Pressure cooker with temperature detection function

Abstract

A pressure cooker with temperature detection function includes a base and a pot body mounted on the base. A thick-film heating element is disposed at the bottom of the pot body. The pot body and the base are coupled together via a coupler. The coupler is equipped with a temperature measuring mechanism for measuring the temperature of the thick-film heating element. A control circuit board is disposed inside the base. The control circuit board is electrically connected to the temperature measuring mechanism and the coupler, and the coupler is electrically connected to the thick-film heating element. The control circuit board controls the operation of the thick-film heating element based on the temperature value detected by the temperature measuring mechanism, thereby controlling the pressure inside the pot body within a set range. This pressure cooker can adjust the internal pressure of the pot body without releasing steam to reduce the internal pressure, thus reducing heat loss and energy consumption. Furthermore, the pressure cooker uses a base and pot body combination, eliminating the traditional inner liner, resulting in a smaller overall size. The pot body is made of stainless steel, which increases the pressure it can withstand.

Description

Technical Field

[0001] This utility model relates to the field of pressure cooker technology, and in particular to a pressure cooker with temperature detection function. Background Technology

[0002] A pressure cooker consists of a pot body, an inner pot, and a lid. The lid covers the top of the inner pot, and a heating plate is located at the bottom of the inner pot for heating. The lid is equipped with a pressure regulating valve and a safety valve. When the internal pressure of the inner pot exceeds the set value, the pressure regulating valve automatically opens, releasing some steam to reduce the pressure. When the internal pressure of the inner pot returns to normal, the pressure regulating valve automatically closes to increase the internal pressure. If the pressure regulating valve fails, and the internal pressure of the inner pot is too high, the safety valve opens to automatically release steam, preventing the pressure cooker from exploding or being damaged. The inner pot is made of aluminum, which has a relatively low pressure resistance. Furthermore, the overall size of the pressure cooker is relatively large. The pressure regulating valve can only open when the internal pressure of the inner pot reaches the set value, and cannot regulate the internal pressure. Moreover, the pressure regulating valve releases steam to reduce the internal pressure of the inner pot, leading to heat loss and resulting in high energy consumption for the pressure cooker.

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

[0004] The purpose of this invention is to provide a pressure cooker with temperature detection function that is simple in structure, accurate in temperature measurement, safe and reliable, highly stable and practical, so as to overcome the shortcomings of the prior art.

[0005] A pressure cooker with temperature detection function designed for this purpose includes a base and a pot body mounted on the base. The pot body is characterized by a thick-film heating element at its bottom, the pot body being coupled to the base via a coupler, the coupler having a temperature measuring mechanism for measuring the temperature of the thick-film heating element, and a control circuit board inside the base. The control circuit board is electrically connected to the temperature measuring mechanism and the coupler, and the coupler is electrically connected to the thick-film heating element. The control circuit board controls the operation of the thick-film heating element based on the temperature value detected by the temperature measuring mechanism, thereby controlling the pressure inside the pot body within a set range.

[0006] The temperature measuring mechanism includes a coupling element, a temperature measuring element, and several thermocouples. The output end of the thermocouple is connected to the coupling element, the temperature sensing end of the thermocouple is connected to the thick film heating element, the coupling element is electrically connected to the control circuit board, and the temperature measuring element is used to measure the temperature at the output end.

[0007] The pot body is made of stainless steel.

[0008] The pot body is equipped with a lid on top, and the lid is equipped with a safety valve for relieving pressure inside the pot body.

[0009] The coupler is equipped with a temperature measuring cavity, and a temperature measuring part is provided at the upper end of the output terminal. The temperature measuring part is located on the temperature measuring cavity, which is filled with thermally conductive adhesive. The temperature measuring element is electrically connected to the output terminal. The temperature measuring part and the temperature measuring element are embedded in the thermally conductive adhesive. The temperature measuring element feeds back the temperature of the output terminal by measuring the temperature of the thermally conductive adhesive.

[0010] The coupler includes an upper coupling seat and a lower coupling seat that are coupled to each other. The upper coupling seat is fixed to the bottom of the pot body, the temperature measuring cavity is set on the upper coupling seat, the thick film heating component is located above the temperature measuring cavity, and the lower coupling seat is fixed on the base.

[0011] An upper coupling element is provided on the upper coupling base, and a lower coupling element is provided on the lower coupling base. The upper coupling element and the lower coupling element are coupled to each other, and the upper coupling element is electrically connected to the thick film heating component through an electrode.

[0012] The coupling element is equipped with several connectors, each corresponding to a thermocouple, and the connectors are electrically connected to the output terminals of the thermocouples.

[0013] Temperature measuring chambers are respectively set on both sides of the upper coupling component, and several mounting holes are provided at the bottom of the temperature measuring chambers. The output end is installed on the mounting holes.

[0014] The temperature sensing element is an NTC temperature sensor.

[0015] This invention relates to a pressure cooker that incorporates a thick-film heating element at the bottom of the pot body. The pot body and base are coupled together via a coupler, which includes a temperature measuring mechanism for the heating element. The control circuit board operates the heating element based on the temperature readings, thereby controlling the steam temperature inside the pot and consequently maintaining the pressure within a set range. This structure allows for pressure regulation without releasing steam to reduce internal pressure, thus minimizing heat loss and energy consumption. Furthermore, the pressure cooker utilizes a base and pot body combination, eliminating the need for a traditional inner liner, resulting in a smaller overall size. The pot body is made of stainless steel, enhancing its pressure resistance and making it suitable for a wider range of applications. Attached Figure Description

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

[0017] Figure 2 This is a cross-sectional view of the coupler in one embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the overall structure of the coupler in one embodiment of the present invention.

[0019] Figure 4 This is an exploded view of the coupler in one embodiment of the present invention.

[0020] Figure 5 This is an exploded structural diagram of the coupler from another position in one embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the overall structure of a thermocouple in one embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] See Figures 1-6 This pressure cooker with temperature detection function includes a base 2 and a pot body 1 mounted on the base 2. A thick-film heating element 5 is provided at the bottom of the pot body 1. The thick-film heating element 5 is a thick-film heating plate used to heat the pot body 1. The pot body 1 and the base 2 are coupled together via a coupler 6. The coupler 6 is equipped with a temperature measuring mechanism for measuring the temperature of the thick-film heating element 5. A control circuit board 7 is provided inside the base 2. The control circuit board 7 is electrically connected to the temperature measuring mechanism and the coupler 6. The coupler 6 is electrically connected to the thick-film heating element 5. The control circuit board 7 controls the operation of the thick-film heating element 5 (i.e., controls the power of the thick-film heating element 5) according to the temperature value detected by the temperature measuring mechanism, so as to control the steam temperature inside the pot body 1, and thus control the pressure inside the pot body 1 within the set value range, preventing the pressure inside the pot body 1 from exceeding the set value. The pressure of steam at different temperatures is also different. Therefore, controlling the steam temperature can control the pressure inside the pot body 1. The relationship between steam temperature and pressure can be found in the saturated steam pressure and temperature comparison table. In addition, the set value of the internal pressure of the pot body 1 can be adjusted.

[0024] The temperature measuring mechanism includes a coupling element 8, a temperature measuring element 11, and several thermocouples 9. The output end 10 of the thermocouple 9 is connected to the coupling element 8, the temperature sensing end 4 of the thermocouple 9 is connected to the thick film heating component 5, the coupling element 8 is electrically connected to the control circuit board 7, and the temperature measuring element 11 is used to measure the temperature of the output end 10.

[0025] The lower end of the output terminal 10 is connected to the coupling member 8. A temperature measuring cavity 11 is provided on the coupler 6. A temperature measuring part 12 is provided on the upper end of the output terminal 10. The temperature measuring part 12 is located on the temperature measuring cavity 11. The temperature measuring cavity 11 is filled with thermally conductive adhesive 13. The temperature measuring element 11 is electrically connected to the output terminal 10. The temperature measuring part 12 and the temperature measuring element 11 are embedded in the thermally conductive adhesive 13, thereby fixing the temperature measuring element 11. The thermally conductive adhesive 13 seals and covers the temperature measuring part 12 and the temperature measuring element 11. The temperature measuring element 11 feeds back the temperature of the output terminal 10 by measuring the temperature of the thermally conductive adhesive 13. The thermally conductive adhesive 13 can transfer the heat of the temperature measuring part 12 to the temperature measuring element 11. Then, the temperature of the thermally conductive adhesive 13 is measured by the temperature measuring element 11, thereby measuring the temperature of the temperature measuring part 12, that is, obtaining the temperature of the output terminal 10.

[0026] The pot body 1 is made of stainless steel, which can increase the pressure that the pot body 1 can withstand, and thus allow for setting a higher internal pressure setting value for the pot body 1.

[0027] The pot body 1 is equipped with a pot lid 3 on top, and a safety valve 16 is provided on the pot lid 3 for relieving pressure inside the pot body 1. When the temperature measuring mechanism fails, if the pressure inside the pot body 1 is too high, the safety valve 16 will open to relieve pressure inside the pot body 1 and play a safety role. The working principle of the safety valve 16 is existing technology and will not be described in detail here.

[0028] The coupler 6 includes an upper coupling seat 14 and a lower coupling seat 15 that are coupled to each other. The upper coupling seat 14 is fixed to the bottom of the pot body 1. The temperature measuring cavity 11 is disposed on the upper coupling seat 14. The thick film heating component 5 is located above the temperature measuring cavity 11, that is, the thick film heating component 5 is located above the temperature measuring part 12 and is relatively close to the temperature measuring part 12. The lower coupling seat 15 is fixed on the base 2.

[0029] When there is a temperature difference between the measuring junction (hot junction) and the reference junction (cold junction) of thermocouple 9, an electromotive force (voltage) will be generated between the two different metals. This electromotive force is proportional to the temperature difference of the junction, forming a measurable voltage signal. The temperature difference between the hot junction and the cold junction can be deduced from the voltage signal. The temperature sensing element 11 can measure the actual temperature of the cold junction of the thermocouple (i.e., the output terminal 10). By combining the temperature difference between the hot junction and the cold junction deduced from the voltage signal, the temperature value measured by the temperature sensing element 11 and the temperature difference value can be added together to obtain the accurate temperature value of the thick film heating component 5, i.e., the temperature value of the hot junction of thermocouple 9. The hot junction of thermocouple 9 is the sensing junction 4.

[0030] The temperature sensing element 11 is located between each temperature sensing section 12, and the temperature sensing element 11 is set close to the temperature sensing section 12, so that one temperature sensing section 12 can accurately measure the output end 10 temperature of multiple thermocouples 9, which can reduce manufacturing costs.

[0031] The temperature sensing element 11 is an NTC temperature sensor, and the wires leading out from the NTC temperature sensor are connected to two of the output terminals 10. The temperature value measured by the temperature sensing element 11 is fed back to the control circuit board 7, and the temperature difference value measured by the thermocouple 9 is fed back to the control circuit board 7. The control circuit board 7 calculates the temperature of the thick film heating component 5 based on the measured temperature value and the temperature difference value.

[0032] An upper coupling element 17 is provided on the upper coupling seat 14, and a lower coupling element 18 is provided on the lower coupling seat 15. The upper coupling element 17 and the lower coupling element 18 are coupled to each other. The upper coupling element 17 is electrically connected to the thick film heating component 5 through the electrode 19 to supply power to the thick film heating component 5. The control circuit board 7 is electrically connected to the lower coupling element 18.

[0033] The upper coupling member 17 is provided with a pin 22, and the lower coupling member 18 is provided with a socket 23. The pin 22 and the socket 23 are plugged into each other to form a conductive contact.

[0034] The coupling element 8 is provided with several connectors 20, each corresponding to a thermocouple 9. The connector 20 is electrically connected to the output end 10 of the thermocouple 9. The connector 20 is a contact spring pin. The coupling element 8 is fixed on the lower coupling seat 15.

[0035] Temperature measuring chambers 11 are respectively set on both sides of the upper coupling member 17. Several mounting holes 21 are provided at the bottom of the temperature measuring chamber 11, and the output end 10 is installed on the mounting holes 21. The coupling members 8 are respectively set on both sides of the lower coupling seat 15. Therefore, two sets of thermocouples 9 are set, with 2 thermocouples set horizontally and 2 thermocouples set vertically in each set, for a total of 8 thermocouples 9.

[0036] The temperature sensing end 4 of thermocouple 9 is connected to the wiring terminal at the bottom of thick film heating component 5.

[0037] 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 pressure cooker with temperature detection function, comprising a base (2) and a pot body (1) mounted on the base (2), characterized in that: A thick film heating element (5) is provided at the bottom of the pot body (1). The pot body (1) and the base (2) are coupled together by a coupler (6). A temperature measuring mechanism for measuring the temperature of the thick film heating element (5) is provided on the coupler (6). A control circuit board (7) is provided inside the base (2). The control circuit board (7) is electrically connected to the temperature measuring mechanism and the coupler (6) respectively. The coupler (6) is electrically connected to the thick film heating element (5). The control circuit board (7) controls the operation of the thick film heating element (5) according to the temperature value detected by the temperature measuring mechanism, so as to control the pressure inside the pot body (1) within the set value range.

2. The pressure cooker with temperature detection function according to claim 1, characterized in that: The temperature measuring mechanism includes a coupling element (8), a temperature measuring element (11), and several thermocouples (9). The output end (10) of the thermocouple (9) is connected to the coupling element (8), the temperature sensing end (4) of the thermocouple (9) is connected to the thick film heating component (5), the coupling element (8) is electrically connected to the control circuit board (7), and the temperature measuring element (11) is used to measure the temperature of the output end (10).

3. The pressure cooker with temperature detection function according to claim 1, characterized in that: The pot body (1) is made of stainless steel.

4. The pressure cooker with temperature detection function according to claim 1, characterized in that: The pot body (1) is provided with a pot lid (3) on top, and a safety valve (16) is provided on the pot lid (3) for depressurizing the inside of the pot body (1).

5. The pressure cooker with temperature detection function according to claim 2, characterized in that: A temperature measuring cavity (11) is provided on the coupler (6), and a temperature measuring part (12) is provided on the upper end of the output terminal (10). The temperature measuring part (12) is located on the temperature measuring cavity (11), and the temperature measuring cavity (11) is filled with thermally conductive adhesive (13). The temperature measuring element (11) is electrically connected to the output terminal (10). The temperature measuring part (12) and the temperature measuring element (11) are embedded in the thermally conductive adhesive (13). The temperature measuring element (11) feeds back the temperature of the output terminal (10) by measuring the temperature of the thermally conductive adhesive (13).

6. The pressure cooker with temperature detection function according to claim 5, characterized in that: The coupler (6) includes an upper coupling seat (14) and a lower coupling seat (15) that are coupled to each other. The upper coupling seat (14) is fixed to the bottom of the pot body (1), the temperature measuring cavity (11) is set on the upper coupling seat (14), the thick film heating component (5) is located above the temperature measuring cavity (11), and the lower coupling seat (15) is fixed on the base (2).

7. The pressure cooker with temperature detection function according to claim 6, characterized in that: An upper coupling element (17) is provided on the upper coupling seat (14), and a lower coupling element (18) is provided on the lower coupling seat (15). The upper coupling element (17) and the lower coupling element (18) are coupled to each other. The upper coupling element (17) is electrically connected to the thick film heating component (5) through the electrode (19).

8. The pressure cooker with temperature detection function according to claim 5, characterized in that: The coupling member (8) is provided with several connectors (20), each connector (20) corresponds to a thermocouple (9), and the connector (20) is electrically connected to the output end (10) of the thermocouple (9).

9. The pressure cooker with temperature detection function according to claim 7, characterized in that: Temperature measuring chambers (11) are respectively set on both sides of the upper coupling member (17). Several mounting holes (21) are provided at the bottom of the temperature measuring chambers (11), and the output end (10) is installed on the mounting holes (21).

10. The pressure cooker with temperature detection function according to claim 2, characterized in that: The temperature sensing element (11) is an NTC temperature sensor.

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