JP2009198074A - Hot water storage type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater for realizing high efficiency of an apparatus, without requiring to strengthen thermal insulation of a hot water supply pipe inside of an enclosing body, even if a heat radiating loss from a hot water storage tank is reduced. <P>SOLUTION: This hot water storage type water heater has a heating means 1 heating water, the hot water storage tank 2 storing hot water heated by the heating means 1, the hot water supply pipe 6 supplying the hot water to a hot water supply terminal, the enclosing body 10 storing the hot water storage tank 2 and the hot water supply pipe 6, a first thermal insulation material 18 arranged on a surface of the hot water storage tank 2 opposed to the hot water supply pipe 6, and a second thermal insulation material 19 arranged on a surface of the hot water storage tank 2 opposed to the enclosing body 10, and has the relationship that heat conductivity K1 and the thickness L1 of the first thermal insulation material 18 become L1/K1<L2/K2 to heat conductivity K2 and the thickness L2 of the second thermal insulation material 19. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot water storage type hot water supply apparatus that stores water heated by a heating means in a hot water storage tank and uses it for hot water supply, bath hot water filling and heat insulation, heating, drying, and the like.

  A conventional hot water storage type hot water supply apparatus of this type heats water to high temperature hot water by a heating means, stores it in a hot water storage tank covered with a heat insulating material, and uses it at a hot water supply terminal (see, for example, Patent Document 1). ). FIG. 10 shows a conventional hot water storage type hot water supply apparatus described in Patent Document 1. As shown in FIG.

  As shown in FIG. 10, the low temperature water supplied and stored in the hot water storage tank 2 from the water supply pipe 5 is heated by the water pump 9 disposed in the water inlet pipe 7 via the water inlet pipe 12. It is conveyed to. The hot water heated to the high temperature by the heating means 1 is supplied to the hot water storage tank 2 by the hot water piping 13 connected to the heating means 1 and the hot water outlet pipe 8 connected to the hot water piping 13 and leading the hot water to the hot water storage tank 2. It is stored from the top. When hot water is used at a hot water supply terminal 16 such as a shower, hot water supplied from the hot water supply pipe 5 connected to the hot water supply pipe 14 and hot water supplied from the hot water supply upper pipe 4 connected to the hot water storage tank 2 are used. Mixing water and hot water are mixed so that the mixing valve 3 becomes hot water having a temperature set by a remote controller (not shown) or the like, and the hot water having the set temperature is supplied to the hot water supply pipe 6 and the hot water supply pipe 6. It is supplied to the hot water supply terminal 16 via the hot water supply pipe 15 to be connected in order.

  The surface of the hot water storage tank 2 is covered with a heat insulating material 17 in order to suppress the amount of heat radiated from the hot water storage tank 2 to the atmosphere. The hot water storage tank 2, the mixing valve 3, the hot water supply upper pipe 4, the water supply pipe 5, the hot water supply pipe 6, the incoming water pipe 7, the hot water outlet pipe 8, the water pump 9, etc. It is formed as a hot water storage type hot water supply device by being surrounded by the exterior body 10b, the exterior body 10c on the back surface portion, the exterior body 10d on the top surface portion, and the exterior body 10e on the bottom surface portion.

As the heat insulating material 17, a heat insulating material with high heat insulating performance (low thermal conductivity) is used. Therefore, the amount of heat released from the hot water storage tank 2 is reduced, and the heat capacity of the hot water storage tank 2 can be maintained for a relatively long time. Further, as the amount of heat radiated from the hot water storage tank 2 is reduced, the amount of electric power required for heating and heat insulation is reduced. The material of the heat insulating material 17 is, for example, a foamed resin such as foamed polypropylene or foamed polystyrene, or a fiber material such as glass wool or glass fiber.
JP 2004-251521 A

  However, in the configuration in which the conventional hot water storage tank 2 is thermally insulated by the single heat insulating material 17, the following problems are encountered when the heat insulating performance of the heat insulating material 17 is improved to reduce the heat dissipation loss. In order to improve the heat insulation performance, if a material with high heat insulation performance (= low thermal conductivity) is used as the heat insulation material 17 or the thickness of the heat insulation material 17 is increased, the heat radiation from the hot water storage tank 2 is suppressed. Therefore, the atmospheric temperature of the space 11 between the heat insulating material 17 and the exterior bodies 10a, 10b, 10c, 10d, and 10e is lowered.

Moreover, since the atmospheric temperature of the space 11 is cooled from the outside air through the exterior bodies 10a, 10b, 10c, 10d, and 10e, the temperature is substantially equal to the outside air. When this hot water storage type hot water supply apparatus is installed under a sub-zero temperature condition, the hot water supply upper pipeline 4, the water supply pipeline 5, the hot water supply pipeline 6, the incoming water pipeline 7, and the hot water outlet pipeline 8 are exposed to an atmosphere at a temperature below zero. In order to prevent freezing of the water inside the pipe, a heat insulating material was required. In addition, when these pipes are covered with a heat insulating material, it is necessary to further enhance the heat insulating performance of the existing heat insulating material.

  In order to solve the above-described problems, the present invention provides a hot water storage type hot water supply that does not require the heat insulation reinforcement of the hot water supply pipe line inside the exterior body and realizes high efficiency of the equipment even if the heat loss from the hot water storage tank is reduced. An object is to provide an apparatus.

  In order to solve the conventional problems, the present invention provides a heating means for heating water, a hot water storage tank for storing hot water heated by the heating means, a hot water supply pipe for supplying hot water to a hot water supply terminal, and the hot water storage tank. An exterior body for housing the hot water supply pipe, a first heat insulating material provided on the surface of the hot water storage tank facing the hot water supply pipe, and a second heat insulation provided on the surface of the hot water storage tank facing the exterior body. The thermal conductivity K1 and thickness L1 of the first heat insulating material have a relationship of L1 / K1 <L2 / K2 with respect to the thermal conductivity K2 and thickness L2 of the second heat insulating material. It is a hot water storage type hot water supply apparatus characterized by having.

  Thereby, even if the heat insulation performance of the heat insulating material of the hot water storage tank is improved and the heat radiation loss is reduced, the ambient temperature of the pipe line inside the exterior body such as the hot water supply pipe line is not lowered. Therefore, since the temperature of the atmosphere of the pipe line inside the exterior body is equivalent to that of the conventional configuration, even if the hot water storage type hot water supply device is installed under the subzero temperature condition, the atmosphere does not drop below the subzero temperature, The water in the pipeline will not freeze even if the pipeline is exposed. Moreover, the heat insulation performance reinforcement of the existing heat insulating material becomes unnecessary.

  The present invention can provide a hot water storage type hot water supply apparatus that does not require the heat insulation reinforcement of the hot water supply pipe line inside the exterior body and realizes high efficiency of the equipment even if the heat dissipation loss from the hot water storage tank is reduced. .

  1st invention accommodates the heating means which heats water, the hot water storage tank which stores the hot water heated with the said heating means, the hot water supply pipe which supplies hot water to a hot water supply terminal, the said hot water storage tank, and the said hot water supply pipe A first heat insulating material provided on the surface of the hot water storage tank facing the hot water supply pipe, and a second heat insulating material provided on the surface of the hot water storage tank facing the outer packaging body, The thermal conductivity K1 and thickness L1 of one heat insulating material have a relationship of L1 / K1 <L2 / K2 with respect to the thermal conductivity K2 and thickness L2 of the second heat insulating material. This is a hot water supply device.

  Thereby, even if the heat insulation performance of the heat insulating material of the hot water storage tank is improved and the heat radiation loss is reduced, the ambient temperature of the pipe line inside the exterior body such as the hot water supply pipe line is not lowered. Therefore, since the temperature of the atmosphere of the pipe line inside the exterior body is equivalent to that of the conventional configuration, even if the hot water storage type hot water supply device is installed under the subzero temperature condition, the atmosphere does not drop below the subzero temperature, The water in the pipeline will not freeze even if the pipeline is exposed. Moreover, the heat insulation performance reinforcement of the existing heat insulating material becomes unnecessary.

  According to a second aspect of the invention, particularly in the hot water storage type hot water supply apparatus of the first aspect of the invention, the mixing valve for mixing the hot water and the water supply in the hot water storage tank, the water supply line for supplying water to the mixing valve, and the mixing valve The hot water supply line for supplying hot water to the hot water supply terminal is characterized by being arranged in a space in the front part of the space formed between the hot water storage tank and the exterior body. By consolidating pipes such as water supply pipes and outlet hot water pipes on the front, it is possible to expand the area for improving the performance of hot water storage tanks to areas other than the front where the hot water storage tanks are integrated. It is possible to realize a hot water storage type hot water supply device that further reduces heat loss, has high operational efficiency of equipment, and does not worry about running out of hot water.

According to a third aspect of the present invention, in the hot water storage type hot water supply apparatus according to any one of the first and second aspects of the invention, the second heat insulating material is a hot water storage type hot water supply apparatus that is a vacuum heat insulating material. Or increase the capacity of the hot water storage tank.

  According to a fourth aspect of the present invention, in the hot water storage hot water supply apparatus according to any one of the first to third aspects of the invention, a heat pump using carbon dioxide as a refrigerant is used as the heating means, and the high pressure side is operated in a state exceeding the critical pressure. By setting it as a thing, the hot water storage type hot-water supply apparatus can be utilized at high temperature, and the increase in the heat capacity of the hot water storage tank and the prevention of running out of hot water can be further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a perspective view from the upper surface of the hot water storage type hot water supply apparatus according to the first embodiment of the present invention, and FIG. 2 is a configuration diagram of the hot water storage type hot water supply apparatus according to the present embodiment.

  1 and 2, the heating means 1 is a heating heat source for heating the water stored in the hot water storage tank 2 to a high temperature, and the mixing valve 3 is supplied from a water supply pipe 5 connected to a water supply pipe 14. The water supply is performed so that the low temperature water supply and the high temperature hot water supplied from the hot water supply upper pipe 4 connected to the hot water storage tank 2 become hot water set at a temperature set by a remote controller (not shown) or the like. Mixing hot water. The hot water at the set temperature is supplied to the hot water supply terminal 16 via the hot water supply pipe 6 and the hot water supply pipe 15 connected to the hot water supply pipe 6 in order. Similar to the conventional configuration of FIG. 10, the water supplied to the hot water storage tank 2 from the water supply pipe 5 and stored therein is conveyed to the heating means 1 via the water inlet pipe 12 by the water pump 9 of the water inlet pipe 7. Is done.

  The hot water heated to the high temperature by the heating means 1 is supplied to the hot water storage tank 2 by the hot water piping 13 connected to the heating means 1 and the hot water outlet pipe 8 connected to the hot water piping 13 and leading the hot water to the hot water storage tank 2. Store from the top. At this time, in the hot water storage tank 2, hot hot water is stored in the upper portion and low temperature water is stored in a stacked state in the lower portion. The hot water storage tank 2, the mixing valve 3, the hot water supply upper pipe 4, the water supply pipe 5, the hot water supply pipe 6, the incoming water pipe 7, the hot water outlet pipe 8, the water pump 9, etc. It is formed as a hot water storage type hot water supply device by being surrounded by the exterior body 10b, the exterior body 10c on the back surface portion, the exterior body 10d on the top surface portion, and the exterior body 10e on the bottom surface portion.

  The hot water storage tank 2 is covered with a first heat insulating material 18 and a second heat insulating material 19, and the first heat insulating material 18 faces the water supply pipe 5, the hot water supply pipe 6, the water inlet pipe 7, and the hot water outlet pipe 8. The second heat insulating material 19 is provided on the surface of the hot water storage tank 2 where the surface of the hot water storage tank 2 does not face the water supply pipe 5, the hot water supply pipe 6, the water inlet pipe 7, and the hot water outlet pipe 8. Here, the thermal conductivity K1 and the thickness L1 of the first heat insulating material 18 have a relationship of L1 / K1 <L2 / K2 with respect to the thermal conductivity K2 and the thickness L2 of the second heat insulating material 19. Furthermore, the hot water storage tank 2 is provided with a plurality of temperature sensors (not shown) for detecting the amount of hot water stored in the hot water storage tank in a stacked state in the hot water stacking hot water storage direction. The amount of hot water remaining in the hot water storage tank is calculated based on the temperatures detected by the plurality of temperature sensors, and when this value is less than a predetermined value set in advance, the heating means 1 is operated, Increase hot water storage.

  Here, the space 11ab is a space formed by the exterior body 10a on the front surface portion, the exterior body 10b on the side surface portion, the exterior body 10d on the top surface portion, the exterior body 10e on the bottom surface portion, and the first heat insulating material 18. Pipes such as a passage 5, a hot water supply pipe 6, a water inlet pipe 7, and a hot water outlet pipe 8 are provided. The space 11 bc is a space formed by the exterior body 10 b on the side surface, the exterior body 10 c on the back surface, the exterior body 10 d on the top surface, the exterior body 10 e on the bottom surface, and the second heat insulating material 19.

  Below, operation | movement and an effect | action of the hot water storage type hot-water supply apparatus by this Embodiment are demonstrated.

  Since the heat stored in the hot water storage tank 2 is radiated to the outside air through the atmosphere of the spaces 11ab and 11bc and the exterior bodies 10a, 10b, 10c, 10d, and 10e, the hot water temperature of the hot water storage tank 2 decreases with time. I will do it. Even in the configuration of the conventional hot water storage type hot water supply apparatus shown in FIG. 10, the heat of the hot water storage tank 2 is similarly applied to the heat insulating material 17 for the hot water storage tank, the atmosphere in the space 11, and the exterior bodies 10 a, 10 b, 10 c, 10 d, 10 e. To dissipate heat to the outside air.

  FIG. 3 is a diagram showing the temperature distribution of the heat dissipation path (hot water storage tank → atmosphere → outside air) in the present embodiment. The temperature distribution of the configuration of the present invention is changed from the temperature T_in of the hot water staying in the hot water storage tank 2 to T_1 by radiating heat to the atmosphere of the space 11ab, and becomes the outside air temperature T_out through the thermal resistance of the exterior body 10a at the front portion. Further, the temperature distribution of the atmosphere in the space 11bc is changed from the temperature T_in of the hot water staying in the hot water storage tank 2 to T_2 by radiating heat to the atmosphere of the space 11bc, and the outside air temperature via the thermal resistance of the exterior bodies 10b and 10c on the side portions. T_out. At this time, since the heat insulation performance (thermal resistance value) of the first heat insulating material 18 and the second heat insulating material 19 has a relationship of L1 / K1 <L2 / K2, the heat radiation heat flow from the first heat insulating material 18 to the outside air. The bundle is larger than the heat radiation heat flux of the second heat insulating material 19, and the temperatures T_1 and T_2 of the atmosphere in the spaces 11ab and 11bc are T_1> T_2.

  In this configuration, when the outside air temperature decreases to below freezing point, the temperature T_1 of the atmosphere in the space 11ab between the exterior bodies 10a and 10b and the hot water storage tank 2 is reduced to zero due to heat radiation from the hot water storage tank 2 and the first heat insulating material 18. Even if the hot water storage type hot water supply device is installed under a subzero temperature condition, the hot water supply upper pipeline 4, the water supply pipeline 5, the hot water supply pipeline 6, the incoming water pipeline 7, and the outgoing hot pipeline 8 are not provided. The water in the pipeline does not freeze when exposed.

  Furthermore, the amount of heat radiated from the hot hot water stored in the hot water storage tank 2 to the atmosphere via the hot water supply upper line 4 and the hot water supply line 8 is reduced due to the temperature rise of the atmosphere T_1. It is also possible to reduce the thickness of the heat insulating material that insulates the pipe line such as the pipe line 6. In addition, in the space 11bc formed by the second heat insulating material 19 and the exterior bodies 10b and 10c, there is no fear of freezing because there is no pipe, and the heat insulating performance (thermal resistance value) of the second heat insulating material 19 is improved. The amount of heat released from the hot water storage tank 2 can be further reduced.

  Moreover, as shown in FIG. 1, by consolidating pipes such as the water supply pipe 5, the hot water supply pipe 6, the incoming water pipe 7, and the hot water outlet 8 on the front surface, It becomes possible to expand the area (the area where the performance of the heat insulating material can be improved) other than the front surface where the pipes are consolidated. Therefore, the heat loss of the hot water storage tank 2 can be further reduced, the operation efficiency of the equipment is high, and a hot water storage type hot water supply device that does not worry about running out of hot water can be realized.

  As described above, in the present embodiment, the hot water supply pipe, the hot water storage tank, the mixing valve, the outer package surrounding the hot water supply pipe, the first heat insulating material 18 and the second heat insulating material satisfying L1 / K1 <L2 / K2. By providing the material 19, the atmospheric temperature T_1 of the first heat insulating material 18 and the outer space 11ab is T_1> T_2 with respect to the atmospheric temperature T_2 of the second heat insulating material 19 and the outer space 11bc. A decrease in the temperature of the atmosphere such as the road is suppressed. Therefore, even if the hot water storage type hot water supply apparatus is installed under the sub-zero temperature condition, the atmosphere does not fall below the sub-zero temperature, and the hot water supply upper pipe 4, the water supply pipe 5, the hot water supply pipe 6, the incoming water pipe 7, and the hot water outlet pipe Even if 8 is exposed, the water in the pipeline will not freeze.

In addition, since the amount of heat radiated from the hot water stored in the hot water storage tank 2 to the atmosphere via the hot water supply upper pipe 4 and the hot water supply pipe 8 is reduced due to the temperature rise of the atmosphere T_1, the hot water supply upper pipe 4, The material cost can be reduced by reducing the heat insulating material of the water supply pipe 5, the hot water supply pipe 6, the water inlet pipe 7 and the hot water outlet pipe 8. Moreover, about the 2nd heat insulating material 19, since it is possible to further improve the heat insulation performance (thermal resistance value) of the 2nd heat insulating material 19, and can further reduce the amount of heat radiation from the hot water storage tank 2, hot water storage The heat capacity of the hot water storage tank 2 is maintained by reducing the heat dissipation loss of the tank 2.

  Furthermore, the area of the second heat insulating material 19 of the hot water storage tank 2 (high performance of the heat insulating material) can be obtained by concentrating pipes such as the water supply pipe 5, the hot water supply pipe 6, the incoming water pipe 7, and the outgoing hot water pipe 8. The area that can be converted into a large area) can be expanded to other than the front where the pipes are consolidated, so the heat dissipation loss of the hot water storage tank 2 is further reduced, the operating efficiency of the equipment is high, and there is no worry of running out of hot water. At the same time as the hot water supply device, the amount of electric power necessary for heating water is reduced, and the efficiency of the device can be improved.

  FIG. 4 is another configuration diagram of the hot water storage type hot water supply apparatus of the present embodiment. In FIGS. 1 and 2, the boundary between the first heat insulating material 18 and the second heat insulating material 19 is cut in the vertical direction. As shown in FIG. 4, the first heat insulating material 18 is part of the space 11 bc where the hot water supply upper pipe 4, the water supply pipe 5, the hot water supply pipe 6, the water inlet pipe 7, and the hot water outlet pipe 8 are not arranged. Even if it is the structure extended to this, the reduction effect of the material cost of the heat insulating material of piping described in the said this Embodiment can be acquired.

  Further, by extending the first heat insulating material 18 to the space 11bc, it becomes possible to move the hot water supply upper pipe 4 and the water supply pipe 5 to the rear exterior body 10c as in the configuration of FIG. It is possible to improve and improve the heating or the piping space required when expanding the bath function. Even in this case, the material cost of the heat insulating material necessary for the piping can be reduced.

  Moreover, as a material of the 1st heat insulating material 18, foaming resin, such as a foaming polypropylene and a foaming polystyrene, or fiber materials, such as glass wool and glass fiber, are used, for example, Hot water supply upper pipe line 4, Water supply pipe line 5, Hot water supply A flexible sheet-like heat insulating material or the like is used as the heat insulating material for the pipe line 6, the water inlet pipe line 7, and the hot water outlet pipe line 8, but the vacuum heat insulating material is particularly used as the second heat insulating material 19. The following effects can be obtained. The heat conductivity of the vacuum heat insulating material that makes the inside of the outer bag of the heat insulating material vacuum (1 to 200 Pa) is that of the sheet-like heat insulating material that uses materials such as glass wool, glass fiber, polyurethane, polyethylene, etc. at atmospheric pressure inside the outer bag. Compared to thermal conductivity, it is 1/10 to 1/100.

  Therefore, in the case where the second heat insulating material 19 using the vacuum heat insulating material and the sheet-shaped second heat insulating material 19 are used, when the amount of heat released from the hot water storage tank 2 is the same, a sheet-shaped heat insulating material is necessary. The thickness is 10 to 100 times the thickness of the vacuum heat insulating material. Therefore, since the thickness of the second heat insulating material can be reduced by using the vacuum heat insulating material, the device can be made compact. Or when it is set as the same apparatus size, since the hot water storage tank 2 can be enlarged and the amount of remaining hot water of the hot water storage tank 2 becomes difficult to reduce, the hot water outage state which cannot supply hot water can be avoided.

  FIG. 6 is another configuration diagram of the hot water storage type hot water supply apparatus of the present embodiment. A vacuum heat insulating material is used as the second heat insulating material 19 and the hot water storage tank 2 is covered with a plurality of second heat insulating materials. If the outer bag holding the vacuum inside the vacuum heat insulating material breaks due to some kind of damage, the heat insulating performance is lowered and the heat dissipation loss from the hot water storage tank 2 is increased. By making it into multiple here, even if one part breaks a bag, since the heat insulation of the remaining vacuum heat insulating material is hold | maintained, the risk at the time of bag breakage can be avoided.

  In FIG. 1, when the second heat insulating material 19 is a vacuum heat insulating material, piping such as the hot water supply upper pipe 4, the water supply pipe 5, the hot water supply pipe 6, the incoming water pipe 7, and the outlet hot water pipe 8 is connected to the front surface. Since these pipes do not come into contact with the vacuum heat insulating material, it is possible not only to avoid the risk that the vacuum heat insulating material breaks when the device is assembled, but also to improve the device assemblability.

FIG. 7 is another perspective view from the upper surface of the hot water storage type hot water supply apparatus according to the present embodiment.
By using a vacuum heat insulating material as 9 in particular, the following effects can be obtained. The heat conductivity of the vacuum heat insulating material that makes the inside of the outer bag of the heat insulating material vacuum (1 to 200 Pa) is that of the sheet-like heat insulating material using materials such as glass wool, glass fiber, polyurethane, polyethylene, etc. at the atmospheric pressure inside the outer bag. Compared to thermal conductivity, it is 1/10 to 1/100. Therefore, in the case where the second heat insulating material 19 using the vacuum heat insulating material and the sheet-shaped second heat insulating material 19 are used, when the amount of heat released from the hot water storage tank 2 is the same, the sheet-shaped heat insulating material is necessary. The thickness is 10 to 100 times the thickness of the vacuum heat insulating material.

  Accordingly, the second heat insulating material 19 can be made thin by using a vacuum heat insulating material, and further, such as the hot water supply upper pipe 4, the water supply pipe 5, the hot water supply pipe 6, the incoming water pipe 7, and the outgoing hot water pipe 8. By concentrating the pipes on the front surface, the second heat insulating material can be expanded to the narrowest position between the hot water storage tank 2 and the exterior body 10b on the side surface, and the device can be made compact. Further, when the side surface exterior body 10b or the back surface exterior body 10c is substantially in contact with the second heat insulating material 19, the bottom area of the apparatus is minimized, and the use of a vacuum heat insulating material maximizes the compactness. It can be demonstrated.

  FIG. 8 is another perspective view from the upper surface of the hot water storage type hot water supply apparatus according to the present embodiment. In FIG. 8, the hot water storage tanks 2a and 2b are provided. Also in the hot water storage type hot water supply apparatus having a plurality of hot water storage tanks, by arranging the first heat insulating material 18 and the second heat insulating material 19, the hot water supply upper pipe 4, the water supply pipe 5, the hot water supply pipe 6, and the water intake pipe. Reduction of material costs by reducing heat insulating material of the passage 7 and the hot water outlet pipe 8 and a hot water storage type hot water supply device that does not worry about running out of hot water, and at the same time, the amount of electric power necessary for heating water is reduced. The efficiency of the equipment can be improved.

  In the present embodiment, the piping in the apparatus space is the hot water supply upper pipeline 4, the water supply pipeline 5, the hot water supply pipeline 6, the incoming water pipeline 7, and the hot water outlet pipeline 8, but is not limited thereto. This includes bath piping when a bath is connected and heating piping when a heating device is connected.

  Moreover, in the said embodiment, the system which uses a heater as the heating means 1 and heats the water supply stored in the hot water storage tank 2 directly may be used.

  Furthermore, a heat pump as shown in FIG. 9 is used as the heating means 1, and the compressor 21, the hot water heat exchanger 22, the decompression means 23, and the air heat exchanger 24 are sequentially connected in a ring shape with a refrigerant circuit 25. May be. The water in the hot water storage tank 2 is heated to a high temperature by the hot water supply heat exchanger 22 and then returned to the upper part of the hot water storage tank 2 again. The refrigeration cycle preferably uses carbon dioxide as a refrigerant and is operated at a pressure exceeding the critical pressure. By using carbon dioxide as a refrigerant, the hot water storage type hot water supply device can be used at a high temperature, and the heat capacity of the hot water storage tank 2 can be increased and the hot water prevention property can be further improved.

  The hot water storage type hot water supply apparatus according to the present invention leads to prevention of problems such as an increase in power consumption due to heat dissipation loss of the hot water storage tank, a decrease in the amount usable as hot water, and in addition to hot water, bath, heating, or It can also be used for applications such as waste heat source hot water storage hot water supply devices.

The perspective view from the upper side of the hot water storage type hot water supply apparatus in Embodiment 1 of this invention Configuration diagram of the hot water storage system (A) Temperature distribution diagram of the hot water storage type hot water supply device (first heat insulating material side) (b) Temperature distribution diagram of the hot water storage type hot water supply device (second heat insulating material side) Configuration diagram of other hot water storage type hot water supply devices Configuration diagram of other hot water storage type hot water supply devices Configuration diagram of other hot water storage type hot water supply devices Perspective view from above of other hot water storage system Perspective view from above of other hot water storage system Configuration diagram of other hot water storage type hot water supply devices Configuration diagram of a conventional hot water storage hot water supply system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating means 2 Hot water storage tank 3 Mixing valve 5 Water supply line 6 Hot water supply line 10a Exterior body 10b Exterior body 10c Exterior body 10d Exterior body 18 First heat insulating material 19 Second heat insulating material

Claims (4)

A heating means for heating water, a hot water storage tank for storing hot water heated by the heating means, a hot water supply pipe for supplying hot water to a hot water supply terminal, the hot water storage tank, an exterior body for housing the hot water supply pipe, A first heat insulating material provided on the surface of the hot water storage tank facing the hot water supply pipe; and a second heat insulating material provided on the surface of the hot water storage tank facing the exterior body, and heat conduction of the first heat insulating material. The rate K1 and the thickness L1 have a relationship of L1 / K1 <L2 / K2 with respect to the thermal conductivity K2 and the thickness L2 of the second heat insulating material. A mixing valve for mixing hot water and hot water in a hot water storage tank, a water supply pipe for supplying water to the mixing valve, a hot water supply pipe for supplying hot water mixed by the mixing valve to a hot water supply terminal, the hot water storage tank and the exterior The hot water storage type hot water supply apparatus according to claim 1, wherein the hot water storage type hot water supply apparatus is arranged in a space in a front portion of a space formed between the body and the body. The hot water storage type hot water supply apparatus according to claim 1 or 2, wherein the second heat insulating material is a vacuum heat insulating material. The heating means is a heat pump unit in which a compressor, a hot water supply heat exchanger, a decompression means, and an air heat exchanger are connected by a refrigerant circuit, using carbon dioxide as a refrigerant, and operating on a high pressure side in a state exceeding the supercritical state. The hot water storage type hot water supply device according to any one of claims 1 to 3.

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