JP2008272758A - Electric air cleaner and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved air cleaning system in which a separation and an air filtration are performed combindly by using a centrifugal force so that dusts is efficiently removed from the air containing dust, and to provide a manufacturing method thereof. <P>SOLUTION: The electric air cleaner is provided with a flow passage extending from a suction port 4 of the system to a clean air discharge port, a motor-driven fan 24 is disposed along the flow passage, sucks air containing particulate dust into the suction port 4, and rotates the cleaner around the shaft to form a stratified rotation flow of the dust-containing air in which the heaviest particles gather to the outmost track. A discharge port is provided for discharging the dust-containing air to the surrounding from the rotation flow. An air filter 9 is disposed upstream of the clean air discharge port in the rotation flow, across the flow passage, and filters air from the innermost track of the stratified rotation flow. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improved electric air cleaning system for exhausting air, which efficiently removes dust from air containing dust and supplies clean air to an apparatus used with the system, and a method for manufacturing the same. For example, the present invention can be applied to any air flow technology application such as a ventilation system as a device for supplying a constant air capacity to heat exchangers, heating and air conditioning systems, etc. This is particularly useful in an internal combustion engine in which the suction force applied to the intake port to which clean air is supplied varies.

  There is known an intake port for separating particles heavier than air from the air using centrifugal force, which is used in an internal combustion engine, a ventilation system, and other devices that suck in dusty air. It is also known to use an in-line filter to purify air in a system that delivers air. However, air filters are prone to clogging with dust in the air that passes through the filter, resulting in increased resistance of the air that passes through the filter, which is controlled by electricity supplied with air through a connected device, such as a filter. The operating efficiency of an internal combustion engine or the like that is used will be reduced. Frequent filter changes and shorter service intervals are required, but this increases operating costs. There is a need for an improved air cleaning system and method of manufacture that combines centrifugal separation and air filtration to efficiently remove dust from air containing dust while reducing or avoiding the aforementioned problems. It is said that.

  The electric air cleaning system according to the present invention includes a flow path extending from an intake port in the system to a clean air discharge port. A motor-driven fan is disposed along the flow path, draws air containing granular dust into the suction port, and rotates about an axis so that the heaviest particles come to the outermost orbit. Rotating flow is formed in a laminar manner. An exhaust port is provided for exhausting air containing particulate dust from the laminar rotating flow of the system to the surroundings. An air filter is disposed upstream of the clean air outlet so as to traverse the flow path in the rotating flow, and filters air from the innermost track of the laminar rotating flow. According to a disclosed embodiment of the invention, the filter is long in the direction of the axis of rotation of air containing dust. The outer peripheral surface of the filter in the rotating flow is swept to the innermost track of the laminar rotating flow, and dust accumulation on the filter is minimized.

  In the embodiment, the system is provided with a plurality of separable parts each defining a flow path part in the system. In the two embodiments, the parts are detachably connected to each other, and the third embodiment. In FIG. 2, they are spaced apart and mounted separately and connected by an intermediate pipe assembly. This modular nature of the system of separable fan housing parts and air filter housing parts allows the system to be flexibly assembled in a limited space of system parts within the device.

  The method for producing an electric air cleaning system according to the present invention forms an electric air cleaning system as a plurality of parts that define the respective flow path portions from the inlet port to the outlet port in the system. The first part is arranged along the flow path, and the air containing granular dust is drawn from the suction port and rotated around the shaft so that the heaviest particles come to the outermost track. The second part has a separation discharge chamber downstream of the motor drive fan in the flow path and upstream of the discharge opening across the flow path in the separation discharge chamber. It has an air filter that filters air from the innermost trajectory of the stratified rotating flow and a discharge port that discharges air containing particulate dust from the stratified rotating flow of the system. The manufacturing method further includes mounting the first and second parts separately at separate locations in a device that requires a clean air supply, such as an internal combustion engine, to form part of the system flow path. Connecting the flow path across the first and second parts using a pipe assembly.

  These and other features and advantages of the present invention will become more apparent from the following description, taken in conjunction with the accompanying drawings, of three embodiments of the present invention, which are for illustration only.

  Referring now to the drawings, the motorized air cleaning system or apparatus 1 according to the first embodiment shown in FIGS. 1 to 6 can be used for an internal combustion engine or other clean air as shown schematically in FIG. It is connected to the inlet 29 of the device 28 that requires supply. The system includes a flow path 22 that extends throughout the system from the inlet 4 to a clean air outlet 5 that supplies clean air to the inlet 29 of the device 28. The flow path is disposed within a generally cylindrical housing 23 of the system. As shown in FIG. 7, the housing 23 is formed by two detachable assemblies of a motor driven fan housing 2 and a filter housing 3 that are detachably connected to each other by a connecting clip 7 at a service flange assembly 6. Has been. For this reason, the housings 2 and 3 have connecting flanges 16 and 17, respectively. In FIG. 6, the housings 2 and 3 are shown separately, and in FIGS. 8 and 9 and FIGS.

  The motor-operated fan 24 including the fan blade 10 mounted on the output shaft of the electric motor 13 draws air containing granular debris into the suction port 4 and rotates about the AA axis to make the air containing dust the heaviest. Arranged along the flow path 22 to form a rotating flow in the system that stratifies so that the particles are in the outermost orbit of the rotating flow. A compression assembly 11 in the form of an angled louver and motor mount assembly with fixed louvers or vanes 12 is located downstream of the fan blade 10 in the fan housing 2. The compression assembly compresses the volume of the rotational flow of air containing dust that is drawn into the system inlet, increasing the speed of the air and the centrifugal force on the dust floating in the air. As shown in FIGS. 3, 4 and 8, 9, the motor driven fan 24 is supported by a motor 13 in the fan housing via an angled louver and motor mount assembly 11.

  As shown in FIGS. 3-6, 9, and 15, a separate exhaust chamber 18 is provided downstream of the angled louver and motor mount assembly in the flow path of the air purification system. The outermost trajectory of the rotating air flow pattern containing dust until it reaches the annular discharge port 25 formed radially outside the clean air discharge port in the vicinity of the discharge port 5 at the discharge end of the housing is separated It flows along the outer wall 27 of the discharge chamber. The discharge port is formed by a series of circumferential radial discharge grooves 8 divided by a strake 15. The exhaust port exhausts air containing particulate dust from the layered rotating flow in the system to the surroundings.

  A series of filter configurations comprising at least a primary first air filter member 20 shown in FIGS. 10 and 15 and a second safety air filter member 21 shown in FIGS. 11 and 14 optionally disposed within the filter member 20. The air filter 9 shown in FIGS. 2 to 4, 6 and 15 is arranged in the rotating flow across the flow path and upstream of the outlet, and when air flows to the clean air outlet 5, Air from the innermost trajectory of the laminar rotating flow is filtered. The filter 9 is long in the direction of the central longitudinal axis AA of the generally cylindrical housing 23 in the separation discharge chamber, and the filter 9 is mounted on the clean air discharge opening 19 as shown in FIG. It extends along the axis from the discharge end where it is located. The upstream end of the filter 9 is supported at the end of the motor 13 by a filter compression bracket 14 connected to a support flange 30 as shown in FIG.

  Accumulation of dust on the outer surface of the filter 9 is performed by disposing the filter in a rotating flow of air containing dust in the separation discharge chamber 18, and removing the air containing granular dust from the layered rotating flow in the chamber 18 at the end of the chamber. Can be minimized, for example, without disturbing the laminar rotational flow in the room. Also, the air required by the device when supplying air to the inlet 29 of the device 28 that requires a periodic air flow, such as an internal combustion engine that applies various varying suction forces to the system outlet 5. Improve the self-cleaning function of the filter 9 by operating a motor-driven fan to maintain positive airflow pressure on the outer surface of the filter at all flow speeds and to return dusty air from the system Is also accepted. The air purification system 1 is designed to generate a much larger air flow than is required by the engine or device 28 in which it is installed, and a constant positive air flow pressure on the air filter. A strong air stream is supplied from a discharge port 25 extending over 360 ° formed by a series of radial grooves 8 arranged at the end of the separation discharge chamber.

  The air purification system and method of manufacture according to the present invention provides for air filter limitations during normal service intervals of internal combustion engines and other devices by significantly extending the life of the air filter compared to current service intervals. Can be kept low. The air cleaning system and the manufacturing method thereof have been described, particularly the usage of supplying clean air to the internal combustion engine, but the present invention is not limited to this usage, and various devices that require the supply of clean air, For example, it can be widely used in ventilation systems, heat exchangers, air compressors, heating and air conditioning systems.

  Embodiment 2 of the electric air cleaning system or apparatus 31 shown in FIG. 16 is the same as the system or apparatus 1 of Embodiment 1 except for the filter housing 32 of FIG. That is, as in the first embodiment, instead of providing the exhaust port radially at the exhaust end of the filter housing and outside the clean air exhaust port, the exhaust port 33 is the outermost part of the rotational flow in the filter housing 32. It is arranged in a radial pattern facing the air filter outside the orbit. Specifically, the discharge port 33 is on the outer wall of the separation discharge chamber of the filter housing and has a groove shape along the entire length of the air filter. The discharge end portion of the housing 32 has a hard panel near the discharge port 5 and is closed, for example.

  Therefore, in Embodiment 1, the dust remains in a layered state over the entire length of the housing until it is discharged from the rear of the system or apparatus. However, in the system or apparatus 31 having the filter housing 32, the dust is outside the separation pattern. The dust is immediately discharged from the rotating flow and the system or apparatus through the discharge groove 33. This feature makes it easier to direct the dust out of the system or device and to guide the dust out of the internal combustion engine or other device in which the system or device is provided. The air filter in the filter housing 32 can also advantageously receive a slight positive pressure during use, reducing restrictions on the engine and other equipment where the system or equipment is provided.

  The other features of the present invention shown in FIG. 17 can be used in either embodiment. This feature includes the provision of a dust strake 34 on the outer periphery of the air filter 9. The strake 34 extends over the entire length along the longitudinal axis of the air filter, and extends outward from the outer periphery of the filter in the direction of the rotational flow, as represented by arrow B in FIG. Dust in the rotating flow is guided from the filter to the outermost orbit of the rotating flow and discharged from the system.

  Embodiment 3 of the electric air cleaning system or apparatus 35 shown in FIG. 18 includes a motor-driven fan housing 2 which is a detachable part, and a filter housing 3/32 (3 in FIGS. 18 and 19). Only the system or device 1 of the first embodiment, except that they are separately mounted at remote locations 36 and 37 of the device that requires a clean air supply, respectively, This is the same as the system or apparatus 31 of the second embodiment. An additional pipe assembly 38 is used to connect the separated housings together. Housings 2 and 3/32 can be removed from their respective ends of the pipe assembly to facilitate installation, assembly, and disassembly for repair and replacement of the system and its components.

  An optional feature of the system 35 shown in FIG. 19 is that a remote compression assembly in the form of a loose collar 39 having a plurality of fixed vanes 40 is provided in the flow path to guide the dusty air into a suitable rotational flow. It is to install. In other words, the compression assembly compresses the volume of the rotational flow of air containing dust, increasing the speed of the air and the centrifugal force applied to the dust floating in the air. In the embodiment, the brim collar 39 is arranged upstream of the air filter 9 in the filter housing 3/32 and supports the upstream end of the air filter instead of the filter compression bracket 14 of the first embodiment. ing. A loose collar 39 having the same or additional vanes 40 can also be mounted behind or downstream of the fan housing 2 to ensure proper rotational flow in the system 35. The system is a modular assembly system with a plurality of separate parts, each of which can be mounted separately on the device, and is flexible in adapting to complex devices that require a supply of clean air. Although only three examples of the embodiment based on the present invention have been described, it is needless to say that the present invention is not limited to these examples and various modifications and improvements can be made to the knowledge of those skilled in the art. Yes. For example, an electric air cleaning system according to the present invention separates dust from air containing dust by centrifugal force, and draws air from the innermost track of the rotating flow in the system by suction from the device at the outlet of the system. Thus, in the case where sufficient cleaning is provided, it can be used without the filter 9 for supplying air. In this regard, it is known that the pressure at the clean air outlet is essentially neutral regardless of the presence or absence of the filter 9, while the positive pressure within the device maintains the flow through the system outlet port. Upon request, the device draws clean air from the clean air outlet, for example by suction applied to the system's clean air outlet. Accordingly, it is not preferred that the invention be limited to the details described above, but that all modifications and improvements falling within the scope of the appended claims should be included.

It is the perspective view which showed the electric air cleaning system or apparatus regarding Embodiment 1 of this invention to the one direction from the inlet port front surface. FIG. 2 is a perspective view showing the air cleaning system shown in FIG. 1 in one direction from a discharge port end on the back surface, and is schematically shown connected to an intake port of a device in which an intake request amount varies. A system similar to that shown in FIG. 1 is shown with the housing partially cut away to show internal components. A system similar to that shown in FIG. 2 is shown with the housing partially cut away to show internal components. A system similar to that shown in FIG. 1 is shown with a portion of the housing and the filter in the system removed to show the clean air outlet opening through the outlet end on the back of the housing. FIG. 2 is a perspective view showing a system similar to that shown in FIG. 1, with the detachable motor-driven fan housing and filter housing forming the system housing shown separated. FIG. 6 is a partial detail view of a filter housing having a detachably connected motor-driven fan housing and a detachable connecting clip shown in FIG. 5. FIG. 2 is a perspective view of the detachable motor-driven fan housing shown in FIG. 1 in one direction from the front inlet end. FIG. 2 is a perspective view of the detachable motor-driven fan housing shown in FIG. 1 in one direction from the rear discharge port end. FIG. 2 is a perspective view of a main first air filter component used in the system shown in FIG. 1. FIG. 2 is a perspective view of a second safety air filter component optionally used within the main first air filter in the system shown in FIG. 1. It is the perspective view which showed the filter housing from the front in the state which does not install a filter. It is the perspective view which showed the filter housing from the back discharge port end in the state which does not install a filter. It is the perspective view which showed the state which installed the arbitrary filter in the filter housing shown by FIG. It is the perspective view which showed the state which installed the main filter in the filter housing shown by FIG. It is the perspective view which showed the air purifying system or apparatus regarding Embodiment 2 of this invention in one direction from the discharge port end of the back, the back panel which the filter housing continued in the vicinity of the clean air discharge port, and the full length of an air filter And a cylindrical outer wall with a long slot extending therethrough. FIG. 2 is a conceptual cross-sectional view of the disclosed embodiment as viewed at right angles to the axis A-A, and is connected to an air filter and extends over the entire length of the filter to remove dust in a rotating flow of air containing dust from the filter. Fig. 2 shows a dust streak that leads away to the outer wall of the filter housing. It is the perspective view which showed the air purifying system or apparatus regarding Embodiment 3 of this invention from one direction, and the air filter housing and the fan housing of a motor drive are separately mounted in the apparatus supplied with the air from a system separately. The two housings are connected by an intermediate pipe assembly of the system. FIG. 19 is a conceptual perspective view of the system shown in FIG. 18, showing a compression assembly positioned upstream of the air filter in the filter housing to ensure the stratification of dust-containing air in the filter housing; The axis of the flow path between the housings is shown in broken lines and the pipe assembly is not shown.

Claims (2)

An electric air cleaning system is formed as a plurality of parts each defining a flow path portion from the inlet to the outlet in the system, the parts including a first part and a second part, and the first part is the flow path The air containing particulate dust is drawn into the inlet and rotated around an axis to form a rotating flow in which the air containing the dust is layered so that the heaviest particles are in the outermost orbit. A motor-driven fan, wherein the second part is disposed in the separation discharge chamber downstream of the motor drive fan in the flow path, and in the separation discharge chamber across the flow path and upstream of the discharge port; An air filter for filtering air from the innermost track of the laminar rotating flow, and an exhaust port for discharging air containing particulate dust from the laminar rotating flow of the system;
The first and second parts are separately mounted at remote locations in a device supplied with clean air;
A method of manufacturing an electric air cleaning system comprising connecting the flow path across the first and second parts using an intermediate pipe assembly that forms part of the flow path of the system. Supplying a compression assembly upstream of the air filter of the second part to compress the volume of the rotating flow of air containing dust to increase the speed of the air and the centrifugal force on the dust floating in the air; The manufacturing method of Claim 1 containing.

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