KR20130022959A - An air purifier equipped with a spinning rotor by an electromagnetic solenoid - Google Patents

An air purifier equipped with a spinning rotor by an electromagnetic solenoid Download PDF

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Publication number
KR20130022959A
KR20130022959A KR1020110086031A KR20110086031A KR20130022959A KR 20130022959 A KR20130022959 A KR 20130022959A KR 1020110086031 A KR1020110086031 A KR 1020110086031A KR 20110086031 A KR20110086031 A KR 20110086031A KR 20130022959 A KR20130022959 A KR 20130022959A
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KR
South Korea
Prior art keywords
rotating body
air
permanent magnet
rotating
base
Prior art date
Application number
KR1020110086031A
Other languages
Korean (ko)
Inventor
정의성
Original Assignee
코웨이 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 코웨이 주식회사 filed Critical 코웨이 주식회사
Priority to KR1020110086031A priority Critical patent/KR20130022959A/en
Publication of KR20130022959A publication Critical patent/KR20130022959A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/50—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for air conditioning

Abstract

PURPOSE: An air purifier with a rotating body which rotates by a solenoid electromagnet is provided to discharge external air through the rotating body by rotating the rotating body using the interaction of the solenoid electromagnet and a permanent magnet for rotation. CONSTITUTION: An air purifier with a rotating body which rotates by a solenoid electromagnet includes a base(300) and the rotating body(200). The base is equipped with the electromagnet. The rotating body is rotatable by floating on the base. The rotating body has a permanent magnet(290) for rotation which is positioned on the opposite side of the solenoid electromagnet. External air is discharged by penetrating the rotating body as the rotating body rotates on the base using the interaction of the solenoid electromagnet and the permanent magnet for rotation.

Description

Air purifier equipped with a spinning rotor by an electromagnetic solenoid

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier, and more particularly, comprising a rotating body rotating by a solenoid electromagnet that circulates air using a magnetic levitation principle to reduce noise and vibration that may occur in a blowing fan and a rotating motor driving the same. Relates to an air purifier.

An air purifier is a device that purifies polluted air and converts it into fresh air. The air purifier removes dust and germs and removes bad smells by passing air through a filter.

Air pollution is becoming serious due to the increase of yellow dust or harmful dust, and the necessity and demand for air purifiers are greatly increased due to the increase of respiratory diseases and the increase of public interest in health.

A general air purifier includes a main body having a suction port and a discharge port formed therein, and the main body includes a blower that provides a blowing force for introducing contaminated air into the main body through the suction port and discharging the purified air to the outside of the main body through the discharge port, and the main body. It is provided with a filter for removing contaminants in the air introduced into the interior.

In addition, it is equipped with a pollution degree sensor such as a dust sensor or an odor sensor, and the air pollution level is measured by the pollution degree sensor, and if the air pollution degree is large, the output of the blower is increased to increase the air volume of the air cleaner, and if the air pollution level is low, the air blowing Lowering the output of the device reduces the airflow in the air purifier.

However, the method of controlling the air volume of the air cleaner in this way, as the air cleaner increases the air volume may generate more noise in the blowing fan and the rotating motor driving the same may cause inconvenience to the user due to noise.

In particular, when the air purifier operates in a space where a quiet environment is required, such as a bedroom or a reading room, if the air volume of the air purifier is increased according to the degree of air pollution in the room, the noise generated by the air purifier may cause the indoor atmosphere to become untidy and sleep or It can harm those who study.

In addition, in the case of using a general rotary motor to rotate the rotating body, such as a conventional air purifier, in order to increase the floating force from the conductor has a disadvantage that occupies a considerable volume because the motor used must have a high output.

On the other hand, since the air cleaner introduces the surrounding air through the blower, vibration occurs during the operation of the blower fan and the rotary motor. In particular, the air cleaner operates when the air cleaner is operated in an unstable state such as an external force applied during operation. Not only the vibration is amplified to give a discomfort to the user, when the generated vibration is increased there is a problem that the life of the components installed inside the air cleaner is shortened.

Therefore, there is a need for an air purifier having a drive means for replacing the rotary motor so as to solve the problem of shortening the lifespan of the blower fan and the rotary motor driving the conventional air purifier and the rotating motor driving the space and components.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air purifier that rotates a rotating body by an interaction between a solenoid electromagnet and a rotating permanent magnet so that external air is discharged through the rotating body.

Air purifier having a rotating body rotated by the solenoid electromagnet of the present invention for achieving the above object is a base having a solenoid electromagnet; And a rotatable body floating on the base and rotatable; The rotating body includes a rotating permanent magnet located in correspondence with the solenoid electromagnet, and by rotating the rotating body on the base by the interaction of the solenoid electromagnet and the rotating permanent magnet, external air is rotated. Characterized in that is discharged through.

An air purifier having a rotating body rotating by the solenoid electromagnet of the present invention for achieving the above object is located in the lower portion of the rotating body suction portion, the rotating body discharge portion is located above the rotating body, the rotating body The filter unit is positioned inside the air, and the air introduced into the rotating body penetrates along the rotating body suction unit, the filter unit, and the rotating body discharge unit.

The rotating body suction part of the air purifier having a rotating body rotated by the solenoid electromagnet of the present invention for achieving the above object is formed by a plurality of blades located below the rotating body, the plurality of blades when rotating It is characterized in that it is formed to be radially bent from the center of the lower surface of the rotating body suction portion to introduce air into the rotating body.

The filter part of the air purifier having a rotating body rotated by the solenoid electromagnet of the present invention for achieving the above object comprises a hepa filter, located in the mesh network inside the base, and the outside air to the base After entering and passing through the mesh network, the rotating body suction unit, the filter unit and the rotating body discharge unit are sequentially passed, and is discharged to the outside of the air cleaner.

Air purifier having a rotating body rotated by the solenoid electromagnet of the present invention for achieving the above object is located in the lower surface of the rotating permanent magnet and position permanent magnet, and the position permanent magnet Is characterized in that it has a position maintaining function of the rotating body.

The air purifier having a rotating body rotated by the solenoid electromagnet of the present invention for achieving the above object further comprises a housing located above the base, and the housing is spaced apart from the rotating body to surround the rotating body It is characterized by.

Air purifier having a rotating body rotated by the solenoid electromagnet of the present invention for achieving the above object is located in the housing opening lower side of the housing, the position of the housing opening corresponding to the position of the rotating body suction, the housing Air flowed into the rotating body through the housing opening is characterized in that.

The base of the air purifier having a rotating body rotated by the solenoid electromagnet of the present invention for achieving the above object is connected to the solenoid electromagnet portion triac for changing the N / S pole by a switching operation; And a variable resistor connected to the triac part to adjust the revolutions per minute of the rotating body.

According to the present invention, even when operating in a space requiring a quiet environment by reducing the noise generated in the blowing fan of the air cleaner and the rotating motor driving the air volume of the air cleaner according to the air pollution degree of the room without noise restrictions Can be increased.

In addition, the conventional rotary motor used to drive the rotating body of the air cleaner can prevent the increase in the volume of the rotating motor occupied in proportion to the floating force of the rotating body, and prevents the vibration generated during the operation of the blower fan and the rotating motor. It is possible to prevent the discomfort caused by and shorten the life of the parts.

1 is a perspective view of an air purifier according to the present invention.
2 is a cross-sectional view of an air purifier according to the present invention.
3A to 3D are a perspective view, a plan view, a bottom view and a side view of a rotating body 200 of an air purifier according to the present invention.
4 is a schematic diagram illustrating a general magnetic levitation principle.
5 is a circuit diagram of the solenoid electromagnet portion 390, the rotating permanent magnet 290, the position permanent magnet 295 and the circuit portion 350 in the air purifier according to the present invention shown in FIG.

Hereinafter, an air cleaner according to the present invention will be described with reference to the drawings.

Description of the component

First, the air cleaner according to the present invention will be described with reference to FIGS. 1 and 2.

1 is a perspective view of an air purifier according to the present invention, and FIG. 2 is a cross-sectional view of the air purifier according to the present invention and includes a housing 100, a rotating body 200, and a base 300.

The housing 100 is positioned above the base 300 and is spaced apart from the rotating body 200 to surround it.

As described later, the rotor 200 floats on the base 300 by interacting with the solenoid electromagnet 390 and the permanent magnet 290 for rotation or the permanent magnet 295 for positioning. It is rotatable about the center.

The base 300 is located below the housing 100 and the rotor 200.

The housing 100 will be described in detail.

As described above, the housing 100 is positioned to be spaced apart from the rotating body 200 by a predetermined distance, so that the rotating body 200 can be rotated without being affected by the housing 100.

The housing discharge part 110 is positioned on the upper surface of the housing 100, and the purified air discharged from the rotating body 200 is discharged to the outside through the housing discharge part 110.

To this end, the housing discharge unit 110 is preferably formed at a position corresponding to the rotating body discharge unit 210 as shown.

The lower surface of the housing 100 is connected to penetrate the base 300, and the housing opening 130 is located on the lower inner surface of the housing 100.

Through this, the air introduced into the air purifier through the outside air inlet (not shown) located in the base 300 flows to the inner surface of the housing 100 through the housing opening 130 and then flows into the rotating body 200. (“A” in FIG. 2).

Next, the rotor 200 will be described in detail with reference to FIGS. 3A to 3D.

3A to 3D are a perspective view, a plan view, a bottom view and a side view of a rotating body 200 of an air purifier according to the present invention.

The rotating body 200 may be rotatable about the rotating shaft 240. This rotational movement is made by the interaction of the solenoid electromagnet portion 390 of the base 300 and the permanent magnet 290 for rotation of the rotor 200, which will be described in detail below.

The lower surface of the rotating body 200 is a rotating permanent magnet cover 271 for protecting the rotating permanent magnet 290 is located.

The rotor suction unit 270 is positioned below the rotor 200, so that air is introduced into the rotor 200 through the rotor suction unit 270 when the rotor 200 is rotated. In other words, the rotor suction part 270 is a space located between the rotating body 250 and the rotating permanent magnet cover 271.

A plurality of blades 272 are positioned in the rotating body suction part 270 to introduce air into the rotating body 200 during rotation.

To this end, when viewed in plan, a plurality of blades 272 is preferably formed to be radially bent from the center of the circular lower surface of the rotor suction portion 270 (see Fig. 3c).

In addition, even when viewed from the side, it is preferable that a plurality of blades 272 are formed to be bent upward from the lower surface of the rotor suction portion 270 (see Fig. 3d).

Although the shape of the blade 272 of the most preferred embodiment to effectively flow air has been described through a number of experiments of the present inventors, it is a matter of course that the shape of any type of fan or blade that introduces external air into the inside during rotation.

A positioning permanent magnet 295 is positioned at the upper center of the rotating permanent magnet cover 271. The position permanent magnet 295 is a permanent magnet having a position maintaining function to stably float and rotate the rotating body 200 by interaction with the rotating permanent magnet 290 or the solenoid electromagnet portion 390.

The filter unit 230 is positioned inside the center of the rotating body 200. The filter unit 230 may include any filter for purifying air, but in one embodiment according to the present invention, the filter unit 230 preferably includes a hepa filter.

In the upper portion of the rotor 200, the rotor discharge unit 210 for discharging the purified air passing through the filter unit 230 is located. In other words, the rotating body discharge part 210 is a space between the discharge cover 211 and the cover support 212 located on the upper surface of the rotating body 200.

Next, the base 300 will be described in detail.

As described above, the base 300 is spaced apart from the rotating body 200 and positioned below the housing 100.

The mesh network 330 is positioned inside the base 300, and foreign matters are primarily filtered while the air introduced through the outside air inlet (not shown) passes through the mesh network 330.

The solenoid electromagnet portion 390 is positioned inside the center of the base 300. The solenoid electromagnet part 390 rotates the rotor 200 by interaction with the rotating permanent magnet 290 of the rotor 200.

The solenoid electromagnet portion 390 arranges the N pole electromagnet and the S pole electromagnet at the intersection to generate a magnetic induction phenomenon when the rotor 200 including the permanent magnet for rotation moves on the conductor 310 to repel the rotor 200. Is floated on the conductor 310 and rotated on the conductor 310 by traction with the permanent magnet for positioning.

At this time, the solenoid electromagnet portion 390 is composed of a solenoid is inserted a plurality of iron cores, the coil is wound to generate a magnetic induction.

Explanation of Maglev Principle

In general, a train that is driven in the air using magnetic force (Levitation) is called a "MagLev". The floating method is a repulsion using the repulsive force acting between the magnets of the same pole and a suction using the pulling force between the other poles.

The suction type floats the car body by using the attraction force between the electromagnet fixed on the car body and the magnetic rail, and the repulsion type is composed of a strong magnet mounted on the car body and a coil placed continuously in the track so that the strong magnet moves on the upper surface of the coil. The magnetic induction causes the coil to have the same polarity as the magnet of the vehicle body and is magnetically injured by the large repulsive force generated between the two.

4 is a schematic configuration diagram illustrating a general magnetic levitation principle, and includes a mover 20 including a conductor 10, an N pole permanent magnet 21, and an S pole permanent magnet 22.

Referring to Figure 4 describes the general principle of magnetic levitation as follows.

In a system consisting of the conductor 10 and the permanent magnets 21, 22, the conductor 10 acts as a stator and the permanent magnets 21, 22 as a mover. Magnetic induction occurs between the permanent magnets 21 and 22 moving at high speed and the fixed conductor 10, and thus induced current flows in the conductor 10.

At this time, between the conductor 10 and the permanent magnets 21 and 22, a floating force 31 and a traction force 32 due to the repulsive force are generated between the conductors 10 and the permanent magnets 21 and 22. The floating force 31 is a case in which the conductor 10 is fixed. The force to float the mover 20, the traction force 32 is a force acting against the direction 33 of the mover 20.

When the mover 20 moves at a high speed, as compared with the traction force 32 which hinders the movement of the magnet, the floating force 31 to open the magnet becomes large, and the moment when the floating force 31 larger than the load of the magnet occurs. The mover 20 rises from the conductor 10.

The mover 20 arranges the permanent magnets with the N-pole permanent magnets 21 and the S-pole permanent magnets 22 alternately, and the stator is composed of a conductor 10 such as a copper plate or an aluminum plate. The cross arrangement of the permanent magnets into the N-pole permanent magnets 21 and the S-pole permanent magnets 22 is to make the change of the magnetic field in the form of a cosine-like periodic function when the permanent magnets move.

This periodic function type magnetic field generates a change in the magnetic field in the longitudinal direction 33 that moves with the change of the magnetic field with respect to time when the magnet moves. This change in magnetic field causes the mover 20 moving at high speed to rise from the conductor 10, which is the stator.

Explanation of Rotation Principle of Rotating Body 200

5 is a circuit diagram of the solenoid electromagnet portion 390, the rotating permanent magnet 290, the position permanent magnet 295 and the circuit portion 350 in the air cleaner according to the present invention shown in FIG. 390 includes two pairs of N-pole electromagnets and S-pole electromagnets, and circuit portion 350 includes Hall IC 359, two triac portions 352 and 354, and two variable resistors 356 and 358. And, each of the two triac parts 352, 354 includes four switches.

Referring to Figures 1 to 5 will be described the principle of rotation of the rotor 200 in the air cleaner having a rotor rotating by the solenoid electromagnet according to the present invention.

The solenoid electromagnet portion 390 arranges the N pole electromagnet and the S pole electromagnet at the intersection to generate a magnetic induction phenomenon when the rotating permanent magnet 290 moves on the conductor 310, thereby causing the rotating permanent magnet 290 to be repelled by the repulsive force. It floats on conductor 310 and rotates on conductor 310 by traction.

At this time, the solenoid electromagnet portion 390 is composed of a solenoid is inserted a plurality of iron cores, the coil is wound to generate a magnetic induction.

The position permanent magnet 295 maximizes the strength of the magnetic field of the upper portion of the solenoid electromagnet portion 390 and the lower portion of the position permanent magnet 295, thereby lowering the position permanent magnet 295 and the rotating permanent magnet 290. It acts as a force to fix the position of the rotating body 200 including the permanent magnet 290 for rotation by the suction force generated between the bottom of the).

The hall IC 359 is connected to the rotating shaft 240 to determine whether the rotating body 200 is rotated.

The two triac parts 352 and 354 are respectively connected to two switches of the N pole electromagnet and the S pole electromagnet of the solenoid electromagnet unit 390 to change the N / S pole of the permanent magnet with +/− switching.

The two variable resistors 356 and 358 are connected to the two triacs, respectively, and the output is adjusted to adjust the revolutions per minute (rpm) of the rotating body 200.

Referring to FIGS. 1 to 5, the operation of the air cleaner including the rotating body rotated by the solenoid electromagnet according to the present invention will be described.

When the rotor 200 is rotated by arranging the N pole electromagnet and the S pole electromagnet of the solenoid electromagnet portion 390 to have a predetermined angle from the center of the housing 100, a change in a magnetic field such as a cosine function occurs.

In the present invention, the permanent magnet 295 for position is coupled to the upper portion separately from the solenoid electromagnet portion 390 facing the conductor 310, and the rotating permanent magnet 290 is inserted therebetween to replace the conventional rotating motor. do.

The upper part of the solenoid electromagnet part 390 and the lower part of the rotating permanent magnet 290 become the same polarity, so that a repulsive force is generated so that the rotating body 200 including the rotating permanent magnet 290 is floated, and the permanent magnet for position The lower side of the 295 becomes the opposite polarity to generate a suction force with the lower side of the rotating permanent magnet 290 acts as a force to fix the position of the rotating body 200 including the rotating permanent magnet 290.

As a result, the rotating body 200 including the permanent magnet 290 for rotation is floated at regular intervals with two forces, a repulsive force and a suction force, between the solenoid electromagnet 390 and the positional permanent magnet 295, and the two tri Each of the parts 352 and 354 can be rotated by changing the ON / OFF of the electromagnets in turn.

Explanation of Air Purification Method

An air purification method will be described with reference to FIGS. 1 to 5.

First, the outside air flows into the air purifier through an outside air inlet (not shown) of the base 300.

The air purifier introduced to the base 300 passes through the mesh network 330 to filter out foreign substances.

Air passing through the mesh network 330 flows into the rotating body 200 by suction and rotational suction of the rotating body 200 ("A" in FIG. 2).

At this time, the support and rotation of the rotating body 200 is caused by the repulsion and suction force generated between the solenoid electromagnet portion 390 and the position permanent magnet 295 acts on the rotating permanent magnet 290 provided therein to rise. Then, the switching operation of each of the triac parts 352 and 354 is rotated by the ON / OFF change in the electromagnet.

The air introduced into the rotating body 200 is purified while passing through the filter unit 230, and the purified air is discharged to the outside through the rotating body discharge unit 210 and the housing discharge unit 110 (" B ").

As described above, the air purifier having the rotating body rotated by the solenoid electromagnet of the present invention rotates the rotating body by the interaction of the solenoid electromagnet and the rotating permanent magnet so that the outside air is discharged through the rotating body. By reducing the noise generated by the blower fan and the rotating motor driving it can increase the air volume of the air purifier according to the air pollution in the room even when operating in a space requiring a quiet environment.

In addition, the conventional rotary motor used to drive the rotating body of the air cleaner can prevent the increase in the volume of the rotating motor occupied in proportion to the floating force of the rotating body, and prevents the vibration generated during operation of the blower fan and the rotating motor. It is possible to prevent the discomfort caused by and shorten the life of the parts.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the invention described in the claims below It will be appreciated that it can be changed.

100: Housing
110: housing discharge part
130: housing opening
200: rotating body
210: rotating body discharge portion
211: discharge cover
212: cover support
230: filter unit
240: rotation axis
250: rotating body
270: rotating body suction
271: permanent magnet cover for rotation
272: blade
290: permanent magnet for rotation
295: permanent magnet for position
300: base
330 mesh
350: circuit part
390: solenoid electromagnet

Claims (8)

A base having a solenoid electromagnet; And
An air purifier floating on the base and including a rotatable body;
The rotating body includes a rotating permanent magnet positioned corresponding to the solenoid electromagnet, and the rotor rotates on the base by the interaction of the solenoid electromagnet with the rotating permanent magnet, so that outside air is rotated. Characterized in that is discharged through the,
air cleaner.
The method of claim 1,
The method of claim 1,
A rotating body suction part is located below the rotating body, a rotating body discharge part is located above the rotating body, and a filter part is located inside the rotating body,
Air flowing into the rotating body penetrates along the rotating body suction part, the filter part and the rotating body discharge part,
air cleaner.
The method of claim 2,
The rotating body suction part is formed by a plurality of blades positioned below the rotating body, and the plurality of blades are radially bent from the center of the lower surface of the rotating body suction part to introduce air into the rotating body during rotation. Characterized in that formed,
air cleaner.
The method of claim 2,
The filter unit includes a hepa filter,
Located in the mesh network inside the base, and
After the outside air flows into the base and passes through the mesh network, the outside air is passed through the rotating body suction unit, the filter unit and the rotating body discharge unit sequentially and discharged to the outside of the air cleaner.
air cleaner.
The method according to any one of claims 1 to 4,
The rotating permanent magnet and the position permanent magnet is located on the lower surface of the rotating body, and
Wherein the permanent magnet for position has a function of maintaining the position of the rotating body,
air cleaner.
5. The method according to any one of claims 2 to 4,
The air purifier further comprises a housing positioned above the base, and
The housing is spaced apart from the rotating body to surround the rotating body,
≪ / RTI >
air cleaner.
The method according to claim 6,
A housing opening is located below the housing, and the position of the housing opening corresponds to a position of the rotating body suction part, so that air introduced into the housing flows into the rotating body through the housing opening.
air cleaner.
The method of claim 1,
The base
A triac part connected to the solenoid electromagnet part to change an N / S pole by a switching operation; And
A variable resistor connected to the triac part to adjust the revolutions per minute of the rotating body;
≪ / RTI >
air cleaner.

KR1020110086031A 2011-08-26 2011-08-26 An air purifier equipped with a spinning rotor by an electromagnetic solenoid KR20130022959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110086031A KR20130022959A (en) 2011-08-26 2011-08-26 An air purifier equipped with a spinning rotor by an electromagnetic solenoid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110086031A KR20130022959A (en) 2011-08-26 2011-08-26 An air purifier equipped with a spinning rotor by an electromagnetic solenoid

Publications (1)

Publication Number Publication Date
KR20130022959A true KR20130022959A (en) 2013-03-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018227474A1 (en) * 2017-06-15 2018-12-20 彭云龙 Oil-mist recovery device for ventilation port of lubricating system and magnetic mesh disk thereof
CN109312940A (en) * 2016-06-08 2019-02-05 卓胜镐 Air purifier
CN110559755A (en) * 2019-09-29 2019-12-13 温州浩僧服饰有限公司 Annular movable air filter element easy to clean

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109312940A (en) * 2016-06-08 2019-02-05 卓胜镐 Air purifier
WO2018227474A1 (en) * 2017-06-15 2018-12-20 彭云龙 Oil-mist recovery device for ventilation port of lubricating system and magnetic mesh disk thereof
CN110559755A (en) * 2019-09-29 2019-12-13 温州浩僧服饰有限公司 Annular movable air filter element easy to clean

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