METRO DENKI KOGYO CO., LTD.
Reduction of running cost and increase of burning temperature by high efficiency carbon heater
- Technical Classification:
- [ Intermediate Products ]
- Products:
- [ Equipment / Facilities ]
- Keyword:
- [ clean ] [ energy saving ] [ high efficiency ] [ high-output ] [ infrared heating ]
Point of the Proposed Technology
(i) Mid infrared radiation wavelength from a heating element having emissivity of 85%
(ii) Maximum filament temperature of about 1,300°C
(iii) Flexibility in design and small lot available
(iv) High W density (300 kW/m2)
(ii) Maximum filament temperature of about 1,300°C
(iii) Flexibility in design and small lot available
(iv) High W density (300 kW/m2)
Effect(s)
(i) Increase of radiant quantity by 30%
(ii) Half the heating time compared with gas heating
* Depending on the conditions
(ii) Half the heating time compared with gas heating
* Depending on the conditions
Conventional Technology
Development of high-output carbon heater using high purity C.C material as heating element:
・Far infrared heaters such as sheathed heater are mainstream in heating. Due to their structure, however, it is difficult to design them for high temperature of over 800°C, and the temperature response is poor. Also, they are large in size and heavy.
・Other carbon heaters have no flexibility in design and have difficulty in production in a small lot. The maximum filament temperature or the emissivity is low.
・The maximum W density of the conventional heat sources is about 150 kW/m2. Therefore, the output was insufficient, and they couldn't be used in the fields, such as heating of metal mold, in which high temperature must be reached in a short time.
・IH has high-power output but expensive, and its applications are limited.
・Far infrared heaters such as sheathed heater are mainstream in heating. Due to their structure, however, it is difficult to design them for high temperature of over 800°C, and the temperature response is poor. Also, they are large in size and heavy.
・Other carbon heaters have no flexibility in design and have difficulty in production in a small lot. The maximum filament temperature or the emissivity is low.
・The maximum W density of the conventional heat sources is about 150 kW/m2. Therefore, the output was insufficient, and they couldn't be used in the fields, such as heating of metal mold, in which high temperature must be reached in a short time.
・IH has high-power output but expensive, and its applications are limited.
New Technology
Development of high-output carbon heater using high purity C.C material as heating element:
・Resistance adjustment by slit processing increases flexibility in design and enables production in a small lot.
・Use of a high-purity C.C material as a heating element realizes a high emissivity of 85% and the maximum filament temperature of 1,300ºC or higher.
・High-purity heating element has a long life even at the W density of 300 kW/m2 or higher.
・In the fields, such as heating of metal mold, where only gas was used so far, this carbon heater enables a rise in temperature.
・Applicable to heating new raw materials such as CFRP.
・Bending shapes can be produced.
・Resistance adjustment by slit processing increases flexibility in design and enables production in a small lot.
・Use of a high-purity C.C material as a heating element realizes a high emissivity of 85% and the maximum filament temperature of 1,300ºC or higher.
・High-purity heating element has a long life even at the W density of 300 kW/m2 or higher.
・In the fields, such as heating of metal mold, where only gas was used so far, this carbon heater enables a rise in temperature.
・Applicable to heating new raw materials such as CFRP.
・Bending shapes can be produced.
Technology Deployment and Cooperation
| Development Stage |
Commercialization Completed (already delivered: yes) |
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|---|---|---|---|---|---|
| Intellectual Property Right | Yes | ||||
| Joint Researchers (their role) | |||||
| Example of Application | ・Polymeric materials, drying of painting, chemical agents, silicon wafer, food processing, heater, and so on
・Heating of metal mold | ||||
| Technical Problems | ・Since it is a lamp heater, its applications are limited to ones where no shock is applied to avoid damage to the quartz tube used for the outer tube.
・Since the heat-resistant temperature at the end of the lamp heater is 300°C, it may become necessary to take it out of furnace or to be subjected to forced cooling. | ||||
| Collaborator needed to Improve | |||||
| Technical WEB page | http://www.metro-co.com/product/industrial/index.html | ||||
Inquiries
| Personnel / Department | Technical Department / Manager, Seiji Kurata | ||||
|---|---|---|---|---|---|
| Address | 11-1 Terada, Yokoyama-cho, Anjo-shi, Aichi, 446-0045 Japan | ||||
| Contact |
TEL: +81-566-75-8811 |
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Outline of Company and Organization
| Location | 11-1 Terada, Yokoyama-cho, Anjo-shi, Aichi, 446-0045 Japan | ||||
|---|---|---|---|---|---|
| Capital / No. of Employees | 60,000,000 yen・92 employees | ||||
| Product Line | Heater unit for kotatsu /various heater tubes/various electric bulbs | ||||
| Major Customers | Automobile makers, food processing equipment makers, heating equipment makers, etc. | ||||
| Overseas Base(s) | Contracted factories (China, Malaysia) | ||||
| Certification | ISO14001 | ||||
| Company/Organization WEB page | http://www.metro-co.com/index.html | ||||
Update date: 2020/2/18