Personal backpack fan

Abstract

The utility model provides a personal backpack type fan, and belongs to the technical field of personal protective equipment. Aiming at the problems of short service life and poor sealing performance caused by non-uniform air flow distribution of a filter element of the existing single-person fan, a three-stage cavity shell structure and a pressure equalizing type filtering system are adopted. The fan shell is composed of an inner side shell, a middle partition plate, an upper outer shell and a lower outer shell, the curvature of the inner wall of the inner side shell is matched with the waist of the human body, and the bearing pressure is reduced; the lower outer shell and the middle partition plate form an air inlet chamber, and a pressure equalizing chamber is formed between a side wall air inlet and the air inlet side of the filter element, so that airflow uniformly penetrates through the filter element, and the service life of the filter element is prolonged; the air inlet side of the filter element is positioned through a limiting bulge, and the air outlet side adopts a rubber sealing ring to form self-tightening sealing; the lower outer shell is detachable through a rotary buckle, and the air outlet end of the turbofan is connected with a quick-release connector. The filter is suitable for high-dust environments such as fire fighting and mines, and solves the problem of contradiction between the filtering efficiency and the equipment portability.

Description

Technical Field

[0001] This utility model relates to the field of portable ventilation equipment technology, and in particular to a personal backpack fan suitable for outdoor operations, emergency rescue and other scenarios. Background Technology

[0002] In high-risk dust environments such as fire fighting, mining, and chemical industries, independent fans are needed to deliver clean air to face masks. However, existing single-person fans have two major drawbacks: First, traditional equipment uses a straight-through air duct, where air passes through the air inlet, filter, and fan before being output to the face mask. This results in uneven airflow distribution on the windward side of the filter, overload damage in the central area, and shortened service life. Second, the filter relies on rigid clips for sealing with the cavity, which can create micro-gaps under vibration conditions, leading to a PM2.5 leakage rate as high as 5%.

[0003] Patent application number 202122769863.3 discloses a battery compartment structure for a portable air filtration device; it includes a housing of the portable air filtration device and a battery mechanism. The battery compartment is located at the bottom of the housing, and the lower end face of the battery compartment has an opening communicating with the outside. The battery mechanism includes a power box and a battery body. The shape of the power box of the battery mechanism fits the outline of the battery compartment of the housing. The outer wall of the power box has several buckles, and the outer wall of the battery compartment of the housing has several slots corresponding to the positions of the power buckles. The power box and the battery compartment are fixed together by the buckles and the corresponding slots. The battery body is fixedly installed in the power box, and the side wall of the power box has a socket corresponding to the charging interface position of the battery body.

[0004] However, the aforementioned technologies do not solve the technical problems existing in the prior art, nor do they provide any insights into solving these problems. There is a lack of a backpack-style air supply device that combines ergonomic design, high-efficiency filtration, and portability. Utility Model Content

[0005] The purpose of this invention is to provide a personal backpack fan to solve the problems mentioned in the background section.

[0006] (1) How to solve the problem of early failure of filter element caused by uneven airflow impact and eliminate the problem of filter element boundary leakage path.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A personal backpack fan;

[0009] Includes the fan housing, turbine fan, portable battery, and filter element;

[0010] The cavity inside the fan casing is equipped with an air inlet chamber, an air duct, a fan chamber, and a power supply chamber. The outer wall of the fan casing also has an air inlet and an air outlet that communicate with the air inlet chamber. The beginning of the air duct communicates with the air inlet chamber, and the end of the air duct communicates with the fan chamber.

[0011] The filter element is installed in the air inlet chamber, the beginning of the air duct is aligned with the air outlet side of the filter element, and the air outlet side of the filter element is sealed with the side wall of the air inlet chamber. The turbine fan is installed in the fan chamber, the air inlet of the turbine fan is connected to the end of the air duct, the air outlet of the turbine fan is aligned with the air outlet of the fan housing, and the portable battery is installed in the power supply chamber of the fan housing, which powers the turbine fan.

[0012] There is a gap between the air inlet side of the filter element and the air inlet chamber. The air inlet is located on the side wall of the fan housing, and the gap is connected to the air inlet of the fan housing.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, the filter element is a plate and frame filter element.

[0015] Furthermore, the side wall of the air inlet chamber is provided with several limiting protrusions, which abut against the air inlet side end face of the filter element.

[0016] Furthermore, a rubber sealing ring is provided between the air outlet side of the filter element and the side wall of the air inlet chamber.

[0017] Furthermore, the air outlet of the fan casing is provided with a quick-release connector that mates with the air outlet pipe of the turbine fan, and the inner wall of the quick-release connector is provided with threads for connecting to the external air duct.

[0018] Furthermore, the fan casing includes an inner casing, a middle partition, an upper casing, and a lower casing. The inner casing is fixed to the middle partition, and the upper casing is also fixed to the middle partition. The upper casing and the middle partition form the fan chamber and the power supply chamber. The lower casing and the middle partition are detachably connected, and the lower casing and the middle partition form the air inlet chamber.

[0019] Furthermore, the contour of the inner wall of the inner shell of the fan housing matches the contour of the human waist.

[0020] With this structure, the personal backpack fan forms a gap of 8-12mm between the air inlet side of the filter element and the inner wall of the air inlet chamber, forming a pressure equalization chamber; external air enters the pressure equalization chamber tangentially through the side air inlet, and after turbulence attenuation, it penetrates the filter element evenly.

[0021] Furthermore, this personal backpack fan adopts a dual-stage sealing structure. The first stage is on the air inlet side of the filter element, where a limiting protrusion constrains the displacement of the filter element. The second stage is on the air outlet side of the filter element, where a rubber sealing ring generates a self-tightening seal under the negative pressure of the fan.

[0022] The beneficial effects of this personal backpack fan are:

[0023] (1) It conforms to ergonomic design, with a waist-fitting curved surface to distribute back pressure and improve comfort;

[0024] (2) High-efficiency filtration, the multi-stage sealing structure of the filter element (limiting protrusions + sealing rings) ensures zero leakage;

[0025] (3) Quick maintenance: The removable lower housing design enables filter element replacement in seconds;

[0026] (4) Modular power supply, with an independent power supply chamber that supports hot-swappable batteries. Attached Figure Description

[0027] Figure 1 This is a front view of an embodiment of the personal backpack fan.

[0028] Figure 2 yes Figure 1 Sectional view along AA.

[0029] Figure 3 This is one of the perspective views of this personal backpack fan embodiment.

[0030] Figure 4 This is the second perspective view of this personal backpack fan embodiment (the upper and lower outer shells are omitted in the figure).

[0031] Figure 5 This is one of the perspective views of the middle partition in this embodiment of the personal backpack fan.

[0032] Figure 6 This is the second perspective view of the middle partition of this personal backpack fan embodiment.

[0033] Figure 7 This is the third perspective view of this personal backpack fan embodiment.

[0034] Explanation of the labels in the diagram:

[0035] Fan housing - 100; Inner housing - 110; Middle partition - 120; Buckle - 121; Air duct - 122; Upper housing - 131; Lower housing - 132; Fan chamber - 140; Power supply chamber - 150; Air inlet chamber - 160; Limiting protrusion - 161; Air inlet - 170; Air outlet - 180; Filter element - 200; Rubber sealing ring - 210; Turbine fan - 300; Quick-release connector - 400; Portable battery - 500. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0037] The terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] Please refer to Figures 1 through 7.

[0040] This personal backpack fan includes a fan housing 100, a turbine fan 300, a portable battery 500, and a filter element 200.

[0041] The fan housing 100 includes an inner housing 110, a middle partition 120, an upper outer housing 131, and a lower outer housing 132. The inner housing 110 is fixed to the middle partition 120, and the upper outer housing 131 is also fixed to the middle partition 120. The upper outer housing 131 and the middle partition 120 form a fan chamber 140 and a power supply chamber 150. The lower outer housing 132 and the middle partition 120 are detachably connected by a buckle 121. The lower outer housing 132 and the middle partition 120 form an air inlet chamber 160. The contour of the inner wall of the inner housing 110 of the fan housing 100 matches the contour of the human waist.

[0042] The outer wall of the fan casing 100 is also provided with an air inlet 170 and an air outlet 180 that communicate with the air inlet chamber 160. The beginning of the air duct 122 communicates with the air inlet chamber 160, and the end of the air duct 122 communicates with the fan chamber 140.

[0043] The filter element 200 is a plate and frame filter element. The filter element 200 uses PTFE-coated glass fiber filter paper with a filtration accuracy of 0.1μm. The filter element 200 is installed in the air inlet chamber 160. The beginning of the air duct 122 is aligned with the air outlet side of the filter element 200. There is a gap between the air inlet side of the filter element 200 and the air inlet chamber 160. The air inlet 170 is located on the side wall of the fan housing 100, and the gap is connected to the air inlet 170 of the fan housing 100.

[0044] External air enters the gap through the air inlet 170. External air can form a pressure equalization chamber between the air inlet side of the filter element 200 and the air inlet chamber 160. External air can enter the filter element 200 more evenly, increasing the service life of the filter element 200. The height of the pressure equalization chamber is about 10mm.

[0045] The side wall of the air inlet chamber 160 is also provided with several limiting protrusions 161, which abut against the air inlet side end face of the filter element 200. The limiting protrusions 161 can also form a flow grille. A rubber sealing ring 210 is provided between the air outlet side of the filter element 200 and the side wall of the air inlet chamber 160.

[0046] The turbine fan 300 is installed in the fan chamber 140. The air inlet of the turbine fan 300 is connected to the end of the air duct 122. The air outlet of the turbine fan 300 is aligned with the air outlet 180 of the fan housing 100. The air outlet 180 of the fan housing 100 is provided with a quick-release connector 400 that mates with the air outlet of the turbine fan 300. The inner wall of the quick-release connector 400 is provided with threads for connecting to the external air duct.

[0047] The portable battery 500 uses high-temperature resistant lithium battery cells. The capacity retention rate of the portable battery 500 is >90% under 80℃ operating conditions. The portable battery 500 is installed in the power chamber 150 of the fan housing 100. Together with the control circuit, the portable battery 500 supplies power to the turbine fan 300. The control circuit integrates a pressure sensor and automatically increases the speed to compensate for the air volume when the filter element 200 is clogged.

[0048] During assembly, the turbine fan 300 is fixed to the fan chamber 140, the quick-release connector 400 is installed on the air outlet pipe, the portable battery 500 is inserted into the slide rail groove of the power supply chamber 150, the filter element 200 is placed into the air inlet chamber 160, the limiting protrusion 161 is used to position and press the sealing ring, the lower outer shell 132 and the middle partition 120 are fastened together, and the buckle 121 between the lower outer shell 132 and the middle partition 120 is locked.

[0049] When this personal backpack fan is working, external air passes through the air inlet 170, the air intake gap, the filter element 200, the air duct 122, the turbine fan 300, and the quick-release connector 400 in sequence to output clean airflow.

[0050] The results of comparing the operation of this personal backpack fan with traditional filtration equipment are as follows:

[0051]

[0052] Note: The filter cartridge life test refers to GB / T 6165-2021, with a value of 20g / m³. ³ Lime dust load, record the time it takes for the pressure difference to rise to twice the initial value.

[0053] The above description is only one embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the principle of the present utility model, and these should also be considered to fall within the protection scope of the present utility model.

Claims

1. A personal backpack fan, characterized by: Includes a fan housing (100), a turbine fan (300), a portable battery (500), and a filter element (200); The cavity inside the fan housing (100) is provided with an air inlet chamber (160), an air duct (122), a fan chamber (140) and a power supply chamber (150). The outer wall of the fan housing (100) is also provided with an air inlet (170) and an air outlet (180) that communicate with the air inlet chamber (160). The beginning of the air duct (122) communicates with the air inlet chamber (160), and the end of the air duct (122) communicates with the fan chamber (140). A filter element (200) is installed in the air inlet chamber (160). The beginning of the air duct (122) is aligned with the air outlet side of the filter element (200), and the air outlet side of the filter element (200) is sealed with the side wall of the air inlet chamber (160). A turbine fan (300) is installed in the fan chamber (140). The air inlet of the turbine fan (300) is connected to the end of the air duct (122). The air outlet pipe of the turbine fan (300) is aligned with the air outlet (180) of the fan housing (100). A portable battery (500) is installed in the power supply chamber (150) of the fan housing (100). The portable battery (500) supplies power to the turbine fan (300). There is a gap between the air inlet side of the filter element (200) and the air inlet chamber (160), and the air inlet (170) is located on the side wall of the fan housing (100), and the gap is connected to the air inlet (170) of the fan housing (100).

2. The personal backpack fan according to claim 1, characterized in that: The filter element (200) is a plate and frame filter element.

3. The personal backpack fan according to claim 2, characterized in that: The side wall of the air inlet chamber (160) is also provided with several limiting protrusions (161), which abut against the air inlet side end face of the filter element (200).

4. The personal backpack fan according to claim 3, characterized in that: A rubber sealing ring (210) is provided between the air outlet side of the filter element (200) and the side wall of the air inlet chamber (160).

5. The personal backpack fan according to claim 1, characterized in that: The air outlet (180) of the fan housing (100) is provided with a quick-release connector (400) that mates with the air outlet pipe of the turbine fan (300). The inner wall of the quick-release connector (400) is provided with threads for connecting to the external air duct.

6. The personal backpack fan according to claim 1, characterized in that: The fan housing (100) includes an inner housing (110), a middle partition (120), an upper outer housing (131), and a lower outer housing (132). The inner housing (110) is fixed to the middle partition (120), and the upper outer housing (131) is also fixed to the middle partition (120). The upper outer housing (131) and the middle partition (120) together form a fan chamber (140) and a power supply chamber (150). The lower outer housing (132) is detachably connected to the middle partition (120), and the lower outer housing (132) and the middle partition (120) together form an air inlet chamber (160).

7. The personal backpack fan according to claim 6, characterized in that: The contour of the inner wall of the inner shell (110) of the fan housing (100) matches the contour of the human waist.

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