JPH0378558B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat storage tank for storing a heat medium such as water for heating or cooling buildings, factories, etc.

[Problem that the invention seeks to solve]

Buildings and other structures are equipped with heat storage tanks that store heat medium such as water for heating and cooling mainly due to economic reasons. In many cases, this heat storage tank utilizes the space within a double underground slab, and is configured to communicate between a plurality of tanks separated by underground beams using communication pipes passing through the underground beams.

However, simply connecting the tanks with a communication pipe will not work.
Water of different temperatures can easily mix in the tank.
The stored heat cannot be used effectively. In order to utilize heat effectively, it is necessary to provide special means in the communication pipe to prevent water of different temperatures from mixing in the tank and to form temperature stratification. However, because heat storage tanks often use cold water in the summer and hot water in the winter, it was necessary to reverse the flow of water in the heat storage tank in summer and winter, and the piping around the heat storage tank had to be changed. . This piping was complicated, resulting in increased equipment costs and the hassle of switching valves.

This invention has been made in view of the above-mentioned problems. The purpose is to propose a heat storage tank with simple piping, simple switching operations, formation of temperature stratification, and high heat storage utilization efficiency.

[Means for solving problems]

This heat storage tank consists of a plurality of tanks connected in series through communication pipes, and at the ends of the communication pipes and the circuit pipes connected to the primary and secondary heat exchanger systems, there are two tanks that open to the upper and lower layers of the tanks, respectively. It has two openings.
In the two openings, only one of the upper and lower layers is opened, and between the two tanks, the upper and lower layers are opened in different combinations.

This will be explained below with reference to the embodiments shown in the drawings.

In FIG. 1, a heat storage tank 1 has four tanks 2-1, 2-2, 2-3, and 2-4 arranged in series, and the tanks are communicated through a communication pipe 3. A primary pump 4, a primary heat exchanger 5, a secondary pump 6, and a secondary exchanger 7 are arranged outside the tank. A circuit is formed by a secondary circuit pipe 8 and a secondary circuit pipe 9. The ends of the communication pipe 3 and circuit pipe communicating with one tank have two openings 10 and 11 extending to the upper and lower layers of the tank.
has. Only one of these two openings 10 and 11 has means for opening.

FIG. 3 shows upper and lower openings 10 and 11 provided at the ends of the communication pipe 3 that passes between the two tanks 2 and 2. The upper layer opening 10 has a cylindrical shape and stands up, and a sliding tube is loosely fitted inside, and the upper lid 1 is placed on top of it with a gap maintained.
3. A floating body 14 is attached. Lower layer opening 11
A lower cover 15 is disposed on the lower surface of the apparatus, and a connecting rod 17 which is long in the vertical direction and has a presser ring 16 attached to the upper end is connected to the edge of the lower cover 15. The connecting rod 17 has locking nuts 18 and 19 installed in the middle, and the height can be fixed by locking the locking nuts into a locking hole 20 provided at the edge of the upper layer opening 10. That is, as in the tank 2 on the right, the lower locking nut 18
When the floating body 1 is locked in the locking hole 20, the lower cover 15 closes the opening 11, and the retaining ring 16 at the upper end holds the floating body 1.
4, the floating body 14 floats together with the upper cover 13, and the opening 10 opens. Also, the upper locking nut 1
9 is locked in the locking hole 20, the presser ring 16
presses down the floating body 14, and the upper lid 13 closes the opening 1.
0 is closed, and the lower lid 15 is lowered to open the opening 1.
1 is open. According to this means, only one of the openings 10 and 11 in the upper and lower layers can be opened. Similarly, as shown in FIG. 4, the openings 10 and 11 in the upper and lower layers provided at the end of the circuit tube 8 or 9 communicating with the tanks 2-1 and 2-4 are opened when the upper cover 13 or the lower cover 15 is opened. Only one opening is open.

Figure 1 shows the operating status of the heat storage tank during summer cooling. The water 21 in the heat storage tank is cooled at night by a refrigerator corresponding to the primary heat exchanger 5, and then passed through the circuit pipe 8 to the tank 2-
Supply to 1. At this time, only the opening 11 in the lower layer is left open at the end of the circuit tube 8, and low-temperature cold water is poured into the tank 2.
Send it to the lower layer of 1. In addition, low-temperature cold water is stored from below, displacing high-temperature cold water in the tank due to the difference in density. The cold water filling the tank 2-1 flows out to the tank 2-2 via the communication pipe 3. At this time tank 2
The upper layer opening 10 is opened on the -1 side, the lower layer opening 11 is left open on the tank 2-2 side, and the cold water in the upper layer of the tank 2-1 is sent to the lower layer of the tank 2-2. This is repeated to form temperature stratification between the tanks and between the upper and lower layers of the tanks in the tanks 2-1 to 2-4, thereby storing cold water.

During daytime air conditioning, the cold water stored in this heat storage tank is pumped up from the tank 2-1 through the opening 11 in the lower layer to the secondary circuit pipe 9, and transferred to the secondary heat exchanger 7 by the secondary pump 6. Supplies air conditioners. The cold water heated through the air conditioner is sent into the tank 2-4 through an opening 10 opened in the upper layer. The high-temperature cold water is stored by displacing the low-temperature cold water from the top of the tank. The high temperature cold water filling the tank 2-4 flows out from the opening 11 in the lower layer via the opening 10 in the upper layer of the tank 2-3. The high-temperature cold water and the low-temperature cold water are kept in a state where they are difficult to mix in the tank and between the tanks, and the cooling is completed while maintaining temperature stratification.

Figure 2 shows the operating conditions during winter heating. In this case, the openings 10 and 11 in the upper and lower layers provided at the ends of the communication tube 3 and the circuit tube are opened and closed in the opposite manner to that in the case of cooling in FIG. 1. In other words, the high temperature hot water heated by the heating machine which is the primary heat exchanger 5 is transferred to the tank 2-1.
from the opening 10 in the upper layer. Tank 2-1
The high-temperature hot water filled with water passes through the communication pipe 3 from the opening 11 in the lower layer to the adjacent tank 2-2 through the opening 10 in the upper layer.
flows out from. This process is repeated to form temperature moldings in the four tanks and store hot water.

During heat dissipation, high-temperature hot water from the tank 2-1 is pumped up from the opening 10 in the upper layer and sent to the secondary pump 6 via the circuit pipe 9.
The heat is supplied to the air conditioner, which is the secondary heat exchanger 7.
The hot water that has cooled down through the air conditioner is returned to the tank 2-4 through the opening 11 in the lower layer, and is stored in the tank 2-4 by displacing high-temperature hot water in order from the lower layer. The low-temperature hot water filling the tank 2-4 flows out from the opening 10 in the upper layer to the adjacent tank 2-3 through the opening 11 in the lower layer.
By repeating this process, the low-temperature hot water is kept in a state where it is difficult to mix with the high-temperature hot water, and heat radiation is completed while maintaining temperature stratification.

[Effect]

This invention consists of the above configuration. This heat storage tank has a communication pipe 3 that connects a plurality of tanks in series, and 1
Next, the end of the circuit pipe communicating with the secondary heat exchanger has an opening that opens to the upper and lower layers of the tank, and only one of them has a means for opening. The opening is closed by the combination.

Therefore, switching from cooling operation to heating operation, or vice versa, can be achieved by reversing the openings of the upper and lower layer openings of the communication pipes and circuit pipes, which eliminates the conventional switching around the heat storage tank. No need for plumbing. In addition, thermal stratification is formed between the tanks and between the upper and lower layers of the tank, resulting in high heat utilization efficiency.

[Effect of idea]

As mentioned above, this heat storage tank has simple piping, simple switching operations, well-formed temperature stratification, and high heat utilization efficiency.

[Brief explanation of drawings]

Figures 1 and 2 are schematic diagrams showing the operating status of the heat storage tank during cooling and heating, and Figures 3 and 4 are vertical cross-sectional views of the communicating pipes arranged between the tanks and the ends of the circuit pipes communicating with the tanks. be. 1... Heat storage tank, 2... Tank, 3... Communication pipe, 4...
...Primary pump, 5...Primary heat exchanger, 6...Secondary pump, 7...Secondary heat exchanger, 8...Primary circuit pipe, 9...Secondary circuit pipe, 10...Upper layer opening, 1
DESCRIPTION OF SYMBOLS 1...Lower opening, 12...Sliding tube, 13...Upper lid, 14...Floating body, 15...Lower cover, 16...Pressure ring, 17...Connecting rod, 18, 19...Locking nut , 20...Locking hole, 21...Water.

Claims (1)

[Claims] 1. In a heat storage tank consisting of multiple tanks connected in series through communicating pipes, with temperature stratification formed between the tanks and between the upper and lower layers of the tank, the communicating pipes arranged between the two tanks and the primary and secondary heat The inner end of the circuit tube connected to the exchanger system has two openings that open to the upper and lower layers of the tank, and these two openings have means for only one of the upper and lower layers to open, A heat storage tank characterized in that an opening is formed between two tanks in different combinations of upper and lower layers.