KR0127719Y1 - Water level sensing apparatus of water purifier using change of magnetic field - Google Patents

Abstract

The present invention relates to a device for detecting the water level of the water purifier, and more particularly, to a water level detection device of the water purifier for detecting the water level by measuring the fluctuation of the magnetic field changes according to the water level.

Water level detection device of the water purifier of the present invention is installed in the interior of the purified water storage tank is sealed to block the inflow of purified water and has a space therein, a plurality of spaced at regular intervals to be installed inside the case It is characterized by consisting of a magnet, a magnetic field detection sensor for detecting a magnetic field change of the plurality of magnets and a float surrounding the outer circumferential surface of the case and moving in accordance with the water level.

Description

Water level sensor of water purifier using the change of magnetic field

1 is a schematic configuration diagram of a water purifier conventionally used.

Figure 2 is a side cross-sectional view showing the position of the water level sensor installed in the purified water and cold water storage tank.

3 is a side cross-sectional view of the water storage tank in which the water level sensor according to the present invention is installed.

4 is a block circuit diagram to which the water level sensor according to the present invention is connected.

* Explanation of symbols for main parts of the drawings

1: raw water valve 2: high turbidity filter

3: settling filter 4: pump

5: all carbon filter 6: membrane filter

7: wastewater regulator 8: fucarbon filter

9: sterilization filter 10: purified water storage tank

10-1: cold water storage tank 11: case

12: float 13: magnet

14: sensor 14-1, 14-2, 14-3: magnetic field sensor

15: electric wire 16: display setting part

17: main control part 18: fixed protrusion

100, 120: common sensor 101, 121: lower sensor

102, 122: low sensor 103, 123: high sensor

104: overflow sensor

The present invention relates to a device for detecting the water level of the water purifier, and more particularly, to a water level detection device of the water purifier for detecting the water level by measuring the fluctuation of the magnetic field changes according to the water level.

The use of water purifiers is gradually spreading due to the increase of distrust in tap water due to environmental pollution. A water purifier is a device for filtering natural water such as tap water or weak water (hereinafter referred to as raw water). The water is passed through various kinds of filtering means to remove foreign substances or harmful substances contained in raw water, Provide drinking water to be included. Various kinds of water purifiers as described above are used, and the reverse osmosis type water purifier may be referred to as a representative one. The reverse osmosis water purifier purifies raw water by using a so-called reverse osmosis filter (hereinafter referred to as a membrane filter). The membrane filter is formed of a plurality of pores having a very small diameter to remove foreign substances or harmful substances.

1 and 2 illustrate an example of a configuration of a conventional reverse osmosis filtration water purifier.

As shown, the water purifier is a raw water valve 1 for controlling the supply of raw water such as tap water or natural water, and a high-purity filter for filtering the residue of relatively large particles in the raw water passing through the raw water valve 1. (2), a precipitation filter (3) for filtering the residue of relatively small particles not filtered while passing through the high turbidity filter (2), and a pressurizing pump (3) for moving the supplied raw water to a predetermined pressure. ), An all carbon filter 4 for removing chlorine components and odors in raw water, a membrane filter 6 for removing ionic heavy metals remaining in raw water passing through the all carbon filter 4, A wastewater regulator 7 for adjusting the drinking water to wastewater separation ratio of the raw water passing through the membrane filter 6 and discharging the wastewater, and for removing chlorine component or odor contained in the drinking water passing through the membrane filter 6. after The filter 8 and a sterilization filter 9 for removing the bacteria in the raw water passing through the fucarbon filter 8, the purified water passed through the sterilization filter 9 flows into the storage tank. .

The all-carbon filter 5 and the fucarbon filter 8 are the same as activated carbon mainly containing carbon, and remove chlorine component particles and odor contained in raw water. The pump 4 is for moving the raw water to a very high pressure. This is related to the operation state of the membrane filter 6, because the water purification is performed in the membrane filter 6 only when the raw water is supplied at a pressure of 60 psi or more on average. The membrane filter 6 is especially operated at high pressures and is very sensitive to temperature, which will damage the filter if it is outside the temperature range of 5-40 ° C. The post carbon filter 8 through which the purified water discharged from the membrane filter 6 passes is essentially the same as the all carbon filter 5, and also performs the same function. The purified water that has passed through the after carbon filter 8 is discharged through the sterilizing filter 9 for removing bacteria contained in the purified water later.

The purified water discharged through the above process is first stored in the purified water storage tank 10. In particular, in a water purifier having a cooling function for simultaneously storing cold water, the filtered purified water is supplied to the cold water storage tank 10-1 together with the purified water storage tank 10. Each water tank (10, 10-1) is further provided with a water level sensor for measuring the water level of the purified water. In addition, although not shown in the cold water storage tank 10-1, a cooling device for cooling the purified water is further installed.

2 shows a plurality of sensors for detecting the water level installed in the purified water and cold water storage tanks 10 and 10-1, respectively. Common sensors 100 and 120 that perform common terminal roles are installed on the bottom surfaces of the purified and cold water storage tanks 10 and 10-1, and lower sensors 101 and 121 and lower portions of the common sensors 100 and 120. The low sensors 102 and 122 are installed on the sensors 101 and 121, and the high sensors 103 and 123 are installed on the low sensors 102 and 122, respectively. The purified water storage tank 10 has an integer greater than the uppermost side. The overflow sensor 104 for detecting the state is further installed. The sensors are devices that sense a change in resistance caused by water and thus generate different electrical signals. In addition, although not shown, the cold water storage tank 12 is further provided with a temperature sensor for measuring the temperature of the purified water.

However, there is a difficulty in accurately measuring the water level in the conventional water purifier as described above. That is, the above sensors measure the resistance value of the integer and detect the change of voltage or current according to the resistance value. However, since the resistance value of the purified water is very high, voltage or current could not be measured accurately. Usually, the resistance value of an integer is in the very high range of 400 kV-8 kV.

The present invention has been made to solve the above problems, an object of the present invention is to provide a water level detection device that can accurately measure the water level of the purified water stored in the storage tank of the water purifier.

Another object of the present invention is to provide a water level detection device of a water purifier capable of detecting a water level by measuring a magnetic field that changes according to the change of the water level.

The water level detection device of the water purifier of the present invention for achieving the above object is to be installed in the interior of the purified water storage tank is sealed so that the inflow of purified water is blocked and has a space therein, and to be installed inside the case It consists of a plurality of magnets spaced apart from each other, a magnetic field sensing sensor installed in a position adjacent to the magnet to detect the magnetic field change of the plurality of magnets, and a float surrounding the outer peripheral surface of the case and moving according to the water level of the constant It is characterized by.

Hereinafter, the water level detection device of the water purifier of the present invention will be described in detail with reference to the accompanying drawings.

3 is a side cross-sectional view showing the installation state of the water level sensor according to the present invention. As shown, the case 11 is inserted into the purified water storage tank 10, the upper end of the case 11 is projected to the outside through the upper surface of the purified water storage tank 10. A plurality of wires 15 extend from the top surface of the protruding case 11. The wires 15 are connected to a plurality of magnetic field sensing sensors 14-1, 14-2, and 14-3, and the other end is connected to a main control part (17 in FIG. 4).

The case 11 is installed inside the purified water storage tank 10 but should be sealed to completely prevent inflow of purified water. A space is formed vertically inside the case 11, and a plurality of magnets 13 are installed at regular intervals along the space. The spacing between the magnets 13 is a position corresponding to the water level to be measured.

In addition, a plurality of magnetic field sensing sensors 14-1, 14-2, and 14-3 are provided adjacent to each magnet 12. The magnetic field sensing sensors 14-1, 14-2, and 14-3 are sensing sensors capable of measuring a change in a magnetic field, and are used to measure magnetic field changes of adjacent magnets. When a change in the magnetic field is detected, the magnetic field detection sensors 14-1, 14-2, and 14-3 output corresponding signals. The output signals are input to the main control unit 17 through the wire 15. .

The float 12 causes the magnetic field change in the magnet 13. The float 12 is moved along the outer circumferential surface of the case 11 and has a form surrounding the case 11 so as not to be separated from the case 11. If the case 11 is cylindrical, it will be apparent to those skilled in the art that the float 12 may have a doughnut shape, and if the case 11 is rectangular, the float 12 may have a rectangular shape. The float 12 is made of a light material floating in water, it is preferable to include a magnetic field generating material in the float 12 in order to improve the generating force of the magnetic field.

When the water level W of the purified water reaches the a position, the float 12 also reaches the a position, whereby a change in the magnetic field occurs in the magnet 13 inserted into the case 11. This magnetic field change is immediately detected by the magnetic field sensor 14-1 installed adjacent to the magnet 13 and outputs an electrical signal corresponding to the magnetic field change. The output signal is input to the main control unit 17 via the wire 15. The main controller 17 reads the signal input from the magnetic field sensor 14-1 for detecting the water level, determines which sensor the signal is input from, and measures the water level at any one of a, b, and c. . Since the water level always changes depending on the supply or use of the constant, the main controller 17 always measures the water level.

When the water level is measured, the main control unit 17 performs control according to a pre-stored program according to each water level. That is, when the water level a is set to the lowest water level, the main controller 17 opens the raw water valve 1 connected to the block circuit diagram of FIG. 4 to supply raw water when water level a is detected. In addition, by operating the pump (4) for forced movement to filter the raw water and by operating the sterilization filter (9) to sterilize the purified water.

In this way, the main controller 17 continuously measures the water level while the integer stroke is being performed. When the float level reaches the position of the water level b by raising the water level, the magnetic field change at the water level a is not detected because the float 12 has moved to the upper side. Instead, a magnetic field change occurs in the magnet 13 installed at the position of the water level b. Accordingly, an electric signal is output from the magnetic field sensor 14-2, and the signal is input to the main control unit 17. Therefore, the main control unit 17 detects the current water level. In addition, in order to prevent the float 12 from falling below the set minimum water level a, a fixing protrusion 18 capable of stopping the float 12 is formed at the water level a position.

In the above description, the water level sensor of the water purifier of the present invention detects three types of water levels of a, b, and c by using three magnets and a magnetic field sensor, but is more diverse by increasing the number of magnets and magnetic field sensors. It will be apparent to those skilled in the art that the present invention can be measured and adjusted.

As described above, according to the present invention, the water level of the purified water stored in the storage tank of the water purifier has an advantage of accurately measuring the water level regardless of the resistance value by detecting a change in the magnetic field.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that the present invention may be modified or changed within the spirit and scope of the present invention. something to do.

Claims (3)

As for measuring the water level of the purified water flowing into the purified water storage tank, which is installed in the interior of the purified water storage tank 10 is sealed to block the inflow of purified water and has a space therein (11); A plurality of magnets 13 installed at the inside of the case 11 and spaced apart at regular intervals; Magnetic field detection sensors 14-1, 14-2, and 14-3 which are installed at positions adjacent to the magnet 13 to detect magnetic field changes caused by the plurality of magnets 13; And a float (12) surrounding the outer circumferential surface of the case (11) and moving in accordance with the water level of the purified water. 2. The water level detecting device according to claim 1, wherein a magnetic field generating material is inserted in the float (12) to increase a magnetic field change amount. According to claim 1, wherein the fixing projections 18 on the outer surface of the case 11 in order to prevent the float 12 from falling below the position of the magnet 13 is installed at the bottom of the case (11) Water level detection device of the water purifier, characterized in that formed.