JPH0642823A - Hot water supplying system utilizing solar heat - Google Patents

Abstract

PURPOSE:To provide a hot water supplying system utilizing solar heat of energy saving type in which hot water of predetermined temperature can always be supplied to a supplying side. CONSTITUTION:Thermal medium absorbing solar heat through a solar heat collector 1 is circulated in heat exchangers 4 and 5 of hot water storing tanks 2 and 3 of more than two units. Then, the thermal medium of which heat is absorbed is circulated in sequence in the heat exchangers 4 and 5 within a plurality of hot water storing tanks 2 and 3 under a cycle of every other day and then hot water is supplied in sequence from the hot water storing tanks 2 and 3 having hot water of predetermined temperature stored therein to the supplying side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply system using solar heat in which hot water is stored in a hot water storage tank by using a solar heat collector.

[0002]

2. Description of the Related Art In recent years, a hot water supply system using a solar heat collector installed on a roof has become widespread in general houses, and the power consumption at home has been reduced. The system described above allows a heat medium circulating inside the solar heat collector to absorb solar heat, and causes the heat medium to circulate through a heat exchanger arranged in a single hot water storage tank in which water is stored. Is a system that stores the hot water as hot water and supplies the hot water as a heat source for hot water supply or an air conditioner.

[0003]

However, in the above system, the function of raising the temperature of water using the solar heat collector and the supply of hot water to the supply side (hot water supply device or air conditioner) are provided as a single hot water storage tank. Therefore, if the amount of solar radiation during the daytime is small and the hot water in the hot water tank does not rise to the specified temperature, the hot water supply to the supply side must be interrupted, which is efficient. It wasn't a working system.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an energy-saving hot water supply system that can always supply hot water of a predetermined temperature to the supply side. To do.

[0005]

A hot water supply system utilizing solar heat according to the present invention comprises a solar heat collector for absorbing solar heat in a heat medium circulated therein, and a heat exchanger arranged inside a tank, and having a predetermined amount. It is installed in two or more hot water storage tanks in which supply water is stored, a solar heat collector, and a heat medium circulation pipe connected between the heat exchangers of the respective hot water storage tanks. Heat medium switching valves that circulate the heat medium that has absorbed heat from the solar heat collector, and the hot water tanks that are installed in each hot water storage tank, and the hot water stored in the predetermined hot water storage tank is supplied to the supply side of the hot water supply device, air conditioner, etc. By the supply switching valve and the alternate-day cycle, the heat medium that has sequentially absorbed heat in the multiple hot water storage tanks circulates through the heat exchanger inside the hot water storage tanks, and the hot water storage tanks that store hot water of a predetermined temperature are supplied sequentially. As the hot water to the side is supplied, it is characterized in that a controller that performs switching control of the heating medium selector valves and supply switching valve is provided.

[0006]

According to the hot water supply system using solar heat of the present invention, a solar heat collector that absorbs solar heat into the heat medium circulating inside the apparatus and a heat exchanger are arranged inside the tank.
And two or more hot water storage tanks that store a predetermined amount of supply water,
A heat medium switching valve that is provided in the heat medium circulation pipe connected between the solar heat collector and the heat exchanger of each hot water storage tank and circulates the heat medium absorbed from the solar heat collector to the predetermined hot water storage tank by a related switching operation. , A supply switching valve that is provided in each hot water storage tank and that supplies hot water stored in a predetermined hot water storage tank to the supply side of a hot water supply device or an air conditioner by a related switching operation, and a plurality of hot water storage tanks by alternate days The heat medium switching valve and the supply medium are so arranged that the heat medium that has sequentially absorbed heat circulates through the heat exchanger inside the tank, and that hot water is sequentially supplied to the supply side from the hot water tank that stores hot water of a predetermined temperature. Since it is equipped with a controller that controls the switching of the switching valve, the solar heat collector is used in a predetermined hot water storage tank in a day cycle to raise the temperature of the water in the tank to a predetermined temperature, and then the other storage tanks are heated. The day before it is possible to supply hot water which is heated to a predetermined temperature to the supply side in the bath, there is no trouble such hot water as in the prior art the use of the supply-side without heating is interrupted.

[0007]

EXAMPLE An example of a hot water supply system using solar heat according to the present invention will be described with reference to FIG. Reference numeral 1 in the figure is a solar heat collector mounted on the roof of the house. Inside the solar cell collector 1, a heat absorption pipe 1
a is disposed, and a heat medium that absorbs solar heat circulates inside the heat absorption pipe 1a.

In addition, two hot water storage tanks (first
The hot water storage tank 2 and the second hot water storage tank 3) are installed. Inside the first and second hot water storage tanks 2 and 3, heat exchangers 4 and 5 are arranged. Further, the first and second hot water storage tanks 2 and 3 are respectively supplied with a predetermined amount of water from a water supply pipe 6, and the hot water is supplied from the supply pipes 7 and 8 to a supply side 9 such as a hot water supply device or an air conditioner. Hot water in the tanks 2 and 3 is supplied. Here, the supply pipes 7 and 8 are converged on the main supply pipe 11 by the supply switching valve 10. The supply switching valve 10 includes a controller 12 described later.
It is possible to switch operation by remote control. It should be noted that the first and second hot water storage tanks 2 and 3 are provided with heaters 18 and 19 that raise the temperature of hot water inside the tanks by using midnight power.

First heat medium circulation pipes 13a and 13b connected to the heat exchanger 4 of the first hot water storage tank 2 are connected to the outward path and the return path of the heat absorption pipe 1a. A heat medium circulation pump 14 is provided in the first heat medium circulation pipe 13a. Further, the heat medium switching valves 15 and 16 are connected in series to the first heat medium circulating pipes 13a and 13b, and the second heat medium circulating pipes 17a and 17a are connected to the heat medium switching valves 15 and 16, respectively. One end of 17b is connected, and the other end is connected to the heat exchanger 5 of the second hot water storage tank 3. By operating the heat medium switching valves 15 and 16, the heat medium circulated from the solar heat collector 1 passes through the first heat medium circulation pipes 13a and 13b or the second heat medium pipes 17a and 17b. And is circulated to the heat exchangers 4, 5 of the first hot water storage tank 2 or the second hot water storage tank 3. Here, the heat medium switching valves 15 and 16
Is connected to the controller 12 so that the switching operation can be performed by remote control.

The controller 12 performs a switching operation of the heat medium switching valves 15 and 16 and the supply switching valve 10 in alternate cycles by a timer function. The specific control method of the controller 12 is based on the heat medium switching valve 1
5, 16 and the switching operation of the supply switching valve 10 and the usage states of the first and second hot water storage tanks 2 and 3 will be described.

First, in the first hot water storage tank 2, the heat medium circulated from the solar heat collector 1 on the previous day stores water in the tank, and hot water which can be used as a hot water source or a heat source for an air conditioner is stored. Water is supplied to the second hot water storage tank 3 through the water supply pipe 6 up to a predetermined volume. Then, by remote control of the controller 12, the first hot water tank 2 side of the supply switching valve 10 is opened, and the heat medium switching valve 15 is opened.
The second hot water storage tank 3 side is opened and the second heat medium switching valve 16
Open the hot water storage tank 3 side.

As a result, the heat medium which has absorbed the solar heat in the solar heat collector 1 is operated by the heat medium circulation pump 14, and the heat medium switching valve 15, the second heat medium circulation pipe 17a,
The heat exchanger 5, the second heat medium circulation pipe 17b, the heat medium switching valve 16, and the solar heat collector 1 circulate in the normal path. Then, the water in the second hot water storage tank 3 is heat-exchanged with the heat exchanger 5, and is heated to warm water having a predetermined temperature in one day cycle.
The hot water in the first hot water storage tank 2 is used as hot water for the hot water supply and the air conditioner for one day.

Then, on the next day, as described above, the hot water which can be used as the hot water supply or the heat source of the air conditioner has already been stored in the second hot water storage tank 3 as described above. A predetermined amount of water is supplied from the water supply pipe 6. Then, by the remote operation of the controller 12, the second hot water tank 3 side of the supply switching valve 10 is opened, and the heat medium switching valve 15 is opened.
The first hot water storage tank 2 side is opened and the second heat medium switching valve 16
Open the hot water storage tank 3 side.

As a result, the heat medium that has absorbed the solar heat in the solar heat collector 1 is exchanged between the water in the second hot water storage tank 3 and the heat exchanger 5 by the operation of the heat medium circulation pump 14. It is stored as warm water at a predetermined temperature in a day cycle. The warm water in the first hot water storage tank is used as a heat source for hot water supply and an air conditioner for one day.

As can be easily understood from the above, the heat medium switching valve 1 controlled by the controller 12
5, 16 and the switching operation of the supply switching valve 10, the inside of the two hot water storage tanks 2 and 3 in the alternate heat cycle is absorbed by the solar heat collector 1 in one hot water storage tank 2 (or 3). It is possible to raise the temperature of the water to a predetermined temperature in one day cycle and always supply it to the supply side 9 in the other hot water storage tank 3 (or 2). There is no problem such as interruption of use for
The solar heat can be fully utilized to operate the system in an energy-saving manner. In this embodiment, 2
The system provided with the hot water storage tank has been described, but by providing more hot water storage tanks, further energy saving can be achieved.

[0016]

As described above, in the hot water supply system utilizing solar heat of the present invention, the solar heat collector for absorbing the solar heat into the heat medium circulating inside the apparatus, and the heat exchanger arranged inside the tank, Moreover, it is provided in two or more hot water storage tanks in which a predetermined amount of supply water is stored and in the heat medium circulation pipe connected between the solar heat collector and the heat exchanger of each hot water storage tank. Heat medium switching valves that circulate the heat medium that has absorbed heat from the solar heat collector in the hot water storage tank, and the hot water stored in the predetermined hot water storage tank by the related switching operation provided in each hot water storage tank The supply switching valve that supplies to the supply side, and the heat medium that has sequentially absorbed heat in the plurality of hot water storage tanks every other day cycle circulates through the heat exchanger inside the tank, and is a hot water storage tank that stores hot water at a predetermined temperature. Since a controller for switching control of the heat medium switching valve and the supply switching valve is provided so that hot water is sequentially supplied to the supply side, a solar heat collector is used in a predetermined hot water storage tank in one day cycle. It is possible to raise the temperature of the water inside the tank to a specified temperature, and then supply the hot water that has been raised to the specified temperature in the other hot water storage tank to the supply side on the previous day without increasing the temperature of the hot water as in the past. It is possible to operate the system in an energy-saving manner by fully utilizing the solar heat without any trouble such as interruption of the utilization of the solar energy.
Further, a heat source obtained from nighttime electric power can be provided as a backup device in the two or more hot water storage tanks used in the system of the present invention, whereby a more energy-saving system can be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an air conditioning system using a solar cell of the present invention.

[Explanation of symbols]

 1 Solar Heat Collector 2 First Hot Water Storage Tank (Hot Water Storage Tank) 3 Second Hot Water Storage Tank (Hot Water Storage Tank) 4, 5 Heat Exchanger 9 Supply Side 10 Supply Switching Valve 12 Controller 15, 16 Heat Medium Switching Valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masato Iijima 2-4-5 Takaidohigashi, Suginami-ku, Tokyo Misawa Homes Co., Ltd.

Claims (1)

[Claims] 1. A solar heat collector that absorbs solar heat into a heat medium circulating inside the apparatus, and a hot water storage tank having two or more tanks in which a heat exchanger is arranged inside the tank and a predetermined amount of supply water is stored. A heat medium switching valve that is provided in the heat medium circulation pipe connected between the solar heat collector and the heat exchanger of each hot water storage tank, and circulates the heat medium absorbed from the solar heat collector in the predetermined hot water storage tank by a related switching operation. And a supply switching valve that is provided in each hot water storage tank and supplies the hot water stored in a predetermined hot water storage tank to the supply side of a hot water supply device, an air conditioner, etc. by a related switching operation. The heat medium switching valve is configured so that the heat medium that has sequentially absorbed heat in the hot water storage tank circulates to the heat exchanger inside the tank and that hot water is sequentially supplied from the hot water storage tank that stores hot water of a predetermined temperature to the supply side. as well as Hot water supply system using solar heat, characterized in that the controller controls switching of the supply for the switching valve is provided.