Portable hair drier

Abstract

The utility model relates to a portable blower, and belongs to the technical field of electric tools. The blower comprises a duct assembly and a motor arranged in the duct assembly, and fan blades and a flow guide cone are installed at the two ends of the motor respectively. The flow guide cone comprises a flow guide cover and an air guide part fixedly connected with one end of the flow guide cover, an air suction port is formed between the air guide part and the flow guide cover, and an air outlet is formed between the motor and the fan blades. The air suction port is formed between the air guide part and the flow guide cover, and the air outlet is formed between the motor and the fan blades; when main airflow in the air passage passes through the air outlet, high-speed flowing air can generate low pressure at the air outlet, so that an adsorption effect is generated, air in the air outlet flows outwards, and meanwhile, at least part of the main airflow is turned under the influence of the air guide part to enter the flow guide cover from the air suction port, flows through the motor and then flows out from the air outlet; therefore, cooling airflow is formed, heat generated by the motor is taken away, the cooling airflow can be better generated without changing the fan blade structure, and the blowing efficiency of the blower is not affected.

Description

Technical Field

[0001] The utility model relates to a blowing and cleaning device, in particular to a portable hair dryer, belonging to the technical field of tools. Background Art

[0002] A portable hair dryer is a commonly used cleaning device for gardens and other places, which is used to blow away cut grass clippings or fallen leaves. It has high working power, and the heat generated by the motor during operation is large, and the temperature rise of the motor also increases accordingly. Working under the condition of elevated temperature for a long time leads to a significant reduction in the reliability and life of the motor. Therefore, the heat dissipation problem of the hair dryer is particularly critical. In the prior art, its typical structure is disclosed by the Chinese patent application number 201820653035.9, including a front guide cone and fixed static blades, the front guide cone is arranged between the fan and the air outlet, and the ventilation holes are arranged through the fan axis direction. The front guide cone includes an air guide portion close to the air outlet, and the air guide portion is provided with air guide holes, and a cooling channel for cooling the AC brushless motor is formed between the ventilation holes and the air guide holes. Since the airflow in the guide cone in the prior art can only be passively sucked out by the main airflow after cooling the motor, the method of relying solely on the suction and exhaust of the main airflow will not be able to meet the motor heat dissipation needs with the trend of large blowing force and large flow, and the airflow in the guide cone is prone to accumulation, resulting in the heat of the motor cannot be effectively discharged.

[0003] In addition, the Chinese patent application number 202223470169.2 discloses a fan assembly, which includes a hub connected to the motor shaft and a first blade extending from the hub to the air duct, and a plurality of support ribs arranged in the hub at intervals and a plurality of second blades connected to the support ribs, wherein the second blades rotate around the same axis as the first blades, thereby guiding the auxiliary airflow entering the power assembly into the air duct and merging into the main airflow. Since the fan assembly in the prior art generates the main airflow and the auxiliary airflow at the same time, it is easy to affect the blowing efficiency of the hair dryer. Utility Model Content

[0004] The purpose of the utility model is to provide a portable hair dryer with a simple structure and efficient motor heat dissipation method in view of the shortcomings of the above-mentioned prior art.

[0005] In order to achieve the above objectives, the basic technical solution of the portable hair dryer of the utility model is as follows: comprising a duct assembly and a motor arranged in the duct assembly, with fan blades and guide cones respectively installed at both ends of the motor;

[0006] The feature is that the guide cone comprises a guide cover and an air guide portion fixedly connected to one end of the guide cover, an air intake is formed between the air guide portion and the guide cover, and an air outlet is formed between the motor and the fan blade.

[0007] Since an air intake is formed between the wind guide part and the air guide cover, and an air outlet is formed between the motor and the fan blades, when the main airflow in the air passage passes through the air outlet, the high-speed flowing gas will generate low pressure at the air outlet, thereby generating an adsorption effect and causing the air in the air outlet to flow outward. At the same time, at least part of the main airflow is turned under the influence of the wind guide part to enter the inside of the air guide cover through the air intake, flow through the motor and then flow out from the air outlet, thereby forming a cooling airflow, thereby taking away the heat generated by the motor. The cooling airflow can be better generated without changing the fan blade structure, and the blowing efficiency of the hair dryer is not affected.

[0008] The utility model is further improved in that: the diameter of the air guide cover near the air inlet end is D, the maximum radial dimension of the outer periphery of the air guide portion is H, and the outer periphery dimension H of the air guide portion satisfies: H>D.

[0009] A further improvement of the utility model is that the size difference between the outer peripheral size H of the air guide portion and the diameter D of the air guide cover is greater than or equal to 1 and less than or equal to 2 mm.

[0010] A further improvement of the utility model is that: the air guide portion is conical or flat.

[0011] A further improvement of the utility model is that the hair dryer also includes a control handle located above the main body, a battery pack detachably installed at the end of the handle, and a controller arranged in the end of the handle, the end of the handle is provided with an opening, and the main body and the duct assembly form a gap channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0014] Figure 2 yes Figure 1 A cross-sectional view of a partial structure of an embodiment.

[0015] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional decomposition structure of the local structure. DETAILED DESCRIPTION Embodiment 1

[0016] The overall structure of the portable hair dryer in this embodiment is as follows Figure 1As shown, it is mainly composed of a control handle 2 located above the main body 1, a duct assembly 3 located inside the main body, a battery pack 4 detachably mounted at the handle end 2-1, and a hair dryer 5 extending from one end of the main body 1. The main body 1 includes a shell 1-1, and the front and rear ends of the shell 1-1 are respectively provided with an air inlet 1-2 and an air outlet 1-3, and a receiving portion is formed.

[0017] like Figure 2 and Figure 3 As shown, the duct assembly 3 is arranged in the accommodating part of the main body 1, and the motor 7 is fixed in the duct assembly 3 by a plurality of guide ribs uniformly distributed in the circumference and extending radially. The fan blade 6 coupled to the motor 7 is installed at one end, and the guide cone 8 fixedly connected to the motor 7 is installed at the other end. The motor 7 can drive the fan blade 6 to form a main airflow X from back to front in the main body 1. An air inlet cover 9 is fixedly installed at the air inlet 1-2, and the air outlet is detachably connected to the hair dryer 5, and an air passage is formed between the opening 9-1 of the air inlet cover 9 and the nozzle 5-1 of the hair dryer 5.

[0018] like Figure 2 , Figure 3 As shown, the guide cone 8 includes a guide cover 8-1 and a guide portion 8-2 fixedly connected to one end of the guide cover 8-1 by screws on the side close to the air outlet 1-3, and an air inlet 10 is formed between the guide portion 8-2 and the guide cover 8-1. The guide portion 8-2 and the guide cover 8-1 are not limited to being fixedly connected by screws in the example, and can also be integrally formed. The other end of the guide cover 8-1 is fixedly connected to the motor 7, and an air outlet 11 is formed between the motor 7 and the fan blade 6. When the main airflow X in the air passage passes through the air outlet 11, the airflow at the air outlet 11 has a higher flow rate, and a negative pressure is formed at the air outlet 11 relative to the surrounding of the air outlet 11, which can accelerate the flow rate of the surrounding gas, thereby forming a cooling airflow Y flowing from the air outlet 11 to the air passage; at the same time, at least part of the main airflow X is turned from the air intake port 10 to enter the inside of the air guide 8-1 under the influence of the air guide 8-2, and flows out from the air outlet 11 after passing through the motor 7, thereby forming a cooling airflow Y to take away the heat generated by the motor 7. The diameter of the air guide 8-1 near the air intake port end is D, and the maximum radial dimension of the outer periphery of the air guide 8-2 is H. The outer peripheral dimension H of the air guide 8-2 satisfies: H>D, and the size difference between the outer peripheral dimension H of the air guide 8-2 and the diameter D of the air guide 8-1 is preferably within a range greater than or equal to 1 and less than or equal to 2 mm. The shape of the air guide 8-2 is not limited to Figure 3 The cone shape shown may also be other shapes such as a flat plate.

[0019] like Figure 2 As shown, the hair dryer further includes a controller 12, which is used to control the working state of the hair dryer. The controller 12 is arranged in the handle end 2-1. Figure 1The handle end 2-1 shown is provided with an opening 2-2, and the opening 2-2 is arranged on both sides near the controller 12. The housing 1-1 and the duct assembly 3 form a gap channel 1-4, and the airflow in the gap channel 1-4 near the air outlet 1-3 has a higher flow rate, and a negative pressure is formed in the gap channel 1-4, so as to accelerate the flow rate of the surrounding gas, forming a heat dissipation airflow Z in the gap channel 1-4 flowing to the air outlet 1-3; the heat dissipation airflow Z flows from the opening 2-2 into the main body 1 through the gap channel 1-4 to the air outlet 1-3, driving the airflow near the controller 12 to flow, thereby dissipating the heat of the controller 12, which can protect the controller 12, extend the service life of the controller 12, ensure the normal operation of the whole machine and extend the service life of the whole machine.

[0020] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A portable hair dryer, comprising a duct assembly and a motor arranged in the duct assembly, wherein a fan blade and a guide cone are respectively installed at both ends of the motor; Features: The guide cone includes a guide cover and an air guide portion fixedly connected to one end of the guide cover, an air intake port is formed between the air guide portion and the guide cover, and an air outlet port is formed between the motor and the fan blade.

2. The portable hair dryer according to claim 1, characterized in that: The diameter of the air guide cover near the air inlet is D, the maximum radial dimension of the outer circumference of the air guide portion is H, and the outer circumferential dimension H of the air guide portion satisfies: H>D.

3. The portable hair dryer according to claim 2, characterized in that: The difference between the outer circumference size H of the air guide portion and the diameter D of the air guide cover is greater than or equal to 1 and less than or equal to 2 mm.

4. The portable hair dryer according to claim 3, characterized in that: The hair dryer also includes a control handle located above the main body, a battery pack detachably mounted at the end of the handle, and a controller disposed in the end of the handle. The end of the handle is provided with an opening, and the main body and the duct assembly form a gap channel.

Images