Patent Application
20230046048
The present invention belongs to the technical field of a heating element of new smoking implement and, especially relates to a composite-type temperature raising and control integrated heating element and a temperature control method.
In the prior art, a heating element of a smoking implement for heat-not-burn tobacco rolls realizes heating and temperature measuring by providing a heating wire and a thermocouple on the heating element’s main body. The heating element is prone to short-circuit because the heating wire and the thermocouple are arranged closely. Moreover, the process of producing the heating element is complicated. Additionally, a heating circuit and a temperature measuring circuit are designed separately, leading to an overall complex circuit.
In order to solve the above-mentioned problem, the present invention is provided.
In the first aspect, the present invention provides a composite-type temperature raising and control integrated heating element. The heating element includes a heating body, which is integrated by welding two different conductive materials at a welding point. The heating element is not provided with a temperature measuring element other than the heating body.
The two metal or alloy materials after being welded are configured to heat up under energized conditions, and serve as a thermocouple temperature measuring sensor for temperature measuring when not under energized conditions.
The position of the welding point can be selected according to the temperature field distribution of the heating element. Usually, the position of the welding point is the high-temperature position of the entire heating element.
Preferably, the two different conductive materials include two different metals or two different alloys, or one of the two materials is a metal and the other is an alloy.
Preferably, the shape of the heat element includes a sheet structure, a rod structure, or a cup structure, and the heating body is provided on the hollow interior or the outer wall of the sheet structure, the rod structure, or the cup structure.
Preferably, the heating element further includes a shell.
The shell is provided with a hollow cavity.
The heating body is provided within the hollow cavity of the shell.
Two heating circuit pins protruding out of the shell are provided at ends of the heating body.
Preferably, the structure of the heating body includes a spiral winding structure, a segmented spiral winding structure, or a broken line structure.
Preferably, the two different conductive materials of the heating body include one of the following three combinations: a platinum-rhodium alloy and a platinum, a nickel-chromium alloy and a nickel-silicon alloy, and a nickel-chromium-silicon alloy and the nickel-silicon alloy.
Preferably, the inner wall of the hollow cavity of the shell is provided with an insulating layer.
Preferably, the material of the shell is selected from a ceramic, a metal, a metal oxide, or an alloy material.
The shape of the shell is a hollow cylinder shape with a tip, or a sword shape.
Preferably, the shell may be formed by pressing multiple pieces together, or may be formed integrally.
Preferably, the heating element further includes a base, and the base is arranged at the bottom part of the heating element. The base is configured to immobilize and protect the heating body.
In the second aspect, the present invention provides a temperature control method of the composite-type temperature raising and control integrated heating element. The heating element in the first aspect is electrically connected to the anode and the cathode of a circuit control device by the two heating circuit pins of the heating element. The temperature control method includes the following steps:
Preferably, a process of the temperature control and the temperature detection is periodically achieved through the circuit control device by periodically adjusting the voltage supplied to the heating body in a predetermined time.
The above-mentioned technical solutions can be freely combined under the precondition that the combination does not contradict.
The present invention has the following advantages.
The present invention provides designs for a temperature raising and control integrated heating element inventively, and a new method for temperature control of a heating element for the heat-not-burn tobacco rolls. The heating body is formed by welding two conductive materials. When a high voltage is applied, the two conductive materials serve as the heating body to generate heat. When supply of the voltage is stopped, the two conductive materials serve as a thermocouple temperature measuring sensor to measure the temperature of the heating element. Compared to existing heating elements, the temperature measuring sensor is omitted, the fabrication process of the heating element is simplified, the performance of the heating element is improved, the roasting effect of tobacco rolls is improved, the production costs are reduced, and a better user experience is brought to consumers.
1-heating element, 2-shell, 3-welding point, 4-heating body, 5-base, and 6-heating circuit pin.
The present invention is further described in conjunction with the following embodiments.
As shown in
The heating element 1 is in a rod shape with a tip. The shell 2 is formed by pressing two metal sheets together. The borders of the two sheets are pressed to be sealed, and a cavity is formed in the center. The heating body 4 is arranged in the cavity. The heating body 4 is integrated by welding two different alloy materials of nickel-chromium alloy and nickel-silicon alloy at the welding point 3. The heating body 4 has a threadlike structure in the form of a spiral winding, and two heating circuit pins 6 protruding out of the shell 2 and the base 5 are provided at the ends of the heating body 4. The base 5 is provided at the bottom of the heating element 1.
In a temperature measuring method for the composite-type temperature raising and control integrated heating element, the heating element 1 described in Embodiment I is electrically connected to the anode and the cathode of a circuit control device by the two heating circuit pins 6 of the heating element 1. The temperature control method includes the following steps.
As shown in
The above-mentioned embodiments are only specific implementations of the present invention, but the scope of protection of the present invention is not limited to these embodiments. Any variation or replacement that can be easily thought of by any person skilled in the art within the technical scope disclosed by the present invention shall be covered in the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202010054217.6 | Jan 2020 | CN | national |
This application is the national phase entry of International Application No. PCT/CN2021/072120, filed on Jan. 15, 2021, which is based upon and claims priority to Chinese Patent Application No. 202010054217.6, filed on Jan. 17, 2020, the entire contents of which are incorporated herein by reference.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2021/072120 | 1/15/2021 | WO |
