A pressure sensor for pressure cookers based on metal shielding inductive

Abstract

The invention relates to the technical field of pressure cooker pressure sensors, and discloses a metal shielded inductive pressure cooker pressure sensor, comprising a sensor housing and a circuit component, wherein a threaded installation groove is provided inside the sensor housing. The metal shielded inductive pressure cooker pressure sensor has a simple and reliable structure and flexible installation dimensions, and can be directly installed by users without changing the existing product structure. The inductive element and the element pin wire are sealed and isolated by the inductive housing and the sealing ring, and the protection level is improved by greatly reducing the volume of the device. In addition, since the inductance of the inductive element is in a fixed state, the magnetic flux induction of the fixed inductor is concentrated, and the anti-interference ability of the sensor is greatly improved under the interaction with the metal shielding cup. The sensor housing is made of heat-resistant insulating material and uses a heat-resistant wire to lead the signal to the circuit component, thereby improving the environmental adaptability and effectively improving the output accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of pressure cooker pressure sensors, in particular to a metal shielding inductive pressure cooker pressure sensor. Background Art

[0002] The mechanical single or double pressure switch is a mechanical spring structure, which uses mechanical deformation to trigger the switch. It can only control single-point or two-point pressure. The production process is complicated, and the process of adjusting the pressure point in the pressure cooker is complicated. The existing electronic pressure cooker sensor uses a magnetic core to slide in the coil, changes the inductance into an electrical signal, and the coil is wound outside. It has poor anti-interference and requires a larger casing. The pressure cooker manufacturer needs to change the pressure cooker structure to cooperate with the installation, and the temperature resistance is not high. The traditional pressure sensor directly detects the pressure in the pot, and there is a problem of clogging the pores, maintenance and production costs. Therefore, how to provide a low-cost, high-temperature-resistant, easy-to-replace, small-size, high-precision, and stable pressure cooker sensor is a problem that needs to be solved in this field. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a metal shielded inductive pressure cooker pressure sensor, which has the advantages of low cost, small size, high precision and strong stability, and solves the problems existing in the existing pressure sensors.

[0004] In order to achieve the above-mentioned purposes of low cost, small volume, high precision and strong stability, the present invention provides the following technical solutions: a pressure sensor for a metal-shielded inductive pressure cooker, comprising a sensor housing and a circuit assembly, wherein a threaded mounting groove is provided inside the sensor housing, a reserved groove extending to the outer wall of the sensor housing is provided on the right side of the threaded mounting groove, an element groove communicating with the threaded mounting groove is provided inside the sensor housing, a perforated groove communicating with the element groove is provided inside the sensor housing, a sleeve plate is fixedly installed on the surface of the sensor housing, an installation housing is fixedly installed inside the sleeve plate and on the right side of the sensor housing, a reinforcing plate fixedly connected to the sleeve plate is fixedly installed on the side of the sensor housing opposite to the installation housing, a limiting groove is provided inside the installation housing, a threaded groove communicating with the limiting groove is provided inside the installation housing A mounting hole is provided, wherein a mounting screw is movably installed inside the threaded mounting hole, a temperature-resistant wire is fixedly connected to the left side of the circuit component, a conducting wire is fixedly installed on the right side of the circuit component, a metal shielding cup is movably installed inside the component slot, a spring component is fixedly installed on the inner bottom wall of the metal shielding cup, an inductor housing is fixedly installed on the top of the spring component, a cavity is provided inside the inductor housing, an expansion ring is fixedly installed on the top of the inductor housing, thread teeth are fixedly installed on the surface of the expansion ring, an inductor component is fixedly installed on the inner bottom wall of the cavity, a component lead wire is fixedly installed on the top of the inductor component, a sealing ring is fixedly installed on the inner wall of the expansion ring and located on the top of the inductor component, an embedded groove is provided at the bottom of the inductor housing, a table plate is fixedly installed on the bottom of the table plate, and a top pin penetrating the perforated groove is fixedly installed on the bottom of the table plate.

[0005] Preferably, the shape of the sensor housing is cylindrical, the material of the sensor housing is ceramic material, and the surface of the sleeve plate is provided with socket holes corresponding to the sensor housing and the mounting housing.

[0006] Preferably, the element lead wire is welded to the heat-resistant wire, the inductor element is electrically connected to the circuit assembly via the element lead wire and the heat-resistant wire, and the shape of the inductor element is an "I" shape or a rod shape.

[0007] Preferably, the threaded mounting groove is threadedly connected to the expansion ring via thread teeth, the height of the threaded mounting groove is greater than the height of the expansion ring, the width of the reserved groove is equal to the diameter of the heat-resistant wire, and the heat-resistant wire is stuck inside the reserved groove.

[0008] Preferably, the metal shielding cup is made of copper-aluminum alloy, the metal shielding cup is slidably connected to the inductor housing, the outer diameter of the expansion ring is larger than the inner diameter of the inductor housing, and the metal shielding cup is slidably connected to the component slot.

[0009] Preferably, the spring member is made of stainless steel, and the top of the spring member is embedded in the embedded groove.

[0010] Preferably, the sealing ring is made of silicone, a through hole corresponding to the component lead line is provided inside the sealing ring, and the height of the sealing ring is equal to the height of the component lead line.

[0011] Preferably, the sleeve plate and the mounting shell are both made of heat-resistant and insulating ceramic materials, and the height of the mounting shell is lower than the height of the sensor shell.

[0012] Preferably, the limit groove is circular, the diameter of the limit groove is equal to the diameter of the head of the mounting screw, the length of the mounting screw is greater than the height of the mounting shell, the mounting screw is threadedly connected to the mounting shell, and a high-temperature resistant plastic protective shell is installed on the surface of the circuit component.

[0013] Compared with the prior art, the present invention provides a metal shielded inductive pressure cooker pressure sensor, which has the following beneficial effects:

[0014] 1. The metal shielded inductive pressure cooker pressure sensor has a simple and reliable structure and flexible installation dimensions. Users can directly install it without changing the existing product structure. The inductive element and the element pin wire are sealed and isolated by the inductive housing and the sealing ring. The protection level is improved by greatly reducing the volume of the equipment. In addition, since the inductance of the inductive element is in a fixed state, the magnetic flux induction of the fixed inductor is concentrated. At the same time, the interaction with the metal shielding cup greatly improves the anti-interference ability of the sensor. The sensor housing is made of heat-resistant insulating material and uses heat-resistant wire to lead the signal to the circuit component. The sensor can work normally in a high temperature environment and the output accuracy is effectively improved.

[0015] 2. The metal shielded inductive pressure cooker pressure sensor has a threaded mounting groove and an expansion ring connected by threaded teeth, which is convenient for disassembly and maintenance by the staff. At the same time, a reserved groove is opened on the right side of the threaded mounting groove so that the temperature-resistant wire can be just stuck in the reserved groove, avoiding the temperature-resistant wire from contacting the pressure cooker and causing high-temperature damage, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a metal shielded inductive pressure cooker pressure sensor proposed by the present invention;

[0017] Figure 2 A schematic cross-sectional view of a sensor housing and a mounting housing of a metal shielded inductive pressure cooker pressure sensor proposed by the present invention;

[0018] Figure 3 The present invention provides a metal shielding cup of a metal shielding inductive pressure cooker pressure sensor and a schematic diagram of its internal structure.

[0019] In the figure: 1 sensor housing, 11 threaded mounting groove, 12 reserved groove, 13 component groove, 14 perforated groove, 2 set plate, 3 mounting housing, 31 limit groove, 32 threaded mounting hole, 4 reinforcement plate, 5 mounting screw, 6 temperature-resistant wire, 7 circuit component, 8 live wire, 9 metal shielding cup, 91 spring part, 92 inductor housing, 921 cavity, 922 expansion ring, 923 thread teeth, 924 inductor component, 925 component pin wire, 926 sealing ring, 927 embedded groove, 10 table, 101 ejector pin. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-3A metal shielded inductive pressure cooker pressure sensor comprises a sensor housing 1 and a circuit assembly 7. A threaded mounting groove 11 is provided inside the sensor housing 1. A reserved groove 12 extending to the outer wall of the sensor housing 1 is provided on the right side of the threaded mounting groove 11. A component groove 13 communicating with the threaded mounting groove 11 is provided inside the sensor housing 1. A perforated groove 14 communicating with the component groove 13 is provided inside the sensor housing 1. A sleeve plate 2 is fixedly installed on the surface of the sensor housing 1. A mounting housing 3 is fixedly installed inside the sleeve plate 2 and on the right side of the sensor housing 1. Both the sleeve plate 2 and the mounting housing 3 are made of heat-resistant insulating materials. The height of the mounting housing 3 is lower than that of the sensor housing 1. The shape of the sensor housing 1 is cylindrical. The material is heat-resistant insulating material. The surface of the sleeve plate 2 is provided with socket holes corresponding to the sensor housing 1 and the mounting housing 3. A reinforcing plate 4 fixedly connected to the sleeve plate 2 is fixedly installed on the side of the sensor housing 1 opposite to the mounting housing 3. A limiting groove 31 is provided inside the mounting housing 3. A threaded mounting hole 32 connected to the limiting groove 31 is provided inside the mounting housing 3. A mounting screw 5 is movably installed inside the threaded mounting hole 32. The limiting groove 31 is circular. The diameter of the limiting groove 31 is equal to the head diameter of the mounting screw 5. The length of the mounting screw 5 is greater than the height of the mounting housing 3. The mounting screw 5 is threadedly connected to the mounting housing 3. A high-temperature resistant plastic protective shell is installed on the surface of the circuit component 7. A heat-resistant wire 6 is fixedly connected to the left side of the circuit component 7. The circuit component 7 A live wire 8 is fixedly installed on the right side of the component slot 13, a metal shielding cup 9 is movably installed inside the component slot 13, a spring member 91 is fixedly installed on the inner bottom wall of the metal shielding cup 9, an inductor housing 92 is fixedly installed on the top of the spring member 91, a cavity 921 is opened inside the inductor housing 92, an expansion ring 922 is fixedly installed on the top of the inductor housing 92, the metal shielding cup 9 is made of copper-aluminum alloy, the metal shielding cup 9 is slidably connected to the inductor housing 92, the outer diameter of the expansion ring 922 is larger than the inner diameter of the inductor housing 92, the metal shielding cup 9 is slidably connected to the component slot 13, the threaded mounting groove 11 is threadedly connected to the expansion ring 922 through thread teeth 923, the height of the threaded mounting groove 11 is larger than the height of the expansion ring 922, and the width of the reserved groove 12 is the same as that of the temperature-resistant wire 6 The diameters are equal, the heat-resistant wire 6 is stuck in the reserved groove 12, the surface of the expansion ring 922 is fixedly installed with thread teeth 923, the inner bottom wall of the cavity 921 is fixedly installed with an inductor element 924, the top of the inductor element 924 is fixedly installed with a component pin line 925, the component pin line 925 is welded with the heat-resistant wire 6, the inductor element 924 is electrically connected to the circuit component 7 through the component pin line 925 and the heat-resistant wire 6, the shape of the inductor element 924 is an "I" shape, the inner wall of the expansion ring 922 and the top of the inductor element 924 are fixedly installed with a sealing ring 926, the material of the sealing ring 926 is silicone, the inside of the sealing ring 926 is provided with a through hole corresponding to the component pin line 925, and the height of the sealing ring 926 is equal to the height of the component pin line 925,The bottom of the inductor housing 92 is provided with an embedded groove 927, the spring member 91 is made of stainless steel, the top of the spring member 91 is embedded in the embedded groove 927, the bottom of the metal shielding cup 9 is fixedly mounted with a table 10, and the bottom of the table 10 is fixedly mounted with a pin 101 penetrating the perforated groove 14.

[0022] In summary, the metal shielding inductive pressure cooker pressure sensor has a simple and reliable structure and flexible installation dimensions. Users can directly install it without changing the existing product structure. The inductive element 924 and the element pin line 925 are sealed and isolated by the inductive housing 92 and the sealing ring 926. The protection level is improved by greatly reducing the volume of the equipment. In addition, since the inductance of the inductive element 924 is in a fixed state, the magnetic flux induction of the fixed inductor is concentrated. At the same time, under the interaction with the metal shielding cup 9, the anti-interference ability of the sensor is greatly improved. The sensor housing 1 is made of heat-resistant insulating material and uses a heat-resistant wire 6 to lead the signal to the circuit component 7. The sensor can work normally in a high temperature environment and the output accuracy is effectively improved.

[0023] Moreover, in the metal shielded inductive pressure cooker pressure sensor, the threaded mounting groove 11 is threadedly connected to the expansion ring 922 through thread teeth 923, which is convenient for staff to disassemble and maintain. At the same time, a reserved groove 12 is opened on the right side of the threaded mounting groove 11, so that the temperature-resistant wire 6 can be just stuck in the reserved groove 12, avoiding the temperature-resistant wire 6 from contacting the pressure cooker and causing damage due to high temperature, thereby extending its service life.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal shielded inductive pressure cooker pressure sensor, comprising a sensor housing (1) and a circuit assembly (7), characterized in that: The sensor housing (1) has a threaded mounting groove (11) formed inside, a reserved groove (12) extending to the outer wall of the sensor housing (1) formed on the right side of the threaded mounting groove (11), an element groove (13) communicating with the threaded mounting groove (11) formed inside the sensor housing (1), a perforated groove (14) communicating with the element groove (13) formed inside the sensor housing (1), a sleeve plate (2) fixedly mounted on the surface of the sensor housing (1), a mounting housing (3) fixedly mounted inside the sleeve plate (2) and located on the right side of the sensor housing (1), and the sensor housing (1) The shape of the sensor housing (1) is cylindrical, the material of the sensor housing (1) is a heat-resistant insulating material, the surface of the sleeve plate (2) is provided with sleeve holes corresponding to the sensor housing (1) and the mounting housing (3), a reinforcing plate (4) fixedly connected to the sleeve plate (2) is fixedly installed on the side of the sensor housing (1) opposite to the mounting housing (3), a limiting groove (31) is provided inside the mounting housing (3), a threaded mounting hole (32) connected to the limiting groove (31) is provided inside the mounting housing (3), a mounting screw (5) is movably installed inside the threaded mounting hole (32), and the left side of the circuit component (7) is fixed A heat-resistant wire (6) is connected, a power-on wire (8) is fixedly installed on the right side of the circuit component (7), a metal shielding cup (9) is movably installed inside the element slot (13), a spring component (91) is fixedly installed on the inner bottom wall of the metal shielding cup (9), an inductor housing (92) is fixedly installed on the top of the spring component (91), a cavity (921) is opened inside the inductor housing (92), an expansion ring (922) is fixedly installed on the top of the inductor housing (92), a threaded tooth (923) is fixedly installed on the surface of the expansion ring (922), and the inner bottom wall of the cavity (921) is fixedly installed An inductor element (924) is provided, a component lead wire (925) is fixedly mounted on the top of the inductor element (924), a sealing ring (926) is fixedly mounted on the inner wall of the expansion ring (922) and located on the top of the inductor element (924), an embedded groove (927) is provided at the bottom of the inductor housing (92), the spring component (91) is made of stainless steel, the top of the spring component (91) is embedded in the embedded groove (927), a table plate (10) is fixedly mounted on the bottom of the metal shielding cup (9), and a top pin (101) penetrating the perforated groove (14) is fixedly mounted on the bottom of the table plate (10).

2. The metal shielded inductive pressure cooker pressure sensor according to claim 1, characterized in that: The component lead wire (925) is welded to the heat-resistant wire (6), and the inductor element (924) is electrically connected to the circuit component (7) via the component lead wire (925) and the heat-resistant wire (6). The shape of the inductor element (924) is an "I" shape.

3. The metal shielded inductive pressure cooker pressure sensor according to claim 1, characterized in that: The threaded mounting groove (11) is threadedly connected to the diameter expansion ring (922) via thread teeth (923); the height of the threaded mounting groove (11) is greater than the height of the diameter expansion ring (922); the width of the reserved groove (12) is equal to the diameter of the temperature-resistant wire (6); and the temperature-resistant wire (6) is stuck inside the reserved groove (12).

4. The metal shielded inductive pressure cooker pressure sensor according to claim 1, characterized in that: The metal shielding cup (9) is made of copper-aluminum alloy, the metal shielding cup (9) is slidably connected to the inductor housing (92), the outer diameter of the expansion ring (922) is larger than the inner diameter of the inductor housing (92), and the metal shielding cup (9) is slidably connected to the element slot (13).

5. The metal shielded inductive pressure cooker pressure sensor according to claim 1, characterized in that: The sealing ring (926) is made of silicone rubber, and a through hole corresponding to the component lead wire (925) is provided inside the sealing ring (926). The height of the sealing ring (926) is equal to the height of the component lead wire (925).

6. The metal shielded inductive pressure cooker pressure sensor according to claim 1, characterized in that: The sleeve plate (2) and the mounting shell (3) are both made of temperature-resistant insulating materials, and the height of the mounting shell (3) is lower than the height of the sensor shell (1).

7. The metal shielded inductive pressure cooker pressure sensor according to claim 1, characterized in that: The limiting groove (31) is circular, the diameter of the limiting groove (31) is equal to the diameter of the head of the mounting screw (5), the length of the mounting screw (5) is greater than the height of the mounting housing (3), the mounting screw (5) is threadedly connected to the mounting housing (3), and a high temperature resistant plastic protective shell is installed on the surface of the circuit component (7).

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