US2004134480A1PendingUtilityA1
Convective system
Est. expiryJan 7, 2023(expired)· nominal 20-yr term from priority
F24H 3/0405
33
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Claims
Abstract
We have discovered a simple electrical assembly of heating coils which may be arranged to produce hot air or gas up to 1500° C. This assembly is the invention claimed in this patent.
Claims
exact text as granted — not AI-modifiedWe claim:
1 . A novel gas heater product, with a coil in coil heater assembly, and annular space for the gas where the inner and outer coils are connected electrically and the gas flow rate varies from 1 cfm to about 1000 cfm.
2 . A novel gas heater product, with a coil in coil heater assembly, and annular space for the gas where the inner and outer coils are connected electrically and the wires in the inner and outer coil are wound in an opposing manner and the gas flow rate varies from 1 cfm to about 100 cfm.
3 . The product of claim 1 or claim 2 where the gap between the coils is ranges from about 5 mm to about 14 mm.
4 . The product of claim 1 or claim 2 wherein the ratio of the gap to the winding spacing ranges from about 4.5 mm to about 0.5 mm.
5 . The product of claim 1 wherein the coils are wound in the same direction.
6 . A product of claim 1 where the inner and outer diameter coil wires may be varied from about 0.1 mm to about 6 mm
7 . A product of claim 2 where the inner and outer diameter coil wires may be varied from about 0.1 mm to about 6 mm
8 . The product of claim 1 where the cross sectional area for air flow is about 15 to about 150 square mm
9 . The product of claim 2 where the cross sectional area for air flow is about 15 to about 150 square mm.
10 . The product of claim 1 where multiple coil and configurations are used in one housing.
11 . The product of claim 2 where multiple coil and configurations are used in one housing.
TABLE 2
Typical Results of the UltraAirtorch ™
UAT5 Ref: p83 (4) HIPAN Primary: 208 Volts,
Secondary: 40 Volts tap. Jun. 28, 2002
Temperature, C.
Flow,
Secondary
Primary
Time
Set point
Process
SCFM
Current
Volts
Current
Volts
Comments
10:00
0
RT
2.0
0
0
0
0
Started
10:03
1400
542
2.0
93
14
16
10:05
1400
1167
2.0
103
21
18
10:07
1400
1371
2.0
95
21
18
10:08
1400
1400
2.0
106
18
15
10:20
1400
1402
2.0
105
18
18
10:30
1400
1400
2.0
79
16
14
10:38
1400
1400
2.0
77
16
13
10:38:50
1400
1400
3.0
86
18
14
10:48
1400
1400
3.0
86
17
14
10:58
1400
1400
3.0
81
16
14
11:08
1400
1400
3.0
81
16
15
11:08:50
1400
1400
4.0
89
18
16
81
11:20
1400
1400
4.0
96
19
17
End
TABLE 3
Typical Results of the UltraAirtorch ™
UAT5 Ref: p95 (4) HIPAN Primary: 240 Volts,
Secondary: 40 Volts tap. Jul. 30, 2002
Temperature, C.
Flow,
Secondary
Primary
Time
Set point
Process
In-situ
SCFM
Current
Volts
Current
Volts
Comments
9:35
0
RT
RT
3.0
0
0
0
0
Started
9:39
1050
1046
621
3.0
89
13
15
9:42
1372
1334
942
3.0
102
19.6
18
9:43
1372
1372
1032
3.0
95
18.5
17
9:47
1372
1372
1055
3.0
123
22
19
End
10:47
1400
392
432
3.0
0
0
0
0
Restarted
10:49
1400
1042
702
3.0
124
19.7
22
10:50
1400
1375
954
3.0
98
18.8
17
10:51
1400
1397
1022
3.0
95
16
10:52
1400
1400
1074
3.0
89
17
16
11:00
1400
1400
1165
3.0
81
15
11:10
1500
1500
1279
1.0
70
12
11:13
1500
1500
1301
1.0
67
14
12
81
11:18
1500
1500
1314
1.0
66
12
12
11:26
1500
1500
1316
0.5
56
11
10
11:28
1500
1500
1315
1.0
60
12
10
11:39
1500
1500
1316
1.0
58
11
10
88
11:53
1500
1500
1322
1.0
57
11
10
69
12:05
1500
1500
1322
1.0
56
11
10
69
12:55
1500
1500
1324
1.0
55
11
10
1:31
1500
1500
1324
1.0
55
11
10
2:05
1500
1500
1328
1.0
55
11
10
3:30
1500
1500
1332
1.0
55
11
10
5:00
1500
1500
1332
1.0
55
11
10
70
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