JP2007057145A - Heat storage and hot water storage type hot water supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact heat storage and hot water storage type hot water supply device requiring only a small installation space, capable of providing hot water supply performance that is equal to a conventional one. <P>SOLUTION: A heat storage can 1 filled with heat storage material 2 in an interior and provided with a heating means 3 and a hot water supply heat exchanger 6, and an electric heating can 7 provided with an electric heater 8 in an interior are provided in the same structure 26. Furthermore, since the hot water supply heat exchanger 6 in the heat storage can 1 and the electric heating can 7 are connected by piping to carry out hot water supply, by carrying out parallel usage of heat storage type hot water supply storing heat by using the heat storage material 2, and hot water storage type hot water supply of an electric water heater, the heat storage and water storage type hot water supply device has both good points of favorable economy and efficiency of a heat storage type, and favorable user-friendliness of additional boiling speed of electric heating. Particularly in the heat storage type hot water supply, by utilizing a heat storage material capable of absorbing and dissipating a larger amount of thermal energy than water, hot water supply of a capacity equal to a conventional one can be carried out by a small amount of the heat storage material, and only a very small heat storage can will be needed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hot water supply apparatus that combines a heat storage type hot water supply using a heat storage material and a hot water storage type hot water supply provided with an electric heater.

Conventionally, in this type of hot water supply equipment, hot water heated by an electric heater using midnight power etc. is stored in a hot water storage tank, and it is used for hot water during the day or at night, reducing running costs as much as possible, and efficient and economical. It was a hot water supply. (For example, see Patent Document 1)
Japanese Patent No. 3277455

  By the way, with this conventional one, if the hot water storage tank is inevitably made large in order not to run out of hot water or to increase the operation on the way, the heat insulating material becomes large, resulting in a large overall device. As a result, it has a problem that it takes a place of installation and is difficult to handle.

  This invention pays attention to this point, and in order to solve the above-mentioned drawbacks, in particular, in the configuration, in claim 1, a heat storage can body that is filled with a heat storage material inward and includes a heating means and a hot water supply heat exchanger, An electric temperature can body having an electric heater inside is provided in the same frame, and a hot water supply heat exchanger in the heat storage can body and the electric temperature can body are connected by piping to supply hot water.

  In claim 2, a heat storage can body that is filled with a heat storage material inside and includes a heating means and a heat exchanger for hot water supply, and an electric temperature can body that includes an electric heater inside are provided in the same frame. The hot water supply heat exchanger in the heat storage can body and the electric temperature can body are connected by piping, and hot water in the electric temperature can body is supplied to the hot water supply heat exchanger to supply hot water from the hot water supply pipe.

  In claim 3, a heat storage can body filled with a heat storage material inside and provided with a heating means and a heat exchanger for hot water supply and an electric temperature can body provided with an electric heater inside are provided in the same frame, The hot water supply heat exchanger in the heat storage can body and the electric temperature can body are connected by piping, and hot water after passing through the hot water supply heat exchanger is supplied to the electric temperature can body to supply hot water from the hot water supply pipe.

  According to a fourth aspect of the present invention, the heating means comprises a circulation circuit for circulating high-temperature water in the electric temperature can, a circulation pump, and a heat exchanger for heating provided in the heat storage can.

  The heating means is constituted by an electric heater.

  According to the first aspect of the present invention, the combined use of a regenerative hot water supply that stores heat using a heat storage material and a hot water storage hot water supply of an electric water heater makes it possible to improve the economics and efficiency of the regenerative heat storage, It has both the good point of use from the speed of boiling up, especially in the case of regenerative hot water, by using a heat storage material that can absorb and dissipate a larger amount of heat energy than water. It is possible to supply hot water with the same capacity as the conventional one with a small amount of heat storage material, the heat storage can body can be very small, the whole hot water supply equipment can be made compact, installation space is not required, and it is easy to handle It will be.

  According to the invention of claim 2, in addition to the above, the hot water first stored at the electric temperature is used as the hot water supply. Therefore, while the hot water is present, the heat storage in the heat storage can is not used much. It is efficient because there is no wasted heat release.

  Further, according to the invention of claim 3, in addition to the above, it is possible to use hot water stored in the electric temperature with certainty, the use of useless heat can be prevented, and when the hot water is not used, It is convenient to use because it is possible to continue hot water supply precisely by increasing the boiling point.

  According to the invention of claim 4, since the heat source of the heat storage can body is an electric heater of an electric temperature can body, one heat source is sufficient even if a plurality of heat sources are not prepared, and control is simplified and there is a risk of failure. There is no.

  According to the invention of claim 5, since the heat source of the heat storage can body is an electric heater different from the electric heater of the electric temperature can body, the heat source is increased and the control becomes complicated, but it is easy to manufacture and maintain. Is to be done.

Next, an embodiment of the heat storage and hot water storage type hot water supply apparatus of the present invention will be described with reference to FIG.
This heat storage and hot water storage type hot water supply device is used for hot water storage and hot water storage in the late night hours when the unit price of contracted electric power by time zone is low, and 1 is filled with the heat storage material 2 inward and in the central part A heat storage can comprising a heat exchanger 3 for heating constituting a heating means, and a bath heat exchanger 5 connected to a bath circulation path 4 and wound in a cylindrical shape is provided at the inner upper part thereof, and A hot water supply heat exchanger 6 wound in a cylindrical shape is also provided below.

  The heat storage material 2 uses latent heat generated by changing the phase from a solidified state to a molten state with a sodium-based wettable powder, and is an epoch-making equivalent to about 10 times hot water at a high temperature level near 90 ° C. It can absorb and dissipate a large amount of heat energy.

  Reference numeral 7 is an electric temperature can body provided with an electric heater 8 at the lower part, which is a direct pressure can body reinforced by connecting the upper end plate 9 and the lower end plate 10 with a reinforcing pipe 11, and a water supply thermistor 12 and a flow at the bottom. A water supply pipe 14 provided with a sensor 13 is connected, and a communication pipe 15 is provided in the upper part to allow hot water in the electric temperature can body 7 to flow into the hot water supply heat exchanger 6 in the heat storage can body 1.

  Reference numeral 16 denotes a circulation circuit that circulates hot water heated to a high temperature by the electric temperature can body 7 in the midnight time zone to the heat exchanger 3 for heating the heat storage can body 1 to store heat in the heat storage material 2. In the middle of the pipe 15, a circulation forward pipe 18 connected to the inlet side of the heating heat exchanger 3 via a two-way valve 17, and an outlet side of the heating heat exchanger 3 and a water supply pipe 14 via a two-way valve 19 are connected. The circulation return pipe 20 is connected to a circulation pump 21 provided in the middle of the circulation return pipe 20.

  22 is a hot water supply pipe connected to the other end of the hot water supply heat exchanger 6, and is provided with a hot water mixing valve 24 for mixing high temperature water and water supply from the water supply bypass pipe 23 bypassed from the water supply pipe 14. The hot and cold water mixing valve 24 is controlled so that the detected temperature of the hot water supply thermistor 25 that detects the hot and cold water temperature after mixing becomes the set temperature.

  Reference numeral 26 denotes a compact sized frame housing the heat storage can body 1, the electric temperature can body 7, and each pipe, and 27 is a pressure reducing valve that is connected to the upper portion of the electric temperature can body 7.

Next, the operation of this embodiment will be described.
First, the electric heater 8 is energized in the late-night power hours, and the hot water is heated to a high temperature in the electric temperature can 7 to store the hot water. In the heat storage can body 1, the high-temperature water in the electric temperature can body 7 is circulated to the heat exchanger 3 for heating by the circulation circuit 16 and is absorbed by the heat storage material 2. The hot water is replenished by energizing the electric heater 8.

  Furthermore, the heat storage material 2 in the heat storage can 1 starts to absorb heat from the solidified state and absorbs heat energy until it melts. However, the amount of heat stored (endothermic) reaches the point of about 90 ° C and melts (phase change). Greatly increases and becomes cloudy. Even after melting and clouding, the endothermic amount is small, but it absorbs heat and the amount of latent heat becomes maximum when it is completely melted, and a large amount of heat is stored in the heat storage can 1 during the midnight power hours.

  Then, by opening the hot water tap (not shown), the hot water in the electric temperature can body 7 passes from the communication pipe 15 through the hot water supply heat exchanger 6 in the heat storage can body 1, and the hot water in the hot water supply pipe 22. The hot water passes through the hot water supply heat exchanger 6 when the hot water temperature is higher than the endothermic temperature of the heat storage material 2. The heat absorption is not received and the heat absorption is not reduced.

  When the hot water supply further progresses and the hot water in the electric temperature can 7 disappears, the electric temperature can 7 is filled with water, and when hot water is requested in this state, the hot water is supplied to the heat exchanger 6 for hot water supply. By passing, the heat is received from the heat storage material 2 and heated to become high-temperature water, and hot water is supplied from the hot water supply pipe 22.

  In addition, the reheating and heat insulation of the bath are performed satisfactorily by being heated by heat radiation from the heat storage material 2 by circulating bath water in the bath heat exchanger 5.

  In this way, the combined use of the regenerative hot water supply that stores heat using the heat storage material 2 and the hot water storage hot water supply of the electric water heater enables the economic efficiency and efficiency of the regenerative heat storage system, and the rapid increase in electric temperature. It has both the good points of usability from the point of view, especially in the regenerative hot water supply, by using the heat storage material 2 that can absorb and dissipate a larger amount of heat energy than water, a small amount of The heat storage material 2 can supply hot water with the same capacity as the conventional one, the heat storage can 1 can be very small, the entire hot water supply equipment can be made compact, and there is no installation space, making it easy to handle. Is.

  Next, with respect to the other embodiment shown in FIG. 2, the same reference numerals are given to the same parts as those of the above-described one embodiment, and only different points will be described. An electric heater 28 is provided in the heat storage can 1 as a heating means. The hot water supply pipe 14 is connected to the inlet side of the hot water supply heat exchanger 6 in the heat storage can body 1, and the outlet side of the hot water supply heat exchanger 6 and the bottom of the electric temperature can body 7 are communicated by the communication pipe 15. The hot water supply pipe 22 is in direct communication with the upper part of the electric temperature can body 7.

  In the operation of this other embodiment, the two electric heaters 8 and 28 are energized during the midnight power hours, and the heat storage material 2 directly stores the heat in the heat storage can 1 by the heat generated by the electric heater 28. In the heat generation of the electric heater 8, hot water is stored in the electric temperature can body 7 as described above.

  When there is a hot water supply request, the water supplied from the water supply pipe 14 circulates through the heat exchanger 6 for hot water supply in the heat storage can 1 so that it is heated by heat radiation from the heat storage material 2 to become high-temperature water. 15, the hot water flowing in from the bottom of the electric temperature can body 7 is pushed out to the hot water supply pipe 22 and supplied as hot water.

  When the heat storage can body 1 has no heat stored, water is supplied from the communication pipe 15, so hot water stored in the electric temperature can body 7 is supplied for hot water supply, and hot water in the electric temperature can body 7 is further supplied. If there is no more, it is also possible to energize the electric heater 8 and supply it after boiling.

Therefore, it is possible to use hot water stored at electric temperature without fail, and it is possible to prevent the use of unnecessary heat, and when hot water is exhausted, hot water supply can be continued accurately by increasing the boiling temperature. Convenient to use.
In addition, since the heat source of the heat storage can body 1 is an electric heater 28 different from the electric heater 8 of the electric temperature can body 7, the heat source is increased and the control becomes complicated, but it is easy to manufacture and easy to maintain. is there.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the thermal storage type hot-water supply apparatus which shows one Embodiment of this invention. The schematic block diagram of the thermal storage type hot-water supply apparatus which shows other embodiment.

Explanation of symbols

1 Heat storage can body 2 Heat storage material 3 Heat exchanger for heating (heating means)
6 Heat Exchanger for Hot Water Supply 7 Electric Temperature Can Body 8 Electric Heater 26 Frame

Claims (5)

  A heat storage can body filled with a heat storage material on the inside and provided with a heating means and a heat exchanger for hot water supply and an electric temperature can body equipped with an electric heater on the inside are provided in the same frame, and further hot water supply in the heat storage can body Heat storage and hot water storage type hot water supply apparatus, characterized in that hot water supply is performed by pipe connection between a heat exchanger for electric use and an electric temperature can body.   A heat storage can body filled with a heat storage material on the inside and provided with a heating means and a heat exchanger for hot water supply and an electric temperature can body equipped with an electric heater on the inside are provided in the same frame, and further hot water supply in the heat storage can body A heat storage and hot water storage type hot water supply apparatus, characterized in that a heat exchanger for electric water and an electric temperature can body are connected by piping, hot water in the electric temperature can body is supplied to a heat exchanger for hot water supply, and hot water is supplied from a hot water supply pipe.   A heat storage can body filled with a heat storage material on the inside and provided with a heating means and a heat exchanger for hot water supply and an electric temperature can body equipped with an electric heater on the inside are provided in the same frame, and further hot water supply in the heat storage can body A heat storage and hot water storage type hot water supply apparatus, characterized in that a heat exchanger for electric water and an electric temperature can body are connected by piping, hot water after passing through the hot water supply heat exchanger is supplied to the electric temperature can body, and hot water is supplied from the hot water supply pipe.   The said heating means is comprised with the circulation circuit and the circulation pump which circulate the high temperature water in an electric temperature can body, and the heat exchanger for a heating provided in the thermal storage can body. Heat storage and hot water storage type water heater.   4. The heat storage and hot water storage type hot water supply apparatus according to claim 1, wherein the heating means is constituted by an electric heater.

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