JP5195773B2 - Hot water storage tank - Google Patents

Description

  The present invention relates to a hot water storage tank for storing hot water heated by a heating means.

The hot water storage tank has a tank main body that stores hot water. Since the tank main body is made of stainless steel or the like, the stored hot water is cooled by heat radiation from the surface of the tank main body. Therefore, a heat insulating material is generally attached around the tank body.

Patent Document 1 discloses an example of a hot water storage tank having a tank body and a heat insulating material covering the periphery of the tank body. In this hot water storage tank, a plurality of thermistors are arranged on the outer peripheral surface of the tank main body substantially evenly in the height direction of the tank main body. And the cover member which consists of heat insulating materials is provided so that this thermistor may be covered.

JP 2007-183052 A

However, in the hot water storage tank disclosed in Patent Document 1, since the lid member is formed of a heat insulating material such as styrene or glass wool, the heat insulating performance is low, and heat is radiated from the surface of the tank body through the lid member. There was a problem.

Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a hot water storage tank that can suppress heat dissipation from the tank surface via a lid member.

A hot water storage tank according to a first aspect of the present invention is disposed so as to be fitted to the tank main body for storing hot water, a peripheral member attached to the tank main body and formed of a heat insulating material having an opening, and the opening. And a lid member formed of a heat insulating material, and a vacuum heat insulating material having a flat inner surface side and outer surface side is provided inside the lid member.

In this hot water storage tank, since the vacuum heat insulating material is provided on the lid member, it is possible to suppress heat dissipation from the surface of the tank body through the lid member.

Moreover, in this hot water storage tank, since the lid member protects the vacuum heat insulating material, the possibility of breakage of the vacuum heat insulating material is reduced, and the reliability of the vacuum heat insulating material is improved. Further, when a thermistor or the like is attached to the tank body, damage to the thermistor or the like due to contact between the thermistor or the like and the vacuum heat insulating material can be reduced.

A hot water storage tank according to a second aspect of the present invention is the hot water storage tank according to the first aspect of the present invention, wherein a thermistor is disposed inside the opening in the outer peripheral surface of the tank body.

In this hot water storage tank, by providing a vacuum heat insulating material on the lid member, heat radiation from the opening to which the thermistor is attached can be suppressed, so the reliability of the temperature detected by the thermistor is improved.

  As described above, according to the present invention, the following effects can be obtained.

In 1st invention, since the vacuum heat insulating material is provided in the cover member, it can suppress that heat is radiated from the surface of a tank main body via a cover member.

In the first invention, since the lid member protects the vacuum heat insulating material, the possibility of breakage of the vacuum heat insulating material is reduced, and the reliability of the vacuum heat insulating material is improved. Further, when a thermistor or the like is attached to the tank body, damage to the thermistor or the like due to contact between the thermistor or the like and the vacuum heat insulating material can be reduced.

In 2nd invention, since the heat radiation from the opening part in which the thermistor was attached can be suppressed by providing a vacuum heat insulating material in a cover member, the reliability of the temperature which a thermistor detects improves.

It is a piping system diagram of a hot water supply apparatus according to a reference example of the present invention. It is a figure which shows a hot water storage unit, (a) is an external front view, (b) is an internal front view, (c) is an AA arrow directional cross-sectional view of (b). It is a disassembled perspective view of a hot water storage tank. It is a front view in the state which attached the surrounding member to the tank main body. It is a figure which shows the shape of an upper cover member, Comprising: (a) is an inner surface front view, (b) is an arrow view of (a). It is a figure which shows the shape of an inner cover member, Comprising: (a) is an inner surface front view, (b) is an arrow view of (a). It is a figure which shows the shape of a lower cover member, Comprising: (a) is an inner surface front view, (b) is an arrow view of (a). It is sectional drawing of a hot water storage tank. (A) is a figure which shows embodiment of a hot water storage tank, (b) is a figure which shows the reference example of a hot water storage tank.

Hereinafter, a reference example of a hot water storage tank according to the present invention will be described based on the drawings.

[Configuration of water heater]
FIG. 1 is a piping system diagram of a hot water supply apparatus 1 according to a reference example . The hot water supply apparatus 1 is an apparatus that supplies hot water to a curan A, a shower B, and a bath C (hereinafter, the curan A, the shower B, and the bath C are collectively referred to as “warm water supply terminal” as appropriate). As shown, a heat pump unit 1a and a hot water storage unit 1b are provided.

[Heat pump unit 1a]
The heat pump unit 1 a heats water supplied from the lower part of the tank body 21 that stores hot water, and supplies the heated hot water to the tank body 21. This heat pump unit 1a
Includes a compressor 10, a water heat exchanger 11, an electric expansion valve 12, an air heat exchanger 13, and a fan 14. The compressor 10, the water heat exchanger 11, the electric expansion valve 12, the air heat exchanger 13, valves, and the like are annularly connected by a refrigerant pipe 15 to constitute a refrigerant circuit 16. On the refrigerant circuit 16, the gas heat exchanger 1 for exchanging heat between the high-temperature and high-pressure refrigerant coming out of the water heat exchanger 11 and the low-temperature and low-pressure refrigerant coming out of the air heat exchanger 13.
7 is arranged.

[Hot water storage unit 1b]
The hot water storage unit 1 b includes a hot water storage tank 20, a boiling circulation circuit 30, a hot water circulation circuit 40, a memory circulation circuit 50, hot water supply circuits 60 and 70, and a water supply circuit 80.

[Hot water storage tank 20]
The hot water storage tank 20 includes a tank main body 21 for storing hot water and a plurality of remaining hot water amount thermistors 22. The tank body 21 stores hot water boiled by the heat pump unit 1a. The tank body 21 is connected to a boiling circulation circuit 30, a hot water circulation circuit 40, a bath hot water supply circuit 60, a currant / shower hot water supply circuit 70, and a water supply circuit 80, and the hot water boiled by the heat pump unit 1a is It is configured to be supplied to the boiling circulation circuit 30, the hot water circulation circuit 40, the bath hot water supply circuit 60, and the currant / shower hot water supply circuit 70. The water supplied from the water supply source S is supplied to the lower part of the tank body 21 through the water supply circuit 80. The plurality of remaining hot water amount thermistors 22 are provided at different height positions of the tank body 21 and detect the remaining hot water amount of the tank body 21.

[Boiling circuit 30]
The boiling circulation circuit 30 is a circuit provided to circulate hot water between the tank body 21 and the heat pump unit 1a. On the circuit, the boiling pump 31, the water heat exchanger 11, A boiling three-way valve 32 is arranged. One end of the boiling circulation circuit 30 is connected to the bottom of the tank body 21 so that low-temperature water at the bottom of the tank body 21 can be discharged. The other end of the boiling circuit 30 branches from the three-way valve 32, one of which is connected to the top of the tank body 21 and the other is connected to the bottom of the tank body 21. Thereby, when the hot water heated by the heat pump unit 1a is low temperature, it becomes possible to return the low temperature water to the lower part of the tank main body 21, and when the hot water heated by the heat pump unit 1a is high temperature. The hot water can be returned to the upper part of the tank main body 21. Further, the boiling circulation circuit 30 is provided with an incoming water thermistor 18 for detecting the temperature of the water supplied to the heat pump unit 1a and a hot water thermistor 19 for detecting the temperature of the water heated by the heat pump unit 1a.

[Hot water circulation circuit 40]
The hot water circulation circuit 40 is a circulation circuit provided to heat the water in the bath C circulating in the memory circulation circuit 50 described later. On this circuit, there are an additional heat exchanger 41 and a heat exchanger pump 42.
And are arranged. One end of the hot water circulation circuit 40 is connected to the top of the tank body 21 so that hot water at the top of the tank body 21 can be discharged. The hot water circulation circuit 4
The other end of 0 is connected to the bottom of the tank body 21, and the low-temperature water heat-exchanged by the additional heat exchanger 41 can be returned to the lower part of the tank body 21.

[Memorial circuit 50]
The memorial circuit 50 is a circulation circuit that circulates the hot water of the bath C, and the water of the bath C is heated by exchanging heat with the hot water circulating through the hot water circulation circuit 40. On this circuit, the bath circulation pump 51 and the above-mentioned regenerative heat exchanger 41 are arranged. The memorial circuit 50 is provided with a bath thermistor 52 that detects the temperature of the hot water in the bath C and a water level sensor 53 that detects the water level in the bath C.

[Bath hot water supply circuit 60]
The bath hot water supply circuit 60 is a circuit for supplying hot water stored in the tank body 21 to the bath C. On the circuit, a hot water mixing valve 61, a hot water solenoid valve 62, and a check valve are provided. 63,
A hot water quantity sensor 64, a check valve 65, and a hot water thermistor 66 are arranged. One end of the bath hot water supply circuit 60 is connected to the top of the tank body 21, and the tank body 2
Hot water at the top of 1 can be discharged. The other end of the bath hot water supply circuit 60 is connected to the bath C. The hot water mixing valve 61 is provided with hot water supplied from the tank body 21 and a water supply source S.
The temperature of the hot water supplied to the bath C is adjusted by mixing the water supplied from.
The hot water sensor 64 is provided to detect the flow rate of hot water supplied to the bath C, and the hot water thermistor 66 is provided to detect the temperature of hot water supplied to the bath C. Yes.

[Karan / shower hot water supply circuit 70]
The currant / shower hot water supply circuit 70 is a circuit for supplying the hot water stored in the tank body 21 to the currant A and the shower B. On the circuit, a hot water supply mixing valve 71, a hot water supply amount sensor 72, A hot water supply thermistor 73 is arranged. One end of the currant / shower hot water supply circuit 70 is connected to the top of the tank body 21 so that hot water at the top of the tank body 21 can be discharged. The other end of the currant / shower hot water supply circuit 70 is connected to the currant A and the shower B. The hot water supply mixing valve 71 adjusts the temperature of the hot water supplied to the currant A and the shower B by mixing the hot water supplied from the tank body 21 and the water supplied from the water supply source S. The hot water supply amount sensor 72 is provided for detecting the flow rate of hot water supplied to the currant A and the shower B, and the hot water supply thermistor 73 is used for detecting the temperature of hot water supplied to the currant A and the shower B. Is provided.

[Water supply circuit 80]
The water supply circuit 80 supplies the tap water supplied from the water supply source S to the tank body 21 and the hot water mixing valve 61.
And a circuit for supplying the hot water supply mixing valve 71. A strainer 81, a check valve 82, a water temperature thermistor 83, and a check valve 84 are arranged on the circuit from the water supply source S to the tank body 21 of the water supply circuit 80. The water temperature thermistor 83 is provided to detect the temperature of tap water supplied from the water supply source S to the tank body 21.

[Structure of hot water storage unit 1b]
2A and 2B are views showing the hot water storage unit 1b, in which FIG. 2A is an external front view of the hot water storage unit 1b, and FIG. 2B is a front view of the hot water storage unit 1b with the front panel 210 removed. (C) is an AA arrow directional cross-sectional view of (b). FIG. 3 is an exploded perspective view of the hot water storage tank 20.

The hot water storage unit 1b accommodates the hot water storage tank 20 and piping constituting the above circuits in the casing 200. As shown in FIG. 2, the hot water storage tank 20 is disposed behind the casing 200, and the piping of each circuit is disposed in front of the hot water storage tank 20.

As shown in FIG. 2 (b), the heat pump 1 among the pipes constituting the boiling circulation circuit 30.
As will be described later, the return pipe 33 through which the warm water returning from a is connected is connected to the return pipe connecting portion 24 at the upper part of the tank body 21, extends downward from the upper right side of the tank body 21, and is substantially at the lower center of the tank body 21. It is connected to the arranged three-way valve 32. Moreover, the bath piping 67 which comprises the bath hot water supply circuit 60 is connected to the bath piping connection part 25 of the upper part of the tank main body 21 so that it may mention later, and is extended below from the upper approximate center of the tank main body 21, FIG.2 (c). As shown in tank body 2
1 is connected to a hot water mixing valve 61 arranged on the side and front side. In addition, hot water supply pipe 7
4 is connected to a hot water supply pipe connecting portion 26 at the upper part of the tank body 21 as will be described later, and extends downward from the upper left side of the tank body 21, as shown in FIG. It is connected to a hot water supply mixing valve 71 disposed on the front side.

[Structure of hot water storage tank 20]
As shown in FIG. 3, the hot water storage tank 20 includes a tank body 21, an upper surface member 90, a side surface member 100, a lower surface member 110, and a lid member 130. Upper surface member 90, side surface member 1
00, the lower surface member 110 and the lid member 130 are formed of a heat insulating material such as styrene or glass wool, and are attached around the tank body 21 to prevent heat dissipation from the surface of the tank body 21. The outer peripheral surface of the tank body 21 includes an upper surface 23a, a side surface 23b, and a lower surface 23c. The upper surface 23a is covered with the upper surface member 90, the side surface 23b is covered with the side surface member 100 and the lid member 130, and the lower surface 23c is the lower surface. Covered by member 110.

In this reference example , the upper surface member 90, the side surface member 100, and the lower surface member 110 are peripheral members attached to the tank main body 21.

<Heat insulation structure on the side of the tank body 21>
As shown in FIG. 3, the side member 100 attached to the side surface 23b of the tank body 21 is
The right side member 101, the left side member 102, and the rear side member 103 are configured. Note that when the right side member 101 and the left side member 102 are attached to the side surface 23b, a vacuum heat insulating material is attached to each inner surface in advance. Here, “right”, “left”, and “rear” indicate that the hot water storage tank 20 is disposed on the right side, the left side, and the back side of the tank body 21 when viewed from the front.

FIG. 4 is a front view of the tank body 21 with the surrounding members attached. In FIG. 3, when considering a state in which the upper surface member 90, the side surface member 100, and the lower surface member 110 are attached to the tank body 21, the side surface 23 b is not entirely covered by the side surface member 100, An opening 140 is formed by the lower layer member 91, the right side member 101, the left side member 102, and the lower surface member 110 of the member 90. A plurality of thermistors 22 arranged on the outer peripheral surface of the tank body 21 are provided inside the opening 140. A lid member 130 is fitted into the opening 140. The lid member 130 includes an upper lid member 131, an intermediate lid member 132, and a lower lid member 133, and is fitted in this order from above.

5-7 is a figure which shows the shape of each cover member 131-133. FIG. 8 shows the tank body 2
FIG. 5 is a cross-sectional view taken along line B-B illustrated in FIG. 4 in a state where peripheral members 90 to 110 and lid members 131 to 133 are attached to FIG.

Fig.5 (a) is a figure which shows the shape of the inner surface side of the upper cover member 131, (b) is the side view seen from the direction of the arrow in (a). The upper end and the lower end of the upper lid member 131 protrude to the inner surface side, and these protrusions are referred to as an upper end protrusion 1311 and a lower end protrusion 1312. And
The inner surface side between the upper end protrusion 1311 and the lower end protrusion 1312 is flat. And
A flat vacuum heat insulating material 151 is attached to the flat portion. When the upper lid member 131 to which the vacuum heat insulating material 151 is attached is fitted into the opening 140, the protruding surface 1311 a of the upper end protruding portion 1311 and the protruding surface 1312 a of the lower end protruding portion 1312 are the side surfaces 23 of the tank body 21.
In order to contact b, a gap is formed between the side surface 23b and the vacuum heat insulating material 151. The thermistor 22 is disposed in this gap. In addition, the vacuum heat insulating material 151 is affixed on the inner surface of the upper lid member 131 with an adhesive tape or the like, and the hatched portion in FIG. 5 indicates the affixing range of the adhesive tape.

FIG. 6A is a view showing the shape of the inner surface side of the inner lid member 132, and FIG. 6B is a side view as seen from the direction of the arrow in FIG. FIG. 7A is a view showing the shape of the inner surface side of the lower lid member 133, and FIG. 7B is a side view as seen from the direction of the arrow in FIG. Similarly to the upper lid member 131, the inner lid member 132 and the lower lid member 133 also have a vacuum heat insulating material 152 on the inner surface.
, 153 are attached and fitted into the opening 140, the upper end protrusions 1321, 1331
And the protruding surfaces 1321a, 1331a, 1322a, 1 of the lower end protruding portions 1322, 1332
Since 332a contacts the side surface 23b of the tank body 21, the side surface 23b and the vacuum heat insulating material 152,
A gap is formed between 153 and 153. The thermistor 22 is disposed in this gap. 6 and 7 also indicate the adhesive tape application range as in FIG.

Next, a side sectional structure of the tank body 21 will be described with reference to FIG. The right side member 101 to which the vacuum heat insulating material 154 is attached, the left side member 102 to which the vacuum heat insulating materials 155 and 156 are attached, and the rear side member 103 are attached to the side surface 23 b of the tank body 21. The rear side surface member 103 and the right side surface member 101 and the rear side surface member 103 and the left side surface member 102 are fitted with no gap, and an opening 140 is formed between the right side surface member 101 and the left side surface member 102. . An inner lid member 132 to which a vacuum heat insulating material 152 is attached is fitted into the opening 140. As described above, a gap is provided between the side surface 23 b of the tank body 21 and the vacuum heat insulating material 152 attached to the inner surface of the inner lid member 132.
Moreover, the vacuum heat insulating materials 154-1 attached to the side surface 23b and the side members 101, 102.
A gap is also provided between the two and 56. The thermistor 22 has an opening 1 on the side surface 23b.
40, which is disposed in a gap provided between the side surface 23b and the vacuum heat insulating material 152.

In addition, although the cross-sectional structure of the portion where the inner lid member 132 is fitted has been described, the upper lid member 13
The cross-sectional structure of the portion where 1 and the lower lid member 133 are fitted is the same as that of the portion where the middle lid member 132 is fitted.

(Characteristics of hot water storage tank according to reference example )
The hot water storage tank according to the reference example has the following characteristics.

In the hot water storage tank 20 of the reference example , a lid member in which vacuum heat insulating materials 151 to 153 are provided in the opening 140 formed by the upper surface member 90, the side surface member 100, and the lower surface member 110 attached around the tank body 21. Since 130 is fitted, it is possible to suppress heat dissipation from the surface of the tank body 21 via the lid members 131 to 133.

Further, in the hot water storage tank 20 of the reference example , the vacuum heat insulating materials 151 to 153 are disposed between the tank main body 21 and the lid members 131 to 133, and therefore, from the surface of the tank main body 21 through the lid members 131 to 133. Heat dissipation can be more effectively suppressed.

Further, in the hot water storage tank 20 of the reference example , since there is a gap between the tank body 21 and the vacuum heat insulating materials 151 to 153, the thermistor 22 can be disposed in the gap, and the thermistor 22 and the vacuum heat insulating materials 151 to 153 are arranged. And the thermistor 22 or the vacuum heat insulating materials 151 to 153 may be damaged.

Moreover, in the hot water storage tank 20 of the reference example , it is suppressed that heat is radiated from the surface of the tank body 21 through the lid members 131 to 133 by providing the vacuum members 151 to 153 on the lid members 131 to 133. Therefore, the reliability of the temperature detected by the thermistor 22 is improved.

In the above reference example , the vacuum heat insulating materials 151 to 153 are attached to the inside of the lid member 130. However, the present invention is not limited to this. For example, as shown in FIG. The form ( embodiment of hot water storage tank 20) provided in the inside of the cover member 134 may be sufficient. In the hot water storage tank 20 of the present embodiment, a lid member 134 provided with a vacuum heat insulating material 157 is formed in the opening 140 formed by the upper surface member 90, the side surface member 100, and the lower surface member 110 attached around the tank body 21. Therefore, it is possible to suppress heat dissipation from the surface of the tank main body 21 through the lid member 134. Further, by providing the vacuum heat insulating material 157 inside the lid member 134, the lid member 134 protects the vacuum heat insulating material 157, so that the possibility of the vacuum heat insulating material 157 being damaged is reduced, and the reliability of the vacuum heat insulating material 157 is improved. Will improve. In addition, as shown in FIG.9 (b), the form (reference example of the hot water storage tank 20) which provides the vacuum heat insulating material 158 in the outer side of the cover member 135 may be sufficient.
As mentioned above, although embodiment of this invention was described based on drawing, specific structure is these.
It should be considered that the present invention is not limited to this embodiment. The scope of the present invention is described above.
Rather than a description of the preferred embodiments, it is indicated by the scope of the claims and is equivalent to the scope of the claims.
All changes within the meaning and scope of are included.

Above Symbol embodiment, the opening 140 is the top surface member 90, lower surface member 110 has been formed in the four peripheral members of the right side member 101 and the left side member 102 is not limited to this, for example, an opening It may be an opening formed in one side member or a notch (one end or both ends of the opening are not closed). Moreover, you may change suitably the number of the members which form the opening used as an opening part.

In the above embodiment, the lid member lid member fitted into the opening 140, but was one third inner lid member 134 and the lower lid member, the number of the lid member is not limited to this, For example, one lid member may be fitted into the opening 140.

Moreover, in the said embodiment, although the hot water supply terminal was set to Karan A, the shower B, and the bathtub C, it is not limited to this, For example, a heating terminal, such as a floor temperature control panel and a radiator, may be sufficient as a hot water supply terminal. .

Moreover, in the said embodiment, although the member arrange | positioned on the outer peripheral surface of the tank main body 21 and inside the opening part 140 was used as the thermistor 22, it is not limited to this, For example, another member may be sufficient.

If this invention is utilized, it will become possible to suppress that heat is radiated from the surface of the tank body via the lid member.

20 Hot water storage tank 21 Tank body 22 Thermistor 23b Side surface 90 Upper surface member (surrounding member)
91 Lower layer member (surrounding member)
100 Side members (surrounding members)
101 Right side member (surrounding member)
102 Left side member (surrounding member)
110 Lower surface member (surrounding member)
120, 151-153 Vacuum heat insulating material 130 Lid member 131 Upper lid member (lid member)
132 , 134 Middle lid member (lid member)
133 Lower lid member (lid member)
140 opening

Claims (2)

A tank body for storing hot water;
A peripheral member attached to the tank body and formed of a heat insulating material having an opening;
A lid member that is arranged to fit into the opening, and formed of a heat insulating material;
With
A hot water storage tank, characterized in that a vacuum heat insulating material having a flat inner surface and an outer surface is provided inside the lid member. The tank on the inside of the opening in the outer peripheral surface of the body, the hot water storage tank according to claim 1, wherein a thermistor is disposed.

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