KR20090032348A - Water level sensor - Google Patents
Water level sensor Download PDFInfo
- Publication number
- KR20090032348A KR20090032348A KR1020070097512A KR20070097512A KR20090032348A KR 20090032348 A KR20090032348 A KR 20090032348A KR 1020070097512 A KR1020070097512 A KR 1020070097512A KR 20070097512 A KR20070097512 A KR 20070097512A KR 20090032348 A KR20090032348 A KR 20090032348A
- Authority
- KR
- South Korea
- Prior art keywords
- stem
- water level
- sensor
- magnet
- magnetic sensor
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
- G01F23/38—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0005—Geometrical arrangement of magnetic sensor elements; Apparatus combining different magnetic sensor types
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Level Indicators Using A Float (AREA)
Abstract
A water level sensor for detecting a water level is disclosed. The disclosed invention has an insert that is hermetically fixed to a wall of a water tank, the stem extending from the insert and having a space formed therein, which is provided inside the stem and is rotatably coupled to a stem and a magnetic sensor for detecting a change in magnetic force. It includes a plotter that is rotated to approach or away from the front end, and is provided with a magnet for generating a change in magnetic force with respect to the magnetic sensor. The invention is such that the floater is rotated according to the water level inside the tank, and the magnet of the plotter is approached to the magnetic sensor, thereby making it easy to detect the water level by the magnetic sensor, providing a compact operating range of the floater, and any position of the tank. The plotter can also be easily operated to obtain the benefits of easy placement in the bath.
Description
The present invention relates to a water level sensor, and more particularly, to a water level sensor for informing the change of the water level so that the water level changes in the inside of the tank can be seen from the outside.
In general, the water level sensor provided in the water tank to detect the water level is a magnetic sensor (lead switch, MR sensor, Hall sensor) inside the stem to guide the magnet and the inside of the bowl using a rectangular bowl or a circular bowl shape To detect the water level in the tank.
In other words, the beret is slidingly coupled to the stem, and is guided by the stem and flows up and down according to the water level of the tank. The magnet inside the beret causes a change in the magnetic field of the magnetic sensor in the stem. Flows or the voltage of the magnetic sensor is changed to detect the water level in the tank.
At this time, the causes of the defective phenomenon of the water level sensor are as follows. First, the detection failure of the water level sensor will be described. There are two main causes of detection failure. That is, the damage of the ferrite magnet and the damage of the reed switch due to the impact on the transportation and assembly process. Here, the breakage of the reed switch is caused by the impact, the irrational soldering process, the structure of the reed switch which is easily broken by the impact, and the mounting structure of the reed switch.
And, the breakage of the magnet is easily caused by the impact using a low-cost ferrite magnet. In addition, when a magnet with fine cracks is put into the process, cracks are enlarged during transportation and assembly of parts, causing damage.
The breakage of the reed switch is a breakage of the glass tube due to the impact, and if it is assembled in a state where a crack has occurred in the glass tube, no defect occurs during the inspection process or initial use of the product, but as time passes, inert gas in the glass tube leaks out. Corrosion of the internal terminals can cause detection failure due to short or deformation.
And, in the soldering process, the reed switch is a temperature sensitive component and requires great care when soldering. In general, soldering of a reed switch should be performed within 2 seconds at a temperature of 220 ° C. so that a defect does not occur. However, current reed switches are soldered manually by all types, and therefore the soldering temperature and time of the reed switches are not accurately observed.
In this case, defects are very likely to occur depending on soldering temperature, soldering time, operator's skill and working environment. In addition, if the temperature is excessively long during the brushing operation, the terminal of the reed switch may be pressed or plastic deformation may occur, thereby causing a defect.
In addition, the glass tube-type reed switch is very weak to shock, there is a root cause difficult to manage. In particular, when the working environment is poor, there is always a problem about quality due to impact or process problems.
In the structure of the reed switch, the 1-stage water level sensor is a structure in which a wire is connected to a switch without a separate PCB and then inserted into a stem. The reed switch is fixed with an epoxy mold. In this case, since the operation is performed without a separate guide and PCB, the positional deviation of the switch is large, and the breakage of the wire soldering portion or the glass tube breakage may occur during the insertion process of the reed switch.
In addition, the cause of the malfunction of the bure in the operation of the bure is caused by the biofilm. The bure and stem are made of lubricating acetal (POM) material and operate with the minimum friction area through the guide of the stem. (Burr), warpage or foreign matters caused by foreign matter.
In addition, the main cause of the failure of the fixing part in the failure of the fixing part of the reed switch is caused by the carelessness of the operator, which is a form that is damaged by giving a very strong impact during the cleaning of the main tank in which the reed switch is disposed.
On the other hand, the conventional water level sensor having a rectangular beret provides an operation method in which the operation of the beret is up and down along the water level, so that it can be attached only to the side or bottom of the tank, thereby limiting the position when placed on the inner wall of the tank. there was.
The present invention has been made to solve the above-mentioned problems of the prior art, and provides a water level sensor to improve the quality by fundamentally eliminating the cause of the failure of the conventional water level sensor, to provide flexibility in the operation of the arrangement inside the tank It is to provide a water level sensor provided.
The configuration of the water level sensor according to the present invention includes an insert that is hermetically fixed to the inner surface of the water tank, the stem extending from the insert portion is formed in the interior, the inside of the stem to detect a change in magnetic force And a plotter rotatably coupled to a sensor and the stem, the magnet being rotated to approach or move away from the tip of the stem and generate a change in magnetic force for the magnetic sensor.
Here, the insert portion of the stem includes an annular flange supported on the outer surface portion of the hole formed on the inner surface to easily fix the insert portion to the inner surface and a packing fitted to the insert portion and supported by the annular flange to be in close contact with the inner surface. do.
The insert may include a plurality of inserts that can be elastically changed in diameter while being inserted into the inner surface, and the inserts may include hooks to prevent separation from the inner surface.
In addition, a printed circuit board for supplying power to the magnetic sensor and providing the magnetic sensor in a surface mount method should be disposed in the space of the stem.
In addition, the space of the stem may be filled with an epoxy that protects the printed circuit board from impact.
The magnetic sensor may be any one of a reed switch, an MR sensor, and a hall sensor, and the magnet may be an ND magnet.
In addition, both sides of the plotter is formed with a rotating plate extending to both sides of the stem to be rotated to be coupled to both sides of the stem, the rotating plate is coupled to the rotating pin inserted through the rotating plate to the stem.
The floater is formed such that the rotating plate extends to both sides of the stem, and provides buoyancy in a water tank, and a buoyancy body on which one side of the magnet restrains the buoyancy body and the upper surface of the buoyancy body is sealed and the magnet It includes a cover plate for pressing and fixing.
The water level sensor according to the present invention configured as described above can fundamentally eliminate the cause of the defect of the water level sensor and reduce the cost, it is easy to determine the placement position in the water tank, especially applicable to the tank built-in structure such as bidet In the case of rectangular bures, it can be applied immediately to the current mass production.
Hereinafter, a preferred embodiment of a water level sensor according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.
In addition, the following examples are not intended to limit the scope of the present invention but merely presented by way of example, and there may be various embodiments implemented through the present invention.
Example
1 is a perspective view of a water level sensor according to an embodiment of the present invention, Figure 2 is a longitudinal cross-sectional view of Figure 1, Figure 3 is a functional diagram of FIG.
As shown in Figures 1 to 3, the water level sensor according to an embodiment of the present invention has an
At this time, the
Here, the
In addition, the
And, the
In addition, a
At this time, the
In addition, the remaining space of the
Meanwhile, the
In addition, both sides of the
In addition, the
The water level sensor according to an embodiment as described above is a variety of positions in which the
Then, the
1 is a perspective view of a water level sensor according to an embodiment of the present invention.
2 is a longitudinal cross-sectional view of FIG. 1.
3 is a functional diagram of FIG. 1.
<Explanation of symbols on main parts of the drawings>
100: stem 105: insertion part
106: annular flange 107: packing
108: insertion stand 109: hook
110: magnetic sensor 112: printed circuit board
120: plotter 122: magnet
123: epoxy 124: buoyant body
124a: settling groove 125: rotating plate
126: rotation pin 130: cover plate
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070097512A KR20090032348A (en) | 2007-09-27 | 2007-09-27 | Water level sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070097512A KR20090032348A (en) | 2007-09-27 | 2007-09-27 | Water level sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20090032348A true KR20090032348A (en) | 2009-04-01 |
Family
ID=40759181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020070097512A KR20090032348A (en) | 2007-09-27 | 2007-09-27 | Water level sensor |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR20090032348A (en) |
-
2007
- 2007-09-27 KR KR1020070097512A patent/KR20090032348A/en not_active Application Discontinuation
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101012039B1 (en) | Device for performing measurements and/or taking samples in molten metals | |
US20010023153A1 (en) | Process for the production of a position sensor and position sensor | |
KR101857896B1 (en) | Liquid quantity detection apparatus and fuel pump module provided with liquid quantity detection apparatus | |
JP2013064440A (en) | Valve for fuel tank | |
JP2006177938A (en) | Electronic calibration method of level sensor | |
KR20070116643A (en) | Self-contained and wireless monitoring device for a washing machine | |
JPWO2012127680A1 (en) | Fuel supply device | |
US20150247752A1 (en) | Liquid level detection device and method of manufacturing the same | |
KR20120139039A (en) | Sensor assembly for washing machine | |
KR20090032348A (en) | Water level sensor | |
KR101038121B1 (en) | Water Level Sensor | |
CN201364191Y (en) | Magnetic suspension type liquid level sensor | |
ATE393756T1 (en) | WATER DISPENSER WITH AIR INLET VALVE | |
KR101158660B1 (en) | Pressure sensor module for water level detecting | |
JP5941282B2 (en) | Solder bath | |
JP2020080228A (en) | Manufacturing method of sensor | |
CN208721197U (en) | A kind of durable water-level detecting device | |
CN211262379U (en) | Water level sensor | |
KR100716067B1 (en) | Sampling device for probe | |
JP2009524007A (en) | Container filling level detection device and method and container filling device | |
JP3760851B2 (en) | Liquid level detector | |
CN207280545U (en) | A kind of throw-in type liquid transmitter | |
JP2017180114A (en) | Submersible pump, and water level sensor of the same | |
CN205281755U (en) | Liquid level monitoring device | |
KR100216558B1 (en) | Apparatus of effective liquid quantity display in chemical medicine container |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E601 | Decision to refuse application |