Thick film type baking tray capable of measuring temperature through thermocouple

Abstract

A thick film type baking tray capable of measuring temperature through thermocouples comprises a heating tray, a base and a plurality of thermocouples, a weak current coupler is arranged on the base and connected with weak current connecting ends of the thermocouples respectively, and strong current connecting ends of the thermocouples are connected with the heating tray. And a temperature measuring element for measuring the temperature of each weak current connecting end is arranged between the weak current connecting ends of the thermocouples, so that the weak current connecting ends are concentrated and integrally arranged in the same measuring interval. According to the thick film type baking tray capable of measuring the temperature through the thermocouples, the temperature measuring elements used for measuring the weak current connecting ends are arranged between the weak current connecting ends (namely the cold ends of the thermocouples) of the thermocouples, and the actual temperature of the cold ends of the thermocouples can be measured through the temperature measuring elements; in combination with a temperature difference value of a hot end and a cold end, which is reversely deduced through a voltage signal, a temperature value measured by the temperature measuring element and the temperature difference value are added, so that an accurate temperature value of the heating disc (namely a temperature value of the hot end of the thermocouple) can be obtained, and the temperature measurement of the thermocouple is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of baking pan technology, and in particular to a thick-film baking pan with thermocouple temperature measurement. Background Technology

[0002] Baking pans typically use thermocouples to monitor the temperature of the heating element. A baking pan consists of a base and a heating element. The cold junction of the thermocouple is connected to a low-voltage coupler on the base, while the hot junction is connected to the bottom of the heating element. When there is a temperature difference between the measuring junction (hot junction) and the reference junction (cold junction) of the thermocouple, an electromotive force (EMF) (voltage) is generated between the two different metals. This EMF is proportional to the temperature difference at the junction, forming a measurable voltage signal. The temperature difference between the hot and cold junctions can then be deduced from this voltage signal. The temperature of the reference junction is usually room temperature. Adding the room temperature and the temperature difference gives the temperature of the measuring junction, i.e., the temperature of the heating element. However, when the baking pan is heated, the temperature of the cold junction of the thermocouple rises. Therefore, the actual temperature of the reference junction is not room temperature, resulting in a difference between the actual temperature of the heating element and the temperature value obtained above. This leads to inaccurate thermocouple temperature measurements.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of this invention is to provide a thermocouple-based thick-film baking pan with a simple structure, accurate temperature measurement, good cooking effect, good user experience, and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] A thick-film baking pan for thermocouple temperature measurement, designed for this purpose, includes a heating plate, a base, and several thermocouples. The base is characterized by having a low-voltage coupler that electrically connects to the low-voltage terminals of each thermocouple. The high-voltage terminals of the thermocouples are connected to the heating plate. Temperature-sensing elements for measuring the temperature of each low-voltage terminal are arranged between the low-voltage terminals of the thermocouples, so that the low-voltage terminals are concentrated and integrated within the same measurement range.

[0006] A coupling device is provided between the heating plate and the base, and the heating plate and the base are coupled together through the coupling device.

[0007] The coupling device includes an upper coupling seat disposed at the bottom of the heating plate and a lower coupling seat disposed on the base, and the upper coupling seat and the lower coupling seat are coupled to each other.

[0008] The low-voltage coupler and temperature sensing element are mounted on the lower coupling base. The low-voltage coupler is equipped with several low-voltage connectors, each corresponding to a thermocouple. The low-voltage connectors are electrically connected to the low-voltage connection terminals of the thermocouples.

[0009] The temperature sensing element is mounted on the low-voltage coupler and is located between several low-voltage connectors.

[0010] An upper coupler is provided on the upper coupling base, and a lower coupler is provided on the lower coupling base. The upper coupler and the lower coupler are coupled to each other.

[0011] The base is equipped with a control circuit board, which is electrically connected to the low-voltage coupler, the temperature sensing element, and the lower coupler.

[0012] The upper coupling seat is provided with several first mounting holes, and the thermocouple is installed on the corresponding first mounting hole.

[0013] The temperature sensing element is a temperature sensor.

[0014] A thick-film heating element is installed at the bottom of the heating plate, and the upper coupler is electrically connected to the thick-film heating element.

[0015] This invention relates to a thick-film thermocouple-based baking pan. A temperature-sensing element is installed between the weak-current junctions (cold junctions) of several thermocouples to measure the temperature of each junction. This element measures the actual temperature of the cold junction. Combined with the temperature difference between the hot and cold junctions derived from the voltage signal, the measured temperature and temperature difference are summed to obtain an accurate heating pan temperature (hot junction temperature). This makes thermocouple temperature measurement more precise. Furthermore, by connecting multiple thermocouples to the same weak-current coupler and installing a single temperature-sensing element on the coupler, the weak-current junctions are concentrated and integrated within the same measurement range. A single temperature-sensing element can detect the cold junction temperatures of multiple thermocouples, reducing manufacturing costs. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the baking pan in one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of the baking pan in one embodiment of the present invention.

[0018] Figure 3 This is a partial structural diagram of the baking pan in one embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the internal structure of the base in one embodiment of the present invention.

[0020] Figure 5 This is a cross-sectional view of the lower coupling seat in one embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the overall structure of the lower coupling seat in one embodiment of the present invention.

[0022] Figure 7 This is a partial structural diagram of the baking pan from another position in one embodiment of the present invention.

[0023] Figure 8 for Figure 7 A magnified structural diagram of point A in the middle.

[0024] Figure 9 This is an exploded view of the heating plate in one embodiment of the present invention.

[0025] Figure 10 This is an exploded structural diagram of the upper coupling seat in one embodiment of the present invention.

[0026] Figure 11 This is a schematic diagram of the overall structure of the upper coupling seat in one embodiment of the present invention. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] See Figures 1-11 This thermocouple-based thick-film baking pan includes a heating plate 1, a base 2, and several thermocouples 3. A low-voltage coupler 4 is installed on the base 2, and the low-voltage coupler 4 is electrically connected to the low-voltage connection terminals 5 of each thermocouple 3. The high-voltage connection terminals 6 of the thermocouples 3 are connected to the bottom of the heating plate 1. A temperature sensing element 7 is installed between the low-voltage connection terminals 5 of the several thermocouples 3 to measure the temperature of each low-voltage connection terminal 5, so that the several low-voltage connection terminals 5 are concentrated and integrated in the same measurement range. The temperature of the low-voltage connection terminal 5 (i.e., the cold junction of the thermocouple 3) of the thermocouple 3 is measured by the temperature sensing element 7 to compensate for the temperature of the thermocouple 3 and achieve accurate temperature measurement.

[0029] A coupling device is provided between the heating plate 1 and the base 2, and the heating plate 1 and the base 2 are coupled together through the coupling device.

[0030] The coupling device includes an upper coupling seat 8 disposed at the bottom of the heating plate 1 and a lower coupling seat 9 disposed on the base 2, and the upper coupling seat 8 and the lower coupling seat 9 are coupled to each other.

[0031] The low-voltage coupler 4 and the temperature sensing element 7 are mounted on the lower coupling base 9. The low-voltage coupler 4 is provided with several low-voltage connectors 10, which correspond one-to-one with the thermocouples 3. The low-voltage connectors 10 are electrically connected to the low-voltage connection terminals 5 of the thermocouples 3. The low-voltage connectors 10 are low-voltage contact spring pins, which make conductive contact with the low-voltage connection terminals 5 of the thermocouples 3.

[0032] Thermocouples 3 and low-voltage connectors 10 are arranged in two horizontally and three vertically, for a total of six. Temperature sensing element 7 is located in the middle of the measurement range.

[0033] Temperature sensing element 7 is mounted on low-voltage coupler 4 and is located between several low-voltage connectors 10. The low-voltage coupler 4 is provided with a second mounting hole 16 for mounting temperature sensing element 7. A fixing plate 21 is provided at the bottom of temperature sensing element 7. The fixing plate 21 is provided with fixing hole 22. The lower coupling seat 9 is provided with fixing post hole 23. Screws pass through fixing hole 22 and are fastened to fixing post hole 23 to fix temperature sensing element 7 on lower coupling seat 9.

[0034] An upper coupler 11 is provided on the upper coupling seat 8, and a lower coupler 12 is provided on the lower coupling seat 9. The upper coupler 11 and the lower coupler 12 are coupled to each other.

[0035] The upper coupling seat 8 is provided with a high-voltage pin 17, and the lower coupling seat 9 is provided with a high-voltage socket 18. The high-voltage pin 17 and the high-voltage socket 18 are connected to each other to form a conductive contact.

[0036] A control circuit board 13 is provided on the base 2. The control circuit board 13 is electrically connected to the low-voltage coupler 4, the temperature measuring element 7 and the lower coupler 12 respectively.

[0037] The upper coupling seat 8 is provided with several first mounting holes 14, and the thermocouple 3 is installed on the corresponding first mounting holes 14.

[0038] Temperature sensing element 7 is an NTC temperature sensor.

[0039] A thick film heating component 15 is provided at the bottom of the heating plate 1. The upper coupler 11 is electrically connected to the thick film heating component 15 through the (high voltage) electrode 19 to supply power to the thick film heating component 15. The thick film heating component 15 is used to heat the heating plate 1. The thick film heating component 15 is a thick film heating plate.

[0040] The high-voltage connection 6 of thermocouple 3 (i.e. the hot end of thermocouple 3) is connected to the wiring terminal at the bottom of heating plate 1 or the wiring terminal of thick film heating component 15 via wire 20.

[0041] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A thick film type oven plate for measuring temperature by thermocouple, comprising a heating plate (1), a base (2) and a plurality of thermocouples (3), characterized in that: The base (2) is provided with a weak current coupler (4), the weak current coupler (4) is electrically connected with the weak current connection end (5) of each thermocouple (3) respectively, the strong current connection end (6) of the thermocouple (3) is connected with the heating disc (1), the weak current connection end (5) of the plurality of thermocouples (3) is provided with a temperature measuring element (7) for measuring the temperature of each weak current connection end (5), so that the plurality of weak current connection ends (5) are concentrated and integrated on the same measurement interval.

2. The thermocouple temperature-sensing thick film oven deck of claim 1 wherein: The coupling device is arranged between the heating disc (1) and the base (2), and the heating disc (1) and the base (2) are coupled and connected through the coupling device.

3. The thermocouple temperature-sensing thick film oven deck of claim 2 wherein: The coupling device comprises an upper coupling seat (8) arranged at the bottom of the heating disc (1) and a lower coupling seat (9) arranged on the base (2), and the upper coupling seat (8) and the lower coupling seat (9) are coupled and connected with each other.

4. The thermocouple temperature-sensing thick film oven deck of claim 3 wherein: The weak current coupler (4) and the temperature measuring element (7) are installed on the lower coupling seat (9), the weak current coupler (4) is provided with a plurality of weak current connecting pieces (10), the weak current connecting pieces (10) correspond to the thermocouples (3) one by one, and the weak current connecting pieces (10) are electrically connected with the weak current connection end (5) of the thermocouples (3).

5. The thermocouple temperature-sensing thick film oven deck of claim 4 wherein: The temperature measuring element (7) is arranged on the weak current coupler (4), and the temperature measuring element (7) is located between the plurality of weak current connecting pieces (10).

6. The thermocouple temperature-sensing thick film oven deck of claim 5 wherein: The upper coupling seat (8) is provided with an upper coupler (11), and the lower coupling seat (9) is provided with a lower coupler (12), and the upper coupler (11) and the lower coupler (12) are coupled and connected with each other.

7. The thermocouple temperature-sensing thick film oven deck of claim 6 wherein: The base (2) is provided with a control circuit board (13), and the control circuit board (13) is electrically connected with the weak current coupler (4), the temperature measuring element (7) and the lower coupler (12) respectively.

8. The thermocouple temperature-sensing thick film oven deck of claim 6 wherein: The upper coupling seat (8) is provided with a plurality of first mounting holes (14), and the thermocouples (3) are mounted on the corresponding first mounting holes (14).

9. The thermocouple temperature-sensing thick film oven deck of claim 1 wherein: The temperature measuring element (7) is a temperature sensor.

10. The thermocouple temperature-sensing thick film oven deck of claim 6 wherein: The bottom of the heating disc (1) is provided with a thick film heating component (15), and the upper coupler (11) is electrically connected with the thick film heating component (15).

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