WO2012144744A2 - Electric water heater having self-regulating heating element and manufacturing method for same - Google Patents
Electric water heater having self-regulating heating element and manufacturing method for same Download PDFInfo
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- WO2012144744A2 WO2012144744A2 PCT/KR2012/002126 KR2012002126W WO2012144744A2 WO 2012144744 A2 WO2012144744 A2 WO 2012144744A2 KR 2012002126 W KR2012002126 W KR 2012002126W WO 2012144744 A2 WO2012144744 A2 WO 2012144744A2
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- WIPO (PCT)
- Prior art keywords
- heating element
- temperature
- water heater
- electric water
- self
- Prior art date
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/78—Heating arrangements specially adapted for immersion heating
- H05B3/82—Fixedly-mounted immersion heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
- F24H1/202—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply with resistances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/223—Temperature of the water in the water storage tank
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/246—Water level
- F24H15/248—Water level of water storage tanks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/335—Control of pumps, e.g. on-off control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/355—Control of heat-generating means in heaters
- F24H15/37—Control of heat-generating means in heaters of electric heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
- F24H9/1827—Positive temperature coefficient [PTC] resistor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
Definitions
- the present invention relates to a water heater, in particular a precise temperature control is possible in a specific temperature range, and by applying a self-regulation (SR) heating element capable of self-control of power and temperature over time can maintain the temperature uniformly hot water tank It is possible to quickly heat the water inside and keep it at a high temperature, and since it maintains the minimum power supply after rising to a constant boiling point temperature, it is a temperature self-regulation type that can greatly reduce the power consumption.
- the present invention relates to a water heater to which a heating element is applied and a method of manufacturing the same.
- a water heater is a device that generates heat energy as an energy source and then uses hot water obtained by heating water using the generated heat energy.
- the water heater uses oil, gas, or electricity as an energy source for heating water. Doing.
- the advantages and disadvantages of the water heater according to these energy sources are that the oil-based water heater has a high maintenance cost and a lot of noise due to the recent surge in oil prices, and there is a problem of installing an oil tank separately. There is a problem that there is a big burden, and water heaters using gas are convenient because of the high gas supply rate for cooking in each home, but problems such as the possibility of gas leakage and explosion accident and clouding of indoor air due to gas combustion are pointed out. have.
- the biggest problem is that the heating element used for heating in the conventional water heater is not easy to precise temperature control, and maintains the same power supply even after rising to a constant boiling point temperature is excessive energy loss.
- the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to enable accurate temperature control in a specific temperature range, and to allow self-control of power and temperature according to time. Regulation) Since the temperature can be maintained uniformly by applying a heating element, it is possible to quickly heat the water in the hot water tank and maintain the temperature at a high temperature. It is to provide an electric water heater with a temperature self-regulating heating element that can significantly reduce.
- the hot water tank having a cold water inlet and hot water discharge port;
- the water is heated by the electric power installed and installed in the hot water tank to heat water, and a paste mixed with an electric resistance material component, an insulation binder component, and a temperature control material component is cured to generate heat by being supplied with power.
- the technical configuration is characterized by including a self-regulating heating element (SR) for performing a temperature self-regulation function to maintain a constant temperature in a predetermined region.
- SR self-regulating heating element
- the SR heating element is formed in the form of a plate, it may be characterized in that provided with a through hole to allow the flow of water in the middle.
- the hot water tank may be provided with a water temperature sensor for measuring the temperature of the water.
- the hot water tank may be characterized in that the water temperature sensor for measuring the water level of water is further installed.
- the fixing means for fixing the upper and lower portions respectively in the hot water tank, the upper and lower ends of the SR heating element in a sliding manner may be further installed.
- the SR heating element has a conduction path (conduction path) is formed on the surface, the power line of the controller is located in the conductive path may be characterized in that it generates heat by conducting power from the controller.
- the electric resistance material component of the SR heating element may be 50 to 75% by weight
- the insulating binder component is 5 to 16% by weight
- the temperature control material component may be characterized in that 10 to 40% by weight.
- the electric resistance material component of the SR heating element may be characterized in that the paste is formed in a powder mixture state containing nickel (Ni) and aluminum (Al).
- the nickel may be 50 to 60% by weight of the electrical resistance material component
- the aluminum may be characterized in that 40 to 50% by weight of the electrical resistance material component.
- the electrical resistance material component of the SR heating element may be characterized in that it further comprises a corrective ingredient (corrective ingredients) at least one selected from the group of molybdenum (Mo), boron (B), silicon (Si).
- a corrective ingredient at least one selected from the group of molybdenum (Mo), boron (B), silicon (Si).
- the molybdenum may be 0.05 to 0.2 at% of the paste
- the boron may be characterized in that 0.005 to 0.02 at% of the paste.
- the dispersion (dispersion) value between the particles constituting the electrical resistance material component of the SR heating element is 0.1 to 10 ⁇ m
- the temperature coefficient of resistance (TCR) of the SR heating element is a particle constituting the electrical resistance material component. It may be characterized by being controlled by the liver dispersion value.
- the insulating binder component of the SR heating element may be made of any one selected from the group consisting of polyester (polyester), epoxy (epoxy) resin, epoxy-phenol lacquer (epoxy phenol laquer) composition.
- the insulating binder component of the SR heating element is 10 to 16% by weight
- the insulating binder component of the SR heating element may be characterized in that it further comprises a silicon (Si) powder of the nanostructure of the stabilizing additive.
- the silicon may be characterized in that 0.3 to 0.7 at% of the paste.
- the modulator component of the SR heating element may be characterized in that the paste is formed in a lead-free-glass powder mixture state.
- the glass powder mixture may be characterized in that it comprises SiO2, BaO, B2O3, Al2O3.
- the dispersion (dispersion) value of the particles constituting the modulator component of the SR heating element may be characterized in that 0.05 to 2 ⁇ m.
- the modulator component of the SR heating element may further include a corrective ingredient in which one or more selected from the group ZnO, Al, TiO2, and Bi2O3BaTiO.
- the discreteness between particles constituting the calibration component may be 0.05 to 0.4 ⁇ m.
- the modulator component of the SR heating element is characterized in that it comprises a mixture of at least one selected from the group of niobium (Nb), antimony (Sb), yttrium (Y), lanthanum (La) as a donor (donor) can do.
- the resistance value of the SR heating element is 0.05 to 1.0 ⁇ / ⁇ , characterized in that the resistance value of the SR heating element is changed by adjusting the weight ratio of the electrical resistance material component, the insulating binder component, the control material component constituting the SR heating element.
- the resistance temperature coefficient of the SR heating element is 500 ⁇ 10 -6 to 50 ⁇ 10 -4 / °C, the SR heating element by adjusting the weight ratio of the electrical resistance material component, the insulating binder component, the control material component constituting the SR heating element.
- the resistance temperature coefficient of may be characterized in that it is changed.
- the manufacturing method of the electric water heater to which the temperature self-regulating heating element according to the present invention comprises the steps of preparing an SR heating element forming paste (paste) is mixed with the electrical resistance material component, the insulation binder component and the temperature control material component; Applying the SR heating element-forming paste to a surface of a heat resistant substrate at a predetermined thickness; Characterizing in the technical configuration comprising the step of curing the paste for forming the SR heating element.
- the SR heating element paste may be applied to the heat resistant substrate by a screen print method.
- the electrical resistance material component is added to the nickel, aluminum molybdenum (Mo), boron (B), silicon (Si), such as (corrective ingredients) by adding a planetary bowl mill (ball) for 4 to 12 hours without oxygen inflow It may be characterized in that the manufacturing in the closed space of the mill).
- Electric water heater using the temperature self-regulating heating element according to the present invention it is possible to precise temperature control in a specific temperature range, by applying a self-regulation (SR) heating element capable of self-control of power and temperature over time to uniform temperature It maintains a minimum power supply after a rapid rise to a constant boiling point temperature, so that the water in the hot water tank can be heated quickly and power consumption can be greatly reduced.
- SR self-regulation
- the present invention is the manufacturing cost is reduced by the application of the SR heating element, the maintenance work is simple, there is no malfunction or failure does not occur, have a high reliability and durability, and can prevent the occurrence of fire.
- the present invention is to change the resistance value and the resistance temperature coefficient of the SR heating element by adjusting the weight ratio of each component of the SR heating element is also an advantage that can be easily and easily manufactured SR heating element whose physical properties are adjusted in response to various temperature environment have.
- the SR heating element is formed in the form of a plate, but since the flow of water is free through a plurality of through-holes formed in the middle, the heat transfer efficiency per unit time is high, and the hot water production capacity is excellent.
- FIG. 1 is a front sectional view for explaining the configuration of the electric water heater according to the present invention.
- FIG 2 is an operation control circuit diagram of the electric water heater according to the present invention.
- Figure 3 is a front view for explaining the configuration of the SR heating element applied to the electric water heater according to the present invention.
- Figure 4 is an enlarged cross-sectional view showing the structure of the SR heating element applied to the electric water heater according to the present invention.
- FIG. 5 is a graph showing the temperature control performance according to the embodiment and the comparative example of the SR heating element applied to the electric water heater according to the present invention.
- Figure 6 is a graph showing the power test results of the SR heating element applied to the electric water heater according to the present invention.
- Figure 7 is a graph showing the impedance test results of the SR heating element applied to the electric water heater according to the present invention.
- Figure 8 is a graph showing the results of the temperature change experiment of the SR heating element applied to the electric water heater according to the present invention.
- the electric water heater according to the present invention has a configuration having an SR heating element which can greatly reduce the power consumption because it maintains a minimum power supply after rapidly rising to a high temperature and rising to a constant boiling point temperature.
- FIG. 1 is a front sectional view for explaining the configuration of the electric water heater according to the present invention
- Figure 2 is an operation control circuit diagram of the electric water heater according to the present invention
- Figure 3 is a configuration of the SR heating element applied to the electric water heater according to the present invention. It is a front view for demonstrating.
- the electric water heater 1 is provided with a hot water tank 2, the hot water tank 2 is connected to a water pipe or the like to introduce cold water into the hot water tank (2) (3) And a hot water outlet 5 introduced through the cold water inlet 3 and discharging the hot water 4 heated in the hot water tank 2 to a place where the hot water tank 2 is heated.
- the cover 6 is attached so that water does not overflow to the outside.
- the SR heating element 7 is formed in a plate shape, and has a through hole 7a allowing water flow in the middle thereof. Since the SR heating element 7 is in constant contact with water in the hot water tank 2, the surface of the SR heating element 7 is coated with an insulating waterproof layer.
- an insulation waterproof layer it is preferable to use resin with large insulation and water resistance, for example, an epoxy, a Teflon resin, etc.
- the SR heating element (7) is fixed in the hot water tank (2), the upper and lower ends of the rail-shaped fixing means (16) with sliding grooves are respectively supported by sliding.
- the fixing means 16 is made of an insulating material and installed in the upper and lower portions of the hot water tank 2 in accordance with the number of the SR heating elements 7.
- the motor pump 20 is installed to be connected to the cold water inlet 3 in the hot water tank (2).
- the power supply controller 22 supplies electric power from the power supply source 13 to the motor pump 20.
- the motor pump 20 is operated.
- water cold water
- the motor pump 20 is controlled to stop driving.
- two water level detection sensors 21 may be used for adjusting the water level
- the motor pump 20 may be driven only for a predetermined time using a timer.
- a water temperature sensor 23 is installed to detect the water temperature in the hot water tank 2, and when the water temperature detected by the water temperature sensor 23 reaches the designed lower limit, the power supply controller 22 is connected to the SR heating element 7. Electricity is supplied from the power supply source 13 to generate heat, and the water in the hot water tank 2 is quickly heated by this heat.
- the relay switch 24 drops to turn off the power supply.
- the relay switch 24 may be a separate mechanism or may be provided inside the power supply controller 22.
- AC power or solar electric power or battery power may be used as the power supply source 13.
- the electric water heater according to the present invention may be used for hot water or for shower or heating. .
- the SR heating element 7 is capable of precise temperature control in a specific temperature range, self-control of power and temperature over time, and after rising to a constant boiling point temperature. It maintains a minimum power supply and is configured to greatly reduce power consumption. Therefore, the water in the hot water tank 2 is rapidly heated to increase the temperature, but the power consumption can be minimized.
- Figure 4 is a cross-sectional view showing an enlarged structure of the SR heating element applied to the electric water heater according to the present invention
- Figure 5 is a graph showing the temperature control performance according to the embodiment and comparative example of the SR heating element applied to the electric water heater according to the present invention.
- 6 is a graph showing a power test result of the SR heating element applied to the electric water heater according to the present invention
- FIG. 7 is a graph showing an impedance test result of the SR heating element applied to the electric water heater according to the present invention
- FIG. Is a graph showing the results of a temperature change experiment of the SR heating element applied to the electric water heater.
- the SR heating element 7 is supplied with power from the power supply of the power supply controller 22 to generate heat.
- Such SR heating element 7 is to perform a temperature self-regulation function, so that the temperature is kept constant in the set temperature range while adjusting the heating state in response to the ambient temperature environment. That is, the SR heating element 7 keeps the predetermined temperature of the region around the SR heating element 7 continuously at a set temperature, so that the predetermined region temperature around the SR heating element 7 is lower than a temperature value set due to external influences or the like.
- the predetermined area temperature around the SR heating element 7 quickly reaches the set temperature.
- the predetermined area temperature around the SR heating element 7 increases, the predetermined area around the SR heating element 7 is turned off. Allow the temperature to lower.
- the heat generating state of the SR heating element 7 is adjusted according to the difference between the predetermined region temperature around the SR heating element 7 and the set temperature, and as the difference between the predetermined region temperature and the set temperature around the SR heating element 7 increases, the temperature is increased. It has the ability to generate heat and allow rapid temperature rise.
- the self-regulation function of the SR heating element 7 has a predetermined thickness produced by curing a paste in which an electric resistance material component, an insulation binder component, and a temperature control material component are mixed. It is implemented by a film or a coating film.
- the SR heating element 7 is formed in the form of a plate as mentioned above, and has a through hole 7a in the middle thereof to allow the flow of water. And it is stably supported by the fixing means 16 in the hot water tank (2).
- a conduction path 72 is formed on the surface of the SR heating element 7, and the power line 71 of the power supply device of the controller 22 is located in the conduction path 72.
- the SR heating element 7 receives power through the conductive path 72 to generate heat in the range of approximately 150 to 450 ° C.
- the SR heating element 7 is made by curing a paste in which an electric resistance material component, an insulating binder component, and a control material component are mixed.
- the SR heating element 7 may be formed by being applied to a heat resistant substrate by a screen print method.
- the SR heating element 7 may be heat-treated in a conveyor furnace that emits infrared rays for 8 to 12 minutes at 130 to 160 ° C., and then heat-treated at 180 ° C. for 20 minutes.
- the conductive path 72 is formed on the surface of the SR heating element 7 so that the power line 71 of the power supply device of the controller 22 is positioned in the conductive path 72 to conduct electricity to generate heat.
- SR heating element 7 is configured to have 50 to 75% by weight of the electrical resistance material component, 5 to 16% by weight of the insulating binder component, 10 to 40% by weight of the temperature control material component do.
- the content of the electrical resistance material component is less than 50% by weight is not preferable to realize the heat generating performance of the heating element, when it exceeds 75% by weight is not preferable because the stability of the temperature control is lowered.
- the content of the insulating binder component is less than 5% by weight, it is not preferable because the bonding strength of the composition is lowered.
- the content of the insulating binder component is more than 16% by weight, the component content of other compositions such as the resistance component is low, so that the exothermic performance is lowered. I can't.
- the content of the temperature control material component is less than 10% by weight, it is not desirable to be insufficient to realize the function of adjusting to a specific temperature, and when the content of the temperature control material exceeds 40% by weight, the content of other components such as the resistance component is too small. Not preferred.
- the SR heating element 7 forms a paste in a powder mixture state in which the electrical resistance material component includes nickel (Ni) and aluminum (Al).
- the electrical resistivity component is composed of nickel 50 to 60% by weight of the electrical resistance material component, aluminum 40 to 50% by weight of the electrical resistive material component, nickel 53% by weight of the electrical resistive material component, aluminum It is preferably configured to have 47% by weight of this electrical resistive substance component.
- the electrical resistance material component of the SR heating element 7 may include molybdenum (Mo), boron (B), silicon (Si), and the like as corrective ingredients.
- Mo molybdenum
- B boron
- Si silicon
- the molybdenum is 0.05 to 0.2 at% of the paste
- the boron is to be composed of 0.005 to 0.02 at% of the paste
- the molybdenum is preferably composed of 0.1 at% of the paste
- the boron is composed of 0.01 at% of the paste.
- the electrical resistive substance is added to nickel and aluminum by adding corrective ingredients such as molybdenum (Mo), boron (B), and silicon (Si) for 4 to 12 hours (preferably 6- 10 hours) in a closed space of a planetary ball mill.
- Mo molybdenum
- B boron
- Si silicon
- the dispersion value between particles constituting the electrical resistance material component of the SR heating element 7 is formed in the range of 0.1 to 10 ⁇ m, more preferably, the dispersion value between particles in the range of 0.5 to 5 ⁇ m.
- the specific surface area is preferably 200 m 2 / g or less.
- the dispersion value between the particles constituting the electrical resistance material component is linked to the temperature coefficient of resistance (TCR) of the SR heating element 7, and the resistance temperature coefficient of the SR heating element 7 is the electrical resistance material component. It is controlled by the dispersion value between particles.
- the dispersion value between the particles constituting the electrical resistance material component is controlled by the time the electrical resistance material component stays in the closed space of the planetary ball mill.
- the insulating binder component of the SR heating element 7 is selected from a polyester, an epoxy resin, an epoxy-phenol lacquer composition, and the like.
- the insulating binder component is composed of 10 to 16% by weight of the paste
- nanostructured silicon (Si) powder which is a stabilizing additive, may be added to the insulating binder component.
- Si may be composed of 0.3 to 0.7 at% of the paste, preferably 0.4 to 0.6 at%.
- Such silicon shortens the structure formation time of the SR heating element 7 when manufacturing the SR heating element 7, and allows the resistance temperature coefficient of the SR heating element 7 which is set and implemented to be maintained for a long time.
- the SR heating element (7) serves to adjust to about 150 ⁇ 450 °C in the energized state through the temperature control material component.
- a specific material must be included as an appropriate temperature control material component to prevent overheating of the heating element and to contribute to the proper power consumption.
- the temperature control material of the SR heating element 7 forms a paste in the form of a lead-free-glass powder mixture.
- the glass powder mixture is obtained from the group consisting of SiO2, BaO, B2O3, and Al2O3. It is preferred that it is at least one oxide selected.
- the temperature control material component of the SR heating element 7 may be manufactured in a closed space of a planetary ball mill for 4-12 hours (preferably 6-10 hours) without oxygen inflow.
- the temperature control material component of the SR heating element 7 is such that the dispersion (dispersion) value between particles is formed in the range of 0.05 to 2 ⁇ m, preferably to form the dispersion value between particles in the range of 0.1 to 1.0 ⁇ m .
- the dispersion value between particles constituting the thermostat component is controlled by the time that the thermostat component stays in the closed space of the planetary ball mill.
- the temperature control material component of the SR heating element 7 may add a corrective ingredient including ZnO, Al, TiO2, Bi2O3BaTiO, etc., the discrete particles between the particles forming the correction component of such a temperature control material component (discretisation) can be formed in the range of 0.05 to 0.4 ⁇ m, preferably to be formed in the range of 0.1 to 0.3 ⁇ m.
- the temperature control material component of the SR heating element 7 has a mixture including niobium (Nb), antimony (Sb), yttrium (Y), lanthanum (La), and the like as a donor. Such donors are added to obtain high volume conductivity.
- SR heating element 7 according to an embodiment of the present invention configured as described above has a resistance value of 0.05 to 1.9 ⁇ / ⁇ (preferably 0.09 to 0.9 ⁇ / ⁇ ), SR according to an embodiment of the present invention
- the heating element 7 changes the resistance value of the SR heating element 7 by adjusting the weight ratio of the electrical resistance material component, the insulation binder component, and the temperature control material component.
- the SR heating element 7 according to the embodiment of the present invention configured as described above is a resistance thermometer of 500 to 50 ⁇ 10 -4 / °C (preferably 560 ⁇ 10 -6 to 40 ⁇ 10 -4 / °C) It has a number (TCR), the SR heating element 7 according to the embodiment of the present invention changes the resistance temperature coefficient of the SR heating element 7 by adjusting the weight ratio of the electrical resistance material component, the insulation binder component, the temperature control material component Let's go.
- Figure 5 is a graph showing the temperature control performance according to Example 1 and Comparative Example 1, the line segment 1 shows a temperature increase curve according to Comparative Example 1, the line segment 2 of the SR heating element 7 according to the present invention As the temperature is increased, the SR heating element 7 (Example 1) of the present invention can be seen that the resistance increases rapidly when the temperature is above a certain value.
- Example 1 the resistance value (impedance) increases with time, and thus the power usage decreases.
- Comparative Example 1 the impedance is almost constant and the power consumption is almost constant. Therefore, the SR heating element 7 of the present invention can increase the resistance value with time to reduce the power consumption, and the power and temperature self-regulation with time due to the increase in the resistance value (material characteristics). You can see that this is possible.
- the electric water heater of the present invention allows the SR heating element 7 to maintain a constant temperature while controlling the heat generation state in response to the surrounding temperature environment, the water in the hot water tank 2 is quickly heated to a temperature. It can increase the temperature and maintain the elevated temperature with low power consumption.
Abstract
The present invention relates to an electric water heater having a self-regulating surface heating element, wherein the temperature can be accurately controlled within a particular temperature range; the water in the hot water tank can be heated rapidly and the high water temperature can be maintained as the self-regulation heating element (SR heating element), which can temporally self-regulate power and temperature, and maintain a uniform temperature; and the power usage can be significantly reduced as the water temperature can be sustained with only a minimum of power supply when the water has heated beyond a set boiling point. The electric water heater comprises: a hot water tank provided with a cold water inlet and a hot water outlet; and an SR heating element, which is disposed in the hot water tank, is formed from a hardened paste mixture of an electrical resistance material, an insulation binder and a temperature control material, generates heat with supplied power, and is self-regulates the temperature so that the temperature is uniformly maintained within a defined range.
Description
본 발명은 온수기에 관한 것으로, 특히 특정한 온도 영역에서 정확한 온도조절이 가능하고, 시간에 따른 전력 및 온도의 자기제어가 가능한 SR(Self-Regulation) 발열체를 적용하여 온도를 균일하게 유지할 수 있으므로 온수탱크 내의 물을 신속하게 가열하고 고온의 온도로 유지하는 것이 가능하며, 일정한 비등점 온도까지 상승한 이후에는 최소한의 전력 공급을 유지하기 때문에 전력소비량을 대폭 절감할 수 있는 온도 자가조절형(SR: Self-Regulation) 발열체를 적용한 온수기 및 그 제조방법에 관한 것이다.The present invention relates to a water heater, in particular a precise temperature control is possible in a specific temperature range, and by applying a self-regulation (SR) heating element capable of self-control of power and temperature over time can maintain the temperature uniformly hot water tank It is possible to quickly heat the water inside and keep it at a high temperature, and since it maintains the minimum power supply after rising to a constant boiling point temperature, it is a temperature self-regulation type that can greatly reduce the power consumption. The present invention relates to a water heater to which a heating element is applied and a method of manufacturing the same.
일반적으로, 온수기는 에너지원으로 열에너지를 발생시킨 다음, 발생한 열에너지를 사용하여 물을 가열함으로써 얻게 되는 온수를 사용하게 되는 장치로서, 이러한 온수기는 용수를 가열시키는 에너지원으로서 기름이나 가스 또는 전기를 사용하고 있다.In general, a water heater is a device that generates heat energy as an energy source and then uses hot water obtained by heating water using the generated heat energy. The water heater uses oil, gas, or electricity as an energy source for heating water. Doing.
이들 에너지원에 따른 온수기의 장단점으로는 기름을 사용하는 온수기의 경우 최근 기름값의 급등으로 유지비가 많이 들고 소음이 많으며, 별도로 기름탱크를 설치해야 하는 문제가 있고, 또 가격이 비싸 초기 설치 비용에 대한 부담이 크다는 문제가 있으며, 가스를 사용하는 온수기는 이미 각 가정에 취사용의 가스 보급률이 높아 편리성이 있으나, 가스 누설 및 폭발 사고의 가능성 및 가스 연소에 따른 실내 공기 혼탁 등의 문제점이 지적되고 있다.The advantages and disadvantages of the water heater according to these energy sources are that the oil-based water heater has a high maintenance cost and a lot of noise due to the recent surge in oil prices, and there is a problem of installing an oil tank separately. There is a problem that there is a big burden, and water heaters using gas are convenient because of the high gas supply rate for cooking in each home, but problems such as the possibility of gas leakage and explosion accident and clouding of indoor air due to gas combustion are pointed out. have.
한편, 전기 온수기의 경우 소음이 없고 안전성도 우수하나 용수를 가열하기 위한 발열체를 온수 탱크 내에 설치하여야 하는데, 종래의 단순 코일식의 경우 물과의 접촉 면적을 크게 하기 어렵고, 파이프나 판재에 박판의 발열재를 도포한 발열체의 경우 발열체 간의 물이 흐름이 차단되며 강체의 특정상 장치 크기에 맞추어 발열량 조절을 위한 발열체의 변경 작업이 어렵다는 문제가 있었다.On the other hand, electric water heaters have no noise and excellent safety, but a heating element for heating water should be installed in the hot water tank. In the case of the conventional simple coil type, it is difficult to increase the contact area with water, In the case of a heating element coated with a heating material, water flow between the heating elements was blocked, and there was a problem in that it was difficult to change the heating element for adjusting the heating amount according to the specific size of the rigid body.
가장 큰 문제점은, 종래의 온수기에서 가열을 위해 사용되던 발열체의 경우 정확한 온도조절이 용이하지 않고, 일정한 비등점 온도까지 상승한 이후에도 지속적으로 동일한 전력공급을 유지하고 있어서 에너지 손실이 과다하다는 점이었다. The biggest problem is that the heating element used for heating in the conventional water heater is not easy to precise temperature control, and maintains the same power supply even after rising to a constant boiling point temperature is excessive energy loss.
이에 본 발명은 상기와 같은 종래의 제반 문제점을 해소하기 위해 제안된 것으로, 본 발명의 목적은 특정한 온도 영역에서 정확한 온도조절이 가능하고, 시간에 따른 전력 및 온도의 자기제어가 가능한 SR(Self-Regulation) 발열체를 적용하여 온도를 균일하게 유지할 수 있으므로 온수탱크 내의 물을 신속하게 가열하고 고온의 온도로 유지하는 것이 가능하며, 일정한 비등점 온도까지 상승한 이후에는 최소한의 전력 공급을 유지하기 때문에 전력소비량을 대폭 절감할 수 있는 온도 자가조절형 발열체를 적용한 전기 온수기를 제공하는 데 있다.Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to enable accurate temperature control in a specific temperature range, and to allow self-control of power and temperature according to time. Regulation) Since the temperature can be maintained uniformly by applying a heating element, it is possible to quickly heat the water in the hot water tank and maintain the temperature at a high temperature. It is to provide an electric water heater with a temperature self-regulating heating element that can significantly reduce.
상기와 같은 목적을 달성하기 위하여 본 발명의 기술적 사상에 의한 전기 온수기는, 냉수유입구와 온수배출구를 구비하는 온수탱크와; 상기 온수탱크 내에 내장되도록 설치되고 공급되는 전력에 의해 발열되어 물을 가열하되, 전기저항물질 성분과 절연바인더 성분 및 온도조절물질 성분이 혼합된 페이스트(paste)가 경화되어 이루어져 전원을 공급받아 발열하고, 온도 자가조절 기능을 수행하여 정해진 영역의 온도가 일정하게 유지되도록 하는 SR 발열체(self regulation heating element)를 포함하여 구성되는 것을 그 기술적 구성상의 특징으로 한다. Electric water heater according to the technical idea of the present invention to achieve the above object, the hot water tank having a cold water inlet and hot water discharge port; The water is heated by the electric power installed and installed in the hot water tank to heat water, and a paste mixed with an electric resistance material component, an insulation binder component, and a temperature control material component is cured to generate heat by being supplied with power. In addition, the technical configuration is characterized by including a self-regulating heating element (SR) for performing a temperature self-regulation function to maintain a constant temperature in a predetermined region.
여기서, 상기 SR 발열체는 판형의 형태로 형성되되, 중간 중간에 물의 흐름을 허용하는 통공을 구비한 것을 특징으로 할 수 있다. Here, the SR heating element is formed in the form of a plate, it may be characterized in that provided with a through hole to allow the flow of water in the middle.
또한, 상기 온수탱크 내에는 물의 온도를 측정하는 수온센서가 구비되는 것을 특징으로 할 수 있다. In addition, the hot water tank may be provided with a water temperature sensor for measuring the temperature of the water.
또한, 상기 온수탱크 내에는 물의 수위를 측정하는 수온감지센서가 더 설치되는 것을 특징으로 할 수 있다. In addition, the hot water tank may be characterized in that the water temperature sensor for measuring the water level of water is further installed.
또한, 상기 온수탱크 내의 상부와 하부에 각각 고정되고, 상기 SR 발열체의 상단과 하단을 슬라이딩 방식으로 끼워 지지하는 고정수단이 더 설치되는 것을 특징으로 할 수 있다. In addition, the fixing means for fixing the upper and lower portions respectively in the hot water tank, the upper and lower ends of the SR heating element in a sliding manner may be further installed.
또한, 상기 SR 발열체는 표면에 전도로(conduction path)가 형성되며, 상기 전도로에는 제어기의 전원선이 위치되어 제어기로부터 전원을 전도받아 발열하게 되는 것을 특징으로 할 수 있다.In addition, the SR heating element has a conduction path (conduction path) is formed on the surface, the power line of the controller is located in the conductive path may be characterized in that it generates heat by conducting power from the controller.
또한, 상기 SR 발열체의 전기저항물질 성분은 50 내지 75 중량%이고, 절연바인더 성분이 5 내지 16 중량%이며, 온도조절물질 성분이 10 내지 40 중량%인 것을 특징으로 할 수 있다.In addition, the electric resistance material component of the SR heating element may be 50 to 75% by weight, the insulating binder component is 5 to 16% by weight, the temperature control material component may be characterized in that 10 to 40% by weight.
또한, 상기 SR 발열체의 전기저항물질 성분은 니켈(Ni)과 알루미늄(Al)을 포함하는 분말 혼합물 상태로 상기 페이스트를 이루게 되는 것을 특징으로 할 수 있다.In addition, the electric resistance material component of the SR heating element may be characterized in that the paste is formed in a powder mixture state containing nickel (Ni) and aluminum (Al).
또한, 상기 니켈은 상기 전기저항물질 성분의 50 내지 60 중량%이고, 상기 알루미늄은 상기 전기저항물질 성분의 40 내지 50 중량%인 것을 특징으로 할 수 있다.In addition, the nickel may be 50 to 60% by weight of the electrical resistance material component, the aluminum may be characterized in that 40 to 50% by weight of the electrical resistance material component.
또한, 상기 SR 발열체의 전기저항물질 성분은 몰리브덴(Mo), 보론(B), 규소(Si) 군 중에서 하나 이상이 선택되는 교정 성분(corrective ingredients)을 더 포함하는 것을 특징으로 할 수 있다.In addition, the electrical resistance material component of the SR heating element may be characterized in that it further comprises a corrective ingredient (corrective ingredients) at least one selected from the group of molybdenum (Mo), boron (B), silicon (Si).
또한, 상기 몰리브덴은 상기 페이스트의 0.05 내지 0.2at%이고, 상기 보론은 상기 페이스트의 0.005 내지 0.02at%인 것을 특징으로 할 수 있다.In addition, the molybdenum may be 0.05 to 0.2 at% of the paste, the boron may be characterized in that 0.005 to 0.02 at% of the paste.
또한, 상기 SR 발열체의 전기저항물질 성분을 이루는 입자 간 분산(dispersion)값은 0.1 내지 10㎛이고, 상기 SR 발열체의 저항온도계수(TCR:temperature coefficient of resistance)는 상기 전기저항물질 성분을 이루는 입자 간 분산값에 의해 조절되는 것을 특징으로 할 수 있다.In addition, the dispersion (dispersion) value between the particles constituting the electrical resistance material component of the SR heating element is 0.1 to 10㎛, the temperature coefficient of resistance (TCR) of the SR heating element is a particle constituting the electrical resistance material component. It may be characterized by being controlled by the liver dispersion value.
또한, 상기 SR 발열체의 절연바인더 성분은 폴리에스테르(polyester), 에폭시(epoxy)수지, 에폭시-페놀 라커(epoxy phenol laquer) 조성물 군 중에서 선택된 어느 하나로 이루어지는 것을 특징으로 할 수 있다.In addition, the insulating binder component of the SR heating element may be made of any one selected from the group consisting of polyester (polyester), epoxy (epoxy) resin, epoxy-phenol lacquer (epoxy phenol laquer) composition.
또한, 상기 SR 발열체의 절연바인더 성분은 10 내지 16 중량%이되, 상기 SR 발열체의 절연바인더 성분은 안정화 첨가물인 나노구조의 규소(Si) 분말을 더 포함하는 것을 특징으로 할 수 있다.In addition, the insulating binder component of the SR heating element is 10 to 16% by weight, the insulating binder component of the SR heating element may be characterized in that it further comprises a silicon (Si) powder of the nanostructure of the stabilizing additive.
또한, 상기 규소는 상기 페이스트의 0.3 내지 0.7at%인 것을 특징으로 할 수 있다.In addition, the silicon may be characterized in that 0.3 to 0.7 at% of the paste.
또한, 상기 SR 발열체의 조절물질 성분은 납성분이 없는 유리(lead-free-glass) 분말 혼합물 상태로 상기 페이스트를 이루게 되는 것을 특징으로 할 수 있In addition, the modulator component of the SR heating element may be characterized in that the paste is formed in a lead-free-glass powder mixture state.
다.All.
또한, 상기 유리 분말 혼합물은 SiO₂, BaO, B₂O₃, Al₂O₃을 포함하는 것을 특징으로 할 수 있다.In addition, the glass powder mixture may be characterized in that it comprises SiO₂, BaO, B₂O₃, Al₂O₃.
또한, 상기 SR 발열체의 조절물질 성분을 이루는 입자 간 분산(dispersion)값은 0.05 내지 2㎛인 것을 특징으로 할 수 있다.In addition, the dispersion (dispersion) value of the particles constituting the modulator component of the SR heating element may be characterized in that 0.05 to 2㎛.
또한, 상기 SR 발열체의 조절물질 성분은 ZnO, Al, TiO₂, Bi₂O₃BaTiO 군 중에서 하나 이상이 선택되는 교정 성분(corrective ingredients)을 더 포함하는 것을 특징으로 할 수 있다.In addition, the modulator component of the SR heating element may further include a corrective ingredient in which one or more selected from the group ZnO, Al, TiO₂, and Bi₂O₃BaTiO.
또한, 상기 교정 성분을 이루는 입자 간 이산(discretisation)은 0.05 내지 0.4㎛인 것을 특징으로 할 수 있다.In addition, the discreteness between particles constituting the calibration component may be 0.05 to 0.4 μm.
또한, 상기 SR 발열체의 조절물질 성분은 나이오븀(Nb), 안티몬(Sb), 이트륨(Y), 란탄(La) 군에서 하나 이상이 선택되는 혼합물을 공여체(donor)로 포함하게 되는 것을 특징으로 할 수 있다.In addition, the modulator component of the SR heating element is characterized in that it comprises a mixture of at least one selected from the group of niobium (Nb), antimony (Sb), yttrium (Y), lanthanum (La) as a donor (donor) can do.
또한, 상기 SR 발열체의 저항값은 0.05 내지 1.0 Ω/□이되, 상기 SR 발열체를 이루는 전기저항물질 성분, 절연바인더 성분, 조절물질 성분의 중량비 조절에 의해 상기 SR 발열체의 저항값이 변경되는 것을 특징으로 할 수 있다.In addition, the resistance value of the SR heating element is 0.05 to 1.0 Ω / □, characterized in that the resistance value of the SR heating element is changed by adjusting the weight ratio of the electrical resistance material component, the insulating binder component, the control material component constituting the SR heating element. You can do
또한, 상기 SR 발열체의 저항온도계수는 500×10-6 내지 50×10-4/℃이되, 상기 SR 발열체를 이루는 전기저항물질 성분, 절연바인더 성분, 조절물질 성분의 중량비 조절에 의해 상기 SR 발열체의 저항온도계수가 변경되는 것을 특징으로 할 수 있다.In addition, the resistance temperature coefficient of the SR heating element is 500 × 10 -6 to 50 × 10 -4 / ℃, the SR heating element by adjusting the weight ratio of the electrical resistance material component, the insulating binder component, the control material component constituting the SR heating element. The resistance temperature coefficient of may be characterized in that it is changed.
한편, 본 발명에 의한 온도 자가조절형 발열체를 적용한 전기 온수기의 제조방법은, 전기저항물질 성분과 절연바인더 성분 및 온도조절물질 성분이 혼합된 SR 발열체 형성용 페이스트(paste)를 준비하는 단계와; 내열성 기판의 표면에 상기 SR 발열체 형성용 페이스트를 일정 두께로 도포하는 단계와; 상기 SR 발열체 형성용 페이스트를 경화시키는 단계를 포함하는 것을 그 기술적 구성상의 특징으로 한다. On the other hand, the manufacturing method of the electric water heater to which the temperature self-regulating heating element according to the present invention comprises the steps of preparing an SR heating element forming paste (paste) is mixed with the electrical resistance material component, the insulation binder component and the temperature control material component; Applying the SR heating element-forming paste to a surface of a heat resistant substrate at a predetermined thickness; Characterizing in the technical configuration comprising the step of curing the paste for forming the SR heating element.
여기서, 상기 SR 발열체 페이스트는 스크린 프린트(screen print) 방식으로 내열성 기판에 도포되는 것을 특징으로 할 수 있다. Here, the SR heating element paste may be applied to the heat resistant substrate by a screen print method.
또한, 상기 전기저항물질 성분은 니켈, 알루미늄에 몰리브덴(Mo), 보론(B), 규소(Si) 등의 교정 성분(corrective ingredients)을 첨가하여 산소 유입없이 4~12시간 동안 유성형 보올 밀(ball mill)의 폐쇄공간에서 제조되는 것을 특징으로 할 수 있다. In addition, the electrical resistance material component is added to the nickel, aluminum molybdenum (Mo), boron (B), silicon (Si), such as (corrective ingredients) by adding a planetary bowl mill (ball) for 4 to 12 hours without oxygen inflow It may be characterized in that the manufacturing in the closed space of the mill).
본 발명에 의한 온도 자가조절형 발열체를 적용한 전기 온수기는, 특정한 온도 영역에서 정확한 온도조절이 가능하고, 시간에 따른 전력 및 온도의 자기제어가 가능한 SR(Self-Regulation) 발열체를 적용하여 온도를 균일하게 유지할 수 있으며 일정한 비등점 온도까지 급격하게 상승한 이후에는 최소한의 전력 공급을 유지하기 때문에 온수탱크 내의 물을 신속하게 가열할 수 있는 것은 물론 전력소비량을 대폭 절감할 수 있다. Electric water heater using the temperature self-regulating heating element according to the present invention, it is possible to precise temperature control in a specific temperature range, by applying a self-regulation (SR) heating element capable of self-control of power and temperature over time to uniform temperature It maintains a minimum power supply after a rapid rise to a constant boiling point temperature, so that the water in the hot water tank can be heated quickly and power consumption can be greatly reduced.
또한, 본 발명은 SR 발열체의 적용으로 제조비용이 절감되고, 유지보수작업이 간편하며, 오동작이나 고장이 발생되지 않아 높은 신뢰성과 내구성을 가지게 되며, 화재의 발생을 방지될 수 있다.In addition, the present invention is the manufacturing cost is reduced by the application of the SR heating element, the maintenance work is simple, there is no malfunction or failure does not occur, have a high reliability and durability, and can prevent the occurrence of fire.
또한, 본 발명은 SR 발열체의 페이스트 각 성분의 중량비 조절에 의해 SR 발열체의 저항값과 저항온도계수가 변경되도록 함으로써 다양한 온도환경에 대응하여 물성이 조정된 SR 발열체를 간편하고 용이하게 제조할 수 있는 이점도 있다. In addition, the present invention is to change the resistance value and the resistance temperature coefficient of the SR heating element by adjusting the weight ratio of each component of the SR heating element is also an advantage that can be easily and easily manufactured SR heating element whose physical properties are adjusted in response to various temperature environment have.
또한, 본 발명은 SR 발열체가 판형의 형태로 형성되었지만 중간 중간에 형성된 다수의 통공을 통해 물의 유동이 자유롭기 때문에 단위 시간당의 열전달 효율이 높아 온수 생산 능력이 뛰어나다.In addition, in the present invention, the SR heating element is formed in the form of a plate, but since the flow of water is free through a plurality of through-holes formed in the middle, the heat transfer efficiency per unit time is high, and the hot water production capacity is excellent.
도 1은 본 발명에 의한 전기 온수기의 구성을 설명하기 위한 정단면도.1 is a front sectional view for explaining the configuration of the electric water heater according to the present invention.
도 2는 본 발명에 의한 전기 온수기의 작동 제어 회로도.2 is an operation control circuit diagram of the electric water heater according to the present invention.
도 3은 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 구성을 설명하기 위한 정면도.Figure 3 is a front view for explaining the configuration of the SR heating element applied to the electric water heater according to the present invention.
도 4는 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 구조를 확대하여 나타낸 단면도.Figure 4 is an enlarged cross-sectional view showing the structure of the SR heating element applied to the electric water heater according to the present invention.
도 5는 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 실시예와 비교예에 따른 온도 조절 성능을 나타낸 그래프.5 is a graph showing the temperature control performance according to the embodiment and the comparative example of the SR heating element applied to the electric water heater according to the present invention.
도 6은 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 전력실험 결과를 나타낸 그래프.Figure 6 is a graph showing the power test results of the SR heating element applied to the electric water heater according to the present invention.
도 7은 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 임피던스 실험 결과를 나타낸 그래프.Figure 7 is a graph showing the impedance test results of the SR heating element applied to the electric water heater according to the present invention.
도 8은 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 온도변화 실험 결과를 나타낸 그래프. Figure 8 is a graph showing the results of the temperature change experiment of the SR heating element applied to the electric water heater according to the present invention.
이하, 상기와 같은 본 발명의 기술적 사상에 따른 실시예를 첨부된 도면을 참조하여 구체적으로 설명하면 다음과 같다.Hereinafter, embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.
본 발명에 의한 전기 온수기는 신속하게 고온의 온도로 상승하고 일정한 비등점 온도까지 상승한 이후에는 최소한의 전력 공급을 유지하기 때문에 전력소비량을 대폭 절감할 수 있는 SR 발열체를 구비한 구성을 갖는다. The electric water heater according to the present invention has a configuration having an SR heating element which can greatly reduce the power consumption because it maintains a minimum power supply after rapidly rising to a high temperature and rising to a constant boiling point temperature.
도 1은 본 발명에 의한 전기 온수기의 구성을 설명하기 위한 정단면도이고, 도 2는 본 발명에 의한 전기 온수기의 작동 제어 회로도이며, 도 3은 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 구성을 설명하기 위한 정면도이다. 1 is a front sectional view for explaining the configuration of the electric water heater according to the present invention, Figure 2 is an operation control circuit diagram of the electric water heater according to the present invention, Figure 3 is a configuration of the SR heating element applied to the electric water heater according to the present invention. It is a front view for demonstrating.
도시된 바와 같이, 본 발명에 의한 전기 온수기(1)는 온수탱크(2)를 구비하며, 그 온수탱크(2)는 수도관 등에 접속되어 온수탱크(2)내로 냉수를 도입하게 되는 냉수유입구(3)와 그리고 상기 냉수유입구(3)를 통해 도입되어 온수탱크(2) 내에서 가열된 온수(4)를 사용처로 배출하는 온수배출구(5)를 구비하고 있으며, 상기한 온수탱크(2)는 뜨거운 물이 외부로 넘쳐 흐르지 않도록 덮개(6)가 장착되어 있다.As shown, the electric water heater 1 according to the present invention is provided with a hot water tank 2, the hot water tank 2 is connected to a water pipe or the like to introduce cold water into the hot water tank (2) (3) And a hot water outlet 5 introduced through the cold water inlet 3 and discharging the hot water 4 heated in the hot water tank 2 to a place where the hot water tank 2 is heated. The cover 6 is attached so that water does not overflow to the outside.
상기 온수탱크(2) 내에는 SR 발열체(7)가 판형의 형성되되, 그 중간 중간에 물의 흐름을 허용하는 통공(7a)을 구비한 형태로 구성된다. 상기 SR 발열체(7)는 온수탱크(2) 내에서 물과 상시 접하기 때문에 그 표면에 절연 방수층을 코팅 처리해준다. 절연 방수층으로는 절연성과 방수성이 큰 수지, 예를 들면 에폭시나 테프론 수지 등을 사용하는 것이 바람직하다. In the hot water tank 2, the SR heating element 7 is formed in a plate shape, and has a through hole 7a allowing water flow in the middle thereof. Since the SR heating element 7 is in constant contact with water in the hot water tank 2, the surface of the SR heating element 7 is coated with an insulating waterproof layer. As an insulation waterproof layer, it is preferable to use resin with large insulation and water resistance, for example, an epoxy, a Teflon resin, etc.
또한, 상기 SR 발열체(7)는 온수탱크(2) 내에 고정되는데, 슬라이딩 홈을 구비한 레일 형태의 고정수단(16)에 의해 상단과 하단이 각각 슬라이딩 방식으로 끼워져 지지된다. 상기 고정수단(16)은 절연재로 제작되고 상기 SR 발열체(7)의 개수에 맞춰서 상기 온수탱크(2) 내의 상부와 하부에 각각 설치된다. In addition, the SR heating element (7) is fixed in the hot water tank (2), the upper and lower ends of the rail-shaped fixing means (16) with sliding grooves are respectively supported by sliding. The fixing means 16 is made of an insulating material and installed in the upper and lower portions of the hot water tank 2 in accordance with the number of the SR heating elements 7.
한편, 모터펌프(20)가 상기 온수탱크(2) 내에서 냉수유입구(3)에 접속되도록 설치된다. 이같은 구성에 의하면 상기 온수탱크(2) 내의 수위감지센서(21)가 일정 수위 이하로 내려가는 것을 감지하여 신호를 출력하면 전원공급 제어기(22)가 모터펌프(20)에 전원 공급원(13)으로부터 전기를 공급하여 모터펌프(20)가 작동된다. 이로써 상수원으로부터 물(냉수)이 수도관에 접속된 냉수유입구(3)를 통해 온수탱크(2)내로 도입되며, 일정 수위에 도달하면 모터펌프(20)의 구동을 중지시키도록 제어하게 된다. 수위 조절을 위해 상하 2개의 수위 감지센서(21)를 사용할 수 있으나, 타이머를 사용하여 모터펌프(20)를 일정 시간 동안만 구동시키는 것도 가능하다. On the other hand, the motor pump 20 is installed to be connected to the cold water inlet 3 in the hot water tank (2). According to this configuration, when the water level sensor 21 in the hot water tank 2 detects that the water level falls below a predetermined level and outputs a signal, the power supply controller 22 supplies electric power from the power supply source 13 to the motor pump 20. By supplying the motor pump 20 is operated. As a result, water (cold water) is introduced into the hot water tank (2) through the cold water inlet (3) connected to the water pipe from the water supply source, and when the water level is reached, the motor pump 20 is controlled to stop driving. Although two water level detection sensors 21 may be used for adjusting the water level, the motor pump 20 may be driven only for a predetermined time using a timer.
또한 상기 온수탱크(2) 내의 수온을 감지하기 위하여 수온센서(23)가 설치되며, 수온센서(23)에 감지된 수온이 설계된 하한치에 도달하면 전원공급 제어기(22)는 SR 발열체(7)에 전원 공급원(13)으로부터 전기를 공급하여 발열시키게 되며, 이 발열에 의해 온수탱크(2)내의 물은 신속하게 가열된다. In addition, a water temperature sensor 23 is installed to detect the water temperature in the hot water tank 2, and when the water temperature detected by the water temperature sensor 23 reaches the designed lower limit, the power supply controller 22 is connected to the SR heating element 7. Electricity is supplied from the power supply source 13 to generate heat, and the water in the hot water tank 2 is quickly heated by this heat.
이와 같이 하여 설계된 상한치, 예를 들어 그 상한치가 95℃ 또는 100℃라면 그 온도에 도달한 것으로 수온센서(23)에서 신호가 출력이 되면, 릴레이 스위치(24)가 떨어져 전원을 오프시킨다. 여기서, 상기 릴레이 스위치(24)는 별도의 기구일 수도 있고, 아니면 전원공급 제어기(22)의 내부에 구비될 수도 있다.If the upper limit value designed in this way, for example, the upper limit value is 95 ° C. or 100 ° C., reaches the temperature and a signal is output from the water temperature sensor 23, the relay switch 24 drops to turn off the power supply. Here, the relay switch 24 may be a separate mechanism or may be provided inside the power supply controller 22.
상기한 전원 공급원(13)으로는 교류 전원이나 태양열에 의한 전기를 사용하거나 또는 배터리 전원을 이용할 수 있으며, 온수를 사용하는 것이나 샤워용이나 난방용 어느 것에나 본 발명에 의한 전기 온수기의 사용이 가능하다. As the power supply source 13, AC power or solar electric power or battery power may be used. The electric water heater according to the present invention may be used for hot water or for shower or heating. .
계속해서, 상기 SR 발열체(7)의 구성에 대해 더욱 상세히 설명하기로 한다. 상기 SR 발열체(7)는 전기 온수기에 구비되던 전통적인 히터 혹은 발열체와는 달리 특정한 온도 영역에서 정확한 온도조절이 가능하고, 시간에 따른 전력 및 온도의 자기제어가 가능하며, 일정한 비등점 온도까지 상승한 이후에는 최소한의 전력 공급을 유지하기 때문에 전력소비량을 대폭 절감할 수 있도록 구성된다. 따라서 온수탱크(2) 내의 물을 신속하게 가열하여 온도를 상승시키지만 전력소모는 극소화시킬 수 있게 된다. Subsequently, the configuration of the SR heating element 7 will be described in more detail. Unlike the conventional heater or the heating element provided in the electric water heater, the SR heating element 7 is capable of precise temperature control in a specific temperature range, self-control of power and temperature over time, and after rising to a constant boiling point temperature. It maintains a minimum power supply and is configured to greatly reduce power consumption. Therefore, the water in the hot water tank 2 is rapidly heated to increase the temperature, but the power consumption can be minimized.
도 4는 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 구조를 확대하여 나타낸 단면도이고, 도 5는 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 실시예와 비교예에 따른 온도 조절 성능을 나타낸 그래프이며, 도 6은 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 전력실험 결과를 나타낸 그래프이며, 도 7은 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 임피던스 실험 결과를 나타낸 그래프이며, 도 8은 본 발명에 의한 전기 온수기에 적용된 SR 발열체의 온도변화 실험 결과를 나타낸 그래프이다. Figure 4 is a cross-sectional view showing an enlarged structure of the SR heating element applied to the electric water heater according to the present invention, Figure 5 is a graph showing the temperature control performance according to the embodiment and comparative example of the SR heating element applied to the electric water heater according to the present invention. 6 is a graph showing a power test result of the SR heating element applied to the electric water heater according to the present invention, FIG. 7 is a graph showing an impedance test result of the SR heating element applied to the electric water heater according to the present invention, and FIG. Is a graph showing the results of a temperature change experiment of the SR heating element applied to the electric water heater.
도시된 바와 같이, 본 발명에 따른 SR 발열체(7)는 전원공급 제어기(22)의 전원장치로부터 전원을 공급받아 발열하게 된다. 이와 같은 SR 발열체(7)는 온도 자가조절 기능을 수행하게 되는 것으로, 주위의 온도환경에 대응하여 발열 상태를 조절하면서 온도가 설정온도 범위로 일정하게 유지되도록 한다. 즉, SR 발열체(7)는 SR 발열체(7) 주위의 정해진 영역 온도가 설정된 온도를 지속적으로 유지하도록 하는데, SR 발열체(7) 주위의 정해진 영역 온도가 외부의 영향 등으로 설정된 온도값보다 낮아지게 되면 고온으로 발열하여 SR 발열체(7) 주위의 정해진 영역 온도가 설정된 온도로 신속하게 도달하도록 하고, SR 발열체(7) 주위의 정해진 영역 온도가 높아지면 오프 동작하면서 SR 발열체(7) 주위의 정해진 영역 온도가 낮추어지도록 한다. 또한, SR 발열체(7)는 SR 발열체(7) 주위의 정해진 영역 온도와 설정된 온도 간의 차이에 따라 발열상태가 조절되는데, SR 발열체(7) 주위의 정해진 영역 온도와 설정된 온도 간 차이가 클수록 고온으로 발열하여 신속한 온도 상승이 도모되도록 하는 성능을 가지고 있다.As shown, the SR heating element 7 according to the present invention is supplied with power from the power supply of the power supply controller 22 to generate heat. Such SR heating element 7 is to perform a temperature self-regulation function, so that the temperature is kept constant in the set temperature range while adjusting the heating state in response to the ambient temperature environment. That is, the SR heating element 7 keeps the predetermined temperature of the region around the SR heating element 7 continuously at a set temperature, so that the predetermined region temperature around the SR heating element 7 is lower than a temperature value set due to external influences or the like. When the heat is generated at a high temperature, the predetermined area temperature around the SR heating element 7 quickly reaches the set temperature. When the predetermined area temperature around the SR heating element 7 increases, the predetermined area around the SR heating element 7 is turned off. Allow the temperature to lower. In addition, the heat generating state of the SR heating element 7 is adjusted according to the difference between the predetermined region temperature around the SR heating element 7 and the set temperature, and as the difference between the predetermined region temperature and the set temperature around the SR heating element 7 increases, the temperature is increased. It has the ability to generate heat and allow rapid temperature rise.
이와 같은 SR 발열체(7)의 자가온도조절(Temperature Self-regulation) 기능은 전술된 것처럼 전기저항물질 성분과 절연바인더 성분 및 온도조절물질 성분이 혼합된 페이스트(paste)를 경화시켜 제작한 일정 두께의 필름 또는 코팅막에 의해 구현된다. 상기 SR 발열체(7)는 앞서 언급된 것처럼 판형의 형태로 형성되며 그 중간 중간에 물의 흐름을 허용하는 통공(7a)을 구비한다. 그리고 상기 온수탱크(2) 내에서 고정수단(16)에 의해 안정적으로 지지된다. As described above, the self-regulation function of the SR heating element 7 has a predetermined thickness produced by curing a paste in which an electric resistance material component, an insulation binder component, and a temperature control material component are mixed. It is implemented by a film or a coating film. The SR heating element 7 is formed in the form of a plate as mentioned above, and has a through hole 7a in the middle thereof to allow the flow of water. And it is stably supported by the fixing means 16 in the hot water tank (2).
도 4를 참조하면, 상기 SR 발열체(7)의 표면에는 전도로(conduction path)(72)가 형성되며, 상기 제어기(22)의 전원장치의 전원선(71)이 전도로(72)에 위치되어, SR 발열체(7)가 전도로(72)를 통해 전원을 전도받아 대략 150~450℃의 범위로 발열하게 된다.Referring to FIG. 4, a conduction path 72 is formed on the surface of the SR heating element 7, and the power line 71 of the power supply device of the controller 22 is located in the conduction path 72. Thus, the SR heating element 7 receives power through the conductive path 72 to generate heat in the range of approximately 150 to 450 ° C.
전술한 것과 같이, 상기 SR 발열체(7)는 전기저항물질 성분과 절연바인더 성분 및 조절물질 성분이 혼합된 페이스트(paste)가 경화되어 이루어지게 된다. 이와 같은 SR 발열체(7)는 스크린 프린트(screen print) 방식으로 내열성 기판에 도포되어 형성될 수 있다. 여기서, 상기 SR 발열체(7)는 130~160℃에서 8~12분 동안 적외선 광선이 나오는 컨베이어 용광로(conveyor furnace)에서 열처리된 후, 다시 180℃에서 20분간 열처리되어 만들어질 수 있다. 그리고, SR 발열체(7)의 표면에 전도로(72)를 형성하여 제어기(22)의 전원장치의 전원선(71)이 전도로(72)에 위치되면서 전원을 전도받아 발열하게 된다.As described above, the SR heating element 7 is made by curing a paste in which an electric resistance material component, an insulating binder component, and a control material component are mixed. The SR heating element 7 may be formed by being applied to a heat resistant substrate by a screen print method. Here, the SR heating element 7 may be heat-treated in a conveyor furnace that emits infrared rays for 8 to 12 minutes at 130 to 160 ° C., and then heat-treated at 180 ° C. for 20 minutes. Then, the conductive path 72 is formed on the surface of the SR heating element 7 so that the power line 71 of the power supply device of the controller 22 is positioned in the conductive path 72 to conduct electricity to generate heat.
한편, 본 발명의 실시예에 따른 SR 발열체(7)는 전기저항물질 성분이 50 내지 75 중량%, 절연바인더 성분이 5 내지 16 중량%, 온도조절물질 성분이 10 내지 40 중량%를 가지도록 구성된다. On the other hand, SR heating element 7 according to an embodiment of the present invention is configured to have 50 to 75% by weight of the electrical resistance material component, 5 to 16% by weight of the insulating binder component, 10 to 40% by weight of the temperature control material component do.
상기 전기저항물질 성분의 함량이 50 중량% 미만인 경우에는 발열체의 발열 성능을 구현하기에 미흡하기에 바람직하지 못하고, 75 중량%를 초과하는 경우에는 온도조절의 안정성이 저하되기 때문에 바람직하지 못하다. 또한, 절연바인더 성분의 함량이 5 중량% 미만인 경우에는 조성물의 결합력이 저하되기 때문에 바람직하지 못하고, 16 중량%를 초과하는 경우에는 저항 성분 등 기타 조성물의 성분 함량이 적어서 발열성능이 저하되기 때문에 바람직하지 못하다. 그리고, 온도조절물질 성분의 함량이 10 중량% 미만인 경우에는 특정 온도로 조절하는 기능을 실현하기에 부족하기에 바람직하지 못하고, 40 중량%를 초과하는 경우에는 저항 성분 등 기타 성분들의 함량이 너무 적게 되어 바람직하지 못하다. When the content of the electrical resistance material component is less than 50% by weight is not preferable to realize the heat generating performance of the heating element, when it exceeds 75% by weight is not preferable because the stability of the temperature control is lowered. In addition, when the content of the insulating binder component is less than 5% by weight, it is not preferable because the bonding strength of the composition is lowered. When the content of the insulating binder component is more than 16% by weight, the component content of other compositions such as the resistance component is low, so that the exothermic performance is lowered. I can't. In addition, when the content of the temperature control material component is less than 10% by weight, it is not desirable to be insufficient to realize the function of adjusting to a specific temperature, and when the content of the temperature control material exceeds 40% by weight, the content of other components such as the resistance component is too small. Not preferred.
여기서, 본 발명의 실시예에 따른 SR 발열체(7)는 전기저항물질 성분이 니켈(Ni)과 알루미늄(Al)을 포함하는 분말 혼합물 상태로 페이스트를 이루도록 한다. 이와 같은 전기저항물질 성분은 니켈이 전기저항물질 성분의 50 내지 60 중량%, 알루미늄이 전기저항물질 성분의 40 내지 50 중량%를 가지도록 구성되는데, 니켈이 전기저항물질 성분의 53 중량%, 알루미늄이 전기저항물질 성분의 47 중량%를 가지도록 구성되는 것이 바람직하다.Here, the SR heating element 7 according to the embodiment of the present invention forms a paste in a powder mixture state in which the electrical resistance material component includes nickel (Ni) and aluminum (Al). The electrical resistivity component is composed of nickel 50 to 60% by weight of the electrical resistance material component, aluminum 40 to 50% by weight of the electrical resistive material component, nickel 53% by weight of the electrical resistive material component, aluminum It is preferably configured to have 47% by weight of this electrical resistive substance component.
그리고, SR 발열체(7)의 전기저항물질 성분은 몰리브덴(Mo), 보론(B), 규소(Si) 등을 교정 성분(corrective ingredients)으로 가질 수 있다. 여기서, 몰리브덴은 페이스트의 0.05 내지 0.2at%, 보론은 페이스트의 0.005 내지 0.02at%로 구성되도록 하는데, 몰리브덴은 페이스트의 0.1at%, 보론은 페이스트의 0.01at%로 구성되도록 하는 것이 바람직하다.In addition, the electrical resistance material component of the SR heating element 7 may include molybdenum (Mo), boron (B), silicon (Si), and the like as corrective ingredients. Here, the molybdenum is 0.05 to 0.2 at% of the paste, the boron is to be composed of 0.005 to 0.02 at% of the paste, the molybdenum is preferably composed of 0.1 at% of the paste, the boron is composed of 0.01 at% of the paste.
이와 같은 전기저항물질 성분은 니켈, 알루미늄에 몰리브덴(Mo), 보론(B), 규소(Si) 등의 교정 성분(corrective ingredients)을 첨가하여 산소 유입없이 4~12시간 동안(바람직하게는 6-10시간 동안) 유성형 보올 밀(ball mill)의 폐쇄공간에서 제조될 수 있다. 여기서, SR 발열체(7)의 전기저항물질 성분을 이루는 입자 간 분산(dispersion)값은 0.1 내지 10㎛ 범위에서 형성되도록 하는데, 더욱 바람직하게는 0.5 내지 5㎛ 범위에서 입자 간 분산(dispersion)값이 형성되도록 한다. 그리고, 비표면적(specific surface area)은 200 ㎡/g 이하인 것이 바람직하다. 이와 같은 전기저항물질 성분을 이루는 입자 간 분산값은 SR 발열체(7)의 저항온도계수(TCR:temperature coefficient of resistance)와 연동되는 것으로, SR 발열체(7)의 저항온도계수는 전기저항물질 성분을 이루는 입자 간 분산값에 의해 조절된다. 여기서, 전기저항물질 성분을 이루는 입자 간 분산값은 전기저항물질 성분이 유성형 보올 밀(ball mill)의 폐쇄공간에 머무는 시간에 의해 조절되게 된다. The electrical resistive substance is added to nickel and aluminum by adding corrective ingredients such as molybdenum (Mo), boron (B), and silicon (Si) for 4 to 12 hours (preferably 6- 10 hours) in a closed space of a planetary ball mill. Herein, the dispersion value between particles constituting the electrical resistance material component of the SR heating element 7 is formed in the range of 0.1 to 10 μm, more preferably, the dispersion value between particles in the range of 0.5 to 5 μm. To form. In addition, the specific surface area is preferably 200 m 2 / g or less. The dispersion value between the particles constituting the electrical resistance material component is linked to the temperature coefficient of resistance (TCR) of the SR heating element 7, and the resistance temperature coefficient of the SR heating element 7 is the electrical resistance material component. It is controlled by the dispersion value between particles. Here, the dispersion value between the particles constituting the electrical resistance material component is controlled by the time the electrical resistance material component stays in the closed space of the planetary ball mill.
그리고, 상기 SR 발열체(7)의 절연바인더 성분은 폴리에스테르(polyester), 에폭시(epoxy)수지, 에폭시-페놀 라커(epoxy phenol laquer) 조성물 등에서 선택된 것으로 이루어진다. 상기 절연바인더 성분이 페이스트의 10 내지 16 중량%로 구성될 경우, 안정화 첨가물인 나노구조의 규소(Si) 분말이 절연바인더 성분에 첨가될 수 있다. 여기서, 이와 같은 규소는 페이스트의 0.3 내지 0.7at%로 구성될 수 있는데, 0.4 내지 0.6at%으로 구성되도록 하는 것이 바람직하다. 이와 같은 규소는 SR 발열체(7) 제조시 SR 발열체(7)의 구조 형성 시간을 단축시키며, 설정되어 구현된 SR 발열체(7)의 저항온도계수가 장기간 유지될 수 있도록 한다.In addition, the insulating binder component of the SR heating element 7 is selected from a polyester, an epoxy resin, an epoxy-phenol lacquer composition, and the like. When the insulating binder component is composed of 10 to 16% by weight of the paste, nanostructured silicon (Si) powder, which is a stabilizing additive, may be added to the insulating binder component. Here, such silicon may be composed of 0.3 to 0.7 at% of the paste, preferably 0.4 to 0.6 at%. Such silicon shortens the structure formation time of the SR heating element 7 when manufacturing the SR heating element 7, and allows the resistance temperature coefficient of the SR heating element 7 which is set and implemented to be maintained for a long time.
또한, 상기 SR 발열체(7)는 온도조절물질 성분을 통하여 통전된 상태에서 약 150~450℃로 조절하는 역할을 한다. 이와 같이 온도조절물질 성분으로서 특정한 물질이 적절한 함량으로 포함되어야 발열체의 과열을 방지하고, 적절한 전력을 소모하는데 기여하는 것이다. SR 발열체(7)의 온도조절물질 성분으로는 납성분이 없는 유리(lead-free-glass) 분말 혼합물 상태로 페이스트를 이루도록 하는데, 이와 같은 유리 분말 혼합물은 SiO₂, BaO, B₂O₃, Al₂O₃로 이루어진 군으로부터 선택된 하나의 이상의 산화물인 것이 바람직하다. In addition, the SR heating element (7) serves to adjust to about 150 ~ 450 ℃ in the energized state through the temperature control material component. As such, a specific material must be included as an appropriate temperature control material component to prevent overheating of the heating element and to contribute to the proper power consumption. The temperature control material of the SR heating element 7 forms a paste in the form of a lead-free-glass powder mixture. The glass powder mixture is obtained from the group consisting of SiO₂, BaO, B₂O₃, and Al₂O₃. It is preferred that it is at least one oxide selected.
여기서, SR 발열체(7)의 온도조절물질 성분은 산소 유입없이 4~12시간 동안(바람직하게는 6~10시간 동안) 유성형 보올 밀(ball mill)의 폐쇄공간에서 제조될 수 있다. 한편, SR 발열체(7)의 온도조절물질 성분은 입자 간 분산(dispersion)값이 0.05 내지 2㎛의 범위에서 형성되도록 하는데, 바람직하게는 0.1 내지 1.0㎛의 범위에서 입자 간 분산값이 형성되도록 한다. 온도조절물질 성분을 이루는 입자 간 분산값은 온도조절물질 성분이 유성형 보올 밀(ball mill)의 폐쇄공간에 머무는 시간에 의해 조절되게 된다. Here, the temperature control material component of the SR heating element 7 may be manufactured in a closed space of a planetary ball mill for 4-12 hours (preferably 6-10 hours) without oxygen inflow. On the other hand, the temperature control material component of the SR heating element 7 is such that the dispersion (dispersion) value between particles is formed in the range of 0.05 to 2㎛, preferably to form the dispersion value between particles in the range of 0.1 to 1.0㎛ . The dispersion value between particles constituting the thermostat component is controlled by the time that the thermostat component stays in the closed space of the planetary ball mill.
이와 같은 SR 발열체(7)의 온도조절물질 성분은 ZnO, Al, TiO₂, Bi₂O₃BaTiO 등을 포함하는 교정 성분(corrective ingredients)을 첨가할 수 있는데, 이와 같은 온도조절물질 성분의 교정 성분을 이루는 입자 간 이산(discretisation)은 0.05 내지 0.4㎛ 범위에서 형성될 수 있는데, 바람직하게는 0.1 내지 0.3㎛ 범위에서 형성되도록 한다. 또한, SR 발열체(7)의 온도조절물질 성분은 나이오븀(Nb), 안티몬(Sb), 이트륨(Y), 란탄(La) 등을 포함하여 이루어진 혼합물을 공여체(donor)로 가지게 된다. 이와 같은 공여체(donor)는 높은 용적 전도도(volume conductivity)를 획득하기 위해 첨가된다.The temperature control material component of the SR heating element 7 may add a corrective ingredient including ZnO, Al, TiO₂, Bi₂O₃BaTiO, etc., the discrete particles between the particles forming the correction component of such a temperature control material component (discretisation) can be formed in the range of 0.05 to 0.4 μm, preferably to be formed in the range of 0.1 to 0.3 μm. In addition, the temperature control material component of the SR heating element 7 has a mixture including niobium (Nb), antimony (Sb), yttrium (Y), lanthanum (La), and the like as a donor. Such donors are added to obtain high volume conductivity.
상기와 같이 구성되는 본 발명의 실시예에 따른 SR 발열체(7)는 0.05 내지 1.9 Ω/□(바람직하게는 0.09 내지 0.9 Ω/□)의 저항값을 가지는데, 본 발명의 실시예에 따른 SR 발열체(7)는 전기저항물질 성분, 절연바인더 성분, 온도조절물질 성분의 중량비 조절에 의해 SR 발열체(7)의 저항값을 변경시키게 된다. SR heating element 7 according to an embodiment of the present invention configured as described above has a resistance value of 0.05 to 1.9 Ω / □ (preferably 0.09 to 0.9 Ω / □), SR according to an embodiment of the present invention The heating element 7 changes the resistance value of the SR heating element 7 by adjusting the weight ratio of the electrical resistance material component, the insulation binder component, and the temperature control material component.
또한, 상기와 같이 구성되는 본 발명의 실시예에 따른 SR 발열체(7)는 500 내지 50×10-4/℃(바람직하게는 560×10-6 ~ 40×10-4/℃)의 저항온도계수(TCR)를 가지는데, 본 발명의 실시예에 따른 SR 발열체(7)는 전기저항물질 성분, 절연바인더 성분, 온도조절물질 성분의 중량비 조절에 의해 SR 발열체(7)의 저항온도계수를 변경시키게 된다.In addition, the SR heating element 7 according to the embodiment of the present invention configured as described above is a resistance thermometer of 500 to 50 × 10 -4 / ℃ (preferably 560 × 10 -6 to 40 × 10 -4 / ℃) It has a number (TCR), the SR heating element 7 according to the embodiment of the present invention changes the resistance temperature coefficient of the SR heating element 7 by adjusting the weight ratio of the electrical resistance material component, the insulation binder component, the temperature control material component Let's go.
상기와 같은 성분들로 이루어진 SR 발열체(7)의 성능을 알아보기 위하여, 에폭시 수지 7g, 니켈-알루미늄(Ni-53%, Al-47%) 70g, SiO2-BaO-B2O3-Al2O3 23g를 에탄올 200g에 분산하고 프리 믹싱한 후 고속으로 교반하여 본 발명의 SR 발열체(7)(실시예 1)를 제조하고, 에폭시 페놀 래커 수지 20g, NiAl[(Ni-53%, Al-47%)(45wt%)]-B(5wt%)-Mo(30wt%)-Si(20wt%) 60g을 에탄올 200g에 분산하고 프리 믹싱한 후 고속으로 교반하여 비교예 1의 발열체를 제조한 다음, 상기 실시예 1 및 비교예 1에 대하여 전력실험, 임피던스, 온도제어 실험을 실시하였고, 그 결과를 도 6 내지 9에 도시하였다. In order to determine the performance of the SR heating element 7 composed of the above components, 7g of epoxy resin, 70g of nickel-aluminum (Ni-53%, Al-47%), SiO 2 -BaO-B 2 O 3 -Al 23 g of 2 O 3 was dispersed in 200 g of ethanol, premixed, and stirred at high speed to prepare SR heating element 7 (Example 1) of the present invention, and 20 g of epoxy phenol lacquer resin, NiAl [(Ni-53%, Al 60g of -47%) (45wt%)]-B (5wt%)-Mo (30wt%)-Si (20wt%) was dispersed in 200g of ethanol, premixed and stirred at high speed to prepare the heating element of Comparative Example 1. Next, a power test, an impedance, and a temperature control test were performed for Example 1 and Comparative Example 1, and the results are shown in FIGS. 6 to 9.
먼저, 도 5는 상기 실시예 1과 비교예 1에 따른 온도 조절 성능을 나타낸 그래프로, 선분 1은 비교예 1에 따른 온도 증가 곡선을 나타내고, 선분 2는 본 발명에 따른 SR 발열체(7)의 온도 증가를 나타낸 것으로, 본 발명의 SR 발열체(7)(실시예 1)는 온도가 일정값 이상이 되면 저항값이 급격히 증가하는 것을 볼 수 있다.First, Figure 5 is a graph showing the temperature control performance according to Example 1 and Comparative Example 1, the line segment 1 shows a temperature increase curve according to Comparative Example 1, the line segment 2 of the SR heating element 7 according to the present invention As the temperature is increased, the SR heating element 7 (Example 1) of the present invention can be seen that the resistance increases rapidly when the temperature is above a certain value.
또한, 도 6 내지 도 8에 도시된 전력실험 결과와 임피던스 실험 결과, 온도변화 실험 결과를 참조하면, 온도는 실시예 1과 비교예 1이 유사하게 증가하고 있다. 그러나 실시예 1은 시간에 따라 저항값(임피던스)이 증가하여 전력사용량이 감소하는 것을 확인할 수 있고, 비교예 1은 임피던스도 거의 일정하게 나타나고 전력사용량도 거의 일정하게 나타난다. 따라서, 본 발명의 SR 발열체(7)는 시간에 따라 저항값이 증가하여 전력사용량을 감소시킬 수 있고, 저항값의 증가(물질 특성)로 인하여 시간에 따른 전력 및 온도 자기제어(Self-Regulation)이 가능하다는 것을 확인할 수 있다. In addition, referring to the power test results, the impedance test results, and the temperature change test results shown in FIGS. 6 to 8, the temperature is similarly increased in Example 1 and Comparative Example 1. However, in Example 1, the resistance value (impedance) increases with time, and thus the power usage decreases. In Comparative Example 1, the impedance is almost constant and the power consumption is almost constant. Therefore, the SR heating element 7 of the present invention can increase the resistance value with time to reduce the power consumption, and the power and temperature self-regulation with time due to the increase in the resistance value (material characteristics). You can see that this is possible.
전술한 것과 같이, 본 발명의 전기 온수기는 SR 발열체(7)가 주위의 온도환경에 대응하여 발열 상태를 조절하면서 온도가 일정하게 유지되도록 하므로, 온수탱크(2) 내의 물을 신속하게 가열하여 온도를 상승시킬 수 있고 적은 전력소모만으로도 상승된 온도를 지속적으로 유지할 수 있는 것이다.As described above, since the electric water heater of the present invention allows the SR heating element 7 to maintain a constant temperature while controlling the heat generation state in response to the surrounding temperature environment, the water in the hot water tank 2 is quickly heated to a temperature. It can increase the temperature and maintain the elevated temperature with low power consumption.
이상에서 본 발명의 바람직한 실시예를 설명하였으나. 본 발명은 다양한 변화와 변경 및 균등물을 사용할 수 있다. 본 발명은 상기 실시예를 적절히 변형하여 동일하게 응용할 수 있음이 명확하다. 따라서 상기 기재 내용은 하기 특허청구범위의 한계에 의해 정해지는 본 발명의 범위를 한정하는 것이 아니다. The preferred embodiment of the present invention has been described above. The present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.
Claims (26)
- 냉수유입구와 온수배출구를 구비하는 온수탱크와;A hot water tank having a cold water inlet and a hot water outlet;상기 온수탱크 내에 내장되도록 설치되고 공급되는 전력에 의해 발열되어 물을 가열하되, 전기저항물질 성분과 절연바인더 성분 및 온도조절물질 성분이 혼합된 페이스트(paste)가 경화되어 이루어져 전원을 공급받아 발열하고, 온도 자가조절 기능을 수행하여 정해진 영역의 온도가 일정하게 유지되도록 하는 SR 발열체(self regulation heating element)를 포함하여 구성되는 온도 자가조절형 발열체를 적용한 전기 온수기.The water is heated by the electric power installed and installed in the hot water tank to heat water, and a paste mixed with an electric resistance material component, an insulation binder component, and a temperature control material component is cured to generate heat by being supplied with power. The electric water heater to which the temperature self-regulating heating element is configured including a self-regulating heating element (SR) for performing a temperature self-regulation function to maintain a constant temperature in a predetermined region.
- 제1항에 있어서,The method of claim 1,상기 SR 발열체는 판형의 형태로 형성되되, 중간 중간에 물의 흐름을 허용하는 통공을 구비한 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The SR heating element is formed in the form of a plate, the electric water heater to which the temperature self-regulating heating element is applied, characterized in that it has a through hole allowing the flow of water in the middle.
- 제2항에 있어서,The method of claim 2,상기 온수탱크 내에는 물의 온도를 측정하는 수온센서가 구비되는 것을 특징으로 하는 전기 온수기.The hot water tank is an electric water heater, characterized in that a water temperature sensor for measuring the temperature of the water is provided.
- 제3항에 있어서,The method of claim 3,상기 온수탱크 내에는 물의 수위를 측정하는 수온감지센서가 더 설치되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.In the hot water tank, the electric water heater to which the temperature self-regulating heating element is further installed, characterized in that a water temperature sensor for measuring the water level is installed.
- 제2항에 있어서,The method of claim 2,상기 온수탱크 내의 상부와 하부에 각각 고정되고, 상기 SR 발열체의 상단과 하단을 슬라이딩 방식으로 끼워 지지하는 고정수단이 더 설치되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.An electric water heater to which the temperature self-regulating heating element is fixed, which is fixed to an upper portion and a lower portion of the hot water tank, and is further provided with fixing means for slidingly fitting the upper and lower ends of the SR heating element.
- 제1항에 있어서, The method of claim 1,상기 SR 발열체는 표면에 전도로(conduction path)가 형성되며, 상기 전도로에는 제어기의 전원선이 위치되어 제어기로부터 전원을 전도받아 발열하게 되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The SR heating element is a conductive path (conduction path) is formed on the surface, the power line of the controller is located in the conductive path is an electric water heater to which the heat self-regulating heating element is applied, characterized in that it generates heat by conducting power from the controller.
- 제1항에 있어서, The method of claim 1,상기 SR 발열체의 전기저항물질 성분은 50 내지 75 중량%이고, 절연바인더 성분이 5 내지 16 중량%이며, 온도조절물질 성분이 10 내지 40 중량%인 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The electric resistance material component of the SR heating element is 50 to 75% by weight, the insulating binder component is 5 to 16% by weight, the temperature control material component is electric applied to the self-regulating heating element, characterized in that 10 to 40% by weight water heater.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 전기저항물질 성분은 니켈(Ni)과 알루미늄(Al)을 포함하는 분말 혼합물 상태로 상기 페이스트를 이루게 되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The electric resistance material component of the SR heating element is an electric water heater using a temperature self-regulating heating element, characterized in that to form the paste in the form of a powder mixture containing nickel (Ni) and aluminum (Al).
- 제8항에 있어서, The method of claim 8,상기 니켈은 상기 전기저항물질 성분의 50 내지 60 중량%이고, 상기 알루미늄은 상기 전기저항물질 성분의 40 내지 50 중량%인 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The nickel is 50 to 60% by weight of the electrical resistance material component, the aluminum is 40 to 50% by weight of the electrical resistance material component electric water heater to which the self-regulating heating element is applied.
- 제8항에 있어서, The method of claim 8,상기 SR 발열체의 전기저항물질 성분은 몰리브덴(Mo), 보론(B), 규소(Si) 군 중에서 하나 이상이 선택되는 교정 성분(corrective ingredients)을 더 포함하는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The electric resistance material component of the SR heating element is a temperature self-regulating heating element further comprises a corrective ingredient (corrective ingredients) selected from one or more of the group of molybdenum (Mo), boron (B), silicon (Si) Applied electric water heater.
- 제10항에 있어서, The method of claim 10,상기 몰리브덴은 상기 페이스트의 0.05 내지 0.2at%이고, 상기 보론은 상기 페이스트의 0.005 내지 0.02at%인 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The molybdenum is 0.05 to 0.2 at% of the paste, the boron is 0.005 to 0.02 at% of the paste, the electric water heater to which the temperature self-regulating heating element is applied.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 전기저항물질 성분을 이루는 입자 간 분산(dispersion)값은 0.1 내지 10㎛이고, 상기 SR 발열체의 저항온도계수(TCR:temperature coefficient of resistance)는 상기 전기저항물질 성분을 이루는 입자 간 분산값에 의해 조절되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The dispersion value between particles constituting the electrical resistance material component of the SR heating element is 0.1 to 10 μm, and the temperature coefficient of resistance (TCR) of the SR heating element is dispersion among the particles constituting the electrical resistance material component. Electric water heater applying a temperature self-regulating heating element, characterized in that it is controlled by the value.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 절연바인더 성분은 폴리에스테르(polyester), 에폭시(epoxy)수지, 에폭시-페놀 라커(epoxy phenol laquer) 조성물 군 중에서 선택된 어느 하나로 이루어지는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The insulation binder component of the SR heating element is an electric water heater to which a temperature self-regulating heating element is applied, wherein the insulating binder component is one selected from the group consisting of polyester, epoxy resin, and epoxy-phenol lacquer composition.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 절연바인더 성분은 10 내지 16 중량%이되,The insulation binder component of the SR heating element is 10 to 16% by weight,상기 SR 발열체의 절연바인더 성분은 안정화 첨가물인 나노구조의 규소(Si) 분말을 더 포함하는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The insulation binder component of the SR heating element is an electric water heater to which the temperature self-regulating heating element further comprises a nanostructured silicon (Si) powder which is a stabilizing additive.
- 제14항에 있어서, The method of claim 14,상기 규소는 상기 페이스트의 0.3 내지 0.7at%인 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The silicon is an electric water heater to which the temperature self-regulating heating element is characterized in that 0.3 to 0.7 at% of the paste.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 조절물질 성분은 납성분이 없는 유리(lead-free-glass) 분말 혼합물 상태로 상기 페이스트를 이루게 되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The control material component of the SR heating element is an electric water heater using a temperature self-regulating heating element, characterized in that to form the paste in the form of a lead-free-glass powder mixture.
- 제16항에 있어서, The method of claim 16,상기 유리 분말 혼합물은 SiO₂, BaO, B₂O₃, Al₂O₃을 포함하는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The glass powder mixture is an electric water heater using a temperature self-regulating heating element, characterized in that containing SiO₂, BaO, B₂O₃, Al₂O₃.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 조절물질 성분을 이루는 입자 간 분산(dispersion)값은 0.05 내지 2㎛인 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.Dispersion value between particles constituting the control material component of the SR heating element is an electric water heater using a temperature self-regulating heating element, characterized in that 0.05 ~ 2㎛.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 조절물질 성분은 ZnO, Al, TiO₂, Bi₂O₃BaTiO 군 중에서 하나 이상이 선택되는 교정 성분(corrective ingredients)을 더 포함하는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The control material component of the SR heating element is an electric water heater to which the temperature self-regulating heating element further comprises a corrective ingredient selected from at least one of ZnO, Al, TiO₂, Bi₂O₃BaTiO group.
- 제19항에 있어서, The method of claim 19,상기 교정 성분을 이루는 입자 간 이산(discretisation)은 0.05 내지 0.4㎛인 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.Dispersion between particles constituting the calibration component is an electric water heater using a temperature self-regulating heating element, characterized in that 0.05 ~ 0.4㎛.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 조절물질 성분은 나이오븀(Nb), 안티몬(Sb), 이트륨(Y), 란탄(La) 군에서 하나 이상이 선택되는 혼합물을 공여체(donor)로 포함하게 되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.The modulator component of the SR heating element is a temperature characterized in that it comprises a mixture of at least one selected from the group of niobium (Nb), antimony (Sb), yttrium (Y), lanthanum (La) as a donor (donor) Electric water heater with self-regulating heating element.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 저항값은 0.05 내지 1.0 Ω/□이되,The resistance value of the SR heating element is 0.05 to 1.0 Ω / □,상기 SR 발열체를 이루는 전기저항물질 성분, 절연바인더 성분, 조절물질 성분의 중량비 조절에 의해 상기 SR 발열체의 저항값이 변경되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.An electric water heater to which the resistance value of the SR heating element is changed by adjusting the weight ratio of the electric resistance material component, the insulating binder component, and the adjusting substance component constituting the SR heating element.
- 제1항 내지 제7항 중 어느 한 항에 있어서, The method according to any one of claims 1 to 7,상기 SR 발열체의 저항온도계수는 500×10-6 내지 50×10-4/℃이되,Resistance temperature coefficient of the SR heating element is 500 × 10 -6 to 50 × 10 -4 / ℃,상기 SR 발열체를 이루는 전기저항물질 성분, 절연바인더 성분, 조절물질 성분의 중량비 조절에 의해 상기 SR 발열체의 저항온도계수가 변경되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기.An electric water heater using a temperature self-regulating heating element, characterized in that the resistance temperature coefficient of the SR heating element is changed by adjusting the weight ratio of the electrical resistance material component, the insulating binder component, and the adjusting substance component constituting the SR heating element.
- 전기저항물질 성분과 절연바인더 성분 및 온도조절물질 성분이 혼합된 SR 발열체 형성용 페이스트(paste)를 준비하는 단계와;Preparing an SR heating element-forming paste in which an electric resistance material component, an insulation binder component, and a temperature control material component are mixed;내열성 기판의 표면에 상기 SR 발열체 형성용 페이스트를 일정 두께로 도포하는 단계와;Applying the SR heating element-forming paste to a surface of a heat resistant substrate at a predetermined thickness;상기 SR 발열체 형성용 페이스트를 경화시키는 단계를 포함하는 온도 자가조절형 발열체를 적용한 전기 온수기의 제조방법.Method of manufacturing an electric water heater to which the temperature self-regulating heating element comprising the step of curing the paste for forming the SR heating element.
- 제24항에 있어서, The method of claim 24,상기 SR 발열체 페이스트는 스크린 프린트(screen print) 방식으로 내열성 기판에 도포되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기의 제조방법.The SR heating element paste is a method of manufacturing an electric water heater to which the temperature self-regulating heating element is applied to a heat resistant substrate by a screen print method.
- 제24항에 있어서, The method of claim 24,상기 전기저항물질 성분은 니켈, 알루미늄에 몰리브덴(Mo), 보론(B), 규소(Si) 등의 교정 성분(corrective ingredients)을 첨가하여 산소 유입없이 4~12시간 동안 유성형 보올 밀(ball mill)의 폐쇄공간에서 제조되는 것을 특징으로 하는 온도 자가조절형 발열체를 적용한 전기 온수기의 제조방법.The electrical resistive material is a planetary ball mill for 4 to 12 hours without oxygen inflow by adding corrective ingredients such as molybdenum (Mo), boron (B), and silicon (Si) to nickel and aluminum. Method of manufacturing an electric water heater to which the temperature self-regulated heating element is applied, which is manufactured in a closed space of the.
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| KR10-2011-0036810 | 2011-04-20 | ||
| KR1020110036810A KR20120119066A (en) | 2011-04-20 | 2011-04-20 | Electric water heater with self-regulation plane heating element and method for manufacturing the same |
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| WO2012144744A2 true WO2012144744A2 (en) | 2012-10-26 |
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Cited By (5)
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| CN103017340A (en) * | 2013-01-11 | 2013-04-03 | 山东澳华新能源有限公司 | Heat-storage water tank utilizing carbon-fiber electric heater |
| CN103994567A (en) * | 2013-02-14 | 2014-08-20 | 松下电器产业株式会社 | Water heater capable of storing heat water |
| CN105928210A (en) * | 2016-04-28 | 2016-09-07 | 珠海格力电器股份有限公司 | Control method and device for water heating device and water heating device |
| CN114001462A (en) * | 2021-02-06 | 2022-02-01 | 李高峰 | Water supply system, water mixing device and water supply method |
| CN115468301A (en) * | 2022-10-26 | 2022-12-13 | 中国核动力研究设计院 | Generating set energy consumption device |
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| DE112015003026T5 (en) * | 2014-06-25 | 2017-04-20 | Mag Aerospace Industries, Llc | Self-regulating inline heater |
| CN106016706A (en) * | 2016-07-15 | 2016-10-12 | 武夷山欧卡工业设计有限公司 | Energy accumulation boiling water boiler |
| CN108361994B (en) * | 2018-02-05 | 2021-10-22 | 广东美的暖通设备有限公司 | Water heater and control method and control device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103017340A (en) * | 2013-01-11 | 2013-04-03 | 山东澳华新能源有限公司 | Heat-storage water tank utilizing carbon-fiber electric heater |
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| CN105928210A (en) * | 2016-04-28 | 2016-09-07 | 珠海格力电器股份有限公司 | Control method and device for water heating device and water heating device |
| CN114001462A (en) * | 2021-02-06 | 2022-02-01 | 李高峰 | Water supply system, water mixing device and water supply method |
| CN115468301A (en) * | 2022-10-26 | 2022-12-13 | 中国核动力研究设计院 | Generating set energy consumption device |
Also Published As
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| KR20120119066A (en) | 2012-10-30 |
| WO2012144744A3 (en) | 2013-01-17 |
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