geometry / outputs not explicitly depicted but known in the art or reasonably conveyed to those skilled in the art through the context provided herein. Components of the disclosed blower devices may also be implemented as sub-components of another disclosed component (e.g., axial fan housing 1132 and centrifugal fan housing 1134 may be integrated into a single housing having separate axial and centrifugal internal portions), while other components disclosed as sub-components may be separate components in various embodiments (e.g., rotation axes 1060 to 1064 may be embodied in multiple support arms 1015 rather than integrated into a single support arm 1015). Furthermore, embodiments within specific figures of this specification may be applied, in whole or in part, to other embodiments depicted in other figures without limitation, only to the suitability of achieving the disclosed functions or purposes as understood by those skilled in the art, and vice versa. As an illustrative (and non-limiting) example, Figure 14 The rotatable output shaft 1426 can replace Figure 10 The large-volume output section 1042 of the hair dryer assembly 1020, the upper axial fan housing 1022, and the upper axial fan 1024, or similarly replacing them. Figure 11 The hair dryer component 1120, or a similar replacement. Figure 15 Hair dryer 1500 Figure 16 Hair dryer 1600, etc. The components of the disclosed architecture can also interact with one or more other components not specifically described herein but known to those skilled in the art.

[0111] This disclosure provides a hair dryer. The hair dryer may include a body defining a rigid structure, one or more straps fixed to the body and configured to secure the hair dryer to an operator, and a motor generating mechanical power. Additionally, the hair dryer may include a hair dryer housing and a hair dryer fan, the hair dryer fan being contained within the hair dryer housing and powered by the motor to generate air pressure within the hair dryer housing, and an output shaft having an input portion fluidly connected to the hair dryer housing and an inclined portion for guiding airflow in response to the generation of air pressure within the hair dryer housing. Furthermore, the hair dryer may include a second output shaft adjacent to the output shaft, the second output shaft having an input portion fluidly connected to or adjacent to the hair dryer housing, wherein the second output shaft has a second inclined portion for guiding a second airflow from or from the hair dryer housing. Furthermore, the hair dryer may include a support arm fixed to the hair dryer housing at a first support connector and fixed to the body of the hair dryer at a second support connector to support the weight of the hair dryer housing, the output shaft and the second output shaft at a distance from the body of the hair dryer, and the support arm has at least one axis of rotation to adjust the orientation or position of the hair dryer housing, the output shaft and the second output shaft.

[0112] In one aspect of these embodiments, a hair dryer housing surrounds a hair dryer fan and defines an output portion fluidly connected to an input portion of an output shaft; and a second hair dryer housing surrounds a second hair dryer fan and defines a second output portion fluidly connected to an input portion of a second output shaft, wherein the second hair dryer fan generates air pressure within the second hair dryer housing to generate the second airflow.

[0113] On the other hand, both the hair dryer fan and the second hair dryer fan are centrifugal fans, and furthermore, the hair dryer housing and the second hair dryer housing are centrifugal fan housings.

[0114] In another aspect, the hair dryer fan is a centrifugal fan and the hair dryer housing is a centrifugal fan housing, and wherein the second hair dryer fan is an axial fan and the second hair dryer housing is an axial fan housing, and in yet another aspect, the hair dryer device may include a second motor that generates a second mechanical power, wherein the second hair dryer fan is powered by the second motor and the second mechanical power to generate air pressure within the second hair dryer housing.

[0115] On the other hand, the airflow has a volume in cubic feet per minute (CFM) higher than the second airflow, or a velocity in miles per hour (MPH) lower than the second airflow, or a combination thereof. In yet another aspect, a second inclined portion of the second output shaft extends substantially parallel to the inclined portion of the output shaft. In yet another aspect, the blower may also include an inclined portion rotatable coupling that rotatably secures the output shaft to the blower housing and is configured to rotate the output shaft relative to the second output shaft between a first position substantially parallel to the second output shaft, and a second position between approximately ten and approximately twenty degrees from the second output shaft, with the second position having a parallelism between approximately ten and approximately twenty degrees to the second output shaft.

[0116] In another aspect, the input portion of the second output shaft is connected to the second hair dryer housing, and further, the second hair dryer housing is rotatably fixed to the hair dryer housing via a rotary coupling configured to selectively rotate the second hair dryer housing and the second output shaft relative to the output shaft. In another aspect of the disclosed embodiments, the second support coupling implements at least one axis of rotation and provides rotation of the hair dryer housing, the output shaft, and the second output shaft between the right side of the body of the hair dryer (facilitating right-handed operation) and the left side of the body of the hair dryer (facilitating left-handed operation). In another aspect, the first support coupling has at least one axis of rotation and provides vertical rotation of the hair dryer housing, the output shaft, and the second output shaft about the first support coupling to the hair dryer housing. In another aspect, the second support connector is embodied as at least one axis of rotation and provides rotation of the blower housing, output shaft and second output shaft between the right side and the left side of the body, and the blower device may include a second axis of rotation embodied by the first support connector and a third axis of rotation along the support arm between the first and second support connectors, the second axis of rotation facilitating vertical rotation of the output shaft and second output shaft about the first support connector, and the third axis of rotation facilitating horizontal rotation of the blower housing, output shaft and second output shaft.

[0117] In one or more other aspects of this disclosure, a blower is provided, configured to be removably attached to an operator's torso. The blower may include a body providing a rigid support structure, a strap assembly coupled to the body and configured to removably attach the body to the operator's torso, a fan housing coupled to the body and surrounding a fan coupled to a drive mechanism and defining a first fan housing output, and a motor having a motor output connected to the drive mechanism, wherein the motor generates mechanical power at the motor output to drive the rotation of the fan. In another aspect, the blower may include an airflow output defining an inlet coupled to the fan housing output and directing airflow generated in response to the rotation of the fan within the fan housing along the length of the airflow output to a first output port. In yet another aspect, the blower may include a second airflow output defining a second inlet coupled to a second fan housing output and directing a second airflow from the second fan housing output along the length of the second airflow output to a second output port, wherein the second airflow defines at least one of a different volumetric flow rate or a different airflow velocity than the airflow.

[0118] In an additional aspect of the embodiments herein, the fan housing includes a first housing interior defining a fan housing output portion and a second housing interior physically separated from the first housing interior defining a second fan housing output portion. The blower may also include a first air inlet coupled to the fan housing and supplying external air to the first housing interior, and may include a second optional air inlet coupled to the second housing interior, wherein the second optional air inlet is coupled to an optional air inlet baffle movable between an open position and a closed position, wherein in the open position, the optional air inlet baffle allows air from outside the second housing interior to enter the second housing interior, and in the closed position, reduces or prevents air from outside the second housing interior from entering the second housing interior.

[0119] In one aspect of this disclosure, the blower may further include a second fan housing connected to the main body adjacent to the fan housing. The second fan housing may surround a second fan coupled to the drive mechanism or coupled to the second drive mechanism, and the second fan housing may define a second fan housing output coupled to the second air inlet of the second output shaft; and further, wherein the second airflow is generated in response to rotation of the second fan within the second fan housing.

[0120] In another aspect, the fan housing defines an air inlet to receive outside air into the fan housing in fluid communication with the fan, and wherein the second fan housing includes a second air inlet and a baffle configured to selectively open to allow outside air into the second fan housing and to selectively close to restrict outside air from entering the second fan housing. In yet another aspect, both the fan and the second fan are centrifugal fans, and both the fan housing and the second fan housing are centrifugal fan housings. Furthermore, in yet another aspect, the fan housing and the second fan housing are oriented substantially vertically relative to each other in their main bodies and define substantially vertical axes of rotation for the fan and the second fan; and in other aspects, the fan housing and the second fan housing are oriented substantially horizontally relative to each other in their main bodies and define substantially horizontal axes of rotation for the fan and the second fan. In at least one additional aspect, one of the fan or the second fan is a centrifugal fan, and the second of the fan or the second fan is an axial fan.

[0121] In alternative or additional embodiments of this disclosure, a blower device is provided. The blower device may include a motor having a motor output portion that generates mechanical power, a fan housing surrounding a fan coupled to the motor output portion and defining a first fan housing output portion, a second fan housing defining a second fan housing output portion, and an airflow output shaft defining an air inlet port fluidly coupled to the first fan housing output portion and guiding airflow generated in response to rotation of the fan within the fan housing along the length of the airflow output port to the first output port. The blower may further include a second airflow output shaft and a selectable diverter valve, the second airflow output shaft defining a fluidly connected connection to a second fan housing output port and receiving a second airflow generated within the second fan housing from the second fan housing output port, the selectable diverter valve being located at least at the intersection of the air output connection and the second airflow output shaft, having a first orientation and a second orientation, wherein in the first orientation, the selectable diverter valve directs the second airflow from the second fan housing output port to a second output port defined by the second airflow output shaft, and wherein in the second orientation, the selectable diverter valve directs the second airflow from the second fan housing output portion through the air output connection into the airflow output shaft, and discharges it together with the airflow from the first output port.

[0122] In one aspect of the blower, the fan is a dual-sided fan rotatably positioned at the intersection of a fan housing and a second fan housing, one side of the dual-sided fan being in fluid communication with the interior of the fan housing, and the second side of the dual-sided fan being in fluid communication with the interior of the second fan housing. In another aspect, one side generates airflow within the fan housing in response to fan rotation caused by the motor output, the second side generates airflow within the fan housing in response to fan rotation caused by the motor, and the second side generates a second airflow within the second fan housing in response to the fan rotation.

[0123] In a further aspect, the blower may include a second fan, which is surrounded by a second fan housing and connected to a motor output or a second motor output of a second motor of the blower, wherein the second fan is configured to rotate within the second fan housing and generate a second airflow in response to mechanical power at the motor output or in response to a second mechanical power of the second motor at the second motor output.

[0124] In one aspect, the hair dryer may further include: a body providing a rigid structure; a shoulder strap assembly coupled to the body and configured to be removably secured to the operator's torso; and a support arm secured at one end to a fan housing and a second fan housing and at the second end to the body. The support arm extends outward from the right side of the body to facilitate right-handed operation of the hair dryer, or extends outward from the left side of the body to facilitate left-handed operation of the hair dryer, and may optionally be rotatable between the left and right sides via one or more rotation axes integrated in the support arm. In another aspect, the hair dryer may include a handle on the top side of the hair dryer and a ground support on the bottom side of the hair dryer.

[0125] As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise stated or clear from the context, “X adopts A or B” is intended to mean any natural inclusive arrangement. That is, “X adopts A or B” is satisfied if X adopts A; X adopts B; or X adopts both A and B. Furthermore, the articles “a” and “an” used in this application and the appended claims should generally be interpreted as meaning “one or more” unless otherwise stated or clearly pointed to in the context.

[0126] In other embodiments, combinations or sub-combinations of the disclosed embodiments can be advantageously performed. Furthermore, the embodiments described in a particular drawing or group of drawings should not be limited to these illustrations. Rather, any suitable combination or subset of elements from one or more drawings can be applied to other embodiments in other drawings, where it is suitable for those skilled in the art to achieve the purposes disclosed herein, known in the art, or reasonably conveyed to those skilled in the art by the context provided in this specification. In use, block diagrams of the disclosed embodiments or flowcharts are grouped for ease of understanding. However, it should be understood that combinations of blocks, additions of new blocks, rearrangements of blocks, etc., are contemplated in alternative embodiments of this disclosure.

[0127] Based on the foregoing, it should be understood that the embodiments and implementation methods described herein are for illustrative purposes only, and various modifications or changes thereto will be suggested to those skilled in the art and are included within the spirit and scope of this application and the scope of the appended claims.

Claims

1. A blower device, characterized in that, include: A fan, the fan being connected to a drive mechanism that defines the fan's axis of rotation; A fan housing that surrounds the fan and defines a space in which the fan rotates in response to a rotational force applied to the drive mechanism; An electric motor is connected to the drive mechanism to generate rotational force and apply the rotational force to the drive mechanism, causing the fan to rotate within the fan housing; An air inlet, defined on the surface of the fan housing, is used to receive air from outside the blower into the fan housing, the air interacting with the fan, wherein the rotation of the fan within the fan housing while communicating with the air generates first pressurized air; A first output section is fluidly connected to the fan housing, and the first output section receives the first pressurized air and guides the first pressurized air to the exhaust port of the first blower. Second fan housing; A second air inlet, defined adjacent to the second fan housing, has a variable baffle opening adjustable between an open position and a closed position, wherein, in response to the variable baffle opening being in the open position, second external air is received from outside the blower into the second fan housing, and in response to the variable baffle opening being in the closed position, second external air is prevented from entering the second fan housing; and A second output section, fluidly connected to the second fan housing, receives second pressurized air generated within the second fan housing in response to the rotational force applied to the drive mechanism and in response to the variable baffle opening being in the open position, wherein the second output section directs the second pressurized air to the exhaust port of the second blower; and The blowing device satisfies at least one of the following: - The first output section and the first blower exhaust port define a wide output path and a wide output opening relative to the second blower exhaust port, the wide output path and wide output opening facilitating the output of a large volume of air from the blower using the first pressurized air; or - The second output section and the second blower exhaust port define a narrow output opening relative to the first blower exhaust port, the narrow output opening facilitating the output of high-speed air from the blower using second pressurized air; The first and second output sections are arranged such that high-speed air can replenish the large volume of air.

2. The blower device according to claim 1, characterized in that, The hair dryer is a handheld hair dryer, and the motor is an electric motor powered by a rechargeable battery fixed to the handheld hair dryer.

3. The blower device according to claim 1, characterized in that, In the position held by the operator, the exhaust port of the first blower has a fixed position oriented above the exhaust port of the second blower, such that the first pressurized air is guided outward from the blower above the second pressurized air.

4. The blower device according to claim 1, characterized in that, The first output section or the second output section is formed of a rigid material, which respectively defines a fixed first blower exhaust port or a fixed second blower exhaust port.

5. The blower device according to any one of claims 1 to 4, characterized in that, In response to the variable baffle opening being in the open position, the blowing device generates a large volume of air output from the wide output opening of the first blower exhaust port and generates high-speed air output from the narrow output opening of the second blower exhaust port.

6. The blower device according to any one of claims 1 to 4, characterized in that... At least one of the following: The first output portion is fluidly connected to the fan housing at the top portion of the fan housing, and wherein, when the first blower exhaust portion extends away from the fan housing, the first blower exhaust port is guided downward from the top portion of the fan housing; The second output section is fluidly connected to the second fan housing at the top portion of the second fan housing, and wherein, when the second blower exhaust section extends away from the second fan housing, the second blower exhaust port is guided downward from the top portion of the second fan housing; or The first output is fluidly connected to the fan housing at the bottom of the fan housing, and the second output is fluidly connected to the second fan housing at the bottom of the second fan housing.

7. The blower device according to claim 1, characterized in that, It also includes a second fan, which is coupled to the drive mechanism and enclosed within a second fan housing, wherein the second fan rotates in response to a rotational force applied to the drive mechanism by the motor, and wherein, in response to the variable baffle opening being in an open position, second external air is received within the second fan housing and communicates with the second fan during rotation to generate second pressurized air within the second fan housing, and wherein the second air inlet is located between the fan housing and the second fan housing, and wherein the drive mechanism extends from the motor to the second fan within the second fan housing, through the second air inlet and extending to the fan within the fan housing.

8. The blower device according to claim 1, characterized in that: The second fan housing is adjacent to the first fan housing; The fan is positioned at the intersection of the fan housing and the second fan housing; The first surface of the fan defines a first fan mode, which rotates within the fan housing in response to a rotational force applied to the drive mechanism and communicates with the air to generate the first pressurized air; and The second surface of the fan defines a second fan mode, which rotates within the second fan housing in response to a rotational force applied to the drive mechanism, and communicates with a second external air and generates a second pressurized air in response to the variable baffle opening being in an open position.

9. The blower device according to claim 8, characterized in that, The second air inlet is located on the surface of the second fan housing adjacent to the motor, the separator surface is shared by the fan housing and the second fan housing, and the air inlet is located on the far side surface of the fan housing relative to the separator surface.

10. The blower device according to claim 1, characterized in that, It also includes an intake actuator that allows the operator to control the opening of the variable damper and the physical transition between the open and closed positions.

11. A handheld hair dryer with multiple air output ports, characterized in that, include: A first output port having a first output surface area; A second output port having a second output surface area, wherein the second output surface area is smaller than the first output surface area; A first housing, which is connected to the first output port and physically isolated from the second output port; A second housing is connected to the second output port and is physically isolated from the first output port; An electric motor that provides mechanical power to the first housing or the second housing or both; and An air pressurizing device, which responds to mechanical power output by the motor and is configured to generate a first pressurized air in the first housing and discharge it from the first housing via the first output port, and is configured to conditionally generate a second pressurized air in the second housing and discharge it via the second output port; The air pressurization device includes a first fan located in the first housing to generate a first pressurized air and a second fan located in the second housing to conditionally generate a second pressurized air. The first output section and the second output section are arranged such that the second pressurized air can supplement the first pressurized air.

12. The handheld hair dryer according to claim 11, characterized in that, It also includes an adjustable air intake baffle that defines at least a portion of the surface of the second housing and is configured to adjust between an open position and a closed position, wherein the air pressurizing device generates the second pressurized air within the second housing in response to the adjustable air intake baffle being adjusted to the open position.

13. The handheld hair dryer according to claim 11, characterized in that, The air pressurization device includes a fan having a first fan surface and a second fan surface, wherein the first fan surface is exposed to the first housing and communicates with air supplied by an air inlet of the first housing to generate first pressurized air, and wherein the second fan surface is exposed to the second housing to conditionally generate second pressurized air.

14. The handheld hair dryer according to claim 11, characterized in that, It also includes a rechargeable battery for supplying power to the motor, wherein the motor is an electric motor.

Images