JPS5818102Y2 - Heat storage tank for heating and cooling - Google Patents

Description

[Detailed description of the invention] This invention relates to a heat storage tank for air conditioning and heating that uses water used in the air conditioning system of a building, and in particular, the water flow in each small tank of the heat storage tank described in Japanese Patent Publication No. 4330355 is used to store heat. Regarding improvements to make it more effective.

Conventionally, as shown in FIGS. 1 and 2, this type of tank has partition walls 2 in the main body 1 of the heat storage tank, and a large number of small water tanks 3 □, 3 are arranged adjacent to each other. □.

33...3n are provided, and these small aquariums are connected by a communication passage 4 having openings 4a and 4b at the top for the small aquarium on the - side and at the bottom for the small aquarium on the other side. They are connected to each other, and low-temperature water is sent back from the bottom of the small tank 3□ at one side end, and high-temperature water is sent back from the top of the small tank 3□ at the other side end.

For example, when high-temperature water is sent to the small water tank 3° at the other side end, the high-temperature water is sequentially directed from the small water tank 3° to the low-temperature side small water tanks 33°, 32.31, and the communication passages 4.
flows through.

That is, as shown in FIG. 2, for example, the high-temperature water in the small water tank 3g on the other side flows from the opening 4b in the lower part of the small water tank 3g through the communication path 4, as shown by the arrow, from the opening 4a in the upper part of the small water tank 3f. The high-temperature water accumulates in the upper part of the small water tank 3r, and in the small water tank 3f, the buoyancy effect on the low-temperature water in the lower part and the flow caused by being sent in sequentially are balanced, forming a boundary between the lower low-temperature water and the thin intermediate temperature. The low-temperature water flows downward as a thermal extrusion flow while being separated by the layer, and the lower low-temperature water is caused to flow toward one side of the small water tank 3e at a lower temperature via the communication path 4.

In this way, water with different temperatures can be sequentially transferred from the starting small tank to the terminal small tank without mixing.

(For details, refer to Japanese Patent Publication No. 43-30355.) However, in the above-mentioned heat storage tank, if each of the small water tanks 3g, 3f, and 3e is flat as shown in Fig. 2, and the water surface height H cannot be set high, the heat storage Since the effective height H8 (the value obtained by subtracting the heights hl and h2 of the upper and lower openings 4a and 4b of the communication passage 4 from the water surface height H), the amount of heat stored per unit volume of the heat storage tank is reduced accordingly. This reduces the heat storage effect.

For this reason, in places where the water surface height H cannot be raised as described above, the width of each small tank should be reduced to <L' as shown in Figure 3, and the number of small tanks should be increased. The respective heights h1' and h of the upper and lower openings 4a and 4b of the communication path 4
The effective heat storage height H of each small water tank is minimized by reducing 2′.
6' to increase the amount of heat storage per unit volume. However, in such a case, if the flow rate of low-temperature water or high-temperature water is the same as that in Figure 2, each small The flow rate of water flowing between the water tanks 3g, 3f, and 3e becomes faster, and therefore, especially from the small water tank 3g on the other side to the communication path 4.
The high-temperature water flowing into the small water tank 3f from the upper opening 4a through the upper opening 4a travels straight near the water surface at a high flow velocity and flows straight through the bulkhead 2 on the opposite side.
It collides with the inner surface of the partition wall 2, descends along the inner surface of the partition wall 2, becomes a short-circuit flow A as shown by the arrow, and moves from the lower opening 4b on one side to the small water tank 3e on one side via the communication path 4. It ends up.

For this reason, a dead zone B with a very slow flow occurs at the other corner of the lower part of the small water tank 3f, and the effect of the above-mentioned pushing flow is impaired, and the water in the dead zone B is not used effectively. There was a drawback that the heat storage effect could not be improved compared to the volume ratio of the heat storage tank.

This idea was created in view of the above circumstances, and its purpose is to increase the effective heat storage height as much as possible as shown in Figure 3 when the water surface height cannot be raised very high as mentioned above. Even if the flow speed becomes faster, it is possible to prevent short-circuit flow and dead areas in each small tank, and to obtain a nearly perfect temperature stratified flow, making effective use of the water in the tank and improving the heat storage effect. Our aim is to provide something that will become a reality.

In other words, this idea involves installing a water flow deflecting plate of an appropriate width almost horizontally on the inner surface of the partition wall on the side opposite to the side where the upper part of the communication passage of the small aquarium opens, below the water surface and located slightly lower than the upper opening. As a result, the water flow deflection plate prevents the high-temperature water that has flowed into the small water tank from the upper opening of the communication path from hitting the inner surface of the partition wall on the opposite side and descending along the inner surface of the partition wall. The structure is such that the tank is stopped and then reversed to prevent short-circuit flow from occurring, thereby reducing the occurrence of dead areas and improving the heat storage effect by effectively utilizing the water in the tank. be.

An embodiment of this invention will be described below with reference to FIGS. 4 and 5.

FIG. 4 shows a part of the heat storage tank main body 11 of a heat storage tank constructed in the same manner as in FIG. All the small water tanks 13 from one side end to the other side end are connected to each other by a communication path 14, that is, through a partition wall 12, as in the conventional case. The small aquarium 13 on one side of the sandwiched water tank 13 has an opening 14a at the top, and the small aquarium 13 on the other side has an opening 14b at the bottom. Low-temperature water is sent back from the bottom (not shown), and high-temperature water is sent back from the top of the small water tank (not shown) on the other side.

In such a heat storage tank, the communication passage 14 of each small water tank 13
A water flow deflecting plate 15 is provided protruding from the inner surface of the partition wall 12 on the side opposite to the upper opening 14 a side.

This water flow deflecting plate 15 is a flat thin plate-like member, and has an appropriate width l (approximately 20 to 40 cm), and has a height below the water surface, that is, the upper opening 14a of the communication passage 14. It is located slightly lower than the height h1' and is provided in a substantially horizontal state.

In this heat storage tank, when low-temperature water is sent from the - side terminal section, it is substantially the same as in the conventional case, and there are almost no problems of short-circuit flow and dead zone generation.

Conversely, when high temperature water is sent from the upper part of the other side,
The high-temperature water advances near the water surface from the upper opening 14a side of the communication passage 14, collides with the inner surface of the partition wall 12 on the opposite side, and tries to descend along the inner surface of the partition wall 12, but the water surface on the inner surface of the partition wall 12 The receiver is stopped on a water flow deflection plate 15 that projects almost horizontally at a position slightly lower than the upper opening 14a below, and is prevented from descending along the partition wall 12, and is reversed as shown by the arrow in the figure. The high-temperature water is uniformly diffused throughout the upper part of the water tank 13, separated from the lower low-temperature water by a thin intermediate-temperature boundary layer, and moves downward as a thermal extrusion flow. The occurrence of short-circuit flows and dead areas will definitely be eliminated.

As described in detail above, this idea is based on the fact that the water flow deflecting plate is horizontally installed below the water surface on the inner surface of the partition wall on the side opposite to the upper opening side of the communication passage of the small aquarium, and at a position slightly lower than the upper opening. Even if the high-temperature water flowing into the small tank from the upper opening collides with the partition wall and tries to descend, it is blocked by the water flow deflection plate and is reversed and spread throughout the tank, so that the water surface height of the small tank can be reduced. Even when the flow velocity is set relatively high because the flow rate cannot be increased, it is possible to reliably prevent the short-circuit flow that occurs in the past, and at the same time easily eliminate the occurrence of dead areas, making it possible to effectively use water throughout the tank. It is extremely practical as it can be used to improve the heat storage effect.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view showing an example of a conventional heat storage tank for heating and cooling;
Fig. 2 is an enlarged sectional view of a portion of Fig. 1, Fig. 3 is an enlarged sectional view showing the occurrence of short-circuit flow and dead area, which are problems in the conventional example, and Fig. 4 is an example of an embodiment of this invention. FIG. 5 is an enlarged perspective view of a main part of the small water tank, and FIG. 6 is an enlarged sectional view of the main part. 12... Bulkhead, 13... Small water tank, 14
...Communication path, 14a...Top opening,
14b...Lower opening, 15...Water flow deflection plate, h...Appropriate height below the water surface, l...
Width of water flow deflection plate, A... Short circuit flow, B...
...Dead water area.

Claims (1)

[Scope of utility model registration request] A large number of small aquariums arranged adjacent to each other with a partition wall are connected in order through communicating passages in which the small aquarium on one side opens at the top and the small aquarium on the other side opens at the bottom. , and in a heat storage tank for heating and cooling, in which low-temperature water is sent or returned from the lower part of the small tank at one side end and high-temperature water is sent or returned from the upper part of the small tank at the other side, the communication path of the small tank is A heat storage tank for air conditioning and heating, characterized in that a water flow deflecting plate of an appropriate width is protruded almost horizontally from the inner surface of the partition wall on the side opposite to the side where the upper part opens, below the water surface and located slightly lower than the upper opening. .