A novel pressure sensor for electric pressure cooker and electric pressure cooker thereof

Abstract

The present invention relates to the field of sensor technology, and in particular to a novel pressure sensor for an electric pressure cooker and an electric pressure cooker thereof, which comprises: a main body seat, an inner cavity body is arranged in the main body seat, an elastic member is arranged in the inner cavity body, the bottom end of the elastic member is abutted against the bottom of the inner cavity body, and the top end of the elastic member is abutted against the bottom of a detection head; a magnetic ring is arranged on the outer ring of the detection head; an upper cover is arranged at the top opening of the inner cavity body, and a through hole is arranged in the upper cover, and the top of the detection head passes through the through hole of the upper cover; a coil is arranged on the outer side of the inner cavity body, and the coil is connected to a circuit; the present invention accurately obtains the real-time pressure value of the pressure cooker according to the displacement relationship between the pressure value of the electric pressure cooker and the heating plate, which can not only improve the safety of the electric pressure cooker, but also realize automatic pressure adjustment according to the pressure value required for cooking different foods, so as to cook more delicious and tasty food.

Description

Technical Field

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

[0002] Electric pressure cookers are a common type of kitchen cooker on the market. They use the physical phenomenon that the boiling point of liquids increases under higher pressure to apply pressure to water, so that the water can reach a higher temperature without boiling, thereby speeding up the efficiency of stewing food. Each electric pressure cooker has a maximum internal pressure value that it can withstand. When the internal pressure exceeds the maximum pressure value, an explosion accident is likely to occur. In addition, nowadays, families require electric pressure cookers to cook more delicious food, so electric pressure cookers need to have more accurate pressure detection and control to make more delicious food. However, the heating plate electric pressure cookers on the market today generally only have mechanical pressure switches. The pressure switch is disconnected only when the pressure exceeds the set limit, and the pressure of the electric pressure cooker cannot be detected in real time, which affects the taste of the delicious food being cooked. In serious cases, it may even pose a safety hazard. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the object of the present invention is to provide a new type of pressure sensor and an electric pressure cooker having the new type of pressure sensor.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] The present invention is a novel pressure sensor for an electric pressure cooker, comprising: a main body seat, an inner cavity body is arranged in the main body seat, an elastic member is arranged in the inner cavity body, the bottom end of the elastic member is in contact with the bottom of the inner cavity body, and the top end of the elastic member is in contact with the bottom of a detection head; a magnetic ring is arranged on the detection head; an upper cover is arranged at the top opening of the inner cavity body, and a through hole is arranged in the upper cover; the top of the detection head passes through the through hole of the upper cover; a coil is arranged on the outer side of the main body seat, and the coil is connected to a circuit.

[0006] Furthermore, the pressure sensor for the electric pressure cooker also includes a fixing frame, which is installed on the outer pot body of the pressure cooker and is provided with a positioning cavity, and the main body seat is arranged in the positioning cavity.

[0007] Furthermore, a screw hole is provided on the bottom end surface of the positioning cavity, an adjusting screw matched with the screw hole through a thread is provided in the screw hole, a positioning hole is provided on the top of the adjusting screw, a downwardly protruding buckle is provided on the outer surface of the bottom of the main body seat, and the buckle is connected to the positioning hole and snapped.

[0008] Furthermore, the bottom surface of the adjusting screw is provided with an inwardly recessed adjusting socket.

[0009] Furthermore, an outer surface of the upper portion of the main body seat is provided with an external thread, and an inner side of the upper cover is provided with an internal thread matching the external thread.

[0010] Furthermore, the main body seat is provided with a wiring piece connected to the coil, and the side of the fixing frame is provided with a slot body for the wiring piece to pass through, and the wiring piece is connected to the measuring circuit after passing through the slot body.

[0011] Furthermore, the elastic member is a spring; a lower positioning column protruding upward is provided at the bottom of the inner cavity, a spring accommodating cavity is provided at the bottom of the detection head, an upper positioning column protruding downward is provided on the bottom of the spring accommodating cavity, and the upper and lower ends of the spring are respectively mounted on the upper positioning column and the lower positioning column.

[0012] Furthermore, the main body seat is provided with a mounting bracket, through which the main body seat is mounted on the outer pot body of the electric pressure cooker.

[0013] Furthermore, there is at least one mounting bracket located on the side of the main body seat, and the mounting bracket is integrally formed with the main body seat.

[0014] The present invention discloses an electric pressure cooker with a novel pressure sensor, comprising an inner pot, an outer pot body and a heating plate, and the electric pressure cooker pressure sensor as described above, wherein the main body of the electric pressure cooker pressure sensor is installed on the outer pot body; and the top of the detection head thereof abuts against the heating plate.

[0015] The pressure sensor of the present invention is arranged on the outside of the outer pot body of the electric pressure cooker, and the detection head is in contact with the bottom of the heating plate. After the food in the inner pot is heated by the heating plate, the internal pressure continues to increase, and the inner pot is squeezed downward. Since the inner pot is placed on the heating plate, this also causes the heating plate to move downward. The greater the pressure, the greater the displacement. The moving distance detected by the sensor can be used to obtain the real-time pressure value in the pot according to the corresponding relationship between the pressure of the electric pressure cooker and the displacement distance of the heating plate. The pressure sensor can replace the pressure switch of the heating plate type electric pressure cooker, and can accurately obtain the real-time pressure value of the pressure cooker according to the relationship between the pressure value of the electric pressure cooker and the displacement of the heating plate. Not only can the safety of the electric pressure cooker be improved, but also the pressure can be automatically adjusted according to the pressure value required for cooking different foods, so as to cook more delicious and tasty food. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] For ease of explanation, the present invention is described in detail with reference to the following preferred embodiments and the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the exploded structure of the first embodiment of the pressure sensor for an electric pressure cooker of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the pressure sensor for a medium-voltage pressure cooker.

[0019] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the pressure sensor of a medium-voltage pressure cooker without a fixing frame.

[0020] Figure 4 for Figure 1 Schematic diagram of the assembly relationship in the pressure sensor of a medium-voltage pressure cooker.

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the electric pressure cooker of the present invention.

[0022] Figure 6 This is a schematic diagram of the exploded structure of the second embodiment of the pressure sensor for an electric pressure cooker of the present invention.

[0023] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the electric pressure cooker pressure sensor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] See also Figures 1 to 4 The present invention is a novel pressure sensor for an electric pressure cooker, comprising: a body seat 6, wherein the body seat 6 is mounted on a fixing bracket 8, wherein the fixing bracket 8 is fixed on the outer side of the outer pot body; an inner cavity 63 is provided in the body seat 6, wherein an elastic member 5 is provided in the inner cavity 63, wherein the bottom end of the elastic member 5 abuts against the bottom of the inner cavity 63, and the top end of the elastic member 5 abuts against the bottom of the detection head 3; a magnetic ring 2 is provided around the outer side of the detection head 3; an upper cover 1 is provided at the top opening of the inner cavity 63, and a through hole is provided in the upper cover 1; the top of the detection head 3 passes through the through hole of the upper cover 1 and abuts against the bottom of the heating plate of the electric pressure cooker; an annular outer cavity 64 is provided around the outer side of the inner cavity 63, wherein a coil 7 is provided in the outer cavity 64, and the coil 7 is connected to a circuit.

[0026] In other embodiments, the coil 7 is directly disposed on the outer side of the inner cavity 63 , that is, as long as the coil 7 is disposed on the outer side of the inner cavity 63 , the function of the present invention can be achieved, and of course it is also within the protection scope of the present invention.

[0027] In this embodiment, the inner cavity 63 is surrounded by a bottom wall and side walls.

[0028] In other embodiments, the bottom wall of the inner cavity 63 may also be replaced by a nut, that is, an internal thread is provided on the side wall of the inner cavity 63, and the external thread of the nut cooperates with the internal thread to fix the nut to the side wall, so that the nut and the side wall surround the inner cavity 63. In other words, as long as the cavity is formed inside the main body 6, it is within the protection scope of the present invention.

[0029] Furthermore, a positioning cavity is provided in the fixing frame 8, the main body seat 6 is arranged in the positioning cavity, a screw hole is provided on the bottom end surface of the positioning cavity, an adjusting screw 9 is provided in the screw hole and matched with the adjusting screw 9 through a thread, a positioning hole 91 is provided on the top of the adjusting screw 9, a buckle 61 protruding downward is provided on the bottom outer surface of the main body seat 6, and the buckle 61 is connected to the positioning hole 91 and snapped. Rotating the screw hole will change the installation height of the main body seat 6 in the fixing frame 8. Since errors may occur in the production of the outer pot body and the heating plate, the flatness or curvature of the outer surface of each outer pot body and the heating plate may be different. By adjusting the installation height of the main body seat 6, it can be ensured that the detection head 3 can be well abutted against the bottom of different heating plates.

[0030] Furthermore, the bottom surface of the adjusting screw 9 is provided with an inwardly recessed adjusting socket 92. By inserting a tool such as a hexagonal wrench into the adjusting socket 92 and rotating it, the position of the adjusting screw 9 can be adjusted, thereby adjusting the installation height of the main body seat 6; and the adjusting socket 92 in the adjusting screw 9 is recessed inward, so that the bottom of the adjusting screw 9 does not need to be provided with a raised nut, thereby reducing the overall height of the product, which is more suitable for applications such as electric pressure cookers where the overall product volume is small.

[0031] Furthermore, an outer thread is provided on the outer side of the upper part of the main body seat 6, and an inner thread matched with the outer thread is provided on the inner side of the upper cover 1. The main body seat 6 and the upper cover 1 are matched with each other through threads, and the starting position of the magnetic ring 2 can be adjusted by rotating the upper cover 1. After the starting position of the magnetic ring 2 is adjusted, the upper cover 1 and the main body seat 6 are fixed with adhesive to complete the calibration of the starting relative position of the magnetic ring 2 and the coil 7; that is, when the upper cover 1 is adjusted, the zero position of the product can be consistent when it leaves the factory.

[0032] Furthermore, the main body seat 6 is provided with a connecting piece 4 connected to the coil 7, and the side of the fixing frame 8 is provided with a slot for the connecting piece 4 to pass through. After passing through the slot, the connecting piece 4 is connected to the measuring circuit.

[0033] Furthermore, the elastic member 5 is a spring; a lower positioning column 62 protruding upward is provided at the bottom of the inner cavity 63, a spring accommodating cavity is provided at the bottom of the detection head 3, an upper positioning column 31 protruding downward is provided on the bottom of the spring accommodating cavity, and the upper and lower ends of the spring are respectively mounted on the upper positioning column 31 and the lower positioning column 62.

[0034] Please refer to Figure 6 and Figure 7 , which is a second embodiment of the pressure sensor of the present invention. The pressure sensor of the second embodiment has substantially the same structure as the pressure sensor of the first embodiment, and can perform the same functions and achieve substantially the same beneficial effects.

[0035] The pressure sensor of the second embodiment includes a main body seat 6a, an inner cavity 63a is provided in the main body seat 6a, an elastic member 5a is provided in the inner cavity 63a, the bottom end of the elastic member 5a abuts against the bottom of the inner cavity 63a, and the top end of the elastic member 5a abuts against the bottom of the detection head 3a; the outer ring of the detection head 3a is provided with a magnetic ring 2a; an upper cover 1a is provided at the top opening of the inner cavity 63a, and a through hole is provided in the upper cover 1a; the top of the detection head 3a passes through the through hole of the upper cover 1a and abuts against the bottom of the heating plate of the electric pressure cooker; a coil 7a is provided on the outer side of the inner cavity 63a, and the coil 7a is connected to the external circuit.

[0036] In other embodiments, the coil 7 is directly disposed on the outer side of the inner cavity 63 , that is, as long as the coil 7 is disposed on the outer side of the inner cavity 63 , the function of the present invention can be achieved, and of course it is also within the protection scope of the present invention.

[0037] The pressure sensor of the second embodiment differs from the pressure sensor of the first embodiment in that the pressure sensor of the second embodiment does not include a fixing frame, but is provided with a mounting bracket 8a on the body seat 6a, and is directly mounted on the outer side of the outer pot body through the mounting bracket 8a, and the other structures are the same as the corresponding structures of the pressure sensor of the first embodiment. In this embodiment, the mounting bracket 8a is a pair and is arranged on both sides of the body seat 6a, and the cross section of each mounting bracket 8a is L-shaped.

[0038] In other embodiments, there is one mounting bracket 8a, that is, there is at least one mounting bracket 8a in this case, and it is located on the side of the main body seat 6a.

[0039] In this embodiment, the mounting bracket 8a is integrally formed with the main body seat 6a.

[0040] See also Figure 5The present invention is an electric pressure cooker with a new type of pressure sensor, comprising: an inner pot 100, an outer pot body 200 and a heating plate 300, and the electric pressure cooker pressure sensor 400 as described above, wherein the body seat 6 of the pressure sensor 400 is fixed to the outer pot body 200 through a fixing frame 8 or the body seat 6a is fixed to the outer pot body 200 through a mounting bracket 8a, that is, the body seat 6, 6a of the pressure sensor 400 is installed on the outer pot body 200; and the top of its detection head 3 is in contact with the bottom of the heating plate 300. The specific working principle of the present invention is as follows: since the top of the detection head 3 abuts against the bottom of the heating plate 300 of the electric pressure cooker, when the inner pot 100 is compressed and expanded and squeezed downward, the inner pot 100 is placed on the heating plate 300, which will also cause the heating plate 300 to move downward, and will push the detection head 3 to move downward; and the detection head 3 will drive the magnetic ring 2 on its outer side to move downward together, that is, the magnetic ring 2 will move downward relative to the inner cavity 63; since the coil 7 is fixed in the outer cavity 64, when the magnetic ring 2 moves downward, it will change the inductance entering the coil 7; the coil 7 converts the collected inductance signal into an electrical signal and transmits it to the oscillation circuit; and then it is converted into a pressure value by the measuring circuit; when the pressure of the inner pot 100 decreases, the downward displacement distance of the heating plate 300 is also reduced, and the detection head 3 will rebound under the action of the elastic member 5, so that the top of the detection head 3 is always abutted against the heating plate 300, and at the same time, the magnetic ring 2 will also move upward, thereby changing the inductance in the coil 7.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of pressure sensor for electric pressure cooker, characterized in that: The electric pressure cooker pressure sensor comprises: a body seat, an inner cavity is arranged in the body seat, the inner cavity is surrounded by a bottom wall and a side wall, an elastic member is arranged in the inner cavity, the bottom end of the elastic member is in contact with the bottom of the inner cavity, and the top end of the elastic member is in contact with the bottom of the detection head; a magnetic ring is arranged on the detection head; an upper cover is arranged at the top opening of the inner cavity, and a through hole is arranged in the upper cover; the top of the detection head passes through the through hole of the upper cover; a coil is arranged on the outer side of the body seat, and the coil is connected to the circuit; A fixing frame, the fixing frame is installed on the outer pot body of the pressure cooker and is provided with a positioning cavity, the main body seat is arranged in the positioning cavity, a screw hole is provided on the bottom end surface of the positioning cavity, an adjusting screw matched with its thread is provided in the screw hole, a positioning hole is provided on the top of the adjusting screw, a downwardly protruding buckle is provided on the outer surface of the bottom of the main body seat, and the buckle is connected to the positioning hole for clamping, and an inwardly recessed adjusting jack is provided on the bottom surface of the adjusting screw; an external thread is provided on the outer side surface of the upper part of the main body seat, and an internal thread matched with the external thread is provided on the inner side of the upper cover.

2. The novel electric pressure cooker pressure sensor according to claim 1 is characterized in that: The main body seat is provided with a connecting piece connected to the coil, and the side of the fixing frame is provided with a slot body for the connecting piece to pass through. After the connecting piece passes through the slot body, it is connected to the measuring circuit.

3. The novel electric pressure cooker pressure sensor according to claim 1 is characterized in that: The elastic member is a spring; a lower positioning column protruding upward is provided at the bottom of the inner cavity, a spring accommodating cavity is provided at the bottom of the detection head, an upper positioning column protruding downward is provided on the bottom of the spring accommodating cavity, and the upper and lower ends of the spring are respectively sleeved on the upper positioning column and the lower positioning column.

4. The novel electric pressure cooker pressure sensor according to claim 1 is characterized in that: The main body seat is provided with a mounting bracket, and the main body seat is mounted on the outer pot body of the electric pressure cooker through the mounting bracket.

5. The novel electric pressure cooker pressure sensor according to claim 4 is characterized in that: There is at least one mounting bracket located on the side of the main body seat, and the mounting bracket is integrally formed with the main body seat.

6. An electric pressure cooker with a new type of electric pressure cooker pressure sensor, characterized in that: include: An inner pot, an outer pot body and a heating plate, and an electric pressure cooker pressure sensor as described in any one of claims 1 to 5, wherein the main body of the electric pressure cooker pressure sensor is installed on the outer pot body; and the top of its detection head is in contact with the bottom of the heating plate.

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