KR100780892B1 - Heater element for air heater of internal combustion engine - Google Patents

Heater element for air heater of internal combustion engine Download PDF

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Publication number
KR100780892B1
KR100780892B1 KR1020060078527A KR20060078527A KR100780892B1 KR 100780892 B1 KR100780892 B1 KR 100780892B1 KR 1020060078527 A KR1020060078527 A KR 1020060078527A KR 20060078527 A KR20060078527 A KR 20060078527A KR 100780892 B1 KR100780892 B1 KR 100780892B1
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South Korea
Prior art keywords
heater element
heater
housing
internal combustion
combustion engine
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KR1020060078527A
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Korean (ko)
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김완식
김승회
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우진공업주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
    • F02M31/13—Combustion air
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)

Abstract

A heater element for an air heater of an internal combustion engine is provided to easily attach or remove the heater element onto or from a housing of an air heater by using tightening members equipped at both ends of the heater element. A heater element(40) has both ends jointed with respective tightening members(50). Each tightening member has one end with a recess(55) for joint with a bolt for tightening both ends of the heater element to a housing of an air heater. The tightening member has a bent portion(56) formed at one side of the recess. The end of the heater element is fitted into the bent portion and welded.

Description

내연기관용 에어히터의 히터엘레먼트{Heater element for air heater of internal combustion engine}Heater element for air heater of internal combustion engine

도 1은 종래의 내연기관용 에어히터의 히터엘레먼트의 사시도,1 is a perspective view of a heater element of a conventional air heater for an internal combustion engine;

도 2는 도 1의 히터엘레먼트가 결합된 종래의 내연기관용 에어히터의 사시도, Figure 2 is a perspective view of a conventional air heater for an internal combustion engine coupled to the heater element of Figure 1,

도 3은 본 발명의 히터엘레먼트의 사시도,3 is a perspective view of a heater element of the present invention,

도 4는 도 3의 히터엘레먼트가 결합된 내연기관용 에어히터의 사시도이다.4 is a perspective view of an air heater for an internal combustion engine coupled to the heater element of FIG. 3.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 : 에어히터 10 : 하우징1: air heater 10: housing

20 : 절연브라켓 25 : 결합홈20: insulation bracket 25: coupling groove

30,40: 히터엘레먼트 35,55 : 관통홈30,40: heater element 35,55: through groove

50 : 고정부재 56 : 절곡부50: fixing member 56: bent portion

60 : 고정볼트 65 : 너트60: fixing bolt 65: nut

본 발명은 내연기관에 장착되어 흡입되는 공기를 예열하는 연소 보조장치인 내연기관용 에어히터의 히터엘레먼트에 관한 것으로서, 보다 구체적으로는 히터엘레먼트의 양단에 별도의 고정부재를 구비하여 고정부재에 형성된 관통홈에 고정볼트를 끼워 히터엘레먼트의 양단을 에어히터의 하우징에 고정할 수 있게 함으로써, 히터엘레먼트의 크기와 상관없이 하우징에 용이하게 결합하거나 분해할 수 있는 내연기관용 에어히터의 히터엘레먼트에 관한 것이다.The present invention relates to a heater element of an air heater for an internal combustion engine, which is a combustion auxiliary device that is mounted on an internal combustion engine and preheats inhaled air, and more specifically, a penetration formed in the fixing member by providing a separate fixing member at both ends of the heater element. The present invention relates to a heater element of an internal combustion engine air heater which can be easily coupled or disassembled to a housing regardless of the size of the heater element by inserting a fixing bolt into a groove to fix both ends of the heater element to the housing of the air heater.

일반적으로 내연기관용 에어히터는 디젤엔진 자동차의 저온 시동성 향상과, 연소효율을 향상시키기 위한 연소 보조장치로서 디젤엔진의 내부로 흡입되는 공기를 예열하는 것이다.In general, the air heater for the internal combustion engine is to preheat the air sucked into the diesel engine as a combustion auxiliary device for improving low temperature startability and improving combustion efficiency of a diesel engine vehicle.

종래의 에어히터에 결합되는 히터엘레먼트는 양단부에 형성된 관통공이나 관통홈에 고정 및 통전역할을 할 수 있는 고정볼트가 끼워지고, 이 고정볼트를 하우징의 내측에서 외측으로 관통결합한 후, 하우징 외측으로 돌출되는 고정볼트의 단부에 너트가 체결됨으로써, 하우징에 고정된다.The heater element coupled to the conventional air heater is fitted with a fixing bolt that can be fixed and energized in the through-holes or through-holes formed in both ends, and the fixing bolt penetrates from the inside of the housing to the outside, and then to the outside of the housing. The nut is fastened to the end of the fixing bolt protruding, thereby being fixed to the housing.

그러나 상기와 같은 종래의 히터엘레먼트의 고정구조는 다음과 같은 문제점들이 있었다.However, the conventional fixing structure of the heater element has the following problems.

첫째, 히터엘레먼트가 초소형인 경우에는 양단부에 고정볼트를 끼울 수 있는 관통공이나 관통홈을 가공하는 것이 용이하지 않은 문제점이 있었으며, 둘째, 히터엘레먼트가 초소형인 경우에 관통공이나 관통홈도 작게 형성되어 히터엘레먼트의 양단부를 하우징에 결합하거나 분해하는 것이 용이하지 않을 뿐 아니라, 유지보수 가 용이하지 않은 문제점이 있었다.First, when the heater element is very small, there is a problem in that it is not easy to process the through hole or the through groove which can be fitted with the fixing bolts at both ends. Second, when the heater element is very small, the through hole or the through groove is also formed small. Therefore, both ends of the heater element are not easy to disassemble or disassemble the housing, and there is a problem in that maintenance is not easy.

본 발명은 상기와 같은 문제점을 해결하기 위해 안출한 것으로서, 고정볼트가 결합될 수 있는 관통홈이 구비된 고정부재를 히터엘레먼트 양단에 별도로 구비함으로써, 히터엘레먼트의 크기와 상관없이 고정볼트가 끼워지는 관통홈을 용이하게 가공할 수 있게 하고, 또한, 초소형 히터엘레먼트의 경우에도 상대적으로 큰 고정부재에 큰 관통홈을 형성하는 것이 가능하여 히터엘레먼트의 결합 및 분해가 용이할 뿐 아니라, 유지 보수가 용이한 내연기관용 에어히터의 히터엘레먼트를 제공하는 것이다.The present invention has been made to solve the above problems, by having a fixing member having a through groove to which the fixing bolt can be coupled to both ends of the heater element, the fixing bolt is fitted regardless of the size of the heater element The through grooves can be easily machined, and in the case of a very small heater element, it is possible to form a large through groove in a relatively large fixing member, so that the heater elements can be easily combined and disassembled, and the maintenance is easy. It is to provide a heater element of an air heater for an internal combustion engine.

상기 목적을 달성하기 위하여 본 발명은 내연기관에 흡입되는 공기를 예열하는 내연기관용 에어히터의 히터엘레먼트에 있어서, 상기 히터엘레먼트는 양단을 하우징에 고정하기 위한 고정볼트가 결합될 수 있게 일단부에 일측이 개방된 관통홈이 형성된 고정부재가 양단에 각각 결합된다.In order to achieve the above object, the present invention provides a heater element of an air heater for an internal combustion engine that preheats the air sucked into an internal combustion engine, wherein the heater element has one side at one end thereof so that fixing bolts for fixing both ends to the housing can be coupled. Fixing members having the open through grooves are coupled to both ends, respectively.

본 발명의 상기 고정부재는 상기 관통홈의 일측부에 절곡부를 구비하고, 상기 절곡부에 상기 히터엘레먼트의 단부를 끼워 용접 결합할 수 있다.The fixing member of the present invention may be provided with a bent portion at one side of the through groove, and welded to the bent portion by inserting an end of the heater element.

이하 본 발명에 대하여 도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 종래의 내연기관용 에어히터의 히터엘레먼트(30)의 사시도를 나타낸 것이고, 도 2는 도 1의 히터엘레먼트(30)가 결합된 종래의 내연기관용 에어히터의 사시도를 나타낸 것이다.1 is a perspective view of a heater element 30 of a conventional air heater for an internal combustion engine, and FIG. 2 is a perspective view of a conventional internal combustion engine air heater to which the heater element 30 of FIG. 1 is coupled.

에어히터(1)는 자동차에 장착되는 내연기관인 디젤엔진에 설치되어 엔진내부로 유입되는 공기를 예열함으로써, 자동차의 저온 시동성을 향상시키고, 연소효율을 높일 뿐 아니라, 배기가스 저감에 기여하는 연소 보조장치이다.The air heater 1 is installed in a diesel engine, which is an internal combustion engine mounted on a car, to preheat the air flowing into the engine, thereby improving the low temperature startability of the car, increasing combustion efficiency, and contributing to the reduction of exhaust gas. Device.

도시된 바와 같이, 에어히터(1)는 열이 발생되는 히터엘레먼트(30)와 이 히터엘레먼트(30)를 지지하는 절연브라켓(20) 및 하우징(10)으로 구성된다.As shown, the air heater 1 is composed of a heater element 30 that generates heat, an insulating bracket 20 and a housing 10 for supporting the heater element 30.

히터엘레먼트(30)는 열을 발생시키는 발열판이 지그재그로 반복 형성된 것으로서, 양단이 하우징(10)에 고정 결합되어 하우징(10)의 중앙부에 위치하게 된다.The heater element 30 is a heating plate that generates heat is repeatedly formed in a zigzag, both ends are fixedly coupled to the housing 10 is located in the center of the housing 10.

한편, 히터엘레먼트(30)의 상측부와 하측부에 형성되는 발열판의 굴곡부에는 히터엘레먼트(30)를 지지할 뿐 아니라, 절연 역할을 하는 절연브라켓(20)이 결합된다.On the other hand, the bent portion of the heating plate formed on the upper and lower portions of the heater element 30, as well as supporting the heater element 30, the insulating bracket 20 that serves as an insulation is coupled.

또한, 히터엘레먼트(30)의 양단부에는 하우징(10)에 고정 결합하기 위한 고정볼트(60)가 끼워지는 관통홈(35)이 형성된다.In addition, both ends of the heater element 30 is formed with a through groove 35 is fitted with a fixing bolt 60 for fixing to the housing 10.

따라서, 히터엘레먼트(30)는 먼저, 고정볼트(60)를 하우징(10) 내측에서 외측방향으로 하우징(10)에 관통되게 삽입한 후, 히터엘레먼트(30)의 상측부와 하측부에 결합된 절연브라켓(20)이 하우징(10)에 형성된 결합홈(25)에 삽입되게 끼움과 동시에 양단부에 형성된 관통홈(35)에 고정볼트(60)가 끼워지게 결합한다. Therefore, the heater element 30 is first inserted into the housing 10 through the fixing bolt 60 in the outer direction from the inside of the housing 10, and then coupled to the upper and lower portions of the heater element 30. The insulating bracket 20 is inserted into the coupling groove 25 formed in the housing 10, and at the same time, the fixing bolt 60 is coupled to the through groove 35 formed at both ends thereof.

그리고 상기와 같이 양단부에 형성된 관통홈(35)에 고정볼트(60)가 각각 끼워진 상태에서 하우징(10) 외측으로 돌출되는 고정볼트(60)의 단부에 각각 너 트(65)를 체결하여 고정하면 되는 것이다.When the fixing bolts 60 are fitted into the through grooves 35 formed at both ends as described above, respectively, the nuts 65 are fastened to the ends of the fixing bolts 60 protruding out of the housing 10. Will be.

그러나 히터엘레먼트(30)가 소형인 경우에는 양단부에 관통홈(35)을 가공하는 것이 용이하지 않을 뿐 아니라, 히터엘레먼트(30)의 양단부를 고정볼트(60)에 끼워 하우징(10)에 결합하는 것도 용이하지 않게 된다.However, when the heater element 30 is small, it is not easy to process the through grooves 35 at both ends, and both ends of the heater element 30 are fitted to the fixing bolt 60 to be coupled to the housing 10. Neither will be easy.

따라서, 히터엘레먼트(30)의 결합 및 분해가 용이하지 않아 조립성이 떨어지고, 또한, 유지보수 비용이 많이 들게 되는 문제점이 있게 되는 것이다.Therefore, the assembly and disassembly of the heater element 30 is not easy, and thus the assembly is inferior, and the maintenance cost becomes high.

도 3은 본 발명의 양단에 고정부재(50)가 결합되는 히터엘레먼트(40)의 사시도를 나타낸 것이고, 도 4는 도 3의 본 발명의 히터엘레먼트(40)가 결합된 내연기관용 에어히터(1)의 사시도를 나타낸 것이다.3 is a perspective view of the heater element 40 is coupled to the fixing member 50 at both ends of the present invention, Figure 4 is an air heater 1 for the internal combustion engine coupled to the heater element 40 of the present invention 3 ) Shows a perspective view.

도시된 바와 같이, 히터엘레먼트(40)의 양단에는 하우징(10)에 고정하기 위한 고정볼트(60)가 끼워지는 고정부재(50)가 결합된다.As shown, both ends of the heater element 40 is coupled to the fixing member 50 is fitted with a fixing bolt 60 for fixing to the housing 10.

고정부재(50)는 일단부에 고정볼트(60)가 끼워지는 일측이 개방된 관통홈(55)이 형성되고, 타측부에는 히터엘레먼트(40)의 단부가 끼워질 수 있게 폭방향으로 접어서 형성되는 'U'자 형태의 절곡부(56)가 형성된다.The fixing member 50 is formed with a through groove 55 in which one side into which the fixing bolt 60 is fitted is opened at one end thereof, and the other side portion is formed by folding in the width direction so that the end of the heater element 40 can be fitted. A bent portion 56 having a 'U' shape is formed.

이때, 고정부재(50)에 형성된 관통홈(55)은 측면방향으로 일측이 개방되게 할 수 있을 뿐 아니라, 고정부재(50)의 길이방향으로 개방되게 할 수도 있다.In this case, the through groove 55 formed in the fixing member 50 may not only open one side in the lateral direction, but may also be opened in the longitudinal direction of the fixing member 50.

한편, 고정부재(50)는 고정볼트(60)에 '+'전원단자가 연결되기 때문에 '+' 전원이 히터에렐먼트(40)에 전달되도록 통전역할도 하게 된다.On the other hand, since the '+' power terminal is connected to the fixing bolt 60, the fixing member 50 also serves to conduct electricity so that the '+' power is transmitted to the heater element 40.

관통홈(55)이 형성된 일측부는 관통홈(55)의 가공이 용이하게 히터엘레먼트(40)의 폭보다 크게 형성되며, 이때 관통홈(55)은 일측이 개방되게 형성된다.One side of the through groove 55 is formed to be larger than the width of the heater element 40 to facilitate the processing of the through groove 55, the through groove 55 is formed so that one side is open.

또한, 관통홈(55) 대신에 관통공이 형성될 수도 있다.In addition, a through hole may be formed in place of the through hole 55.

따라서, 폭이 좁은 초소형 히터엘레먼트(40)의 경우에도 히터엘레먼트(40)의 크기와 상관없이 별도의 고정부재(50)에 관통홈(55)을 가공하게 됨으로써, 관통홈(55)을 용이하게 가공 형성할 수 있고, 초소형 히터엘레먼트(40)에 비해 상대적으로 큰 관통홈(55)을 형성할 수 있게 된다.Therefore, even in the case of the ultra-small heater element 40, the through groove 55 is processed in a separate fixing member 50 regardless of the size of the heater element 40, thereby facilitating the through groove 55. It can be formed by processing, it is possible to form a larger through groove 55 than the ultra-compact heater element 40.

고정부재(50)는 'U'자 형태의 절곡부(56)에 히터엘레먼트(40)의 일단부를 끼우고 용접(W)을 함으로써, 히터엘레먼트(40)의 양단에 각각 결합시키게 된다.The fixing member 50 is coupled to both ends of the heater element 40 by inserting one end of the heater element 40 into the bent portion 56 having a 'U' shape and performing welding (W).

또한, 고정부재(50)와 히터엘레먼트(40)의 단부가 용접 결합되는 결합부는 고정부재(50)에 절곡부(56)를 형성하지 않고, 판재형태 자체로 히터엘레먼트의 단부와 용접 결합되게 할 수도 있다.In addition, the coupling portion to which the end of the fixing member 50 and the heater element 40 are welded is to be welded to the end of the heater element in the form of a plate itself without forming the bent portion 56 in the fixing member 50. It may be.

따라서, 히터엘레먼트(40)는 먼저 양단에 고정부재(50)를 각각 용접(W) 결합하고, 하우징(10) 양측의 내측에서 외측방향으로 고정볼트(60)가 관통되게 삽입한 후, 히터엘레먼트(40)의 상측부와 하측부에 결합된 절연브라켓(20)이 하우징(10)에 형성된 결합홈(25)에 삽입되게 끼움과 동시에 하우징(10) 양측에 관통 삽입된 고정볼트(60)가 고정부재(50)에 형성된 관통홈(55)에 끼워지게 결합한다.Therefore, the heater element 40 is first welded to each of the fixing member 50 at both ends (W), and then inserted into the fixing bolt 60 through the inner side of the housing 10 from both sides to the outside, the heater element An insulating bracket 20 coupled to the upper and lower portions of the 40 is inserted into the coupling groove 25 formed in the housing 10 and the fixing bolt 60 penetrated through both sides of the housing 10 is inserted. It is coupled to fit in the through groove 55 formed in the fixing member (50).

그리고 상기와 같이 양단에 결합된 고정부재(50)의 관통홈(55)에 고정볼트(60)가 각각 끼워진 상태에서 하우징(10) 외측으로 돌출되는 고정볼트(60)의 단부에 각각 너트(65)를 체결하여 고정하면 된다.And nuts 65 at the ends of the fixing bolt 60 protruding to the outside of the housing 10 in the state in which the fixing bolt 60 is fitted into the through grooves 55 of the fixing member 50 coupled to both ends as described above. ) Can be fixed by tightening.

이때, 에어히터(1)의 히터엘레먼트(40)에 '+'전원을 공급하는 전원케이블이 고정볼트(60)에 연결됨으로써, 히터엘레먼트(40)에 전원이 공급되게 된다.At this time, the power cable for supplying '+' power to the heater element 40 of the air heater 1 is connected to the fixing bolt 60, the power is supplied to the heater element 40.

상기 고정부재(40)에 관통홈(55) 대신에 관통공을 형성하는 경우에는 절연브라켓(20)이 하우징(10)의 결합홈(25)에 삽입되게 하여 히터엘레먼트(40)를 결합한 후, 고정볼트(60)를 하우징(10) 외측에서 내측방향으로 관통되게 삽입하고, 그 단부에 너트를 체결하여 고정할 수 있다.In the case where the through hole 55 is formed instead of the through hole 55 in the fixing member 40, the insulating bracket 20 is inserted into the coupling groove 25 of the housing 10, thereby coupling the heater element 40. The fixing bolt 60 may be inserted to penetrate inward from the outside of the housing 10, and may be fixed by fastening a nut to an end thereof.

따라서, 상기와 같이 고정볼트(60)가 끼워지는 관통홈(55)을 별도의 고정부재(50)에 가공형성함으로써, 가공이 용이하고, 또한 초소형의 히터엘레먼트(40)의 경우에도 상대적으로 큰 관통홈(55)을 형성할 수 있어 히터엘레먼트(40)를 하우징(10)에 결합하거나 분해하는 것이 용이할 뿐 아니라, 유지보수도 용이하게 되는 것이다.Therefore, by forming the through groove 55 into which the fixing bolt 60 is fitted as described above in a separate fixing member 50, processing is easy, and even in the case of the ultra-small heater element 40, Through grooves 55 may be formed to facilitate coupling or disassembly of the heater element 40 to the housing 10, and also to facilitate maintenance.

이상, 상기의 실시예는 설명의 편의를 위해 예시로서 설명한 것에 불과하므로 특허청구범위를 한정하는 것은 아니다.As mentioned above, since the above embodiments are merely described as examples for convenience of description, the scope of the claims is not limited.

이상에서 설명한 바와 같이, 본 발명은 에어히터에 결합되는 히터엘레먼트 양단에 고정볼트가 끼워질 수 있는 관통홈이 구비된 고정부재를 이용하여 히터엘레먼트를 하우징에 고정시킬 수 있게 함으로써, 히터엘레먼트의 크기와 상관없이 고정볼트가 결합되는 관통홈을 용이하게 가공할 수 있고, 또한, 히터엘레먼트를 하우징에 결합하거나 분해하는 것이 용이할 뿐 아니라, 유지 보수가 용이하여 작업능률 향상에 따른 비용절감의 효과가 있다.As described above, the present invention allows the heater element to be fixed to the housing by using a fixing member having a through groove through which a fixing bolt can be fitted at both ends of the heater element coupled to the air heater, thereby allowing the heater element to be fixed in size. Regardless of whether the fixing bolt is coupled to the through groove can be easily machined, and the heater element can be easily combined or disassembled into the housing, and the maintenance is easy. have.

Claims (2)

내연기관에 흡입되는 공기를 예열하는 내연기관용 에어히터의 히터엘레먼트(40)에 있어서,In the heater element 40 of the air heater for the internal combustion engine for preheating the air sucked into the internal combustion engine, 상기 히터엘레먼트(40)는 양단을 하우징(10)에 고정하기 위한 고정볼트(60)가 결합될 수 있게 일단부에 관통홈(55)이 형성된 고정부재(50)가 양단에 각각 결합되며, 상기 고정부재(50)는 상기 관통홈(55) 일측부에 절곡부(56)를 구비하고, 상기 절곡부(56)에 상기 히터엘레먼트(40)의 단부를 끼워 용접(W) 결합하는 것을 특징으로 하는 에어히터의 히터엘레먼트.The heater element 40 has a fixing member 50 having a through groove 55 at one end thereof is coupled to both ends thereof so that the fixing bolt 60 for fixing both ends to the housing 10 is coupled thereto. The fixing member 50 is provided with a bent portion 56 at one side of the through groove 55, and welds (W) by fitting an end of the heater element 40 to the bent portion 56. Air heater's heater element. 삭제delete
KR1020060078527A 2006-08-21 2006-08-21 Heater element for air heater of internal combustion engine KR100780892B1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02112961U (en) * 1989-02-28 1990-09-10
JPH07145759A (en) * 1993-11-22 1995-06-06 Nippondenso Co Ltd Intake air heating device
JPH07217508A (en) * 1994-01-31 1995-08-15 Ngk Spark Plug Co Ltd Air heater for internal combustion engine
JPH09287529A (en) * 1996-04-18 1997-11-04 Ngk Spark Plug Co Ltd Air heater for internal combustion engine
KR200378523Y1 (en) 2004-12-15 2005-03-11 우진공업주식회사 Air heater for internal-combustion engines
JP2006183463A (en) 2004-12-24 2006-07-13 Ngk Spark Plug Co Ltd Air heater for internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02112961U (en) * 1989-02-28 1990-09-10
JPH07145759A (en) * 1993-11-22 1995-06-06 Nippondenso Co Ltd Intake air heating device
JPH07217508A (en) * 1994-01-31 1995-08-15 Ngk Spark Plug Co Ltd Air heater for internal combustion engine
JPH09287529A (en) * 1996-04-18 1997-11-04 Ngk Spark Plug Co Ltd Air heater for internal combustion engine
KR200378523Y1 (en) 2004-12-15 2005-03-11 우진공업주식회사 Air heater for internal-combustion engines
JP2006183463A (en) 2004-12-24 2006-07-13 Ngk Spark Plug Co Ltd Air heater for internal combustion engine

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