JP2021127872A - Hot water supply system - Google Patents

Abstract

To provide a hot water supply system that can be used both for snow melting and hot water supply, and has no risk of damaging a pipe due to freezing during a winter season.SOLUTION: A hot water supply system 1 includes a heat exchange pipe 4 in which an antifreeze liquid circulates, a heat exchange panel 13 that is installed on a roof 12 and the like of a building and is arranged with the heat exchange pipe 4, and a heat storage tank 3 that stores water therein, is arranged with the heat exchange pipe 4 in a coil shape, and can exchange heat between the antifreeze liquid and water. The water in the heat storage tank 3 is circulated by a circulation pipe 7 between the heat storage tank 3 and an auxiliary boiler 6 heating the water in the circulation pipe 7. A three-way valve 16 is installed in the circulation pipe 7, and the circulation pipe 7 can be connected to a hot water supply pipe 10 for supplying hot water to a faucet 8 in a kitchen, a discharge port 9 of a bathtub, or a floor heater by switching.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hot water supply system in which, for example, a heat exchange panel provided outdoors such as a roof or a roof can be used as a snow melting facility, a hot water supply facility, or the like.

Traditionally, in heavy snowfall areas, the work of removing snow from the roof has been a heavy burden on local residents. Many proposals have been made to reduce the burden of snow removal work for local residents. For example, in the snow-melting device described in Patent Document 1, a snow-melting pipe is arranged on the roof, and hot water is supplied to the snow-melting pipe through groundwater, a solar water heater, or the like to erase the snow.
Further, in the roof snow removal system described in Patent Document 2, snow is melted by pumping hot water from a gas water heater through a hose to the roof and sprinkling water from a plurality of holes in the hose.

In the snow melting panel described in Patent Document 3, a snow melting panel in which a heat exchange pipe is arranged is installed on the roof, and the heat exchange pipe is circulated to a hot water supply device on the ground to melt hot water through the heat exchange pipe. It is supplied to the panel and the snow is melting. In addition, when snow is not melted by the hot water supply device, a water pipe is connected to the circulation path so that hot water from the heat exchange pipe stored by solar heat can be supplied to the bathtub or the like via an on-off valve.

JP-A-2019-143403 Utility Model Registration No. 3179520 Japanese Unexamined Patent Publication No. 2005-220672

However, in the equipment described in Patent Documents 1 to 3, when not in use in winter, the groundwater, hot water, etc. in the pipe are cooled and frozen, which may damage the pipe. Therefore, the groundwater, water, etc. I had to pull out. Moreover, it could not be used except in winter.
Further, in the solar hot water supply facility described in Patent Document 3, it is necessary to circulate water having a temperature exceeding 40 degrees in order to supply hot water to a bath or the like in winter, and more heat than necessary is given to snowmelt, so that a panel or the like is used. There is also a problem that the deterioration of the water heater is fast.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a hot water supply system that can be used for both snow melting and hot water supply and that does not damage the pipe due to freezing or the like in winter. do.

In the hot water supply system according to the present invention, a heat exchange pipe through which an antifreeze liquid flows, a heat exchange panel installed outdoors and a heat exchange pipe is arranged, and a heat exchange pipe in which water is stored and the heat exchange pipe is arranged are arranged. It is equipped with a heat storage tank that can exchange heat between the antifreeze liquid in the heat exchange pipe and the water, a circulation pipe that circulates the water in the heat storage tank, and an auxiliary boiler that heats the water in the circulation pipe. It is a feature.
According to the present invention, when it snows in winter or the like, water is heated by an auxiliary pipe, and heat is exchanged with the antifreeze liquid of the heat exchange pipe in the heat storage tank via the circulation pipe to raise the temperature of the antifreeze liquid to raise the temperature of the outdoor heat exchange panel. Can be used for snow melting. Moreover, since the antifreeze liquid is circulated in the heat exchange pipe, it is possible to prevent freezing even in winter. Further, the antifreeze liquid in the heat exchange pipe of the heat exchange panel that has become hot due to the heat of the sun is heat-exchanged with water in the heat storage tank, and the hot water can be used for hot water supply, heating, etc. through the circulation pipe.

Further, a switching valve provided in the circulation pipe and selectively supplying hot water to one of the hot water supply pipes connected to the heat storage tank and the hot water supply facility may be provided.
The water heated by the auxiliary boiler is sent to the hot water supply pipe by the switching valve and can be used for hot water supply and heating. Further, the antifreeze liquid in the heat exchange pipe of the heat exchange panel heated by solar heat is exchanged with water in the heat storage tank to become hot water, which can be used for hot water supply, heating, etc. through the hot water supply pipe from the switching valve.

Further, the heat exchange panel is selectively used for either a snowmelter or a heat collector.
In the present invention, the heat exchange panel can be used as a snowmelter for snowmelt in winter, and can be used as a heat collector for heating the antifreeze liquid to a high temperature by using sunlight except when it snows.

In addition, the heat exchange panel has heat exchange pipes arranged in a serpentine manner, and the ends of the heat exchange pipes are arranged in the stepped portion so that the heat exchange pipes can be connected to each other in the stepped portion of the heat exchange panel. May be good.
By connecting a plurality of heat exchange panels installed outdoors, it is possible to receive the heat of the sun and raise the temperature of the antifreeze to a higher temperature. Further, by exchanging heat with the water heated by the auxiliary boiler in the heat storage tank, the antifreeze liquid can be widely used for melting snow on roofs and the like.

In the hot water supply system according to the present invention, the antifreeze liquid can be circulated in the heat exchange pipe and heated through the heat storage tank by the circulation pipe circulated to and from the heat storage tank by the auxiliary boiler, and the antifreeze liquid does not freeze even in winter and the snow melts. Can be used for. In addition, since the antifreeze liquid in the heat exchange pipe can be heated by solar heat except when it snows, it can be used for hot water supply, heating, etc. by exchanging heat with water in the heat storage tank. Therefore, the heat exchange panel provided with the heat exchange pipe can be used for both the snowmelter and the solar heat collector.

It is explanatory drawing of the hot water supply system by embodiment of this invention. It is explanatory drawing of the heat exchange panel used for a heat collector.

Hereinafter, the hot water supply system 1 according to the embodiment of the present invention will be described with reference to the accompanying drawings.
In FIG. 1, the hot water supply system 1 according to the embodiment of the present invention is between a heat collector 2 installed outdoors such as the roof of a house or the roof of a building and a heat storage tank 3 installed on the ground or the floor, for example. A heat exchange pipe 4 is provided as a first circulation circuit A that circulates and transfers heat. Further, a circulation pipe 7 is provided as a second circulation circuit B that circulates and transfers heat between the heat storage tank 3 and the auxiliary boiler 6.
Further, the auxiliary boiler 6 has a faucet 8 for hot water supply in a kitchen in a house, a discharge port 9 for a bathtub in a bathroom, and a hot water supply pipe 10 as a hot water supply circuit C for supplying hot water to floor heating and the like. The hot water supply system 1 according to the present embodiment is composed of a combination of these three circuits.

The heat collector 2 is, for example, a heat exchange panel 13 installed on the roof 12 of a house, and the heat exchange panel 13 can also be used as a snow melter. In the heat exchange panel 13, for example, heat exchange pipes 4 made of copper pipes having high heat transfer properties are arranged in a bellows-folded manner, and the heat exchange pipes 4 in this portion are indicated by reference numerals 4a. As shown in FIG. 2, the heat exchange panel 13 has, for example, a substantially quadrangular plate shape, and stepped portions 14 are formed rotationally symmetrically on both side portions facing each other, and heat formed in a bellows fold shape on each stepped portion 14. Both ends of the exchange pipe 4 are formed so as to protrude from each other.

Then, by abutting the stepped portion 14 of the other heat exchange panel 13 with the stepped portion 14 of the heat exchange panel 13 forming a single unit and connecting the heat exchange pipes 4 to each other, the heat exchange pipe 4 becomes long in series. It becomes a connected configuration. The heat collector 2 (snowmelter) is configured by combining one or a plurality of heat exchange panels 13. The heat exchange pipe 4 is made of, for example, a copper pipe having a high heat transfer property.
The antifreeze liquid in the heat exchange pipe 4a, which has become hot due to the heat of sunlight, is conveyed to the heat storage tank 3 by the pump P. The antifreeze liquid in the heat exchange pipe 4b, which has been deprived of heat in the heat storage tank 3, is returned to the heat collector 2 and repeatedly converted to a high temperature.

The heat exchange panel 13 has a substantially quadrangular flat plate shape in a plan view, has a structure in which a black-painted stainless steel plate is covered with tempered glass, and is preferably sized so that it can be transported and installed manually. Inside the heat exchange panel 13, heat exchange pipes 4a are arranged in a bellows-fold shape, and antifreeze liquid flows through the heat exchange pipes 4a. Further, a heat exchange pipe 4 arranged in a coil shape or a spiral shape in the vertical direction is also provided in the heat storage tank 3, and the heat exchange pipe 4 in this portion is indicated by reference numeral 4b.

The heat exchange pipe 4 has a configuration in which each end exposed from both stepped portions 14 of the heat exchange pipe 4a in the heat exchange panel 13 and each end of the heat exchange pipe 4b in the heat storage tank 3 are connected. doing. Inside the heat storage tank 3, for example, tap water (hereinafter referred to as water) that circulates in the circulation pipe 7 is stored. A high-temperature antifreeze liquid passes through the inside of the heat exchange pipe 4b wound in a coil shape of a copper pipe in the heat storage tank 3 that stores water, and acts like an electric heater. Water can be boiled to make hot water.
Further, a water pipe is connected in the heat storage tank 3 so that tap water can be supplied at any time.

Similarly, the heat storage tank 3 and the auxiliary boiler 6 are connected by a circulation pipe 7 through which water flows, and the water heated by the auxiliary boiler 6 circulates through the circulation pipe 7 and is supplied into the heat storage tank 3 to generate heat. Heat is exchanged with the antifreeze liquid of the exchange pipe 4b. The water whose temperature has dropped due to heat exchange with the antifreeze circulates through the circulation pipe 7 and is returned to the auxiliary boiler 6. When the temperature of water is low due to cloudy weather, rain, snow, etc., it is heated by the auxiliary boiler 6 and supplied to the heat storage tank 3, the faucet 8 of the kitchen described later, the discharge port 9 of the bathtub, and the hot water supply equipment such as floor heating.
A three-way valve 16 is installed in the middle of the circulation pipe 7 for discharging the water heated by the auxiliary boiler 6. A circulation pipe 7 connected to the heat storage tank 3 is connected to one outlet of the three-way valve 16, and a hot water supply pipe 10 is connected to the other outlet. The hot water supply pipe 10 is connected to a faucet 8 for hot water supply in the kitchen and a discharge port 9 for a bathtub in a bathroom, and may be further connected to another faucet such as a washroom or floor heating equipment.

The hot water supply system 1 according to the present embodiment has the above-described configuration, and the usage method will be described next.
A heat exchange panel 13 is installed in a heat collector 2 installed outdoors such as on the roof 12 of a house or on the roof of a building, and a heat exchange pipe 4a arranged in the heat exchange panel 13 is used for sunlight. It is warmed by heat. The antifreeze liquid in the heat exchange pipe 4 that has become hot flows through the heat exchange pipe 4 by the pump P and is returned to the heat storage tank 3. Since the heat exchange pipe 4b is arranged in a coil shape in the heat storage tank 3, the high-temperature antifreeze liquid flows inside the heat storage tank 3 to act like an electric heater, and the heat causes the water in the heat storage tank 3 to flow. It is heated to a high temperature.

The antifreeze liquid that has been deprived of heat in the heat storage tank 3 is returned to the heat collector 2 through the heat exchange pipe 4, is heated again by sunlight, and is circulated to the heat storage tank 3. The high-temperature water that has been heat-exchanged with the antifreeze in the heat storage tank 3 flows through the circulation pipe 7. By connecting the circulation pipe 7 to the hot water supply pipe 10 by switching the three-way valve 16, the water in the heat storage tank 3 is treated as hot water, and the faucet 8 for hot water supply in the kitchen, the discharge port 9 for the bathtub in the bathroom, and the floor heating. Etc. are supplied. When the water in the circulation pipe 7 is consumed by the faucet 8 for hot water supply, the discharge port 9 for the bathtub, or the like, tap water corresponding to that amount is replenished to the heat storage tank 3.

Further, when hot water of about 42 ° C. is required in a bath or kitchen in cloudy weather or in winter, the antifreeze liquid in the heat exchange pipe 4 in the heat collector 2 cannot be heated to a high temperature, and the heat storage tank 3 The water inside does not get hot either. In this case, the water in the circulation pipe 7 is warmed by the auxiliary boiler 6 and sent to the hot water supply pipe 10 via the three-way valve 16. Also in this case, when the water in the circulation pipe 7 is consumed by the faucet 8 for hot water supply, the discharge port 9 for the bathtub, etc., tap water is replenished to the heat storage tank 3 and passed through the circulation pipe 7 to the auxiliary boiler 6. It is heated.

When it snows in winter or the like, the antifreeze liquid in the heat exchange pipe 4 that circulates between the heat exchange panel 13 and the heat storage tank 3 is cooled at a low temperature. In this case, the water heated by the auxiliary boiler 6 is supplied into the heat storage tank 3 via the circulation pipe 7 and circulated. Since tap water is heated in the heat storage tank 3, the antifreeze liquid in the heat exchange pipe 4b can be heat-exchanged and heated to, for example, 20 ° C. to 30 ° C. The heated antifreeze liquid is supplied to the heat exchange panel 13 in the heat collector 2 via the heat exchange pipe 4, and the snow accumulated due to the snowfall can be thawed. The antifreeze liquid in the heat exchange pipe 4 whose temperature has dropped by melting the snow is returned to the heat storage tank 3, and the heat is exchanged again with the tap water heated by the auxiliary boiler 6 to exchange heat in the heat collector 2. It is returned to the panel 13 and used for melting snow.

As described above, according to the hot water supply system 1 according to the present embodiment, the heat exchange pipes 4 for circulating the antifreeze liquid with the heat storage tank 3 are installed as the heat exchange panels 13 arranged in a bellows shape on the roof 12. When it snows, the antifreeze liquid can be heated in the heat storage tank 3 and melted in the heat exchange panel 13. Further, when it is used as a solar heat collector 2, it can be used for supplying hot water to a kitchen, a bathroom, or the like by heating an antifreeze liquid and exchanging heat in the heat storage tank 3.
The auxiliary boiler 6 can use the heated water in the circulation pipe 7 for heat exchange with the antifreeze liquid in the heat exchange pipe 4 in the heat storage tank 3 for melting snow. When hot water supply is required, the water heated by the auxiliary boiler 6 can be directly supplied to the hot water supply pipe 10 by switching the three-way valve 16.
Moreover, since the antifreeze liquid is circulated in the heat exchange pipe 4, it does not freeze even during winter snowfall and can be selectively used for either the heat collector 2 or the snow melter for supplying hot water by solar heat. It is convenient. In addition, there is no risk of damaging the heat exchange pipe 4 due to freezing or the like in winter.

Although the hot water supply system 1 according to the embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and appropriate changes and replacements can be made without departing from the spirit of the present invention. All of these are included in the present invention. Hereinafter, modifications of the present invention and the like will be described, but the description will be omitted by using the same reference numerals for the same or similar parts and members as those in the above-described embodiment.

In the above-described embodiment, the circulation pipe 7 is provided with a three-way valve 16 so that it can be switched to and connected to the hot water supply pipe 10 capable of supplying hot water to the kitchen or bathroom. However, the hot water supply pipe 10 capable of supplying hot water to the kitchen or bathroom is installed. You don't have to. In this case, the heat exchange panel 13 and the heat exchange pipe 4 of the heat collector 2 can be used for snow melting, and the antifreeze liquid in the heat exchange pipe 4 can be prevented from freezing even in winter.
Further, the three-way valve 16 is included in the switching valve.

1 Hot water supply system 2 Heat collector 3 Heat storage tanks 4, 4a, 4b Heat exchange pipe 6 Auxiliary boiler 7 Circulation pipe 8 Faucet 9 Discharge port 10 Hot water supply pipe 12 Roof 13 Heat exchange panel 16 Three-way valve

Claims (4)

A heat exchange pipe through which antifreeze flows inside,
A heat exchange panel installed outdoors and on which the heat exchange pipe is arranged,
A heat storage tank in which water is stored and the heat exchange pipe is arranged so that heat can be exchanged between the antifreeze liquid in the heat exchange pipe and the water.
A circulation pipe that circulates the water in the heat storage tank,
An auxiliary boiler that heats the water in the circulation pipe,
A hot water supply system characterized by being equipped with. The hot water supply according to claim 1, further comprising a switching valve provided in the circulation pipe and selectively supplying hot water to one of the hot water supply pipes connected to the heat storage tank and the hot water supply facility. system. The hot water supply system according to claim 1 or 2, wherein the heat exchange panel is selectively used for either a snowmelter or a heat collector. In the heat exchange panel, the heat exchange pipes are arranged in a serpentine manner, and the end portions of the heat exchange pipes are arranged in stepped portions. The hot water supply system according to any one of claims 1 to 3, which can be connected.

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