JPH0289996A - heat storage device - Google Patents

Abstract

PURPOSE:To accumulate heat with a substantially equal heat accumulating speed throughout the title device and accumulate the predetermined amount of heat by a method wherein the throwing-in ports of heat medium are provided at the most upstream side heat accumulating chamber and another heat accumulating chamber at more downstream side than the former while a discharging port, joining and discharging the heat mediums, is provided in the most downstream side heat accumulating chamber. CONSTITUTION:When the throwing ports 7, 15 are provided at the most upstream side first heat accumulating tank 11 and a third heat accumulating tank 13 at more downstream side than the first heat accumulating tank 11 and heat medium, circulated by a heat pump, is branched to throw it into the tanks, one part of the heat medium, which has flowed through the first heat accumulating tank 11 and a second heat accumulating tank 12, flows through the third heat accumulating tank 13 and a fourth heat accumulating tank 14 and is discharged from the most downstream side fourth heat accumulating tank 14. Accordingly, the other part of the heat medium, having much retaining amount of heat, can be joined with the heat medium of one part in the downstream side of the title device and, therefore, a heat medium temperature in the third heat accumulating tank 13 may be risen as compared with a case wherein the total amount of heat medium is made to flow from the most upstream side first heat accumulating tank 11 simply. Further, the flow amount of the heat medium in the third and fourth heat accumulating tanks may be secured so as to be the same as a case so far.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heat storage device used as a heat source for air conditioning together with a heat pump. The heat storage bodies are arranged side by side with their heat transfer surfaces along the flow direction of the heat medium to constitute a latent heat heat storage body group, and each of the plurality of latent heat heat storage body groups configured in this way is arranged in parallel with the flow direction of the heat medium. The present invention relates to a heat storage device arranged in a plurality of heat storage chambers partitioned by partition walls provided with a mechanism for allowing flow.

[Conventional technology]

When a heat pump is operated to store heat in this heat storage device, the heat medium circulating between the heat storage device and the heat pump is transferred from the first tank (11) to the second tank (11) as shown in FIG.
A configuration was adopted in which the liquid passed through a tank (12), a third tank (13), and was discharged from a fourth tank (14) on the most downstream side.

[Problem to be solved by the invention]

In this case, since the amount of heat retained by the heat medium in the heat storage tank on the most downstream side is inevitably reduced, a sufficient temperature difference between the latent heat storage material and the heat medium cannot be taken, and the heat storage tank on the downstream side The speed was slow.

Therefore, especially when the time required for heat storage is limited, such as when a heat pump is operated using nighttime electricity to store heat during the night, heat storage may not be completed.

On the other hand, in order to ensure a sufficient temperature difference between the latent heat storage material and the heat medium, as shown in Figure 5, separate heat medium inlets and outlets are provided for each tank, and the heat medium is inserted in parallel. Some systems allow reflux, but in this case, the heat medium is branched into each tank from the hedder pipe, so the absolute flow rate is inevitably insufficient, resulting in a decrease in the heat storage rate of the entire heat storage tank. As it turned out,
It wasn't a good thing.

[Means to solve the problem]

The characteristic structure of the present invention is that (1) an inlet for the heat medium is provided in the heat storage chamber on the most upstream side and in the heat storage chamber on the downstream side thereof, and (2) the heat medium input from the inlet is combined. The functions and effects are as follows.

[For production]

As shown in Figures 1 and 2, the heat medium inlets (7) and (15) are installed in the first heat storage tank (11) on the most upstream side and the third heat storage tank (13) on the downstream side. The heat medium circulating from the heat pump (1) is branched and input. Then, one of the heat mediums that passed through the first heat storage tank (11) and the second M heat tank (12) flows through the third heat storage tank (13) and the fourth heat storage tank (14), and then passes through the third heat storage tank (13) and the fourth heat storage tank (14), and then passes through the third heat storage tank (13) and the fourth heat storage tank (14). 4 is discharged from the heat storage tank (14).

Therefore, even on the downstream side, the other heat medium having a large amount of heat retention can be merged with the one heat medium, so that it is possible to simply merge the first heat storage tank (1
The temperature of the heat medium in the third S heat tank (13) can be increased compared to the case where the entire amount of heat medium is flowed from 1). Moreover, the flow rate of the heat medium in the third heat storage tank and the fourth heat storage tank can be maintained at the same amount as in the conventional case.

〔Effect of the invention〕

As a result, the flow rate decreases on the upstream side and the amount of heat exchange decreases, but the amount of heat exchange on the downstream side increases and all heat storage tanks store heat uniformly. Heat is evenly distributed to each heat storage tank, and the entire heat storage tank is stored at approximately the same heat storage rate, allowing latent heat storage with particularly high thermal conductivity on the downstream side, even during limited hours at night without increasing heat pump capacity. It is possible to store heat in a predetermined area without using materials.

〔Example〕

In FIG. 3, (10) indicates the heat storage tank of the heat storage device η that stores the latent heat associated with the change in color of the latent heat storage material, specifically the latent heat related to its solidification, and the heat storage tank (10) is partitioned vertically and horizontally. The first N heat tank (11) is divided into four by partition walls (17).
), second heat storage tank (12), third heat storage tank (13) and fourth heat storage tank
It consists of a heat storage tank (14). More specifically, the heat storage tank (lO) is a first heat storage tank (31) that is supplied with a heat medium from a first heat medium input port (15) and allows the heat medium to flow inside.
The heat medium that flows through the first M heat tank (11) and overflows is introduced into the second heat storage tank (1), which causes the heat medium to flow inside.
2), a second heat storage tank in which the heat medium passed through the second heat storage tank (12) and sent out and the heat medium from the second heat medium input port (7) are introduced and the heat medium is made to flow inside. The heat medium flowing through the 3H heat tank (33) and the third heat storage tank (13) and overflowing is introduced, the heat medium is made to flow inside, and then discharged from the heat medium outlet (16). It consists of a 4th N heat tank (14), and its various types (11), (12), (13), (14)
) respectively house latent heat storage bodies (1) in an array.

To explain the latent heat storage body (1) in detail, the latent heat storage body (1), as shown in FIG. A latent heat storage material with a specific gravity smaller than that of the medium is sealed together with air. The latent heat storage body (1) includes the heat storage tank (1).
0) various types (11), (12), (13),
(14) are arranged vertically in multiple rows (two rows for each tank) so that they are arranged in a close-packed state, and then stacked in multiple stages with spacers (4) interposed in the middle. , and are stored in an aligned state. Moreover, each latent heat storage body (1
) are provided with protrusions (1a) on the lateral side surfaces thereof, and these protrusions (1a) abut against each other to form a heat medium flow area with an appropriate space between them.

The latent heat storage bodies (1) thus arranged in an array are the latent heat storage bodies (1) located in the uppermost stage among them.
Floating stays (2) are installed on top of each type (11), (12), (13), and (14) with four assigned to each.
This prevents it from rising due to its buoyancy. Note that (5) in FIG. 3 is a drop shelf arranged at the top opening of the heat storage tank (10).

Next, the flow of the heat medium within the heat storage tank (10) will be described in further detail.

As shown in Fig. 2, the heat medium introduced into the inlet rectifier from the first heat medium input port (15) descends along the inlet baffle plate (6) and covers the entire floor surface of the heat storage tank (10). At the same time, the flow passes through a stretched grating floor (not shown), bypasses the lower end of the inlet baffle plate (6), enters the first heat storage tank (11), and rises. The heat medium that has risen through this ls heat tank (11) is the first one. Second heat storage tank (11
), (12) overflows the partition wall (17) that separates the second heat storage tank (12), flows through the grating floor, and at the same time flows through the second heat storage tank (12). Third heat storage tank (12), (
13) and enters the third heat storage tank (13). A second inlet (7) is provided at the lower end of the third heat storage tank (13), and a new heat medium that has been branched off before entering the inlet (15) is introduced and merges therewith. The combined heat medium rises up the third heat storage tank (13), and the partition wall (
17) and flows into and descends into the 4th N heat tank (14),
Similar to the artificial side, the flow passes through the grating bed, bypasses the lower end of the outlet basoful plate (8), enters the outlet rectifier, and circulates through the outlet (16) to the heat pump (not shown).

As shown in FIG. 1, a flow rate regulating valve (19) is provided in the heat medium supply path (9) to the second input port (7) together with a solenoid valve (18), ) and the second
The configuration is such that the ratio of heat medium input to the input port (7) can be changed.

[Another example]

■ The second input port (7) may be installed at the second heat storage tank (12) or the fourth heat storage tank (14), or from the second heat storage tank (12) to the fourth heat storage tank (14). It may be attached to any two of the above.

■ In addition, the input ports (7) and (15) are installed in all of the first heat storage tank (11) to the fourth heat storage tank (14), and the heat medium is introduced from all of these input ports (7) and (15). Various heating medium injection methods can be adopted, such as one method in which the heating medium injection port is sequentially switched at intervals of time.

■ The heat storage tank (10) does not have to have four chambers. Furthermore, the arrangement shown in the drawings does not necessarily have to be adopted.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the heat storage device according to the present invention, in which FIG. 1 is an overall schematic configuration diagram, FIG. 2 is a perspective view showing the flow of the heat medium in the heat storage tank, FIG. 3 is an overall perspective view, and FIG. 1 and 5 are configuration diagrams showing the flow of a conventional heat medium. (1)...Latent heat storage body, (7), (15)
...Heat medium inlet, (11), (12)
, (13), (14)... Heat storage chamber, (1
6)...Exhaust port.

Claims (1)

[Claims] A plurality of latent heat storage bodies (1) formed by enclosing a latent heat storage material in a container are arranged in parallel with their heat transfer surfaces along the flow direction of the heat medium to constitute a latent heat storage body group, and A plurality of heat storage chambers (11), (12), in which a plurality of groups of latent heat storage bodies (1) configured in (1
3) and (14), wherein the heat medium input ports (7) and (15) are connected to the heat storage chamber (11) on the most upstream side and the heat storage chamber (11) on the downstream side thereof. Room (12),
(13) and (14), and the input port (
7), the discharge port (16) for merging the heat medium input from (15) and discharging it out of the machine is connected to the heat storage chamber (14) on the most downstream side.
A heat storage device installed in