JP2005114332A - Energy-saving type electric hot-water supply facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide safe and low-cost energy-saving type electric hot-water supply facilities having a simple structure and low power consumption. <P>SOLUTION: In the energy-saving type electric hot-water supply facilities 10, 50, an expansion water generation section 20, a preheated water generation section 26, and a premixed hot water generation section 28 are provided at a hot water storage tank 12. The expansion water generated by the expansion water generation section is supplied to the premixed hot-water generation section for mixing the preheated water and the expansion water for generating the preheated mixed hot water, and the preheated mixed hot water is circulated to the expansion water generation section for efficiently supplying hot water. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric water heater, and more particularly, to an energy-saving electric water heater.

  In US Pat. No. 5,442,157, an electric heater is arranged in the upper and lower regions in the middle of the hot water storage tank, the water supply pipe is opened near the water surface, and the hot water supply pipe is opened below the hot water storage tank. Equipment is disclosed.

  In Japanese Patent Application Laid-Open No. 09-280655, a separator plate is disposed below the hot water storage tank, a lower heating part is formed below the hot water storage tank, a heater is accommodated in the heating part, and extends from the separator plate to above the hot water storage tank. A hot water guide pipe is arranged, an on-off valve is installed at the lower end of the hot water guide pipe, and when the water supply to the lower heating section becomes hot hot water, the on-off valve is opened to supply hot water through the hot water guide pipe. An immediate heating type electric water heater having a structure for guiding the hot water storage tank to the upper part is disclosed.

  In the electric hot water supply apparatus of US Pat. No. 5,442,157, the cold water supplied from the water supply pipe is directly mixed with the hot water in the upper part of the hot water storage tank and is introduced in the vicinity of the upper electric heater. It is absorbed by cold water and the temperature of the cold water does not rise easily. Further, the water supply that could not be sufficiently heated by the upper electric heater moves below the hot water storage tank at a low temperature. Therefore, the low temperature water supply reaches the lower region of the lower electric heater and lowers the temperature of the hot water in that region. Therefore, it took a long time to supply hot water from the outlet. If it is going to solve this problem, power consumption will become large and it was difficult to produce hot water at low cost. Furthermore, when this electric water heater is used as an indoor water heater, the expansion water or steam in the hot water storage tank is blown out from the pressure relief valve and falls to the floor. The expanded water is extremely dangerous for the user because of the high temperature, and inconvenience occurs in handling.

  Japanese Patent Application Laid-Open No. 09-280655 has a structure in which fresh cold water supplied from a water supply pipe flows directly into a lower heating portion to lower the temperature of hot water inside. When hot water is generated in the lower heating part, the on-off valve is opened to supply the hot water to the upper part of the hot water storage tank, but the cold water is in contact with the heater in the lower heating part. The heating time until the valve is opened becomes long, and hot water is not supplied to the upper part of the hot water storage tank having the hot water supply pipe for a relatively long time. Therefore, the heating time from the upper part of the hot water storage tank to passing through the hot water supply becomes extremely long, and the waiting time until the hot water is boiled and taken out after reaching the end of the hot water reaches almost one hour, which is very long. It was. Therefore, a large amount of power is consumed in order to continuously flow a large current through the electric heater before the hot water is boiled and taken out after the hot water has been used up. A countermeasure was desired. Further, the electric water heater has a drawback that the structure is complicated, the number of parts is large, and the manufacturing cost is inevitably high. Moreover, there was a problem because safety measures for the expansion water generated in the hot water storage tank were not taken.

  An object of the present invention is to solve the above-described problems, and to provide an energy-saving electric hot water supply facility that is simple in structure, low in cost, and can supply hot water safely with extremely low power consumption.

  According to the first aspect of the present invention, there is provided a hot water storage tank in which an energy-saving electric hot water supply facility has a water supply pipe and a hot water supply pipe, and expansion water generation that generates expansion water from premixed hot water disposed in a first region in the hot water storage tank. Disposed in the second region of the hot water storage tank, premixed hot water generating portion for premixing preheated water and expansion water to generate the premixed hot water, and disposed in the third region of the hot water storage tank. A preheated water generating unit that generates the preheated water from feed water by an outer wall of the expanded water generating unit and the premixed hot water generating unit, an expanded water supply pipe that supplies the expanded water to the premixed hot water generating unit, and A premixed hot water circulation path for circulating the premixed hot water from the premixed hot water generating section to the expansion water generating section, and a preheated water introduction pipe for introducing the preheated water from the preheated water generating section to the premixed hot water generating section With.

  According to a second aspect of the present invention, in the first aspect, the outer wall of the expansion water generation unit is configured by an infrared radiator, and includes a far infrared heater built in the expansion water generation unit.

  According to a third aspect of the present invention, there is provided a hot water storage tank in which an energy-saving electric hot water supply facility has a water supply pipe and a hot water supply pipe, a liquid layer that is disposed in a first region in the hot water storage tank and generates expansion water from premixed hot water, and expansion The preheated water is generated by premixing the preheated water and the expansion water, which is disposed in the second region of the hot water storage tank, and is formed in the second region of the hot water storage tank. A premixed hot water generating unit, a preheated water generating unit that is disposed in a third region of the hot water storage tank and generates the preheated water from the supply water by an outer wall of the expanded water generating unit and the premixed hot water generating unit, and the steam A steam supply line for supplying to the premixed hot water generator, a premixed hot water circuit for circulating the premixed hot water from the premixed hot water generator to the expansion water generator, and the preheat from the preheated water generator Water into the premixed hot water generator And a preheating water inlet pipe to enter.

  According to the energy-saving electric hot water supply equipment of the present invention, the expansion water generating unit provided in the hot water storage tank generates expansion water, the preheating water generating unit generates preheating water from the water supply on the outer wall of the expansion water generating unit, The expanded water is supplied to the premixed warm water generator and mixed with the preheated water to generate the premixed warm water. Using the specific gravity difference between the premixed warm water and the expanded water, the premixed warm water is supplied to the premixed warm water circulation path. Therefore, the expanded water generator is always supplied with premixed hot water and heated by the far-infrared heater, so that hot water can be generated rapidly. In addition, since the premixed hot water generating unit is arranged in the preheated water generating unit, the water supply in the upper part of the hot water storage tank is also heated by the outer wall of the premixed hot water generating unit, so that the preheated water is efficiently generated. The Therefore, it is possible to supply hot water with a simple structure and low power consumption.

  Hereinafter, each embodiment of the energy-saving electric hot water supply equipment of the present invention will be described with reference to the drawings.

  FIG. 1 shows an energy-saving electric hot water supply system according to a first embodiment of the present invention. In FIG. 1, an energy saving electric hot water supply facility 10 includes a hot water storage tank 12 having a first region 12A, a second region 12B, and a third region 12C. The water supply pipe 14 opens at the lower part of the third region 12C, and the hot water supply pipe 16 opens at the upper part of the first region 12A. In the first area 12 </ b> A of the hot water storage tank 12, an expanded water generating unit 20 is formed which is sealed by a partition plate (outer wall) 18 made of an infrared radiator. The expanded water production | generation part 20 has the high temperature part 20A and the low temperature part 20B. Although the expansion water generation unit 20 is shown as being surrounded by the side wall portion of the hot water storage tank 12 and the partition plate 18, the expansion water generation unit 20 is formed so that the partition plate 18 is formed in a box shape and sealed therein. May be formed. The partition wall plate 18 of the hot water storage tank 12 also functions as an infrared radiator, and is heated by far-infrared rays, which will be described later, to radiate infrared radiation energy to heat the water supply that is in contact with the expanded water generating unit 20. A far-infrared heater 22 is accommodated in the expanded water generation unit 20, and the power supply is controlled by the controller 24. The far-infrared heater 22 is composed of a carbon wire heating element and an insulator such as a quartz glass coating layer coated on the carbon wire heating element, and the surface temperature instantaneously rises to 500 to 1200 ° C. when the carbon wire heating element is energized. , Instantly generate expanded water from premixed hot water. Further, a preheated water generating unit 26 is formed in the third region 12C of the hot water storage tank 12.

  A premixed hot water generator 28 is disposed in the second region 12B of the hot water storage tank 12, and an outer wall portion of the premixed hot water generator 28 is exposed to the preheated water generator 26 to heat the preheated water. The premixed hot water generating unit 28 includes a cylindrical or rectangular premixed hot water generating chamber 30 whose both ends are closed, and the premixed hot water generating chamber 30 is separated into an air layer 30A and a liquid layer 30B. The premixed hot water generating chamber 30 includes a preheated water introduction pipe 32, and the upper end and the lower end of the preheated water introduction pipe 32 communicate with the air layer 30A and the upper part of the preheated water generation unit 26, respectively. 26 preheated water is introduced into the premixed hot water generating chamber 30. Further, the upper end portion of the expansion water supply pipe 34 is opened to the air layer 30A of the premixed hot water generation chamber 30, and the lower end portion thereof opens to the high temperature portion 20A through the partition plate 18 of the expansion water generation portion 20, The expanded water of the high temperature part 20 </ b> A is supplied to the premixed hot water generation chamber 30. Further, in order to circulate the premixed hot water in the premixed hot water generation chamber 30 to the expansion water generation unit 20, one end opens to the premixed hot water generation chamber 30, and the other end opens to the low temperature unit 20 </ b> B of the expansion water generation unit 20. The premixed hot water circulation path 36 is arranged. Reference numeral 38 denotes an overflow pipe disposed in the second region 12B so that the upper end is slightly higher than the water level sensor 40 in order to prevent the water level of the hot water storage tank 12 from becoming higher than a predetermined value.

  A temperature sensor 42 is disposed at the bottom of the first region 12A of the hot water storage tank 12 to detect the temperature of the expanded water in the low temperature section 20B of the expanded water generating section 20. Further, a temperature sensor 44 is disposed below the third region 12C of the hot water storage tank 12 to detect the temperature of the preheated water. The temperature detection signals of these temperature sensors 42 and 44 are supplied to the controller 24. The controller 24 stores temperature control maps corresponding to the temperature sensors 42 and 44. For example, the set temperature is set to 95 ° C., for example, and the temperature of the preheated water below the second region 12B is set to the set temperature ( For example, when the temperature rises to 95 ° C., the supply of power to the far-infrared heater 22 is stopped.

  Next, the water heating operation of the energy saving electric hot water supply apparatus having the above configuration will be described. First, water supply from the water supply pipe 14 to the hot water storage tank 12 is started with the hot water supply pipe 16 opened. At this time, when the water level rises to the vicinity of the upper part of the premixed hot water generation chamber 30, a part of the water supply flows into the premixed hot water generation chamber 30 via the preheated water introduction pipe 32 and passes through the premixed hot water circulation path 36. The hot water supply pipe 16 is closed when it flows into the expanded water generation unit 20 and the supply of water from the hot water supply pipe 16 begins to flow out. Next, the water supply rises to the water level detection level of the water level sensor 40, and a water level detection signal is sent to the controller 24. At this time, the far-infrared heater 22 is energized by the controller 24 to heat the expanded water generating unit 20 to generate expanded water. Since the far-infrared heater 22 rises to 500 ° C. to 1000 ° C., high-temperature expanded water in which some steam is rapidly mixed is generated. The expanded water is blown out to the premixed hot water generating unit 28 via the expanded water supply pipe 34 and mixed with the preheated water in the liquid layer 30B to generate premixed hot water. Since the specific gravity of the premixed warm water is heavier than the specific gravity of the expanded water, it is circulated to the expanded water generating unit 20 via the premixed warm water circulation path 36 and heated again to expand the expanded water supply pipe 34 as expanded water. To the premixed hot water generator 28. These series of steps are repeated, and the temperature of the premixed warm water in the premixed warm water generating unit 28 rises. During this time, the feed water existing in the lower region of the preheated water generating unit 26 is also heated by infrared rays by the partition plate 18 of the expanded water generating unit 20, and the feed water existing in the higher region of the preheated water generating unit 26 is premixed hot water. Preheated water is rapidly generated by being heated by the outer wall of the generator 28. When the preheated water in the low region of the preheated water generating unit 26 rises to a temperature near the set temperature (approximately 95 ° C.) (approximately 94 ° C.), the controller 24 stops energization of the far infrared heater 22. The temperature sensor 42 functions as a sensor for preventing idling, and stops energization of the far-infrared heater 22 via the controller 24 when the temperature of the expanded water generating unit 20 rises abnormally.

  Next, the hot water supply operation will be described. When the faucet is opened, hot water is supplied from the hot water supply pipe 16, a detection signal indicating a drop in the water level is output from the water level sensor 40 to the controller 24, a water supply valve (not shown) of the water supply pipe 14 is opened, and the hot water storage tank 12 is filled. To be supplied with water. When the preheated water in the low region of the preheated water generating unit 26 is lowered to the vicinity of the set temperature (approximately 95 ° C.) (approximately 94 ° C.) by this water supply, the controller 24 stops the water supply and energizes the far infrared heater 22. . In this way, the preheated water is kept in a predetermined temperature range while energizing the far infrared heater 22 by the controller 24 while gradually raising the water level. When hot water is supplied from the hot water supply pipe 16, the preheated water in the preheated water generating section 26 is introduced into the premixed hot water generating chamber 30 from the preheated water introduction pipe 32, where it is mixed with high-temperature expansion water and the premixed hot water is Generated. The premixed hot water is heated again by the far-infrared heater 22 in the expanded water generator 20 through the premixed hot water circulation path 36 and then supplied from the hot water supply pipe 16 to the outside.

  FIG. 2 shows an energy-saving electric hot water supply facility 50 according to the second embodiment. The same members as those in FIG. 1 are denoted by the same reference numerals, and redundant description is omitted. In the energy saving electric hot water supply facility 50 of the second embodiment, an air layer 20 </ b> C is formed in the expanded water generating unit 20. In this embodiment, when the pressure of the air layer 20C is increased by the vapor pressure, the steam is supplied from the air layer 20C to the premixed hot water generating unit 28 via the steam supply line 52, so that the premixed hot water is premixed. It is structured to circulate from the hot water generator 28 to the expanded water generator 20. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.

  In the above embodiment, the expansion water generating part is shown as being constituted by the side wall of the hot water storage tank and the partition plate, but the expansion water generating part is formed as a structure independent from the hot water storage tank and connected to the premixed hot water generating part. However, this independent unit may be inserted into the hot water storage tank.

Industrial applicability

  As is clear from the above description, according to the energy-saving electric hot water supply equipment of the present invention, the expansion water is generated at a high temperature of the far infrared heater 500 ° C. to 1000 ° C. of the expansion water generator provided in the hot water storage tank. Expanded water is mixed with preheated water in the premixed hot water generating unit to generate premixed hot water, and this premixed hot water is circulated to the expanded water generating unit and heated again, so that hot water is efficiently generated from the feed water. it can. In particular, when hot water is supplied, the preheated water in the preheated water generation unit is mixed again with the high temperature expanded water in the premixed hot water generated unit, and the premixed hot water is generated at a temperature higher than the preheated water. Therefore, the hot water supply can be continued for a long time. Therefore, hot water can be supplied with a simple structure and with low power consumption without greatly increasing the power capacity of the far infrared heater. Therefore, it is expected to be widely applied as a hot water supply device for household or business use or a hot water supply device for sterilization or cooking.

It is a schematic sectional drawing of 1st Embodiment of the energy saving type electric hot water supply equipment of this invention. It is a schematic sectional drawing of 2nd Embodiment of the energy saving type electric hot water supply equipment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 Hot water storage tank 14 Water supply pipe 16 Hot water supply pipe 20 Expansion water production | generation part 22 Far-infrared heater 24 Controller 26 Preheating water production | generation part 28 Premixed hot water production | generation part 32 Preheating water introduction line 34 Expansion water supply line 36 Premixed warm water circulation path 40 Water level sensors 42, 44 Temperature sensor 52 Steam supply line

Claims (3)

  A hot water storage tank having a hot water supply pipe and a hot water supply pipe, an expanded water generating section that is disposed in a first region in the hot water storage tank and generates expanded water from premixed hot water, and is disposed in a second region of the hot water storage tank and is preheated A premixed hot water generator that premixes water and expanded water to generate the premixed hot water, and an outer wall of the expanded water generator and the premixed hot water generator that is disposed in the third region of the hot water storage tank. A preheated water generating unit that generates the preheated water from feed water, an expanded water supply pipe that supplies the expanded water to the premixed hot water generated unit, and the expanded water generated from the premixed hot water generated unit An energy-saving electric hot water supply facility comprising: a premixed hot water circulation path that circulates in a section; and a preheated water introduction pipe that introduces the preheated water from the preheated water generating section into the premixed hot water generating section.   2. The energy-saving electric hot water supply equipment according to claim 1, wherein an outer wall of the expansion water generation unit is formed of an infrared radiator, and includes a far infrared heater built in the expansion water generation unit.   A hot water storage tank having a hot water supply pipe and a hot water supply pipe, a liquid layer arranged in the first region in the hot water storage tank and generating expansion water from premixed hot water, and an air layer whose pressure is increased by steam when generating the expansion water An expanded water generating unit, a premixed hot water generating unit disposed in a second region of the hot water storage tank to premix preheated water and expanded water to generate the premixed hot water, and a third region of the hot water storage tank A preheated water generating unit configured to generate the preheated water from the feed water by an outer wall of the expanded water generating unit and the premixed hot water generating unit, and a steam supply line for supplying the steam to the premixed hot water generating unit A premixed hot water circulation path for circulating the premixed hot water from the premixed hot water generating section to the expansion water generating section, and preheated water introduction for introducing the preheated water from the preheated water generating section into the premixed hot water generating section Energy-saving electricity Hot water supply equipment.

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