A compact water level sensor for a washing machine

Abstract

The utility model provides a compact water level sensor for washing machine, including including shell and fixed ring, the shell lower surface evenly sets up five first threaded holes for fixed installation base, the shell top sets up the upper cover body, and the upper cover body upper surface fixedly pastes the fixed ring, and the fixed ring upper surface evenly sets up four second threaded holes, wherein, the upper cover body is by silica gel and is in the installation process of second threaded hole and first threaded hole effectively limits the form of upper cover body for controlling the thickness of water level sensor, the shell is used for the detection component of electromagnetic induction detection water level is provided in, and the upper cover body that the application adopts has more concrete need to adjust its change, thereby reduces the idle use ratio when using, and the precision of detection is not influenced under the compact structure, and moreover, simple structure, convenient installation, and applicable to more models, thereby make its reference more extensive when using.

Description

Technical Field

[0001] This specification relates to the field of water level sensor technology, and more particularly to a compact water level sensor for washing machines. Background Technology

[0002] The water level sensor is essentially a pressure switch. Once you set a pressure value, water pressure is generated after filling the machine. When the pressure value is reached, the power is automatically switched on, thus functioning as a switch. Washing machine water level switches come in two types: electronic (adjustable resistance) and switch. Both types work by using the air pressure generated when the water level rises, which is transmitted through a pipe to the sensor, causing a change in resistance or activating an internal switch to trigger the computer's action. Damage to the water level sensor can result in inaccurate water filling, prolonged water filling without operation, and failure to spin-dry the machine after draining the water.

[0003] The existing Chinese utility model patent (2019202508280), titled "Washing Machine Water Level Sensor," describes the device as follows: "The entire sensor structure is more compact, reducing the sensor's space occupancy. The PCB board is more securely mounted, preventing shaking and ensuring the inductor coil's connection wires remain relatively stationary with the PCB board, thus improving the sensor's lifespan. The entire inductor coil bracket adopts an integrated molding design, reducing the number of parts, simplifying assembly processes, and improving sensor assembly efficiency. The silicone diaphragm has a concave-convex structure in the middle, effectively fixing the connecting components. When the silicone diaphragm moves up and down, the magnetic core can rise and fall stably, greatly reducing the degree of external interference to the magnetic core. A pressure relief hole is provided to reduce water level measurement deviation and improve measurement accuracy." However, such a water level sensor is only suitable for a specific model and cannot meet the requirements of other models, thus failing to satisfy the needs of the existing technology. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a compact water level sensor for washing machines, including a housing and a fixing ring;

[0005] Five first threaded holes are evenly opened on the lower surface of the housing for fixing and installing the base;

[0006] An upper cover is provided above the housing, and a fixing ring is fixedly attached to the upper surface of the upper cover. Four second threaded holes are evenly opened on the upper surface of the fixing ring.

[0007] The upper cover is made of silicone and effectively restricts the shape of the upper cover during the installation of the second threaded hole and the first threaded hole, thereby controlling the thickness of the water level sensor.

[0008] The housing is equipped with a detection component for electromagnetic induction detection of water level.

[0009] Preferably, the detection component includes a coil and a magnetic post, the coil being located at the center of the bottom inside the housing, and the magnetic post being matched and disposed inside the coil.

[0010] Preferably, a coil frame is fixedly provided outside the coil, and a rubber sheet for isolation and sealing is provided at the top of the magnetic column, wherein the thickness of the rubber sheet in the middle is less than the thickness at the edge.

[0011] Preferably, an edge pad is provided at the edge of the rubber sheet, the thickness of the rubber sheet in the middle is 0.3 cm, and the thickness of the rubber sheet at the edge is 0.6 cm.

[0012] Preferably, an adjustment hole is provided at the center of the lower surface of the housing corresponding to the center of the coil frame. A knob is provided in the adjustment hole, and a spring is provided on one side of the knob for adjusting the movement range of the magnetic column.

[0013] Preferably, the outer shell is inlaid with a plastic layer.

[0014] As can be seen from the above, the compact washing machine water level sensor provided by this utility model is suitable for compact washing machines with limited internal space. In contrast, existing washing machine water level sensors have a larger structure and occupy more space during use. The upper cover of this application can be adjusted according to specific needs, thereby reducing idle usage. At the same time, the compact structure does not affect the accuracy of detection. Moreover, the structure is simple and easy to install, and it is applicable to more models, thus making it more widely used. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in one or more embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall first three-dimensional structure of the present utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall second three-dimensional structure of the present invention;

[0019] Figure 4 This is a cross-sectional view of the rubber sheet of this utility model.

[0020] In the diagram: 1. Shell; 11. Plastic layer; 12. Top cover; 13. Coil frame; 14. Adjustment hole; 15. Rubber sheet; 16. First threaded hole; 17. Magnetic post; 18. Edge gasket; 2. Fixing ring; 21. Second threaded hole; 22. Water inlet. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] Example 1:

[0024] like Figure 1-4 As shown, a compact water level sensor for a washing machine is proposed, comprising a housing 1 and a retaining ring 2;

[0025] Five first threaded holes 16 are evenly opened on the lower surface of the housing 1 for fixing and installing the base;

[0026] The upper cover 12 is provided above the housing 1, and a fixing ring 2 is fixedly attached to the upper surface of the upper cover 12. Four second threaded holes 21 are evenly opened on the upper surface of the fixing ring 2.

[0027] The upper cover 12 is made of silicone and effectively restricts the shape of the upper cover 12 during the installation of the second threaded hole 21 and the first threaded hole 16, thereby controlling the thickness of the water level sensor.

[0028] The upper cover 12 has a soft and non-stretchable plastic film on its inner wall to prevent the upper cover 12 from deforming under water pressure and affecting the detection effect.

[0029] The housing 1 is equipped with a detection component for electromagnetic induction detection of water level.

[0030] The detection component includes a coil and a magnetic post 17. The coil is located at the center of the bottom inside the housing 1, and the magnetic post 17 is matched and arranged inside the coil.

[0031] The movement of the magnetic column 17 in the coil generates an induced current, which is used to detect the water level.

[0032] An adjustment hole 14 is provided at the center of the lower surface of the housing 1, corresponding to the center of the coil frame 13. A knob is provided in the adjustment hole 14, and a spring is provided on one side of the knob for adjusting the movement range of the magnetic column 17.

[0033] The outer shell 1 is inlaid with a plastic layer 11.

[0034] The plastic layer 11 helps to improve the stability of the outer side during use and to reduce the vibration generated by the compact washing machine during operation, thus preventing the vibration from affecting the water level monitoring and reducing the failure rate of the equipment.

[0035] Example 2:

[0036] like Figure 1-4 As shown, a compact water level sensor for a washing machine is proposed, comprising a housing 1 and a retaining ring 2;

[0037] Five first threaded holes 16 are evenly opened on the lower surface of the housing 1 for fixing and installing the base;

[0038] The upper cover 12 is provided above the housing 1, and a fixing ring 2 is fixedly attached to the upper surface of the upper cover 12. Four second threaded holes 21 are evenly opened on the upper surface of the fixing ring 2.

[0039] The upper cover 12 is made of silicone and effectively restricts the shape of the upper cover 12 during the installation of the second threaded hole 21 and the first threaded hole 16, thereby controlling the thickness of the water level sensor.

[0040] The housing 1 is equipped with a detection component for electromagnetic induction detection of water level.

[0041] The detection component includes a coil and a magnetic post 17. The coil is located at the center of the bottom inside the housing 1, and the magnetic post 17 is matched and arranged inside the coil.

[0042] The movement of the magnetic column 17 in the coil generates an induced current, which is used to detect the water level.

[0043] An adjustment hole 14 is provided at the center of the lower surface of the housing 1, corresponding to the center of the coil frame 13. A knob is provided in the adjustment hole 14, and a spring is provided on one side of the knob for adjusting the movement range of the magnetic column 17.

[0044] The outer shell 1 is inlaid with a plastic layer 11.

[0045] The plastic layer 11 helps to improve the stability of the outer side during use and to reduce the vibration generated by the compact washing machine during operation, thus preventing the vibration from affecting the water level monitoring and reducing the failure rate of the equipment.

[0046] A coil frame 13 is fixedly installed outside the coil, and a rubber sheet 15 for isolation and sealing is provided at the top of the magnetic column 17. The thickness of the rubber sheet 15 in the middle is less than the thickness at the edge.

[0047] The lower thickness at the center of the rubber sheet 15 increases its sensitivity to pressure, thus greatly improving the accuracy of water level monitoring when used in a compact washing machine.

[0048] An edge pad 18 is provided at the edge of the rubber sheet 15. The thickness of the middle part of the rubber sheet 15 is 0.3 cm, and the thickness of the edge of the rubber sheet 15 is 0.6 cm.

[0049] The rubber sheet 15, together with the edge gasket 18, achieves a more stable sealing effect during use. Furthermore, the gasket 18 also helps to provide more stable support under repeated contraction and stretching.

[0050] Working principle: The internal space of a compact washing machine is limited, while the existing washing machine water level sensor has a large structure and occupies a lot of space during use. The upper cover 12 used in this application can be adjusted according to specific needs, thereby reducing the idle usage rate during use. At the same time, it does not affect the detection accuracy in a compact structure, and the structure is simple and easy to install.

[0051] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the scope of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this invention as described above, which are not provided in the details for the sake of brevity.

[0052] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A compact water level sensor for a washing machine, comprising a housing (1) and a retaining ring (2), characterized in that: The lower surface of the housing (1) has five first threaded holes (16) evenly provided for fixing the mounting base; The upper cover (12) is provided above the housing (1), and a fixing ring (2) is fixedly attached to the upper surface of the upper cover (12). Four second threaded holes (21) are evenly opened on the upper surface of the fixing ring (2). The upper cover (12) is made of silicone and effectively restricts the shape of the upper cover (12) during the installation of the second threaded hole (21) and the first threaded hole (16) to control the thickness of the water level sensor. The housing (1) is equipped with a detection component for electromagnetic induction detection of water level.

2. A compact water level sensor for a washing machine according to claim 1, characterized in that, The detection component includes a coil and a magnetic column (17). The coil is located at the center of the bottom inside the housing (1), and the magnetic column (17) is matched and arranged inside the coil.

3. A compact water level sensor for a washing machine according to claim 2, characterized in that, A coil frame (13) is fixedly installed outside the coil, and a rubber sheet (15) for sealing is provided at the top of the magnetic column (17). The thickness of the rubber sheet (15) in the middle is less than the thickness at the edge.

4. A compact water level sensor for a washing machine according to claim 3, characterized in that, An edge pad (18) is provided at the edge of the rubber sheet (15). The thickness of the middle part of the rubber sheet (15) is 0.3 cm, and the thickness of the edge of the rubber sheet (15) is 0.6 cm.

5. A compact water level sensor for a washing machine according to claim 2, characterized in that, An adjustment hole (14) is provided at the center of the lower surface of the housing (1) corresponding to the center of the coil frame (13). A knob is provided in the adjustment hole (14), and a spring is provided on one side of the knob to adjust the movement range of the magnetic column (17).

6. A compact water level sensor for a washing machine according to claim 1, characterized in that, The outer shell (1) is inlaid with a plastic layer (11).

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