KR950702692A - Heat-storage unit for electrical heat heaters - Google Patents

Heat-storage unit for electrical heat heaters Download PDF

Info

Publication number
KR950702692A
KR950702692A KR1019950700390A KR19950700390A KR950702692A KR 950702692 A KR950702692 A KR 950702692A KR 1019950700390 A KR1019950700390 A KR 1019950700390A KR 19950700390 A KR19950700390 A KR 19950700390A KR 950702692 A KR950702692 A KR 950702692A
Authority
KR
South Korea
Prior art keywords
heat storage
wall
storage block
heat
container
Prior art date
Application number
KR1019950700390A
Other languages
Korean (ko)
Inventor
에리히 폴만
Original Assignee
게이트-디에트마르 코흘루쉬·우베 쇼를레머
카카더블류 쿨름바헤르 클리마게뢰테-베르크 게엠베하
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 게이트-디에트마르 코흘루쉬·우베 쇼를레머, 카카더블류 쿨름바헤르 클리마게뢰테-베르크 게엠베하 filed Critical 게이트-디에트마르 코흘루쉬·우베 쇼를레머
Publication of KR950702692A publication Critical patent/KR950702692A/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/02Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
    • F24H7/04Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid
    • F24H7/0408Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply
    • F24H7/0416Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply the transfer fluid being air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/02Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
    • F24H7/04Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/002Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release using electrical energy supply

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)
  • Central Heating Systems (AREA)
  • Cookers (AREA)
  • Thermal Insulation (AREA)
  • Control Of Resistance Heating (AREA)
  • Resistance Heating (AREA)

Abstract

열 저장블록은 열 저장 충전재(4)를 고정하는 내부 용기(10)와, 약간의 간격을 두고 내부 용기를 둘러싸는 외부 용기(9)를 구비한다. 우 용기의 림은 상호 밀봉상태로 연결된다. 가열 요소(5)가 관통하는 단열 덮개(12)는 이중벽 구조로 된 용기의 입구를 폐쇄한다. 내부 및 외부 용기 사이의 공간(6)은 안이 비워지고 흡수장치(8)에 연결된다. 흡수장치(8)가 가열되면, 가스는 두 용기의 벽 사이로 유입되어 그 안을 증가된 압력으로 채움으로써 내부 용기(10)에서 외부 용기(7)로 열전달이 이루어진다. 두 용기의 벽 사이의 공간(6)에 배치되는 방사차폐부재(15)는 방사열이 내부 용기에서 외부 용기로 통과하는 것을 방지한다.The heat storage block has an inner container 10 which holds the heat storage filler 4 and an outer container 9 which surrounds the inner container at some distance. The rim of the container is connected in a sealed state. The insulating cover 12 through which the heating element 5 penetrates closes the inlet of the double walled container. The space 6 between the inner and outer container is hollowed out and connected to the absorber 8. When the absorber 8 is heated, heat is transferred from the inner vessel 10 to the outer vessel 7 by introducing gas between the walls of the two vessels and filling them with increased pressure. The radiation shield member 15 disposed in the space 6 between the walls of the two vessels prevents radiant heat from passing from the inner vessel to the outer vessel.

Description

전열 저장 가열기용 열 저장블록(HEAT-STORAGE UNIT FOR ELECTRICAL HEAT ACCUMULATORS)Heat-storage unit for electric heat heaters

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 열 저장블록의 바람직한 실시예의 수직 단면도.1 is a vertical sectional view of a preferred embodiment of a heat storage block according to the invention.

제2도는 본 발명에 따른 열 저장블록의 흡수장치의 영역의 확대도.2 is an enlarged view of the area of the absorber of the heat storage block according to the invention.

제3도는 외부 하우징이 부분적으로 개방된 본 발명에 따른 전열저장 가열기의 바람직한 실시예의 개략 사시도.3 is a schematic perspective view of a preferred embodiment of the electrothermal storage heater according to the invention with the outer housing partially open.

Claims (20)

외벽(2)과, 외벽의 내부에 그로부터 약간의 간격을 두고 배열되는 내벽(3)과, 열 저장 충전재(4)와, 열 저장 충전재(4)내에 배열되고 외부에 연결되는 전기 가열 요소(5)를 갖춘 전열 저장 가열기용 열 저장블록으로서, 외벽(2)및 내벽(3)이 상호 밀봉상태로 연결되고, 외벽(2)과 내벽(3)에 의해 둘러싸이는 절연공간(6)이 사실상 수소가스 또는 다른 가스로만 채워지고, 절연공간(6)내의 가스압력은 연결된 가스흡수장치(8)에 의해 변동되는 열 저장블록에 있어서, 외벽(2)은 단면이 거의 원형, 바람직하게는 타원형으로 이루어진 외부 용기(9)에 의해 구성되고, 내벽(3)은 대응하는 단면의 직경 및 높이가 다소 작은 내부 용기(10)에 의해 구성되며, 상기 용기는 상부 주변 가장자리(11)에서 밀봉상태로 상호 연결되고, 용기(9, 10)의 상부 개구 단부는 덮개(12)에 의해 단열되어 있는 것을 특징으로 하는 열 저장블록.An outer wall 2, an inner wall 3 arranged at some distance from the inside of the outer wall, a heat storage filler 4 and an electric heating element 5 arranged in the heat storage filler 4 and connected to the outside A heat storage block for an electrothermal storage heater having an outer wall (2) and an inner wall (3) connected to each other in a sealed state, and the insulating space (6) surrounded by the outer wall (2) and the inner wall (3) is in fact hydrogen. In a heat storage block filled only with gas or other gas and whose gas pressure in the insulating space 6 is varied by the connected gas absorber 8, the outer wall 2 has a substantially circular cross section, preferably elliptical in cross section. It is constituted by an outer container 9 and the inner wall 3 is constituted by an inner container 10 which is somewhat smaller in diameter and height in the corresponding cross section, which is interconnected in a sealed state at the upper peripheral edge 11. The upper opening ends of the containers 9, 10 are closed by a lid 12. The heat storage block, characterized in that. 제1항에 있어서, 용기 (9, 10)의 베이스(13, 14)는 아래쪽/외측으로 구부러지고, 바람직하게는 적어도 내부 용기(10)가 디프 드로잉 가공되는 것을 특징으로 하는 열 저장블록.The heat storage block according to claim 1, wherein the base (13, 14) of the container (9, 10) is bent downwards / outwards, preferably at least the inner container (10) is deep drawn. 제1항 또는 제2항에 있어서, 절연공간내에는 섬유성분이 함유되지 않은 재료, 예를 들어 풍화한 흑운모가 배열되는 것을 특징으로 하는 열 저장블록.The heat storage block according to claim 1 or 2, wherein a material containing no fiber component, for example, weathered biotite, is arranged in the insulating space. 제3항에 있어서, 방사 차폐부재 (15)가 다층 나선형으로 감겨지고, 돌기를 갖춘 알루미늄 호일로 구성되는 것을 특징으로 하는 열 저장 블록.4. The heat storage block according to claim 3, wherein the radiation shield member (15) is made of aluminum foil wound in a multi-layered spiral and having projections. 제4항에 있어서, 다층의 나선형으로 감긴 방사 차폐부재(15)는 권선 방향에 수직하는 슬릿형 차단부재를 구비하여 열전도를 감소시키는 것을 특징으로 하는 열 저장블록.5. The heat storage block according to claim 4, wherein the multi-layered spirally wound radiation shielding member (15) has a slit blocking member perpendicular to the winding direction to reduce heat conduction. 제1항 내지 제5항 중 어느 한항에 있어서, 덮개(12)는 절연공간을 갖춘 이중벽 구조로 되어 있고, 섬유성분이 함유되지 않은 재료로 된 단열층(21)이 열 저장 충전재(4) 및 덮개(12)간에 배열되는 것을 특징으로 하는 열 저장블록.6. The cover 12 according to any one of claims 1 to 5, wherein the cover 12 has a double wall structure with an insulating space, and the heat insulating layer 21 made of a material free of fibrous components is the heat storage filler 4 and the cover. (12) a heat storage block, characterized in that arranged between. 제1항 내지 제6항중 어느 한항에 있어서, 덮개(12)는 용접, 납땜, 아교접착 또는 다른 방법으로 주변 가장자리(11)에서 용기(9, 10)에 영구히 그리고 확고히 연결되는 것을 특징으로 하는 열 저장블록.7. The heat according to claim 1, wherein the lid 12 is permanently and firmly connected to the containers 9, 10 at the peripheral edge 11 by welding, soldering, gluing or otherwise. Storage block. 제1항 내지 제6항중 어느 한항에 있어서, 덮개(12)는 파지 조임링의 형태로 된 해제가능한 파지장치(22)에 의해 주변 가장자리(11)에서 용기(9, 10)에, 확고히 그러나 해제가능하게 연결되는 것을 특징으로 하는 열 저장블록The cover 12 is firmly but released from the peripheral edge 11 to the container 9, 10 by means of a releasable gripping device 22 in the form of a gripping fastening ring. Thermal storage block, characterized in that connected to possible 제1항 내지 제8항중 어느 한항에 있어서, 덮개(12)는 가열 요소(5)용 단열관(23) 및 가열 요소(5)의 연결 리드(24)를 구비하며, 상기 관(23)에 의해 덮개(12)를 제거함이 없이 가열 요소(5)률 교체할 수 있는 것을 특징으로 하는 열 저장블록.The cover (12) according to claim 1, wherein the cover (12) comprises a heat insulating tube (23) for the heating element (5) and a connecting lead (24) of the heating element (5). Heat storage block, characterized in that the heating element 5 can be replaced without removing the cover 12. 제1항 내지 제9항중 어느 한항에 있어서, 열 저장 충전재(4)에는 중금속이 포함되지 않으며, 그 기하학적 구성은 내부 용기(10)의 벽에 따라 구성되는 것을 특징으로 하는 열 저장블록.10. Heat storage block according to any of the preceding claims, characterized in that the heat storage filler (4) does not contain heavy metals, the geometry of which is configured along the walls of the inner container (10). 제1항 내지 제10항중 어느 한항에 있어서, 열 저장 충전재(4)는 기공이 녹기 쉬운 무기재료로 채워지는 내화 벽돌재료로 구성됨으로써, 저장 용량이 증가되는 것을 특징으로 하는 열 저장블록.The heat storage block (1) according to any one of the preceding claims, wherein the heat storage filler (4) consists of a refractory brick material filled with an inorganic material that is likely to melt pores, thereby increasing the storage capacity. 제1항 내지 제11항중 어느 한항에 있어서. 열 저장 충전재(4)는 개개의 환상 열 저장벽돌(25)로 구성되고, 열 저장벽돌(25)은 편평한 표면을 구비하며, 가장 아래쪽의 열 저장벽돌(25) 및 내부 용기(10)의 구부러진 베이스(14) 사이에는 섬유성분이 함유되지 않은 재료, 예를 들어 풍화성 혹운모로 된 편평한 상부를 갖춘 아래로 구부러진 단열층(26)이 제공되는 것을 특징으로 하는 열 저장블록.The method according to any one of claims 1 to 11. The heat storage filler 4 is composed of individual annular heat storage bricks 25, the heat storage bricks 25 having a flat surface, and the bottom of the heat storage bricks 25 and the inner container 10 are bent. Between the bases 14 there is provided a down curved insulating layer 26 having a flat top of a fibrous-free material, for example weathering mica. 제1항 내지 제12항 중 어느 한항에 있어서. 외부 용기(9)의 내벽에는, 단부가 용기(5) 밖으로 밀봉상태로 통과하는 이차 열 캐리어, 예를들어 가열 또는 용수용의 적어도 하나의 관(31)이 배열되어 있는 것을 특징으로 하는 열 저장블록.The method according to any one of claims 1 to 12. On the inner wall of the outer container 9 there is arranged a heat storage, characterized in that a secondary heat carrier, for example at least one tube 31 for heating or water, is arranged in which the end passes in a sealed state out of the container 5. block. 제1항 내지 제13항중 어느 한항에 있어서, 외부 용기(9)의 외벽에는, 이차 열 캐리어, 예를 들어 가열 또는 용수용의 적어도 하나의 관(33)이 배열되어 있는 것을 특징으로 하는 열 저장블록.The heat storage according to any one of claims 1 to 13, characterized in that the outer wall of the outer container (9) is arranged with at least one tube (33) for secondary heat carriers, for example, heating or water. block. 제1항 내지 제14항중 어느 한항에 있어서, 용기(9, 10)는 열 팽창계수가 다른 재료, 예를 들어 불변강과 철로 구성됨으로써, 내부의 온도가 높은 용기(10)의 열 팽창은 외부의 온도가 낮은 용기(9)의 열팽창계수에 거의 대응하는 것을 특징으로 하는 열 저장블록.15. The vessel 9, 10 according to any one of the preceding claims, wherein the vessels 9, 10 are made of a material having a different coefficient of thermal expansion, for example invariant steel and iron, so that the thermal expansion of the vessel 10 having a high internal temperature A heat storage block, characterized in that it substantially corresponds to the coefficient of thermal expansion of the low temperature vessel (9). 제1항 내지 제15항중 어느 한항에 있어서, 외부 용기(9)의 외벽에는, 단열이 부직절한 경우에 벽의 온도가 안전을 고려하여 사전설정된 값, 예를 들어 150℃를 초과하는 즉시 열 저장 충전재(4)의 재충전을 방지하는 온도 센서(34)가 배열되어 있는 것을 특징으로 하는 열 저장블록The outer wall of the outer container (9) according to any one of the preceding claims, wherein the temperature of the wall in the event of insufficiency is improperly stored immediately after the temperature exceeds a predetermined value, for example 150 ° C., for safety considerations. Thermal storage block, characterized in that arranged in the temperature sensor 34 to prevent recharging of the filler material 4 제1항 내지 제16항중 어느 한항에 있어서, 흡수장치의 가열기(19)는 다단계 구성으로 이루어지고, 적어도 이단계의 바람직하게는 실온에 기초하여 동작하는 스위치에 의해 제어되는 것을 특징으로 하는 열 저장블록.17. Heat storage according to any one of the preceding claims, wherein the heater 19 of the absorber is of a multistage configuration and is controlled by a switch operating at least in two stages, preferably based on room temperature. block. 제1항 내지 제16항중 어느 한항에 있어서, 흡수장치(8)의 가열기(19)의 출력부는, 바람직하게는 실온의 실제값과 소정값의 편이에 따라, 전자 제어기에 의해 무단계로 또는 다단게로 제어될 수 있는 것을 특징으로 하는 열 저장블록.17. The output of the heater 19 of the absorber 8 according to any one of the preceding claims, preferably steplessly or multistage by the electronic controller, preferably in accordance with the deviation between the actual value and the predetermined value at room temperature. Thermal storage block, characterized in that can be controlled by. 사전설정된 깊이를 갖춘 외부 하우징(27)과 외부 하우징(27)내에 배치되는 열 저장블록(1)을 갖춘 전열 저장 가열기에 있어서, 열 저장블록(1)은 거의 원형 또는 타원형 용기 형상의 단면으로 구성되고, 그 직경은 외부 하우징(27)외 깊이에 따라 결정되고, 특히 제1항 내지 제18항에 따라 구성되며, 다수의 열 저장블록(1)이 소정의 열 저장용량에 따라 그리고 외부 하우징(27)의 폭에 따라 외부 하우징(27)내에서 나란히 배열되는 것을 특징으로 하는 전열 저장 가열기.In an electrothermal storage heater having an outer housing 27 having a predetermined depth and a heat storage block 1 disposed in the outer housing 27, the heat storage block 1 consists of a cross section of a substantially circular or elliptical vessel shape. The diameter is determined in accordance with the depth outside the outer housing 27, in particular in accordance with claims 1 to 18, wherein a plurality of heat storage blocks 1 are arranged in accordance with a predetermined heat storage capacity and according to the outer housing ( Electrothermal storage heater, characterized in that arranged side by side in the outer housing (27) according to the width of the (27). 제19항에 있어서, 열 저장블록(1)은 벽 브래킷상에 베이스없이 장착되고, 바람직하게는 래커가 칠해진 강판으로 되어 있고, 바람직하게는 바닥까지 연장되고 벽 및 브래킷에 고정되고 상부 및 하부 공기 유동 개구를 갖춘 인버트 케이싱으로 덮여지는 것을 특징으로 하는 전열 저장 가열기.20. The heat storage block (1) according to claim 19, wherein the heat storage block (1) is mounted without a base on the wall bracket, preferably of lacquered steel, preferably extending to the bottom and fixed to the wall and the bracket and to the upper and lower air. An electrothermal storage heater characterized by being covered with an invert casing with a flow opening. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950700390A 1992-08-06 1993-08-06 Heat-storage unit for electrical heat heaters KR950702692A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DEG9210538.6 1992-08-06
DE9210538 1992-08-06
DEG9311217.3 1993-07-27
DE9311217U DE9311217U1 (en) 1992-08-06 1993-07-27 Heat storage block for an electric heat storage heater
PCT/EP1993/002102 WO1994003763A1 (en) 1992-08-06 1993-08-06 Heat-storage unit for electrical heat accumulators

Publications (1)

Publication Number Publication Date
KR950702692A true KR950702692A (en) 1995-07-29

Family

ID=25959785

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950700390A KR950702692A (en) 1992-08-06 1993-08-06 Heat-storage unit for electrical heat heaters

Country Status (10)

Country Link
EP (1) EP0653041A1 (en)
JP (1) JPH07509773A (en)
KR (1) KR950702692A (en)
BG (1) BG99391A (en)
CZ (1) CZ16195A3 (en)
DE (1) DE9311217U1 (en)
HU (1) HUT68712A (en)
PL (1) PL306727A1 (en)
SK (1) SK3895A3 (en)
WO (1) WO1994003763A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1264692B1 (en) * 1993-07-08 1996-10-04 Getters Spa GETTER COMBINATION SUITABLE FOR REVERSIBLE VACUUM INSULATING SHIRTS
DE102013003357B4 (en) * 2013-02-27 2021-07-01 Jobst Kerspe Combined storage and heating device
CN103245057A (en) * 2013-05-22 2013-08-14 朱建新 Electric heat accumulation type hot blast stove
DE102013107463A1 (en) * 2013-07-15 2015-01-15 Jan Holub Heat storage for installation in a building

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152033A (en) * 1960-06-17 1964-10-06 Little Inc A Insulating assembly
FR1525530A (en) * 1966-06-01 1968-05-17 British Oxygen Co Ltd Composite sheet material, substantially impermeable to gas and highly heat insulating
NL7108700A (en) * 1971-06-24 1972-12-28
JPS5849A (en) * 1981-06-22 1983-01-05 Zojirushi Vacuum Bottle Co Vacuum double walled vessel
DE3304511A1 (en) * 1981-10-22 1984-08-16 Küppersbusch AG, 4650 Gelsenkirchen Heat storage oven
JPS5940456B2 (en) * 1982-01-18 1984-10-01 舟久保 照康 Manufacturing method of metal vacuum insulation container
FR2614607B1 (en) * 1987-04-30 1989-07-13 Air Liquide SHUTTERING DEVICE FOR CRYOGENIC CONTAINER

Also Published As

Publication number Publication date
BG99391A (en) 1995-10-31
HUT68712A (en) 1995-07-28
CZ16195A3 (en) 1995-07-12
JPH07509773A (en) 1995-10-26
SK3895A3 (en) 1995-07-11
PL306727A1 (en) 1995-04-03
DE9311217U1 (en) 1993-11-18
WO1994003763A1 (en) 1994-02-17
HU9500340D0 (en) 1995-03-28
EP0653041A1 (en) 1995-05-17

Similar Documents

Publication Publication Date Title
US4819612A (en) Self-heating container
US3798418A (en) Electric heating mantles
ES2205307T3 (en) EXOTHERMAL REACTIONS AND METHODS.
US4949680A (en) Water heater having filling dip tube
US3874365A (en) Self-contained immersion exothermic fuel charge
KR950702692A (en) Heat-storage unit for electrical heat heaters
US5054437A (en) Storage tank for water heaters and the like with collector outlet dip tube
US2650575A (en) Water heater flue construction
US1047389A (en) Heater.
CN204839109U (en) Cook condenser of ware and ware that is used for cooking
CN106136875A (en) The electric cooking appliance of low noise
US5122926A (en) Housing for an electric device
US1573872A (en) Portable heating device
US3767366A (en) Cooled oxygen producing unit
EP1178704A2 (en) Container equipped with a thermally self regulated heater, applicable inparticular for heating substances to be maintained at a constant temperature.
CN207050214U (en) A kind of heated by natural gas device for being capable of temperature control
CN204909013U (en) Cook condenser of ware and ware that is used for cooking
US1273646A (en) Container.
US2399318A (en) Fluid heater
JPH046673Y2 (en)
SU1532770A1 (en) Cryogenic tank
NL7906543A (en) Explosion proof space heating unit - comprises tubes between top vessel and bottom one filled with vaporisable fluid
US412085A (en) Chaeles halstead
JPH01187794A (en) Microwave heat accumulator and heat-insulating apparatus utilizing microwave heat emission
KR880003772Y1 (en) Under-heater type furnaces

Legal Events

Date Code Title Description
WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid