PTC heater for use in liquid with close electrical and thermal c

Details PTC heater for use in liquid with close electrical and thermal c PTC heater for use in liquid with close electrical and thermal c

1994-08-05

1997-01-28

Jeffery, John A.

Electric resistance heating devices

Heating devices

Immersion heater details

219505, 219541, 219544, 219523, 219537, H05B 314

Patent

active

055985025

ABSTRACT:
A heater for heating a liquid in which the electrical contact between a PTC thermistor and electrode plates is surely realized, and the thermal coupling and the thermal efficiency are excellent. In a case 1, an internal space 13 has an opening 14 at one side portion, and the whole of the periphery of the case is closed except the opening 14. A pair of electrode plates 21 and 22 have projections 211 and 221 on faces 212 and 222, and are housed in the internal space 13 of the case 1 in such a manner that their other faces 223 are opposed to heat radiating faces 11 and 12. The PTC thermistors are disposed between the electrode plates 21 and 22 in such a manner that projections 211 and 221 are contacted with the electrodes 32 and 33, respectively. Thermal conductive fillers 41 and 42 made of a resin are charged between the electrodes 32 and 33 of the PTC thermistors 3 and the electrode plates 21 and 22 so as to fill the gaps which are formed by the projections 211 and 221.

REFERENCES:
patent: 3996447 (1976-12-01), Bouffard et al.
patent: 4242567 (1980-12-01), Carter
patent: 4401885 (1983-08-01), Ishii et al.
patent: 4426573 (1984-01-01), Fudickar et al.
patent: 4482801 (1984-11-01), Habata et al.
patent: 4689878 (1987-09-01), Beauregard et al.
patent: 4814584 (1989-03-01), Bohlender et al.
patent: 4822980 (1989-04-01), Carbone et al.
patent: 5125070 (1992-06-01), Chung-Tai
patent: 5354969 (1994-10-01), Akiyama et al.

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