Handheld blower

Abstract

Provided in the present utility model is a handheld blower, comprising: a housing assembly, which is internally provided with a first assembly chamber and a second assembly chamber located below the first assembly chamber; a grip handle, which is connected to the housing assembly and held by an operator; a battery pack, which is assembled in the first assembly chamber and located below the grip handle; and a blowing assembly, which comprises an impeller, an electric motor and a duct assembly assembled in the second assembly chamber, and an air output pipe connected to the housing assembly, wherein the housing assembly is provided with an air inlet; the air output pipe is provided with an air outlet; and the air inlet, the second assembly chamber and the air outlet are in communication with each other to form an airflow channel. In the air intake direction of the blowing assembly, the first assembly chamber and the second assembly chamber partially overlap vertically, and there is a distance between a lower wall surface of the first assembly chamber and the centerline of the duct assembly. Compared with the prior art, the handheld blower of the present utility model not only has better balance, but also has a compact layout, and can also ensure sufficient air intake volume.

Description

Handheld blower TECHNICAL FIELD

[0001] The utility model relates to a handheld blower, belonging to the garden tool technical field. BACKGROUND

[0002] It is known that the handheld blowers currently sold and used in the market generally use 220V alternating current power, and the structure mainly comprises a motor, a fan blade, a blowing and suction pipe and an operating handle, and wind power is generated by rotating the fan blade driven by the motor, so as to achieve the purpose of air supply. The handheld blower is mainly used for indoor use, mainly for dust removal, and is widely used in repair industry, industrial and mining enterprises and other industries, and is simple to operate and convenient to use.

[0003] However, in order to ensure high-power output, the battery pack capacity required by the existing handheld blower is large. The battery pack capacity is closely related to the weight of the battery pack, that is, the larger the battery pack capacity, the heavier the weight, which will cause the handheld blower to be unbalanced.

[0004] Therefore, it is necessary to improve the existing handheld blower to solve the above problems.

[0005] CONTENT OF THE UTILITY MODEL

[0006] The utility model discloses a handheld blower, which places the battery pack below the holding handle and partially sinks into the airflow passage area, so that the handheld blower has better balance and compact layout, and can also ensure sufficient air intake.

[0007] To achieve the above purpose, the utility model provides a handheld blower, which comprises:

[0008] A casing assembly is internally provided with a first assembly groove and a second assembly groove located below the first assembly groove;

[0009] A holding handle is connected with the casing assembly and held by the operator;

[0010] A battery pack is assembled in the first assembly groove and located below the holding handle; and

[0011] A blowing assembly comprises a fan blade, a motor and a duct assembly assembled in the second assembly groove, and an air outlet pipe connected with the casing assembly, the casing assembly is provided with an air inlet, the air outlet pipe is provided with an air outlet, the air inlet, the second assembly groove and the air outlet are communicated with each other to form an airflow passage;

[0012] Wherein, in the air inlet direction of the air blowing assembly, the first assembly slot and the second assembly slot are partially overlapped, and a distance exists between the lower wall of the first assembly slot and the center line of the duct assembly.

[0013] As a further improvement of the utility model, the shell assembly is provided with a first air inlet communicating the outside with the first assembly slot and a first air outlet communicating the first assembly slot and the second assembly slot, and the battery pack is provided with a second air inlet and a second air outlet, the second air inlet is oppositely arranged with the first air inlet and communicates with each other, and the second air outlet is oppositely arranged with the first air outlet and communicates with each other.

[0014] As a further improvement of the utility model, the opening direction of the first assembly slot is away from the air outlet, so that the battery pack is inserted into the first assembly slot along the air inlet direction.

[0015] As a further improvement of the utility model, the first air inlet is arranged on the side of the shell assembly facing the holding handle.

[0016] As a further improvement of the utility model, the handheld hair dryer further comprises a control panel and a noise reduction sponge, the control panel is arranged close to the holding handle, and the noise reduction sponge is arranged at the air inlet and below the control panel.

[0017] As a further improvement of the utility model, the side of the control panel facing the noise reduction sponge is provided with a cooling fin, the side of the noise reduction sponge facing the control panel is correspondingly provided with an opening, and the cooling fin is at least partially exposed to the opening.

[0018] As a further improvement of the utility model, one end of the noise reduction sponge close to the air inlet is defined as a starting end, one end of the duct assembly close to the air inlet is defined as an air inlet end, and the distance between the starting end and the air inlet end in the air inlet direction is greater than 80 mm.

[0019] As a further improvement of the utility model, the ratio of the maximum power of the handheld hair dryer to the weight of the battery pack is between 0.5 and 1.6, and the ratio of the maximum blowing force of the handheld hair dryer to the weight of the battery pack is between 5 and 18.

[0020] As a further improvement of the utility model, a mesh cover is arranged at the air inlet, and the ratio of the air inlet area of the mesh cover to the cross-sectional area of the duct assembly in the vertical direction perpendicular to the air inlet direction is greater than 1.4.

[0021] As a further improvement of the utility model, the duct assembly comprises a metal duct surrounding the outer periphery of the motor, and the fan blade is a metal fan blade.

[0022] The hand-held hair dryer has good balance by placing the battery pack below the holding handle. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a structural schematic diagram of a hand-held hair dryer according to the preferred embodiment of the present application.

[0024] Fig. 2 is an exploded view of the hand-held hair dryer shown in Fig. 1.

[0025] Fig. 3 is a sectional view of the hand-held hair dryer shown in Fig. 1.

[0026] Fig. 4 is a structural schematic diagram of the hand-held hair dryer shown in Fig. 1 with the hair dryer assembly removed.

[0027] Fig. 5 is a structural schematic diagram of Fig. 4 with the battery pack removed.

[0028] Fig. 6 is an exploded view of Fig. 4.

[0029] Fig. 7 is another angle view of the battery pack in Fig. 6.

[0030] Fig. 8 is an airflow flow diagram at the battery pack.

[0031] Fig. 9 is an exploded view of Fig. 5 with the mesh cover removed.

[0032] Fig. 10 is a further exploded view of Fig. 9.

[0033] Fig. 11 is an airflow flow diagram at the control board.

[0034] Fig. 12 is a structural schematic diagram of another embodiment of the hand-held hair dryer according to the present application. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be described in detail below with reference to the drawings and specific embodiments.

[0036] As shown in Fig. 1, the present application discloses a hand-held hair dryer 100 for hand-held use. The hand-held hair dryer 100 comprises a casing assembly 1, a holding handle 2, a battery pack 3 and a hair dryer assembly 4. The holding handle 2 is connected to the casing assembly 1 for an operator to hold.

[0037] It needs to be explained that: the "upper and lower" in the utility model are all in the angle of the handheld hair dryer 100 horizontally placed on the ground (such as figure 1), when the position of the handheld hair dryer 100 changes, the position relationship of "upper and lower" will also adaptively change.

[0038] As shown in figures 2 and 3, the shell assembly 1 comprises a first shell 11 and a second shell 12 assembled with each other, and the first shell 11 and the second shell 12 are assembled to form a first assembly groove 13 and a second assembly groove 14 located below the first assembly groove 13.

[0039] The blowing assembly 4 comprises a fan blade 41, a motor 42 and a duct assembly 43 assembled in the second assembly groove 14, and an air outlet pipe 44 connected with the shell assembly 1. The shell assembly 1 is provided with an air inlet 10, the air outlet pipe 44 is provided with an air outlet 440, the air inlet 10, the second assembly groove 14 and the air outlet 440 are communicated with each other to form an airflow channel.

[0040] In the embodiment, in the air inlet direction of the blowing assembly 4, the first assembly groove 13 and the second assembly groove 14 are partially overlapped, and there is a distance B between the lower wall of the first assembly groove 13 and the center line of the duct assembly 43, and the distance B is greater than 0mm.

[0041] The battery pack 3 is assembled in the first assembly groove 13 and located below the holding handle 2. In this way, on the one hand, the handheld hair dryer 100 can have better balance; on the other hand, the battery pack 3 can be partially sunken into the second assembly groove 14 (i.e. the area of the air inlet channel), not only making the internal layout of the handheld hair dryer 100 compact, but also ensuring sufficient air inlet amount. In addition, when the handheld hair dryer 100 works, the fan blade 41 can drive external air to flow in the airflow channel and take away the heat in the battery pack 3.

[0042] As shown in figures 4 and 5, specifically, the opening direction of the first assembly groove 13 is away from the air outlet 440, so that the battery pack 3 is inserted into the first assembly groove 13 along the air inlet direction. The side of the first assembly groove 13 away from the air inlet 10 is provided with a plug seat 131, which is used for electrically connecting with the battery pack 3 after the battery pack 3 is inserted into the first assembly groove 13, and supplying power for the handheld hair dryer 100 by the battery pack 3.

[0043] The first assembly slot 13 is provided with a release button 132 on the side close to the air inlet 10 and a pop-up structure 133 on the side away from the air inlet 10. The release button 132 is arranged at the top edge of the shell assembly 1 and is used to abut against the battery pack 3 when the battery pack 3 is assembled into the first assembly slot 13, so that the battery pack 3 cannot be separated from the first assembly slot 13; and is also used to separate from the battery pack 3 when the battery pack 3 needs to be taken out, so that the battery pack 3 is released. The pop-up structure 133 is accommodated in the first assembly slot 13 and is used to provide an elastic force for the battery pack 3 when the battery pack 3 is released, so as to help the battery pack 3 to be easily popped out of the first assembly slot 13.

[0044] In other words, when the battery pack 3 is assembled in the first assembly slot 13, the battery pack 3 is electrically connected with the tab seat 131, the release button 132 abuts against the battery pack 3, and the pop-up structure 133 is compressed; when the battery pack 3 needs to be taken out, the release button 132 is operated to separate from the battery pack 3, at this time, the battery pack 3 is popped out of the first assembly slot 13 under the restoring force of the pop-up structure 133, so as to facilitate the operator to take out the battery pack 3.

[0045] As shown in FIGS. 6-8, the shell assembly 1 is also provided with a first air inlet 15 communicating with the outside and the first assembly slot 13 and a first air outlet 16 communicating with the first assembly slot 13 and the second assembly slot 14. The battery pack 3 is provided with a second air inlet 31 and a second air outlet 32, the second air inlet 31 is arranged opposite to the first air inlet 15 and communicates with each other, and the second air outlet 32 is arranged opposite to the first air outlet 16 and communicates with each other. In this way, when the motor 42 is started, a negative pressure can be formed inside the handheld hair dryer 100, so as to force the airflow from the outside to enter the first assembly slot 13 from the first air inlet 15, then enter the battery pack 3 from the second air inlet 31, drive the heat in the battery pack 3 to flow out from the second air outlet 32, and then flow into the second assembly slot 14 from the first air outlet 16, and then flow out following the airflow in the airflow channel, so as to achieve the effect of heat dissipation of the battery pack 3.

[0046] In this embodiment, the first air inlet 15 is arranged on the side of the shell assembly 1 facing the holding handle 2, so as to form forced convection and natural convection at the first air inlet 15, so as to strengthen the heat dissipation of the battery pack 3 and achieve better heat dissipation effect. Of course, in other embodiments, the first air inlet 15 can also be arranged on the side wall of the shell assembly 1, which is not limited here.

[0047] As shown in FIGS. 9-11 and in combination with FIGS. 2 and 3, the handheld hair dryer 100 further comprises a control panel 17 and a noise reduction sponge 18 assembled in the second assembly groove 14. The control panel 17 is arranged close to the holding handle 2 for controlling the working state of the handheld hair dryer 100. The noise reduction sponge 18 is arranged at the air inlet 10 and below the control panel 17, so as to not only reduce noise, but also dissipate heat from the control panel 17 by the noise reduction sponge 18.

[0048] Specifically, the side of the control panel 17 facing the noise reduction sponge 18 is provided with a heat sink 171, and the side of the noise reduction sponge 18 facing the control panel 17 is correspondingly provided with an opening 181, and the heat sink 171 is at least partially exposed to the opening 181, so that when external airflow enters the airflow channel from the air inlet 10, it will pass through the opening 181 and carry away the heat on the heat sink 171, thereby dissipating heat and cooling the control panel 17. Optionally, the noise reduction sponge 18 is arranged in close contact with the inner circumferential wall of the second assembly groove 14 and is divided into a first portion 182 close to the holding handle 2 and a second portion 183 away from the holding handle 2, and the opening 181 is formed in the first portion 182.

[0049] The end of the noise reduction sponge 18 close to the air inlet 10 is defined as a starting end, and the end of the duct assembly 43 close to the air inlet 10 is defined as an air inlet end. In the air inlet direction, there is a distance A between the starting end and the air inlet end, and the distance A is greater than 80 mm.

[0050] The duct assembly 43 comprises a duct 431 surrounding the outer periphery of the motor 42. In this embodiment, the duct 431 is a metal duct, and the fan blade 41 is a metal fan blade, so that the metal fan blade can withstand a higher speed, allowing the handheld hair dryer 100 to have a higher power and thus a higher wind speed and volume.

[0051] As shown in FIGS. 5 and 6, because a higher air inlet volume is required at a high speed, the handheld hair dryer 100 of the present application is provided with a mesh cover 19 at the air inlet 10, and the air inlet area of the mesh cover 19 needs to be greater than 9000 mm 2 . At the same time, in the vertical direction perpendicular to the air inlet direction, the ratio of the air inlet area (unit: mm 2 ) of the mesh cover 19 to the cross-sectional area (unit: mm 2 ) of the duct assembly 43 needs to be greater than 1.4.

[0052] The greater the overall power of the handheld hair dryer 100 is, the greater the blowing force is, and therefore the ratio between the maximum blowing force (unit: N) of the handheld hair dryer 100 and the weight (unit: Kg) of the battery pack 3 is between 5 and 18. Since the overall power is greater, in order to ensure that the overall machine has a reasonable endurance time, a battery pack 3 with a greater weight needs to be matched, and therefore the ratio between the maximum power (unit: KW) of the handheld hair dryer 100 and the weight (unit: Kg) of the battery pack 3 needs to be between 0.5 and 1.6.

[0053] As shown in FIG. 1 and FIG. 12, optionally, the air outlet pipe 44 can be a blowing pipe, can also be a blowing nozzle (as shown in FIG. 12), or can be a combination of a blowing pipe and a blowing nozzle (as shown in FIG. 1). That is, the machine shell assembly 1 of the utility model can be directly assembled with a blowing pipe, or can be directly assembled with a blowing nozzle. When the machine shell assembly 1 is directly assembled with a blowing pipe, a blowing nozzle can also be assembled at the end of the blowing pipe to adapt to different working environments.

[0054] As shown in FIG. 9 and FIG. 10 and in combination with FIG. 2, the holding handle 2 is provided with a control panel 20, and the control panel 20 is integrated with a switch trigger 21, a constant speed button 22 and an acceleration button 23. After the switch trigger 21 is pressed, the handheld hair dryer 100 can be started, and the speed of the motor 42 and the air blade 41 can be adjusted, so that the handheld hair dryer 100 enters different working states. After the constant speed button 22 is pressed, the handheld hair dryer 100 can run at a constant speed. After the acceleration button 23 is pressed, the handheld hair dryer 100 can run at the highest speed. The specific structure of the switch trigger 21, the constant speed button 22 and the acceleration button 23 can adopt the existing technical solutions, and therefore will not be described and limited in detail here.

[0055] In summary, the handheld hair dryer 100 of the utility model places the battery pack 3 below the holding handle 2, so that the handheld hair dryer 100 has good balance. In addition, the first assembly groove 13 and the second assembly groove 14 are arranged to be partially overlapped, and there is a distance between the lower wall surface of the first assembly groove 13 and the center line of the duct assembly 43, so that the battery pack 3 can partially sink into the airflow channel, especially the area of the air inlet channel, which not only has compact layout, but also can ensure sufficient air inlet amount.

[0056] The above embodiments are only used to illustrate the technical solutions of the utility model and not to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the utility model.

Claims

1. A hand-held hair dryer, characterized in that The hand-held hair dryer comprises: a casing assembly, which is internally provided with a first assembly slot and a second assembly slot located below the first assembly slot; a holding handle, which is connected to the casing assembly and is used for being held by an operator; a battery pack, which is assembled in the first assembly slot and is located below the holding handle; and a blowing assembly, which comprises a fan blade assembled in the second assembly slot, a motor and a duct assembly, and an air outlet pipe connected to the casing assembly, the casing assembly is provided with an air inlet, the air outlet pipe is provided with an air outlet, the air inlet, the second assembly slot and the air outlet are in communication with each other to form an air flow channel, wherein, in the air inlet direction of the blowing assembly, the first assembly slot and the second assembly slot are partially overlapped in the up-down direction, and there is a distance between the lower wall of the first assembly slot and the center line of the duct assembly. The casing assembly is provided with a first air inlet for communicating the outside with the first assembly slot and a first air outlet for communicating the first assembly slot with the second assembly slot, the battery pack is provided with a second air inlet and a second air outlet, the second air inlet is oppositely arranged with the first air inlet and is in communication with the first air inlet, and the second air outlet is oppositely arranged with the first air outlet and is in communication with the first air outlet.

2. The hand-held blow dryer of claim 1, wherein: The opening direction of the first assembly slot is away from the air outlet, so that the battery pack is inserted into the first assembly slot along the air inlet direction.

3. The hand-held blow dryer of claim 2, wherein: The first air inlet is arranged on the side of the casing assembly facing the holding handle.

4. The hand dryer of claim 3, wherein: The hand-held hair dryer further comprises a control board assembled in the second assembly slot and a noise reduction sponge, the control board is arranged close to the holding handle, and the noise reduction sponge is arranged at the air inlet and below the control board.

5. The hand-held blow dryer of claim 1, wherein: The side of the control board facing the noise reduction sponge is provided with a cooling fin, and the side of the noise reduction sponge facing the control board is correspondingly provided with an opening, and the cooling fin is at least partially exposed to the opening.

6. The hand dryer of claim 5, wherein: An end of the noise reduction sponge close to the air inlet is defined as a starting end, and an end of the duct assembly close to the air inlet is defined as an air inlet end, and the distance between the starting end and the air inlet end in the air inlet direction is greater than 80 mm.

7. The hand-held blow dryer of claim 5, wherein: The ratio of the maximum power of the hand-held hair dryer to the weight of the battery pack is between 0.5 and 1.6, and the ratio of the maximum blowing force of the hand-held hair dryer to the weight of the battery pack is between 5 and 18.

8. The hand-held blow dryer of claim 1, wherein: A mesh cover is arranged at the air inlet, and in the vertical direction perpendicular to the air inlet direction, the ratio of the air inlet area of the mesh cover to the cross-sectional area of the duct assembly is greater than 1.

4.

9. The hand-held blow dryer of claim 1, wherein: The duct assembly comprises a metal duct surrounding the outer periphery of the motor, and the fan blade is a metal fan blade.

10. The hand-held blow dryer of claim 1, wherein: ​

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