Sensor and electric pressure cooker

Abstract

A sensor and an electric pressure cooker, comprising a shell, an inductance component, a push rod, a constant damping diaphragm, a linear adjustment screw, a connecting wire and a zero-point adjustment screw. The shell comprises an outer shell, a cover, a metal sleeve and a sealing ring. The inductance component comprises a reset elastic member, a magnetic core, a coil, a wire rack, a fixing sleeve and a PCB. The sensor and the pressure cooker are provided with the shell, the inductance component, the push rod, the constant damping diaphragm, the linear adjustment screw, the connecting wire and the zero-point adjustment screw, so that the sensor can adapt to the high-humidity and high-temperature use environment of the electric pressure cooker, and the installation volume is small and the cost is low. At the same time, the detection accuracy of the sensor can be improved through linear adjustment and zero adjustment.

Description

Technical Field

[0001] The invention relates to the field of sensors, and in particular to a sensor and an electric pressure cooker. Background Art

[0002] In daily life, electric pressure cookers are a must-have appliance for almost every family. As people's lives are getting better and better, people's requirements for quality of life are getting higher and higher, and people's requirements for electric pressure cookers are also getting higher and higher. People are no longer satisfied with the practice of using the "constant pressure" method to cook food in electric pressure cookers, and hope to cook more delicious food. However, in order to cook delicious food, it is necessary to strictly control the cooking pressure, especially in the current big data era. People are also studying what kind of pressure curve can cook more delicious food, that is, it is necessary to detect the pressure of the electric pressure cooker in real time and adjust the pressure of the electric pressure cooker in real time.

[0003] However, the high temperature and high humidity environment of electric pressure cookers places more stringent requirements on pressure sensors. Ordinary pressure sensors cannot accurately detect pressure in such a high temperature and high humidity environment. Although specific pressure sensors can adapt to the high temperature and high humidity environment, on the one hand, they are not small enough, which leads to problems such as difficulty in assembly and installation. On the other hand, they are expensive and the cost is soaring, making them unable to be produced and applied in large quantities. As for the measurement method that uses displacement sensors to convert into pressure values, the measured values ​​are often inaccurate. When the pressure of the electric pressure cooker is converted into diaphragm thrust, it is easy for the force to be not proportional to the actual thrust, resulting in the inability to accurately measure the pressure value. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a sensor and an electric pressure cooker, wherein the sensor can adapt to the high humidity and high temperature operating environment of the electric pressure cooker, and has a small installation volume and low cost. At the same time, the detection accuracy of the sensor can be improved through linear adjustment and zeroing.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A sensor is installed on the lid of an electric pressure cooker, and is characterized by comprising:

[0007] case;

[0008] An inductor component, the inductor component is accommodated in the housing;

[0009] A push rod, one end of which is connected to the inductor assembly, and the other end of which is provided with a fixing area;

[0010] A constant damping diaphragm, the edge of which is fixed to the shell, a fixing portion is provided on the constant damping diaphragm, the fixing portion is fixed to the fixing area, the constant damping diaphragm is used to be set toward the inner pot of the electric pressure cooker, and the fixing portion is used to push up the fixing area.

[0011] In one of the embodiments, the constant damping diaphragm is provided with a film ring around the fixing portion.

[0012] In one embodiment, the fixing portion is bonded to the fixing area so that the fixing portion is fixed to the fixing area.

[0013] In one embodiment, the fixing area is a groove, the fixing portion is a convex column, and the convex column is embedded in the groove.

[0014] In one embodiment, the sensor also includes a linear adjustment screw and a connecting wire, the shell includes an outer shell, a cover and a metal sleeve, one end of the outer shell is sealed and buckled together with the cover, and the other end of the outer shell and the metal sleeve are injection molded as a whole, a wiring port is provided at the buckling position of the outer shell and the cover, the connecting wire is passed through the wiring port, the wiring port is filled with a first curing sealant, the cover is provided with an installation port, the linear adjustment screw is passed through the installation port, and the linear adjustment screw is connected to the inductor component, and the installation port is provided with a second curing sealant.

[0015] In one of the embodiments, the shell is provided with a boss, and the boss is used to be clamped on the lid of the electric pressure cooker.

[0016] In one embodiment, the inductor assembly includes a reset elastic member, a magnetic core, a coil and a PCB, the magnetic core is respectively connected to one end of the push rod and the moving end of the reset elastic member, the coil is arranged in the shell, the coil is coupled to the magnetic core, and the coil is electrically connected to the PCB.

[0017] In one of the embodiments, the sensor further comprises a zero-point adjustment screw, wherein the zero-point adjustment screw is threadedly engaged with the inductor assembly, and the zero-point adjustment screw is used to adjust the position of the zero-point adjustment screw in the inductor assembly.

[0018] In one of the embodiments, the linear adjustment screw is threadedly engaged with the inductor assembly, and the linear adjustment screw is used to be connected to the fixed end of the reset elastic member.

[0019] In one of the embodiments, an electric pressure cooker includes any of the above-mentioned sensors, and also includes: a pot cover, an inner pot, a cleaning cover and a base, wherein the inner pot is arranged in the base, the pot cover is buckled with the base, the shell is passed through and fixed on the pot cover, the cleaning cover is detachably installed on the pot cover, and the cleaning cover is used to shield the constant damping diaphragm.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] A sensor and an electric pressure cooker. The sensor is provided with a shell, an inductor component, a push rod, a constant damping diaphragm, a linear adjustment screw, a connecting line and a zero-point adjustment screw, so that the sensor can be applied to the use environment of the electric pressure cooker with high humidity, high temperature and high sanitation requirements, and is also easy to clean, and can meet the installation requirements of most electric pressure cookers. At the same time, the sensor can perform linear adjustment and zero-point adjustment, ensuring the detection accuracy of the sensor and achieving zero adjustment. The electric pressure cooker equipped with the above-mentioned sensor can realize accurate detection of the steam pressure in the inner pot, and the above-mentioned sensor is not easy to adhere to food residues. Even if food residues are adhered, it is easy to clean. That is, the electric pressure cooker using the above-mentioned sensor can realize accurate detection of the steam pressure in the electric pressure cooker while greatly saving costs without affecting the use of the current electric pressure cooker. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic structural diagram of a sensor and an electric pressure cooker according to one embodiment of the present invention;

[0024] Figure 2 for Figure 1 The sensor shown and the schematic diagram of the assembly structure of the pressure cooker sensor;

[0025] Figure 3 for Figure 1 The sensor shown and the detailed structural diagram of the pressure cooker sensor;

[0026] Figure 4 for Figure 3 A schematic structural diagram of a housing of the sensor shown;

[0027] Figure 5 for Figure 4A schematic diagram of the structure of the wiring port of the housing shown;

[0028] Figure 6 for Figure 4 A schematic structural diagram of a boss of a shell shown;

[0029] Figure 7 for Figure 3 The schematic diagram of the structure of the inductor component, push rod and zero adjustment screw of the sensor shown;

[0030] Figure 8 for Figure 3 A schematic cross-sectional view of the constant damping diaphragm and push rod of the sensor shown;

[0031] Fig. 9 for Figure 3 A schematic diagram of the structure of the working principle of the magnetic core and coil of the sensor shown;

[0032] Fig.10 for Figure 3 A schematic diagram of the installation structure of the sensor shown in FIG. 1 with the coil of the sensor changing its position relative to the magnetic core;

[0033] Fig.11 for Figure 3 A schematic diagram of the installation structure of the sensor shown in FIG. 1 with the magnetic core of the sensor changing its position relative to the coil;

[0034] Fig.12 for Figure 1 The structural schematic diagram of the sensor and the installation position of the electric pressure cooker is shown. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] It should be noted that the expressions used herein regarding an element being “connected” to another element also mean that an element is “communicated” to another element, and fluids can be exchanged and communicated between the two elements.

[0039] In one embodiment, a sensor and an electric pressure cooker include: a sensor and an electric pressure cooker using the sensor, wherein the sensor includes: a housing, an inductance component, a push rod, a constant damping diaphragm, a linear adjustment screw, a connecting wire and a zero adjustment screw, the housing includes a shell, a cover, a metal sleeve and a sealing ring, the inductance component includes a reset elastic member, a magnetic core, a coil, a wire rack, a fixing sleeve and a PCB, the constant damping diaphragm is used to directly contact the pressure environment and transmit the detected pressure to the push rod, the push rod is used to transmit the pressure transmitted from the constant damping diaphragm to the inductance component, and the inductance component is used to convert the pressure The sensor is converted into a corresponding electrical quantity signal, the connecting wire is used to transmit the electrical quantity signal to a system receiving the electrical quantity signal, the linear adjustment screw is used to adjust the detection accuracy of the sensor, the zero point adjustment screw is used to adjust the zero point position of the sensor, and the housing is used to seal and accommodate the inductor component, the push rod, the constant damping diaphragm, the linear adjustment screw, the connecting wire and the zero point adjustment screw. The sensor of the present application is provided with the housing, the inductor component, the push rod, the constant damping diaphragm, the linear adjustment screw, the connecting wire and the zero point adjustment screw, so that the sensor can be applied to the high humidity, high temperature and high hygiene requirements of the electric pressure cooker. Moreover, since the constant damping diaphragm is made of food-grade, high temperature and high humidity resistant materials, the sensor can directly expose the detection part to the steam environment of the electric pressure cooker, and it is easy to clean, which can meet the installation requirements of the electric pressure cooker for daily use. At the same time, the sensor can perform linear adjustment and zero point adjustment to ensure the detection accuracy and zero point adjustment of the sensor. Further, the electric pressure cooker using the above sensor includes: a pot cover, an inner pot, a cleaning cover and a base, the base is used to accommodate the inner pot, the pot cover and the inner pot form a closed space, and the pot cover is used to install the above sensor, and the cleaning cover is used to isolate the food residue in the inner pot, so that only the steam pressure and extremely fine residue can reach the detection part of the above sensor. In this way, the electric pressure cooker equipped with the above sensor can realize accurate detection of the steam pressure in the inner pot, and the above sensor is not easy to adhere to food residues, and it is easy to clean even if there are food residues. That is, the electric pressure cooker provided with the above sensor can realize accurate detection of the steam pressure in the electric pressure cooker without affecting the current use of the electric pressure cooker, and since the above sensor is easy to install, it can also greatly save costs.

[0040] In order to better explain the sensor and electric pressure cooker of the present application and to better understand the concept of the sensor and electric pressure cooker, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 8A sensor and an electric pressure cooker include a sensor 10 and an electric pressure cooker 20 on which the sensor 10 is installed. The sensor 10 is used to perform pressure detection on the electric pressure cooker 20. The sensor 10 includes: a shell 100, an inductance component 200, a push rod 300 and a constant damping diaphragm 400. The shell 100 is used to be installed on the electric pressure cooker 20. The inductance component 200 is accommodated in the shell 100. One end of the push rod 300 is connected to the inductance component 200. The other end of the push rod 300 is provided with a fixing area 310. An edge 410 of the constant damping diaphragm 400 is fixed to the shell 100. The constant damping diaphragm 400 is provided with a fixing portion 420. The fixing portion 420 is fixed to the fixing area 310. The constant damping diaphragm 400 is used to be set toward the inner pot of the electric pressure cooker. The fixing portion 420 is used to push the fixing area 310.

[0041] It should be noted that the interior of the housing 100 is a cavity, and the bottom of the housing 100 is a through-hole structure. The constant damping diaphragm 400 is connected to the housing 100, so that the cavity inside the housing 100 becomes a completely sealed cavity. The inductor component 200 and the push rod 300 are both installed in the housing 100. Since the constant damping diaphragm 400 is used to be arranged toward the inner pot of the electric pressure cooker 20, when the air pressure in the inner pot of the electric pressure cooker 20 increases, the pressure will act on the constant damping diaphragm 400. When the membrane 400 is subjected to pressure, the constant damping diaphragm 400 will push the fixed area 310 fixed to the fixed part 420. Since the fixed area 310 is subjected to force, the push rod 300 will be subjected to thrust. In this way, the pressure in the electric pressure cooker 20 can be converted into the mechanical movement of the push rod 300. The movement of the push rod 300 can change the inductance of the inductor component 200. In this way, the pressure of the electric pressure cooker 20 can be finally converted into an electrical signal, so that the pressure data of the electric pressure cooker 20 can be collected.

[0042] See also Figure 4The shell 100 includes a shell 110, a cover 120 and a metal sleeve 130. The shell 100 also includes a sealing ring 140. One end of the shell 110 is sealed and buckled with the cover 120, which means that the shell 110 and the cover 120 are welded together by ultrasonic welding or hot melt welding, so that the shell 110 and the cover 120 are completely sealed. The other end of the shell 110 and the metal sleeve 130 are integrally injection molded, so that the shell 110 and the metal sleeve 130 can be sealed and connected together. Further, the shell 110 is provided with a sealing bearing layer 111 and a sealing port 112, and the metal sleeve 130 is provided with a positioning edge 131, a limiting hole 132, an outer side surface 133 of a sealing column and an inner side surface 134 of a sealing column. The metal sleeve 130 is penetrated on the sealing port 112 so that The sealing bearing layer 111 is tightly fitted with the positioning edge 131, and the positioning edge 131 is also used to strengthen the shell strength during integral molding. The limiting hole 132 is used to ensure that the metal sleeve 130 and the shell 110 are integrally molded so that the metal sleeve will not loosen or rotate during long-term use. The outer side surface 133 of the sealing column is integrated with the shell 110 and is completely fitted with the sealing plane of the shell 110. A wiring port 150 is provided at the buckling position of the shell 110 and the cover 120. The cover 120 is provided with an installation port 160. The sealing ring 140 is sleeved on the outer side surface 133 of the sealing column. The sealing ring 140 is used to eliminate the gap between the metal sleeve 130 and the installation position of the electric pressure cooker 20 to prevent the electric pressure cooker 20 from causing poor air tightness at the location where the sensor 10 is installed, thereby ensuring the sealing of the sensor 10 use environment.

[0043] See also Figure 5 The wiring port 150 is used to pass the connecting wire 600, and the connecting wire 600 is used to transmit the pressure data detected by the inductor component 200 to the control system of the electric pressure cooker 20. In order to facilitate the installation and removal of the sensor, a plug-in terminal 610 is set at the wiring port 150, so that the connecting wire 600 connected to the electric pressure cooker 20 can be separated from the connecting wire 600 of the sensor 10 by plugging and unplugging. By using the plug-in terminal 610 for connection, it is convenient for the installation and removal of the sensor 10. In addition, the pressure value detected in the inductor component 200 can also be directly transmitted to the control system of the electric pressure cooker 20 by a continuous wiring method.

[0044] Please refer again Figure 2 and Figure 4 The housing 110 is provided with a boss 113, and the boss 113 is used to be clamped on the pot cover of the electric pressure cooker 20. The sensor 10 is used to be clamped on the pot cover of the electric pressure cooker 20, and in fact, the sensor 10 is fixed on the pot cover of the electric pressure cooker 20 through the boss 113.

[0045] Please refer again Figure 3The housing 110 is also provided with an inductor clamping position 114, which is used to clamp the inductor component 200 so that the inductor component 200 and the housing 100 are fixed as a whole. In this way, it is possible to prevent a gap between the inductor component 200 and the housing 100, which affects the detection accuracy of the sensor 10.

[0046] See also Figure 6 The boss 113 is provided with a locking hole 113a, and the locking hole 113a is used to penetrate a screw. In this way, the sensor 10 can be locked and fixed to the electric pressure cooker 20 using the screw. Locking the sensor 10 using the screw can enhance the installation strength of the sensor 10.

[0047] See also Figure 3 and Figure 7 The inductor assembly 200 includes a reset elastic member 210, a magnetic core 220, a coil 230 and a PCB 240. The magnetic core 220 is respectively connected to one end of the push rod 300 and the moving end of the reset elastic member 210. The coil 230 is arranged in the housing 100. The magnetic core 220 and the coil 230 are coupled, and the coil 230 is electrically connected to the PCB 240.

[0048] It should be noted that the reset elastic member 210 is used to support the magnetic core 220 connected to the reset elastic member 210. When the pressure of the inner pot of the electric pressure cooker 20 acts on the push rod 300 from the constant damping diaphragm 400, the push rod 300 will transfer the pressure transmitted from the inner pot of the electric pressure cooker 20 to the magnetic core 220 connected to one end of the push rod 300, so that the magnetic core 220 is subjected to the pressure of the inner pot of the electric pressure cooker 20 and is displaced toward the reset elastic member 210. The reset elastic member 210 is in a compressed state at this time. In this way, the relative position of the magnetic core 220 and the coil 230 changes. Since the magnetic core 220 and the coil 230 use the principle of geomagnetic induction, and the coil 230 is electrically connected to the PCB 240, the corresponding electric quantity of the PCB 240 changes. In this way, the pressure on the inner pot of the electric pressure cooker 20 can be converted into The function of converting the pressure into an electrical signal is as follows: since the free end of the reset elastic member 210 supports the magnetic core 220, when the pressure in the inner pot of the electric pressure cooker 20 is reduced, the reset elastic member 210 in the compressed state will be restored to a natural state due to its own elastic force due to the reduction of the pressure received, and the magnetic core 220 connected to the free end of the reset elastic member 210 will be restored to the original position under the elastic force of the reset elastic member 210, and the relative position of the magnetic core 220 and the coil 230 will also be restored to the original state. In this way, under the pressure of the inner pot of the electric pressure cooker 20, the constant damping diaphragm 400, the push rod 300, the reset elastic member 210, the magnetic core 220, the coil 230 and the PCB 240 can be provided to convert the pressure into an electrical signal, thereby achieving the purpose of detecting the air pressure in the electric pressure cooker 20.

[0049] In one embodiment, the magnetic core 220 is connected to one end of the reset elastic member 210 and is provided with an elastic member positioning step for clamping the reset elastic member 210 so that the reset elastic member 210 can be fixed to one end of the magnetic core 220 .

[0050] Please refer again Figure 7 The inductor assembly 200 further includes a wire rack 250 and a fixing sleeve 260. The wire rack 250 has a through hole in the middle, and a linear adjustment thread 251 and a zero adjustment thread 252 are arranged at one end of the through hole. A sealing groove 253 and a limiting groove 254 are provided at one end of the wire rack 250 away from the linear adjustment thread 251. The fixing sleeve 260 is provided with a clamping position 261 and a limiting step 262. The coil 230 is arranged in the middle of the wire rack 250, and the PCB 240 is arranged on one side of the wire rack 250. The magnetic core 220 and the push rod 300 are placed in the through hole in sequence, and then the fixing sleeve 260 is placed. The clamping position 261 is used to The push rod 300 is welded or fused together with the wire rack 250 to prevent the push rod 300 from falling out of the wire rack 250. Furthermore, the push rod 300 is provided with a limiting edge 320. The push rod 300 is connected to the magnetic core 220 by welding or fusion as a whole. The push rod 300 is inserted into the fixed sleeve 260. By limiting the limiting edge 320 by the limiting step 262, the whole connected by the push rod 300 and the magnetic core 220 can be fixed in the fixed sleeve 260. In fact, the whole connected by the push rod 300 and the magnetic core 220 can have a certain moving space in the fixed sleeve 260, but cannot fall out.

[0051] Please refer again Figure 3 The wire rack 250 is also provided with an inductor clamping platform 255, which is clamped together with the inductor clamping position 114, and then the inductor assembly 200 and the housing 100 are fixed together by welding or fusion.

[0052] In one embodiment, the magnetic core 220 is sleeved on the push rod 300, and then the magnetic core 220 and the push rod 300 are fixed as a whole by welding or melting. One end of the push rod 300 is connected to the moving end of the reset elastic member 210, and the other end of the push rod 300 is connected to the constant damping diaphragm 400. In this way, when the constant damping diaphragm 400 is subjected to pressure, the push rod 300 connected to the constant damping diaphragm 400 is pushed. Since the magnetic core 220 is sleeved on the push rod 300, the magnetic core 220 is pushed to move.

[0053] Please refer again Figure 8The constant damping diaphragm 400 is provided with a film ring 430 around the fixing portion 420. The constant damping diaphragm 400 is also provided with a sealing protrusion 440 and a positioning protrusion 450. The sealing protrusion 440 is tightly fitted with the sealing groove 253, and the positioning protrusion 450 is tightly fitted with the limiting groove 254. In this way, the constant damping diaphragm 400 can be assembled to the inductor component 200. Since the film ring 430 is designed to be a very thin film, and since the bottom of the fixing portion 420 is designed to be thicker and fits with the end face of the fixing area 310, the edge 410 fits with the inner side surface 134 of the sealing column. Therefore, when the constant damping diaphragm 400 is subjected to the pressure of the electric pressure cooker 20, actually only the film ring 430 is deformed, and since the film ring 430 is very thin, within a certain range, the constant damping diaphragm 400 is in a constant damping state, that is, the pressure of the inner pot of the electric pressure cooker 20 can be completely exerted on the fixed area 310 fixed to the fixed part 420 through the constant damping diaphragm 400, so that the pressure can be transmitted to the push rod 300 without loss, so that the first step of the pressure detection of the electric pressure cooker 20 can be completed.

[0054] In one embodiment, the fixing portion 420 is bonded to the fixing area 310 so that the fixing portion 420 is fixed to the fixing area 310. In this way, when the constant damping diaphragm 400 is subjected to pressure, the pressure can be completely transferred to the push rod through the fixing area 310 bonded to the fixing portion 420 without causing pressure loss in the fixing portion 420 and the fixing area 310, thereby improving the accuracy of the sensor 10 in detecting pressure.

[0055] Please refer again Figure 8 The fixing area 310 is a groove, and the fixing part 420 is a convex column, which is embedded in the groove. Since the fixing area 310 and the fixing part 420 need to be fixed without slipping, the embedding method can achieve a good fixing effect. Moreover, the edge surface of the groove supports the bottom of the convex column. When pressure acts on the constant damping diaphragm 400, the deformation of the diaphragm will be blocked at the edges of the film ring 430 and the push rod 300 and at the edges of the film ring 430 and the metal sleeve 130 respectively. Finally, only the film ring 430 is deformed.

[0056] In one embodiment, the constant damping diaphragm 400 and the metal sleeve 130 are made of food-grade materials and are resistant to high temperature and high humidity. Therefore, the constant damping diaphragm 400 and the metal sleeve 130 can directly contact the pressure area in the electric pressure cooker 20 and accurately detect the pressure in the electric pressure cooker 20.

[0057] Please refer again Figure 3The sensor 10 also includes a linear adjustment screw 500 and a connecting wire 600. The connecting wire 600 passes through the wiring port 150. The wiring port 150 is filled with a first curing sealant. The first curing sealant is used to completely seal the wiring port 150. The linear adjustment screw 500 passes through the mounting port 160, and the linear adjustment screw 500 is connected to the inductor component 200. The mounting port 160 is provided with a second curing sealant. In one embodiment, the linear adjustment screw 500 is screwed with the inductor component 200, and the linear adjustment screw 500 is used to be connected to the fixed end of the reset elastic member 210.

[0058] It should be noted that the linear adjustment screw 500 is screwed with the inductor component 200, which is screwed with the wire frame 250. By turning the linear adjustment screw 500, the linear adjustment screw 500 can be moved. Since the linear adjustment screw 500 is connected to the fixed end of the reset elastic member 210, when the linear adjustment screw 500 moves close to the fixed end, it actually applies a thrust to the fixed end, which compresses the reset elastic member 210. The elastic deformation of the reset elastic member 210 increases, which means that the elastic force of the reset elastic member 210 increases. If the elastic force of the reset elastic member 210 increases, when the same pressure acts on the constant damping diaphragm 400, and then acts on the magnetic core 220 fixed to the constant damping diaphragm 400, the displacement of the magnetic core 220 will decrease, which is ultimately reflected in the reduction of the electrical signal of the coil 230. That is, by adjusting The linear adjustment screw 500 can adjust the inductance of the coil 230 per Pascal pressure. Therefore, by adjusting the linear adjustment screw 500, the sensor 10 can convert each Pascal pressure in the electric pressure cooker 20 into a corresponding inductance in real time, that is, the output value of the debugging point can be easily changed. In this way, the pressure of the electric pressure cooker 20 can be accurately detected. After the PCB 240 detects the pressure of the electric pressure cooker 20, it will transmit the pressure data to the control system of the electric pressure cooker 20 through the connecting line 600. After adjusting the linear adjustment screw 500, the wiring port 150 is completely sealed with the first curing sealant, and the installation port 160 is sealed with the second curing sealant. In this way, the sensor 10 can form a sealed structure, so that the sensor 10 can adapt to the use environment of high humidity and high temperature.

[0059] Please refer again Figure 3 The sensor 10 further includes a zero-point adjustment screw 700 , which is threadedly engaged with the inductor assembly 200 , and is actually threadedly engaged with the wire rack 250 . The zero-point adjustment screw 700 is used to adjust the position of the zero-point adjustment screw in the inductor assembly 200 .

[0060] It should be noted that, after the inductor assembly 200 is installed in the shell 100, the zero-point adjustment screw 700 is passed through the installation opening 160 and screwed into the inductor assembly 200. In fact, the zero-point adjustment screw 700 is screwed into the wire rack 250. In this way, when the zero-point adjustment screw 700 is turned, the position of the zero-point adjustment screw 700 relative to the wire rack 250 can be adjusted, thereby changing the inductance of the coil 230, so that the zero-point output of the sensor 10 can be consistent and accurate, thereby ensuring that the sensor 10 has no residual pressure in the electric pressure cooker 20 after the pressure cooker 20 is exhausted, thereby ensuring that the lid of the electric pressure cooker 20 is opened smoothly and safely.

[0061] Please participate Fig. 9 The inductance of the coil 230 is changed by the zero-point adjustment screw 700. In addition to using the material characteristics of the zero-point adjustment screw 700 to change the inductance of the coil 230, the inductance of the coil 230 can also be changed by changing the initial relative position of the magnetic core 220 and the coil 230. Specifically, when the sensor 10 is in a natural state, the displacement of the coil 230 relative to the magnetic core 220 can be adjusted, and the displacement of the magnetic core 220 relative to the coil 230 can also be adjusted. After confirming the zero-point output, a pressure F is applied to the sensor 10 to cause a relative displacement of the magnetic core 220, and then the linear adjustment screw 500 is adjusted to match the elastic force of the reset elastic member 210 with the pressure F, thereby adjusting the output linearity of the product.

[0062] See also Fig.10, which is a method for adjusting the zero-point output of the coil 230 relative to the magnetic core 220. The zero-point adjustment screw 700 is screwed with the housing 100, and the bottom of the zero-point adjustment screw 700 is connected to the wire rack 250. The bottom of the zero-point adjustment screw 700 is provided with a zero-point adjustment clamping platform, and the top of the wire rack 250 is provided with a zero-point adjustment buckle position. The zero-point adjustment clamping platform and the zero-point adjustment buckle position are buckled together to realize the connection between the zero-point adjustment screw 700 and the wire rack 250. When the zero-point adjustment screw 700 is turned, the zero-point adjustment screw 700 pushes the wire rack 250 connected to the zero-point adjustment screw 700. Since the coil 230 is wound on the wire rack 250, the zero-point adjustment screw 700 can adjust the position of the coil 250. In this way, the relative position of the magnetic core 220 and the coil 230 can be adjusted, thereby controlling the zero-point output of the sensor 10. After the zero-point adjustment screw 700 is adjusted, the linear adjustment screw 500 can be turned to realize Adjust the linear output of the sensor 100. Specifically, when the linear adjustment screw 500 is turned, the linear adjustment screw 500 will push the reset elastic member 210 connected to the linear adjustment screw 500. Since the magnetic core 220 connected to one end of the reset elastic member 210 is held immovably by the push rod 300, the reset elastic member 210 is compressed, and the magnetic core 220 connected to one end of the reset elastic member 210 is changed by the elastic force of the reset elastic member 210. In this way, the moving distance of the magnetic core under each Pascal pressure applied to the constant damping diaphragm 400 can be changed, that is, the linear relationship of the sensor 10 is changed. At this time, by providing a specified pressure to the constant damping diaphragm 400 and then adjusting the linear adjustment screw 500 so that the value detected by the sensor 10 is consistent with the given pressure value, the linear adjustment of the sensor 10 is achieved, so that the sensor 10 can accurately detect the pressure.

[0063] See also Fig.11, which is a method for adjusting the zero-point output by displacing the magnetic core 220 relative to the coil 230. The zero-point adjustment screw 700 is screwed with the housing 100, and the zero-point adjustment screw 700 is connected to the magnetic core 220. When the zero-point adjustment screw 700 is turned, the magnetic core 220 connected to the zero-point adjustment screw 700 can be driven to move. Since the wire frame 250 is fixed to the housing 100, the relative position of the magnetic core 220 and the wire frame 250 can be changed. Since the coil 230 is fixed on the wire frame 250, the relative position of the magnetic core 220 and the coil 230 can be changed to achieve zero-point adjustment of the sensor 10. After the zero-point adjustment is completed, the linear adjustment screw 500 is then turned. In this way, the linear adjustment screw 50 0 will push the reset elastic member 210 connected to the linear adjustment screw 500. Since the magnetic core 220 connected to one end of the reset elastic member 210 is held immovably by the push rod 300, the reset elastic member 210 is compressed, and the magnetic core 220 connected to one end of the reset elastic member 210 is changed by the elastic force of the reset elastic member 210. In this way, the linear relationship of the sensor 10 can be changed. By giving a specified pressure to the constant damping film 400 at the detection end of the sensor, and then adjusting the linear adjustment screw 500 so that the value detected by the sensor 10 is consistent with the given pressure value, the linear adjustment of the sensor 10 is realized, so that the sensor 10 can accurately detect the pressure.

[0064] In one embodiment, the resetting elastic member 210 is a spring, and the elastic deformation and recovery of the spring are utilized to realize the pushing effect on the magnetic core 220 .

[0065] In one embodiment, the first curing sealant and the second curing sealant are sealing glue, which are used to seal the wiring port 150 and the installation port 160 respectively. Specifically, after the inductor component 200, the push rod 300, the constant damping diaphragm 400, the linear adjustment screw 500, the connecting wire 600 and the zero point adjustment screw 700 are installed and adjusted, the sealing glue is poured into the wiring port 150 and the installation port 160 of the shell 100. In this way, a completely sealed sensor 10 can be obtained.

[0066] See also Figure 1 and Fig.12 An electric pressure cooker 20 includes the above-mentioned sensor 10, and also includes: a pot cover 21, an inner pot 22, a cleaning cover 23 and a base 24, the inner pot 22 is arranged in the base 24, the pot cover 21 and the base 24 are buckled, the sensor 10 is penetrated and fixed on the pot cover 21, the cleaning cover 23 is detachably installed on the pot cover 21, and the cleaning cover 23 is used to shield the constant damping diaphragm 400.

[0067] It should be noted that the sensor 10 is directly inserted into the pot cover 21 through the mounting hole, and the shell 100 is inserted and fixed on the pot cover 21, and the shell 100 is fixed by the locking hole of the boss 113, and the mounting hole is sealed with a sealing ring 140. The cleaning cover 23 is provided with a vent hole, so most of the food residues can be isolated. Even if some small food residues reach the constant damping diaphragm 400, they can be easily cleaned with clean water. Since the metal sleeve 130 and the constant damping diaphragm 400 are made of food-grade materials and are resistant to high temperature and high humidity, the metal sleeve 130 and the constant damping diaphragm 400 can be directly exposed to the steam pressure, and the shell 100 outside the pot cover 21 uses plastic components. Therefore, it can effectively isolate the temperature inside the electric pressure cooker 20 and protect the internal components.

[0068] In one embodiment, a small cleaning cover 23 is used to cover only the detection portion of the sensor 10 . The small cleaning cover 23 is provided with a vent hole, so that the constant damping diaphragm 400 can accurately detect the pressure in the electric pressure cooker 20 .

[0069] Compared with the prior art, the present invention has at least the following advantages:

[0070] A sensor and an electric pressure cooker. The sensor is provided with a shell, an inductor component, a push rod, a constant damping diaphragm, a linear adjustment screw, a connecting line and a zero-point adjustment screw, so that the sensor can be applied to the use environment of the electric pressure cooker with high humidity, high temperature and high sanitation requirements, and is easy to clean, and can meet the installation requirements of most electric pressure cookers. At the same time, the sensor can perform linear adjustment and zero-point adjustment, ensuring the detection accuracy of the sensor and achieving zero adjustment. The electric pressure cooker equipped with the above-mentioned sensor can realize accurate detection of the steam pressure in the inner pot, and the above-mentioned sensor is not easy to adhere to food residues. Even if food residues are adhered, it is easy to clean. That is, the electric pressure cooker using the above-mentioned sensor can realize accurate detection of the steam pressure in the electric pressure cooker and greatly save costs without affecting the use of the current electric pressure cooker.

[0071] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A sensor installed on the lid of an electric pressure cooker, characterized in that: include: case; An inductor component, the inductor component is accommodated in the housing; A push rod, one end of which is connected to the inductor assembly, and the other end of which is provided with a fixing area; A constant damping diaphragm, the edge of which is fixed to the shell, a fixing portion is provided on the constant damping diaphragm, the fixing portion is fixed to the fixing area, the constant damping diaphragm is used to be arranged toward the inner pot of the electric pressure cooker, and the fixing portion is used to push up the fixing area; The inductor assembly includes a reset elastic member, a magnetic core, a coil and a PCB, wherein the magnetic core is respectively connected to one end of the push rod and the moving end of the reset elastic member, the coil is arranged in the housing, the coil is coupled to the magnetic core, and the coil is electrically connected to the PCB; the inductor assembly also includes a wire frame and a fixing sleeve, the middle part of the wire frame is a through hole, one end of the through hole is provided with a linear adjustment thread and a zero point adjustment thread, the end of the wire frame away from the linear adjustment thread is provided with a sealing groove and a limiting groove, the fixing sleeve is provided with a locking and limiting step, the coil is arranged in the middle of the wire frame, and the PCB is arranged on one side of the wire frame; The constant damping diaphragm is provided with a film ring around the fixing portion; the constant damping diaphragm is also provided with a sealing convex portion and a positioning convex portion, the sealing convex portion is tightly fitted with the sealing groove, and the positioning convex portion is tightly fitted with the limiting groove.

2. The sensor according to claim 1, characterized in that The fixing portion is bonded to the fixing area so that the fixing portion is fixed to the fixing area.

3. The sensor according to claim 1, characterized in that The fixing area is a groove, the fixing portion is a convex column, and the convex column is embedded in the groove.

4. The sensor according to claim 1, characterized in that The sensor also includes a linear adjustment screw and a connecting wire. The shell includes an outer shell, a cover and a metal sleeve. One end of the outer shell is sealed and buckled with the cover, and the other end of the outer shell and the metal sleeve are integrally injection molded. A wiring port is provided at the buckling position of the outer shell and the cover, and the connecting wire passes through the wiring port. The wiring port is filled with a first curing sealant. The cover is provided with an installation port, and the linear adjustment screw passes through the installation port. The linear adjustment screw is connected to the inductor component, and the installation port is provided with a second curing sealant.

5. The sensor according to claim 4, characterized in that The shell is provided with a boss, and the boss is used for being clamped on the pot cover of the electric pressure cooker.

6. The sensor according to claim 1, characterized in that The sensor further comprises a zero-point adjustment screw, wherein the zero-point adjustment screw is threadedly engaged with the inductance component, and the zero-point adjustment screw is used to adjust the position of the zero-point adjustment screw in the inductance component.

7. The sensor according to claim 4, characterized in that The linear adjustment screw is threadedly engaged with the inductor assembly, and the linear adjustment screw is used to be connected to the fixed end of the reset elastic member.

8. An electric pressure cooker, characterized in that: The sensor comprises any one of claims 1 to 7, and further comprises: a pot cover, an inner pot, a cleaning cover and a base, wherein the inner pot is arranged in the base, the pot cover is buckled with the base, the shell is passed through and fixed on the pot cover, the cleaning cover is detachably installed on the pot cover, and the cleaning cover is used to shield the constant damping diaphragm.

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