CN210108470U

CN210108470U - Water level sensor with clean inner space

Info

Publication number: CN210108470U
Application number: CN201920905758.8U
Authority: CN
Inventors: 钱勇国
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-02-21
Anticipated expiration: 2029-06-13

Abstract

The utility model belongs to the technical field of the water level sensor technique and specifically relates to a water level sensor of clean ization of inner space, including coil support, coil support fixes inside the casing of middle part, coil support includes integrated into one piece's last spacing portion, middle wire winding portion, lower spacing portion, middle wire winding portion winding has the enameled wire, goes up spacing portion one side and is equipped with the terminal fixed part, be fixed with the terminal part on the terminal fixed part, the terminal part is connected with the enameled wire electricity, lower spacing portion arranges in the second through-hole, and flushes with the shrouding, lower spacing portion week side leaves air gap before with the second through-hole inner wall. Various components and parts on the coil support hide between middle part casing, upper cover, reserve specially to establish the second cavity and supply the rubber diaphragm up-and-down motion, make inside cleaner and tidier of second air cavity, third air cavity, the modularization operation of being convenient for, because the cavity of rubber diaphragm motion does not have other components and parts, reduce external environment's interference, improve sensor detection accuracy.

Description

Water level sensor with clean inner space

Technical Field

The utility model relates to a level sensor technical field especially relates to a level sensor of clean ization of inner space.

Background

One end of the water level sensor air inlet nozzle is connected to an air collection chamber in the inner cylinder of the washing machine through a hose to form a complete set of liquid level detection system of the inner cylinder of the washing machine. The working principle of the water level sensor is that the diaphragm is pushed to move up and down through gas, the diaphragm drives the magnetic core to cut an electromagnetic wire in the inductance coil, so that the inductance value of the inductance coil is driven to change, the higher the water level in the washing machine is, the higher the upward movement height of the magnetic core is, otherwise, the lower the upward movement height of the magnetic core is, and then the signal is transmitted to the water level controller of the washing machine to judge the water level height.

Traditional level sensor divide into casing, casing down, and two cavities about the inside divide into of casing about from top to bottom, and the inside components and parts of cavity distribute disorderly, not only influence production assembly efficiency, influence the product detection precision moreover.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defect that the internal components and parts of the sensor shell are distributed disorderly in the prior art and providing a water level sensor with a clean internal space.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the water level sensor comprises a sensor shell, wherein an inductance coil assembly and a magnetic core assembly for cutting an electromagnetic wire are arranged in the sensor shell, the sensor shell comprises an air inlet cover, a middle shell and an upper cover, the middle shell is arranged above the air inlet cover, the middle shell and the upper cover are fixed together in a clamping mode, an air inlet nozzle is arranged at the bottom of the air inlet cover, a horizontally arranged sealing plate is integrally formed in the middle of the middle shell, a second through hole is formed in the middle of the sealing plate, a rubber diaphragm is arranged between the middle shell and the air inlet cover in a pressing mode, an inner cavity of the sensor shell is divided into a first air cavity, a second air cavity and a third air cavity through the rubber diaphragm and the sealing plate, and the second air cavity and the third air cavity are communicated through the second through hole;

the inductance coil assembly comprises a coil support, the coil support is fixed inside the middle shell, the coil support comprises an upper limiting part, a middle winding part and a lower limiting part which are integrally formed, a groove spanning plate is arranged below the upper limiting part, an enameled wire is wound on the middle winding part, a terminal fixing part is arranged on one side of the upper limiting part, a terminal part is fixed on the terminal fixing part, and the terminal part is electrically connected with the enameled wire.

The lower limiting part is arranged in the second through hole and is flush with the sealing plate, and a ventilation gap is reserved between the periphery of the lower limiting part and the front of the inner wall of the second through hole.

Preferably, three limiting lugs are arranged on the periphery of the upper limiting part of the coil support, a U-shaped limiting groove is formed on the periphery of the upper end of the middle shell, and the limiting lugs are arranged in the limiting groove.

Preferably, the limiting lugs are provided with third through holes, each limiting groove is provided with a second protrusion in the middle, the second protrusions penetrate through and are inserted into the third through holes when the limiting lugs are arranged in the limiting grooves, and the positions of the second protrusions are welded by ultrasonic waves.

The utility model provides a water level sensor of inner space wholeization, beneficial effect lies in: various components and parts on the coil support hide between middle part casing, upper cover, reserve specially to establish the second cavity and supply the rubber diaphragm up-and-down motion, make inside cleaner and tidier of second air cavity, third air cavity, the modularization operation of being convenient for, because the cavity of rubber diaphragm motion does not have other components and parts, reduce external environment's interference, improve sensor detection accuracy.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

fig. 2 is a schematic view of the overall appearance structure of the present invention;

FIG. 3 is a schematic view of the assembly structure of the coil support and the middle housing according to the present invention;

FIG. 4 is a schematic view of the overall appearance of the bottom structure of the present invention;

FIG. 5 is a schematic view of a partial half-section structure of the present invention;

FIG. 6 is a schematic view of a partial half-section structure of the present invention;

fig. 7 is a schematic view of the assembly structure of the wire harness head of the present invention;

FIG. 8 is a schematic view of a rubber diaphragm decomposing half-section structure of the present invention;

fig. 9 is a schematic structural view of the air intake cover of the present invention;

fig. 10 is a schematic view of the coil support structure of the present invention;

fig. 11 is a schematic view of the structure of the middle housing of the present invention;

fig. 12 is a schematic view of the upper cover structure of the present invention;

fig. 13 is a schematic view of the bottom structure of the middle casing of the present invention.

In the figure: the air inlet nozzle comprises an air inlet nozzle 1, a first protrusion 2, a first air cavity 3, a second air cavity 4, a first buckle 5, a third air cavity 6, a terminal part 7, a limiting strip 8, an upper cover 9, a screw cap 10, a spring 11, a push rod cap 12, a cross-groove plate 13, a coil support 14, a clamping groove opening 15, a second buckle 16, a micro air hole 17, a magnetic core 18, a push rod support 19, an annular groove 20, an annular protrusion 21, a strip-shaped protrusion 22, an air inlet cover 23, a middle shell 24, a limiting boss 25, a limiting groove 26, a second protrusion 27, a supporting plate 28, a third buckle 29, a fourth buckle 30, a wiring harness head 31, a first through hole 32, a second through hole 33, a third through hole 34, a rubber diaphragm 35, a sealing plate 36, a side baffle 37, an upper limiting part 38, a lower limiting part 39, a terminal fixing part 40 and a U-shaped.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1 to 13, a water level sensor includes a sensor housing having an induction coil assembly and a magnetic core assembly for cutting an electromagnetic wire therein;

when the magnetic core moves, the electromagnetic wire of the inductance coil is cut, so that the inductance of the inductance coil is driven to change, the higher the water level in the washing machine is, the higher the upward movement height of the magnetic core is, otherwise, the lower the upward movement height of the magnetic core is, and then the signal is transmitted to the water level controller of the washing machine to judge the water level height.

Referring to fig. 1, 2, 4 and 6, the sensor housing includes an air inlet cover 23, a middle housing 24 disposed above the air inlet cover 23, and an upper cover 9 disposed above the middle housing 24, the air inlet cover 23, the middle housing 24 and the upper cover 9 are fixed together in a clamping manner, and are fixed simply and conveniently in the clamping manner, so as to improve assembly efficiency, the bottom of the air inlet cover 23 is provided with an air inlet nozzle 1, a horizontally disposed sealing plate 36 is integrally formed in the middle of the middle housing 24, a second through hole 33 is formed in the middle of the sealing plate 36, a rubber diaphragm 35 is pressed between the middle housing 24 and the air inlet cover 23, an internal cavity of the sensor housing is divided into a first air cavity 3, a second air cavity 4 and a third air cavity 6 by the rubber diaphragm 35 and the sealing plate 36, and the second air cavity 4 and the third air cavity 6 are communicated by the;

the water level sensors of two traditional cavities are designed into the water level sensors of three cavities, so that the distribution of the internal space of the sensor is optimized, the cavities are separated from the coils, the stability of product operation is improved, the modularized operation of the internal production of the product is realized, the production efficiency of the product is improved, and the product quality is effectively improved.

Referring to fig. 1, the magnetic core assembly includes a magnetic core 18, a plunger holder 19 is fixed on a rubber diaphragm 35, and the magnetic core 18 is sleeved on the plunger holder 19;

referring to fig. 1 and 10, the inductance coil assembly includes a coil support 14, the coil support 14 is fixed inside the middle housing 24, the coil support 14 includes an upper limiting portion 38, a middle winding portion, and a lower limiting portion 39, which are integrally formed, a slot spanning plate 13 is disposed below the upper limiting portion 38, an enamel wire is wound around the middle winding portion, a terminal fixing portion 40 is disposed on one side of the upper limiting portion 38, a terminal portion 7 is fixed on the terminal fixing portion 40, and the terminal portion 7 is electrically connected to the enamel wire.

Referring to fig. 1, 11 and 13, the lower limiting portion 39 is disposed in the second through hole 33 and flush with the sealing plate 36, and an air gap is left between the peripheral side of the lower limiting portion 39 and the inner wall of the second through hole 33 to ensure the communication between the second air cavity 4 and the third air cavity 6;

various components and parts on the coil support hide in middle part casing 24, between the upper cover 9, reserve specially and establish the second cavity and supply rubber diaphragm up-and-down motion, make

second air cavity

4, 6 inside cleaner and tidier of third air cavity, the modular operation of being convenient for, because the cavity of rubber diaphragm motion does not have other components and parts, reduce external environment's interference, improve sensor detection accuracy, other parts except the terminal of coil skeleton hide between upper cover 9 and middle part casing 24, and is not only pleasing to the eye, and reduce the probability of component damage on the coil skeleton.

In the working process, gas enters the first air cavity 3 from the air inlet cover 23, the gas conveyed to the inside of the first air cavity 3 is gradually increased along with the increase of the water level of the washing machine, the rubber diaphragm 35 is pushed to move upwards through the gas, the magnetic core 18 is pushed to move upwards through the rubber diaphragm 35, the magnetic core 18 moves inside the coil support 14, the electromagnetic wire of the inductance coil is cut in the moving process of the coil support 14, therefore, the inductance of the inductance coil is driven to change, and the water level height of the washing machine is judged according to the change of the inductance.

Referring to fig. 1, 2, 3, 9, 11, 12, an inner circumferential wall of the air inlet cover 23 is provided with a plurality of integrally formed first buckles 5, a bottom of the middle housing 24 is integrally formed with a protruding portion extending outward, the middle housing 24 is clamped inside the air inlet cover 23 through the first buckles 5 and the protruding portion, an outer circumferential wall of an upper portion of the middle housing 24 is provided with a plurality of integrally formed second buckles 16, a plurality of clamping slots 15 matched with the second buckles 16 are formed in a circumferential side of the upper cover 9, and the upper cover 9 is sleeved on the upper portion of the middle housing 24 and clamped together through the second buckles 16 and the clamping slots 15.

Three casing joint in proper order is in the same place, and the installation is got up simple and conveniently, improves product production efficiency, and every buckle position sets up rationally simultaneously, and the shaping of the casing of being convenient for makes things convenient for the drawing of patterns, and this device block effect is stable simultaneously, is difficult to the dropout, extension fixture life greatly.

Refer to fig. 1, 2, 3, 11, 13, a plurality of miniature gas pocket 17 has been seted up on middle part casing 24, miniature gas pocket 17 and second air cavity 4 intercommunication, the gas pocket sets to miniature, when guaranteeing to exhaust, it is inside effectively to prevent that external particle impurity from getting into the sensor, because this device is provided with miniature gas pocket 17, guarantee that the inside atmospheric pressure of second air cavity 4 is more stable in the use, very big reduction rubber diaphragm 35 upper portion atmospheric pressure resistance, reduce the negative effects because of the unstable emergence of upper portion atmospheric pressure brings, improve the accuracy of water level detection, reduce the degree of difficulty of water level sensor calibration.

The number of the micro air holes 17 is the same as that of the second buckle 16, the micro air holes 17 are located under the second buckle 16, the micro air holes 17 are arranged under the second buckle 16, demolding of a mold is facilitated, and difficulty in manufacturing the shell is reduced.

Referring to fig. 4 and 12, the supporting plate 28 extending outward is integrally formed on the upper portion of the middle housing 24, the supporting plate 28 is located below the terminal portion 7, the upper cover 9 is integrally formed with two side baffles 37 extending outward, the two side baffles 37 are disposed on two sides of the terminal portion 7, the inner side of the bottom end of each side baffle 37 is provided with a third buckle 29 integrally formed, the upper cover 9 is clamped with the supporting plate 28 of the middle housing 24 through the third buckle 29, the clamping connection strength between the housings is ensured, meanwhile, a good limiting and guiding effect is achieved, and the assembly of the harness head 31 is facilitated.

Referring to fig. 1, 5 and 8, the vertical section of the rubber diaphragm 35 is wave-shaped, an annular protrusion 21 protruding upwards is arranged on the outer circumference of the rubber diaphragm 35, an annular groove 20 is arranged on the bottom surface of the protruding part at the bottom end of the middle shell 24, and the annular protrusion 21 is embedded inside the annular groove 20.

The annular bulge 21 of the rubber diaphragm 35 is clamped tightly through the annular groove 20, the inner and outer circumferential surfaces of the annular bulge 21 are tightly attached to the inner wall of the annular groove 20, secondary sealing is achieved, the sealing performance of the first air cavity 3 is guaranteed, meanwhile, the middle shell 24 is pressed downwards, the annular bulge 21 is tightly pressed on the horizontal flange of the air inlet cover 23, tertiary sealing is achieved, the fact that the air in the first air cavity 3 cannot enter the second air cavity 4 is guaranteed, and the water level detection accuracy is improved.

Referring to fig. 1 and 9, the rubber diaphragm 35 is supported on the upper portion of the air inlet cover 23, and in an initial state, the rubber diaphragm 35 is stably supported above the air inlet cover 23, so that stability of initial frequency is ensured, and adjustment of internal frequency during production is facilitated.

23 upper portions of air inlet cover are equipped with protruding 22 of a plurality of bar, and rubber diaphragm 35 mid-plane supports on protruding 22 of bar, supports rubber diaphragm 35 through protruding 22 of a plurality of bars, prevents that rubber diaphragm 35 from separating first air cavity 3 and the suction nozzle 1 chamber of admitting air, and when suction nozzle 1 admits air, rubber diaphragm 35 bottom stress surface is bigger, the atress is more even, prevents rubber diaphragm 35 inclined motion.

Protruding 22 of a plurality of bar is along the radial setting of lid that admits air 23, and protruding 22 of a plurality of bar is the circumference equidistant and arranges, and when rubber diaphragm 35 sat on protruding 22 of bar, the interval between every two protruding 22 of bar is the same, and when admitting air of suction nozzle 1, guarantees that gaseous homodisperse reaches rubber diaphragm 35 bottom surface.

Referring to fig. 1 and 8, the ejector rod support 19 includes a cylindrical portion vertically and concentrically arranged, a disc portion, a magnetic core 18 is sleeved on the cylindrical portion, a plurality of first through holes 32 are formed in the circumferential side of the disc portion, a plurality of first protrusions 2 are formed in the middle upper surface of the rubber diaphragm 35, the first through holes 32 are buckled on the first protrusions 2, the ejector rod support 19 is convenient to fix and assemble, the length of the magnetic core 18 is larger than that of the cylindrical portion of the ejector rod support 19, an ejector rod cap 12 is inserted in the top end of the magnetic core 18, a nut 10 is connected to the upper end of the upper cover 9 in a threaded manner, a spring 11 is arranged between the nut 10 and the ejector rod cap 12, a soft connection is adopted between the ejector rod cap 12 and the nut 10, the rubber diaphragm 35, the ejector rod support 19, the ejector rod cap 12, the magnetic core 18 and the nut 10 are.

Referring to fig. 3, 5 and 11, an outwardly extending support plate 28 is integrally formed on the upper portion of the middle housing 24, the support plate 28 and the terminal portion 7 are located on the same side in the extending direction, a T-shaped limit boss 25 is disposed between each two terminals of the terminal portion 7, a vertical plate of the limit boss 25 points to the outside, and the limit boss 25 and the support plate 28 are integrally formed.

Referring to fig. 3, the limiting boss 25 and the middle housing 24 are integrally formed, the limiting boss 25 replaces a traditional water blocking rib, no obstacle is arranged on the upper portion of the limiting boss 25, the terminal portion can be installed and fixed on the terminal fixing portion (40) firstly during assembly, then the connection is carried out, after the assembly of the internal components is completed, the housing is closed through the upper cover 9 finally, the installation is completed, the installation of the terminal portion 7 and the installation of the internal components are greatly facilitated, and the assembly efficiency is improved.

Referring to fig. 1, 2 and 7, a wire harness head 31 is clamped on one side of the upper cover 9, which is located at the extending side of the terminal part 7, a jack hole for inserting the terminal part 7 is formed in the wire harness head 31, a fourth buckle 30 protruding downwards is arranged at the clamping position of the wire harness head 31, a limiting strip 8 is integrally formed on one side of the upper cover 9, which is located at the extending side of the terminal part 7, the setting direction of the limiting strip 8 is perpendicular to the terminal part 7, and the fourth buckle 30 is buckled on the limiting strip 8 from the upper side;

adopt the mode installation pencil head 31 of joint, it is simple and convenient to install, because spacing rectangular 8 and the 9 integrated into one piece of upper cover at joint position, when pencil head 31 receives external force and pulls the effect, the pulling force will be used on whole upper cover 9, and it is stable firm to use, extension fixture life greatly.

Referring to fig. 3, 5, 10 and 11, three limiting lugs are arranged on the periphery of the upper limiting part 38 of the coil support 14, a U-shaped limiting groove 26 is formed in the periphery of the upper end of the middle shell 24, the limiting lugs are arranged in the limiting groove 26, the position of the coil support 14 is limited through the limiting groove 26, the coil support 14 is prevented from shaking left and right, the limiting lugs can conveniently slide into the limiting groove 26, and the assembly difficulty is reduced.

Third through-hole 34 has been seted up on the spacing ear, all be equipped with a second arch 27 in the middle of every spacing groove 26, second arch 27 runs through when spacing ear arranges spacing groove 26 in and inserts and establish in third through-hole 34, and the protruding 27 positions of second adopt ultrasonic bonding, under spacing groove 26 and the protruding 27 dual function of second, stable firm fixes coil support 14 position inside middle part casing 24, and the protruding 27 of second provides convenience for ultrasonic bonding simultaneously.

The height of the second protrusion 27 is lower than the depth of the limiting groove 26, so that the limiting lug of the coil support 14 slides into the limiting groove 26, and then the second protrusion 27 passes through the third through hole 34, thereby facilitating the installation of the coil support 14.

Referring to fig. 5 and 13, a U-shaped clearance groove 41 is disposed below each limit groove 26, and an opening at the bottom end of the U-shaped clearance groove 41 is communicated with the second air cavity 4, so as to facilitate positioning of the mold.

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model thereof, the technical solution, concept and design obtained by equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a water level sensor of inner space wholeization, includes the sensor housing, the inside inductance coils subassembly that is equipped with of sensor housing and the magnetic core subassembly that is used for cutting the electromagnetic wire, a serial communication port, the sensor housing includes air inlet cover (23), sets up at middle part casing (24) of air inlet cover (23) top, sets up upper cover (9) in middle part casing (24) top, air inlet cover (23), middle part casing (24), upper cover (9) are together fixed through the mode of joint, air inlet cover (23) bottom is equipped with suction nozzle (1), integrated into one piece has shrouding (36) that the level set up in the middle of middle part casing (24), second through-hole (33) have been seted up in the middle of shrouding (36), it is equipped with rubber diaphragm (35) to press between middle part casing (24) and air inlet cover (23), the inside cavity of sensor housing passes through rubber diaphragm (35), The sealing plate (36) is divided into a first air cavity (3), a second air cavity (4) and a third air cavity (6), and the second air cavity (4) and the third air cavity (6) are communicated through a second through hole (33);

the inductance coil assembly comprises a coil support (14), the coil support (14) is fixed inside a middle shell (24), the coil support (14) comprises an upper limiting part (38), a middle winding part and a lower limiting part (39) which are integrally formed, a groove spanning plate (13) is arranged below the upper limiting part (38), an enameled wire is wound on the middle winding part, a terminal fixing part (40) is arranged on one side of the upper limiting part (38), a terminal part (7) is fixed on the terminal fixing part (40), and the terminal part (7) is electrically connected with the enameled wire;

the lower limiting part (39) is arranged in the second through hole (33) and is flush with the sealing plate (36), and an air-permeable gap is reserved between the peripheral side of the lower limiting part (39) and the inner wall of the second through hole (33).

2. The water level sensor with a clean internal space as claimed in claim 1, wherein the coil holder (14) is provided with three limit lugs around the upper limit portion (38), the middle housing (24) is provided with a U-shaped limit groove (26) around the upper end, and the limit lugs are disposed in the limit grooves (26).

3. The water level sensor with the integrated inner space as claimed in claim 2, wherein the limiting lugs are provided with third through holes (34), a second protrusion (27) is arranged in the middle of each limiting groove (26), when the limiting lugs are arranged in the limiting grooves (26), the second protrusions (27) are inserted into the third through holes (34), and the positions of the second protrusions (27) are welded by ultrasonic waves.