Heater and cigarette device with heater
A heater includes a base body, a conductive module, and an infrared electrothermal coating. The conductive module includes a first electrode and a second electrode spaced on the base body. The first electrode includes a first bar electrode axially extending from a first end to a second end, the second electrode includes a second bar electrode axially extending from the first end to the second end, and at least a part of the infrared electrothermal coating is located between the first bar electrode and the second bar electrode. An equivalent resistance of a part of the infrared electrothermal coating adjacent to the first end is less than an equivalent resistance of a middle part of the infrared electrothermal coating. An equivalent resistance of a part of the infrared electrothermal coating adjacent to the second end is less than the equivalent resistance of the middle part of the infrared electrothermal coating.
1 . A heater, comprising:
a base body, having a surface;
an infrared electrothermal coating, having a first end and a second end opposite to each other, wherein the infrared electrothermal coating is formed on the surface of the base body and axially extends from the first end to the second end; and
a conductive module, including a first electrode and a second electrode spaced on the base body, wherein the first electrode includes a first bar electrode extending from the first end to the second end, the second electrode includes a second bar electrode extending from the first end to the second end, and at least a part of the infrared electrothermal coating is located between the first bar electrode and the second bar electrode; wherein
an equivalent resistance of a part of the infrared electrothermal coating adjacent to the first end is less than an equivalent resistance of a middle part of the infrared electrothermal coating; and/or an equivalent resistance of a part of the infrared electrothermal coating adjacent to the second end is less than an equivalent resistance of the middle part of the infrared electrothermal coating.
2 . The heater according to claim 1 , wherein a circumferential distance between a part of the first bar electrode adjacent to the first end and the second bar electrode is less than a circumferential distance between a middle part of the first bar electrode and the second bar electrode; and
a circumferential distance between a part of the first bar electrode adjacent to the second end and the second bar electrode is less than a circumferential distance between a middle part of the first bar electrode and the second bar electrode.
3 . The heater according to claim 2 , wherein the first electrode further includes at least one first arc electrode extending from the first bar electrode along a circumferential direction of the base body;
the second electrode further includes at least one second arc electrode extending from the second bar electrode along the circumferential direction of the base body; and
the first arc electrode and the second arc electrode are both adjacent to the first end or the second end.
4 . The heater according to claim 3 , wherein the first arc electrode is adjacent to the first end, and the second arc electrode is adjacent to the second end.
5 . The heater according to claim 4 , wherein the first arc electrode extends equidistantly from the first bar electrode along two opposite circumferential directions of the base body, and the second arc electrode extends equidistantly from the second bar electrode along two opposite circumferential directions of the base body.
6 . The heater according to claim 5 , wherein a circumferential length of the first arc electrode and a circumferential length of the second arc electrode both range from 20% to 30%, preferably 25%, of a circumferential length of the base body.
7 . The heater according to claim 2 , wherein an equivalent resistance of the infrared electrothermal coating gradually increases along a direction from the first end to the middle part of the infrared electrothermal coating; and
the equivalent resistance of the infrared electrothermal coating gradually increases along a direction from the second end to the middle part of the infrared electrothermal coating.
8 . The heater according to claim 7 , wherein a circumferential distance between the first bar electrode and the second bar electrode gradually increases along the direction from the first end to the middle part of the infrared electrothermal coating; and
the circumferential distance between the first bar electrode and the second bar electrode gradually increases along the direction from the second end to the middle part of the infrared electrothermal coating.
9 . The heater according to claim 8 , wherein a circumferential length of the second bar electrode gradually decreases along the direction from the first end to the middle part of the infrared electrothermal coating; and
a circumferential length of the first bar electrode gradually decreases along the direction from the second end to the middle part of the infrared electrothermal coating.
10 . The heater according to claim 1 , wherein the first electrode further includes a first annular electrode electrically connected to the first bar electrode, and the first annular electrode is arranged between the second end and an end portion of the base body; and
the second electrode further includes a second annular electrode electrically connected to the second bar electrode, and the second annular electrode is arranged between the first end and an other end portion of the base body.
11 . The heater according to claim 10 , wherein none of the first annular electrode and the second annular electrode is in contact with the infrared electrothermal coating.
12 . The heater according to claim 1 , wherein resistivities of the part of the infrared electrothermal coating adjacent to the first end and the part of the infrared electrothermal coating adjacent to the second end are both less than a resistivity of the middle part of the infrared electrothermal coating; or,
film thicknesses of the part of infrared electrothermal coating adjacent to the first end and the part of infrared electrothermal coating adjacent to the second end are both greater than a film thickness of the middle part of the infrared electrothermal coating.
13 . A cigarette device, including a housing assembly and the heater according to claim 1 , wherein the heater is arranged in the housing assembly.