Heating and temperature detection integrated heating sheet and heating control system

Abstract

The utility model relates to the technical field of incense or fragrance tasting, in particular to a heating and temperature detection integrated heating sheet and a heating control system, the heating sheet comprises a heating substrate, a first electric conductor and a second electric conductor are coiled on the surface of the heating substrate, the first electric conductor and the second electric conductor are made of different materials, and the first electric conductor and the second electric conductor are made of different materials. One end of the first conductor is electrically connected in series with one end of the second conductor; the first electric conductor and the second electric conductor jointly form a heating wire. The first electric conductor and the second electric conductor which are made of different materials are arranged on the heating substrate to form the heating wire, so that the heating wire and the heating substrate are integrated, the heating wire can be used for heating when the heating wire is powered on, and temperature detection can be carried out through the heating wire when the heating wire is powered off, so that the temperature detection is more accurate, and the temperature control is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of incense fumigation or incense tasting, in particular to a heating sheet integrating heating and temperature detection and a heating control system. Background Art

[0002] Existing incense diffusers or incense tasting devices all need to use a heating element, which is powered on to generate heat, thereby heating the fragrance to achieve the effect of fumigating or tasting fragrance. Different fragrances have different heating temperatures, so it is necessary to control the heating temperature of the heating element to meet the heating temperature requirements of the corresponding fragrance.

[0003] The heating element of the existing incense burner or incense tasting device generally detects the temperature of the heating plate through a temperature probe, and controls the temperature by cutting off the power supply to the heating plate when the predetermined temperature is reached.

[0004] However, due to the different placement positions of the temperature probes, the temperature detection error of the temperature probes will be relatively large, resulting in relatively low temperature control accuracy of the heating element. Summary of the invention

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a heating sheet and a heating control system that integrates heating and temperature detection, so that the heating wire and the heating substrate are integrated, so that heating can be performed when the heating wire is powered on, and temperature detection can be performed through the heating wire when the power is off, thereby making temperature detection more accurate and temperature control more precise.

[0006] To achieve the above purpose, the specific scheme of the utility model is as follows:

[0007] The first aspect of the utility model provides a heating sheet that integrates heat generation and temperature detection, including a heating substrate, a first conductor and a second conductor are coiled on the surface of the heating substrate, the material of the first conductor is different from the material of the second conductor, one end of the first conductor is electrically connected in series with one end of the second conductor; the first conductor and the second conductor together constitute a heating wire.

[0008] In the present invention, the first conductor is made of nickel-chromium material, and the second conductor is made of nickel-silicon material.

[0009] In the present invention, one end of the first conductor is fixedly welded to one end of the second conductor.

[0010] In the present invention, the first conductor and the second conductor are respectively wound in a spiral shape on the heating substrate with the welding point as the center.

[0011] In the present invention, the first conductor and the second conductor are respectively wound on the heating substrate in a reciprocating bending structure with the welding point as the starting point.

[0012] Furthermore, in the utility model, the heating substrate is made of ceramic material.

[0013] The second aspect of the utility model provides a heating control system, including a power supply, a control unit, a power switch device, a voltage amplification circuit module, an ADC analog-to-digital conversion module and the heating sheet as described above;

[0014] The control end of the power switch device is connected to the control unit, and the control unit outputs a PWM signal to the control end of the power switch device; the switch end of the power switch device is connected in series with the heating plate and then connected to the power supply, the detection end of the voltage amplifier circuit module is connected to the heating plate, the output end of the voltage amplifier circuit module is connected to the detection end of the ADC analog-to-digital conversion module, and the output end of the ADC analog-to-digital conversion module is connected to the control unit.

[0015] In the utility model, the power switch device is a MOS tube or a thyristor.

[0016] The beneficial effects of the utility model are as follows: the utility model forms a heating wire by arranging a first conductor and a second conductor made of two different materials on a heating substrate, so that the heating wire and the heating substrate are integrated, so that the heating wire is heated when it is energized, and temperature detection can be performed through the heating wire when the power is off, thereby making temperature detection more accurate and temperature control more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a circular heating sheet provided by an embodiment of the utility model;

[0018] Figure 2 It is a schematic structural diagram of a square heating sheet provided in an embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of a heating control system provided by an embodiment of the utility model;

[0020] Explanation of the reference numerals: 11, heating substrate; 21, first conductor; 22, second conductor; 23, solder joint; 10, power supply; 20, control unit; 30, power switch device; 40, voltage amplification circuit module; 50, ADC analog-to-digital conversion module. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0022] like Figure 1 to Figure 2 As shown, a heating sheet with integrated heating and temperature detection described in this embodiment is used in an incense burner or an incense tasting device to heat spices, thereby achieving the effect of tasting or fumigating. The heating sheet specifically includes a heating substrate 11, and a first conductor 21 and a second conductor 22 are coiled on the surface of the heating substrate 11. The material of the first conductor 21 is different from that of the second conductor 22, and one end of the first conductor 21 is electrically connected in series with one end of the second conductor 22. The first conductor 21 and the second conductor 22 together constitute a heating wire. Exemplarily, the heating substrate 11 can be round, square or other shapes.

[0023] Specifically, when the heating sheet of this embodiment is actually used, the first conductor 21 and the second conductor 22 generate heat after being energized, and the temperature rises. The generated heat is conducted through the heating substrate 11, thereby heating the fragrance. Since the first conductor 21 and the second conductor 22 are made of different materials, a thermocouple is formed between the first conductor 21 and the second conductor 22. Therefore, when the temperature of the first conductor 21 and the second conductor 22 themselves rises, an induced voltage is formed between the two ends of the heating wire. When the heating wire is powered off, the voltage at both ends of the heating wire can be detected and converted to obtain the temperature of the heating wire, thereby obtaining the heating temperature of the heating sheet.

[0024] In this embodiment, a first conductor 21 and a second conductor 22 made of two different materials are arranged on a heating substrate 11 to form a heating wire, so that the heating wire and the heating substrate 11 are integrated. When the heating wire is powered on, it is heated. When the power is off, the temperature can be detected through the heating wire, which makes the temperature detection more accurate and the temperature control more precise.

[0025] The present embodiment describes a heating sheet that integrates heating and temperature detection. For example, the first conductor 21 is made of nickel-chromium material, and the second conductor 22 is made of nickel-silicon material. This arrangement allows the heating wire to be resistant to high temperatures and have a small internal power. It can be made into a heating wire of several ohms to more than ten ohms. When powered by a lithium battery, the power of the heating sheet can reach tens of watts, which can quickly heat spices. The present embodiment uses nickel-chromium-nickel-silicon material to form the heating wire, thereby forming a K-type thermocouple. Of course, the first conductor 21 can also be set to be made of nickel-silicon material, and the second conductor 22 can be set to be made of nickel-chromium material.

[0026] In some embodiments of the heating sheet for heating and temperature detection described in this embodiment, one end of the first conductor 21 is welded and fixed to one end of the second conductor 22. This arrangement makes the connection between the first conductor 21 and the second conductor 22 more secure and not easy to loosen.

[0027] like Figure 1 As shown, in some embodiments of the heating sheet integrated with heating and temperature detection described in this embodiment, the first conductor 21 and the second conductor 22 are respectively wound on the heating substrate 11 in a spiral shape with the welding point 23 as the center. Such a configuration is more suitable for the circular heating substrate 11, so that the heating substrate 11 is heated more fully and more evenly.

[0028] like Figure 2 As shown, in some embodiments of the heating sheet integrated with heating and temperature detection described in this embodiment, the first conductor 21 and the second conductor 22 are respectively wound on the heating substrate 11 in a reciprocating bending structure with the welding point 23 as the starting point. Such a configuration is more suitable for the square heating substrate 11, so that the heating substrate 11 is heated more fully.

[0029] The present embodiment describes a heating sheet that integrates heating and temperature detection. In some embodiments, the heating substrate 11 is made of ceramic material; it is resistant to high temperatures and has a longer service life.

[0030] like Figures 1 to 3 As shown, the second aspect of this embodiment provides a heating control system, including a power supply 10, a control unit 20, a power switching device 30, a voltage amplification circuit module 40, an ADC analog-to-digital conversion module 50 and the heating plate as described above; the power supply 10 can be direct current or alternating current.

[0031] The control end of the power switch device 30 is connected to the control unit 20, and the control unit 20 outputs a PWM signal to the control end of the power switch device 30; the switch end of the power switch device 30 is connected in series with the heating plate and then connected to the power supply 10, the detection end of the voltage amplifier circuit module 40 is connected to the heating plate, the output end of the voltage amplifier circuit module 40 is connected to the detection end of the ADC analog-to-digital conversion module 50, and the output end of the ADC analog-to-digital conversion module 50 is connected to the control unit 20. In some embodiments of the heating control system described in this embodiment, the power switch device 30 is a MOS tube or a thyristor.

[0032] Specifically, the heating wire is connected in series with the switch end of the power switch device 30. When the heating control system of this embodiment is actually used, the control unit 20 outputs a PWM signal to the control end of the power switch device 30, thereby controlling the switch state of the power switch device 30, and further controlling the heating power of the heating plate; when the PWM signal is at a low level, the switch end of the power switch device 30 is in a disconnected state, and the heating plate is powered off. At this time, the induced voltage of the heating wire is amplified by the voltage amplifier circuit to form a voltage signal. The ADC analog-to-digital conversion module 50 converts the voltage signal into a digital signal and sends the converted digital signal to the control unit 20. The control unit 20 converts the received digital signal into the temperature value of the heating plate. After the control unit 20 obtains the real-time temperature of the heating plate, it can adjust the duty cycle of the PWM signal accordingly, thereby adjusting the heating power of the heating plate so that the temperature of the heating plate reaches the required temperature.

[0033] In this way, by using the heating wire to measure the temperature when it is powered off and to heat it when it is powered on, the temperature control of the heating plate can be more accurate. This embodiment adopts the above heating plate structure, so it has all the beneficial effects of the above heating plate, which will not be repeated here.

[0034] like Figures 1 to 3 As shown, the third aspect of this embodiment further provides an incense burner, including the heating control system as described above, so as to have all the beneficial effects of the heating control system as described above, which will not be described in detail here.

[0035] The above is only a preferred embodiment of the present utility model, so any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the protection scope of the present utility model patent application.

Claims

1. A heating sheet integrating heating and temperature detection, characterized in that: It includes a heating substrate, on the surface of which a first conductor and a second conductor are coiled, the material of the first conductor is different from the material of the second conductor, one end of the first conductor is electrically connected in series with one end of the second conductor; the first conductor and the second conductor together constitute a heating wire.

2. A heating sheet integrating heating and temperature detection according to claim 1, characterized in that: The first conductor is made of nickel-chromium material, and the second conductor is made of nickel-silicon material.

3. A heating sheet integrating heating and temperature detection according to claim 1, characterized in that: One end of the first conductor is fixedly welded to one end of the second conductor.

4. A heating sheet integrating heating and temperature detection according to claim 3, characterized in that: The first conductor and the second conductor are respectively wound in a spiral shape on the heating substrate with the welding point as the center.

5. The heating sheet integrating heating and temperature detection according to claim 3, characterized in that: The first conductor and the second conductor are respectively wound on the heating substrate in a reciprocating bending structure with the welding point as the starting point.

6. A heating sheet integrating heating and temperature detection according to any one of claims 1 to 5, characterized in that: The heating substrate is made of ceramic material.

7. A heating control system, characterized in that: It comprises a power supply, a control unit, a power switch device, a voltage amplification circuit module, an ADC analog-to-digital conversion module and a heating sheet as claimed in any one of claims 1 to 6; The control end of the power switch device is connected to the control unit, and the control unit outputs a PWM signal to the control end of the power switch device; the switch end of the power switch device is connected in series with the heating plate and then connected to the power supply, the detection end of the voltage amplifier circuit module is connected to the heating plate, the output end of the voltage amplifier circuit module is connected to the detection end of the ADC analog-to-digital conversion module, and the output end of the ADC analog-to-digital conversion module is connected to the control unit.

8. A heating control system according to claim 7, characterized in that: The power switch device is a MOS tube or a thyristor.

Images