Garden hair dryer

Abstract

A garden blower includes a handle housing and a duct arranged in a longitudinal direction, the duct defining a longitudinal axis in the longitudinal direction. The garden blower includes an airflow forming device including a fan and a motor driving the fan in rotation. The airflow forming device is arranged at an angle relative to the duct. The airflow forming device can also be located within the duct, with an output shaft of the motor located on the longitudinal axis. A duct guiding structure having a hollow interior is provided within the duct, the duct guiding structure defining a channel having a double-layer structure together with the duct. The duct guiding structure has a first guiding surface directing airflow generated by the airflow forming device to an interior of the channel.

Description

Technical Field

[0001] This invention relates to hair dryers, and more particularly to hair dryers used in gardening. Background Technology

[0002] Garden hair dryers are mainly used to blow away fallen leaves, dust, stagnant water, and snow. A hair dryer has a fan and a motor that drives the fan; the generated airflow travels through the hair dryer's air guide channel. In recent years, air guide channels with guiding surfaces exhibiting the Coanda effect have been used to deliver greater airflow and speed. However, the existing air guide channels with guiding surfaces are not suitable for garden hair dryers with long air ducts.

[0003] One of the objectives of this invention is to design a garden hair dryer that can utilize the Coanda effect guiding surface to increase the air volume and air speed of the garden hair dryer. Summary of the Invention

[0004] The present invention aims to provide a garden hair dryer that can increase air volume and air speed by utilizing a guiding surface that generates the Coanda effect.

[0005] Other objects of the invention will become apparent to those skilled in the art from the following description. Therefore, the foregoing description is not exhaustive and is merely illustrative of some of the many objects of the invention.

[0006] To achieve the above objectives, the present invention provides a garden hair dryer, including a handle housing and an air guide duct arranged in a longitudinal direction, the air guide duct defining a longitudinal axis in the longitudinal direction, the garden hair dryer including an airflow forming device, the airflow forming device including a fan and a motor for driving the fan to rotate, the airflow forming device being arranged at an angle relative to the air guide duct.

[0007] In some embodiments, the airflow forming device is located at least partially outside the air duct, preferably at least partially inside the handle housing.

[0008] In some embodiments, the air duct includes a main air inlet and a main air outlet, and the airflow forming device includes any one or both of the following: a secondary air inlet different from the main air inlet; and a secondary air outlet different from the main air outlet.

[0009] In some embodiments, the airflow forming device is located axially near the middle of the air duct, preferably in the middle third of the air duct.

[0010] In some embodiments, the garden blower also includes a fluid communication interface in fluid communication with the airflow forming device and the air duct. The fluid communication interface includes a channel with a double-layer structure and a nozzle in fluid communication with the channel. Preferably, the nozzle is oriented toward the distal side of the air duct.

[0011] In some embodiments, the channel has a generally annular or arc-shaped cross-section, and preferably the channel is coaxially arranged with the air duct.

[0012] In some embodiments, the nozzle is composed of a first guiding surface with streamlined protrusions and an opposing first mating surface. The first guiding surface guides the airflow in the channel to the outside of the channel, preferably to the air duct to travel to the far side, and more preferably to the region near the longitudinal axis of the air duct to travel to the far side.

[0013] In some embodiments, the fluid communication interface includes a second guiding surface that guides ambient air to an area near the nozzle. Preferably, the second guiding surface is located opposite the first mating surface, away from the first guiding surface. Preferably, the second guiding surface has streamlined protrusions.

[0014] In some embodiments, an auxiliary air inlet facing the surrounding environment is provided adjacent to the second guide surface.

[0015] In some embodiments, the garden hair dryer provided by the present invention includes a handle housing and an air guide duct arranged in a longitudinal direction. The air guide duct defines a longitudinal axis in the longitudinal direction. The garden hair dryer includes an airflow forming device, which includes a fan and a motor that drives the fan to rotate. The airflow forming device is located inside the air guide duct, and the output shaft of the motor is located on the longitudinal axis. An air guide structure with a hollow interior is provided inside the air guide duct. The air guide structure and the air guide duct together define a channel with a double-layer structure. The air guide structure has a first guiding surface, which guides the airflow generated by the airflow forming device into the interior of the channel.

[0016] In some embodiments, an auxiliary air inlet is provided on the air duct. The auxiliary air inlet passes through the outer and inner layers of the channel and connects the ambient air with the hollow interior of the air duct structure, but not with the interior of the channel. Preferably, the auxiliary air inlet at least partially overlaps with the air duct structure on its axis.

[0017] In some embodiments, the nozzle is located at the distal end of the channel and is in fluid communication with the channel.

[0018] In some embodiments, the distal end of the channel terminates near the distal end of the air duct, and the nozzle is composed of a second guiding surface with streamlined protrusions and an opposing first mating surface. The second guiding surface guides the airflow in the channel to the outside of the channel, preferably to the air duct to travel distally, and more preferably to the region near the longitudinal axis of the air duct to travel distally.

[0019] In some embodiments, the channel is provided with a streamlined protrusion of a third guiding surface, which guides the airflow inside the channel, and the third guiding surface is arranged opposite to the second guiding surface in a staggered manner. Attached Figure Description

[0020] The foregoing and other features of the invention will become apparent from the following description of preferred embodiments provided by way of example only and in conjunction with the accompanying drawings, in which:

[0021] Figure 1 A schematic diagram of a garden hair dryer according to an embodiment of the present invention is shown;

[0022] Figure 2 An exploded view of a garden hair dryer according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of an airflow forming apparatus according to an embodiment of the present invention is shown;

[0024] Figure 4A A schematic diagram is shown showing an airflow forming device, at least partially arranged in a handle housing, according to an embodiment of the present invention.

[0025] Figure 4B A schematic diagram is shown showing an airflow forming device, at least partially arranged in a handle housing, according to an embodiment of the present invention.

[0026] Figure 5 A cross-sectional view of a channel and a nozzle according to an embodiment of the present invention is shown;

[0027] Figure 6 A cross-sectional view of the channel and nozzle along the X-axis according to an embodiment of the present invention is shown;

[0028] Figure 7 A schematic diagram of a first auxiliary air inlet according to an embodiment of the present invention is shown;

[0029] Figure 8 A schematic diagram of an airflow forming device located in a duct according to an embodiment of the present invention is shown;

[0030] Figure 9 A schematic diagram of an air duct according to an embodiment of the present invention is shown;

[0031] Figure 10 A cross-sectional view of the channel and nozzle along the X-axis according to an embodiment of the present invention is shown. Detailed Implementation

[0032] In the following claims and the foregoing description of the invention, the word “comprising” or its variations (e.g., “including” or “containing”) is used in an inclusive manner, except where the context requires otherwise due to the language of expression or necessary implication, i.e., to indicate the presence of the stated feature but not to exclude the presence or addition of additional features in various embodiments of the invention.

[0033] For example, the terms “horizontal,” “vertical,” “lateral,” “longitudinal,” “above,” “below,” and similar terms used herein are intended to describe the invention in the orientation in which it is normally used, and are not intended to limit the invention to any particular orientation.

[0034] It should be understood that if any prior art publications are cited in this document, such references do not constitute an acknowledgment that such publications form part of common general knowledge in any country or art.

[0035] The following description is in conjunction with the accompanying drawings and embodiments.

[0036] Figure 1 A schematic diagram of a garden hair dryer 100 (hereinafter referred to as hair dryer 100) according to an embodiment of the present invention is shown. Hair dryer 100 includes a handle housing 110 and an air guide 120 arranged in a longitudinal direction, which defines a longitudinal axis X-axis. For ease of explanation, the positive direction of the X-axis is defined as "far side," and the negative direction as "near side"; "far end" refers to the farthest position of a component, "near end" refers to the closest position of a component; and "center" refers to the area of ​​the component surrounding the longitudinal axis. The handle housing 110 may have various configurations to provide sufficient space to accommodate the components therein, facilitate gripping, balance weight, etc. Figure 1 In the illustrated embodiment, the handle housing 110 is coupled to a rechargeable battery. The power source of this invention includes, but is not limited to, AC power, rechargeable batteries, etc. The handle housing 110 has various control keys, which may include the power switch, speed adjustment, and other additional functions of the hair dryer 100. For ease of operation, the longitudinal axis of the air duct 120 may extend slightly towards the ground as needed. The hair dryer 100 typically has a long air duct 120. In some embodiments of this invention, the length L of the air duct 120 along its longitudinal axis is three times or more, or four times or more, or five times or more, the average outer diameter of its cross-section perpendicular to the longitudinal axis. The air duct 120 may be configured with the same radial dimension on both the proximal and distal sides, or with the radial dimension gradually decreasing from the proximal to the distal side.

[0037] Figure 2 An exploded view of a hair dryer 100 according to an embodiment of the present invention is shown. The handle housing 110 can be attached to the air duct 120 by a mechanism common in the art. Figure 2In the illustrated embodiment, the handle housing 110 is attached to the air duct 120 via a lower collar 112, but other connection methods are also possible. In some embodiments, the handle housing 110 and the interior of the air duct 120 have a communicating channel to allow air from the air duct 120 to cool electronic devices within the handle housing 110, such as a control circuit board (not shown). It is understood that the control circuit board may also be located in other locations. The air duct 120 may be integrally formed. To save storage space, the air duct 120 may also be composed of at least two detachable parts. Figure 2 In the illustrated embodiment, the air duct 120 comprises four parts: an air inlet duct 122 providing a main air inlet 310 at its proximal end, a first air duct 124, an intermediate connecting duct 126, and a second air duct 128 providing a main air outlet 330. These four parts can be joined together using common joining methods in the art. An air duct extending along its axis X is defined within the air duct 120. The handle housing 110 can be integrally formed or assembled from multiple different parts.

[0038] Figure 3 A schematic diagram of an airflow forming apparatus 200 according to an embodiment of the present invention is shown. The airflow forming apparatus 200 includes a fan 220 and a motor 210 driving the fan 220. The airflow forming apparatus 200 can be arranged in a forward (fan 220 facing the wind direction) or reverse (fan 220 away from the wind direction) configuration. The motor 210 is not limited to a brushed or brushless motor, but a brushless motor is preferred. Figure 3 In the illustrated embodiment, motor 210 is a 25000 RPM three-phase brushless motor. Those skilled in the art will understand that other types or speeds of motors can also be used. Fan 220 includes, but is not limited to, axial fans and mixed-flow fans, and fan 220 may be equipped with a flow stabilizing component. Figure 3 In the illustrated embodiment, fan 220 is an axial flow fan. The output shaft of motor 210 can be connected to the rotation shaft of fan 220 to drive fan 220 to rotate.

[0039] In conventional hair dryer designs, the airflow forming device 200 draws air in through the main air inlet 310 of the air duct 120 and blows air out through the main air outlet 330 of the air duct 120. That is, the airflow forming device 200 is entirely located within the air duct 120 and is arranged coaxially with it. This invention envisions arranging the airflow forming device 200 in a different manner. Specifically, this invention envisions arranging the airflow forming device 200 at an angle relative to the air duct 120. Alternatively, this invention envisions forming the airflow forming device 200 at least partially outside the air duct 120. Thus, the entire interior of the air duct 120 can be used to form an airflow channel. Alternatively, the interior of the air duct 120 can be fitted with a fluid communication interface according to the invention, which will be further explained below. The arrangement of the airflow forming device 200 and the configuration of the fluid communication interface bring numerous advantages to the hair dryer of this invention, including but not limited to achieving a large airflow volume in a small volume.

[0040] Figure 4A and 4B A schematic diagram is shown showing an airflow forming device 200, at least partially arranged in a handle housing 110 according to an embodiment of the present invention. The output shaft of the motor 210 forms an angle α with the longitudinal axis, defined as the angle between the positive X-axis and the negative Y-axis, where the Y-axis is located on the output shaft of the motor 210 and is positive on the side closer to the air duct 120. This angle α can be an acute angle (see [reference needed]). Figure 4B ), right angle (see Figure 4A (Even obtuse angles). In this embodiment, the main air inlet 310 remains near the blower 100, and the main air outlet 330 remains far from the blower 100. The airflow forming device 200 will have a secondary air inlet 320 different from the main air inlet 310, and / or a secondary air outlet 340 different from the main air outlet 330. The airflow forming device 200 draws in air from the secondary air inlet 320 and blows air out from the secondary air outlet 340. In some embodiments, the secondary air inlet 320 may be located at the handle housing 110, directly or indirectly exposed to ambient air. The secondary air inlet 320 is not limited to being arranged in the opposite direction along the Y-axis; for example, the secondary air inlet 320 may be located on the side of the airflow forming device 200. In some embodiments, the secondary air outlet 340 may be located in the air duct defined by the air guide 120, or in fluid communication with the air duct. As a result, the air blown out by the airflow forming device 200 enters the air duct 120, which promotes additional air to enter the main air inlet 310 and leave the main air outlet 330, thereby increasing the air volume of the blower 100.

[0041] In some embodiments, the airflow forming device 200 is located approximately at the middle of the air duct 120 in the X-axis direction. In some embodiments, the airflow forming device 200 is located approximately at a position on the X-axis at one-third of the total length L of the air duct 120 from its proximal end. Figure 8 (As shown). In other embodiments, the airflow forming device 200 is located approximately one-third of the way down the middle of the air duct 120 in the X-axis direction.

[0042] The advantage of arranging the airflow forming device 200 within the handle housing 110 is that it makes full use of the internal space of the handle housing 110. However, it is also possible to arrange the airflow forming device 200 in other ways. For example, a branch pipe can be branched off from the air duct 120, and the airflow forming device 200 can be installed in this branch pipe. Alternatively, a larger blower housing can be provided to accommodate the airflow forming device 200.

[0043] The design of this invention allows for the use of a higher-speed but smaller-sized motor (and therefore a smaller hair dryer size), while simultaneously achieving airflow and power that are comparable to or even superior to conventional hair dryers, thus achieving significant technical benefits.

[0044] In some embodiments, the air duct 120 is in fluid communication with the airflow forming device 200 at its junction with the handle housing 110, allowing the airflow generated by the airflow forming device 200 to enter the air duct 120. This junction defines a fluid communication interface. This interface may be a part of the air duct 120, a part of the handle housing 110, or both a part of the air duct 120 and a part of the handle housing 110, or a separate structure. The interface may be entirely within the air duct 120, at least partially within the air duct 120, or entirely within the handle housing 110. At least a portion of the interface has a double-layered channel 350 in fluid communication with both the airflow forming device 200 and the air duct 120, allowing the airflow generated by the airflow forming device 200 to flow into the channel 350 and then into the air duct 120. In some embodiments, the cross-section of the channel 350 may be annular, arc-shaped, or linear. For the sake of simplicity, the following description applies only to substantially annular channels. However, those skilled in the art, guided by the teachings of this invention, can also apply these teachings to channels 350 of other configurations and arrangements.

[0045] In embodiments where the channel 350 is substantially annular, this annular channel 350 may, for example, be located within and coaxially arranged with the air duct 120, and communicate with the interior of the handle housing 110 in the positive direction of the Y-axis. The channel 350 is provided with a nozzle 300, preferably oriented distally towards the air duct 120. See also... Figure 5 , Figure 5 The cross-sections of channel 350 and nozzle 300 are schematically shown, with arrows indicating the direction of airflow. Figure 6 It shows Figure 5The cross-section of the channel 350 and nozzle 300 along the X-axis in the embodiment shows details of the nozzle 300. The cross-sectional dimensions are schematic only and do not represent actual dimensions. The above description also applies to... Figure 7 and 10 .exist Figure 5 and 6 In one embodiment, the nozzle 300 is located where the channel 350 terminates at the air guide duct 120; the nozzle 300 can also be located at other positions. For example... Figure 6 As shown, the nozzle 300 is composed of a streamlined protruding first guide surface 360 ​​and a first mating surface 380. The airflow inside the channel 350 is ejected at high speed from the gap of the nozzle 300 to the outside of the channel 350. At this time, the airflow always adheres to the first guide surface 360 ​​and continues to travel to the distance in the air duct of the air guide 120 after leaving the nozzle 300.

[0046] As the airflow is ejected at high speed at nozzle 300, a low-pressure zone forms near the annular nozzle 300 up to its center. This low-pressure zone can draw ambient air near the duct 120 through the main air inlet 310 into the low-pressure zone. Figure 6 In the illustrated embodiment, the streamlined protrusion of the second guide surface 362 is optionally disposed on the opposite side of the first mating surface 380, away from the first guide surface 360. The second guide surface 362 can facilitate the flow of ambient air from the vicinity of the air duct 120 to the low-pressure area, thereby increasing the airflow.

[0047] Figure 7 It is shown that, in addition to or replacing the main air inlet 310, a first auxiliary air inlet 312 is provided immediately adjacent to the second guide surface 362 to guide ambient air circumferentially from the duct 120 into the low-pressure area. The first auxiliary air inlet 312 is capable of guiding ambient air into the low-pressure area formed by the nozzle 300. The first auxiliary air inlet 312 can be continuously distributed around the circumference of the duct 120 housing. For example, the first auxiliary air inlet 312 can be a pore array or a perforation array or any other form of opening, preferably axially symmetrical about the longitudinal axis X-axis. It is understood that when the first auxiliary air inlet 312 is not provided, the second guide surface 362 can be... Figure 5 and 6 The configuration shown. The channel 350 can be located near the middle of the air duct 120, for example, within the length of the air duct 120 that is biased towards the near or far side.

[0048] Other locations and orientations of the channel 350 are also possible. For example, the channel 350 may be located only partially in the air duct 120, or the channel 350 may be located substantially in the handle housing 110. The nozzle 300 of the channel 350 is positioned toward the air duct of the air duct 120.

[0049] exist Figure 8 In the illustrated embodiment, the airflow forming device 200 is located within the air duct 120, for example, within the intermediate connecting pipe 126 of the air duct 120, such that the output shaft of the motor 210 is located on the longitudinal axis of the air duct 120. This arrangement has the advantage that the airflow generated by the airflow forming device 200 does not undergo a large-angle turn, reducing wind force loss. In this embodiment, the main air inlet 310 is located near the end of the airflow forming device 200. Optionally, the main air inlet 310 can also be located on the side of the airflow forming device 200. Figure 5 and 6 Similar to the illustrated embodiment, at least a portion of the air duct 120 should have a double-layered channel 350 to form the nozzle 300, the channel 350 being disposed distal to the airflow forming device 200. For this purpose, an air guiding structure 390 with a hollow interior is provided in the air duct 120, the air guiding structure 390 forming the inner layer of the channel 350. The wall surface of the air duct 120 forms the outer layer of the channel 350. Figure 9 A schematic diagram of an air duct 120 according to an embodiment of the present invention is shown, wherein cross-sections of a channel 350 and a nozzle 300 are shown, and arrows indicate the direction of airflow. Figure 9 In the illustrated embodiment, the air guide structure 390 has a streamlined, protruding first guide surface 370 that guides the airflow generated by the airflow forming device 200 into the interior of the channel 350. The air guide structure 390 can also be configured in other ways. Figure 9 In one embodiment, the nozzle 300 is disposed at the distal end of the air duct 120 and is in fluid communication with the channel 350, the distal end of the channel 350 terminating at the distal end of the air duct 120. The nozzle 300 may also be disposed at other locations in fluid communication with the channel 350.

[0050] In order to guide ambient air to the central area of ​​the channel 350 (i.e., the hollow interior of the air guide structure 390) to increase the air volume, a second auxiliary air inlet 314 may be provided on the air guide duct 120. Figure 9The second auxiliary air inlet 314, shown as a row of holes, is only schematic and does not represent its actual shape and size. The second auxiliary air inlet 314 passes through the outer and inner layers of the channel 350. It connects ambient air to the central region of the channel 350 but does not connect to the interior of the channel 350, i.e., it does not enter between the outer and inner layers of the channel 350. The second auxiliary air inlet 314 can be continuously distributed around the circumference of the duct 120 housing. For example, it can be an array of pores or holes, or any other form of opening, preferably symmetrically distributed around the longitudinal axis X-axis. The function of the second auxiliary air inlet 314 is that when a high-speed airflow is ejected from the nozzle 300, a low-pressure zone is formed near the annular nozzle 300 up to its central region. Air from the central region of the channel 350 is supplied to this low-pressure zone, allowing the second auxiliary air inlet 314 to continuously replenish the central region of the channel 350 with ambient air.

[0051] Figure 10 It shows Figure 9 The cross-section of the channel 350 and nozzle 300 along the X-axis in the embodiment shows details of the nozzle 300. The nozzle 300 is formed by a streamlined, protruding second guide surface 372 and a first mating surface 382. Airflow inside the channel 350 flows adhered to the second guide surface 372 and is subsequently ejected at high speed from the slit of the nozzle 300 to the outside of the channel 350. Figure 10 In the illustrated embodiment, since the nozzle 300 is located at the distal end of the air duct 120, the airflow leaves the air duct 120 at the same time as it leaves the nozzle 300. In some embodiments, when the nozzle 300 is located near the distal side of the air duct 120, the airflow always flows along the second guide surface 372, and after leaving the nozzle 300, it continues to travel distally in the air duct 120, preferably guided to the region near the longitudinal axis X-axis of the air duct 120.

[0052] exist Figure 10In the illustrated embodiment, a streamlined protrusion of the second guide surface 372 is disposed on the outer layer of the channel 350, a first mating surface 382 is disposed on the inner layer of the channel 350, and a streamlined protrusion of the fourth guide surface 376 is optionally disposed on the opposite side of the second guide surface 372, away from the first mating surface 382. The purpose of providing the fourth guide surface 376 is to guide the ambient air near the nozzle 300 to the low-pressure area formed near the nozzle 300. In some embodiments, the second guide surface 372 may also be disposed on the inner layer of the channel 350, and the first mating surface 382 may be disposed on the outer layer of the channel 350. In this case, if the nozzle 300 is located at the distal end of the air duct 120, the fourth guide surface 376 may optionally be disposed on the opposite side of the first mating surface 382, ​​away from the second guide surface 372; that is, the fourth guide surface 376 is typically disposed on the outer side of the channel 350 that is in contact with the ambient air.

[0053] exist Figure 10 In the embodiment shown, the channel 350 is further provided with a streamlined protrusion third guide surface 374, which guides the airflow inside the channel 350. The third guide surface 374 and the second guide surface 372 are arranged opposite each other, so that the airflow inside the channel 350 can be guided twice on the guide surface with the Coanda effect, which can accelerate the flow of airflow.

[0054] In some embodiments, the first auxiliary air inlet 312 and the second auxiliary air inlet 314 may have edges that extend obliquely from the proximal side of the outer side of the air duct 120 toward the distal side of the inner side of the air duct 120, which is beneficial to ensure that the direction of the ambient air flow is consistent with the airflow within the air duct 120.

[0055] The invention has been illustrated and described in detail above with reference to the accompanying drawings, but it should be considered illustrative rather than restrictive. It should be understood that exemplary embodiments are shown and described only, and the invention is not limited in any way. It is understood that any feature described herein can be used in any embodiment. Illustrative embodiments do not exclude each other or other embodiments not listed herein. Therefore, the invention also provides combinations including one or more of the exemplary embodiments described above. Modifications and variations can be made to the invention without departing from its spirit and scope; therefore, such limitations should only be made as indicated by the appended claims.

Claims

1. A garden hair dryer, comprising a handle housing and an air guide duct arranged in a longitudinal direction, the air guide duct defining a longitudinal axis in the longitudinal direction, the garden hair dryer comprising: An airflow forming device, the airflow forming device including a fan and a motor that drives the fan to rotate, wherein the output shaft of the motor of the airflow forming device is configured to be arranged at an angle relative to the longitudinal axis of the air duct; The airflow forming device is at least partially arranged outside the air duct; The garden blower also includes a fluid communication interface that is in fluid communication with the airflow forming device and the air duct. The fluid communication interface includes a channel with a double-layer structure, and the channel is configured to allow the airflow generated by the airflow forming device to enter the air duct of the air duct through it. The fluid communication interface includes a nozzle in fluid communication with the channel, the nozzle being composed of a first guide surface having streamlined protrusions and an opposing first mating surface, the first guide surface guiding airflow within the channel to the outside of the channel.

2. The garden hair dryer as claimed in claim 1, wherein the airflow forming device is at least partially located within the handle housing.

3. The garden blower as claimed in claim 1, wherein the air duct includes a main air inlet and a main air outlet, and the airflow forming device includes any one or both of the following: a secondary air inlet different from the main air inlet; and a secondary air outlet different from the main air outlet.

4. The garden blower as described in claim 1, wherein the airflow forming device is located axially in the middle of the air guide duct.

5. The garden blower as described in claim 4, wherein the airflow forming device is located in the middle 1 / 3 section of the air guide duct along the axial direction.

6. The garden blower as claimed in claim 1, wherein the nozzle is oriented toward the distal side of the air guide duct.

7. The garden blower as claimed in claim 1, wherein the channel has an annular or arc-shaped cross-section.

8. The garden blower as described in claim 7, wherein the channel is coaxially arranged with the air guide pipe.

9. The garden blower as claimed in claim 1, wherein the first guiding surface guides the airflow in the channel to the air duct to travel to the distal side.

10. The garden blower as claimed in claim 9, wherein the first guiding surface guides the airflow within the channel to travel distally along the longitudinal axis region of the air duct.

11. The garden blower of claim 1, wherein the fluid communication interface includes a second guiding surface that guides ambient air to the area of ​​the nozzle.

12. The garden hair dryer as claimed in claim 11, wherein the second guide surface is located away from the first guide surface and on the opposite side of the first mating surface.

13. The garden hair dryer as claimed in claim 12, wherein the second guide surface has streamlined protrusions.

14. The garden blower as described in claim 11, wherein an auxiliary air inlet facing the surrounding environment is provided adjacent to the second guide surface.

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