JPH06300362A - Hot water storing tank device - Google Patents

Abstract

PURPOSE:To provide a hot water tank device by which hot water can be supplied at the temperature of the hot water kept high for a long time by preventing heat radiation from the surface of hot water stored in a hot water tank. CONSTITUTION:A hot water storing tank 12 and a floating heat insulator 18 which is spread floatingly over a surface 16 of hot water stored in a hot water tank and can cover substantially all of the hot water surface 16 are provided. Thus heat radiation from the hot water surface 16 is prevented by the floating heat insulator 18, and thereby the temperature of the hot water can be kept high for a long time. By this, the hot water can be supplied while its temperature is kept high.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage tank device.

[0002]

2. Description of the Related Art In recent years, hot water supply systems utilizing solar heat have become quite popular in Japanese houses, and a heat collector and a hot water storage tank connected to the heat collector are installed on the roof surface to collect daytime solar heat. The hot water heated while collecting heat in the hot water tank is convectively circulated to the stored water in the hot water storage tank to warm the hot water in the hot water storage tank to a high temperature and store it, or supply water from the ground to the hot water collector. Meanwhile, the warm water that has been heated is sequentially stored in storage tanks on the ground. Further, in an electric water heater that uses surplus power at night, the stored water supplied to a hot water storage tank installed on the ground or the like is warmed and stored by Joule heat of inexpensive surplus power at night. Hot water stored in a hot water storage tank installed on the roof surface or on the ground is supplied to a kitchen, a bathroom, a washroom or the like.

[0003]

However, the hot water storage tank of the solar water heater or the electric water heater has a capacity of about 200 to 400 liters in order to prevent heat radiation from the outer peripheral surface of the tank during winter or night. Although covered with a heat insulating material, the hot water storage tank is an open type tank that communicates with an air vent pipe for venting the internal air when supplying water, so heat is radiated to the outside from the hot water surface via the air vent pipe. However, there is a problem in that the temperature of the stored high-temperature hot water tends to drop during the winter and at night, and the high temperature required for hot water supply cannot be maintained.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a floating heat insulator capable of covering the entire stored hot water surface in a hot water storage tank. Even if the air is connected to the outside via an air vent pipe, the floating heat insulator can prevent the heat radiation from the hot water surface and keep the temperature of the hot water in the hot water tank high for a long time while maintaining the kitchen or bathroom. , To provide a hot water storage tank device capable of supplying hot water to a washroom or the like.

[0005]

In order to achieve the above object, the present invention provides a hot water storage tank 12 and a hot water storage tank 1.
The hot water storage tank device 10 is provided with a plurality of floating heat insulators 18 that are floated and deployed on the hot water surface 16 stored in the inside 2 and can cover the entire hot water surface 16 substantially.

The floating heat insulator 18 may be composed of chip-like floating pieces 36 floating-bonded to each other, and may be made of a material having a specific gravity of 1 or less and a heat insulating property.

The floating piece 36 may be formed in a substantially square shape.

Further, the floating piece 36 may be formed to have a substantially elliptical cross section.

[0009]

The hot water storage tank device according to the present invention comprises a plurality of floating heat insulators that cover the entire hot water surface stored in the hot water storage tank, and the entire surface of the hot water heated to a high temperature floats. The cover is covered with a heat insulator to prevent heat radiation from the surface of hot water. Therefore, even if the outside air temperature drops rapidly at night or in the winter, the temperature of the hot water in the hot water storage tank that is in communication with the outside through the air vent pipe etc. does not drop, and the hot water is kept at a high temperature while maintaining the kitchen or bathroom. It will be possible to supply hot water to the bathroom.

[0010]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show a hot water storage tank device 10 according to an embodiment of the present invention. As is clear from the figure, the hot water storage tank device 10 is floated and deployed on the hot water storage tank 12 and the hot water surface 16 of the hot water 14 stored in the hot water storage tank 12, and a plurality of hot water surfaces 16 that can cover the entire hot water surface 16 can be covered. The floating heat insulator 18 is provided.

In the figure, the hot water storage tank 12 is shown as an example of an open type tank body for a solar water heater, which is made of hard synthetic resin, corrosion resistant light metal or the like and formed in a horizontal cylindrical shape. The hot water storage tank body 12 has an automatic water supply tank 20 arranged at one end side thereof, and a water passage 22 hung from the automatic water supply pipe 20 communicates with a position below the end portion of the hot water storage tank 12. On the side of the automatic water supply tank 20, an air vent pipe 24 is communicated from a position above the end of the hot water storage tank 12 to a position above the automatic water supply tank 20.

The lower surface of the hot water storage tank 12 has two communication ports 26, 26 for communicating with a heat collector (not shown).
A hot water supply port 28 for supplying hot water to the outside is provided at an intermediate position on the other end side of the hot water storage tank 12, a water supply port 30 is connected to the automatic water supply tank 20, and the outer periphery of the hot water storage tank 12 is further provided. Insulation material 32 such as foam material on the surface
Is attached. Further, the automatic water supply tank 12 is communicated with an air vent hole 34 penetrating the heat insulating material 32.

The hot water storage tank 12 is installed on the roof of a house so that the communication ports 26, 26 communicate with the heat collector, and the water supply pipe 30 communicates with the water supply port 30 of the automatic water supply tank 12 so that the hot water storage tank 12 has the same structure. The water is automatically supplied, and the supplied water is accumulated and circulated in the heat collector that is heated by the irradiation of solar heat in the daytime.
The temperature of the hot water is heated to about 80 ° C. in summer and about 40 ° C. in winter.

On the hot water surface 16 of the hot water 14 in the hot water storage tank 12, a plurality of floating heat insulators 18 are floatingly deployed so as to cover substantially the entire hot water surface 16, so that the hot water surface 1
6 can prevent heat radiation to the outside communicated with the air pipe 24, the air vent hole 34, etc., and can keep the temperature of hot water at a high temperature even in the cold winter.

Further, the floating heat insulator 18 has a structure as shown in FIGS.
As shown in Fig. 2, it is composed of floating pieces 36 in the form of chips that are floating-bonded, and has a specific gravity of 1 or less, such as polyvinyl chloride,
It is made of a material having a heat insulating property. Since a material having a specific gravity close to 1 is settled and floated in warm water, a specific gravity of 0.5 or less is preferable, and the floating piece 36 accurately floats on the hot water surface to block hot water and air, and Due to the heat insulating property, the amount of heat conducted and radiated to the floating piece 36 is also small.

It is preferable that the floating piece 36 has a substantially square shape, and that a portion thereof submerged in water has a curved surface of a ship bottom shape. For example, by forming it into a square, a rectangle, or the like, as shown in FIG. 3, there is no gap between the joint edges, and they can be closely joined to prevent heat radiation from the hot water surface 16. In addition, as shown in FIGS. 4 and 5, in the embodiment, the cross section is formed into a substantially elliptical shape, and a curved surface is provided in the submerged portion. As a result, the hot water storage tank 1
The area of the warm water surface changes depending on the water level in 2, and, for example, when the water level rises and the area becomes narrower, as shown in FIG. 2, the floating piece 36 has its edge along the elliptical surface. Can easily adapt to a small area while overlapping. Further, when the hot water surface widens from a narrow state to a wide state due to a change in the water level, the edges overlapping with each other along the elliptical surface slide and automatically expand to cover the hot water surface 16. It can be closed in a shape to prevent heat radiation.

Further, FIG. 6 shows a hot water storage tank device 10 of another embodiment. In the figure, the hot water storage tank 12
Is a vertical tank body installed on the ground. An air vent pipe 24 and a hot water supply pipe 38 are connected to the upper surface of the hot water storage tank 12, and a hot water supply pipe 4 is provided at a lower position of the hot water storage tank 12.
0 is communicated, and the heat insulating material 32 is provided on the outer peripheral surface of the hot water storage tank 12.
Are covered. Further, a plurality of floating heat insulators 18 are floatingly deployed so as to cover the entire hot water surface 16 of the hot water 14 stored in the hot water storage tank 12.

In the hot water storage tank device 10 of the above-described embodiment, hot water heated by, for example, solar heat or Joule heat of electric power is stored in the hot water storage tank 12 from the hot water supply pipe 38 while passing through the hot water supply pipe 40. Then, hot water is supplied to the kitchen, bathroom, and washroom in the room. Since the floating heat insulator 18 is floatingly deployed like a cover on the hot water surface 16 of the hot water 14 stored inside, even if the external temperature decreases during the winter or night, the hot water stored in the outside via the air vent pipe 24 Hot water 1 in tank 12
No. 4 can prevent the heat radiation to the outside, and the stored hot water can be kept at a high temperature even in winter or at night.

As described above, according to the present invention, a plurality of floating heat insulators 18 for covering the entire hot water surface are provided in the open type hot water storage tank 12 which is communicated with the outside by the air vent pipe or the like. The warm water surface 16 of the warm water 14 heated to the temperature can be shielded from the outside by the floating heat insulator 18, and even if the outside air rapidly decreases at night or in the winter, the temperature of the warm water stored does not decrease, and the temperature of the warm water does not decrease. Therefore, it is possible to perform suitable hot water supply while maintaining a high temperature for a long time.

As the hot water storage tank device 10 of the present invention, an embodiment of a solar water heater has been illustrated, but the hot water storage tank device 10 is not limited to this, and can be applied to various open hot water storage tanks that are communicated with the outside by an air vent pipe or the like. By doing so, the hot water can be kept at a high temperature for a long time.

[0021]

As described above, according to the hot water storage tank device of the first aspect, the hot water storage tank and the hot water surface stored in the hot water storage tank can be floated and deployed to cover substantially the entire hot water surface. By including the floating heat insulator, heat radiation from the surface of the hot water stored in the hot water storage tank can be prevented, and hot water can be supplied while maintaining the high temperature of the hot water in the hot water storage tank for a long time.

According to a second aspect of the present invention, the floating heat insulator is composed of chip-like floating pieces that are floating-bonded to each other, and is made of a material having a specific gravity of 1 or less and a heat insulating property. , It is possible to prevent the temperature drop of the hot water by accurately blocking the heat radiation of the hot water while floating and spreading on the surface of the hot water in the hot water storage tank.

According to claim 3, the floating piece is
Since the floating pieces are formed in a substantially square shape, the floating pieces floating on the hot water surface are tightly joined to each other, and no gap is generated at the joining portions, so that the temperature drop of the hot water can be prevented.

According to a fourth aspect, the floating piece is
Since the floating pieces that are formed into a substantially elliptical cross-section are closely joined, the edges of the floating pieces overlap with each other when the hot water surface contracts due to changes in water level, and when the hot water surface widens, they overlap. The floating pieces can prevent the temperature drop of the hot water by spreading the floating state from the superposed state to the joined state and constantly shielding the hot water surface.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a hot water storage tank device according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is a partial plan view showing a floating heat insulator floatingly deployed inside a hot water storage tank 12.

FIG. 4 is an enlarged perspective view of a chip-shaped floating piece.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a sectional view of a hot water storage tank device according to another embodiment.

[Explanation of symbols]

 10 Hot Water Storage Tank Device 12 Hot Water Storage Tank 14 Hot Water 16 Hot Water Surface 18 Floating Heat Insulator 36 Floating Piece

Claims (4)

[Claims] 1. A hot water storage tank device comprising: a hot water storage tank; and a floating heat insulator that is floated and deployed on a hot water surface stored in the hot water storage tank and can cover substantially the entire hot water surface. 2. The hot water storage tank device according to claim 1, wherein the floating heat insulator is composed of chip-shaped floating pieces that are floatingly joined to each other, and is made of a material having a specific gravity of 1 or less and having heat insulating properties. 3. The hot water storage tank device according to claim 2, wherein the floating piece is formed in a substantially square shape. 4. The hot water storage tank device according to claim 2, wherein the floating piece is formed to have a substantially elliptical cross section.