KR20120047470A - Instant hot-water generator using a screw type supporting member - Google Patents

Instant hot-water generator using a screw type supporting member Download PDF

Info

Publication number
KR20120047470A
KR20120047470A KR1020100109040A KR20100109040A KR20120047470A KR 20120047470 A KR20120047470 A KR 20120047470A KR 1020100109040 A KR1020100109040 A KR 1020100109040A KR 20100109040 A KR20100109040 A KR 20100109040A KR 20120047470 A KR20120047470 A KR 20120047470A
Authority
KR
South Korea
Prior art keywords
support
heating element
screw
hot water
water generator
Prior art date
Application number
KR1020100109040A
Other languages
Korean (ko)
Inventor
이진교
Original Assignee
이진교
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 이진교 filed Critical 이진교
Priority to KR1020100109040A priority Critical patent/KR20120047470A/en
Publication of KR20120047470A publication Critical patent/KR20120047470A/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
    • F24H1/102—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance
    • F24H1/103—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance with bare resistances in direct contact with the fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0015—Guiding means in water channels
    • F24H9/0021—Sleeves surrounding heating elements or heating pipes, e.g. pipes filled with heat transfer fluid, for guiding heated liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1818—Arrangement or mounting of electric heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H2250/00—Electrical heat generating means
    • F24H2250/02—Resistances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/02—Casings; Cover lids; Ornamental panels

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

PURPOSE: An instantaneous hot water generator using a screw-type supporter is provided to instantaneously heat water in a short time because a heating element is wound around a screw-type supporter to maximize contact area between the water and the heating element. CONSTITUTION: An instantaneous hot water generator using a screw-type supporter(100) comprises a screw-type supporter(10), a heating element(24), a body(50), and a cover(18). A gully of the supporter is dug in a spiral shape. The heating element is mounted on the gully of the supporter. The body accommodates the supporter on which the heating element is mounted. The cover is attached to one side of the supporter to seal an isolation unit to the body. The heating element is point-contact with the supporter at a position apart from the bottom of the gully at a predetermined gap.

Description

Instant hot-water generator using a screw type supporting member}

The present invention relates to an instantaneous hot water generator, and more particularly, to an instantaneous hot water generator in which a support body on which a heating element is mounted has a screw shape.

The instantaneous hot water generator is used to obtain hot water heated to a desired temperature in a short time by an electric method in a relatively low flow rate product such as an electronic bidet, a cold water heater and a cold water purifier. Currently, the instantaneous hot water generator installs a heating element on the outside of a water pipe made of an electrical insulation material such as ceramic to heat a fluid such as water flowing into the water pipe. In addition, a heating element is embedded in the inside and the outside of the heating element is wrapped around the heating element is provided with a metal protective tube of excellent thermal conductivity filled with a filler for electrical insulation to heat the fluid present or passing outside the protective tube.

However, in the case of using an insulating material such as ceramic, it can be easily broken by external shock or vibration, a complicated manufacturing process, and a high manufacturing cost. In addition, ceramic-based materials have lower thermal conductivity than metals, which lowers heat transfer efficiency. Accordingly, in order to increase the temperature of the fluid to a desired temperature, it takes relatively longer time than using metal materials.

In addition, the instantaneous hot water generator using a metal tube having a heating element installed therein, since the fluid flows quickly through the outside of the metal tube at a predetermined flow rate, thereby ensuring sufficient time for the fluid to be heated by the heat emitted from the metal tube. Can not. As a result, the instantaneous hot water generator using the metal tube has a small contact area between the metal tube and the fluid, and thus the fluid cannot be properly raised to a desired temperature.

On the other hand, in order to heat the fluid to a target temperature at a desired time, the length of the metal tube is increased, or a plurality of metal tubes are used to improve the metal tube such as to complicate the path through which the fluid proceeds. However, the improvement of the metal tube resulted in the enlargement of the instantaneous hot water generator, which increased the noise and power consumption. In addition, when the flow path is complicated, the flow resistance of the fluid becomes large and the flow rate decreases. Therefore, in order to solve this problem, it is necessary to increase the pressurization performance of a pump, etc., it takes a long time to increase the temperature to a desired temperature, there is a problem that it is not suitable for the instantaneous hot water generator that is always used.

Accordingly, an object of the present invention is to provide an instantaneous hot water generator using a screw-type support that can be easily manufactured with a simple structure and can heat the fluid in a short time by increasing the contact area with the fluid.

Instantaneous hot water generator using a screw-shaped support of the present invention for solving the above problems is a screw-shaped support with a spiral grooved, a heating element mounted on the bone of the support, and the support on which the heating element is mounted It is attached to one side of the support body and the support body, the cover includes a cover for sealing the support, the heating element is in point contact with the support at a position separated by a predetermined distance from the bottom of the bone.

In addition, the upper surface or the body of the cover may be formed with an inlet for water is introduced, the lower end of the body may be formed with an outlet for discharging water. Here, the heating element is made of a spring-shaped coil, the surface of the heating element may be coated with an insulating material to prevent leakage and corrosion by direct contact with the fluid.

In the present invention, a predetermined space may be provided between the body and the support inserted into the body. In addition, the heating element has a connection terminal that can be supplied with external power on both sides, the connection terminals are all installed to be drawn out through the cover, or one side of the connection terminal through the cover to the outside The other side may be installed through the vicinity of the outlet of the body to be drawn out.

In a preferred embodiment of the present invention, the heating element may be connected by a connector insulated from the outside at the end of the end of the valley of the support. In addition, the cover may have a conical shape that is wider toward the support.

According to the instantaneous hot water generator using the screw-type support of the present invention, by mounting the heating element made of a spring-type coil insulated on the screw-type support, the contact area between the heating element and water is increased as much as possible in a short time It is possible to provide an instantaneous hot water generator capable of heating water. In addition, according to the instantaneous hot water generator of the present invention, since the structure is simple and the production is easy, the production cost can be reduced.

1 is an exploded perspective view of an instantaneous hot water generator using a screw-shaped support according to the present invention.
Figure 2 is an overall perspective view of the instantaneous hot water generator using a screw-shaped support according to the present invention.
3 is a partial cross-sectional view showing a shape in which the heating element is wound around the screw-shaped support in the instantaneous hot water generator using the screw-shaped support according to the present invention.
Figure 4 is a cross-sectional view showing another embodiment of the instantaneous hot water generator using a screw-shaped support according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below may be modified in various forms, and the scope of the present invention is not limited to the embodiments described below. Embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

Instantaneous hot water generator is a device that generates hot water instantaneously by heating water using electricity. The embodiment of the present invention uses a method of maximally increasing the contact area between the heating element for heating the water and the water in order to obtain hot water heated to a predetermined temperature instantaneously. On the other hand, if the flow path of the water flowing in the instantaneous hot water generator is too complicated, increase the time that the water passes through the flow path and the flow resistance of the water is increased to decrease the flow rate.

Accordingly, the present invention proposes an instantaneous hot water generator using a screw-type heating element that can increase the contact area between water and the heating element while having a simple structure. Hereinafter, the structural aspects and the contact area of the instantaneous hot water generator using the screw-shaped support of the present invention (hereinafter referred to as 'screw type') will be described in detail, and the effects generated thereby will be described in detail.

1 is an exploded perspective view for explaining the components of the instantaneous hot water generator 100 according to the present invention. Referring to FIG. 1, the instantaneous hot water generator 100 of the present invention has a screw-shaped support 10 formed with spirally grooved bones at regular intervals, and a spring-shaped coil mounted on the bones of the support 10. A heat generating body 24, a cylindrical body 50 accommodating the support body 10 on which the heat generating body 24 is mounted, and a cover 18 separating the support body 10 from the outside of the body 50. do. At this time, the support 10 may be formed in the bone in the cylindrical or square, the shape may vary depending on the use of the product.

The support 10 has a screw shape in which spiral grooves are formed in a spiral shape in the form of a single-threaded screw or a two-threaded screw at regular intervals throughout the longitudinal direction, and is made of a synthetic resin or ceramic material having heat resistance. A spring-type heating element 24 is mounted along the valley formed in the support 10. The heating element 24 is first rolled down in one direction along the spiral goal and then wound up at the end of the spiral goal, and then wound up in the opposite direction. In this case, a connector (not shown) that is insulated from the outside may be attached to surround a portion of the heating element 24 that extends over the end of the support 10.

In addition, although not shown, two heating elements 24 may be wound and mounted in one direction as necessary. In this case, at least two heating elements 24 are connected to each other by a connector insulated from the outside at the end where the valley of the support 10 ends. Accordingly, the heating element 24 may be prevented from directly contacting the end portion of the support 10, thereby preventing the support 10 from being damaged by the heat of the heating element 24.

The heating element 24 may be formed of any one of nickel (Ni) -chromium (Cr) -based, iron (Fe) -chromium (Cr) -based, or tungsten (W) -containing alloys, depending on product requirements. Other materials may also be used. The surface of the heating element 24 is coated with a coating material of an insulating material in order to prevent leakage and corrosion caused by direct contact with the fluid. In this case, the coating agent is a material having an electrical insulation performance without reducing the thermal conductivity, a composition containing alumina (Al 2 O 3 ) containing silicon oxide (SiO 2 ) as a main component can be used. In addition, any one selected from parylene made of ceramic series or polymer polymer series may be used. In addition, the coating agent used in the present invention is not limited thereto, and various insulating materials may be used as necessary. The thickness of the coating agent coated on the surface of the heating element 24 is preferably a low leakage rate of about 10 ~ 80㎛ not affecting the thermal conductivity.

The body 50 accommodates the support 10 on which the heating element 24 is mounted. The body 50 is made of a cylindrical shape, for example, and the support 10 in the form of a screw is inserted. The support 10 is preferably configured to be in close contact with the body 50, but when discontinuous due to bubbles generated by water flowing along the bone of the support 10, the heating element 24 is thermally damaged or even the heating element. The support 10 may be damaged by the thermal damage of 24. Accordingly, a slight space or gap may be provided between the joined support 10 and the body 50.

On the other hand, a cover 18 is attached to one side of the support 10 to isolate the support 10 from the outside of the body 50. In addition, one side of the body 50 is coupled to the cover 18 of the support 10 with a screw or the like is formed with a coupling portion 26 for sealing the body 50 in which the support 10 is received. The cover 18 of the support 10 and the coupling portion 26 of the body 50 are engaged with each other by a screw hole 16 protruding along the edge of the cover 18 installed. At this time, the cover 18 and the engaging portion 26 is completely sealed by the packing 20 provided along the circumference of the bottom of the cover 18.

On the upper surface of the cover 18, the inlet 12 for supplying water to the body 50 is located in the center. The inlet 12 penetrates through the central portion of the cover 18 and is connected to two outlets 22 provided on both sides of the upper portion of the support 10. Accordingly, the water flowing into the inlet 12 is supplied to the body 50 through the outlet 22 formed in the upper portion of the support 10, and then opposite to the engaging portion 26 of the body 50. It is discharged through the funnel-shaped outlet 28 installed. Here, the inlet 12 through which water is introduced may be located in the body 50 according to the specification of the product.

In addition, the bottom surface of the cover 18 is provided with a connection terminal 14 connected to both ends of the heating element 24 mounted on the support 10 to apply a current to the heating element 24. At this time, one end of the connection terminal 14 is installed to be drawn out through the cover 18 so that external power can be supplied. As described above, unlike the illustrated case, when the heating element 24 is mounted while being wound in one direction, the connection terminal 14 may be disposed near the outlet 18 of the cover 18 and the body 50. .

2 is a perspective view showing a state in which the screw type instantaneous hot water generator 100 is coupled according to the present invention, and shows a state in which the support 10 and the body 50 shown in FIG. 1 are coupled to each other. As shown in FIG. 2, the support 10 is inserted into the body 50 and is coupled by the cover 18 of the support 10 and the engaging portion 26 of the body 50. At this time, the cover 18 and the engaging portion 26 are in contact with each other and screwed into the screw hole 16, it is sealed by a packing 20 provided therebetween.

Screw-type instantaneous hot water generator of the present invention formed in the above structure, once the external power is supplied to the connecting terminal 14, which is drawn out through the cover 18, the outside is installed, the heating element connected to the connecting terminal 14 A current is applied to the 24. Subsequently, the water introduced through the inlet 12 formed on the upper surface of the cover 18 flows along the support 10 in which the bone is screwed, and is wound along the bone of the support 10. Heated by 24). The heated hot water is discharged through the funnel-shaped outlet 28 installed at the lower end of the body 50.

Thus, according to the screw type instantaneous hot water generator 100 of the present invention, since the heating element 24 is wound around the valley of the support 10 which is helically held at regular intervals, the introduced water and the heating element The contact area can be increased as much as possible. In addition, since the support 10 in the form of a screw in which the coil-type heating element 24 is wound along the valley is inserted into the cylindrical body 50 of the straight shape, the body 50 has a straight flow path but has a screw shape. The heat of the support 10 and the heat generating element 24 can relatively increase the heat transfer efficiency and heat transfer rate generated inside the flow path. Therefore, the water introduced in a relatively short time can be heated to a desired temperature instantaneously, it is possible to easily supply hot water at a suitable temperature from time to time.

3 is a partial cross-sectional view of the screw-type instantaneous hot water generator 100 according to the present invention, in which the heating element 24 is wound around the screw-shaped support 10. Referring to FIG. 3, the support 10 has a screw shape consisting of the valleys 30 and the hills 32 which are helically dug. The heating element 24 is mounted while being wound along a spiral valley 30 formed between the hill 32 and the hill 32 of the support. At this time, the heating element 24 makes point contact with the intermediate point of the valley 30 and the hill 32 of the support 10 at a position spaced apart from the bottom of the valley 30 by a predetermined interval. That is, the space (S) is placed between the heating element 24 and the bottom of the valley 30 so that water flows. At this time, the space (S) may be in various forms, such as U-shaped, wedge-shaped, rectangular, as necessary.

In addition, although not shown, protrusions protruding toward the heating element 24 may be formed at the intermediate points of the valleys 30 and the hills 32 of the support 10. In other words, the protrusions are such that the heating element 24 is caught by the intermediate point of the support 10 so that the space S is formed, and preferably has a curvature toward the space S, or It may be formed by the side or the like. Thereby, the point contact of the heat generating body 24 and the support body 10 can be made more reliably.

Thus, if the space (S) is placed between the heating element 24 and the bottom of the valley 30, the support (by the heat of the heating element 24 generated when the heating element 24 is mounted in contact with the bottom of the valley 30) 10) can be prevented from being damaged. In addition, since the heating element 24 makes point contact with the support 10, the transfer of heat from the heating element 24 to the support 10 can be minimized. In addition, heat transfer can be promoted by making the contact area with the fluid as large as possible.

Figure 4 is a cross-sectional view showing another embodiment of the instantaneous hot water generator using a screw-shaped support according to the present invention. Here, the cover 18a has a conical shape that is widened downward, and is the same as FIG. 1 except that the outlet 22a is not formed on the upper portion of the support 10. Accordingly, the description of the same reference numerals will refer to FIG. 1, and detailed description thereof will be omitted.

In FIG. 4, the shape of the cover 18a attached to one side of the support 10 has a conical shape that widens in the direction of the support 10. In addition, the outlet 22a is not provided at the upper portion of the support 10 as shown in FIG. 1, but is located on the opposite side of the inlet 22 through which water is introduced. Accordingly, when the water flowing into the inlet 12 flows into the body through the outlet 22a, the water flows in all directions along the inner surface of the cover 22a formed of the curved surface. Therefore, it is possible to supply water uniformly throughout the body.

As described above, the screw-type instant hot water generator of the present invention is made by winding a coil-shaped heating element mounted on a screw-shaped support body and inserting and coupling the cylindrical heating body to accommodate the support body. Therefore, the structure is simple and easy to manufacture, compared to the conventional instant hot water generator, it is possible to reduce the manufacturing cost. In addition, since the heating element is mounted along the spiral valley, the contact area between the water and the heating element can be maximized. Thus, water can be heated to a desired temperature within a short time.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the scope of the present invention. It is possible.

10; Support 12; Inlet
14; Connection terminals 18 and 18a; cover
20; Packing 22,22a; Outlet
24; Heating element 26; Engaging portion
28; Outlet 50; Body
100, 200; Instant Hot Water Generator

Claims (8)

A screw-like support having spiral grooves formed therein;
A heating element mounted to the bone of the support;
A body accommodating the support on which the heating element is mounted; And
Attached to one side of the support, including a cover for sealing the support to the body,
The heating element is instantaneous hot water generator using a screw-type support, characterized in that the point contact with the support at a position separated by a predetermined distance from the bottom of the bone. The instantaneous hot water generator using a screw-type support of claim 1, wherein an inlet through which water is introduced is formed on an upper surface or a body of the cover, and an outlet through which water is discharged is formed at a lower end of the body. The instantaneous hot water generator using a screw-type support, characterized in that the heating element is made of a coil of the spring form. The instantaneous hot water generator using a screw-type support of claim 1, wherein the surface of the heating element is coated with an insulating material to prevent leakage and corrosion by direct contact with the fluid. According to claim 1, Instantaneous hot water generator using a screw-shaped support, characterized in that a space is provided between the body and the support inserted into the body. According to claim 1, wherein the heating element is provided with a connection terminal that can be supplied with external power on both sides, the connection terminals are all installed through the cover is drawn out to the outside, or one side of the connection terminal is the cover Instantaneous hot water generator using a screw-shaped support, characterized in that the penetrating through the outside and the other side is installed through the near the outlet of the body is drawn out. The instantaneous hot water generator using a screw-type support, characterized in that the heating element is connected by a connector insulated from the outside at the end of the end of the bone of the support. The instantaneous hot water generator using a screw-shaped support of claim 1, wherein the cover has a conical shape that increases toward the support.

KR1020100109040A 2010-11-04 2010-11-04 Instant hot-water generator using a screw type supporting member KR20120047470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100109040A KR20120047470A (en) 2010-11-04 2010-11-04 Instant hot-water generator using a screw type supporting member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100109040A KR20120047470A (en) 2010-11-04 2010-11-04 Instant hot-water generator using a screw type supporting member

Publications (1)

Publication Number Publication Date
KR20120047470A true KR20120047470A (en) 2012-05-14

Family

ID=46266201

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100109040A KR20120047470A (en) 2010-11-04 2010-11-04 Instant hot-water generator using a screw type supporting member

Country Status (1)

Country Link
KR (1) KR20120047470A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160025481A (en) * 2014-08-27 2016-03-08 (주)한울티피씨 Apparatus for supplying hot water using vane pump and vortex heating
WO2016129780A1 (en) * 2015-02-11 2016-08-18 코웨이 주식회사 Instantaneous heating apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160025481A (en) * 2014-08-27 2016-03-08 (주)한울티피씨 Apparatus for supplying hot water using vane pump and vortex heating
WO2016129780A1 (en) * 2015-02-11 2016-08-18 코웨이 주식회사 Instantaneous heating apparatus
KR20160099154A (en) * 2015-02-11 2016-08-22 코웨이 주식회사 Instntaneous heating apparatus
EP3258186A4 (en) * 2015-02-11 2018-03-21 Coway Co., Ltd. Instantaneous heating apparatus

Similar Documents

Publication Publication Date Title
US9664414B2 (en) Dynamic flow heater
AU691395B2 (en) Polymeric resistance heating element
KR100963052B1 (en) Electric water heater element using coated helical heating wires
US11118810B2 (en) Heat transfer assembly
CN213019576U (en) Steam generator and steam generating device
CN107432056A (en) Heater
US20110129205A1 (en) Flow-through heater
KR20120047470A (en) Instant hot-water generator using a screw type supporting member
KR100900001B1 (en) Heating apparatus using metal tube heater
KR101938744B1 (en) Sheath heater packing with air hole and protrusion, and sheath heater and heating equipment using the same
CN108444092B (en) Preheater for heating liquid alloy
US20040256375A1 (en) Electrical water heating device with large contact surface
CN101796341A (en) Modular heater system
US1373809A (en) Vapor electric heater
CN203748034U (en) Ceramic electric heater used for water tank
RU195116U1 (en) Instantaneous electric heater
KR20100085468A (en) Heater for electric boiler
KR200433627Y1 (en) Electric water heater element made of twisted ceramic tube
CN108507176B (en) Electric water heater inner container and water heater
KR20120047469A (en) Hot-water generator using separating member
CN114060786B (en) Steam generator and steam generating device
EP4005342A1 (en) Electric heater
GB2149486A (en) Electrical heating appliance for a liquid
CN215637980U (en) Instant heating type heating member
KR200390203Y1 (en) Electric heater

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application