baber/WOPTO huggingface dataset:
Patent KR-20000024037-A (KR)
Inventor: PARK CHI HEUNG
Filed: 2000-01-14
Abstract: PURPOSE: A third party transactions guarantee method and system in e-commerce are provided to make credit transactions between purchaser and seller, prevent leakage of personal information and heighten reliability of commodity message. CONSTITUTION: The third party except the parties concerned of seller and purchaser deposits purchaser's money, demands the seller to send the commodity on the security of purchaser's money and make the seller pay the money deposited from purchaser with commodity receipt of purchaser and approval of payment in e-commerce. While a dispute between seller and purchaser occurs, the third party holds the money, therefore observance of just legal procedure is guaranteed by making a specified person of the parties concerned not acquire an unreasonable profit from intention or accident.
Patent KR-20000057763-A (KR)
Inventor: KIM JAE YOL
IPC: H04J13/12
Filed: 2000-01-11
Abstract: PURPOSE: A method for generating quasi-orthogonal code in CDMA communication system, and apparatus and method for expanding channel using the method is provided to increase a channel capacity by using a complex quasi-orthogonal code regardless of a limit of a orthogonal code. CONSTITUTION: A first Walsh orthogonal code generator(2060) receives a Walsh orthogonal code index(k) for a channel allocation and outputs a kth Walsh orthogonal code corresponding to the received Walsh orthogonal code index(k) to a multiplier(2040). A sign code generator(2070) receives a quasi-orthogonal code index(t) and outputs a tth sign code corresponding to the received quasi-orthogonal code index(t) to the multiplier(2040). The multiplier(2040) multiplies the inputted Walsh orthogonal code and the signal code and provides the multiplied signals to multipliers(2050,2052). The multiplier(2050) multiplies an inputted I component input signal(Xi) and a signal inputted from the multiplier(2040) and outputs the multiplied signal to a rotator(2010). The multiplier(2052) multiplies an inputted Q component input signal(Xq) and a signal inputted from the multiplier(2040) and outputs the multiplied signal to a rotator(2010). A second Walsh orthogonal code generator(2065) outputs a corresponding Walsh orthogonal code to an inputted mask index(t).
Patent KR-20010073488-A (KR)
Title: The Plastic fruits capsule with multi function for overall fruits farm
Inventor: OH JAE WAN
IPC: A01G13/02
Filed: 2000-01-15
Abstract: PURPOSE: A plastic fruit capsule with many functions for farming a fruit tree is provided to prevent damage from disease and harmful insects and to control generation of russetting and to control chromaticity by substituting a paper fruit bag for a plastic fruit protecting capsule. CONSTITUTION: The plastic fruit capsule with many functions for farming the fruit tree includes a few stages. The paper fruit bag is substituted for the plastic fruit protecting capsule. In the first stage, the thickness of a plastic container is controlled and the pigment for coloring fruits is added in the container and the intercepting materials as UV/Vis is injected into the container. In the second stage, a space for injecting agricultural chemicals is secured in the capsule for improving the delayed effect of agricultural chemicals. In the third stage, a hole is digged through for controlling the temperature and humidity, which are necessary for farming the fruit tree.
Patent KR-20010073953-A (KR)
Title: A pinch roller of a tape recorder
Inventor: KIM JAE KI
IPC: G11B15/29
Filed: 2000-01-24
Abstract: PURPOSE: A pinch roller for a tape recorder is provided to reduce number of components for saving producing cost while simplifying assembly for improving productivity through integrally injection molding a sleeve and a rotating member by using a thermoplastic resin. CONSTITUTION: A sleeve(8) and a rotating member(12) are integrally molded by using thermoplastic resin. Herein, molybdenum, melanin, graphite, or phenol resin is selectively used for the thermoplastic resin. Herein, the thermoplastic resin is injection molded to perform as the sleeve and the rotating member. Therefore, the sleeve and the rotating member composing a pinch roller(7) are integrally formed with the thermoplastic resin. Then, the thermoplastic resin is installed on the pinch roller to perform as the sleeve and the rotating member.
Patent KR-20000024297-A (KR)
Inventor: SIM SUNG SIK
IPC: G06Q40/04
Filed: 2000-02-03
Abstract: PURPOSE: A service system of stock information using internet is provided to offer clients the recommended items for stock transaction. CONSTITUTION: A service system of stock information consists of both a server loading service site of stock information and the internet terminal by which a user can connect to the sever containing an analyzing stocks program(8). The analyzing stock program selects recommended items on the basis of the judgement for both recommended standard and price trends. The service site of stock information including the displaying part of recommended items(10) displays the codes of recommended items and company's names in sequence and is divided into several sectors(12). As each sector is linked with the state table for stock price and with bargain sites(2), a client can find the state of stock prices and bargain stocks.
Patent KR-20000076650-A (KR)
IPC: C12N1/20
Filed: 2000-02-12
Abstract: 본 발명은 2-메틸퀴녹살린으로부터 2-퀴녹살린카르복실산을 미생물에 의해 제조하는 방법에 관한 것이다. 
     보다 구체적으로, 본 발명은 하기 화학식 2의 화합물을, 화학식 2의 화합물의 메틸기를 하기 화학식 1의 카르복실기로 산화시킬 수 있는 미생물과 접촉시키고, 생성 혼합물을 화학식 1의 화합물 생산에 적합한 조건 하에 인큐베이션하는, 화학식 1의 화합물의 미생물에 의한 제조 방법에 관한 것이다. 
     
       
         
       
     
     
       
         
       
     
     본 발명의 방법에 따르면, 2-메틸퀴녹살린으로부터 2-퀴녹살린카르복실산을 높은 수율로 수득할 수 있다.
Patent KR-20000024605-A (KR)
Inventor: KIM WON TAE
IPC: E02F3/88
Filed: 2000-02-23
Abstract: PURPOSE: A dredger is provided to prevent polluted material from remained in the dredger from flowing backward into water even if an operation of a suction pump is stopped while dredging. CONSTITUTION: At a suction end(12) in a dredging pipe(10), a valve(20) for preventing flowing backward is equipped so polluted material in the dredging pipe(10) as not to be flowed backward even when the operation of the suction pump is stopped. Equipping a camera(3) under the water at the suction end of the dredging pipe(10) enables to work as monitoring a state under the water while dredging. The dredger is for removing polluted materials accumulated on the bottom of the water such as a lake or a river or the sea by inhaling using the dredging pipe(10) connected to the suction pump. A prevention valve(20) of flowing backward for controlling from an office on the ground or a dredging ship is equipped at the suction end(12) of the dredging pipe(10). And at the suction end, a camera(30) for monitoring the situation under the water is equipped under the water.
Patent KR-20010084086-A (KR)
Title: Vacuum Sensor Assembly with Attahable Vacuum Sensor
Inventor: SUN GI SANG
IPC: G01L21/00
Filed: 2000-02-23
Abstract: PURPOSE: A vacuum sensor assembly is provided to simplify line structure through separating a vacuum sensor from an assembly, and to prevent a system from being broken through installing a current limiting unit. CONSTITUTION: Vacuum is supplied to a line while supplying current to a vacuum sensor(200) from a constant current circuit unit(110). Then, the vacuum sensor outputs a sensing signal to an assembly(100) according to vacuum pressure of the line. The sensing signal is applied to an offset adjust unit(120) and a differential amplify unit(130) of the assembly. The offset adjust unit adjusts offset of the sensing signal for outputting to the differential amplify unit. Then, the differential amplify unit amplifies the signal from the offset adjust unit and the vacuum sensor. A vacuum pressure state display unit(140) lights on specific LED(Light Emitting Diode) according to size of the signal from the differential amplify unit for displaying the vacuum pressure. A compare unit(150) receives the output signal of the amplify unit for comparing with a reference value in a compared value adjust unit(160). Then, a signal is outputted to a base of a first transistor in a current limit unit(170). Thus, the first transistor is turned on for turning on a second transistor. A current under a specific level is applied to the first transistor, and an output unit(180) transfers a current typed signal to a system.
Patent KR-20000036471-A (KR)
Inventor: HA JONG DAL
IPC: E04F15/16
Filed: 2000-03-16
Abstract: PURPOSE: A floor material is provided to require small material cost, to prevent noise while being soft, and not to be contracted or expanded. CONSTITUTION: A patterned wood(1) is attached on the surface of a plywood(2). Then, pieces of a material wood(3) are adhered on the lower surface of the plywood while having a certain distance. Herein, the patterned wood is appeared on the surface for representing natural material wood pattern while interposing the plywood for preventing the crack or replacement between the patterned wood and the plywood. Moreover, the pieces of the material wood are adhered on the lower portion of the plywood for supplying soft feeling while reducing noise, expansion, and contraction.
Patent KR-20010090181-A (KR)
Title: The improved method for the preparation of DL-α-tocopherol acetate
Inventor: CHOI JUN TAE
IPC: C07D311/04
Filed: 2000-03-23
Abstract: PURPOSE: Provided is a method for manufacturing DL-alpha-tocopherol acetate in high purity and high yield without adding catalyst. Therefore, it involves no removing process of catalytic substance and reduces manufacturing cost. Furthermore, it decreases industrial wastes. CONSTITUTION: DL-alpha-tocopherol acetate is characteristically manufactured by supplying reactant consisting of DL-alpha-tocopherol and acetic anhydride into a pipe type continuous reactor and acylating it at the 139-250 deg.C and 2-20 atm without catalyst. Wherein, the molar ratio of acetic anhydride to DL-alpha-tocopherol is 1-4:1.
Patent KR-20010094439-A (KR)
Title: System for wireless wap contents
Inventor: JANG JUN HO
IPC: H04B7/26
Filed: 2000-03-30
Abstract: PURPOSE: A wireless WAP(Wireless Application Protocol) contents service system is provided to offer a WAP system containing a plurality of WAP sites corresponding to the URL of a telephone number format, including wireless terminal numbers and/or country numbers, so that users can efficiently obtain desired information on the WAP sites using their wireless terminals. CONSTITUTION: A WAP system consists of a registration management system(35), a WS(WAP Site) contents configuration/management system(34), and a WSU(WS Server Unit)(33). Also the WAP system comprises a database(36), a WAP authorizing unit(32), and a main server(31). The database(36), composed of a WS-D/B(361) and a TN(Telephone Name)-D/B(362), stores WAP sites obtained from the WS contents configuration/management system(34) and registered user information corresponding to the WAP sites. The WAP authorizing unit(32) enables users to configure and edit their individual WAP sites. The main server(31) controls the operation of each component overall.
Patent KR-20010094593-A (KR)
Title: Transmission protocol selection apparatus and method for dynamic binding
Inventor: DONG SU HWAN
IPC: H04L29/06
Filed: 2000-03-31
Abstract: PURPOSE: An apparatus and a method for selecting a transport protocol for dynamic binding are provided to improve data transmission efficiency by selecting a transport protocol corresponding to a state of a current network according a property of transmitting data. CONSTITUTION: A data analyzer(301) receives and analyzes a kind and a size of data transmitted from an element management portion(30). A network analyzer(302) receives and analyzes a state of a current network from a network(50). A protocol selector(303) selects a transport protocol on the basis of the kind of the size of the analyzed data and the analyzed state of the current network. The port generator(304) generates a port number used by the selected protocol. A network service provider(305) transmits and receives a segment by using the port number generated from the port generator(304). A segment analyzer(306) analyzes the segment received through the network service provider(305).
Patent KR-20000037202-A (KR)
Inventor: LEE KYONG KUK
IPC: H04L12/24
Filed: 2000-04-11
Abstract: PURPOSE: An obstacle watching device receives hardware for communication device is provided to improve reliability of a watching device and to be able to use a low performance CPU. CONSTITUTION: An obstacle device receives hardware interrupt signal and judges whether the signal is lock signal or not. If lock signal is offered, a control unit(22) interprets CPU control signal from a CPU interface part(25) and generates watching control signal to an accumulator(26). the control unit(22) reads data in registers by hardware interrupt signal and accumulates the result in a state resister(27). If the received signal is not a lock signal, the control unit(22) makes latch signal to access hardware to a device interface part(21). The control unit(22) stores the data to a second buffer(24) using buffer control signal and generates watching control signal to the accumulator(26). The accumulator(26) reads a state of hardware device following the control signal generated the control unit(22) and increases non-zero register value. Comparing the increased register value and the value of critical value register(28), the accumulator(26) generates detection signal to the CPU interface part(25) if the increased value exceeds the critical value. the CPU interface part(25) generates CPU interrupt signal after receiving the detection signal.
Patent KR-20010095810-A (KR)
Title: The heatproof and resisting a special pressure severe double width hologram a master roll prodction a method
Inventor: LIM GI TAEK
IPC: B32B7/02
Filed: 2000-04-12
Abstract: PURPOSE: A process for preparing a wide-width hologram master roll is provided to produce the master roll having high heat-resistant and pressure-resistant property by adhering a photo-curing resin on the master roll by using a wide-width hologram plastic shim consisting of a plurality of narrow-width hologram plastic shims. CONSTITUTION: The process comprises the steps of obtaining a narrow-width PVC or polyester film(30) attached with a photo-cured resin(20) on a base plate(10) to transfer holographic images; overlapping a plurality of the narrow-width films adhered with the photo-cured resin on their bottom side each other at their one sides then cutting the overlapped parts at once; preparing a wide-width PVC or polyester film by setting the cut parts to allow the transferred holographic images to match each other and joining part or all of the films; again coating another photo-curing resin(20) onto the film(30) and locating another film(30) applied with an adhesive(31) over a top of the film(30) turned inside out after the joining process; applying another photo-curing resin having a metal-affinity over a top of the photo-cured resin side of the film; and compressing the metal-affinitive resin onto a surface of the master roll and UV-radiating compressed film to obtain the hologram master roll.
Patent KR-20010097007-A (KR)
Inventor: LEE EUL HWI
IPC: B62D1/19
Filed: 2000-04-19
Abstract: 본 발명은 자동차용 스티어링 칼럼의 충격흡수장치에 대한 것으로서, 발명의 주된 목적은 마운팅 브라켓과 스티어링 칼럼의 사이에서 경사부재를 설치한 후, 충격 발생시 이 경사부재가 충격을 흡수할 수 있도록 하므로써 충격흡수 효율을 높이고자 하는데 있는 것이다. 
     이를 위한 특징적인 실시 수단은 캡슐을 사용하여 차체에 고정할 수 있도록 U자형 요홈을 갖는 평판부와, 상기 평판부의 양측 저면에서 세로방향으로 고정된 좌, 우 한쌍의 측판으로 이루어진 마운팅 브라켓, 상기 마운팅 브라켓의 측판 사이에서 길이 방향으로 연결되는 스티어링 칼럼으로 이루어진 자동차용 조향장치에 있어서, 상기한 스티어링 칼럼의 상측 중단에 길이 방향으로 경사면을 갖는 경사부재를 용접 고정하여, 충격 발생시 이 경사부재가 마운팅 브라켓의 저면에 접촉되면서 이탈되어 충격을 흡수할 수 있도록 하는데 있다.
Patent KR-20010098154-A (KR)
Inventor: BEAK HYE JIN
Filed: 2000-04-28
Abstract: 본 발명은 포탈 서버, 데이터베이스 및 디자인용 응용프로그램을 구비하여 인터넷망을 통해 다수의 고객 디자이너들 및 구매자들과 연계되어 디자인에 관한 정보를 사이트 방문자에게 제공하고, 상기 고객 디자이너가 상기 디자인용 응용프로그램을 통해 표준모형 또는 직접모형으로 악세사리를 디자인한 후 주문신청하게 하고, 디자인 공모전 개최와 판매대행을 통해 소정의 판매수익금을 상기 고객 디자이너에게 지불함으로써, 새로운 패션 악세사리를 자연스럽게 창출하고 고객 디자이너에게 인센티브를 제공하여 회원확보가 용이하는 인터넷상에서 응용프로그램을 이용한 악세사리 포탈사이트 구축방법에 관한 것이다.
Patent KR-20010014853-A (KR)
Inventor: OKADA MASAKAZU
IPC: H01L21/762
Filed: 2000-04-29
Abstract: PURPOSE: To enable a reduction in a leakage current in a semiconductor device. CONSTITUTION: A semiconductor device is provided with an isolation insulating film 4 formed over the main surface of a semiconductor substrate 1 comprising a first conductivity type region 2 and a field-effect transistor 38a. The transistor 38a comprises a second conductivity type region 11b formed in such a way as to adjoin the film 4, a gate electrode 6a, a lower layer sidewall film 31a formed on the side surface of the electrode 6a, an upper layer sidewall film 20a, which is formed on this film 31a and contains a material different from that for the film 31a, and a high-melting point metal silicide layer 8c formed on the region 11b. The upper surface of the film 4 is positioned at the level of the main surface of the substrate 1 or is positioned under the level of the main surface and is positioned over the level of the junction interface between the regions 2 and 11b.
Patent KR-20010100581-A (KR)
Inventor: CHOI CHOONG LYEAL
Filed: 2000-05-03
Abstract: 본 발명은 제오라이트의 제조방법에 관한 것으로, 기존의 물을 첨가하는 열수합성법과는 달리 물을 첨가하지 않고 고체상태에서 단순 가열하여 제오라이트를 제조함으로서, 폐용액이 발생되지 않도록 하고, 반응계의 단위 부피당 제오라이트 생산량이 증대되도록 하며, 그 방법이 용이하도록 하기 위해, 규소와 알루미늄이 주성분으로 함유된 각종 시약혼합물을 포함하여 플라이애쉬, 연탄재 및 화산재 등과 같은 광물성 폐기물로부터 제오라이트를 합성하는 방법으로, 상기의 원료에 알칼리성 화합물 혹은 불소화 화합물과 중성염을 첨가하여 교반한 뒤, 150℃∼600℃의 온도로 0.5∼72시간 가열하는 것이다.
Patent KR-20010106780-A (KR)
Inventor: KIM JUN HYUN
Filed: 2000-05-23
Abstract: 신용카드회원 데이터베이스를 구비하여 각 회원에게 발급된 신용카드를 관리하는 신용카드 운영서버와, 신용카드회원 데이터베이스를 기반으로 하는 인터넷 카드회원 데이터베이스를 구비하여 신용카드에 대응하여 발급되는 인터넷 카드를 관리하는 인터넷 카드 운영서버를 포함하며, 인터넷 카드에는 은행서버로부터 배정되는 버퍼계좌가 연결되고, 인터넷 카드에 연결되는 버퍼계좌로 일정금액이 이체된 후에 인터넷 카드가 사용 가능하게 되는 인터넷 기반의 전자 지불시스템이 개시된다.
Patent KR-20010107031-A (KR)
Inventor: LEE SANG YUN
IPC: G01N21/00
Filed: 2000-05-24
Abstract: 본 발명에 따라 집적광학 소자를 구성하는 광도파로 내로 진행하는 광파를 추적하여 상기 집적광학 소자의 성능을 분석하는 방법은, 상기 광도파로의 길이 방향을 따라 상기 광파의 샘플링(sampling) 위치들을 설정하는 제1 단계와; 상기 각 샘플링 위치에서 상기 광파의 전계 분포를 도출하는 제2 단계와; 상기 전계 분포의 위상 정보로부터 상기 광파의 파면을 추출하고, 상기 파면의 지향 각도를 계산하는 제3 단계와; 상기 제1 내지 제3 단계를 통하여 얻어진 상기 광파의 전파 거리에 따른 상기 파면의 지향 각도의 변화로부터 상기 집적광학 소자의 성능을 분석하는 제4 단계를 포함한다.
Patent KR-20010109764-A (KR)
Inventor: PARK SEONG GEUN
Filed: 2000-06-02
Abstract: 본 발명은, 스터드핀을 흡착하는 핀척과, 상기 스터드핀을 발열시켜 음극선관용 패널에 융착시키도록 유도기전력을 발생시키는 가열장치를 구비한 음극선관용 패널의 핀융착장치에 관한 것으로서, 상기 가열장치에서 발생되는 유도기전력을 측정하는 유도기전력측정부와; 상기 유도기전력측정부로부터의 측정결과값이 기준값에 비해 소정 허용범위를 벗어났을 경우 오류신호를 발생시키는 제어부를 포함하는 것을 특징으로 한다.  이에 의하여, 핀척에 스터드핀이 흡착되지 않은 상태로 일련의 핀융착공정이 수행되는 것을 방지할 수 있도록 한 음극선관용 패널의 핀융착장치가 제공된다.
Patent KR-20020003628-A (KR)
Title: A paper coffin for cremation
Inventor: HWANG CHEIL SUNG
IPC: A61G17/00
Filed: 2000-06-21
Abstract: PURPOSE: A paper coffin for cremation is provided to promote fast cremation through high inflammability and to minimize the remaining after cremation by compressing plural sheets of corrugated cardboard having light-weight structure and high quality of impact resistance in manufacturing process of a paper coffin. CONSTITUTION: A body(2) and a cover(4) of a paper coffin are produced by waste corrugated cardboard or other various kinds of waste paper. The waste corrugated cardboard is compressed to have proper thickness. The waste corrugated cardboard is folded in box type having a space portion and then folded along a folding line. Copper plates are layered inside and outside wall surfaces folded along the folding line. The copper plates are bonded with the wall surfaces integrally to keep excellent strength. Four corner sides of the wall surfaces are closely adhered each other by a bonding agent to form a case having the space portion. Relatively thin inner paper(10) is inserted into the inner space of the body, and cushion material(12) and a sheet(14) are layered from the bottom of the inner paper. The cover is laid thereon. Cushion material(12a) is formed inside the cover to have excellent strength. Plural holes(18) are formed on the inner paper and the cover to fix the cover firmly. The paper coffin is burnt easily and the remaining of the coffin is collected simply. Therefore, the paper coffin has effects of promoting the recycling of green waste matter.
Patent KR-20020001436-A (KR)
Title: Apparatus for removing burr on edges of strips
Inventor: CHO SANG HUI
IPC: B21B15/00
Filed: 2000-06-28
Abstract: PURPOSE: An apparatus for removing burr on edge of strip is provided which minimizes abrasion of the burr masher rolls by alternately closely adhering burr generated on the edge of the strip to the surface of the strip using a pair of burr masher rolls, and promptly removes burr on the edge thereof by variably adjusting positions of the burr masher rolls depending on the width of the strip. CONSTITUTION: In an apparatus(1) for removing burr of the edge of strip with steel rolls and burr masher rolls so as to remove burr on the edge of the strip passing through the trimming operation, the apparatus for removing burr on the edge of the strip comprises a frame member equipped with screw bars(12) which are installed at the lower side of the strip and rotated in an opposite direction each other, and a guide bar(14) which is installed at the lower side of the screw bars(12); moving members(30) which are installed so that they are moved along the guide bar(14) and the screw bars(12), and to the upper side of which roll connection parts(32) are rotationally connected so that they are attached to or detached from the moving members(30); and plural burr masher rolls(50a,50b) which are detachably installed at the roll connection parts(32) and alternately closely adhered to the edge(2) of the strip under the steel roll(4).
Patent KR-20020006075-A (KR)
Title: An angle controlling appartus of AV front pannel for automobile
Inventor: KIM GYEONG UK
IPC: F16M11/10
Filed: 2000-07-11
Abstract: PURPOSE: An angle adjuster of an AV(Audio/Video) front panel for a vehicle is provided to adjust the angle of a screen, and to open and close a panel by adding a front panel opening and closing apparatus applying a mechanical link, and to insert or withdraw a recording medium by using two deck mechanisms. CONSTITUTION: An angle adjusting device of an AV front panel for a vehicle is composed of a motion transmitting unit converting the rotation into the horizontal movement; a rotating unit turning a front panel without an additional rotating track; a rotation transmitting unit transmitting rotating force from a motor to the rotating unit for rotation of the front panel; and a front panel opening unit opening and closing the front panel completely by the motion transmitting unit, the rotation transmitting unit and the rotating unit. The AV front panel is opened completely to make the best use of space, and the angle of the screen is adjusted with mounting the front panel opening apparatus in the AV front panel. The recording medium is input or output with applying two deck mechanisms.
Patent KR-20020006295-A (KR)
Inventor: KIM JONG MIN
IPC: A63C19/10
Filed: 2000-07-12
Abstract: PURPOSE: An indoor ski structure is provided to enable a user to always enjoy skiing, snow board play, and sledge riding play free from weather restraints, and to maintain the temperature of the interior thereof at a low degree by use of an effective method. CONSTITUTION: The indoor ski structure comprises a snow removing device, a slope of a desired angle, and an air conditioning system of heat pump type having a cooling circuit and a heating circuit. Each circuit consists of a heat pump compressor(201), a switching valve, an exterior heat exchanger(211), a decompression device, and an interior heat exchanger(203,206), which are connected in series. In the interior heat exchanger of the cooling circuit, the compressed coolant flows toward the compressor after completing the heat exchange work. The interior heat exchanger for the heating circuit is designed into a double tube form, thus the compressed coolant is circulated in the inner tube of the interior heat exchanger, and a hot water is circulated in the outer tube thereof.