Magnetic core assembly of water level sensor

Abstract

The invention provides a magnetic core assembly of a water level sensor, and relates to the field of water level sensors, and the magnetic core assembly comprises a top end box body, the top end of the top end box body is provided with a top cover structure, the surface of one side of the top end box body is provided with a circuit connector, the lower end of the top end box body is provided with a magnetic core adjusting connector, and the top end box body is internally provided with a single-chip microcomputer. Heat dissipation holes are formed in the surface of the top end box body on one side of the single chip microcomputer, a filtering air bag is fixedly connected to the surface of the lower end of the magnetic core adjusting connector, a sealing connector is arranged on the surface of the upper portion of the filtering air bag, and a filtering net is arranged at the bottom of the filtering air bag; the water level sensor is used for solving the problems that when a washing machine is not used for a long time, due to magnetic attraction of the contact faces of a composite magnetic core and a coil, metal dust and other sundries are adsorbed to the connecting faces of the composite magnetic core and the coil, and the sensor is prone to failure in the using process; and the diaphragm slightly moves under the action of the outside, so that the periphery of the diaphragm is abraded.

Description

Technical Field

[0001] The present invention mainly relates to the field of water level sensors, and in particular to a magnetic core component of a water level sensor. Background Art

[0002] At present, the working principle of the washing machine water level sensor is based on the oscillation principle of the LC oscillation circuit. When the water level pressure enters the air chamber through the air nozzle of the bottom cover, the diaphragm receives the air pressure and drives the composite magnetic core to move up and down in the coil. The up and down movement of the composite magnetic core changes the inductance of the coil. The change in inductance is processed by the LC oscillation circuit and the amplification circuit, and then converted into a frequency change and sent to the single-chip microcomputer for processing. The resulting signal is sent to the washing machine drive mechanism to control the water level of the washing machine.

[0003] In the utility model patent application with application number CN201821609167.8 and publication date 2019.07.19, entitled "A Water Level Sensor for a Washing Machine", the invention comprises a shell and an air cover arranged at the bottom of the shell, the air cover is provided with a diaphragm core assembly, the diaphragm core assembly comprises a diaphragm and a core assembly, the air cover and the core assembly are connected by a diaphragm, the shell is further provided with an enameled coil, an adjusting screw and an elastic component, the enameled coil is connected to the adjusting screw through the elastic component, a gasket is provided between the diaphragm core assembly and the enameled coil, the gasket is used to penetrate the diaphragm core assembly and connect the diaphragm core assembly to the shell through the enameled coil, the device is provided with a pipeline, the pipeline is provided with a snap groove, the pipeline is used to connect to the washing machine, making the connection more convenient and able to withstand greater water pressure and air pressure without falling off easily.

[0004] However, in actual use, when the washing machine is not in use for a long time, the contact surface between the composite magnetic core and the coil will absorb metal dust and other debris due to magnetic attraction. This may cause the sensor to malfunction during use. In addition, when the water level sensor is not in use, its diaphragm may move slightly under the influence of external factors, causing wear on its surroundings. Summary of the Invention

[0005] 1. Technical problem to be solved by the invention: The present invention provides a magnetic core assembly for a water level sensor, which is used to solve the problem that when a washing machine is not used for a long time, the contact surface between the composite magnetic core and the coil adsorbs metal dust and other debris due to magnetic attraction, which easily leads to sensor failure during use. When the water level sensor is not in use, its diaphragm moves slightly under the influence of external factors, causing wear on its surroundings.

[0006] 2. Technical solution: To achieve the above-mentioned purpose, the technical solution provided by the present invention is: a magnetic core assembly of a water level sensor, comprising a top box body, a top cover structure installed on the top of the top box body, a circuit connector provided on one side surface of the top box body, a magnetic core adjustment connector provided on the lower end of the top box body, a single-chip microcomputer provided inside the top box body, a heat dissipation hole provided on one side of the single-chip microcomputer on the surface of the top box body, a filter air bag fixedly connected to the lower end surface of the magnetic core adjustment connector, a closed connector provided on the upper surface of the filter air bag, a filter net provided at the bottom of the filter air bag, the magnetic core adjustment connector and the single-chip microcomputer inside the top box body are interconnected, and the single-chip microcomputer receives the working signal sent by the magnetic core adjustment connector, and the filter air bag is hollow inside and interconnected with the magnetic core adjustment connector.

[0007] Furthermore, the magnetic core adjustment joint includes a long-handled rotating rod, a hexagonal head rotating block is provided on the lower surface of the long-handled rotating rod, a joint cover is threadedly connected to the surface of the hexagonal head rotating block, a magnetic ring box is provided on the lower end surface of the joint cover, electromagnetic coils are arranged up and down inside the magnetic ring box, a lower pressure-bearing tube is provided at the lower end of the magnetic ring box, a composite magnetic core is provided at the bottom end of the long-handled rotating rod inside the electromagnetic coil, a sealing diaphragm is provided on the lower end surface of the composite magnetic core, and a reset spring is provided above the composite magnetic core at the lower end of the long-handled rotating rod.

[0008] Furthermore, the long-handled rotating rod forms an elastic structure through a reset spring, a composite magnetic core and a sealing diaphragm, and the top box body forms a rotating telescopic structure on the surface of the hexagonal head turn block through the long-handled rotating rod fixedly connected to its bottom, and the hexagonal head turn block is threadedly connected to the top of the joint cover.

[0009] Furthermore, the magnetic coil box is connected to the filter airbag through a lower pressure-bearing tube. The outer diameter of the composite magnetic core and the sealing diaphragm is the same as the inner diameter of the electromagnetic coil, and a sliding structure is formed inside the electromagnetic coil. The surface of the magnetic coil box is provided with mounting threads.

[0010] Furthermore, the closed joint includes a lower connecting pipe, an outer sleeve is provided on the surface of the lower connecting pipe, a threaded rotating push rod is provided on the surface of the outer sleeve, a sealing block slide is provided on the inner wall of the lower connecting pipe, a support spring is provided on the inner surface of the sealing block slide, an elastic slider is provided on one side surface of the support spring, a vent is provided on the surface of the elastic slider, and one side of the elastic slider is slidably connected to the surface of the lower connecting pipe with a support column.

[0011] Furthermore, a large through hole is provided on the surface of the sealing block slide, and the elastic slider forms an elastic sliding structure on the surface of the sealing block slide through a supporting spring, and the threaded rotating push rod pushes the abutment column to align the vent hole on the surface of the elastic slider with the large through hole.

[0012] 3.Beneficial effects: (1) When the water level sensor is installed inside the washing machine, it is installed inside the washing machine through the threads on the surface of the magnetic ring box. When the water level sensor is working, the water inside the washing machine is filtered through the filter net under the filter airbag, and at the same time, the water level pressure enters the closed joint through the filter airbag. Before that, the threaded rotating push rod is rotated to push the anti-pillar, and then the elastic slider is pushed inside the sealing block slide until the vent hole on the surface of the sealing block slide is aligned with the large through hole set on the surface of the sealing block slide. At the same time, the water level pressure inside the filter airbag can move to the inside of the magnetic core adjustment joint through the large through hole and the vent hole, so that when the washing machine is not in use, the diaphragm of the water level sensor moves slightly under the action of the outside world, causing wear on its surroundings. (2) When the water level pressure enters the magnetic coil box in the magnetic core adjustment joint, it pushes the sealing diaphragm and the composite magnetic core to move. The up and down movement of the composite magnetic core changes the inductance of the electromagnetic coil. The change in inductance is processed by the LC oscillation circuit and the amplifier circuit, and then converted into a change in frequency and sent to the single-chip microcomputer for processing. The resulting signal is sent to the washing machine drive mechanism to control the height of the washing machine water level. When the washing machine is not working for a long time, the top box body is manually lifted to drive the long-handled rotating rod below it, and the composite magnetic core and the sealing diaphragm slide inside the electromagnetic coil. This avoids the contact surface of the composite magnetic core and the coil after the washing machine is not used for a long time. Due to its magnetic attraction, the connection surface between the composite magnetic core and the coil adsorbs metal dust and other debris, thereby avoiding sensor failure during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the present invention; Figure 3 Schematic diagram of the magnetic core adjustment joint of the present invention; Figure 4 Schematic diagram of the composite magnetic core and electromagnetic coil of the present invention; Figure 5 is a schematic diagram of a closed joint of the present invention; Figure 6 Schematic diagram of the interior of the closed joint of the present invention.

[0014] Reference numerals: 1. Top box body; 2. Top cover structure; 3. Circuit connector; 4. Magnetic core adjustment connector; 401. Long-handle rotating rod; 402. Hexagonal head rotating block; 403. Connector cover; 404. Magnetic ring box; 405. Electromagnetic coil; 406. Lower pressure tube; 407. Composite magnetic core; 408. Sealing diaphragm; 409. Reset spring; 5. Single-chip microcomputer; 6. Heat dissipation hole; 7. Filter air bag; 8. Closed connector; 801. Lower connecting pipe; 802. Outer disc; 803. Threaded rotating ejector rod; 804. Sealing block slide; 805. Support spring; 806. Elastic slider; 807. Vent; 808. Column; 9. Waterproof and breathable membrane. DETAILED DESCRIPTION

[0015] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown 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 thorough and comprehensive.

[0016] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," "provided with," and the like should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0017] Example: Refer to the attached Figure 1-6 , a magnetic core assembly of a water level sensor includes a top box body 1, a top cover structure 2 is installed on the top of the top box body 1, a circuit connector 3 is provided on one side surface of the top box body 1, a magnetic core adjustment connector 4 is provided at the lower end of the top box body 1, a single-chip microcomputer 5 is provided inside the top box body 1, and a heat dissipation hole 6 is provided on one side of the single-chip microcomputer 5 on the surface of the top box body 1, a filter air bag 7 is fixedly connected to the lower end surface of the magnetic core adjustment connector 4, and a closed joint 8 is provided on the upper surface of the filter air bag 7. A waterproof and breathable membrane 9 is provided at the bottom of the filter air bag 7, the magnetic core adjustment connector 4 is interconnected with the single-chip microcomputer 5 inside the top box body 1, and the single-chip microcomputer 5 receives the working signal sent by the magnetic core adjustment connector 4, the filter air bag 7 is hollow inside and is interconnected with the magnetic core adjustment connector 4. The technical solution achieves through the closed joint 8 that when the washing machine is not in use, its diaphragm moves slightly under the action of the outside world, causing wear on its surroundings.

[0018] The magnetic core adjustment joint 4 includes a long-handled rotating rod 401, a hexagonal head rotating block 402 is provided on the lower surface of the long-handled rotating rod 401, a joint cover 403 is threadedly connected to the surface of the hexagonal head rotating block 402, a magnetic ring box 404 is provided on the lower end surface of the joint cover 403, an electromagnetic coil 405 is arranged up and down inside the magnetic ring box 404, a lower pressure-bearing tube 406 is provided at the lower end of the magnetic ring box 404, a composite magnetic core 407 is provided inside the electromagnetic coil 405 at the bottom end of the long-handled rotating rod 401, a sealing diaphragm 408 is provided on the lower end surface of the composite magnetic core 407, and a sealing diaphragm 408 is provided on the lower end of the long-handled rotating rod 401 above the composite magnetic core 407. A return spring 409 is provided, and the long-handled rotating rod 401 forms an elastic structure with the composite magnetic core 407 and the sealing diaphragm 408 through the return spring 409. The top box body 1 forms a rotating and telescopic structure on the surface of the hexagonal head rotating block 402 through the long-handled rotating rod 401 fixedly connected to its bottom. The hexagonal head rotating block 402 is threadedly connected to the top of the joint cover 403. The magnetic coil box 404 is interconnected with the filter airbag 7 through the lower pressure-bearing tube 406. The outer diameter of the composite magnetic core 407 and the sealing diaphragm 408 is the same as the inner diameter of the electromagnetic coil 405, and a sliding structure is formed inside the electromagnetic coil 405. The surface of the magnetic coil box 404 is provided with a mounting thread.

[0019] In this embodiment, when the water level sensor is installed inside the washing machine, it is installed inside the washing machine through the threads on the surface of the magnetic coil box 404. When the water level sensor is working, the water inside the washing machine is filtered by the filter mesh 9 under the filter air bag 7, and at the same time, the water level pressure enters the closed joint 8 through the filter air bag 7. Before that, the threaded rotating top rod 803 is rotated to push the support column 808, thereby pushing the elastic slider 806 to slide inside the sealing block slot 804 until the vent hole 807 on the surface of the sealing block slot 804 is aligned with the large through hole set on the surface of the sealing block slot 804. At the same time, the water level pressure inside the filter air bag 7 can move to the inside of the magnetic core adjustment joint 4 through the large through hole and the vent hole 807, thereby avoiding the water level sensor's diaphragm from slightly moving under the influence of the outside world when the washing machine is not in use, causing wear around it.

[0020] The closed joint 8 includes a lower connecting pipe 801, an outer sleeve 802 is provided on the surface of the lower connecting pipe 801, a threaded rotating push rod 803 is provided on the surface of the outer sleeve 802, a sealing block slide 804 is provided on the inner wall of the lower connecting pipe 801, and a support spring 805 is provided on the inner surface of the sealing block slide 804. An elastic slider 806 is provided on one side of the support spring 805, and a vent 807 is provided on the surface of the elastic slider 806. One side of the elastic slider 806 is slidably connected to a column 808 on the surface of the lower connecting pipe 801, and a large through hole is provided on the surface of the sealing block slide 804. The elastic slider 806 forms an elastic sliding structure on the surface of the sealing block slide 804 through the support spring 805, and the threaded rotating push rod 803 pushes the column 808 to align the vent 807 on the surface of the elastic slider 806 with the large through hole.

[0021] In this embodiment, when water pressure enters the magnetic coil box 404 in the magnetic core adjustment joint 4, it pushes the sealing diaphragm 408 and composite magnetic core 407 to move. The upward and downward movement of composite magnetic core 407 changes the inductance of electromagnetic coil 405. This change in inductance is processed by the LC oscillator circuit and amplifier circuit, converted into a frequency change, and sent to the single-chip microcomputer 5 for processing. The resulting signal is sent to the washing machine drive mechanism to control the water level. When the washing machine is not in use for a long time, the top box 1 is manually lifted, causing it to drive the long-handled rotating rod 401 below it. The composite magnetic core 407 and sealing diaphragm 408 slide inside the electromagnetic coil 405, preventing the contact surface between the composite magnetic core and the coil from attracting metal dust and other debris due to magnetic attraction after long periods of non-use, thereby preventing sensor malfunction during use.

[0022] The above-mentioned embodiments only express a certain implementation method of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. 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, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. A magnetic core assembly of a water level sensor, characterized in that The invention comprises a top box body (1), a top cover structure (2) is installed at the top of the top box body (1), a circuit connector (3) is arranged on one side surface of the top box body (1), a magnetic core adjustment connector (4) is arranged at the lower end of the top box body (1), a single chip computer (5) is arranged inside the top box body (1), a heat dissipation hole (6) is arranged on one side of the single chip computer (5) on the surface of the top box body (1), a filter air bag (7) is fixedly connected to the lower end surface of the magnetic core adjustment connector (4), a closed connector (8) is arranged on the upper surface of the filter air bag (7), a filter net (9) is arranged at the bottom of the filter air bag (7), the magnetic core adjustment connector (4) is interconnected with the single chip computer (5) inside the top box body (1), and the single chip computer (5) receives the working signal sent by the magnetic core adjustment connector (4), and the filter air bag (7) is hollow inside and interconnected with the magnetic core adjustment connector (4).

2. The magnetic core assembly of a water level sensor according to claim 1, characterized in that: The magnetic core adjustment joint (4) comprises a long-handled rotating rod (401), a hexagonal rotating block (402) is arranged on the lower surface of the long-handled rotating rod (401), a joint cover (403) is threadedly connected to the surface of the hexagonal rotating block (402), a magnetic ring box (404) is arranged on the lower end surface of the joint cover (403), electromagnetic coils (405) are arranged up and down inside the magnetic ring box (404), a lower pressure-bearing tube (406) is arranged at the lower end of the magnetic ring box (404), a composite magnetic core (407) is arranged inside the electromagnetic coil (405) at the bottom end of the long-handled rotating rod (401), a sealing diaphragm (408) is arranged on the lower end surface of the composite magnetic core (407), and a return spring (409) is arranged at the lower end of the long-handled rotating rod (401) above the composite magnetic core (407).

3. The magnetic core assembly of a water level sensor according to claim 2, characterized in that: The long-handled rotating rod (401) forms an elastic structure with a composite magnetic core (407) and a sealing diaphragm (408) through a return spring (409); the top box body (1) forms a rotating telescopic structure on the surface of a hexagonal rotating block (402) through the long-handled rotating rod (401) fixedly connected to its bottom; and the hexagonal rotating block (402) is threadedly connected to the top of the joint cover (403).

4. The magnetic core assembly of a water level sensor according to claim 2, characterized in that: The magnetic coil box (404) is connected to the filter air bag (7) via a lower pressure-bearing tube (406); the outer diameter of the composite magnetic core (407) and the sealing diaphragm (408) is the same as the inner diameter of the electromagnetic coil (405); a sliding structure is formed inside the electromagnetic coil (405); and a mounting thread is provided on the surface of the magnetic coil box (404).

5. The magnetic core assembly of a water level sensor according to claim 1, characterized in that: The closed joint (8) comprises a lower connecting pipe (801), an outer sleeve (802) is arranged on the surface of the lower connecting pipe (801), a threaded rotating top rod (803) is arranged on the surface of the outer sleeve (802), a sealing block slide groove (804) is arranged on the inner wall of the lower connecting pipe (801), a supporting spring (805) is arranged on the inner surface of the sealing block slide groove (804), an elastic slider (806) is arranged on one side of the supporting spring (805), a vent hole (807) is arranged on the surface of the elastic slider (806), and a support column (808) is slidably connected to the surface of the lower connecting pipe (801) on one side of the elastic slider (806).

6. The magnetic core assembly of a water level sensor according to claim 5, characterized in that: The surface of the sealing block slide groove (804) is provided with a large through hole, the elastic slider (806) forms an elastic sliding structure on the surface of the sealing block slide groove (804) through the support spring (805), and the threaded rotating push rod (803) pushes the support column (808) to align the vent hole (807) on the surface of the elastic slider (806) with the large through hole.

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