JP6241742B2 - Freezing prevention system in indoor warm air circulation type hot water storage tank. - Google Patents

Description

  The present invention relates to a system for preventing freezing in a hot water storage tank by circulating warm air in a building.

  Conventionally, in order to prevent freezing in the hot water storage tank, the use of energized heat generation, a heat pump system, or the like has been used, but there is no such thing that uses warming in the building interior as shown in the present invention.

Devices and systems that make hot water using solar heat have been used for some time. This is because a heat collection panel with a solar light receiving surface is installed on the roof of the building, and the liquid is circulated in this panel, and the heat of the circulating fluid heated thereby is introduced into the tank, and the water stored in the tank is stored. The water is exchanged with heat, and this water is converted into hot water and used as domestic water.
However, this depends on the weather, and the efficiency of solar heat utilization is reduced during rainy weather and at night. Therefore, a heating method such as a boiler is used together to compensate for this lack of heat. In particular, this amount of heating heat also increases during winter snowfall. In use in a general house, there is no hot water storage tank installation space when the boiler is installed indoors. Therefore, a hot water storage tank is often installed outdoors. However, the problem is the use in cold winter seasons.
In other words, in cold regions, it is normal for outdoor temperatures to be negative in winter, so the tank must be prevented from freezing. For this purpose, an electric heater or the like is used, resulting in an increase in running cost.
In view of the above, the present invention provides a new and useful means for heating the inside of a tank by circulating warm air from indoor heating and solar radiation in the vicinity of a hot water storage tank, thereby preventing freezing in the tank. It was invented for the purpose.

The present invention has the following configuration as means for solving the problems.
That is, a casing made of a heat-insulating hollow body installed outdoors is provided, a hot water storage tank is located in the casing at a distance from the casing inner surface to form a warm air passage by this gap, and the building room warm air is casing There are provided means for guiding to the inner warm air passage and means for discharging the warm air after passing through the warm air passage to the outside of the casing, and also has means for supplying water to the hot water storage tank and means for discharging and supplying hot water, and is heated by solar heat. And a heat exchange means for the hot water stored in the hot water storage tank. The present invention is an indoor warm air circulation type hot water storage tank freezing prevention system configured as described above.

The present invention has the following effects.
1. A hot water storage tank is provided in the heat insulating structure with a distance from the inner surface of the heat insulating structure, and indoor warm air is circulated in the gap, so that the temperature inside the hot water storage tank is prevented from falling and the tank freezes. Can be prevented.
2. Since the water supply pipe and the intake pipe are located in the warm air passage, a heating effect on both the pipes can be obtained.
3. By using a flexible tube for each pipe, it is possible to cope with a change in casing position due to freezing in winter.
4). Since the hot water storage tank can be installed outdoors with a certain distance, the building room can be used as an effective space.
5. Since warm air is discharged under the floor, freezing around the underwater can be prevented.
6). Since no electric heater is used, the running cost can be reduced.
7). The structure is simple and can be manufactured and provided at low cost.

  Mechanism explanatory diagram of the present invention   Explanatory drawing of essential parts of the present invention

Hereinafter, embodiments of the present invention will be described.
In the figure, reference numeral 1 denotes a solar heat collecting panel, which is a flat product made of a commercial product, and is installed on a roof of a building at a predetermined direction and angle. A circulation pipe 2 is connected to the inside of the heat collecting panel, and its inlet / outlet descends away from the panel and is led into a hot water storage tank described later.
A circulation pump 3 for liquid circulation is provided at an appropriate position of the circulation pipe.
Reference numeral 4 denotes a casing, which is a hollow cylindrical body, and a heat insulating material 5 made of foamed synthetic resin having a predetermined thickness is attached to the inner surface thereof. The upper part of the casing is detachably provided as a lid, and the lower part is appropriately fixed to the ground by a support member. 6 is a hot water storage tank made of a metal hollow cylinder, and its outer diameter is located with a little distance from the inner surface of the heat insulating material, and the upper and lower ends of the tank are located with a little distance from the heat insulating material. The lower end of the tank is appropriately fixed to the inner lower surface of the casing by a support member. A heat radiator 7 is a portion where the circulation pipe meanders in a planar manner, and is located below the hot water storage tank, and the heat radiator and the circulation pipe are connected to each other through liquid.

10 is a building wall, 11 is a building floor, and each part is provided through these.
An electric fan 12 is provided in a vent hole in the upper part of the indoor wall, and one end of a flexible warm air supply pipe 13 is attached to the vent hole, and the other end passes through the upper part of the casing and the heat insulating material to be ventilated. It has become. Reference numeral 14 denotes a warm air discharge pipe, which is a flexible pipe having one end penetrating the casing and the heat insulating material and the other end penetrating the building wall and opened under the floor.
Accordingly, the warm air in the room is lowered from the warm air supply pipe through the warm air passage 15 formed between the outer surface of the hot water storage tank and the inner surface of the heat insulating material to warm the hot water storage tank, and is discharged below the floor from the warm air discharge pipe.
Reference numeral 16 denotes a flexible water supply pipe for supplying tap water. This water supply pipe rises from the ground, passes through the warm air discharge pipe through a joint, and passes through the hot water storage tank wall for water connection.
Reference numeral 17 denotes a water tap. Reference numeral 18 denotes a flexible hot water pipe, one end of which passes through the warm air discharge pipe, rises in the warm air passage and passes through the upper end of the hot water storage tank, and the other end of the boiler 19 ( Commercial distribution product). Reference numeral 20 denotes a hot water supply pipe whose one end is in the boiler, and the other end is led to a hot water use place. Reference numeral 21 denotes a boiler exhaust pipe, which is led out of the building wall.
The above is one embodiment of the present invention.

Next, the use of the present invention will be described.
In using the present invention, first, the water tap is opened, water is supplied into the hot water storage tank through the water supply pipe, and the tank is filled with water. Moreover, let the boiler be in an operating state. This boiler is equipped with an electromagnetic valve and a thermostat to maintain an appropriate hot water temperature.
The fan at the top of the building interior wall is turned to send indoor warm air into the casing through the warm air supply pipe, and this warm air descends in the warm air passage and is exhausted below the floor through the warm air exhaust pipe. And heat exchange between the hot water storage tanks.
A solar heat collecting panel is connected to the hot water storage tank through a circulation pipe, and the pipe is connected to a radiator located below the hot water storage tank. Therefore, the circulating fluid heated by the solar heat collecting panel is circulated in the circulation pipe and the radiator by the circulation pump, and the heat storage tank is heated by the amount of heat radiated from the radiator. Can do. Even if it does not satisfy the required temperature as described above, it is further heated by boiler operation and can be used as hot water at an appropriate temperature.

The efficient use of solar heat is during sunshine during the daytime, and when it rains or at night, the use efficiency decreases or cannot be used. In the present invention, a heat insulating material is used in the casing, and a hot water storage tank is positioned inside the casing to reduce the influence of a decrease in the outside air temperature. With this method described above, the hot water storage tank is in a constant temperature environment, so that freezing in the tank can be prevented. In addition, each pipe uses a flexible tube, and can cope with a case where the casing position changes due to freezing.
Note that the fans used in the examples are assumed to operate for 24 hours, and warm air is always supplied into the casing. In addition, warm air is discharged under the floor, but it may be returned to the room. For example, a heat sensor and a switching valve may be used together to return to the room when the exhaust warm air is at the appropriate temperature, and to exhaust under the floor when the temperature is not appropriate. It may be configured.
During operation of the present invention, the water faucet is always kept open, and hot water is supplied from the upper end of the hot water storage tank to the boiler via the hot water take-up pipe. The water heated by the radiator convects upward in the tank due to the change in specific gravity, and the hot water flows to the boiler by preventing the temperature from falling due to heat exchange by supplying warm air. In this system, the water is further heated and hot water is supplied to the necessary place.

Although the present invention has been described above, the present invention is intended to prevent the hot water storage tank in the heat insulating structure from freezing in the cold in winter by maintaining a constant temperature environment by supplying warm air in the room.
Conventionally, in heat pump systems and electric water heaters, the amount of heat released by self-heating from the heat storage tank main body is large, and thus it has been possible to prevent freezing of indoor connected water supply facilities and the like by that heat release. However, with regard to the solar hot water supply system, when there was a shortage of sunshine in the winter, there was little heat generation from the heat storage tank, so there was no freezing prevention effect, and heat generation means by electric heat or the like was necessary to prevent this freezing. In addition, the boulder construction, which is often used as an inexpensive foundation, has disadvantages such as ground subsidence due to the weight of the hot water storage tank and ground vertical movement due to frost heaving in cold regions, etc. It has become. In order to cope with these, the heating means and the flexible tube described above are used. In recent years, the use of solar light has progressed, and many of them are solar power generation.
However, in terms of energy conversion efficiency, solar power generation is only about 15%.
On the other hand, the solar heat collecting system has a conversion efficiency of 60%, and its effective use is desired. However, there are problems such as freezing in cold districts. It provides an effective solution and provides an effective means from the energy conservation policy aspect.

DESCRIPTION OF SYMBOLS 1 Solar thermal collection panel 2 Circulation pipe 3 Circulation pump 4 Casing 5 Thermal insulation material 6 Hot water storage tank 7 Radiator 10 Building wall 11 Building floor 12 Fan 13 Warm air supply pipe 14 Warm air discharge pipe 15 Warm air passage 16 Water supply pipe 17 Water tap 18 Pipe 19 Boiler 20 Hot water supply pipe 21 Exhaust pipe

Claims (1)

A casing with a heat-insulating hollow body installed outdoors is provided, a hot water storage tank is located in the casing at a distance from the inner surface of the casing to form a warm air passage by this gap, and the building room warm air is used as an electric fan. And a means for discharging the warm air after passing through the warm air passage to the bottom of the building floor outside the casing using a warm air discharge pipe connected to the lower portion of the casing. A part of the pipe used for the water supply means and the hot water discharge / supply means is located in the warm air discharge pipe and the other part of the pipe passing through the warm air discharge pipe is The indoor warm air characterized by being located in the space under the building floor and having heat exchange means between heat from an external heat source and hot water in the hot water storage tank at the lower part of the hot water storage tank Passing type hot water storage tank antifreeze systems.

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