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Water level sensor for home appliance

A technology for water level sensors and home appliances, which is applied in the direction of displaying liquid level indicators through pressure measurement, which can solve the problems of large internal stress of the coil and low accuracy of water level measurement.

Active Publication Date: 2012-01-25
合肥神林电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The present invention solves the problem of low measurement accuracy of the water level of the existing water level sensor and the problem of high internal stress of the coil generated by the sensor output connector

Method used

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  • Water level sensor for home appliance
  • Water level sensor for home appliance
  • Water level sensor for home appliance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The water level sensor for household appliances in this embodiment includes an air cover 1, a housing 2, a diaphragm 3, a diaphragm plate 4, an iron core 5, an adjusting screw 6, a spring 7, and a coil unit. The diaphragm is installed in the air cover, and the diaphragm The deformable protrusion 301 is matched with the hole 401 on the diaphragm plate. The diaphragm plate has an outwardly stretched claw structure 402. The iron core is sleeved on the claw structure. The rebound of the claw makes the iron core Positioned on the diaphragm plate, the adjusting screw cooperates with the internal thread 201 of the assembly hole on the housing through the external thread 601, and the spring is arranged between the adjusting screw and the diaphragm plate, and the characteristic is that the housing presses Into the air cover, the protrusion 202 on the shell cooperates with the recess 101 on the air cover to position the shell in the air cover, and the coil unit is as Figure 7 , ...

Embodiment 2

[0048] Different from Embodiment 1, the capacitor can be as Figure 9 , Figure 10 , Figure 11 The two pins of the capacitors 15 and 16 shown are respectively bent and deformed and then loaded into the coil shaft. Capacitor pin processing of this shape can enable two capacitors to be packed into a smaller housing space.

Embodiment 3

[0050] Different from Embodiment 1, such as Figure 12 , Figure 13 , Figure 14 , Figure 15 As shown, the housing is provided with a socket structure 205. After the coil unit is positioned inside the housing, the three connection terminals 10, 11, and 12 are respectively located in the three output windows 2051, 2052, and 2053 of the socket. The socket is provided with a docking chute 2054, and a protrusion 20541 is provided on the chute.

[0051] Figure 14 For the connector that matches the socket structure of this embodiment, the interfaces 1701, 1702, and 1703 of the connector are respectively connected to the output windows 2051, 2052, and 2053 on the housing, and the locking piece 1704 on the connector is inserted into the socket structure on the housing. The docking chute 2054, the protrusion structure 17041 on the locking piece is positioned with the protrusion 20541 on the chute.

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PUM

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Abstract

The invention provides a water level sensor for home appliance with high measurement accuracy. The coil unit of the sensor comprises a coil shaft, three connection terminals and two capacitors, wherein the coil shaft is provided with a coil; the connection terminals A and B of three connection connectors are provided with a coil winding bending structure, a positioning embossment and an embossment; the connection terminals B is provided with a blending structure and a positioning embossment; the reserve surface of the coiling side of the coil shaft is provided with three through grooves; the connection terminal A is inserted into a through groove A and is positioned on the coil shaft through the positioning embossment and the winding blending structure of the connection terminal A; the connection terminal B and the connection terminal C are arranged in the same way corresponding to the connection terminal A; two pins of the capacitor A of the two capacitances firstly pass through two positioning holes of the coil shaft and respectively are connected with the embossment of the connection terminals A and the positioning embossment of the connection terminal B, and two pins of the capacitor A of the two capacitances firstly pass through two positioning holes of the coil shaft and respectively are connected with the embossment of the connection terminal C and the positioning embossment of the connection terminal B; and the coiling initiating end and the coiling ending end of the coil are respectively connected to the winding blending structures of the connection terminals A and C to form an LC coil unit. The invention is suitable for being used as the water level sensor.

Description

technical field [0001] The invention relates to a water level sensor utilizing the principle of coil inductance change caused by pressure change. Background technique [0002] At present, the most widely used water level sensor for household appliances uses the following principle: the water pressure is transmitted to the sensor air chamber through the air pipe, and the diaphragm is affected by the air pressure to overcome the rebound force of the spring to drive the ferrite iron core to move towards the coil, and the iron core is inside the coil. When the movement occurs, the inductance (L) of the coil and the displacement of the iron core change approximately linearly. The relationship between the displacement of the iron core in the coil and the output inductance is as follows: figure 1 shown. [0003] Conventional sensors such as figure 2 As shown, it includes gas cover a, housing b, diaphragm c, diaphragm plate d, iron core e, adjustment screw f, main spring g, adjus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/14
Inventor 王华劳维煊
Owner 合肥神林电子有限公司