Pressure cooker with temperature detection function

Abstract

A pressure cooker with a temperature detection function comprises a base and a cooker body installed on the base, a thick film heating component is arranged at the bottom of the cooker body, the cooker body is in coupling connection with the base through a coupler, a temperature measuring mechanism used for measuring the temperature of the thick film heating component is arranged on the coupler, and a control circuit board is arranged in the base. The control circuit board is electrically connected with the temperature measuring mechanism and the coupler, the coupler is electrically connected with the thick film heating component, and the control circuit board controls the thick film heating component to work according to the temperature value detected by the temperature measuring mechanism so as to control the pressure in the pot body to be within the set value range. According to the pressure cooker, the internal pressure of the cooker body can be adjusted, and the internal pressure of the cooker body does not need to be reduced by releasing steam, so that the heat loss can be reduced, and the energy consumption of the pressure cooker is reduced; in addition, the pressure cooker adopts matching of the base and the cooker body, a traditional inner container is omitted, the overall size of the pressure cooker is smaller, the cooker body is made of stainless steel materials, and the pressure borne by the cooker body can be increased.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure cookers, in particular to a pressure cooker with a temperature detection function. Background Art

[0002] The pressure cooker includes a pot body, an inner pot and a lid. The lid is closed on the top of the inner pot. A heating plate for heating the inner pot is provided at the bottom of the inner pot. A pressure regulating valve and a safety valve are provided on the lid. When the internal pressure of the inner pot is higher than the set value, the pressure regulating valve will automatically open and release some steam to reduce the pressure. When the internal pressure of the inner pot returns to normal, the pressure regulating valve will automatically close to increase the pressure inside the inner pot. When the pressure regulating valve fails, if the internal pressure of the inner pot is too high, the safety valve will open to automatically release steam to prevent the pressure cooker from exploding or being damaged. The inner pot is made of aluminum, which can withstand a relatively small pressure. In addition, the overall volume of the pressure cooker is large. The pressure regulating valve can only open when the internal pressure of the inner pot reaches the set value, and cannot adjust the internal pressure of the inner pot. Moreover, the pressure regulating valve reduces the internal pressure of the inner pot by releasing steam, which will cause heat loss, making the energy consumption of the pressure cooker high.

[0003] Therefore, further improvements are necessary. Summary of the Invention

[0004] The purpose of the present invention is to provide a pressure cooker with a temperature detection function that has a simple structure, accurate temperature measurement, safety, reliability, high stability and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] A pressure cooker with a temperature detection function designed for this purpose includes a base and a pot body mounted on the base, characterized in that a thick-film heating component is provided at the bottom of the pot body, the pot body and the base are coupled via a coupler, the coupler is provided with a temperature measuring mechanism for measuring the temperature of the thick-film heating component, a control circuit board is provided in the base, the control circuit board is electrically connected to the temperature measuring mechanism and the coupler respectively, and the coupler is electrically connected to the thick-film heating component, and the control circuit board controls the operation of the thick-film heating component according to the temperature value detected by the temperature measuring mechanism to control the pressure inside the pot body within a set value range.

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

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

[0008] A pot cover is provided on the top of the pot body, and a safety valve for relieving pressure inside the pot body is provided on the pot cover.

[0009] A temperature measuring cavity is provided on the coupler, and a temperature measuring part is provided on the upper end of the output end. The temperature measuring part is located on the temperature measuring cavity, and the temperature measuring cavity is filled with thermal conductive glue. The temperature measuring element is electrically connected to the output end, and the temperature measuring part and the temperature measuring element are embedded in the thermal conductive glue. The temperature measuring element measures the temperature of the thermal conductive glue to feedback the temperature of the output end.

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

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

[0012] The coupling piece is provided with a plurality of connecting pieces, the connecting pieces correspond to the thermocouples one by one, and the connecting pieces are electrically connected to the output ends of the thermocouples.

[0013] The temperature measuring cavities are respectively arranged on both sides of the upper coupling piece, a plurality of mounting holes are arranged on the bottom of the temperature measuring cavity, and the output ends are mounted on the mounting holes.

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

[0015] The pressure cooker of the present invention is provided with a thick film heating component at the bottom of the pot body, and the pot body and the base are coupled by a coupler. The coupler is provided with a temperature measuring mechanism for measuring the temperature of the thick film heating component. The control circuit board controls the operation of the thick film heating component according to the temperature value detected by the temperature measuring mechanism to control the steam temperature inside the pot body, and then controls the pressure inside the pot body within the set value range. Through this structure, the internal pressure of the pot body can be adjusted, and there is no need to reduce the internal pressure of the pot body by releasing steam, thereby reducing heat loss and thus reducing the energy consumption of the pressure cooker; in addition, the pressure cooker adopts a combination of the base and the pot body, and eliminates the traditional inner pot, so that the overall volume of the pressure cooker is smaller. The pot body is made of stainless steel material, which can increase the pressure that the pot body can withstand, so that the pressure cooker can be applied to more scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a cross-sectional view of a pressure cooker according to an embodiment of the present invention.

[0017] Figure 2 FIG. 4 is a cross-sectional view of a coupler according to an embodiment of the present invention.

[0018] Figure 3 FIG. 1 is a schematic diagram of the overall structure of a coupler in one embodiment of the present invention.

[0019] Figure 4 FIG. 1 is a schematic diagram of the exploded structure of a coupler in one embodiment of the present invention.

[0020] Figure 5 FIG. 2 is a schematic diagram of the exploded structure of a coupler in another aspect according to an embodiment of the present invention.

[0021] Figure 6 Schematic diagram of the overall structure of a thermocouple in one embodiment of the present invention. DETAILED DESCRIPTION

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

[0023] See also Figures 1-6 The pressure cooker with temperature detection function includes a base 2 and a pot body 1 installed on the base 2. A thick film heating component 5 is provided at the bottom of the pot body 1. The thick film heating component 5 is a thick film heating plate. The thick film heating component 5 is used to heat the pot body 1. The pot body 1 and the base 2 are coupled and connected by a coupler 6. The coupler 6 is provided with a temperature measuring mechanism for measuring the temperature of the thick film heating component 5. A control circuit board 7 is provided in 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 component 5. The control circuit board 7 controls the operation of the thick film heating component 5 (i.e., controls the power of the thick film heating component 5) according to the temperature value detected by the temperature measuring mechanism to control the steam temperature inside the pot body 1, and then controls the pressure inside the pot body 1 within a set value range to prevent the pressure inside the pot body 1 from exceeding the set value. Steam at different temperatures has different pressures. Therefore, by controlling the steam temperature, the pressure inside the pot body 1 can be controlled. The relationship between steam temperature and pressure can be referred to the saturated steam pressure and temperature comparison table; in addition, the set value of the pressure inside the pot body 1 can be adjusted.

[0024] The temperature measuring mechanism includes a coupling 8, a temperature measuring element 11 and several thermocouples 9. The output end 10 of the thermocouple 9 is connected to the coupling 8, the temperature sensing end 4 of the thermocouple 9 is connected to the thick film heating component 5, the coupling 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 end 10 is connected to the coupling part 8, and a temperature measuring cavity 11 is provided on the coupler 6. A temperature measuring part 12 is provided at the upper end of the output end 10. The temperature measuring part 12 is located on the temperature measuring cavity 11, and the temperature measuring cavity 11 is filled with thermal conductive glue 13. The temperature measuring element 11 is electrically connected to the output end 10. The temperature measuring part 12 and the temperature measuring element 11 are embedded in the thermal conductive glue 13, thereby fixing the temperature measuring element 11. The thermal conductive glue 13 seals and covers the temperature measuring part 12 and the temperature measuring element 11. The temperature measuring element 11 measures the temperature of the thermal conductive glue 13 to feedback the temperature of the output end 10; the thermal conductive glue 13 can transfer the heat of the temperature measuring part 12 to the temperature measuring element 11, and then measure the temperature of the thermal conductive glue 13 through the temperature measuring element 11, thereby measuring the temperature of the temperature measuring part 12, that is, the temperature of the output end 10 is obtained.

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

[0027] A pot cover 3 is provided on the top of the pot body 1, and a safety valve 16 for relieving pressure inside the pot body 1 is provided on the pot cover 3; when the temperature measuring mechanism fails, if the pressure inside the pot body 1 is too high, the safety valve 16 opens to relieve pressure inside the pot body 1, thereby playing 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, and the temperature measuring cavity 11 is arranged 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 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 end) and the reference junction (cold end) of the 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 to form a measurable voltage signal. The temperature difference between the hot end and the cold end can then be inferred through the voltage signal. The temperature measuring element 11 can measure the actual temperature of the cold end of the thermocouple (i.e., the output end 10). Combined with the temperature difference between the hot end and the cold end inferred through the voltage signal, the temperature value measured by the temperature measuring element 11 and the temperature difference value are added to obtain the accurate temperature value of the thick film heating component 5, i.e., the temperature value of the hot end of the thermocouple 9. The hot end of the thermocouple 9 is the temperature sensing end 4.

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

[0031] The temperature measuring element 11 is an NTC temperature sensor, and the external wires of the NTC temperature sensor are connected to two of the output terminals 10; the temperature value measured by the temperature measuring 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 member 17 is provided on the upper coupling seat 14, and a lower coupling member 18 is provided on the lower coupling seat 15. The upper coupling member 17 and the lower coupling member 18 are coupled to each other. The upper coupling member 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 member 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 member 8 is provided with a plurality of connectors 20 , which correspond to the thermocouples 9 one by one. The connectors 20 are electrically connected to the output ends 10 of the thermocouples 9 . The connectors 20 are contact spring pins. The coupling member 8 is fixed on the lower coupling seat 15 .

[0035] The temperature measuring cavity 11 is respectively arranged on both sides of the upper coupling member 17, and a plurality of mounting holes 21 are provided at the bottom of the temperature measuring cavity 11, and the output end 10 is mounted on the mounting hole 21; the coupling members 8 are respectively arranged on both sides of the lower coupling seat 15, therefore, two groups of thermocouples 9 are arranged, with two arranged horizontally and two arranged vertically in each group, for a total of eight thermocouples 9.

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

[0037] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

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

2. The pressure cooker with temperature detection function according to claim 1, characterized in that: The temperature measuring mechanism comprises a coupling member (8), a temperature measuring element (11) and a plurality of thermocouples (9), wherein the output end (10) of the thermocouple (9) is connected to the coupling member (8), the temperature sensing end (4) of the thermocouple (9) is connected to the thick film heating component (5), the coupling member (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: A pot cover (3) is provided on the top of the pot body (1), and a safety valve (16) for relieving pressure inside the pot body (1) is provided on the pot cover (3).

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), a temperature measuring portion (12) is provided on the upper end of the output end (10), the temperature measuring portion (12) is located on the temperature measuring cavity (11), the temperature measuring cavity (11) is filled with thermal conductive adhesive (13), the temperature measuring element (11) is electrically connected to the output end (10), the temperature measuring portion (12) and the temperature measuring element (11) are embedded in the thermal conductive adhesive (13), and the temperature measuring element (11) feeds back the temperature of the output end (10) by measuring the temperature of the thermal 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) 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 arranged 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 to the base (2).

7. The pressure cooker with temperature detection function according to claim 6, characterized in that: An upper coupling member (17) is provided on the upper coupling seat (14), and a lower coupling member (18) is provided on the lower coupling seat (15). The upper coupling member (17) and the lower coupling member (18) are coupled to each other, and the upper coupling member (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: A plurality of connecting members (20) are provided on the coupling member (8), the connecting members (20) correspond to the thermocouples (9) one by one, and the connecting members (20) are electrically connected to the output ends (10) of the thermocouples (9).

9. The pressure cooker with temperature detection function according to claim 7, characterized in that: The temperature measuring chamber (11) is respectively arranged on both sides of the upper coupling member (17), a plurality of mounting holes (21) are arranged at the bottom of the temperature measuring chamber (11), and the output end (10) is mounted on the mounting holes (21).

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

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