Jacket heater, method for manufacturing jacket heater, and heating unit

A jacket heater that is to be attached to a heated object for use, comprising:

• an inner layer being in contact with the heated object;
• an outer layer;
• a heat generation layer and a thermal insulation layer provided between the inner layer and the outer layer;
• and
• a temperature sensor including a temperature detection point positioned between the inner layer and the heat generation layer and a cable part extending from the temperature detection point, wherein
• the cable part penetrates the heat generation layer, the thermal insulation layer, and the outer layer, starting with a space between the inner layer and the heat generation layer toward the outer layer, while a section from a derivation part derived from one layer of adjacently-positioned layers to an introduction part introduced to the other layer of the adjacently-positioned layers is positioned on a path bypassing a linear path connecting the derivation part to the introduction part, in a space between the adjacently-positioned layers including at least one of the heat generation layer, the thermal insulation layer, and the outer layer.

A heating unit that covers a pipe and heats an inside of the pipe, comprising:

• an inner layer being in contact with a heated object;
• an outer layer;
• a heat generation layer and a thermal insulation layer provided between the inner layer and the outer layer;
• and
• a temperature sensor including a temperature detection point exposed to an inner surface of the inner layer being in contact with the heated object and a cable part extending from the temperature detection point, wherein
• the cable part penetrates the inner layer, the heat generation layer, the thermal insulation layer, and the outer layer, starting with the inner layer toward the outer layer, while a section from a derivation part derived from one layer of adjacently-positioned layers to an introduction part introduced to the other layer of the adjacently-positioned layers is positioned on a path bypassing a linear path connecting the derivation part to the introduction part, in a space between the adjacently-positioned layers including at least one of the inner layer, the heat generation layer, the thermal insulation layer, and the outer layer.

A heating unit that covers a pipe and heats an inside of the pipe, comprising:

• an inner layer being in contact with a heated object;
• an outer layer;
• a heat generation layer and a thermal insulation layer provided between the inner layer and the outer layer;
• and
• a temperature sensor including a temperature detection point positioned between the inner layer and the heat generation layer and a cable part extending from the temperature detection point, wherein
• the cable part penetrates the heat generation layer, the thermal insulation layer, and the outer layer, starting with a space between the inner layer and the heat generation layer toward the outer layer, while a section from a derivation part derived from one layer of adjacently-positioned layers to an introduction part introduced to the other layer of the adjacently-positioned layers is positioned on a path bypassing a linear path connecting the derivation part to the introduction part, in a space between the adjacently-positioned layers including at least one of the heat generation layer, the thermal insulation layer, and the outer layer