COMPOSITE-TYPE TEMPERATURE RAISING AND CONTROL INTEGRATED HEATING ELEMENT AND TEMPERATURE CONTROL METHOD

Abstract

A composite-type temperature raising and control integrated heating element and a temperature control method are provided. 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 heating body of the temperature raising and control integrated heating element 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 the 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, and the performance of the heating element is improved.

Claims

1. A composite-type temperature raising and control integrated heating element, comprising a heating body, wherein the heating body is integrated by welding two different conductive materials at a welding point ; and the heating element is not provided with a temperature measuring element other than the heating body.

2. The composite-type temperature raising and control integrated heating element according to claim 1, wherein the two different conductive materials comprise two different metals or two different alloys, or one of the two different conductive materials is a metal and the other of the two different conductive materials is an alloy.

3. The composite-type temperature raising and control integrated heating element according to claim 1, wherein a shape of the heat element comprises a sheet structure, a rod structure, or a cup structure; and the heating body is provided on a hollow interior or an outer wall of the sheet structure, the rod structure, or the cup structure.

4. The composite-type temperature raising and control integrated heating element according to claim 1, further comprising a shell; wherein the shell is provided with a hollow cavity; the heating body is provided within the hollow cavity of the shell; and two heating circuit pins protruding out of the shell are provided at ends of the heating body.

5. The composite-type temperature raising and control integrated heating element according to claim 1, wherein a structure of the heating body comprises a spiral winding structure, or a segmented spiral winding structure, or a broken line structure.

6. The composite-type temperature raising and control integrated heating element according to claim 1, wherein the two different conductive materials of the heating body comprise one of the following three combinations: a platinum-rhodium alloy and a platinum metal, a nickel-chromium alloy and a nickel-silicon alloy, and a nickel-chromium-silicon alloy and the nickel-silicon alloy.

7. The composite-type temperature raising and control integrated heating element according to claim 4, wherein an inner wall of the hollow cavity of the shell is provided with an insulating layer.

8. The composite-type temperature raising and control integrated heating element according to claim 4, wherein a material of the shell is selected from a ceramic, a metal, a metal oxide, or an alloy material.

9. A temperature control method of a composite-type temperature raising and control integrated heating element, wherein the composite-type temperature raising and control integrated heating element according to claim 1 is electrically connected to an anode and a cathode of a circuit control device by two heating circuit pins of the composite-type temperature raising and control integrated heating element; and the temperature control method comprises the following steps: step A: adjusting the circuit control device to supply the composite-type temperature raising and control integrated heating element with a first voltage V.sub.0 ; wherein at this time, a current passes through the heating body, and the heating body heats up as a heating body to achieve temperature control; and step B: adjusting the circuit control device to stop supplying the voltage for the composite-type temperature raising and control integrated heating element; wherein at this time, the heating body serves as a thermocouple temperature measuring sensor to detect a temperature of the composite-type temperature raising and control integrated heating element to achieve temperature detection.

10. The temperature control method according to claim 9, wherein 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.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a schematic diagram of a composite-type temperature raising and control integrated heating element in Embodiment I.

[0029] FIG. 2 is a temperature control and detection signal waveform diagram of composite-type temperature raising and control integrated heating element in Embodiment II.

NUMERALS SYMBOLS IN THE FIGURES

[0030] 1-heating element, 2-shell, 3-welding point, 4-heating body, 5-base, and 6-heating circuit pin.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present invention is further described in conjunction with the following embodiments.

Embodiment I

[0032] As shown in FIG. 1, the composite-type temperature raising and control integrated heating element 1 includes a shell 2, a welding point 3, a heating body 4, and a base 5. The heating element 1 is not provided with a temperature measuring element other than the heating body 4.

[0033] 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.

Embodiment II

[0034] 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.

[0035] As shown in FIG. 2, during temperature control (in the state where the voltage is equal to the battery voltage), the temperature of the heating element 4 is controlled by adjusting the supplied voltage to the heating body 4 through a pulse-width modulation (PWM) regulation electronic switch. During temperature detection (in the state where the voltage is 0), the heating body 4 tests the temperature of the heating element in time t.sub.0.

[0036] 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.