Chung, South Korea
Chung, South Korea

Time filter

Source Type

Lim Y.G.,Microfilter Co. | Lim Y.G.,Dongguk University | Kim Y.J.,Microfilter Co. | Park S.J.,Dongguk University | Hong S.-K.,Dongguk University
Korean Chemical Engineering Research | Year: 2014

As the need for miniaturization in water purification filter increases, the development of filter media for single filtration with multiple function was strongly required. In this study, the molded activated carbon composed of single unit was manufactured by extrusion-sintering process, and then the flow rate, density and porosity were investigated using the molded activated carbon manufactured at various extrusion temperature. We confirmed that it was possible to manufacture the single unit-molded activated carbon when the extrusion temperature was 140∼230 oC more than 133 oC being of polymer binder melting point, and the optimal extrusion temperature for the molded activated carbon with maximum flow rate was 170 oC since the molded activated carbon had low density and high through porosity. Also we confirmed that the flow rate through the molded activated carbon was strongly dependent upon through pore porosity compared to total porosity for the molded activated carbon.


Kim D.H.,Chonnam National University | Kim D.W.,Chonnam National University | Kim B.-H.,Chonnam National University | Yang K.S.,Chonnam National University | And 2 more authors.
Journal of the Korean Chemical Society | Year: 2013

The adsorption characteristics of Cd(II) and Pb(II) in aqueous solution using granular activated carbon (GAC), activated carbon fiber (ACF), modified ACF (NaACF), and a mixture of GAC and NaACF (GAC/NaACF) have been studied. The surface properties, such as morphology, surface functional groups, and composition of various adsorbents were determined using X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) measurements. The specific surface area, total pore volume, and pore size distribution were investigated using nitrogen adsorption, Brunauer-Emmett-Teller (BET), and Barrett-Joyner-Halenda (BJH) methods. In this study, NaACF showed a high adsorption capacity and rate for heavy metal ions due to the improvement of its ion-exchange capabilities by additional oxygen functional groups. Moreover, the GAC and NaACF mixture was used as an adsorbent to determine the adsorbent-adsorbate interaction in the presence of two competitive adsorbents.


Patent
Microfilter Co. and Dong | Date: 2016-09-21

Disclosed herein is a filter assembly including a hollow external housing which includes an inlet (110) and an outlet (120) and has an inner wall of an open bottom on which a plurality of uneven portions (130) circularly arranged at certain intervals are formed, an inner cap (200) which is formed in a cylindrical shape with an open bottom corresponding to an internal hollow shape of the external housing and moves up and down along the inner wall of the external housing (100), a filter (300) which includes a head portion (310) inserted into the bottom of the inner cap (200) and forms a fitting groove (320) on a side of the head portion (310), an elastic member (400) which is disposed between an upper portion of the inner wall of the external housing (100) and an upper portion of an outer surface of the inner cap (200) and has a repulsive force which acts when the head portion (310) of the filter (300) receives a force from a top in the inner cap (200), and a filter fastening unit (500) which includes a plurality of pressurized sections (510) disposed on a lower circumference of the inner cap (200) corresponding to the plurality of the uneven portions (130). Here, when the filter (300) is inserted into the inner cap (200), the plurality of pressurized sections (510) are pressurized by the plurality of uneven portions (130) formed on the inner wall of the plurality of pressurized sections (510) and steps formed at ends while protruding inside the plurality of pressurized sections (510) are fixed to the fitting groove (320) of the filter (300). Accordingly, in the filter assembly an uneven portion is formed on an inner wall of a hollow external housing and a filter fastening unit which includes a pressurized section pressurized by the uneven portion is formed around an inner cap which moves up and down along an inner surface of the external housing to firmly fasten a filter.


A locking-unlocking structure is provided in which, when a filter cartridge to be replaced or various articles (lifting body), which needs to be lifted (including falling), is lifted through repeatedly pushing actions in a water purification system, in order to repeatedly perform the stopping (locking) of the lifting body in a lifting state and the falling (unlocking) of the lifting body in the stopping state, only forward lifting is guided. In addition, the completion state of the falling can be acoustically recognized in falling. In addition, the above structure is possible through modification without using of additional components. When a lifting plate having a stop protrusion to circulate a lifting line and a falling line is lifted, an elastic member is on the falling line, and a guide protrusion is at a front end of the elastic member, so that the stop protrusion is lifted only along the lifting line.


A locking-unlocking structure repeatedly performs stopping of lifting of a lifting body and falling of the lifting body by releasing the stopping of the lifting body as pushing actions are only repeated when a filter cartridge to be replaced or various articles (lifting body), which requires lifting (including falling), are lifted through repeatedly pushing actions in a water purification system. An actuation unit constituting a locking-unlocking unit is mounted in a lifting body, and an actuation guide unit coupled to the actuation unit is mounted in a fixing body when the lifting body is lifted and falls in the fixing body. As the actuation unit circulates along a lifting line and a falling line of the actuation guide unit, the stopping of lifting of the lifting body is performed through a pushing action and the falling of the lifting body is performed by releasing the stopping through re-pushing.


Patent
Joung and Microfilter Co. | Date: 2016-09-21

Disclosed are a filter head installed on a water purification line in which water is purified by using a filter and a filter cartridge assembly detachably attached to the filter head. In the filter cartridge assembly, the filter cartridge is automatically detachable from the filter head by repeatedly pushing the filter cartridge in a vertical direction without any manipulation. In addition, when the filter cartridge is detached by repeatedly pushing the filter cartridge, a bypass passage and a water purification passage are selectively formable. By repeatedly pushing the filter cartridge, the filter cartridge is automatically coupled or decoupled. The filter cartridge can be stopped when moving up and move down when the stop state is released.


Patent
Microfilter Co. | Date: 2016-03-16

Disclosed herein is a filter assembly, and more particularly, to a filter assembly in which an uneven portion is formed on an inner wall of a hollow external housing and a filter fastening unit which includes a pressurized section pressurized by the uneven portion is formed around an inner cap which moves up and down along an inner surface of the external housing to firmly fasten a filter.


Patent
MICROFILTER Co. | Date: 2016-03-16

A filter cartridge assembly is provided. The filter cartridge assembly includes a filter head having an inlet and an outlet, an inner moving up or down in the filter head by an elastic unit, and a locking/unlocking part to control the inner to be stopped in a state that the inner moves up and to move down in state that the inner is stopped such that a filter cartridge is detachably installed in the filter head through the up-down movement of the inner, wherein, in order to allow the inner, which moves up or down in the filter head, to linearly move up only to separate the filter cartridge and to prevent the filter cartridge from being arbitrarily separated when the inner moves down. The inner includes an inner main body, and a holder including a plurality of wing pieces, in which the holder formed on a lower end of the inner main body are provided with the wing pieces which are spaced apart from each other to operate inward and outward, respectively, when the inner moves up or down. Each of the wing pieces includes a protrusion for inducing the inner to be retracted inward while tightly making contact with an inner wall of the filter head when the inner moves up, and a holder protrusion formed at an opposite side of the protrusion to hold the filter cartridge. The protrusion of the wing piece releases an operation of the holder protrusion holding the filter cartridge in a state that the inner moves down, and the filter head is provided with an inner groove rim on a portion at which the protrusion is placed in the state that the inner moves down such that the protrusion is inserted into the inner groove rim to be latched to the inner groove rim, thereby preventing the inner from being arbitrarily separated from the filter head.


A locking-unlocking structure for guiding forward lifting of a lifting body lifted by repeating a pushing action is provided. The locking-unlocking structure includes an actuation guide unit provided at a center thereof therein with a stop groove to guide stop of a lifting body in a lifting state, having a lifting line and a falling line branching downward from the stop groove, and fixedly coupled to a fixing body, and an actuation unit comprising a lifting plate having a stop protrusion, which is mounted in the stop groove of the actuation guide unit or circulates along the lifting line and the falling line, and coupled to the lifting body movably left and right. The guide protrusion protrudes from the falling line of the actuation guide unit while being inclined downward along the falling line to block an entrance so that the stop protrusion of the lifting plate is prevented from entering the falling line when the lifting plate of the actuation unit is lifted. The guide protrusion is provided in an elastic member to be elastically actuated when the stop protrusion of the lifting plate falls along the falling line.


A locking-unlocking structure for stopping a lifting body, which is vertically lifted and falls through repetition of a pushing action, in a lifting state and for releasing a stopping state of the lifting body is provided. The locking-unlocking structure includes a lifting body, which is exactly lifted immediately upward, or falls without being fluctuated left and right and, to control lifting and falling operations of the lifting body, an actuation unit is mounted in the lifting body movably left and right, and an actuation guide unit, which guides an operation of the actuation unit, is fixedly mounted in a fixing body, and the lifting body is provided therein with a rotation groove allowing the actuation unit to be movable left and right when the lifting body is lifted or falls, and a rotation shaft rotatably coupled to the rotation groove is provided at one side of a lifting plate. The lifting plate is provided on a lower end of an opposite side thereof with a stop protrusion circulating a lifting line and a falling line branching left and right. The actuation guide unit, which is configured to guide an operation of the actuation unit, includes the lifting line having a rising curve line and the falling line having a falling curve line, the lifting line and the falling line branching left and right at a lower end of the actuation guide unit, to guide repeatedly circulating operations of the actuation unit. The actuation guide unit is provided at a central upper portion thereof with a stop groove interposed between the lifting line and the falling line to securely mount the stop protrusion in the stop groove.

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