Entropy reduction pressure relief blower

Abstract

The invention relates to the technical field of gardening tools, and particularly discloses an entropy reduction pressure relief blower which comprises a machine shell, a blowing pipe connected with the machine shell, a motor contained in the machine shell and fan blades driven by the motor, and is characterized in that a pressure relief structure is arranged at the air outlet end of the blowing pipe and is used for reducing static pressure of the tail end area of the blowing pipe, and the blowing pipe is connected with the fan blades. The pressure relief structure comprises at least one pressure relief hole distributed in the circumferential direction or the axial direction of the blowpipe. The air blowing system can be prevented from entering an unstable state, normal operation of air blowing is guaranteed, meanwhile, the air speed and thrust of the air outlet are increased, and noise is reduced.

Description

Technical Field

[0001] This invention relates to the field of garden tool technology, specifically to an entropy-reducing and pressure-relieving blower. Background Technology

[0002] Garden hair dryers, as one of the core power tools in modern garden maintenance, primarily use a motor to drive a fan impeller to rotate at high speed, generating a powerful high-speed airflow. This airflow's kinetic energy is used to sweep and gather fallen leaves, weeds, debris, snow, and other waste. However, traditional hair dryers have difficulty handling damp, heavy leaves and have a limited operating area. To address this, the diameter of the air outlet can be reduced to increase the airflow velocity. This increased velocity is particularly effective for handling wet, heavy leaves, and the high-speed airflow has a longer effective range, allowing users to complete cleaning tasks over a larger area, reducing movement frequency and improving work efficiency. This is especially suitable for large courtyards, parks, and public green spaces. However, reducing the outlet diameter may cause pressure instability inside the blowpipe, preventing airflow from passing smoothly through the blowpipe and affecting normal use. Summary of the Invention

[0003] The purpose of this invention is to provide an entropy-reducing and pressure-relieving hair dryer to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: an entropy reduction and pressure relief blower, comprising a housing, a blowpipe connected to the housing, a motor housed within the housing, and fan blades driven by the motor, characterized in that the air outlet end of the blowpipe is provided with a pressure relief structure, the pressure relief structure being used to reduce the static pressure in the end region of the blowpipe, the pressure relief structure including pressure relief holes distributed along the circumference or axial direction of the blowpipe, and the number of such holes being at least one.

[0005] Furthermore, the pressure relief structure also includes a nozzle, which is coaxially connected to the air outlet end of the blowpipe, and the pressure relief hole is opened around the pipe wall of the nozzle.

[0006] Furthermore, the pressure relief hole extends along the axial direction or circumferential direction of the nozzle.

[0007] Furthermore, the mouthpiece is detachably sleeved on the blowpipe, and the mouthpiece gradually converges from the end near the blowpipe to the end away from the blowpipe.

[0008] Furthermore, an air multiplier shell is fitted on the outside of the blowpipe or mouthpiece, forming an air replenishment channel between the air multiplier shell and the blowpipe or mouthpiece. The air multiplier shell is used to guide the airflow blown out of the pressure relief hole into the main airflow blown out of the blowpipe or mouthpiece, and to draw in external gas into the main airflow.

[0009] Furthermore, it also includes a collector housed within a casing, wherein the motor and fan blades are housed within the duct of the collector.

[0010] Furthermore, the current collector has a cable channel through which the power supply line of the power supply unit passes.

[0011] Furthermore, the gas replenishment channel gradually narrows and then widens from the side where the gas is inhaled to the side where the gas is exhaled.

[0012] Furthermore, the blades of the fan blade are arc-shaped, and the thickness of the blade gradually increases from both ends to the middle. Both the fan blade and the motor are located on the axis of the blowpipe.

[0013] Furthermore, the air inlet end of the blowpipe is connected to the housing, and the inner diameter of the air inlet end of the blowpipe is larger than the inner diameter of its air outlet end.

[0014] The present invention has the following beneficial effects: This invention increases the air outlet area by using a pressure relief structure, reduces the static pressure at the air outlet, reduces the back pressure on the upstream airflow, facilitates the smooth flow of gas, prevents the blowing system from entering an unstable state, ensures normal blowing, and at the same time increases the air velocity and thrust at the air outlet while reducing noise.

[0015] This invention uses an air multiplier shell to guide the depressurized airflow into the main airflow and to draw in external gas through the principle of air multiplication, thereby increasing the air volume. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an overall schematic diagram of the entropy reduction and pressure relief blower in Example 1; Figure 2 for Figure 1 A schematic diagram of airflow direction in cross-section; Figure 3 for Figure 1 A schematic diagram showing the connection between the blowpipe and the mouthpiece; Figure 4 for Figure 1 An enlarged diagram of the mouthpiece; Figure 5 This is an enlarged schematic diagram of the mouthpiece in Example 2; Figure 6 This is a schematic diagram of the airflow direction after the mouthpiece and blowpipe are connected in Example 2.

[0018] Figure label: Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 like Figures 1-4 As shown, the entropy reduction and pressure relief blower in this embodiment mainly includes a housing 10, a blowpipe 20 connected to the housing 10, a motor 30 housed in the housing 10, a fan blade 40 driven by the motor 30, and a collector 70 in the housing 10. The motor 30 and the fan blade 40 are housed in the duct of the collector 70. The collector 70 has a cable groove through which the power cord of the motor 30 passes. Correspondingly, the housing 10 is provided with a gripping part 11, and the housing 10 has a cavity for installing a battery pack 12.

[0021] Specifically, the air outlet end of the blowpipe 20 is provided with a pressure relief structure 50. The pressure relief structure 50 is used to reduce the static pressure in the end area of ​​the blowpipe 20. The pressure relief structure 50 includes pressure relief holes 51 distributed circumferentially along the blowpipe 20 and a nozzle 52. The nozzle 52 is coaxially connected to the air outlet end of the blowpipe 20. The pressure relief holes 51 are opened around the pipe wall of the nozzle 52. There is at least one pressure relief hole 51, and the pressure relief holes 51 extend along the axial direction of the nozzle 52.

[0022] Here, the mouthpiece 52 is detachably sleeved on the blowpipe 20. The mouthpiece 52 gradually converges from the end near the blowpipe 20 to the end away from the blowpipe 20. A generally T-shaped buckle 521 extends from the mouthpiece 52. Two limiting protrusions 21 are provided at corresponding positions on the blowpipe 20. The two limiting protrusions 21 can abut against both sides of the buckle 521 to achieve limiting and fastening with the buckle 521.

[0023] Furthermore, the blades of the fan blade 40 are arc-shaped, and the blade thickness gradually increases from both ends to the middle. Both the fan blade 40 and the motor 30 are located on the axis of the blowpipe 20, and the air inlet end of the blowpipe 20 is connected to the housing 10. The inner diameter of the air inlet end of the blowpipe 20 is larger than the inner diameter of its air outlet end.

[0024] Example 2 like Figures 5-6As shown, the difference from Embodiment 1 is that an air multiplier shell 60 is sleeved on the outside of the mouthpiece 52. An air replenishment channel 61 is formed between the air multiplier shell 60 and the mouthpiece 52. The air multiplier shell 60 is used to guide the airflow blown out of the pressure relief hole 51 into the main airflow blown out of the mouthpiece 52, and to draw in external gas into the main airflow. The direction of the airflow is shown by the arrow. The shape of the air multiplier shell 60 is also gradually converging and is generally consistent with the mouthpiece 52.

[0025] Furthermore, the air supply channel gradually narrows and then widens from the side that draws in gas to the side that draws out gas, and is roughly the narrowest in the middle. The side that draws out gas is slightly smaller than the side that draws in gas. This design can enhance the air multiplication effect and further increase the air volume.

[0026] Furthermore, the nozzle 52 and the air multiplier shell 60 can be integrally formed or detachable structures with plug-in connection. The nozzle 52 and the air multiplier shell 60 are provided with multiple partitions for support and connection. The axial length of the air multiplier shell 60 is less than the axial length of the nozzle 52. The axial length of the pressure relief hole 51 does not exceed the axial length of the air multiplier shell 60. The partition part extends to the outside of the air multiplier shell 60, and the height of the part extending to the outside gradually decreases, forming an angled structure to increase the stability of the structure.

[0027] The hair dryers in Examples 1 and 2 were tested against conventional hair dryers, and the test data are compared as follows: It can be seen that the outlet air velocity and noise performance in Examples 1 and 2 are superior to those of existing conventional hair dryer structures.

[0028] Of course, it should be noted that the nozzle can also be omitted, and the pressure relief hole 51 and the air multiplier shell 60 can be directly set at the air outlet of the blowpipe 20 to achieve the same effect.

[0029] Furthermore, the pressure relief hole 51 can be distributed circumferentially along the nozzle or blowpipe and extended axially as in Examples 1-2, or it can be distributed axially and extended circumferentially.

[0030] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An entropy-reducing and pressure-relief blower, comprising a housing, a blowpipe connected to the housing, a motor housed within the housing, and fan blades driven by the motor, characterized in that, The air outlet end of the blowpipe is provided with a pressure relief structure, which is used to reduce the static pressure in the end area of ​​the blowpipe. The pressure relief structure includes pressure relief holes distributed along the circumference or axial direction of the blowpipe, and the number is at least one.

2. The entropy-reducing and pressure-relieving hair dryer according to claim 1, characterized in that: The pressure relief structure also includes a nozzle, which is coaxially connected to the air outlet end of the blowpipe, and the pressure relief hole is opened around the pipe wall of the nozzle.

3. The entropy-reducing and pressure-relieving hair dryer according to claim 2, characterized in that: The pressure relief hole extends along the axial direction or circumferential direction of the nozzle.

4. The entropy-reducing and pressure-relieving hair dryer according to claim 2, characterized in that: The mouthpiece is detachably fitted onto the blowpipe, and the mouthpiece gradually converges from the end near the blowpipe to the end away from the blowpipe.

5. The entropy-reducing and pressure-relieving hair dryer according to claim 2, characterized in that: An air multiplier shell is fitted on the outside of the blowpipe or mouthpiece, forming an air replenishment channel between the air multiplier shell and the blowpipe or mouthpiece. The air multiplier shell is used to guide the airflow blown out of the pressure relief hole into the main airflow blown out of the blowpipe or mouthpiece, and to draw in external gas into the main airflow.

6. The entropy-reducing and pressure-relieving hair dryer according to claim 1, characterized in that: It also includes a collector housed within a casing, with the motor and fan blades housed within the collector's duct.

7. The entropy-reducing and pressure-relieving hair dryer according to claim 6, characterized in that: The collector has a cable channel through which the power supply line of the motor passes.

8. The entropy-reducing pressure-relieving hair dryer according to claim 5, characterized in that: The gas replenishment channel gradually narrows and then widens from the side where gas is inhaled to the side where gas is exhaled.

9. The entropy-reducing and pressure-relieving hair dryer according to claim 1, characterized in that: The blades of the fan blade are arc-shaped, and the thickness of the blades gradually increases from both ends to the middle. Both the fan blade and the motor are located on the axis of the blowpipe.

10. The entropy-reducing pressure-relieving hair dryer according to claim 1, characterized in that: The air inlet of the blowpipe is connected to the housing, and the inner diameter of the air inlet of the blowpipe is larger than the inner diameter of its air outlet.

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