JP5928007B2 - Thermal insulation for hot water storage tank and hot water storage type water heater - Google Patents

Description

  The present invention relates to a heat insulating material for a hot water storage tank and a hot water storage type water heater provided with the same.

  Hot water storage water heaters configured to store hot water obtained by heating water with heating means such as a heat pump unit in a hot water storage tank, take out hot water from this hot water storage tank when necessary, and supply it to a hot water supply terminal are widely used. It is used. In order to suppress heat dissipation from the hot water storage tank, a heat insulating material is disposed around the hot water storage tank. As the heat insulating material, for example, a foamed heat insulating material such as expanded polystyrene has been used conventionally, but in order to further improve the heat insulation performance of the hot water storage tank, a technique using a vacuum heat insulating material with higher heat insulating performance has been proposed. Yes. The vacuum insulation material is a vacuum state in which a core material (core material) formed by processing foam, powder, fiber, etc. into a sheet is wrapped in a gas barrier film (plastic film, plastic metal laminate film, etc.). And the peripheral part of the gas barrier film is heat sealed and sealed. The vacuum heat insulating material has an extremely high heat insulating performance, but when the gas barrier film is perforated and the internal vacuum state is impaired, the heat insulating performance is greatly deteriorated. Thus, since a vacuum heat insulating material is easy to be damaged, there exists a problem that handling at the time of manufacture, conveyance, the assembly to a hot water storage tank unit, etc. is difficult.

  In order to solve this problem, a technique has been proposed in which a vacuum heat insulating material is integrally formed with a foamable heat insulating material, and the vacuum heat insulating material is embedded in the foamable heat insulating material (see, for example, Patent Document 1).

  Patent Document 2 discloses a hot water storage type hot water heater in which a reheating heat exchanger is embedded in a foamable heat insulating material of a hot water storage tank in order to reduce the number of parts.

JP 2007-131329 A JP 2011-94925 A

  In recent years, hot water storage-type water heaters have become more multifunctional, and there is a tendency that the number of parts increases and the piping configuration becomes complicated. For this reason, the hot water storage tank unit is increasing in size, increasing the number of assembly steps, and increasing the possibility of erroneous assembly. In particular, the piping in the hot water storage tank unit needs to be wrapped with a heat insulating cylinder having heat insulation in order to prevent heat release. Therefore, as the number of pipes increases, the number of heat insulating cylinders increases and the number of parts further increases. is there.

  The present invention has been made in order to solve the above-described problems, and provides a hot water storage tank heat insulating material having high heat insulating performance and capable of reducing the number of parts, and a hot water storage type water heater provided with the same. With the goal.

The hot water storage tank heat insulating material according to the present invention is a molded heat insulating material formed in a shape covering a hot water storage tank for storing hot water, a vacuum heat insulating material embedded in the molded heat insulating material, and embedded in the molded heat insulating material, A pipe through which hot water can circulate , and the pipe is embedded in the molded insulation with the connection port exposed from the molded insulation, and a plurality of pipes are embedded in the molded insulation. all connection ports of all pipes buried in the, so as to face the predetermined side surface of the outer case that houses the hot water storage tank, a shall be exposed from the molded insulation.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the hot water storage tank heat insulating material which has high heat insulation performance and can aim at reduction of a number of parts, and the hot water storage type water heater provided with the same.

It is a block diagram which shows the hot water storage type water heater of Embodiment 1 of this invention. It is a disassembled perspective view which shows the hot water storage tank with which the hot water storage type water heater of Embodiment 1 of this invention is provided, and the heat insulating material which covers this. It is a perspective view which shows the shaping | molding heat insulating material which covers the trunk | drum of the hot water storage tank in Embodiment 1 of this invention. It is a front view of the hot water storage tank and heat insulating material in Embodiment 2 of this invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a top view of the hot water storage tank and heat insulating material in Embodiment 3 of this invention. It is a front view of the hot water storage tank and heat insulating material in Embodiment 4 of this invention. It is a top view of the hot water storage tank and heat insulating material in Embodiment 5 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram illustrating a hot water storage type water heater according to Embodiment 1 of the present invention. As shown in FIG. 1, the hot water storage type water heater of the present embodiment includes a hot water storage tank unit 60 and a heating means 4. The hot water storage tank unit 60 includes a substantially rectangular parallelepiped outer case, and the outer case includes a bottom plate 9, an outer case side plate 10, an outer case top plate 11, and the like. In the outer case, a substantially cylindrical hot water storage tank 1 and various devices such as pumps, valves, piping, and a reheating heat exchanger are accommodated. The hot water storage tank 1 is covered with a heat insulating material to be described later in order to prevent heat dissipation to the atmosphere. A plurality of tank unit legs 12 are installed below the outer case, and the hot water storage tank unit 60 is supported and fixed to the ground or a pedestal by these tank unit legs 12.

  As the heating means 4, for example, a heat pump type heating means that can absorb the heat of the outside air and boil hot water using a refrigeration cycle is preferably used. The heating means 4 and the hot water storage tank unit 60 are connected to each other through a water inlet pipe 3, a hot water outlet pipe 5, and an electrical wiring (not shown). In addition, the heating means in the hot water storage type hot water heater of the present invention is not limited to such a configuration, and for example, a heating means such as an electric heater may be arranged in the hot water storage tank 1.

  The hot water storage tank unit 60 is further connected to a water supply pipe 2, a bath hot water supply pipe 6, and a hot water supply pipe 7. Low-temperature water supplied from an external water source such as water supply passes through the water supply pipe 2 and is supplied into the hot water storage tank 1. The water stored in the hot water storage tank 1 is conveyed to the heating means 4 through the water intake pipe 3. The low temperature water conveyed to the heating means 4 is heated by the heating means 4 and becomes high temperature water. This high-temperature water is conveyed to the hot water storage tank unit 60 through the hot water discharge pipe 5, flows into the upper part of the hot water storage tank 1, and is stored. The hot water storage tank unit 60 is provided with a mixing valve that adjusts the temperature by mixing high temperature water taken out from the hot water storage tank 1 and low temperature water supplied from the water supply pipe 2. The hot water whose temperature is adjusted by the mixing valve is supplied to the bathtub 40 through the bath hot water supply pipe 6, or is supplied to the hot water supply terminal such as a shower, a kitchen, and a faucet through the hot water supply pipe 7.

  FIG. 2 is an exploded perspective view showing a hot water storage tank 1 and a heat insulating material covering the hot water storage tank 1 included in the hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention. As shown in FIG. 2, the hot water storage tank 1 is covered with molded heat insulating materials 14, 15, 16, and 17 formed into a predetermined shape in order to prevent heat dissipation to the atmosphere. These molded heat insulating materials 14, 15, 16, and 17 are desirably foamed molded heat insulating materials formed of a foam material such as foamed polystyrene. The hot water storage tank 1 is supported on the bottom plate 9 by a plurality of tank legs 8. A plurality of tank unit legs 12 are installed below the bottom plate 9.

  The molded heat insulating material 14 has a substantially bowl-like shape covering the upper part of the hot water storage tank 1. The molded heat insulating material 15 has a substantially bowl-like shape covering the lower part of the hot water storage tank 1. Each of the molded heat insulating materials 16 and 17 has a substantially semi-cylindrical shape, and the body portion (side surface portion) of the hot water storage tank 1 is covered over almost the entire circumference by combining both of them. The molded heat insulating material 16 is disposed on the front side of the hot water storage tank unit 60, and the molded heat insulating material 17 is disposed on the rear surface side of the hot water storage tank unit 60. As will be described later, a pipe 30a is embedded in the molded heat insulating material 16 and a concave portion 50 for pipe connection is formed, but these are not shown in FIG.

  FIG. 3 is a perspective view showing molded heat insulating materials 16 and 17 covering the trunk portion of hot water storage tank 1 according to Embodiment 1 of the present invention. As shown in FIG. 3, vacuum heat insulating materials 13 are embedded (built in) in the molded heat insulating materials 16 and 17, respectively. The vacuum heat insulating material 13 is integrated with the molded heat insulating materials 16 and 17, and the front surface or most of the surface of the vacuum heat insulating material 13 is covered with the molded heat insulating materials 16 and 17. The vacuum heat insulating material 13 wraps, for example, a core material (core material) formed by processing foam, powder, fiber, etc. into a sheet shape with a gas barrier film (plastic film, plastic metal laminate film, etc.), and the inside is vacuumed. It is set as the state (depressurized state), and it has the structure sealed by heat-welding the peripheral part of a gas barrier film. For this reason, the vacuum heat insulating material 13 has a configuration in which a welded film portion formed by thermally welding a gas barrier film protrudes from an outer peripheral portion of a main body portion containing a core material.

  The vacuum heat insulating material 13 is embedded in the molded heat insulating materials 16 and 17 in a state of a curved surface (substantially semi-cylindrical) along the cylindrical surface of the molded heat insulating materials 16 and 17. In the illustrated configuration, one vacuum heat insulating material 13 is built in each of the molded heat insulating materials 16 and 17, but a plurality of vacuum heat insulating materials 13 may be built in one molded heat insulating material 16 and 17. In that case, a plurality of vacuum heat insulating materials 13 may be stacked, or a plurality of vacuum heat insulating materials 13 may be arranged in divided regions. As a method of manufacturing the molded heat insulating materials 16 and 17 in which the vacuum heat insulating material 13 is embedded, the vacuum heat insulating material 13 is arranged in a mold for forming the molded heat insulating materials 16 and 17 so as to surround the vacuum heat insulating material 13. The molded heat insulating materials 16 and 17 can be easily manufactured by integrally molding, that is, by insert molding.

  In general, the heat insulating performance of the vacuum heat insulating material 13 is significantly reduced when a hole is opened in the gas barrier film and the internal vacuum state is impaired. For this reason, when manufacturing, transporting, and assembling, it is necessary to pay close attention so as not to damage the gas barrier film and make a hole, and handling is difficult. On the other hand, in this embodiment, since the vacuum heat insulating material 13 is built in the molded heat insulating materials 16 and 17, the vacuum heat insulating material 13 is protected by the molded heat insulating materials 16 and 17. , 17 during transportation or assembly of the hot water storage tank unit 60, it is possible to reliably prevent the gas barrier film of the vacuum heat insulating material 13 from being damaged by mistake and being pierced. Moreover, the assembly work of the hot water storage tank unit 60 is also facilitated.

  In the molded heat insulating material 16 disposed on the front surface side of the hot water storage tank unit 60, a pipe 30a through which hot water can flow is embedded. The pipe 30a is preferably embedded in the molded heat insulating material 16 by being placed together with the vacuum heat insulating material 13 in a mold for forming the molded heat insulating material 16 and performing insert molding. According to the insert molding, the pipe 30a can be easily embedded in the molded heat insulating material 16. The hot water passing through the pipe 30a is, for example, high temperature water sent from the heating means 4 and flowing into the hot water storage tank 1, high temperature water taken out from the hot water storage tank 1, and low temperature flowing into the hot water storage tank 1 from the water supply pipe 2. It may be anything such as water, medium temperature water flowing into the hot water storage tank 1 from the reheating heat exchanger. In the present embodiment, parts such as piping are not embedded in the molded heat insulating material 17 disposed on the rear surface side of the hot water storage tank unit 60.

  In the present embodiment, the pipe 30a extending linearly along the vertical direction is embedded in the molded heat insulating material 16, but a pipe having a bent or curved shape is embedded in the molded heat insulating material 16. Also good.

  Connection ports 33 provided at both ends of the pipe 30 a are exposed outside the molded heat insulating material 16. When the hot water storage tank unit 60 is assembled, other parts such as a predetermined pipe are connected to the connection port 33 of the pipe 30a to form a hot water circuit. Since the connection port 33 of the pipe 30 a is exposed outside the molded heat insulating material 16, the pipe connection between the connection port 33 and other components can be easily connected when the hot water storage tank unit 60 is assembled. In addition, it is possible to easily confirm water leakage from the connection portion between the connection port 33 and other parts after assembly.

  In the present embodiment, since the pipe 30a is embedded in the molded heat insulating material 16, the installation space for the pipe 30a can be reduced compared to the case where the pipe 30a is provided outside the molded heat insulating material 16 as in the prior art. This contributes to downsizing of the tank unit 60.

  Moreover, in the structure which provides the piping 30a outside the shaping | molding heat insulating material 16 like the past, there existed a case where a hollow and a groove | channel were provided in the shaping | molding heat insulating material 16 in the position where the shaping | molding heat insulation 16 and the piping 30a interfere. Since the thickness of the molded heat insulating material 16 is reduced at the locations where the depressions and grooves are formed, the heat insulating property is lowered. On the other hand, in the present embodiment, it is not necessary to form such depressions and grooves in the molded heat insulating material 16 and the thickness of the molded heat insulating material 16 can be sufficiently secured, so that a decrease in heat insulating property can be avoided. it can.

  Moreover, since the piping 30a is covered with the shaping | molding heat insulating material 16 by having embed | buried the piping 30a in the shaping | molding heat insulating material 16, the thermal radiation from the piping 30a can be prevented. For this reason, it is not necessary to provide a heat insulating cylinder (cylindrical member made of a heat insulating material) that covers the outer periphery of the pipe 30a, and the number of parts can be reduced.

  Moreover, in this Embodiment, the connection port 33 of the piping 30a is exposed in the recessed part 50 for piping connection formed in the shaping | molding heat insulating material 16. As shown in FIG. As a result, a space is formed around the connection port 33, so that the pipe connection between the connection port 33 and other components can be performed more easily, and the connection portion between the connection port 33 and other components after assembly. It is very easy to confirm water leakage from the water.

  In addition, when providing the recessed part 50 for pipe connection in the area | region where the vacuum heat insulating material 13 is embed | buried, it is desirable to make the depth of the recessed part 50 into the depth which does not reach the vacuum heat insulating material 13. FIG. Thereby, exposure of the vacuum heat insulating material 13 can be prevented and the vacuum heat insulating material 13 can be protected more reliably. Moreover, it is desirable that the size of the recess 50 is set so that the connection port 33 and other components can be easily connected.

  In the configuration shown in the drawing, a concave portion 50 for pipe connection is provided on the outer surface side (opposite side of the hot water storage tank 1) of the molded heat insulating material 16, but when the hot water storage tank 1 and the pipe 30a are connected, the molded heat insulating material is provided. A recess 50 may be provided on the inner surface side of 16 (the side in contact with the hot water storage tank 1).

  Alternatively, a lid made of a heat insulating material shaped to fill the recess 50 may be provided, and after the connection port 33 and other parts are connected, the lid 50 may be pressed into the recess 50 to close the recess 50. Thereby, heat insulation performance can further be improved.

  Further, the pipe 30 a may be fixed to the molded heat insulating material 16, but may be installed to be displaceable with respect to the molded heat insulating material 16. That is, the pipe 30 a may be movable in the axial direction with respect to the molded heat insulating material 16, or the pipe 30 a may be rotatable with respect to the molded heat insulating material 16. Thereby, when connecting the connection port 33 of the pipe 30a and other components, the position and orientation of the pipe 30a can be finely adjusted, so that the connection work can be easily performed. As a method of embedding the pipe 30a so that the pipe 30a can be displaced with respect to the molded heat insulating material 16, for example, when insert molding is performed, insert molding is performed in a state where a heat insulating cylinder is attached to the outer periphery of the pipe 30a. Just do it. Thereby, since the beads as the material of the molded heat insulating material 16 do not flow between the heat insulating cylinder and the pipe 30a, the pipe 30a can be displaced in the axial direction and the rotational direction even after molding.

Embodiment 2. FIG.
Next, the second embodiment of the present invention will be described with reference to FIG. 4 to FIG. 6. The description will focus on the differences from the first embodiment described above, and the same or corresponding parts will be denoted by the same reference numerals. The description is omitted.

  FIG. 4 is a front view of hot water storage tank 1 and heat insulating material in Embodiment 2 of the present invention. 5 is a cross-sectional view taken along the line AA in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line BB in FIG. 5 and 6, the hot water storage tank 1 is not a cross section but an external appearance.

  As shown in these drawings, in the present embodiment, a plurality of pipes 30b, 30c, 30d and 30e and a reheating heat exchanger 41 are formed in the molded heat insulating material 16 located on the front side of the hot water storage tank unit 60. And are buried. In the present embodiment, the reheating heat exchanger 41 is embedded in the molded heat insulating material 16, so that the reheating heat exchanger 41 is compared with the case where the reheating heat exchanger 41 is provided outside the formed heat insulating material 16. Since the installation space of the vessel 41 can be reduced, the hot water storage tank unit 60 can be reduced in size. In addition, since a part for attaching the reheating heat exchanger 41 is not necessary, the number of parts can be reduced. In the present invention, in addition to the reheating heat exchanger 41, an apparatus for circulating hot water (for example, a microbubble generator for generating microbubbles such as microbubbles) may be embedded in the molded heat insulating material 16. Good.

  As shown in FIG. 4, the connection ports 33 provided in the pipes 30 b, 30 c, and 30 d embedded in the molded heat insulating material 16 are exposed in the concave portions 50 for connecting pipes formed in the molded heat insulating material 16. The pipe 30b and the pipe 30c are located on the same straight line. The connection port 33 at the lower end of the pipe 30 b and the connection port 33 at the upper end of the pipe 30 c are exposed in the common recess 50. Further, the reheating heat exchanger 41 is provided with a port through which hot water enters and exits, and the port is disposed so as to be exposed in a concave portion 50 for pipe connection formed in the molded heat insulating material 16. In the illustrated configuration, when the hot water storage tank unit 60 is assembled, a connection pipe 30f passing through the outside of the molded heat insulating material 16 is prepared. 33, and the other end of the connection pipe 30f is connected to the port of the reheating heat exchanger 41, so that the lines 30b and 30c and the reheating heat exchanger 41 are connected via the connection pipe 30f. It is configured to be able to.

  As shown in FIG. 5, the connection ports 34 provided at both ends of the pipe 30 e embedded in the molded heat insulating material 16 are bent at right angles to the main body of the pipe 30 e, respectively. By projecting to the outer surface side (the side opposite to the hot water storage tank 1), it is exposed outside the molded heat insulating material 16. At the time of assembling the hot water storage tank unit 60, the connection pipe 30 g is prepared, and the connection pipe 30 g is connected to the connection port 34 by the connecting member 31.

  In the present embodiment, all of the connection ports 33 of the pipes 30b, 30c and 30d and the connection port 34 of the pipe 30e face the outer case side plate 10 on the front surface side of the hot water storage tank unit 60 from the molded heat insulating material 16. Exposed. Thus, the connection ports 33 and 34 of the plurality of pipes 30b, 30c, 30d, and 30e are arranged so as to face the predetermined side surface (front surface in the present embodiment) of the outer case and be exposed from the molded heat insulating material 16. Accordingly, when the hot water storage tank unit 60 is assembled, the pipes 33 and 34 can be easily connected from the predetermined side surface (front surface in the present embodiment) side, and the assembly can be facilitated.

  As shown in FIG. 6, the vacuum heat insulating material 13 embedded in the molded heat insulating material 16 and the pipes 30 b, 30 c, 30 d, 30 e are not in contact with each other and are separated by the molded heat insulating material 16. For this reason, it is possible to reliably prevent the vacuum heat insulating material 13 and the pipes 30b, 30c, 30d, 30e from contacting each other and interfering with each other during molding, transportation, and assembly. Can be reliably suppressed. The thickness of the molded heat insulating material 16 at the part separating the vacuum heat insulating material 13 and the pipes 30b, 30c, 30d, and 30e is preferably about several mm to several tens of mm. By separating the vacuum heat insulating material 13 from the pipes 30b, 30c, 30d, and 30e by the molded heat insulating material 16 having such a thickness, the vacuum heat insulating material 13 can be more reliably protected. In the present embodiment, the vacuum heat insulating material 13 and the reheating heat exchanger 41 are also separated by the molded heat insulating material 16. For this reason, it can prevent reliably that the vacuum heat insulating material 13 and the reheating heat exchanger 41 contact, and mutually interfere, and can suppress the failure | damage of the vacuum heat insulating material 13 reliably.

  As shown in FIG. 6, the piping 30 c is disposed inside the molded heat insulating material 16 and on the inner side (the hot water storage tank 1 side) than the vacuum heat insulating material 13. That is, the pipe 30 c is located between the hot water storage tank 1 and the vacuum heat insulating material 13. Although not shown, the same applies to the pipe 30b. The high-temperature pipe through which the high-temperature water in the hot water storage tank unit 60 passes is preferably arranged inside the vacuum heat insulating material 13 (between the hot water storage tank 1 and the vacuum heat insulating material 13), like the pipes 30b and 30c. By disposing the high-temperature pipe inside the highly heat-insulating vacuum heat insulating material 13, heat radiation from the high-temperature pipe to the outside can be more effectively suppressed, thereby reducing heat dissipation loss and improving energy efficiency. Can do. The high temperature water here is, for example, high temperature water heated by the heating means 4 and flowing into the upper part of the hot water storage tank 1 or high temperature water taken out from the hot water storage tank 1.

  On the other hand, the pipes 30 d and 30 e are arranged outside the vacuum heat insulating material 13 (on the opposite side to the hot water storage tank 1) in the molded heat insulating material 16. That is, the pipes 30 d and 30 e are located on the opposite side to the hot water storage tank 1 through the vacuum heat insulating material 13. In the hot water storage tank unit 60, a low temperature pipe through which water having a temperature lower than the high temperature water (for example, water supplied from the water supply pipe 2, medium hot water returning from the reheating heat exchanger 41 to the hot water storage tank 1) passes is a pipe. It is preferable to arrange | position outside the vacuum heat insulating material 13 like 30d and 30e (on the opposite side to the hot water storage tank 1 through the vacuum heat insulating material 13). Thus, by disposing the highly heat-insulating vacuum heat insulating material 13 between the hot water storage tank 1 and the high temperature pipes (pipes 30b, 30c) and the low temperature pipes (pipes 30d, 30e), Since heat of high-temperature water or high-temperature water passing through a high-temperature pipe can be effectively suppressed from being taken away by low-temperature water passing through a low-temperature pipe, heat dissipation loss can be reduced and energy efficiency can be improved.

  In the present embodiment, piping 30b and 30c located between the hot water storage tank 1 and the vacuum heat insulating material 13 and the hot water storage tank 1 are disposed on the opposite side of the hot water storage tank 1 in the molded heat insulating material 16. However, in the present invention, all the pipes embedded in the molded heat insulating material may be disposed between the hot water storage tank 1 and the vacuum heat insulating material 13, or You may arrange | position all the piping embed | buried in a shaping | molding heat insulating material on the opposite side to the hot water storage tank 1 via the vacuum heat insulating material 13. FIG.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described with reference to FIG. 7. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Omitted. FIG. 7 is a top view of hot water storage tank 1 and heat insulating material in Embodiment 3 of the present invention.

  As shown in FIG. 7, in the present embodiment, a plurality of pipes 30 h and 30 i are embedded in the molded heat insulating material 16 located on the front side of the hot water storage tank unit 60. The connection ports 34 of the pipes 30 h and 30 i protrude to the outer surface side (the side opposite to the hot water storage tank 1) of the molded heat insulating material 16 and are exposed to the outside of the molded heat insulating material 16. The center line of the connection port 34 of the pipe 30h and the center line of the connection port 34 of the pipe 30i are parallel to each other. At the time of assembling the hot water storage tank unit 60, the connection pipe 30j is prepared, one end of the connection pipe 30j is connected to the connection port 34 of the pipe 30h, and the other end of the connection pipe 30j is connected to the connection port 34 of the pipe 30i. The pipe 30h and the pipe 30i can be connected via the connection pipe 30j. In this way, by exposing the connection ports 34 of the plurality of pipes 30h and 30i embedded in the molded heat insulating material 16 from the molded heat insulating material 16 so that their center lines are parallel to each other, Parts such as the connection pipe 30j to be connected at the time of assembly can be easily attached.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described with reference to FIG. 8. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be denoted by the same reference numerals. Omitted. FIG. 8 is a front view of hot water storage tank 1 and heat insulating material in Embodiment 4 of the present invention.

  As shown in FIG. 8, in the present embodiment, a pipe 30 k is embedded in the molded heat insulating material 16 located on the front surface side of the hot water storage tank unit 60. The connection ports 33 provided at both ends of the pipe 30k are exposed in the pipe connection recesses 50 formed in the molded heat insulating material 16. Further, the molded heat insulating material 16 is further formed with a recess 51 that exposes an intermediate portion of the pipe 30k. An antifreeze heater 32 is attached to the portion of the pipe 30 k exposed at the recess 51. By energizing the antifreezing heater 32 in winter when the water in the pipe 30k may freeze, the pipe 30k can be prevented from freezing. Thus, by forming the recessed part 51 which exposes the middle part of the pipe 30k in the molded heat insulating material 16, the freezing prevention heater 32 is provided in the pipe 30k embedded in the molded heat insulating material 16 when the hot water storage tank unit 60 is assembled. Etc. can easily be attached. Examples of the accessory parts include a temperature sensor and a flow rate sensor in addition to the freeze prevention heater 32.

Embodiment 5 FIG.
Next, a fifth embodiment of the present invention will be described with reference to FIG. 9. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Omitted. FIG. 9 is a top view of hot water storage tank 1 and heat insulating material according to Embodiment 5 of the present invention.

  As shown in FIG. 9, in this Embodiment, the some piping 30m, 30n, 30p is embed | buried in the shaping | molding heat insulating material 16 located in the front side of the hot water storage tank unit 60. As shown in FIG. The connection ports 34 of the pipes 30m, 30n, and 30p protrude to the outer surface side (the side opposite to the hot water storage tank 1) of the molded heat insulating material 16 and are exposed outside the molded heat insulating material 16. The connection ports 34 of the pipes 30m, 30n, and 30p protrude in the same predetermined direction (in the present embodiment, the forward direction of the hot water storage tank unit 60). In the protruding direction, the connection port 34 of the pipe 30m, the connection port 34 of the pipe 30n, and the connection port 34 of the pipe 30p are different from each other in the height of their tip portions. With such a configuration, the overall length of each of the pipes 30m, 30n, and 30p can be kept short, and the space in the hot water storage tank unit 60 can be effectively utilized.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Water supply piping 3 Intake piping 4 Heating means 5 Hot water supply piping 6 Bath hot water supply piping 7 Hot water supply piping 8 Tank leg 9 Bottom plate 10 Outer case side plate 11 Outer case top plate 12 Tank unit leg 13 Vacuum heat insulating materials 14, 15, 16, 17 Molding heat insulating material 30a, 30b, 30c, 30d, 30e, 30h, 30i, 30m, 30n, 30p Piping 30f, 30g, 30j Connecting piping 31 Connecting member 32 Antifreeze heater 33, 34 Connecting port 40 Bath 41 Heat for reheating Exchanger 50, 51 Recess 60 Hot water storage tank unit

Claims (13)

Molded heat insulating material molded into a shape that covers a hot water storage tank for storing hot water,
A vacuum heat insulating material embedded in the molded heat insulating material;
A pipe embedded in the molded heat insulating material and capable of circulating hot water;
With
The pipe is embedded in the molded heat insulating material in a state where the connection port of the pipe is exposed from the molded heat insulating material,
A plurality of the pipes are embedded in the molded heat insulating material,
Heat insulation for hot water storage tanks exposed from the molded heat insulating material so that all the connection ports of all the pipes embedded in the molded heat insulating material face a predetermined side surface of the outer case that houses the hot water storage tank Wood. The molded heat insulating material has a recess,
The hot water storage tank heat insulating material according to claim 1, wherein the connection port is exposed in the recess.   The heat insulating material for hot water storage tanks according to claim 1 or 2, comprising a device embedded in the molded heat insulating material and through which hot water flows.   The hot-water storage tank heat insulating material according to any one of claims 1 to 3, wherein the molded heat insulating material has a concave portion that exposes an intermediate portion of the pipe, and an accessory can be attached to the pipe from the concave portion. .   The heat insulating material for hot water storage tanks in any one of Claims 1 thru | or 4 which has the location where the centerline of the said connection port of these piping is mutually parallel.   The heat insulating material for a hot water storage tank according to any one of claims 1 to 5, wherein the vacuum heat insulating material and the pipe are not in contact with each other, and the vacuum heat insulating material and the pipe are separated by the molded heat insulating material. .   The heat insulating material for hot water storage tanks of any one of Claims 1 thru | or 6 which has the said piping located between the said hot water storage tank and the said vacuum heat insulating material.   The heat insulating material for hot water storage tanks according to any one of claims 1 to 6, further comprising the pipe located on the opposite side of the hot water storage tank via the vacuum heat insulating material.   The plurality of pipes include the pipe located between the hot water storage tank and the vacuum heat insulating material and the pipe located on the opposite side of the hot water storage tank via the vacuum heat insulating material. The heat insulating material for hot water storage tanks of any one of 1 thru | or 6.   The temperature of the hot water passing through the pipe located between the hot water storage tank and the vacuum heat insulating material is higher than the temperature of the hot water passing through the pipe located on the opposite side of the hot water storage tank via the vacuum heat insulating material. 9. Heat insulation for hot water storage tanks according to 9.   When viewed from above with the hot water storage tank mounted with the hot water storage tank heat insulating material in the posture at the time of installation, the connection ports of the plurality of pipes protrude in a predetermined direction, and in each of the protruding directions, The heat insulating material for hot water storage tanks according to any one of claims 1 to 10, wherein the connection port has a portion having a height different from each other.   The heat insulating material for hot water storage tanks according to any one of claims 1 to 11, wherein the pipe is displaceable with respect to the molded heat insulating material. The hot water storage tank;
A hot water storage tank for heat insulating material according to any one of claims 1 to 1 2,
Hot water storage type water heater equipped with.

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