JP2014114975A - Heat storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat storage tank in which workability in installation is improved.SOLUTION: A heat storage tank 3 includes a non-metal storage body 31 for storing a heat medium heated by a solar collector. The storage body part 31 includes a binding part 63 that can bind a fixation member 61 fixed to an installation plane on which a bottom surface 34 of the storage body part 31 is directly mounted.

Description

  The present invention relates to a heat storage tank.

  2. Description of the Related Art Conventionally, from the viewpoint of energy saving, a solar heat-use hot water supply system that uses hot water to supply hot water is known (see, for example, Patent Document 1).

  First, a conventional solar hot water supply system will be described. FIG. 7 is a schematic configuration diagram of a conventional solar thermal hot water supply system, and FIG. 8 is an exploded configuration diagram of a hot water storage tank 503 provided in the solar thermal hot water supply system.

  The solar-heat-use hot water supply system illustrated in FIG. 7 is disposed in the solar-heat collector 501 that heats the heat medium using solar heat, the hot-water storage tank 503, and the hot-water storage tank 503 and is heated by the solar-heat collector 501. A heat exchanger 505 that exchanges heat between the heat medium and the water in the hot water storage tank 503, a heat medium feed pipe 507 that sends the heat medium in the solar heat collector 501 to the heat exchanger 505, and a heat medium return pipe 509 And a circulation pump 511 for circulating the heat medium between the solar heat collector 501 and the heat exchanger 505, and a hot water tank 503 in the heat medium return pipe 509 and the circulation pump 511, and An expansion tank (systern) 513 that absorbs expansion / contraction of the heat medium and a control device 515 that controls the circulation pump 511 are provided.

  As shown in FIG. 7, the hot water storage tank 503 has a water supply port connected to a water supply pipe 517 for supplying water from the water supply at the lower part, and has a hot water outlet connected to a hot water discharge pipe 519 for discharging hot water at the upper part. doing. Further, as shown in FIG. 8, the hot water storage tank 503 includes a tank 601 made of a metal (for example, stainless steel) having excellent corrosion resistance, a heat insulating material 603 attached so as to cover the outer surface of the tank 601, and a heat insulating material 603. An exterior 605 attached to cover the periphery and a leg 607 that supports the tank 601 are provided (see, for example, Patent Documents 2 to 4). In the hot water tank 503, the tank 601 is kept warm by the heat insulating material 603, and the design property is secured by the exterior 605. The hot water storage tank 503 is a vertical type whose height is larger than the installation width in order to make it easy to gather hot hot water at the upper part having the outlet, and is supported by a solid metal leg 607.

  A pressure reducing valve 525 and a drain valve 527 are disposed in a water supply pipe 517 that supplies water to the hot water storage tank 503. The pressure reducing valve 525 is a valve that adjusts the feed water pressure to the hot water storage tank 503 in order to keep the pressure in the hot water storage tank 503 constant.

  A hot water heater (auxiliary heater) 531 that heats hot water discharged from the hot water storage tank 503 as necessary is connected to the hot water outlet pipe 519 through a temperature control valve 533. The temperature adjustment valve 533 is connected to a mixing water supply pipe 529 branched from a water supply pipe 517 downstream of the pressure reducing valve 525, and previously mixed hot water in the hot water storage tank 503 and cold water supplied from the water supply pipe 517 are used to supply hot water. Water enters the vessel 531. Between the temperature control valve 533 and the water heater 531, a switching valve 537 connected to the direct water supply pipe 535 branched from the water supply pipe 517 upstream of the pressure reducing valve 525 is disposed. By using this switching valve 537, it is possible to switch between the case where water is introduced into the water heater 531 from the hot water outlet pipe 519 and the case where the water is supplied directly from the water supply pipe 517.

  The control device 515 is provided in the hot water storage tank 503 and detects the temperature of the water in the hot water storage tank 503, and the heat that is provided in the vicinity of the solar heat collector 501 and detects the temperature of the heat medium. The medium temperature sensor 523 is connected. The control device 515 controls the operation and stop of the circulation pump 511 based on the temperature difference between the temperature of the water detected by the water temperature sensor 521 and the temperature of the heat medium detected by the heat medium temperature sensor 523. To do.

Japanese Patent Laid-Open No. 10-89776 JP 2004-69096 A JP 2002-122359 A JP 2007-198716 A

  In such a conventional solar hot water supply system, the hot water storage tank 503 is generally installed on a concrete base constructed on an installation plane (ground) on which the hot water storage tank 503 is placed ( For example, see Patent Document 4.) This is to prevent the hot water storage tank 503 from sinking due to the large weight per unit area of the hot water storage tank 503, which is a vertical type, and metal legs that support the hot water storage tank 503. It is also for preventing corrosion of 607.

  Although it depends on the season and the weather, it takes about 5 to 7 days for the concrete to dry. For this reason, at the time of construction of the foundation, the worker should be at the same construction site at least twice during the placement of the concrete foundation and the work such as removing the formwork after the concrete is dried and installing the hot water storage tank 503 and connecting the pipes. I need to go out. As described above, conventionally, when the hot water storage tank 503 is installed, it takes a long time to construct and there is a problem that workability is not good.

  Moreover, although the simple foundation which abbreviate | omitted the effort of the frame type | mold removal for shortening construction time may be used, construction expense is high and cost increases.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the thermal storage tank which improved the workability | operativity at the time of installation.

In order to achieve the above-described object, the heat storage tank according to the present invention is characterized by the following (1) to (4).
(1) A non-metallic storage main body for storing a heat medium heated by a solar heat collector,
The storage main body has a fastening part capable of fastening a fixing member fixed to an installation plane on which the bottom surface of the storage main body is directly placed.
about.
(2) A heat storage tank having the configuration of (1) above,
The bottom surface of the storage body portion is formed in a rectangle, and the length of the long side of the bottom surface is longer than the length in the height direction of the storage body portion,
about.
(3) A heat storage tank having any one of the above (1) and (2),
The storage main body is formed of a resin material,
about.
(4) A heat storage tank having any one of the above (1) to (3),
The storage main body is integrally formed by a core material made of a thermoplastic foam resin and an outer skin made of a thermoplastic resin that covers the core material.
about.

In the heat storage tank having the above-described configuration (1), the storage main body portion is formed of a non-metal, and the bottom surface is directly placed on the installation plane, and is tightly coupled to a fixing member fixed to the installation plane, with respect to the installation plane. Fixed. That is, since the storage main body directly mounted on the installation plane is made of non-metal, it is not necessary to consider corrosion, and the heat storage tank is in surface contact with the installation plane, so the weight per unit area is relatively Because of its small size, it is not necessary to construct a concrete foundation as in the past. As a result, the work time required for installing the heat storage tank can be reduced, and workability at the time of installation can be improved.
In the heat storage tank having the configuration (2), the storage main body portion is formed in a horizontal type in which the bottom surface is formed in a rectangular shape and the length of the long side of the bottom surface is longer than the length in the height direction. Thereby, it becomes difficult for the storage main-body part to fall down. For this reason, it is only necessary to prevent the storage main body portion from being dragged depending on the tightness using the fixing member. Moreover, height can be reduced by setting it as a horizontal installation type | mold, it can improve design property and can prevent the design property in the vicinity of an installation location.
In the heat storage tank having the configuration (3), the storage main body is formed of a resin material, and thus is lightweight and has high strength and heat insulation. Therefore, since it is lightweight, it is easy to carry, and strength and heat insulation can be enhanced.
In the heat storage tank configured as described in (4) above, the storage main body is integrally formed by the core material made of thermoplastic foam resin and the outer skin made of thermoplastic resin covering the core material. Higher strength and thermal insulation. Therefore, strength and heat insulation can be further enhanced.

  According to the heat storage tank of this invention, the heat storage tank which improved the workability | operativity at the time of installation can be provided.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a schematic configuration diagram of a solar hot water supply system using a heat storage tank according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a heat storage tank and a peg according to the embodiment of the present invention. FIG. 3 is a perspective view showing a state in which a fixing member and a cover are attached to the heat storage tank according to the embodiment of the present invention. Fig.4 (a) is a schematic cross-sectional view of the thermal storage tank which concerns on embodiment of this invention, FIG.4 (b) is a partially expanded view of the part shown with the code | symbol A in Fig.4 (a). . FIG. 5 is a process diagram showing a heat storage tank installation method according to an embodiment of the present invention, FIG. 5 (a) is a diagram showing the ground in an untreated stage, and FIG. 5 (b) is leveling the ground. FIG. 5 (c) is a diagram showing a step of sanding, FIG. 5 (d) is a diagram showing a step of arranging a heat storage tank on the ground, and FIG. 5 (e) is a diagram showing heat storage. It is a figure which shows the process of fixing a tank to the ground by peg hitting. FIG. 6 is an exploded perspective view showing a heat storage tank and a peg according to a modification. FIG. 7 is a schematic configuration diagram of a conventional solar hot water supply system. FIG. 8 is an exploded configuration diagram of a conventional hot water tank.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, a solar water heating system 1 according to the present embodiment is configured as a forced circulation type in which a heat medium L is forcedly circulated to exchange heat, and a solar heat collector 2 and an open air heat storage tank. 3, a heat medium feed pipe 4, a heat medium return pipe 5, a heat exchanger 6, a circulation pump 7, a control device 8, a temperature control valve (temperature control device) 9, and a water heater (auxiliary heater) ) 10.

  The solar heat collector 2 has, for example, a rectangular plate shape, and has a heat collector area of about 2 square meters, which is 2 m long (roof flow direction), 1 m wide (direction along the purlin), and 60 mm thick. The solar heat collector 2 has an internal flow path for circulating the heat medium L therein, and heats the heat medium L using solar heat. Generally, the internal flow path is installed on the roof surface in the direction of the longitudinal side, and a plurality of the internal flow paths are used side by side. In the present embodiment, two solar heat collectors 2 are connected and provided, and the heat medium L is heated using solar heat.

  The heat storage tank 3 is a horizontal tank that is installed in a space under the eaves or the like and stores the heat medium L heated by the solar heat collector 2, and has a liquid storage capacity of about 200 liters. As shown in FIG.2 and FIG.3, the thermal storage tank 3 of this embodiment has the rectangular parallelepiped storage main-body part 31 which stores the heating medium L which has an upper opening and was heated with the solar-heat collector 2, and storage. The cover part 32 which covers the upper opening of the main-body part 31 is provided, and it is formed with the synthetic resin which integrally molded the heat insulating material. As shown in FIGS. 4 (a) and 4 (b), the storage main body 31 and the lid 32 have a core material 37 made of a thermoplastic foam resin and an outer skin made of a thermoplastic resin that covers the core material 37. 39, and a three-layer structure in which a core material 37 made of a foam is covered with a resin outer skin 39. For this reason, the storage main-body part 31 and the cover part 32 are lightweight, and intensity | strength and heat insulation are high. Moreover, the bottom face 34 of the storage main-body part 31 is formed in a rectangle, and the thermal storage tank 3 is directly mounted on the ground which is an installation plane, and is installed. As shown in FIG. 2, the heat storage tank 3 is formed in a horizontal type in which the height H is smaller than the installation width W that is the length of the long side of the bottom surface 34 of the storage main body 31. The storage main body 31 is formed, for example, in such a dimension that the length of the long side is 200 cm, the length of the short side is 50 cm, and the height is 55 cm. Further, as shown in FIGS. 2 and 3, metal wedge-shaped pegs (fixing members) that are driven into the ground and fixed at the lower corners of the side surfaces 36, 36 that are the short side surfaces of the bottom surface 34. ) A nut (tightening portion) 63 for bolting (tightening) 61 with a bolt 62 is embedded. The manufacturing method and installation method of the heat storage tank 3 will be described later. In addition, a plurality of insertion holes are formed in the side surfaces 36 and 36 of the storage main body portion 31 for inserting pipes and the like. And as shown in FIG. 4, the cover 70 for covering the location in which the said penetration hole was formed is attached to the storage main-body part 31. As shown in FIG. The lid 32 covers the upper opening of the storage body 31 so that the heat medium L does not flow out of the storage body 31 or rainwater does not flow into the storage body 31, but is not shown. The inside of the storage main body 31 is opened to the atmosphere by an air hole.

  A heat exchanger 6 is installed inside the storage main body 31, and the heat exchanger 6 passes through the storage main body 31 and is connected to the water supply pipe 11 and the hot water discharge pipe 13. The heat storage tank 3 stores the heat medium L heated by the solar heat collector 2 using solar heat and heats water supplied from the water supply pipe 11 and passing through the heat exchanger 6 to supply hot water from the hot water discharge pipe 13. As you get out.

  The storage body 31 is provided with an inlet 33 connected to the heat medium feed pipe 4 and an outlet 35 connected to the heat medium return pipe 5, and communicates with an internal channel (not shown) of the solar heat collector 2. ing. In addition, a drain port (not shown) that is opened when the heat medium L is removed from the storage main body 31 is provided at the lower portion of the storage main body 31. The heat medium L stored in the storage main body 31 is heated by circulating between the solar heat collector 2 and becomes high temperature.

  One end of the heat medium feed pipe 4 is connected to the inlet / outlet pipe 21 that is the drain side of the downstream solar heat collector 2, and the other end is connected to the inlet 33 of the storage main body 31. One end of the heat medium return pipe 5 is connected to the outlet 35 of the storage main body 31, and the other end is connected to the inlet / outlet pipe 23 serving as the water injection side of the upstream solar heat collector 2.

  The heat exchanger 6 according to the present embodiment is formed by bending a stainless steel pipe and extending in the horizontal direction along the longitudinal direction of the storage main body 31. In the present embodiment, the heat exchanger 6 extends in the horizontal direction while meandering along the longitudinal direction of the storage main body 31, but the present invention is not limited to this. For example, the heat exchanger 6 can be arranged spirally in the storage main body 31 or can be arranged so as to overlap. In the present embodiment, the heat exchanger 6 is formed by bending a stainless steel pipe, but may be formed by bending a copper pipe, for example.

  One end of the heat exchanger 6 is connected to the water supply pipe 11 and the other end is connected to the hot water discharge pipe 13. The water supplied from the water supply pipe 11 and the heat medium L that has reached a high temperature in the heat storage tank 3 Heat is exchanged between the hot water and hot water.

The circulation pump 7 is provided in the middle of the heat medium return pipe 5, and circulates the heat medium L between the solar heat collector 2 and the heat storage tank 3 by pressurizing and conveying the heat medium L from the storage main body 31. Let
In the present embodiment, an antifreeze liquid mainly composed of propylene glycol is used for the heat medium L from the viewpoint of safety. In addition, water can be used for the heating medium L when the circulating pump 7 is driven at all times or at a predetermined interval so that the heating medium L can be constantly circulated to prevent freezing.

  The control device 8 is provided in the vicinity of the heat storage tank 3 and detects the temperature of the heat medium L in the heat storage tank 3, and the control device 8 is disposed in the vicinity of the solar heat collector 2 and detects the temperature of the heat medium L. Connected to the second sensor 53. Then, the control device 8 operates and stops the circulation pump 7 based on the temperature difference between the temperature of the heat medium L detected by the first sensor 51 and the temperature of the heat medium L detected by the second sensor 53. To control.

  In addition, if the 1st sensor 51 and the 2nd sensor 53 can detect the temperature of the heat carrier L in the thermal storage tank 3 and the solar heat collector 2, respectively, in the thermal storage tank 3 and the solar heat collector 2 respectively. Even if it is provided, it may be provided in the heat medium return pipe 5 in the vicinity of the heat storage tank 3 and the heat medium feed pipe 4 in the vicinity of the solar heat collector 2.

  A hot water heater 10 that heats hot water discharged from the heat exchanger 6 as necessary is connected to the hot water discharge pipe 13 of the present embodiment via a temperature control valve 9. A water supply pipe for mixing 41 branched from the water supply pipe 11 is connected to the temperature control valve 9, and the hot water discharged from the heat exchanger 6 and the water supplied from the water supply pipe for mixing 41 in advance have a predetermined temperature ( For example, it is mixed so that it becomes 30 degreeC. In addition, it can replace with the temperature control valve 9, and can also use the mixing unit which is a temperature control apparatus.

  A switching valve 43 connected to a direct water supply pipe 45 branched from the water supply pipe 11 is disposed between the temperature control valve 9 and the water heater 10. By using this switching valve 43, it is possible to switch between the case where the water entering the water heater 10 is performed from the temperature control valve 9 and the case where it is performed directly from the water supply pipe 11.

  When the hot water supply operation is performed, the hot water heater 10 is heated by igniting the hot water gas burner as necessary, and the hot water flowing from the temperature control valve 9 connected to the hot water discharge pipe 13 is subjected to heat exchange. Hot water having a predetermined hot water supply set temperature is supplied from a hot water supply pipe 47 to a hot water outlet terminal (not shown) such as a currant or a shower head.

Next, the effect | action of the solar heat utilization hot water supply system 1 which has the said structure is demonstrated.
In the solar heat utilization hot water supply system 1 of the present embodiment, when the solar heat collector 2 is exposed to sunlight, the heat medium L in the solar heat collector 2 is heated.
The control device 8 has a temperature difference between the temperature of the heat medium L in the solar heat collector 2 detected by the second sensor 53 and the temperature of the heat medium L in the heat storage tank 3 detected by the first sensor 51. When the temperature is equal to or higher than the predetermined start temperature, the heat collection operation program is started, and the circulation pump 7 is operated by a power source such as a solar cell (not shown) to start the heat collection operation.

  Therefore, the solar heat-utilizing hot water supply system 1 can avoid the energy-saving economical heat collection operation, and the temperature of the heat medium L in the vicinity of the solar heat collector 2 installed outdoors in the winter season or the like is in the heat storage tank 3. The temperature drop of the heat medium L in the heat storage tank 3 due to the heat collecting operation when the temperature of the heat medium L is lower can be prevented.

When the heat collection operation is started, the circulation pump 7 rotates to force the heat medium L to the heat medium return pipe 5, the solar heat collector 2, the heat medium feed pipe 4, the heat storage tank 3, and the circulation pump 7. Circulate. As a result, the heat medium L stored in the heat storage tank 3 is heated.
When the temperature difference between the heat medium L in the solar heat collector 2 and the heat medium L in the heat storage tank 3 becomes less than a predetermined start temperature, the control device 8 stops the circulation pump 7 and performs heat collection operation. Exit.

  The selector valve 43 is switched so that the water supply to the hot water heater 10 is supplied from the hot water outlet pipe 13, and the hot water outlet terminal downstream of the hot water heater 10 is opened with the hot water supply operation of the solar hot water supply system 1 being performed. Then, the water supplied from the water supply pipe 11 flows into the temperature control valve 9 from the hot water discharge pipe 13 through the heat exchanger 6 and is supplied to the water heater 10. Here, the water supplied from the water supply pipe 11 to the heat exchanger 6 is heat-exchanged with the heat medium L having a high temperature in the heat storage tank 3, and warmed hot water is discharged into the hot water discharge pipe 13.

  The hot water that has flowed into the temperature control valve 9 is mixed with hot water discharged from the heat exchanger 6 and water supplied from the mixing water supply pipe 41 at a predetermined temperature (for example, 30 ° C.). Supplied. The hot water heater 10 heats the hot water supplied from the temperature control valve 9 to a predetermined hot water supply set temperature as necessary and supplies the hot water to the outlet terminal from the hot water supply pipe 47.

  Next, the manufacturing method of the storage main-body part 31 which comprises the thermal storage tank 3 is demonstrated. In this specification, in order to simplify the description, the manufacturing method of the storage main body 31 will be briefly described with illustration omitted. For details of the manufacturing method, for example, refer to the description of Japanese Patent Application No. 2012-062384, which is an earlier application by the applicant of the present application.

  The storage main body 31 of the heat storage tank 3 according to the present embodiment has an introduction process of vertically extruding a bowl-shaped parison made of thermoplastic resin and introducing it into a pair of molds, and thermoplastic inside the introduced parison. A filling step of filling the foamed resin, a mold clamping step of clamping the parison filled with the thermoplastic foamed resin from a horizontal direction by a pair of molds having cavities having an outer shape of the storage body, and a parison And a foaming step of foaming the thermoplastic foamed resin filled therein. Thereby, the storage main body 31 formed integrally with the core material 37 made of the thermoplastic foam resin and the outer skin 39 made of the thermoplastic resin covering the core material 37 is manufactured.

In the mold clamping step, a mold having a shape in which a press-fitting hole for press-fitting the nut 63 is formed at the lower end corners of the side surfaces 36 and 36 of the storage main body 31 is used. As a result, press-fitting holes are formed in the lower end corners of the side surfaces 36 and 36 of the storage main body 31. Then, when the nut 63 is press-fitted (screwed) into the press-fitting hole of the manufactured storage main body 31, the storage main body 31 is embedded with the nut 63 as shown in FIG.
In this embodiment, the nut 63 is press-fitted into a press-fitting hole formed in the storage main body 31. However, the nut 63 is embedded in a predetermined location inside the storage main body 31 in advance by outsert molding or the like. It does not matter as a configuration.

Next, the manufacturing method of the cover part 32 of the thermal storage tank 3 is demonstrated.
Since the lid portion 32 is plate-shaped and does not need to be deep-drawn unlike the storage main body portion 31, super blow molding is a known technique for integrally molding a resin outer shell and a foamed resin core material. (For example, refer to Japanese Patent No. 2652732). As a result, the lid portion 32 of the heat storage tank 3 formed integrally with the core material 37 made of thermoplastic foamed resin and the outer skin 39 made of the thermoplastic resin covering the core material 37 is formed.

  Next, with reference to FIG. 5, the installation method of the thermal storage tank 3 is demonstrated. FIG. 5 is a process diagram showing a heat storage tank installation method according to an embodiment of the present invention, FIG. 5 (a) is a diagram showing the ground in an untreated stage, and FIG. 5 (b) is leveling the ground. FIG. 5 (c) is a diagram showing a step of laying sand, FIG. 5 (d) is a diagram showing a step of arranging a heat storage tank on the ground, and FIG. It is a figure which shows the process of fixing a thermal storage tank to the ground by peg hitting. In FIG. 5, the scale of each part is appropriately changed and shown for easy understanding of the configuration.

First, the operator levels the surface layer of the ground 71 in the unprocessed stage. Specifically, as shown in FIG. 5B, the topsoil is cut and flattened by about 0 to 3 cm in order to remove unevenness and stones existing on the ground surface. Thereby, a hole 73 having a flat bottom surface is defined in the ground 71. Next, as shown in FIG. 5 (c), the ground surface is leveled with sand 75 in a hollow portion including the hole 73 so that the ground surface becomes flat. And as shown in FIG.5 (d), the thermal storage tank 3 is arrange | positioned on the surface made flat, and an installation location is decided. Thereafter, as shown in FIG. 5 (e), the pegs 61 are sequentially driven and fixed on the ground 71, and the driven pegs 61 are bolted to the nuts 63 embedded in the storage main body 31. Thereby, the heat storage tank 3 is fixed to the ground 71.
In addition, when the ground surface is not necessary, such as when the ground surface is flat in advance, the process of cutting the topsoil and the step of sanding is omitted, and the work is started from the step of arranging the heat storage tank 3 on the ground 71. It doesn't matter.

  According to the installation method described above, the installation work that has conventionally taken several days can be completed in several tens of minutes. In addition, the number of parts required for construction is fewer than before. For this reason, workability | operativity at the time of installation can be improved.

(Modification)
Next, a modified example of the heat storage tank 3 according to the embodiment will be described. FIG. 6 is an exploded perspective view showing a heat storage tank and a peg according to a modification. The heat storage tank 3A according to the modified example is different from the heat storage tank 3 according to the above-described embodiment in that the position where the nut 63 for bolting the peg 61A is embedded is the corner of the bottom surface 34. Further, since the peg 61A is attached to the bottom surface 34, the position of the hole through which the bolt 62 is inserted is different from the peg 61 according to the above-described embodiment. Since the other points are the same as those of the heat storage tank 3, the same reference numerals are given to the same members, and only different points will be described.

  In the heat storage tank 3A according to the modified example, as shown in FIG. 6, nuts 63 are embedded in the four corners of the bottom surface 34. The nut 63 is used for bolting a metal wedge-shaped peg 61 </ b> A with a bolt 62.

  As described above, when installing the heat storage tank 3, the operator places the heat storage tank 3 on the ground, then drives the peg 61 into the ground, and the driven peg 61 is embedded in the storage main body 31. Bolt the nut 63. On the other hand, when installing the heat storage tank 3A according to the modification, the operator bolts the peg 61A to the bottom surface 34 of the storage main body 31, and then attaches the heat storage tank 3A to which the peg 61A is fixed. Place at the installation location. At this time, the heat storage tank 3A is placed on the ground such that the tip of the peg 61A is stuck into the ground. Thereby, the peg 61A enters the ground by the weight of the heat storage tank 3A. At this time, the operator may press the heat storage tank 3A vertically downward. As a result, the heat storage tank 3A is fixed to the ground. Therefore, when the heat storage tank 3A according to the modification is used, the peg driving work can be omitted or simplified.

  Below, the effect | action and effect of the thermal storage tank 3 which concern on this embodiment are demonstrated.

The heat storage tank 3 according to the present embodiment includes a non-metallic storage main body 31 that stores the heat medium L heated by the solar heat collector 2, and the storage main body 31 is a bottom surface of the storage main body 31. 34 has a nut (tightening portion) 63 capable of fastening a peg (fixing member) 61 fixed to an installation plane (ground) on which 34 is directly placed.
That is, the storage main body 31 is formed of a non-metal, and the bottom surface 34 is directly placed on the installation plane, and is fastened to the peg 61 fixed by being driven into the installation plane and fixed to the installation plane. According to this structure, since the storage main body 31 directly mounted on the installation plane is made of non-metal, it is not necessary to consider corrosion, and the heat storage tank 3 is in surface contact with the installation plane, so that the unit area Since the hit weight is relatively small, it is not necessary to construct a concrete foundation as in the prior art. As a result, the work time required for installing the heat storage tank 3 can be reduced, and workability at the time of installation can be improved.

Further, in the heat storage tank 3 according to the present embodiment, the bottom surface 34 of the storage main body 31 is formed in a rectangular shape, and the length of the long side (installation width W) of the bottom surface 34 is the length in the height direction of the storage main body 31. Longer than height (height H).
That is, the storage main body 31 is formed in a horizontal type in which the bottom surface 34 is formed in a rectangular shape and the length of the long side of the bottom surface 34 is longer than the length in the height direction. Thereby, it becomes difficult for the storage main-body part 31 to fall down. For this reason, only the dragging of the storage main body 31 may be prevented depending on the tightness using the peg 61. Moreover, height can be reduced by setting it as a horizontal installation type | mold, it can improve design property and can prevent the design property in the vicinity of an installation location.

  Moreover, as for the thermal storage tank 3 which concerns on this embodiment, the storage main-body part 31 is formed with the resin material. For this reason, the heat storage tank 3 is lightweight and has high strength and heat insulation. Therefore, the heat storage tank 3 can be easily carried, and in addition, the strength and heat insulation can be enhanced.

  In the heat storage tank 3 according to this embodiment, the storage main body 31 is integrally formed by a core material 37 made of a thermoplastic foamed resin and an outer skin 39 made of a thermoplastic resin that covers the core material 37. ing. For this reason, the heat storage tank 3 has higher strength and heat insulation, and the strength and heat insulation are further enhanced.

  Moreover, in the thermal storage tank 3 which concerns on this embodiment, the storage main-body part 31 which has the function of the heat insulation member and the exterior member is integrally formed. As a result, according to the heat storage tank 3 according to the present embodiment, the number of parts can be reduced as compared with the conventional case.

  Moreover, in the conventional hot water storage tank 503, it is necessary to set it as the vertical installation type whose height is larger than an installation width | variety in order to gather hot hot water at the upper part which has a tap. On the other hand, the heat exchanger 6 of the present embodiment only needs to be able to exchange heat with the heat medium L stored in the heat storage tank 3, so that both ends connected to the water supply pipe 11 and the hot water discharge pipe 13 are taken out. The position is not restricted, and the outer shape of the heat storage tank 3 is free. For this reason, the heat storage tank 3 according to the present embodiment is formed in a horizontal type in which the height H is smaller than the installation width W. As a result, the storage main body 31 can be directly placed on the ground, and the heat storage tank 3 is not easily overturned, so that the legs of the heat storage tank 3 can be omitted.

  The technical scope of the present invention is not limited to the embodiment described above. The above-described embodiments can be accompanied by various modifications and improvements within the technical scope of the present invention.

  For example, in the present embodiment, the storage main body 31 is made of resin, but the storage main body 31 may be made of a non-metallic material that is resistant to corrosion. It doesn't matter.

  In the present embodiment, the installation plane is described as the ground from which the soil is exposed, but the installation plane may be the ground on which concrete pavement or the like has been performed.

  Further, in the present embodiment, the peg 61 is used as the fixing member, the nut 63 is used as the fastening portion, and the bolting is used as the fastening means. However, the technical scope of the present invention is not limited thereto. In addition, various fastening methods can be applied.

DESCRIPTION OF SYMBOLS 1 ... Solar hot water supply system 2 ... Solar heat collector 3 ... Thermal storage tank 4 ... Heat-medium feed piping 5 ... Heat-medium return piping 6 ... Heat exchanger 7 ... Circulation pump 8 ... Control device 9 ... Temperature control valve 10 ... Water heater DESCRIPTION OF SYMBOLS 11 ... Supply pipe 13 ... Outlet pipe 31 ... Storage main-body part 32 ... Cover part 34 ... Bottom surface 36 ... Side surface 37 ... Core material 39 ... Outer skin 61 ... Peg (fixing member)
62 ... Bolt 63 ... Nut (tightening member)
70 ... Cover 71 ... Ground 73 ... Hole 75 ... Sand L ... Heat transfer medium W ... Installation width H ... Height

Claims (4)

A non-metallic storage main body for storing a heat medium heated by a solar heat collector,
The storage main body has a fastening part capable of fastening a fixing member fixed to an installation plane on which the bottom surface of the storage main body is directly placed.
A heat storage tank characterized by that. The bottom surface of the storage body portion is formed in a rectangle, and the length of the long side of the bottom surface is longer than the length in the height direction of the storage body portion,
The heat storage tank according to claim 1. The storage main body is formed of a resin material,
The heat storage tank according to any one of claims 1 and 2. The storage main body is integrally formed by a core material made of a thermoplastic foam resin and an outer skin made of a thermoplastic resin that covers the core material.
The heat storage tank according to any one of claims 1 to 3, wherein the heat storage tank is provided.

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