US20070108304A1 - Hot water supply device - Google Patents
Hot water supply device Download PDFInfo
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- US20070108304A1 US20070108304A1 US11/526,716 US52671606A US2007108304A1 US 20070108304 A1 US20070108304 A1 US 20070108304A1 US 52671606 A US52671606 A US 52671606A US 2007108304 A1 US2007108304 A1 US 2007108304A1
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- Prior art keywords
- hot water
- heat storage
- water supply
- storage medium
- temperature
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Classifications
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- 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
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/04—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid
- F24H7/0408—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply
- F24H7/0433—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply the transfer medium being water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
Definitions
- the present invention relates to a hot water supply device used as a hot water supply system that supplies hot water from a hot water heater to a kitchen, a bathroom, a wash hand basin, or other hot water supply faucets, and in particular relates to a heat storage device with a heating function, provided on the hot water supply pipe of the hot water supply device that uses wax or a similar heat storage medium so that hot water at a predetermined temperature can be obtained instantaneously.
- the device shown schematically in FIG. 3 is known as this type of hot water supply device.
- 1 is a hot water heater comprising a commonly known heating source or heat exchanger or similar, and cold water is supplied to the hot water heater 1 by a pipe 3 that branches from a cold water supply pipe 2 in which tap water or similar cold water flows.
- 3 is a pressure regulating valve provided on the cold water supply pipe 2 .
- the hot water supply pipe 4 is a hot water supply pipe in which hot water heated in the hot water heater 1 is supplied, so that hot water is supplied for example to the hot water faucet of a wash hand basin 5 .
- the cold water supply pipe 2 is connected to the cold water faucet of the wash hand basin 5 , so that cold water can be supplied.
- the wash hand basin 4 or similar forming the hot water supply side is frequently located separated from the hot water heater 1 .
- the hot water supply pipe 4 becomes long, if supply of hot water is stopped for a while the heat in the hot water remaining in the pipe is gradually dispersed and the water cools. Then when the hot water supply is turned on again it is inevitable that cold water is discharged until the water remaining in the pipe has been discharged.
- a simple electrical water heater 6 is provided just before the hot water faucet of the wash hand basin 5 forming the hot water supply side of the hot water supply pipe 4 from the hot water heater 1 , so that the water remaining in the pipe 4 can be heated.
- water is stored in a hot water storage tank 7 , and the tank 7 itself heats the water using a heating unit and stores the hot water, and in this way when the hot water is opened again cold water is not discharged.
- 8 is a pressure regulating valve provided upstream of the hot water storage tank 7 , that suppresses the rises in pressure that occur due to thermal expansion and contraction of the hot water. Furthermore, as shown in the figure, to the rear and the front of the electrical water heater 6 , a reverse flow prevention valve with reverse flow prevention capability to prevent reverse flow and a flow rate control valve to control the flow rate of hot water into and out of the storage tank 6 are provided.
- a thermal shock absorber device has been proposed as a structure provided in the hot water supply pipe from the hot water heater to the hot water faucet or similar (see for example Japanese Utility Model Application Laid-open No. H1-42767).
- the thermal shock absorber device is constituted so that a heat exchange unit is provided on the hot water supply pipe, and a jacket is provided surrounding the heat exchange unit and wax or a similar heat storage medium is enclosed within the jacket, so that the water flowing in the pipe is maintained near a predetermined temperature by the heat storage medium via the heat exchange unit.
- a heat exchange unit is provided on the hot water supply pipe
- a jacket is provided surrounding the heat exchange unit and wax or a similar heat storage medium is enclosed within the jacket, so that the water flowing in the pipe is maintained near a predetermined temperature by the heat storage medium via the heat exchange unit.
- the heat storage medium that exchanges heat with the hot water via the heat exchange unit is formed from a material such as wax whose volume varies with thermal expansion and contraction, so it was necessary to form the jacket from a material that expands and contracts such as rubber, or provide a bellows in the part that encloses the space for the heat storage medium, so the structure became complex, and the size tended to be large.
- the casing has no strength, so it was necessary to install the casing in a location that would not affect the expansion and contraction, so there were limitations on the installation locations, and so on.
- the hot water supply device (the invention according to claim 1 ) is a hot water supply device comprising a heat storage device with a heating function which is provided on a hot water supply pipe and which indirectly heats water in the pipe using a heat storage medium to obtain hot water, the heat storage device with a heating function comprising: a piping portion connected to the hot water supply pipe; a heat storage medium that exchanges heat with the piping portion; and a casing disposed so as to enclose the heat storage medium and surround the piping portion, the piping portion comprising an elastically deformable bellows-shaped portion that exchanges heat with the heat storage medium, and the casing comprising heating means capable of heating the heat storage medium in accordance with temperature conditions thereof.
- the hot water supply device (the invention according to claim 2 ) is the hot water supply device according to claim 1 , further comprising: a temperature sensor that measures temperature of the heat storage medium; and a temperature controller that controls heating by the heating means in accordance with temperature information from the temperature sensor, wherein the temperature controller controls the temperature of the heat storage medium to a predetermined set temperature.
- the hot water supply device according to the present invention (the invention according to claim 3 ) is the hot water supply device according to claim 2 , wherein a melting point of the heat storage medium is equal to or less than the set temperature.
- the hot water supply device has the superior effect that, unlike the conventional electrical water heater, instantaneous heating is possible, so the hot water storage tank is not required, the pressure regulating valve is unnecessary, and the flow rate control valve that controls the quantity of hot water stored is unnecessary, so it is possible to make the overall size small and compact, there are no restrictions on the installation location or similar, the structure is simple, and furthermore it is possible to appropriately supply the required hot water as a hot water supply device.
- the piping portion is formed in a bellows shape, so changes in volume due to expansion and contraction of the heat storage medium can be absorbed, and also the surface area of the pipe is increased due to the bellows shape, which is advantageous from the point of view of the heat exchange efficiency.
- the heat storage device with heating function according to the present invention compact and has superior heat exchange efficiency, but also by measuring the temperature of the heat storage medium, the heating by the heating means is controlled to the required state, so it is possible to control the temperature of the supplied hot water to the required state, which has the advantage that when the hot water supply is opened again hot water can be instantaneously obtained.
- FIG. 1 shows an embodiment of the hot water supply device according to the present invention, a cross-section view of the principal parts showing the characteristic heat storage device with a heating function;
- FIG. 2 is a schematic diagram of the whole system showing an embodiment of the hot water supply device according to the present invention.
- FIG. 3 is a schematic diagram for explaining one example of conventional hot water supply device.
- FIG. 1 and FIG. 2 show one embodiment of the hot water supply device according to the present invention, and in these figures parts that are the same or equivalent to those in FIG. 3 and which have been described already are given the same reference numerals and their detailed explanation has been omitted.
- a heat storage device 10 with a heating function is provided, as shown in FIG. 2 .
- the heat storage device 10 with a heating function is installed on the hot water supply side of the hot water supply pipe 4 that supplies hot water from the hot water heater 1 to the hot water faucet of the wash hand basin 4 forming the hot water supply side.
- the heat storage device 10 with a heating function comprises a piping portion 11 formed from part of the hot water supply pipe 4 , a casing 12 comprising a cylindrical shaped case 12 a having a cylindrical shape with a bottom arranged so as to surround the piping portion 11 and a lid 12 b that closes one end of the case 12 a , a heat storage medium 13 such as wax or similar enclosed in the space formed within the casing 12 , and heating means 14 comprising a film heater or similar provided in the peripheral wall portion of the space within the casing 12 .
- the piping portion 11 referred to above is formed into a bellows-shaped portion 11 a in the part that is in contact with the heat storage medium 13 , so that the volumetric changes of the heat storage medium 13 due to thermal expansion and thermal contraction can be followed by the expansion and contraction of the bellows-shaped portion 11 a .
- O-rings 15 a , 15 b are provided to prevent liquid leakage of the heat storage medium 13 , formed so that there is no obstacle to the stroke movements of the piping portion 11 in the pipe direction that accompany the volumetric changes referred to above.
- a structure to allow this type of stroke movements may be provided on both ends of the piping portion 11 , or on one side only.
- 16 in the figure is a temperature sensor that measures the temperature of the heat storage medium 13
- 17 is a temperature control unit, that receives temperature information and the like from the temperature sensor and controls heating by the heating means 14 , constituted so that the heat storage medium 13 can be heated using the heating means 14 .
- a thermo-switch that turns ON or OFF at a fixed temperature may be used as the temperature sensor 16 .
- the temperature sensor 16 is a device suitable for determining whether the temperature of the heat storage medium 13 is greater than or less than a predetermined temperature, and for controlling whether to the heat storage medium 13 with the heating means 14 .
- the amount of heating by the heating means 14 may be small, and can be controlled by a comparatively small heating means 14 and temperature control unit 17 , so the present invention is superior from the practical point of view.
- a flow rate control valve 18 may be provided on the hot water supply side of the piping portion 11 to control the flow rate of the hot water according to the temperature, constituted so that appropriate temperature control can be carried out, but for example the hot water faucet in the wash hand basin 5 in FIG. 2 may be used as this type of flow rate control valve 18 .
- a reverse flow prevention valve 19 may be provided to prevent reverse flow to the water supply side.
- the heat storage medium 13 whose temperature fluctuates due to the heat exchange with the hot water, can be heated in advance by the heating means 14 in accordance with the temperature conditions. In other words, when the temperature of the hot water is low and the temperature of the heat storage medium 13 is low, heating can be carried out by the heating means 14 until a predetermined temperature is reached.
- the heat storage efficiency can be further improved.
- the heat storage temperature is controlled by the temperature sensor 16 and the temperature control unit 17 to be 90° C.
- the melting point of the heat storage medium 13 may be set near 70° C.
- the heated heat storage medium 13 is a heat source, and hot water that has exchanged heat via the bellows-shaped portion 11 a which is the heat exchange unit of the piping portion 11 can be heated to a predetermined temperature and supplied to the hot water supply side.
- the volumetric increase due to the thermal expansion due to heating of the heat storage medium 13 is absorbed by expansion and contraction of the elastically deformable bellows-shaped portion 11 a of the piping portion 11 .
- a hot water supply device using this type of heat storage device 10 with a heating function unlike the conventionally used electrical water heater, instantaneous heating is possible, so the hot water storage tank is not necessary, and therefore the pressure regulation valve is also unnecessary. Therefore, compared with a conventional device the overall form is more compact, the size of the device can be greatly reduced, and there are also structural advantages.
- the heat exchange unit of the piping portion 11 is a bellows-shaped shaped portion 11 a , so thermal expansions and so on of the heat storage medium 13 can be absorbed, also the surface area of the pipe is increased by the bellows-shaped portion 11 a , which has the advantage that the heat exchange efficiency can be increased.
- thermoelectric device 10 using this type of heat storage device 10 with a heating function, although the form is small and compact, cold water can be instantaneously heated to create hot water in a short period of time, so the hot water storage tank, in which hot water that is once heated is stored as in the conventional devices, can be eliminated.
- the volumetric changes of the hot water can be absorbed by the bellows-shaped portion 11 a as stated above, so a pressure control valve (pressure regulating valve or the like) to reduce the pressure rise due to volumetric expansion in the hot water supply pipe 4 as in the conventional device is unnecessary, which results in the advantage that the hot water supply device as a whole is smaller and simpler.
- a pressure control valve pressure regulating valve or the like
- the function of absorbing the volumetric changes of the heat storage medium 13 is provided by the piping portion 11 , so unlike the conventional device the casing 12 can be made from a rigid material, which has the advantage that the freedom of the installation location of the device 10 is increased.
- the hot water supply device using this type of heat storage device 10 with a heating function as described above can be made in an extremely compact form, so there are no restrictions on installation location, and the device can be installed directly before the hot water supply side.
- the pipe from the hot water heater 1 to the hot water supply faucet is long, so if hot water is not used for a while the hot water that was once heated becomes cold water, and when hot water is required again for a while cold water is discharged, which had the problem that it was a discomfort for the user, however, this can be solved by providing the hot water supply device using this type of heat storage device 10 with a heating function that is a characteristic of the present invention directly before the hot water supply side. This is because by doing so it is clear that hot water can be instantaneously supplied.
- heating by the heating means 14 is controlled by measuring the temperature and the like of the heat storage medium 13 , which has the advantage that the temperature of the supplied hot water can be controlled to be in the required state. Also, the electrical power consumption of the heating means 14 can be maintained at the lowest necessary level.
- the present invention is not limited to the structure explained in the embodiment described above, and it is unnecessary to say that the shape, structure, and so on of each part forming the hot water supply device may be changed and altered as appropriate.
- a wash hand basin 5 was shown as an example, but the present invention is not limited to this, and it is obvious that the present invention may be applied to the supply of hot water to a domestic water heater, bathtub or kitchen hot water supply faucet, or to the supply of hot water to a supplementary heating device for a bathtub, or similar.
- the heat storage device 10 with a heating function that is a characteristic of the present invention was explained for the case where the device is provided close to the hot water supply faucet of the wash hand basin 5 which is the hot water supply side, but the present invention is not limited to this, and the device may be incorporated within the hot water heater 1 for example.
Abstract
To obtain a hot water supply device that can be made small and compact, for which there is excellent freedom, for example, of installation of each part, and for which hot water at a predetermined temperature can be instantaneously obtained using a heat storage medium and the hot water can be supplied to the hot water supply side.
A heat storage device 10 with a heating function is provided on hot water supply pipe 4 for indirectly heating the water in the pipe to obtain hot water using a heat storage medium 13. The device comprises: a piping portion 11 connected to the hot water supply pipe; a heat storage medium that exchanges heat with the piping portion; and a casing 12 disposed so as to enclose the heat storage medium and surround the piping portion. The piping portion comprises an elastically deformable bellows-shaped portion 11 a that exchanges heat with the heat storage medium. The casing comprises heating means 14 capable of heating the heat storage medium in accordance with the temperature conditions.
Description
- 1. Field of the Invention
- The present invention relates to a hot water supply device used as a hot water supply system that supplies hot water from a hot water heater to a kitchen, a bathroom, a wash hand basin, or other hot water supply faucets, and in particular relates to a heat storage device with a heating function, provided on the hot water supply pipe of the hot water supply device that uses wax or a similar heat storage medium so that hot water at a predetermined temperature can be obtained instantaneously.
- 2. Description of the Related Art
- Conventionally, the device shown schematically in
FIG. 3 is known as this type of hot water supply device. Simply explained, 1 is a hot water heater comprising a commonly known heating source or heat exchanger or similar, and cold water is supplied to thehot water heater 1 by apipe 3 that branches from a coldwater supply pipe 2 in which tap water or similar cold water flows. 3 is a pressure regulating valve provided on the coldwater supply pipe 2. - 4 is a hot water supply pipe in which hot water heated in the
hot water heater 1 is supplied, so that hot water is supplied for example to the hot water faucet of awash hand basin 5. Also, the coldwater supply pipe 2 is connected to the cold water faucet of thewash hand basin 5, so that cold water can be supplied. - Incidentally, in this type of hot water supply device the
wash hand basin 4 or similar forming the hot water supply side is frequently located separated from thehot water heater 1. In this way, when the length of the hotwater supply pipe 4 becomes long, if supply of hot water is stopped for a while the heat in the hot water remaining in the pipe is gradually dispersed and the water cools. Then when the hot water supply is turned on again it is inevitable that cold water is discharged until the water remaining in the pipe has been discharged. - To eliminate this kind of problem in a conventional hot water supply device a simple
electrical water heater 6 is provided just before the hot water faucet of thewash hand basin 5 forming the hot water supply side of the hotwater supply pipe 4 from thehot water heater 1, so that the water remaining in thepipe 4 can be heated. In other words, water is stored in a hot water storage tank 7, and the tank 7 itself heats the water using a heating unit and stores the hot water, and in this way when the hot water is opened again cold water is not discharged. - In the figure, 8 is a pressure regulating valve provided upstream of the hot water storage tank 7, that suppresses the rises in pressure that occur due to thermal expansion and contraction of the hot water. Furthermore, as shown in the figure, to the rear and the front of the
electrical water heater 6, a reverse flow prevention valve with reverse flow prevention capability to prevent reverse flow and a flow rate control valve to control the flow rate of hot water into and out of thestorage tank 6 are provided. - Also, in the conventional hot water supply device as described above, to limit sudden variations in water temperature when supplying hot water heated in a boiler or hot water heater or similar to a kitchen, hot water faucets, room heating equipment, or the like, a thermal shock absorber device has been proposed as a structure provided in the hot water supply pipe from the hot water heater to the hot water faucet or similar (see for example Japanese Utility Model Application Laid-open No. H1-42767).
- Simply explained, the thermal shock absorber device is constituted so that a heat exchange unit is provided on the hot water supply pipe, and a jacket is provided surrounding the heat exchange unit and wax or a similar heat storage medium is enclosed within the jacket, so that the water flowing in the pipe is maintained near a predetermined temperature by the heat storage medium via the heat exchange unit. In other words, when the water temperature is too high heat is stored in the heat storage medium, and when the water temperature is too low the hot water is heated by the heat that has been stored.
- However, in the hot water supply devices as described above, each had the unavoidable problem that the structure is complex, and the size tends to be large, and after the hot water supply is turned off for a while and turned on again after a certain period of time has passed, cold water will be discharged.
- In other words, in the former conventional device, there were the problems that the overall device tended to be large because of the necessity to provide the
electric water heater 6 with the hot water storage tank 7 and thepressure regulating valve 8, and moreover there were restrictions on the location to install theelectric water heater 6, so there was no freedom of installation, and so on. - On the other hand, in the latter conventional device there were the problems that in the thermal shock absorber device used to maintain the predetermined water temperature, the heat storage medium that exchanges heat with the hot water via the heat exchange unit is formed from a material such as wax whose volume varies with thermal expansion and contraction, so it was necessary to form the jacket from a material that expands and contracts such as rubber, or provide a bellows in the part that encloses the space for the heat storage medium, so the structure became complex, and the size tended to be large.
- In particular, in a structure in which the jacket made from a material that expands and contracts in this way is the casing, the casing has no strength, so it was necessary to install the casing in a location that would not affect the expansion and contraction, so there were limitations on the installation locations, and so on.
- Furthermore, in the conventional device described above, when the required amount of heat is stored in the heat storage medium it is possible to heat water, but when there is no heat or insufficient heat stored, there was the problem that it was not possible to obtain hot water at the predetermined temperature.
- With the foregoing in mind, it is an object of the present invention to obtain a hot water supply device in which the overall system is small and compact, and for which there is freedom of installation of each part, and moreover by using wax or a similar heat storage medium, hot water at a predetermined temperature can be instantly obtained, and hot water is supplied to the hot water supply side.
- To achieve these objects the hot water supply device according to the present invention (the invention according to claim 1) is a hot water supply device comprising a heat storage device with a heating function which is provided on a hot water supply pipe and which indirectly heats water in the pipe using a heat storage medium to obtain hot water, the heat storage device with a heating function comprising: a piping portion connected to the hot water supply pipe; a heat storage medium that exchanges heat with the piping portion; and a casing disposed so as to enclose the heat storage medium and surround the piping portion, the piping portion comprising an elastically deformable bellows-shaped portion that exchanges heat with the heat storage medium, and the casing comprising heating means capable of heating the heat storage medium in accordance with temperature conditions thereof.
- The hot water supply device according to the present invention (the invention according to claim 2) is the hot water supply device according to
claim 1, further comprising: a temperature sensor that measures temperature of the heat storage medium; and a temperature controller that controls heating by the heating means in accordance with temperature information from the temperature sensor, wherein the temperature controller controls the temperature of the heat storage medium to a predetermined set temperature. - The hot water supply device according to the present invention (the invention according to claim 3) is the hot water supply device according to
claim 2, wherein a melting point of the heat storage medium is equal to or less than the set temperature. - As explained above, the hot water supply device according to the present invention has the superior effect that, unlike the conventional electrical water heater, instantaneous heating is possible, so the hot water storage tank is not required, the pressure regulating valve is unnecessary, and the flow rate control valve that controls the quantity of hot water stored is unnecessary, so it is possible to make the overall size small and compact, there are no restrictions on the installation location or similar, the structure is simple, and furthermore it is possible to appropriately supply the required hot water as a hot water supply device.
- In particular, in the present invention, according to the heat storage device with a heating function, the piping portion is formed in a bellows shape, so changes in volume due to expansion and contraction of the heat storage medium can be absorbed, and also the surface area of the pipe is increased due to the bellows shape, which is advantageous from the point of view of the heat exchange efficiency.
- Furthermore, not only is the heat storage device with heating function according to the present invention compact and has superior heat exchange efficiency, but also by measuring the temperature of the heat storage medium, the heating by the heating means is controlled to the required state, so it is possible to control the temperature of the supplied hot water to the required state, which has the advantage that when the hot water supply is opened again hot water can be instantaneously obtained.
-
FIG. 1 shows an embodiment of the hot water supply device according to the present invention, a cross-section view of the principal parts showing the characteristic heat storage device with a heating function; -
FIG. 2 is a schematic diagram of the whole system showing an embodiment of the hot water supply device according to the present invention; and -
FIG. 3 is a schematic diagram for explaining one example of conventional hot water supply device. -
FIG. 1 andFIG. 2 show one embodiment of the hot water supply device according to the present invention, and in these figures parts that are the same or equivalent to those inFIG. 3 and which have been described already are given the same reference numerals and their detailed explanation has been omitted. - According to the present invention, instead of the
electrical water heater 6 comprising the hot water storage tank 7 as described above inFIG. 3 , aheat storage device 10 with a heating function is provided, as shown inFIG. 2 . - Explaining the
heat storage device 10 with a heating function in detail usingFIG. 1 , theheat storage device 10 with a heating function is installed on the hot water supply side of the hotwater supply pipe 4 that supplies hot water from thehot water heater 1 to the hot water faucet of thewash hand basin 4 forming the hot water supply side. - The
heat storage device 10 with a heating function comprises a pipingportion 11 formed from part of the hotwater supply pipe 4, acasing 12 comprising a cylindrical shapedcase 12 a having a cylindrical shape with a bottom arranged so as to surround the pipingportion 11 and alid 12 b that closes one end of thecase 12 a, aheat storage medium 13 such as wax or similar enclosed in the space formed within thecasing 12, and heating means 14 comprising a film heater or similar provided in the peripheral wall portion of the space within thecasing 12. - Here, the piping
portion 11 referred to above is formed into a bellows-shapedportion 11 a in the part that is in contact with theheat storage medium 13, so that the volumetric changes of theheat storage medium 13 due to thermal expansion and thermal contraction can be followed by the expansion and contraction of the bellows-shapedportion 11 a. At the penetration portions where the pipingportion 11 penetrates thecasing 12, O-rings heat storage medium 13, formed so that there is no obstacle to the stroke movements of the pipingportion 11 in the pipe direction that accompany the volumetric changes referred to above. A structure to allow this type of stroke movements may be provided on both ends of the pipingportion 11, or on one side only. - Also, 16 in the figure is a temperature sensor that measures the temperature of the
heat storage medium heat storage medium 13 can be heated using the heating means 14. A thermo-switch that turns ON or OFF at a fixed temperature may be used as thetemperature sensor 16. In other words, thetemperature sensor 16 is a device suitable for determining whether the temperature of theheat storage medium 13 is greater than or less than a predetermined temperature, and for controlling whether to theheat storage medium 13 with the heating means 14. - Here, as stated above, when using the
heat storage medium 13 maintenance of temperature is superior and heat does not dissipate easily compared with the case where water or the pipe is directly heated, which has the advantage that heat once applied is not wasted and energy losses are small. Therefore, the amount of heating by the heating means 14 may be small, and can be controlled by a comparatively small heating means 14 andtemperature control unit 17, so the present invention is superior from the practical point of view. - Furthermore, a flow
rate control valve 18 may be provided on the hot water supply side of the pipingportion 11 to control the flow rate of the hot water according to the temperature, constituted so that appropriate temperature control can be carried out, but for example the hot water faucet in thewash hand basin 5 inFIG. 2 may be used as this type of flowrate control valve 18. - Also, on the
hot water heater 1 side of the pipingportion 11, a reverseflow prevention valve 19 may be provided to prevent reverse flow to the water supply side. - According to the
heat storage device 10 with a heating function as described above, theheat storage medium 13, whose temperature fluctuates due to the heat exchange with the hot water, can be heated in advance by the heating means 14 in accordance with the temperature conditions. In other words, when the temperature of the hot water is low and the temperature of theheat storage medium 13 is low, heating can be carried out by the heating means 14 until a predetermined temperature is reached. - At this time, by setting the melting point (the temperature at which it changes from solid to liquid) of the
heat storage medium 13 to be equal to or less than the set temperature, the heat storage efficiency can be further improved. For example, if the heat storage temperature is controlled by thetemperature sensor 16 and thetemperature control unit 17 to be 90° C., the melting point of theheat storage medium 13 may be set near 70° C. - According to this kind of configuration, the heated
heat storage medium 13 is a heat source, and hot water that has exchanged heat via the bellows-shapedportion 11 a which is the heat exchange unit of the pipingportion 11 can be heated to a predetermined temperature and supplied to the hot water supply side. - The volumetric increase due to the thermal expansion due to heating of the
heat storage medium 13 is absorbed by expansion and contraction of the elastically deformable bellows-shapedportion 11 a of the pipingportion 11. - Also, according to a hot water supply device using this type of
heat storage device 10 with a heating function, unlike the conventionally used electrical water heater, instantaneous heating is possible, so the hot water storage tank is not necessary, and therefore the pressure regulation valve is also unnecessary. Therefore, compared with a conventional device the overall form is more compact, the size of the device can be greatly reduced, and there are also structural advantages. - Also, according to a hot water supply device using this type of
heat storage device 10 with a heating function, the heat exchange unit of thepiping portion 11 is a bellows-shaped shapedportion 11 a, so thermal expansions and so on of theheat storage medium 13 can be absorbed, also the surface area of the pipe is increased by the bellows-shaped portion 11 a, which has the advantage that the heat exchange efficiency can be increased. - Therefore, according to a hot water supply device using this type of
heat storage device 10 with a heating function, although the form is small and compact, cold water can be instantaneously heated to create hot water in a short period of time, so the hot water storage tank, in which hot water that is once heated is stored as in the conventional devices, can be eliminated. - Also, the volumetric changes of the hot water can be absorbed by the bellows-
shaped portion 11 a as stated above, so a pressure control valve (pressure regulating valve or the like) to reduce the pressure rise due to volumetric expansion in the hotwater supply pipe 4 as in the conventional device is unnecessary, which results in the advantage that the hot water supply device as a whole is smaller and simpler. - Furthermore, in the hot water supply device using this type of
heat storage device 10 with a heating function as described above, the function of absorbing the volumetric changes of theheat storage medium 13 is provided by the pipingportion 11, so unlike the conventional device thecasing 12 can be made from a rigid material, which has the advantage that the freedom of the installation location of thedevice 10 is increased. - Also, the hot water supply device using this type of
heat storage device 10 with a heating function as described above can be made in an extremely compact form, so there are no restrictions on installation location, and the device can be installed directly before the hot water supply side. For example, in a hot water device for awash hand basin 5, the pipe from thehot water heater 1 to the hot water supply faucet is long, so if hot water is not used for a while the hot water that was once heated becomes cold water, and when hot water is required again for a while cold water is discharged, which had the problem that it was a discomfort for the user, however, this can be solved by providing the hot water supply device using this type ofheat storage device 10 with a heating function that is a characteristic of the present invention directly before the hot water supply side. This is because by doing so it is clear that hot water can be instantaneously supplied. - Furthermore, according to the hot water supply device using this type of
heat storage device 10 with a heating function, despite the fact that the device is compact with a superior heat exchange efficiency, heating by the heating means 14 is controlled by measuring the temperature and the like of theheat storage medium 13, which has the advantage that the temperature of the supplied hot water can be controlled to be in the required state. Also, the electrical power consumption of the heating means 14 can be maintained at the lowest necessary level. - The present invention is not limited to the structure explained in the embodiment described above, and it is unnecessary to say that the shape, structure, and so on of each part forming the hot water supply device may be changed and altered as appropriate.
- For example, in the embodiment described above, a
wash hand basin 5 was shown as an example, but the present invention is not limited to this, and it is obvious that the present invention may be applied to the supply of hot water to a domestic water heater, bathtub or kitchen hot water supply faucet, or to the supply of hot water to a supplementary heating device for a bathtub, or similar. - Also, in the embodiment described above, the
heat storage device 10 with a heating function that is a characteristic of the present invention was explained for the case where the device is provided close to the hot water supply faucet of thewash hand basin 5 which is the hot water supply side, but the present invention is not limited to this, and the device may be incorporated within thehot water heater 1 for example.
Claims (3)
1. A hot water supply device comprising a heat storage device with a heating function which is provided on a hot water supply pipe and which indirectly heats the water in the pipe using a heat storage medium to obtain hot water,
the heat storage device with a heating function comprising:
a piping portion connected to the hot water supply pipe;
a heat storage medium that exchanges heat with the piping portion; and
a casing disposed so as to enclose the heat storage medium and surround the piping portion,
the piping portion comprising an elastically deformable bellows-shaped portion that exchanges heat with the heat storage medium, and
the casing comprising heating means capable of heating the heat storage medium in accordance with temperature conditions thereof.
2. The hot water supply device according to claim 1 , further comprising:
a temperature sensor that measures a temperature of the heat storage medium; and
a temperature controller that controls heating by the heating means in accordance with temperature information from the temperature sensor, wherein the temperature controller controls the temperature of the heat storage medium to a predetermined set temperature.
3. The hot water supply device according to claim 2 , wherein a melting point of the heat storage medium is equal to or less than the set temperature.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-319631 | 2005-11-02 | ||
JP2005319631A JP2007127318A (en) | 2005-11-02 | 2005-11-02 | Water heater |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070108304A1 true US20070108304A1 (en) | 2007-05-17 |
Family
ID=38039753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/526,716 Abandoned US20070108304A1 (en) | 2005-11-02 | 2006-09-26 | Hot water supply device |
Country Status (3)
Country | Link |
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US (1) | US20070108304A1 (en) |
JP (1) | JP2007127318A (en) |
CA (1) | CA2560585A1 (en) |
Cited By (8)
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US20090223658A1 (en) * | 2008-03-05 | 2009-09-10 | Zenex Technologies Limited | Heating system |
US20110272132A1 (en) * | 2010-05-05 | 2011-11-10 | Gerdes Ohg | Arrangement and method for heating drinking water for one consumption point or tapping point |
CN102538050A (en) * | 2010-11-10 | 2012-07-04 | 丹福斯有限公司 | Heating system with sensor accelerator |
CN107560181A (en) * | 2017-09-29 | 2018-01-09 | 杨建强 | A kind of self-loopa heating boiler system |
CN107781891A (en) * | 2017-09-29 | 2018-03-09 | 杨建强 | A kind of self-circulating energy-saving heating system |
CN108800587A (en) * | 2017-05-05 | 2018-11-13 | 艾欧史密斯(中国)热水器有限公司 | Water heater |
CN109764541A (en) * | 2019-01-09 | 2019-05-17 | 青岛海尔空调器有限总公司 | A kind of energy resource system and its control method |
US20220252302A1 (en) * | 2021-02-08 | 2022-08-11 | Yu-Chen Lin | Smart electric heating device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101109115B1 (en) | 2009-05-22 | 2012-02-14 | 송주만 | A heat-keeping boiler using pcm |
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Also Published As
Publication number | Publication date |
---|---|
CA2560585A1 (en) | 2007-05-02 |
JP2007127318A (en) | 2007-05-24 |
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Legal Events
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AS | Assignment |
Owner name: NIPPON THERMOSTAT CO., LTD.,JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SEKI, EIJI;REEL/FRAME:018345/0513 Effective date: 20060912 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |