JPH04106615U - dust collector - Google Patents

Abstract

(57) [Summary] [Purpose] To save power and downsize the fan device by increasing its efficiency. [Structure] A casing of a fan device 44 is fixed inside a peripheral wall of an introduction chamber 23, and a discharge port 53 is formed in a peripheral wall of a casing 47. A suction duct 54 for sucking air containing dust passes through the peripheral wall of the introduction chamber 23 and is connected to the suction port 52 of the casing 47 .

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a dust collector used, for example, to collect dust from wood chips in a woodworking shop. Ru.

0002

[Conventional technology]

For example, in woodworking shops, etc., it is used to collect dust from wood chips generated by electric saws, etc. A small and relatively inexpensive dust collector called a simple dust collector is used. this species A conventional example of a dust collector is shown in FIG.

0003 The dust collector 1 includes a fan device 3 and a fan device 3 on the main body base 2. It is configured with a filtration and dust collection section 4 that filters and collects dust from the sucked air. . Among these, the fan device 3 has an impeller 6 disposed inside the casing 5 and A suction duct 7 is connected to the front surface of the casing 5, and a discharge duct 8 is connected to the peripheral wall of the casing 5. It is constructed by connecting. In addition, the filtration dust collecting section 4 has a cylindrical shape with openings on both upper and lower surfaces. A dust collection bag 10 made of filter cloth is removably attached to the lower part of the introduction chamber 9, and its introduction A bag-shaped filter 11 also made of filter cloth is attached to the upper part of the chamber 9. A discharge duct 8 of the fan device 3 is connected to a peripheral wall of the introduction chamber 9.

0004 In such a configuration, when the motor 12 of the fan device 3 is driven, the suction duct Air containing dust is sucked into the casing 5 from 7, and is passed through the discharge duct 8. and is forced into the introduction chamber 9. As a result, this introduction chamber 9 is filled with air containing dust. This creates a cyclone flow in which air rotates and rises along the inner wall surface of the introduction chamber 9. Therefore, relatively heavy dust collides with the inner surface of the peripheral wall of the introduction chamber 9 due to centrifugal force and collects below. Light dust falls into the dust bag 10 and enters the filter 11 from the introduction chamber 9 together with the air. The dust flows in, where the dust is filtered and captured, and only air is exhausted to the outside. .

[0005]

[Problem that the idea aims to solve]

However, in the above configuration, the air discharged from the casing 5 of the fan device 3 is Since it is configured to be fed under pressure into the introduction chamber 9 through the discharge duct 8, the casing pressure loss in the air discharge path (especially inside the discharge duct 8) can be avoided. I can't. For this reason, the efficiency of the fan device 3 cannot be sufficiently increased, and the power There were problems such as high consumption and the need for a large motor 12.

[0006] Therefore, the purpose of this invention is to save power by increasing the efficiency of the fan device. An object of the present invention is to provide a dust collector that can be downsized.

[0007]

[Means to solve the problem]

The dust collector of this invention circulates air containing dust using a motor-driven fan device. The air is fed into a cylindrical introduction chamber, and air is pumped inside the introduction chamber while creating a cyclone flow. The fan unit is designed to send the At the same time, the casing of the Form an outlet and pass the suction duct through the peripheral wall of the introduction chamber to the suction port of the casing. It is characterized by its connected configuration.

[0008]

[Effect]

When the motor of the fan device is driven, the dust-laden air flows through the suction duct. Inhaled into the casing. Since this casing is placed inside the introduction chamber, Air from the outlet of the casing is routed directly with minimum pressure loss in the outlet path. It is introduced into the chamber and is vigorously discharged. In addition, the casing is fixed inside the peripheral wall of the introduction chamber. Because of this, a smooth cyclone flow is generated in the introduction chamber, and relatively heavy powder is The dust collides with the inner surface of the peripheral wall of the introduction chamber due to centrifugal force and is separated from the air, and light dust is removed from the air. The air flows from the introduction chamber into the filter, where it is separated from the air.

[0009]

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

0010 FIG. 4 shows the overall configuration of the dust collector according to this embodiment. Trolley 22 with wheels 21 A cylindrical main body shell 23 is supported by four pillars 24 on the top. This main body The inside of 23 acts as an introduction chamber where air containing dust is supplied. A dust collection cylinder 25 with a tapered shape and an open bottom end is installed at the bottom, and the dust collection cylinder 25 is A dust collection bag 26 made of polyethylene, for example, is attached to the lower end of the body 25 by a one-touch band 27. It is attached removably. On the other hand, as shown in FIG. A separation cylinder 28, which also has a tapered shape that becomes narrower at the bottom, is fixed to the side, and the The end is opened so as to be diagonally sideways on the opposite side of the casing 47, which will be described later. . A sound absorbing material 29 is attached to the inner peripheral surface of the main body body 23, and a filter is attached to the upper end. A filter 30 for excessive dust collection is removably attached.

[0011] This filter 30 consists of multiple filter cloths made of nylon, Tetron, cotton, etc. It is constructed by integrally comprising a bag-like filter cloth cylinder 31 and a perforated disc 32 also made of a similar filter cloth. has been done. As shown in FIG. 5, the perforated disc 32 is used to open the It has a thin circular lid shape that covers the top end, and is evenly distributed over the entire top surface. A plurality of holes 32a are formed. Further, the inner peripheral surface of this perforated disc 32 is provided with a ferrule. A belt 33 is pasted on the outer periphery, and a string 34 for passing the band through and a string for hanging the band are attached to the outer periphery. 35 are provided.

0012 Further, the bag-like filter cloth cylinder 31 has a lower end having a diameter corresponding to the holes 32a of the perforated plate 32. It has the shape of a long bag with an opening, and its lower end is sewn into each hole 32a. It is provided integrally with the perforated plate 32. In this embodiment, the bag-like filter cloth cylinder 31 is first After forming a long cylindrical filter cloth, the central part of this cylindrical filter cloth is tied and squeezed. As a result, two adjacent bag-like filter cloth cylinders 31 are formed from one cylindrical filter cloth. There is. In addition, metal rings 36 for shape retention are provided at two locations inside each bag-like filter cloth cylinder 31. is sewn on.

[0013] The filter 30 configured in this manner has the perforated disk 32 on the upper surface of the main body 23. For example, insert a one-touch band 37 made of stainless steel through the band so as to cover it. It is attached to the upper part of the main body trunk 23 by passing the string 34 through and tightening it. It will be done. With this, the filter 30 is configured so that the inside of each bag-like filter cloth cylinder 31 is inside the main body body 23 (introduced). (chamber). Also, at this time, the The felt 33 prevents the inner peripheral surface of the perforated disc 32 from sliding against the outer wall of the main body 23. It is possible to achieve a high degree of airtightness by adhering in a state of close contact.

[0014] Note that an extendable support rod 38 is provided upright on the side of the main body trunk 23, and a support rod 38 is provided at the upper end of the support rod 38. The upper end of each bag-like filter cloth cylinder 31 of the filter 30 is can be hung. In this embodiment, this suspension mechanism 39 is an upper spring 4 whose lower end is connected to the center of the suspension ring 40; 1. A plurality of lower springs 42 whose upper ends are connected to the suspension ring 40 With the upper end of the upper spring 41 attached to the upper end of the support rod 38, each lower By connecting the lower end of the spring 42 to the upper end of each bag-like filter cloth cylinder 31, the filter The router 30 is suspended.

[0015] Now, the fan device 44 for sucking air into the main body body 23 (introduction chamber) is , a motor 45, a centrifugal impeller 46 rotationally driven by the motor 45, and the impeller and a casing 47 that covers 46. Of these, the casing 47 is made of a steel plate approximately circular. A partition disk 49 is attached to one end and the middle part of the peripheral wall body 48 which is curved into a cylindrical shape. It is configured as a circular space between partition plates 49. This casing 47 consists of A flange portion 50 is provided on the outer periphery of the peripheral wall cylinder 48 to match the curvature of the outer peripheral surface of the main body cylinder 23. is provided to the main body shell 23 via the flange portion 50 in a form that penetrates the main body shell 23. Fixed. Therefore, in the fixed state of this peripheral wall shell 48, the casing 47 is Located inside the peripheral wall inside the shell 23 (introduction chamber), the end opposite to the casing 47 At this point, the peripheral wall shell 48 is opened.

[0016] The motor 45 is mounted inside the open end of the peripheral wall body 48 via a frame 51. The rotating shaft thereof protrudes into the casing 47, and the impeller 46 is fixed thereto. ing. The center of the partition disk 49 on one end side of the casing 47 has a suction An inlet 52 is formed, and a discharge port 53 is formed in the upper part of the peripheral wall cylinder 48. Ma In addition, a suction duct is provided in the partition disc 49 of the casing 47 so as to communicate with the suction port 52. 54 is fixed, which extends linearly across the introduction chamber and penetrates the main body shell 23. There is. The tip of this suction duct 54 is connected to a suction duct placed near an electric saw (not shown) or the like. It is connected to the nozzle through a flexible hose.

[0017] Next, the operation of the above configuration will be explained.

[0018] When the motor 45 is driven, the impeller 46 rotates at high speed within the casing 47. Then, the dust generated by the electric saw is sucked into the suction nozzle along with the surrounding air. , into the center of the casing 47 via the flexible hose and the suction duct 54. drawn. As the impeller 46 rotates, this dust-laden air flows into the casing. The book is compressed to the outer periphery of the casing 47 and discharged from the outlet 53 formed in the peripheral wall of the casing 46. Cyclone flow is discharged directly into the body 23 (introduction chamber) and rises while rotating. is generated in the introduction room.

[0019] At this time, the air inside the casing 46 is directly discharged from the discharge port 53 formed in the peripheral wall thereof. Since it is directly discharged into the introduction chamber, there is extremely little pressure loss and high-speed cyclone flow is achieved. is generated. In the flow of this cyclone, relatively heavy dust particles are transported to the main body by centrifugal force. It collides with the inner surface of the peripheral wall of the shell 23 and falls, and is separated from the air. Also, light dust is Taking advantage of the flow, it passes from the center of the introduction chamber through the lower end opening of the separation shell 28 and enters the introduction chamber. The air flows into the filter 30 where it is separated from air. In this case, with use The filter 30 gradually becomes clogged, but if there are multiple filters 30, Since the bag-shaped filter cloth cylinder 31 is constructed of The filtration area is several times larger. Therefore, the decrease in suction (dust collection) efficiency due to clogging is It will be relatively gradual.

[0020] In addition, if the device becomes clogged, with the device stopped, The filter 30 is vibrated to remove dust from the filter 30. . This work is carried out by the operator using a puller connected to the suspension ring 40 of the suspension mechanism 39. This can be done by pulling the string.

[0021] According to this embodiment, the air discharged from the fan device is routed through the discharge duct. Air is discharged from the casing 47 compared to conventional products that are configured to lead the air into the introduction chamber through the The pressure loss in the path can be significantly reduced. Moreover, casing 4 7 is located at the outermost side of the introduction chamber, so the discharge port 53 The air discharged from the shaft rotates smoothly. Therefore, the low output motor 45 Therefore, a sufficiently high-speed cyclone flow can be generated, and the fan device 4 4, it is possible to increase the efficiency and reduce power consumption. This type of dust collector is generally Since the fan device 44 is operated continuously for a long time, it is possible to save energy by improving the efficiency of the fan device 44. The fruits bring great economic benefits. Also, a low output motor 45 can be used. In addition, by arranging the casing 47 inside the main body shell 23, the entire dust collector The entire dust collector can be made smaller and lighter, and as in the above embodiment, the entire dust collector can be carried on the trolley 2. 2 and can be easily moved, making it more practical. Ru.

[0022]

[Effect of the idea]

As is clear from the above explanation, according to the dust collector of the present invention, the fan device Since the air-singing is located inside the body of the main body which creates a cyclone flow of air, the There is little pressure loss in the output path, and the efficiency of the fan device is increased, resulting in power saving, small size and light weight. This has an excellent practical effect in that it can be used for various purposes.

[Brief explanation of drawings]

[Fig. 1] Partial vertical cross-sectional view showing one embodiment of the present invention

[Figure 2] Partial cross-sectional view

[Figure 3] Partial side view

[Figure 4] Overall perspective view

[Figure 5] Partial vertical cross-sectional view of the filter

[Figure 6] Side view showing a conventional dust collector

[Explanation of symbols]

23 is a main body body (introduction chamber), 26 is a dust collection bag, 29 is a sound absorbing material, 30 is a filter, 31 is a bag-like filter tube, 38 is a support rod, 39 is a suspension mechanism, 44 is a fan device, and 45 is a motor , 46 is an impeller, 47 is a casing, 52 is an inlet,
53 is a discharge port, and 54 is a suction duct.

Claims (1)

[Scope of utility model registration request] 1. Air containing dust is sent into a cylindrical introduction chamber by a motor-driven fan device, and the air is sent to a filter section connected to the introduction chamber while generating a cyclone flow within the introduction chamber. In the fan device, the casing of the fan device is fixed to the inner side of a peripheral wall in the introduction chamber, and a discharge port is formed in the peripheral wall of the casing, and a suction duct is passed through the peripheral wall of the introduction chamber to supply suction to the casing. A dust collector characterized by being connected to a mouth.