A resistance element includes a resistance coil having a first end and a second end opposite the first end. The resistance coil defines a plurality of first portions defining a first constant diameter and a plurality of second portions defining a second constant diameter smaller than the first diameter. At least one of the first portions and the second portions has a continuously variable pitch. The resistance coil may also further define two third portions, each third portion being disposed adjacent to a corresponding first or second end. The resistance element may be disposed between first and second conducting pins in a heater.

A heater includes a first conducting pin, a second conducting pin, and a plurality of resistance coils. Each resistance coil includes a first end connected to the first conducting pin and a second end connected to the second conducting pin. At least one resistance coil among the plurality of resistance coils has a continuously variable pitch. In one form, the plurality of resistance coils are connected in a parallel circuit with the first and second conducting pin. A first resistance coil among the plurality of resistance coils may have a diameter that is different than a second resistance coil among the plurality of resistance coils.

A heater includes a first conducting pin, a second conducting pin, and a plurality of resistance coils. Each resistance coil includes a first end connected to the first conducting pin and a second end connected to the second conducting pin. At least one resistance coil among the plurality of resistance coils has a continuously variable pitch. In one form, the plurality of resistance coils are connected in a parallel circuit with the first and second conducting pin. A first resistance coil among the plurality of resistance coils may have a diameter that is different than a second resistance coil among the plurality of resistance coils.

The present disclosure relates to a method for manufacturing a de-powder device for piping and a method for installing the same, and more particularly, to a method for manufacturing a de-powder device for piping, which is for suppressing attachment and deposition of exhaust matters to an inner circumferential surface of a pipe exposed to the flow of exhaust matters such as unreacted raw material gas, reaction products, and the like exhausted from substrate processing devices for semiconductors and displays, and a method for installing the same. The method for manufacturing a de-powder device for piping according to the present disclosure includes: a heater manufacturing step (S1) including a step (S11) of manufacturing an intermediate product by installing a heating wire connected to a power source inside a metal pipe and filling it with an insulating agent and a step (S12) of cutting the intermediate product and connecting one end portions of exposed heating wires; a winding step (S2) of manufacturing a heating coil which has a predetermined outer diameter by winding the heater around a jig and at least a portion of which is inserted into a pipe; and a coupling step (S3) of coupling the flange and the heating coil by inserting an end portion of the heating coil into an exposed hole formed in a metal flange.

A household appliance includes: a treatment chamber for receiving goods to be treated, the treatment chamber having a bottom for collecting condensed water from a treatment process, the bottom of the treatment chamber having, on its side facing away from the treatment chamber, at least one flat heating element which heats the bottom of the treatment chamber in at least some regions by at least one electrical heating element, and evaporates the condensed water collected there into the treatment chamber. The electrical heating element includes a heating layer. The at least one flat heating element includes an electrical measuring element including a measuring layer.

A household appliance includes: a treatment chamber for receiving goods to be treated, the treatment chamber having a bottom for collecting condensed water from a treatment process, the bottom of the treatment chamber having, on its side facing away from the treatment chamber, at least one flat heating element which heats the bottom of the treatment chamber in at least some regions by at least one electrical heating element, and evaporates the condensed water collected there into the treatment chamber. The electrical heating element includes a heating layer. The at least one flat heating element includes an electrical measuring element including a measuring layer.

A heat transfer assembly includes a sheath which in one embodiment is elliptical in cross-section and in another embodiment has a complex cross-section with flat wall sections and curved wall sections. The sheath is elastically deformable so as to accept a heat transfer element sub-assembly. Once installed, the sheath holds the sub-assembly in place by an interference fit.

An electrical device (100, 200) is provided with a tubular metal sheath (110, 210, 250, 260) and with an insulator body (120, 160, 220, 251, 261), which is arranged in the interior of the tubular metal sheath (110, 210, 250, 260) and through which passes at least one tunnel-like opening (tunnel opening) (121, 122, 161, 162, 221, 252, 262). At least one section (131a, 132a, 171a, 172a) of a first electrical conductor (131, 132, 171, 172, 231) is arranged in the tunnel opening (121, 122, 161, 162, 221, 252, 262), in which the cross-sectional geometry of the tunnel opening (121, 122, 161, 162, 221, 252, 262) deviates from a circular shape.

An electrical device (100, 200) is provided with a tubular metal sheath (110, 210, 250, 260) and with an insulator body (120, 160, 220, 251, 261), which is arranged in the interior of the tubular metal sheath (110, 210, 250, 260) and through which passes at least one tunnel-like opening (tunnel opening) (121, 122, 161, 162, 221, 252, 262). At least one section (131a, 132a, 171a, 172a) of a first electrical conductor (131, 132, 171, 172, 231) is arranged in the tunnel opening (121, 122, 161, 162, 221, 252, 262), in which the cross-sectional geometry of the tunnel opening (121, 122, 161, 162, 221, 252, 262) deviates from a circular shape.

An electric heater (100, 200, 300, 400, 500, 600) includes a metal sheath (101, 201, 301, 401, 501, 601) defining an interior space, an electric heating element, arranged in the interior space, an insulating material filling and electric terminals. At least one electric terminal is a plug contact (108, 109, 208, 209, 308, 309, 408, 409, 508, 509, 608, 609) made in one piece, which has a section (108b, 109b, 208b, 209b, 308b, 309b, 508b, 509b, 608a, 609b) arranged in the interior space with a contact point (110, 111, 210, 211, 310, 311), which is arranged in the interior space and at which the plug contact is connected conductively to the electric heating element directly or via an auxiliary wire (212, 213, 312, 313, 612, 613). A process for manufacturing such an electric heater is provided.