Seoul, South Korea
Seoul, South Korea

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Provided are a heat exchanger, a food handler including the heat exchanger, and a manufacturing method of the heat exchanger. The heat exchanger comprises a main body wherein the plurality of flow channels passes through the inside of the heat exchanger in a first direction and a pair of cover members which is fastened to both ends of the main body in the first direction. The plurality of flow channels is composed of a first flow channel which functions as the path for a first flowing fluid which goes in and out through the cover members and a second flow channel which is connected to the side of the main body. Thermal exchange is performed between the first flowing fluid and the second flowing fluid in the direction wherein the first and second flowing fluids cross each other inside of the main body.


Patent
Woongjin Coway Co. | Date: 2015-08-17

A water purifier is provided. The water purifier includes a purified water tank for storing purified water, a hot water tank including a heater for heating the purified water supplied from the purified water tank, a purified water supply pipe connecting the purified water tank and the hot water tank to supply the purified water of the purified water tank to the hot water tank, a purified water supply valve opening or closing the purified water supply pipe, a manipulation unit through which a user inputs an extraction amount of hot water, a memory unit for readably storing an opening time of the purified water supply pipe depending on an amount of purified water to be supplied to the hot water tank, and a control unit setting the extraction amount of hot water to the amount of purified water to be supplied to the hot water tank when the extraction amount of hot water is inputted through the manipulation unit, reading the opening time of the purified water supply pipe corresponding to the amount of purified water to be supplied to the hot water tank from the memory unit, and opening the purified water supply pipe during a specified opening time.


There is provided a warm water supply device for controlling the number of voltage pulses applied to heaters, including: a first heater configured to have a first pre-set capacity, provided at a water inlet, and heating water introduced through the water inlet; a second heater configured to have a second pre-set capacity greater than that of the first pre-set capacity, provided at a water outlet, and heating water introduced through the water outlet; and a controller calculating a first heater driving period and calculating a second heater driving period according to a water temperature introduced through the water inlet and a set heating water temperature discharged through the water outlet by using a zero crossing control scheme, and driving the first and second heaters by controlling the number of voltage pulses applied to the first and second heater according to the heater driving periods, respectively.


A washing device for a water treatment apparatus is provided. The washing device includes circulation members connected to passages of the water treatment apparatus to circulate wash water through the passages of the water treatment apparatus, a circulation module connected to the circulation members for circulating the wash water through the passages of the water treatment apparatus, with the circulation members thereby washing the passages of the water treatment apparatus, a drainpipe connected to the circulation members, a passage switching unit connected to a portion where the circulation members are coupled to the drainpipe to switch passage of the wash water, and a circulation pump connected to the circulation members to selectively circulate the wash water in the connection pipes through the drainpipe or the passages of the water treatment apparatus.


A washing method of a water treatment apparatus is provided. The washing method includes a wash water inflow operation in which wash water flows into circulation members, and a circulation washing operation in which a circulation modulation circulates the wash water through passages of the water treatment apparatus.


Patent
Woongjin Coway Co. | Date: 2013-02-06

Disclosed is a water storage and discharge apparatus capable of discharging the water stored irrespective of the height of a water discharge member such as a cock, a faucet or the like. The water storage and discharge apparatus according to one embodiment of the present invention comprises: a storage tank (200) for storing the inflow of water, connected to an inlet pipe (210) for the inflow of water and connected to an outlet pipe (220) for the outflow of water stored; a discharge member (300) for discharging the water to the outside stored in the storage tank (200) to the outside, connected to the outlet pipe (220); and a pressure maintenance means (400) for maintaining the pressure of the storage tank (200) to be at atmospheric pressure or higher, thereby enabling the discharge of water through the discharge member (300) irrespective of the height of the discharge member (300), comprising a pump (410) connected to the storage tank (200) and a pressure sensor (420) for sensing the pressure inside the storage tank (200). By this constitution, the present invention can discharge the water stored irrespective of the height of a discharge member such as a cock, a faucet or the like, can freely adjust the height of a discharge member such as a cock, a faucet of the like, can place a discharge member such as a cock, a faucet or the like at a height at which it is convenient for a user to use the discharge member, can discharge the water stored in a storage tank, the water heated in a hot water tank, the water cooled in a cold water tank, or the like with one pump, and can lower the costs of products.


Patent
Woongjin Coway Co. | Date: 2015-09-04

Disclosed is an air purifier able to maintain the normal state of drive of a disk-shaped humidification filter by controlling the state of rotation of the humidification filter. The air purifier can maintain the normal state of drive of the humidification filter by using a stepping motor and the control unit in order to vary the state of rotation of the humidification filter and thereby remove extraneous material when the humidification filter is rotating abnormally due to extraneous material.


Patent
Woongjin Coway Co. | Date: 2012-10-03

A water storage tank (100) in which an inlet (221) allowing water to flow therethrough and a level of water stored in the water storage tank are maintained to have a certain interval therebetween to thus prevent stored water from flowing backwards through the inlet, and a bidet having the same are provided. The water storage tank includes: a tank main body (200) having an inlet (221) allowing water to be introduced therethrough and an outlet (222) allowing water to flow out therethrough; and a back flow preventing unit (300) provided in the tank main body and configured to allow the inlet (221) and a water level in the tank main body to have a certain interval (G1) therebetween so that water stored in the tank main body (200) is prevented from flowing backwards through the inlet (221), wherein the inlet (221) is provided in an upper portion of the tank main body (200) to allow water to be introduced into an upper portion of the tank main body, and the outlet (222) is provided on a level below that of the inlet (221) in the tank main body.


Patent
WOONGJIN COWAY Co. | Date: 2015-01-30

An ice maker and a water purifier capable of making ice using two water trays. The water purifier having an ice maker includes a water tray member comprising an ice-making water tray holding ice-making raw water to make ice using an ice-making unit, and an auxiliary water tray holding ice-making raw water remaining in the ice-making water tray in the course of cooling the ice-making raw water by means of the ice-making unit and removing the ice-making raw water from the ice-making water tray; an ice reservoir storing ice made in the ice-making unit; a cold water storage tank cooling water held therein using the ice made in the ice-making unit; and a guide member guiding the ice made in the ice-making unit so that the ice is selectively fed to either the ice reservoir or the cold water storage tank.


Patent
Woongjin Coway Co. | Date: 2015-09-04

Disclosed is an air purifier able to maintain the normal state of drive of a disk-shaped humidification filter by controlling the state of rotation of the humidification filter. The air purifier can maintain the normal state of drive of the humidification filter by using a stepping motor and the control unit in order to vary the state of rotation of the humidification filter and thereby remove extraneous material when the humidification filter is rotating abnormally due to extraneous material.

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