Handheld hair drier

Abstract

The utility model belongs to the technical field of gardening tools, and particularly discloses a handheld hair drier which comprises a machine shell, a duct assembly, a power assembly and a battery pack, the duct assembly is used for air circulation, the power assembly is used for pushing air to flow, the duct assembly comprises an outer pipe set and an inner pipe set arranged in the outer pipe set, and the battery pack is arranged in the outer pipe set. A motor in the power assembly is arranged in an inner pipe set, the inner diameter of the end, facing the air outlet, of the inner pipe set is gradually decreased, a backflow end is formed, a plurality of flow guide ribs are arranged on the inner wall of the backflow end, and the flow guide ribs enable motor heat dissipation airflow to be parallel to the axis of the motor. Part of air blown out from the space between the outer pipe set and the inner pipe set flows back into the backflow end and flows out from the other end of the inner pipe set. Self-circulation heat dissipation is achieved, cost and energy consumption are reduced, and meanwhile the auxiliary handle is provided to improve the use comfort degree.

Description

Technical Field

[0001] This utility model relates to the field of garden tool technology, and in particular to a handheld hair dryer. Background Technology

[0002] Handheld hair dryers are a common garden tool, mainly used to clear fallen leaves from outdoor roads. For example, the hair dryer disclosed in patent number CN111893934A mainly uses a rotor fan integrated on the motor to dissipate heat from the motor, resulting in high cost and power consumption. In addition, the body only has a fixed grip, which is inconvenient for holding with both hands and cannot adjust the grip angle, affecting the use effect. Utility Model Content

[0003] This invention aims to overcome the shortcomings of existing technologies by providing a self-heating handheld hair dryer with multiple grip positions.

[0004] The present invention solves the technical problem by adopting the following technical solution: a handheld hair dryer, comprising a housing, a duct assembly, a power assembly, and a battery pack. The duct assembly provides airflow, and the power assembly drives the airflow. The duct assembly includes an outer tube assembly and an inner tube assembly disposed within the outer tube assembly. The motor in the power assembly is disposed within the inner tube assembly. The inner diameter of the inner tube assembly gradually decreases towards the air outlet, forming a return end with an opening. Multiple guide ribs are provided on the inner wall of the return end. Part of the air blown out between the outer and inner tube assemblies flows back into the return end to form a motor cooling airflow. The motor cooling airflow flows out from the end of the inner tube assembly away from the return end. The guide ribs ensure that the motor cooling airflow is parallel to the motor axis.

[0005] In several embodiments, the duct assembly includes a collector, a rectifier, and a baffle arranged coaxially. A housing 1 is disposed inside the collector, and a housing 2 is disposed inside the rectifier. The outer walls of the collector and the rectifier form an outer tube assembly. The housing 1 and the housing 2 are paired to form an inner tube assembly. The guide rib is disposed inside the housing 2.

[0006] In several embodiments, the power assembly further includes a fan blade connected to the output end of the motor and located on the outside of the housing.

[0007] In several embodiments, an auxiliary handle is rotatably provided on the housing, and a locking assembly is provided between the auxiliary handle and the housing. By controlling the locking assembly, the auxiliary handle can be rotated or fixed at a rotation angle.

[0008] In several embodiments, the locking assembly includes a first locking body and a second locking body, the second locking body being screwed onto the first locking body and capable of clamping and fixing the auxiliary handle.

[0009] In several embodiments, a grip handle is provided on the housing, and the battery pack is disposed below the grip handle.

[0010] In several embodiments, an air inlet shroud is provided on one side of the battery pack, and the air inlet shroud is connected to the outer pipe assembly.

[0011] In several embodiments, the center of gravity axis of the battery pack intersects the axial center line of the grip handle at point one. The horizontal straight-line distance between point one and the rotation center point of the auxiliary handle is 200-600mm, and the vertical straight-line distance between point one and the highest point of the auxiliary handle is 50-200mm.

[0012] In several embodiments, the horizontal straight-line distance between the end face of the air inlet shroud and the end face of the housing closest to its axial position is 10-80 mm.

[0013] In several embodiments, a blowpipe is provided at the air outlet of the duct assembly.

[0014] This utility model has the following beneficial effects:

[0015] This invention utilizes the structure of duct components and guide ribs to achieve motor heat dissipation through airflow recirculation via air pressure difference, thereby reducing costs and energy consumption. At the same time, it also reduces noise and vibration by eliminating the need for a motor cooling fan.

[0016] This invention improves user comfort and reduces the workload by using an auxiliary handle structure. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and do not represent all possible implementations, nor should they be considered as limiting the scope of this invention.

[0018] Figure 1 This is an overall schematic diagram of the handheld hair dryer in Example 1;

[0019] Figure 2 for Figure 1 Cross-sectional schematic diagram of the medium bypass duct assembly and the power assembly;

[0020] Figure 3 for Figure 2 An explosion diagram;

[0021] Figure 4 for Figure 2 A schematic diagram of the airflow path in the middle;

[0022] Figure 5 for Figure 1 An exploded view of the middle casing and auxiliary handle. Detailed Implementation

[0023] The embodiments of the present utility model are described in detail below. In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments.

[0024] Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] The terminology used herein is intended to explain the embodiments and is not intended to limit and / or restrict the present invention.

[0026] Example 1

[0027] like Figures 1-3 As shown, the handheld hair dryer in this embodiment includes a housing 10, a duct assembly 20, a power assembly 30, a battery pack 40, and a blowpipe 80. The duct assembly 20 provides airflow, the power assembly 30 is used to drive the airflow, and the blowpipe 80 is located at the air outlet of the duct assembly 20 to achieve blowing.

[0028] The duct assembly 20 includes a collector 21, a rectifier 22, and a baffle 23 arranged coaxially. The collector 21 has a housing 211 inside, and the rectifier 22 has a housing 221 inside. The outer walls of the collector 21 and the rectifier 22 form an outer tube assembly 201. The housing 211 and the housing 221 are paired to form an inner tube assembly 202. The motor 31 in the power assembly 30 is installed inside the inner tube assembly 202, and air is blown out from the baffle 23.

[0029] Knot 2- Figure 4 , Figure 4 The arrows indicate the direction of airflow. The inner diameter of the inner tube assembly 202 gradually decreases towards the air outlet, forming a return end 203 with an opening. Multiple guide ribs 204 are provided on the inner wall of the return end 203. The guide ribs 204 are located on the circumferential outer side of the air inlet of the motor 31. They are used to guide the motor cooling airflow parallel to the axis of the motor 31 and smoothly pass into the air inlet of the motor 31, avoiding the formation of obstructed airflow between the air inlet of the motor 31 and the housing 221. Obstructed airflow would prevent the motor cooling airflow from entering the air inlet of the motor 31.

[0030] Specifically, the guide rib 204 is installed inside the housing 221. The guide rib 204 is arranged parallel to the axis of the motor 31. Under the action of air pressure difference, part of the air blown out from between the outer tube group 201 and the inner tube group 202 is effectively guided back into the return end 203 to form a motor cooling airflow. The motor cooling airflow is smoothly guided to the motor 31 through the guide rib 204, flows out from the end of the inner tube group 202 away from the return end 203, and then blown out from between the outer tube group 201 and the inner tube group 202, realizing the circulating cooling of the motor 31.

[0031] The power assembly 30 consists of a motor 31 and a fan blade 32. The fan blade 32 is connected to the output end of the motor 31 and is located on the outside of the housing 211.

[0032] Combination Figure 1 and Figure 5 An auxiliary handle 50 is rotatably mounted on the housing 10. A locking assembly is provided between the auxiliary handle 50 and the housing 10. By controlling the locking assembly, the auxiliary handle 50 can be rotated or fixed at a rotation angle.

[0033] The locking assembly includes a first locking body 61 and a second locking body 62. The second locking body 62 is screwed onto the first locking body 61 and can clamp and fix the auxiliary handle 50. The first locking body 61 can be a bolt that passes through the auxiliary handle 50 and the housing 10. The second locking body 62 is a knob structure with internal threads. By loosening and tightening the two, the housing can unlock or not unlock the auxiliary handle.

[0034] Additionally, a grip handle 11 is provided on the housing 10, the battery pack 40 is located below the grip handle 11, and an air inlet shroud 70 is provided on one side of the battery pack 40, the air inlet shroud 70 being connected to the outer tube assembly 201.

[0035] The center of gravity axis of the battery pack 40 intersects the axial center line of the handle 11 at point 1. The horizontal straight-line distance d2 between point 1 and the rotation center point of the auxiliary handle 50 is 200-600mm. The vertical straight-line distance d3 between point 1 and the highest point of the auxiliary handle 50 is 50-200mm. At the same time, the rotation center point of the auxiliary handle 50 is located at the front end of the center of gravity of the motor 10. When the user uses the hair dryer, the blowpipe 80 naturally forms a certain angle with the ground. When the hair dryer is started, the airflow provides thrust to the fan, thereby reducing the burden on the user.

[0036] Furthermore, the horizontal straight-line distance d1 between the end face of the air intake shroud 70 and the end face of the housing 10 closest to its axial position is 10-80mm, ensuring that air can be drawn into the duct assembly 20.

[0037] The examples, embodiments, and special forms of this utility model have been shown and described in detail in the accompanying drawings and foregoing description, and should also be considered illustrative rather than restrictive. The description of a particular feature in one embodiment does not imply that those particular features must be limited to that one embodiment. Features of one embodiment can be used in combination with features of other embodiments, as will be understood by those skilled in the art, whether or not explicitly stated. Exemplary embodiments have been shown and described, and all variations and modifications fall within the spirit of this utility model and are intended to be protected.

Claims

1. A handheld hair dryer, comprising a housing (10), a duct assembly (20), a power assembly (30), and a battery pack (40), wherein the duct assembly (20) provides airflow, the power assembly (30) drives the airflow, the duct assembly (20) includes an outer tube assembly (201) and an inner tube assembly (202) disposed within the outer tube assembly (201), and a motor (31) in the power assembly (30) is disposed within the inner tube assembly (202), characterized in that, The inner diameter of the inner tube assembly (202) gradually decreases towards the air outlet and forms a return end (203) with an opening. Multiple guide ribs (204) are provided on the inner wall of the return end (203). Part of the air blown out between the outer tube assembly (201) and the inner tube assembly (202) flows back to the return end (203) to form a motor cooling airflow. The motor cooling airflow flows out from the end of the inner tube assembly (202) away from the return end (203). The guide ribs (204) make the motor cooling airflow parallel to the axis of the motor (31).

2. A handheld hair dryer according to claim 1, characterized in that, The duct assembly (20) includes a collector (21) and a rectifier (22) arranged coaxially. A housing 1 (211) is provided inside the collector (21), and a housing 2 (221) is provided inside the rectifier (22). The outer walls of the collector (21) and the rectifier (22) form an outer tube assembly (201). The housing 1 (211) and the housing 2 (221) are paired to form an inner tube assembly (202). The guide rib (204) is provided inside the housing 2 (221).

3. A handheld hair dryer according to claim 2, characterized in that, The power assembly (30) also includes a fan blade (32), which is connected to the output end of the motor (31) and located on the outside of the housing (211).

4. A handheld hair dryer according to claim 1, characterized in that, An auxiliary handle (50) is rotatably provided on the housing (10). A locking component is provided between the auxiliary handle (50) and the housing (10). By controlling the locking component, the auxiliary handle (50) can be rotated or fixed at a rotation angle.

5. A handheld hair dryer according to claim 4, characterized in that, The locking assembly includes a locking body one (61) and a locking body two (62), the locking body two (62) being screwed onto the locking body one (61) and capable of clamping and fixing the auxiliary handle (50).

6. A handheld hair dryer according to claim 4, characterized in that, A grip handle (11) is provided on the housing (10), and the battery pack (40) is located below the grip handle (11).

7. A handheld hair dryer according to claim 6, characterized in that, An air inlet shroud (70) is provided on one side of the battery pack (40), and the air inlet shroud (70) is connected to the outer pipe assembly (201).

8. A handheld hair dryer according to claim 6, characterized in that, The center of gravity axis of the battery pack (40) intersects the axial center line of the grip handle (11) at point 1. The horizontal straight-line distance between point 1 and the rotation center point of the auxiliary handle (50) is 200-600mm, and the vertical straight-line distance between point 1 and the highest point of the auxiliary handle (50) is 50-200mm.

9. A handheld hair dryer according to claim 7, characterized in that, The horizontal straight-line distance between the end face of the air inlet shroud (70) and the end face of the housing (10) closest to its axial position is 10-80mm.

10. A handheld hair dryer according to claim 1, characterized in that, The duct assembly (20) is provided with a blowpipe (80) at the air outlet.

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