KR101118916B1 - Water level displaying circuit for boiler of hot-water heating mat - Google Patents

Abstract

PURPOSE: A water level indicator of a boiler for a hot water mat, which can interact with an indirect water level sensor, is provided to enable a user to recognize a water level from outside. CONSTITUTION: A water level indicator of a boiler for a hot water mat comprises a detection unit(S100), an integrating unit(S200) and a display unit(S300). The vibration pulse voltage passing through a standard capacitor generates electrostatic capacity(CS) with the water of a water bottle(100) through a thin film type conductive material(1). The integrating unit integrates the mean voltage converted into direct current. The distributed capacity detected through the detection unit changes in the value of the electrostatic capacity into the inverse proportion.

Description

Water level display circuit of hot water boiler for hot water mat interlocking with indirect water level sensor {WATER LEVEL DISPLAYING CIRCUIT FOR BOILER OF HOT-WATER HEATING MAT}

The present invention is indirectly coupled to the water level detection sensor formed in the hot water boiler for hot water mat, the capacitance value and the reference capacitance value indirectly connected in a series of pulse voltage is divided by the capacitance value of each pulse voltage, to the detected capacitance value The water level display circuit converts an inverse pulse voltage into an average value DC voltage as an integrating circuit, compares the result, and guides the display unit according to the water level. More specifically, it is safe to detect the water level in the water tank indirectly. The number of hot water boilers for hot water mats linked with the indirect detection level detection sensor is characterized by precisely integrating the capacitive value into a DC value and accurately displaying the level guidance as well as allowing the user to easily identify it from the outside. It relates to a display circuit.

In general, the hot water mat is largely composed of a mat body 50, a hot water boiler 60 and the circulation hose 70 is formed to heat the time water.

At this time, the mat body 50 is formed to receive the circulation hose 70 inside and to be heated by hot water heated from the hot water boiler (60).

Thus, the hot water boiler 60, as shown in Figure 4, the main water bottle 100, the heating means 200 is formed to conduct indirect heat to the lower portion of the water tank, and to support and fix the heating means The cover 300 is formed so as to be large.

In this case, since the additional circulation pump and the control unit (PCB circuit board) formed in the hot water boiler corresponds to the conventional technology, a detailed description thereof will be omitted.

At this time, as shown in Figure 4, the water bottle 100, the coupling groove 120 is formed on the inner peripheral surface of the lower side of the lower housing 110 is opened, a plurality of fixing on the outer peripheral side of the coupling groove 120 Ball 130 is formed, the bracket 140 having a fitting groove 141 and the anti-vibration pad 142 is formed on any one side and the other side of the interval between the fixing hole 130, the of the housing 110 An injection port 150 and a stopper 160 for water supply are formed at an upper portion, and a circulation pipe coupled to a connection pipe such that heated water is circulated to the hot water mat by a pump at one side and the other side of the outer circumferential surface of the housing 110 ( 170) and the pumping pipe 180 is provided.

That is, the water bottle is formed in the coupling groove is formed in the lower opening, which is formed so that the heating means to be described later is received and coupled.

At this time, the fixing hole is formed to support and fix the heating means corresponding to the coupling hole of the cover to be described later.

In addition, the bracket is coupled to the anti-vibration pad to the fitting groove is fixed to the inside of the hot water heater body, that is, the case, is formed to prevent shaking by the circulation pump.

In this case, an injection hole for water supply is formed at an upper portion of the water bottle, and the injection hole is formed to be opened and closed by a screw fastening stopper.

At this time, the water bottle 100 is preferably coupled to the indirect contact level sensor 190 on one side of the outer peripheral surface.

That is, the water level sensor is coupled to one side of the outer wall of the enclosure to indirectly check the water level, which is also non-contact with water, which improves electrical safety, and is characterized in that it is particularly coupled externally.

At this time, the heating means 200 is formed with a heating plate 210 that is coupled to correspond to the coupling groove 120 to seal the lower opening of the water bottle 100 and conduct heat generated at the same time, the heating plate 210 The lower portion of the) is formed with a slider 220 is formed by the bent portion 221, the storage space 222, the guide is inserted into the storage space 222 of the slider to indirectly generate heat to the heating plate 210. The heater 240 supported by the plate 230 is made of a combination.

At this time, the heating plate is formed in the sanding surface of the concave-convex shape sanded on the upper, lower surface, the insulating film 212 is formed to be coupled to each of the sanding surface by thermal compression, the discharge from the heater (induction) Absorbing and isolating the electric field between the insulating films 212 of the heating plate, thereby shielding (grounding) the isolated electric field by the connection line of the ground search circuit while preventing the electric field from being induced to the water side in the water bottle; In the withstand voltage certification test according to a separate electrical safety certification test, the water side and the heater side in the water bottle maintain the independent insulation degree by the heating plate 210 having the insulation film 212 so that the withstand voltage according to the certification test is shielded; .

Thus, the insulating film 211 of the heating plate is made of a polyamide resin having a high heat resistance, high ductility, and high insulation, preferably, the thickness is 0.03 ~ 0.15mm.

That is, the polyamide resin provides high heat resistance, high ductility, and high insulation, which is significantly improved compared to the conventional resin (fluorine resin-teflon; ceramic material) coating method, whereby insulation is largely secured, and flexible characteristics Not only is the mechanical safety (scratches, cracks, cracks, etc.) improved but also the induced electric field is completely shielded and induced.

At this time, when the thickness of the polyamide resin is 0.03mm or less, sufficient insulation is not secured, and when the thickness is 0.15mm or more, the deposition property is reduced.

On the other hand, the heating plate 210 is preferably made of a high conductivity aluminum material, more preferably it is preferable to increase the efficiency by coating a high conductivity material on the outer peripheral surface of the heating plate.

At this time, the heating plate is coupled to correspond to the coupling groove of the water bottle, it is preferable that the waterproof packing (silicon material) is coupled to the outer circumferential surface of the heating plate by using the fitting groove. This corresponds to the fixing hole of the cover to be described later to promote waterproofing and sealing.

On the other hand, the cover 300 supports the heating means 200 and a plurality of coupling holes 310 are formed on the outer circumferential surface to be coupled to the fixing hole 130 of the water bottle, which is generated from the heater 240 on the surface. The grill 320 is provided to emit heat to the outside. That is, the cover is formed to stably fix the heating means to the bottom of the water bottle while releasing the heat generated from the heating means quickly.

In other words, the hot water boiler 60 is a hot water tank formed to temporarily collect the water transported through the separate motor pump and the circulation hose 70 formed inside, and instantaneous heating, and is installed inside the hot water tank, And a heater configured to heat the water to a set temperature, and a controller configured to control the set temperature of the heater or to control the operation of the motor pump.

At this time, the above-described conventional water bottle 100 is formed to attach the water level sensor 190 to one side to detect the water contained therein.

However, as shown in FIG. 5, the conventional water level sensor 190 is designed for capacitive sensing type sensing using a condenser, but the capacity of such a condenser generally adopts a sensing capacity based on 1PF, thereby generating steam due to boiling water. In addition, the wires and other structures that cross the outer periphery of the water tank react sensitively to the change in the microcapacity and read as if the water does not fill the water bottle, causing a malfunction.

In addition, the detected water level is simply a circuit, so that it is difficult for a user to grasp the water level from the outside.

As a result, it is difficult to commercialize the product because it is not satisfied with the level regulation of consumers recently legislated, and a situation in which a means for identifying the level is required.

The present invention is to solve the above-mentioned problems, the technical gist of the indirectly detected capacitance value and the reference capacitance value connected to the water level detection sensor formed in the hot water boiler for hot water mat is connected to the pulse voltage in series The water level display circuit for converting a pulse voltage, which is inversely proportional to the detected capacitance value and converts it into an average DC voltage as an integrating circuit, compares it and guides it to the display unit according to the water level. Indirect detection level, characterized in that the detection of the water level indirectly, safe and accurate integration of the detected capacitance value to the average value of the direct current, the displayed level guidance is precise, as well as the user can easily identify it from the outside Level display of hot water boiler for hot water mat interlocking with detection sensor In the providing it is an object.

In order to achieve the above object, the present invention is a thin film conductor 1 is attached to one side of the outer circumferential surface of the water container 100 mounted inside the hot water boiler 60 for hot water mat to sense the water level of the water contained in the water tank in the form of a plate. However, the thin film conductor 1 is formed so that the area of the thin film in the form of a plate senses the dielectric constant generated from the water in the water bottle at a high capacity and reads the detected capacitance value onto the circuit, and the outer circumferential surface of the thin film conductor 1 The insulating tape 2 is formed to be in close contact with the shape corresponding to the shape of the insulating tape 2 and is pressed against the outside so as to prevent the thin film conductor 1 and the insulating tape 2 from being separated, thereby maintaining a firm attachment state. Indirectly detectable water level check that spring (3) is formed, support (4) configured to support the compression spring and to be fixed to outer wall of water bottle Being a sensor (S) formed; The water level detection sensor (S) is provided with an oscillator (Oscillator) to detect the distribution capacity (Y-Capacitor) between the circuit and ground in accordance with the water level in the water tank, the vibration pulse generated in the oscillator is a reference capacitor (CR) ), The vibration pulse voltage via the reference capacitor (CR) generates an electrostatic capacitance (CS) indirectly with water in the water tank (100) through the thin film-shaped conductor (1), and the capacitance (CS) ) Is a detector (S100) for conducting with the heater 240 formed inside the water bottle to detect the distribution capacity (Y-Capacitor); The distribution capacitor (Y-Capacitor) detected through the detection unit (S100) changes in inverse proportion to the value of the capacitance (CS), and when the value of the largest capacitance (CS) is read when the water level is high, the integral voltage (C) An integrating unit (S200) for integrating the averaged voltage, which is the lowest value and the DC voltage is increased so that the integral voltage (C) is the highest when the smallest capacitance (CS) value is read when the water level is low; At least four voltage comparators are formed at the rear end of the integrator S200, and a plurality of comparison resistors R1 to R4 in a range of V _VLOW to V _HIGH according to an inverting input are provided to integrate the voltage C. If the V _LOW or less, all of the LEDs (L1 ~ L4) is turned on to display the highest level, and if the integral voltage (C) is more than V _HIGH, the display unit (S300) to turn off all of the LED (L1 ~ L4) to display the minimum level )end; It is made up.

At this time, the detection unit (S100) is for the discharge of the reference capacitor (CR) and the capacitance (CS) to achieve a continuous normal oscillation after initialization at the time of switching (+ waveform OR-waveform switching) of the pulse waveform generated from the oscillator. It is preferable that the ids D1 and D2 be further laid.

As described above, the present invention is connected to the water level detection sensor formed in the hot water boiler for the hot water mat indirectly detected capacitance value and the reference capacitance value is connected in series with the pulse voltage, the capacitance value of each pulse voltage is divided and detected capacitance It is related to the water level display cycle ¡¡which converts the pulse voltage which is inversely proportional to the value into an average DC voltage as an integrated circuit and compares it to guide the display unit according to the water level. Accurately integrating the detected capacitance value into an averaged DC value, the displayed water level guidance is accurate, as well as the user can easily identify it from the outside.

1 is an exemplary view showing a water level display circuit according to the present invention;
2 is an exemplary view showing a water level detection sensor according to the present invention;
3 is an exemplary view showing a system of a general hot water mat,
4 to 5 is an exemplary view showing a conventional hot water boiler and water level control sensor.

The following describes the present invention in more detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the present invention is largely comprised of a detection unit S100, an integration unit S200, and a display unit S300.

At this time, the detection unit (S100) is a thin film conductor (1) is attached to one side of the outer circumferential surface of the water container 100 mounted inside the hot water boiler 60 for hot water mat to sense the water level of the water contained in the water tank in the form of a plate. The thin film conductor 1 is formed such that the area of the thin film in the form of a plate senses the dielectric constant generated from the water in the water bottle at a high capacity and reads the detected capacitance value onto the circuit, and corresponds to the outer circumferential surface of the thin film conductor 1. An insulating tape 2 is formed to be in close contact with each other to form insulation, and a compression spring is pressed to the outside to maintain separation between the thin film conductor 1 and the insulating tape 2. 3) is formed, the indirect detection type water level detection sensor (S) consisting of a support (4) configured to support the compression spring and to be fixed to the outer wall of the water bottle Doedoe; The water level detection sensor (S) is provided with an oscillator (Oscillator) to detect the distribution capacity (Y-Capacitor) between the circuit and ground in accordance with the water level in the water tank, the vibration pulse generated in the oscillator is a reference capacitor (CR) ), The vibration pulse voltage via the reference capacitor (CR) generates an electrostatic capacitance (CS) indirectly with water in the water tank (100) through the thin film-shaped conductor (1), and the capacitance (CS) ) Is conducted to the heater 240 formed inside the water bottle to detect the distribution capacity (Y-Capacitor).

At this time, the detection unit (S100) is for the discharge of the reference capacitor (CR) and the capacitance (CS) to achieve a continuous normal oscillation after initialization at the time of switching (+ waveform OR-waveform switching) of the pulse waveform generated from the oscillator. It is preferable that the ids D1 and D2 be further laid.

In more detail, when there is no water inside the water bottle, the water is gradually filled by the water supply. At this time, the outside of the water bottle is attached to the outer surface of the water bottle in the form of a thin film in the form of a wide rectangular plate of aluminum foil. As a result, the rectangular foil-shaped silver foil has the water bottle (plastic) as an insulator, and the inner water has an electrode as one conductor, and the outer thin film conductor (silver foil) also has an electrode as one conductor. The dielectric constant (rate at which the electric field is transmitted) is formed.

Therefore, the thin film-shaped conductor in the form of a foil paper starts to detect the dielectric constant from the water filling up in the water bottle, which is applied by a dedicated chip (capacity sensing electronic chip generally used in the market) that reads the capacitance value formed on the substrate PCB circuit. It is configured to read the capacitance value onto the circuit.

That is, the dielectric constant (electric field value) generated from the water is not directly in contact with the water in the water bottle, and the thin film-like conductor formed of silver foil is read and detected on a circuit. The dielectric constant of air is generally 1 (F / m). The dielectric constant of water is 20-30 (F / m), which is 20-30 times that of air.

In the case of the conventional water level control sensor, it also responded to the minute dielectric constant (a slight increase in the dielectric constant due to contamination or foreign matter in the water bottle), so that the water did not rise to the proper level, but an error that was determined to be filled by other environments in the water bottle occurred. The present invention reads the detection value (capacity value-dielectric constant) into a silver foil (thin conductor) in the form of a wide rectangular plate and does not respond to the fine dielectric constant, and the thin-film conductor in the form of a rectangular plate detects the dielectric constant with a large area, that is, a high capacity. When the set level is checked, unlike the previous level control sensor, it is formed to accurately detect the actual water level. As a result, the medium of water is detected over a large area.

On the other hand, the integrating unit (S200) is the largest capacitance (CS) when the distribution level (Y-Capacitor) detected through the detection unit (S100) is inversely proportional to the value of the capacitance (CS), the water level is high When the value is read, the integral voltage C becomes the lowest value, and when the level is low, when the smallest capacitance CS value is read, the integrated voltage C is integrated so that the integrated voltage C becomes the highest value.

In addition, the display unit S300 has at least four voltage comparators formed at a rear end of the integrator S200, and thus has a minimum V _LOW according to an inverting input. If the integral voltage C is less than V _LOW , a plurality of comparison resistors R1 to R4 in the range of ~ V _HIGH are provided so that all of the LEDs L1 to L4 are turned on to display the highest level. If it is above V _HIGH , all of the LEDs L1 to L4 are turned off to indicate the lowest level.

For example, the display unit 300 is provided with a plurality of comparison resistors ranging from 1.25V to 2.5V, depending on the inverting input, and when the integrated voltage is 1.25V or less, all the LEDs are turned on to display the highest level. Above 2.5V, all of the LEDs are off to form the lowest level.

Accordingly, the LED is formed so that at least one or more lights up by the capacitance value detected according to the water level in the water bottle so that the differential flashes or lights up according to the water level.

At this time, the current amplifier OPAMP is formed between the integrating unit and the display unit so that the average voltage DC-induced by the integration is amplified and provided to the comparator of the display unit.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

S100 ... detection unit S200 ... integration unit
S300 ... Display
1 ... thin film conductors 2 ... insulating tape
3 ... crimp spring 4 ... support
100 ... water bottle 110 ... enclosure
120 ... engaging groove 130 ... fixing hole
140 ... Bracket 141 ... Fitting groove
142 ... dustproof pad 150 ... inlet
160 ... plug 170 ... circulation tube
180 ... pumping pipe 190 ... water level sensor
200 ... heating means 210 ... heating plate
211 ... sanding surface 212 ... insulating film
220 ... slider 221 ... bend
222 ... Storage 230 ... Guide plate
240 ... heater 250 ... packing
251 ... fitting groove 300 ... cover
310 ... union 320 ... grill

Claims (2)

The thin film type conductor 1 is attached to one side of the outer circumferential surface of the water bottle 100 mounted inside the hot water boiler 60 for hot water mat to sense the level of water contained in the water bottle in the form of a plate, and the thin film type conductor 1 is The area of the thin film in the form of a plate of the dielectric constant generated from the water in the water tank is sensed with a high capacity to read the detected capacitance value onto the circuit, and is in close contact with the outer circumferential surface of the thin film conductor 1 for insulation. Insulating tape (2) is formed, and the pressing spring (3) is formed to press the outside to prevent the separation of the thin-film conductor (1) and the insulating tape (2) to maintain a firm attachment state, the pressing Indirectly detectable water level detection sensor (S) consisting of a support (4) configured to support the spring and to be fixed to the outer wall of the water bottle is formed; The water level detection sensor (S) is provided with an oscillator (Oscillator) to detect the distribution capacity (Y-Capacitor) between the circuit and ground in accordance with the water level in the water tank, the vibration pulse generated in the oscillator is a reference capacitor (CR) ), The vibration pulse voltage via the reference capacitor (CR) generates an electrostatic capacitance (CS) indirectly with water in the water tank (100) through the thin film-shaped conductor (1), and the capacitance (CS) ) Is a detector (S100) for conducting with the heater 240 formed inside the water bottle to detect the distribution capacity (Y-Capacitor);
The distribution capacitor (Y-Capacitor) detected through the detection unit (S100) changes in inverse proportion to the value of the capacitance (CS), and when the value of the largest capacitance (CS) is read when the water level is high, the integral voltage (C) An integrating unit (S200) for integrating the averaged voltage, which is the lowest value and the DC voltage is increased so that the integral voltage (C) is the highest when the smallest capacitance (CS) value is read when the water level is low;
At least four voltage comparators are formed at the rear end of the integrator S200, and a plurality of comparison resistors R1 to R4 in a range of V _VLOW to V _HIGH according to an inverting input are provided to integrate the voltage C. If the V _LOW or less, all of the LEDs (L1 ~ L4) is turned on to display the highest level, and if the integral voltage (C) is more than V _HIGH, the display unit (S300) to turn off all of the LED (L1 ~ L4) to display the minimum level )end;
The water level display circuit of the hot water boiler for hot water mat interlocked with the indirect detection type water level detection sensor, characterized in that the configuration. The method of claim 1, wherein the detection unit (S100)
For the discharge of the reference capacitor (CR) and the capacitance (CS), the diodes (D1, D2) are further added to achieve continuous forward and reverse oscillation after initialization when switching the pulse waveform generated from the oscillator (+ waveform OR-waveform switching). The water level display circuit of the hot water boiler for hot water mat interlocked with the indirect detection type water level detection sensor, characterized in that the installation.

Images