JP2005342334A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cyclone type vacuum cleaner improving a dust collecting efficiency of collecting dust, liquid droplets and other objects, miniaturizing the size, and dispensing with a recovery filter. <P>SOLUTION: This vacuum cleaner makes an air flow sucked by vacuum into an eddy flow by a cyclone provided in the cleaner and centrifugally separates foreign matters included in the air flow. This vacuum cleaner is provided with an inlet 18 guiding the air flow into the cleaner along the eddy flow, multicyclone part 12 comprising a cyclone 21 gradually tapered from the upper part toward the lower par and an appropriate number of cyclones 22 and 23 positioned in its inside is provided in a position where the air flow flowing from the inlet 18 flows along the outer circumferential surface, an outlet 34 is provided in the downstream side flow passage of the multicyclone part 12 in the eddy flow direction, and the outlet 34 is connected to the vacuum suction part 13 by a conduit 36. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vacuum cleaner that converts a vacuum sucked air current into a vortex by a cyclone provided in the vessel and performs a centrifugal separation action on foreign matters contained in the air current.

  Conventional dust removal methods include a filtration method using a filter (filter method), a water film passage, a droplet passage, a wet roll filter passage, and the like, an adsorption method (electrostatic method) that is an electrode plate adsorption method by static electricity, In addition, there is a centrifugal type (cyclonic type) using a swirling flow, and in a large-scale facility such as a factory plant, it is possible to compensate for the disadvantages by combining several methods and to perform very effective dust removal. On the other hand, in a vacuum cleaner having a limited size, it is difficult to desire high dust collection efficiency. However, among the dust removal methods described above, the centrifugal type does not require any maintenance because it has no moving parts, can be used for both dry and wet conditions, and can collect a large amount of dust, and is also applied to vacuum cleaners. Yes.

  In general, the collection rate in a cyclone becomes better as the size becomes smaller, and as shown in FIG. 6, the efficiency can be expected to increase even if the cyclone c is a triple type or a multiple type. Become. However, if the dust concentration is very high, or if the size of the suction object may change significantly, a multi-stage and multi-row configuration is used as shown in FIG. You will have to use it. In addition, in this case, since the collection efficiency and the pressure loss are proportional to each other, it is necessary to prepare for a significant increase in the pressure loss. Not only this but the difficulty of constructing a vacuum cleaner using many cyclones c1, c2, c3 of various sizes as shown in FIG.

  On the other hand, there is a special table 2003-524522 which can be considered to be related to the invention of a vacuum cleaner using a cyclone, and in the specification and conventional technology column of the same issue, it is arranged inside the primary cyclone dust collecting part. Since there is a description on a multi-cyclone dust collector having a secondary cyclone dust collector, and the secondary cyclone dust collector is disposed inside the primary cyclone dust collector, the allowable amount of dust collected by the primary cyclone dust collector The amount of excess dust that exceeds the permissible dust collection capacity of the secondary cyclone dust collector passes through the secondary cyclone dust collector and flows into the fan motor. Is described. It is an object of the invention of the same issue to solve these problems and prevent the fan motor from being damaged by allowing the primary cyclone dust collecting section to collect not only a maximum amount of foreign matter but also fine dust. . However, in the case of the invention of the same issue, the idea is to bother reducing the efficiency and stopping the inflow of foreign matter to the fan motor, and there is room for improvement in the cyclone in the prior art of the same issue.

Special table 2003-524522

  The present invention has been made paying attention to the above points, and its problem is that it improves the dust collection efficiency of dust and droplets and other objects, can be downsized, and does not require a recovery filter. It is to provide a vacuum cleaner.

  In order to solve the above-described problems, the present invention provides a vacuum cleaner that vortexes a vacuum sucked airflow with a cyclone provided in the vessel and performs a centrifugal separation action on foreign matters contained in the airflow. An inlet that introduces airflow into the container is provided along the vortex, and a cyclone that tapers from the top to the bottom at a position where the airflow flowing in from the inlet flows along the outer peripheral surface, A multiple cyclone unit consisting of an arbitrary number of cyclones located was installed, an outlet was provided in the flow direction downstream of the multiple cyclone unit in the vortex direction, and an outlet was connected to the vacuum suction unit by a pipe line. Is.

  The vacuum cleaner according to the present invention implements a cyclone type dust removal method according to the above-mentioned classification, and removes or collects foreign matters contained in the airflow by centrifugal separation. For this reason, the object to be collected is not limited to a solid, but also includes liquids such as droplets and oil droplets. The collection container for storing the foreign matter collected by the cyclone preferably has a cylindrical portion for providing the cyclone, and the airflow from which the foreign matter is separated through the cyclone inlet and the cyclone inlet The outlet for discharging the gas to the outside is positioned relatively above the cyclone, and the separated collection object is stored at the bottom of the collection container.

  The cyclone in the present invention is installed as a multiple cyclone unit. The multiple cyclone portion first requires a first cyclone that tapers from the top to the bottom, and also requires any number of at least one cyclone provided so as to overlap the inside. These two or more cyclones are arranged by shifting the neck of the smallest diameter located at the lower end of the conical surface up and down in the airflow direction, so that even the cyclone located at the inner side and downstream can retain sufficient capturing ability. To. In order to form an overflow by this cyclone, the inflow port is provided in the overflow direction, and the outermost cyclone, that is, the first cyclone is located at a position where the airflow flowing in from the inflow port flows along the outer peripheral surface. Is arranged.

  As described above, the multiple cyclone portion in the present invention is constituted by a minimum of two, preferably three or more cyclones. However, the plurality of cyclones means a tapered shape. It is desirable that the shape is substantially similar, and the downstream one is smaller than the upstream one. Further, the inclination angle from the central axis of the conical surfaces constituting the plurality of cyclones is such that the first cyclone has the steepest inclination and gradually becomes a gentle inclination. In the present invention, it is desirable that the cyclones are provided so as to overlap with each other. However, the overlapping means that, among the two cyclones, the cone of the downstream cyclone is within the cone of the upstream cyclone. It can be said that the neck of the sword enters, so to overlap means more closely. If they are too close and overlapped, the airflow will pass without expecting the cyclone effect, and if they are too far away, the cyclone effect will not be expected and the dust collection efficiency will be reduced. It must be in a positional relationship.

  In order to compensate for the pressure loss that affects the strength of overflow in the multiple cyclone section, an outlet is provided in the flow path downstream of the multiple cyclone section in the overflow direction. The outflow port is connected to the vacuum suction part by a pipe line, greatly affecting the suction of the airflow that has reached the outflow port with strong vacuum suction energy, and maintains the highest centrifugal action by the vacuum suction part. To do. The downstream flow path in which the outflow port is provided needs to have a cylindrical inner peripheral surface like the collection container. Moreover, the vacuum suction part which is a power source of the vacuum cleaner according to the present invention may be provided integrally with the multiple cyclone part (example shown in FIG. 1), or may be provided separately from the multiple cyclone part (see FIG. Example 2).

  The vacuum cleaner according to the present invention is characterized in that a multiple cyclone portion is provided in the recovery container, but in addition to the multiple cyclone portion, another small cyclone can be provided. This small cyclone is provided as a centrifugal separation means in the final stage, and is provided in a pipe line connecting the outlet and the vacuum suction unit.

  Since the present invention is configured and operates as described above, high dust collection efficiency can be realized in a small vacuum cleaner, and since a filter is not required, pressure loss is suppressed and high suction performance is maintained. It is possible to do so, and it is very easy to open the collection container for discarding the collected matter, so that it is possible to reliably collect regardless of solid or fluid.

  Hereinafter, the present invention will be described in more detail with reference to illustrated embodiments. FIG. 1 relates to an integrated vacuum suction device 10, and shows an example 1 in which a collection container 11, a multiple cyclone unit 12 and a vacuum suction unit 13 are stacked and integrated.

  The recovery container 11 is a cylindrical container having a bottom 14 and an opening edge 15, and has a structure and strength to support the vacuum suction part 13 and the multicyclone part 12 placed on the opening edge 15. The multiple cyclone portion 12 has an outer cylinder 17 having a flange portion 16 mounted on the opening edge 15 of the recovery container 11, and the air flow is introduced into the outer cylinder 17 by adjusting the direction along the vortex formed inside. An inflow port 18 is provided. The outer opening of the inflow port 18 is a connection port 19 for connecting the proximal end of a suction hose having a suction nozzle or the like at the tip.

  The multiple cyclone unit 12 is provided with a first cyclone 21 having a tapered shape provided at a position where the airflow flowing in from the inlet 18 turns, and a taper provided so as to overlap the inner side and the downstream side (upward) of the first cyclone 21. A second cyclone 22 having a shape and a third cyclone 23 having a tapered shape provided so as to overlap the inner side and the downstream side (upward) of the second cyclone 22 are configured. The minimum neck 24 of the first cyclone 21 is located below the inlet 18, the minimum neck 25 of the second cyclone 22 is substantially at the same position as the end 26 of the first cyclone 21, and the minimum neck 27 of the third cyclone 23 is located. Are arranged at substantially the same position as the end 28 of the second cyclone 22 so as to overlap each other. Further, in the first to third cyclones, the inclination angle from the central axis of the conical surface is set so that the first cyclone 21 has the steepest inclination, and the second cyclone 22 and the third cyclone 23 have a gentle inclination in that order. . Further, it is assumed that the minimum neck portions 24, 25, and 26 of the cyclones 21, 22, and 23 are along the conical curved surface 20 and are gradually narrowed down (a chain line in FIG. 1).

  Structurally, the three cyclones 21, 22, and 23 are made of independent members, the first cyclone 21 is placed on the opening edge 30 of the outer cylinder 17 by the outer peripheral flange 29, and the second cyclone 22 is the outer peripheral flange 31. Is superimposed on the flange 29 of the first cyclone 21. Further, the third cyclone 23 is attached to a cover portion 33 having a flange 32 extending in the direction of the opening edge 30 of the outer cylinder 17 due to its small diameter, and the flange 32 is overlapped with the flange 31 of the second cyclone 22. Structure. The cover part 33 is closed at the upper surface by the mounting table 35 of the vacuum suction part 13, and an outlet 34 in the vortex flow direction opens on the inner peripheral surface of the cover part 33.

  The outflow port 34 and the vacuum suction unit 13 are connected to each other by a pipe line 36, and the pipe line 36 is provided with a cyclone part that is smaller than the smallest cyclone 23 of the multiple cyclone part 12. This small cyclone 37 has a structure having a single cyclone 38, and is provided for the purpose of capturing fine particles equal to or more than the filter, so that the filter is unnecessary in the present invention. The vacuum suction unit 13 is a turbo fan, which is a type of centrifugal fan, and is attached to the mounting table 35 and has an exhaust port 39 for discharging the vacuumed airflow.

  FIG. 2 relates to a separate type vacuum suction device 40, and shows a second example in which the recovery container 41 and the multiple cyclone unit 42 have an integral structure, but the vacuum suction unit 43 has a separate structure. Except for the different structure, Example 1 and Example 2 have substantially the same configuration, and an inlet in the vortex flow direction is provided inside an outer cylinder 47 having a flange portion 46 mounted on the opening edge 45 of the recovery container 41. 48 is provided, and the airflow introduced from the connection port 49 is centrifuged by the multiple cyclone unit 42 including the first cyclone 51, the second cyclone 52, and the third cyclone 53. The relationship between the minimum neck portion 54 of the first cyclone 51, the minimum neck portion 55 of the second cyclone 52, and the minimum neck portion 57 of the third cyclone 53 is the same as in the case of the first cyclone. The minimum neck 54 of 51 is provided with a diaphragm. The first and second cyclones 51 and 52 are mounted on the opening edge 60 of the outer cylinder 47 by outer flanges 59 and 61, and the cover portion 63 to which the third cyclone 53 is attached is further mounted by the flange portion 62.

  Although the outflow port 64 is the same as that of Example 1 in that it is directed in the direction of the vortex flow, it is provided at two positions 180 degrees apart from the top surface of the outer cylinder, not the inner peripheral surface of the outer cylinder. The outlets 64, 64 communicate with each other by a vacuum suction part 43 and a pipe 66, and a small cyclone 67 is provided in the pipe 66. The small cyclones 37 and 67 shown in FIG. 1 and FIG. 2 have a single cyclone 68, but it is of course possible to configure this by a plurality of cyclones. FIG. 3 shows an example of a small cyclone 77 having two cyclones 71. Airflow is introduced between the outer periphery of both cyclones 71 and 71 and the inner periphery of the case from an inlet 72 protruding upward, and the separated matter is put into the case. After dropping to the bottom 74 of 73 and 73, the pipe 66 is reached from the downward outlet 75 through the passages in both cyclones.

  The operation of the vacuum cleaner 10 of the present invention will be described with reference to FIG. 4 shown in the same structure as in the example of FIG. 2. The air flow sucked through the connection port 49 gives a swirl speed through the inlet 48. The foreign matter that has lost its momentum while flowing along the conical surface of the first cyclone 51 adheres to the conical surface, or falls from the first cyclone 51 and accumulates on the bottom 44 of the recovery container 41. The airflow that has passed through the first cyclone 51 becomes an overflow along the conical surface of the second cyclone 52, and the foreign matter that has lost its momentum adheres to the conical surface of the second cyclone 52 or falls from the second cyclone 52. The third cyclone 53 is also subjected to the same separation action by centrifugal separation, and receives a very effective foreign substance removal action while receiving a total of three stages of processing. 2 and, therefore, the pair of two outlets 64 and 64 in the example of FIG. 4 are effective in suppressing the decrease in the turning speed and realizing high-efficiency collection.

  It is noted that 99.9% of wheat flour having a particle size of 40 to 130 μm was collected by suction using the suction cleaner 40 of Example 2 of the present invention. Further, the remaining 0.1% can be collected by the small cyclone 67, and it can be said that the collection rate of 100% is achieved for the above particle diameter. However, there is a part that has escaped collection of particles having a particle size of less than 40 μm. In addition, when the example of the pressure loss at the time of the operation | work by the vacuum suction machine 40 which concerns on this invention is shown by FIG. 5, the pressure head value in the upstream of the small cyclone 67 which has a single cyclone is 250-260 mm (P3), and a small cyclone. It was 130-140 mm (P2) between 67 and the multiple cyclone part 42, and it was 50 mm (P1) near the 1st cyclone 51 in a collection container. Although not shown in the drawings, a sealing ring is provided at a joint portion between the container and the cover to ensure airtightness.

The longitudinal cross-sectional view which shows Example 1 of the vacuum cleaner which concerns on this invention. The longitudinal cross-sectional view which shows Example 2 similarly. A is a front view showing an example of a small cyclone, B is a side view, and C is a bottom view. FIG. 6 is an operation explanatory diagram of the present invention according to Example 2. The general view of the vacuum cleaner which concerns on this invention, and the flowchart for description of the pressure loss of each part. Explanatory drawing which showed the example of the conventional multistage cyclone. Explanatory drawing which similarly showed the other example of the conventional multistage cyclone.

Explanation of symbols

10, 40 Vacuum cleaner 11, 41 Recovery container 12, 42 Multiple cyclone part 13, 43 Vacuum suction part 17, 47 Outer cylinder 18, 48 Inlet 21, 51 First cyclone 22, 52 Second cyclone 23, 53 Third Cyclone 24, 25, 27, 54, 55, 57 Minimum neck 33, 63 Cover 34, 64 Outlet 36, 66 Pipe 37, 67, 77 Small cyclone 38, 68 Cyclone

Claims (3)

A vacuum cleaner that evacuates the vacuum-sucked airflow with a cyclone installed in the chamber and centrifuges the foreign substances contained in the airflow, and vortexes the inlet that introduces the airflow into the chamber. A multi-cyclone part consisting of a cyclone tapering from the upper part to the lower part and an arbitrary number of cyclones located inside it at the position where the airflow flowing in from the inlet flows along the outer peripheral surface. A vacuum cleaner having a configuration in which an outlet is provided in the flow path downstream of the multiple cyclone portion in the vortex direction, and the outlet is connected to the vacuum suction portion by a pipe line. The multiple cyclone section is composed of a first cyclone provided at a position where the airflow flowing in from the inflow port swirls, and an arbitrary number of substantially similar cyclones provided so as to overlap the inner side and the downstream side of the first cyclone. A vacuum cleaner according to claim 1. The vacuum cleaner according to claim 1, wherein the outlet and the vacuum suction part are connected by a pipe line, and the pipe line is provided with a cyclone that is smaller than the cyclone of the multiple cyclone part.

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