JPH0289995A - Heat accumulating device - Google Patents

Abstract

PURPOSE:To know heat accumulating condition surely by a method wherein the amount of displacement of the outermost side latent heat accumulating body, pushed by the expansion of the latent heat accumulating body, positioned at the outermost side of the group of latent heat accumulating bodies, itself and the expansions of the other latent heat accumulating bodies, is measured by a detecting body such as a piezoelectric element or the like. CONSTITUTION:Latent heat accumulating bodies 1 are arranged so as to be brought into contact closely and projections 1a on the side surfaces thereof are abutted actually against each other whereby the flow passage of heat medium fluid is provided. When heat accumulation is started from a condition before starting the heat accumulation, the volume of respective latent heat accumulating bodies is expanded by the change of the phase of latent heat accumulating material. Then, the latent heat accumulating body 1, positioned at the outermost side of the group of the latent heat accumulating bodies 1 and specified as the detecting object of a detecting sensor 3, is proximated to the detecting sensor 3 by receiving moving forces of the volumetric expansion of itself as well as the volumetric expansions of the other neighboring latent heat accumulating bodies 1 whereby the same is brought into contact with the detecting sensor 3 when the amount of accumulated heat has arrived at a set value. The ON-OFF control of the operation of a heat pump may be effected by receiving the signal of the detecting sensor 3 and judging that the amount of accumulated heat has arrived at the set value.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heat storage device in which a plurality of latent heat storage bodies each formed by enclosing a latent heat storage material in a container are closely juxtaposed in a heat storage tank. More specifically, the heat storage device and a heat pump are used in combination, the heat pump is operated using nighttime electricity to store heat in the heat storage body, and the heat storage device alone or in combination with the heat storage device heat pump is used for daytime air conditioning loads. The present invention relates to a heat storage device that can reduce running costs by operating heat pumps at the same time compared to operating only heat pumps.

[Conventional technology]

In the heat storage device as described above, as a method of grasping the amount of heat storage, as shown in Fig. 5, a tube-type heat exchanger (
9) is immersed in a water-type heat storage tank, a refrigerant is circulated in this tube (18), and ice is formed on the outer surface of the duplex, and the water level of this heat storage tank (10) is measured with a water level meter (19). A method was used to determine the amount of heat stored.

[Problem to be solved by the invention]

However, in this case, a precise water level detector is required because the water level rise due to icing cannot be taken too much, and if the vibration source is nearby, the water surface will ripple and accurate measurements cannot be made. In addition, there were various problems such as the need to constantly control the reference water level.

An object of the present invention is to provide a device that allows the state of heat storage to be known more reliably than in the past.

[Means to solve the problem]

The characteristic configuration according to the present invention is as follows: (1) A detection body for detecting the total expansion type in the close contact direction in a group of latent heat storage bodies that expands following the volumetric expansion of the latent heat storage material undergoing a phase change is placed at the outermost side of the group of latent heat storage bodies. (1) arranging the latent heat storage body at a position to be measured; and (2) determining the phase change state of each latent heat storage body in the heat storage tank based on the detection result of the detection body. , its functions and effects are as follows.

[For production]

In other words, when the latent heat storage material undergoes a phase change and expands in volume, the container also expands. Since this phase change of the latent heat storage material occurs within the containers of all the latent heat storage materials, for example, as shown in FIG. By measuring the amount of movement of the outermost latent heat body that is pressed by the expansion and the expansion of other latent heat storage bodies with a detection body such as a piezoelectric element, the total expansion type of all latent heat storage bodies and the amount of heat storage can be determined. .

〔Effect of the invention〕

Therefore, instead of knowing the amount of swimwear indirectly through the water level as in the past, this method directly measures the amount of expansion.
It is possible to know the amount of heat storage more accurately. Moreover, there is an advantage that the heat storage state of the total latent heat storage body can be grasped even though it is a single detection object.

〔Example〕

In FIG. 3, (10) indicates a heat storage tank of a heat storage device that stores the phase change 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. a first heat storage tank (11) divided into four by a partition wall (17);
It consists of a second heat storage tank (12), a third heat storage tank (13), and a fourth heat storage tank (14). More specifically, the heat storage tank (
10) is a first heat storage tank (11) to which a heat medium fluid is supplied from a heat medium fluid supply port (15) and allows the heat medium fluid to flow inside; A second heat storage tank (in which the heat medium fluid wetting out is introduced and the heat medium fluid is made to flow inside)
12), a third heat storage tank (13) into which a heat medium fluid sent after passing through the second heat storage tank (12) is introduced, and the third heat storage tank (13) allows the heat medium fluid to flow therethrough; (13) from a fourth heat storage tank (14) into which a heat medium fluid that flows through and wets out is introduced and is discharged from a heat medium fluid discharge port (16) after passing the heat medium fluid inside; There are various types (11),
In (12), (13), and (14), latent heat storage bodies (1) are housed and arranged in an aligned state, respectively.

To explain the latent heat storage body (1) in detail, the latent heat storage body (1) is, as shown in FIG. A latent heat storage material having a specific gravity lower than that of the heat transfer fluid is sealed together with air inside the heat transfer medium. And the cough latent heat storage body (1) is
Various types (11), (12), of the heat storage tank (10),
(13) and (14) are arranged in multiple rows (two rows for each tank) in a close-packed state, respectively, and then multi-tiered with spacers (4) interposed in the middle. They are stacked on top of each other and are housed in an aligned state. Moreover, a convex portion (la) is provided on the side surface of each latent heat storage body (1), and these convex portions (la) are in contact with each other, creating a flow area for the heat medium fluid with an appropriate space between them. It is formed.

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.
Various types (11), (12), (13),
(14) Four floating stays (2) are allocated and installed to prevent floating due to their buoyancy. Note that (5) in Figure 3 is a heat storage tank (
10) A drop shelf placed in the top opening.

Next, various (11), (12), (13),
The means for knowing the amount of heat storage in (14) will be explained. Second
As shown in figures (a) and (b), various types (11), (1
2), (13), (14) outer wall (11^), (
12A), (13A), (14A) A recess is formed on the inner surface, and a mounting base (6) to which a detecting body (3) such as a piezoelectric element is fixed is mounted in the recess. On the other hand, the heat storage tank (1
1).

The latent heat storage bodies (1) in (12), (13), and (14) are closely arranged with their long lateral sides touching each other, and the protrusions (1a) of these lateral sides are actually brought into contact with each other. This provides a passage for heat transfer fluid. Therefore, as shown in (b) of Fig. 2, when heat storage starts from the state before heat storage starts, each latent heat storage body (1) changes the phase of the latent heat storage material as shown in (a) of Fig. 2. Volume expansion occurs due to change. Then, the detection sensor (
The latent heat storage body (1) located at the outermost side of the group of latent heat storage bodies (1) that is the object of detection in 3) has a close contact direction due to its own volumetric expansion and the volumetric expansion of other adjacent latent heat storage bodies (1). It approaches the detection sensor (3) due to the moving force, and contacts and acts on the detection sensor (3) with the set amount of heat storage. Therefore, upon receiving the signal from this detection sensor (3), it is determined that the set heat storage amount has been reached and the operation of the heat pump is stopped.
F control can be performed. However, the mounting base (6) to which the detection sensor (3) is fixed is made of resin, and the latent heat storage body (1)
If it bulges out by more than a set amount, it will elastically deform to absorb the amount of bulge.

[Another example]

■ The above-mentioned detecting body (3) has a structure that can promote the volumetric expansion only at the - point, but for example, as shown in Fig. 4, the sensor rod (7) is connected to the outermost latent heat storage body. (1
) in contact with the sensor rod (7) according to the amount of volumetric expansion.
The sensor rod (7) is connected to a rotation sensor such as a potentiometer via an arm (8) connected to the sensor rod (7), and the amount of volumetric expansion can be continuously detected.

■ In addition, an optical sensor type distance meter is adopted as the detection object (3), and the outer wall of the tank (116), (12A),
(13A).

(14A) A configuration may be adopted in which the amount of volumetric expansion is determined by measuring the distance from the inner surface to the outermost latent heat storage body (1).

(2) As for the state in which the latent heat storage bodies (1) are closely juxtaposed, a juxtaposed state may be adopted that takes into account the amount of volumetric expansion of each latent heat storage body (1).

■ The latent heat storage body (1) may have a spherical shape.

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 the drawing]

The drawings show an embodiment of the heat storage device according to the present invention, in which Fig. 1 is a perspective view showing a latent heat storage body, and Fig. 2 (A) is a longitudinal cross-sectional view showing a state in which the latent heat storage body undergoes a phase change and volumetric expansion. , Figure 2 (
B) is a vertical cross-sectional view showing the state before the latent heat storage body undergoes a phase change, FIG. 3 is a perspective view showing the heat storage tank, and FIG. 4 is another embodiment of the detection body for detecting the phase change state of the latent heat storage body. FIG. 5 is a vertical cross-sectional view showing a conventional heat storage method. (1)... Latent heat storage body, (3)... Detection body, (10)... Heat storage tank. Figure 5 Ikomi Patent Attorney Osamu Kitamura

Claims (1)

[Claims] In a heat storage device in which a plurality of latent heat storage bodies (1) formed by sealing a latent heat storage material in a container are closely juxtaposed in a heat storage tank, the latent heat storage material expands to follow the volumetric expansion of the latent heat storage material that undergoes a phase change. A detection body (3) that detects the total expansion amount in the juxtaposition direction of the latent heat storage body group is placed at a position where the latent heat storage body (1) located at the outermost side of the latent heat storage body group is to be measured. Also, a heat storage device configured to grasp the phase change state of each latent heat storage body in the heat storage tank (10) based on the detection result of the detection body (3).