JPH044509B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an intermittent heat pump device that utilizes reaction heat during storage and release for hot water heating and cooling;
This invention relates to a heat exchanger that serves as a storage container for metal hydrides and the like that absorb and release hydrogen.

PRIOR ART In general, working substances are granular substances such as zeolite or fine powders such as metal hydrides, and a working medium such as water vapor or hydrogen is supplied to and stored in such working substances, or the working substance is occluded. When trying to release a working medium, a laminated heat exchanger as shown in Figure 9 is considered, which has a large heat transfer area to effectively extract heat generation and heat absorption from the working substance, since the heat conduction of the working substance is poor. It will be done.
That is, as shown in FIG. 9, it has a plurality of comb-shaped notches 1 for accommodating the working substance, notches 2 serving as working medium flow ports, and cutouts 3 and 4 serving as heat transfer medium flow ports and headers. A working substance container 6 formed by stacking a plurality of flat plates 5, a flat channel body 8 having a heat transfer medium channel groove layer 7, and a partition plate 9 between the working substance container and the channel body. There is a stacked heat exchanger that consists of alternating layers.

Problems to be Solved by the Invention In such a laminated heat exchanger, the working material container that houses the working material is a heat transfer medium that transfers the heat that accompanies the working material occluding and releasing the working medium. The size is determined by the amount of working substance that can be accommodated in order to carry out a reaction sufficient to transfer the necessary amount of heat to the heat transfer medium flowing through the flow path.

In the case of the stacked type, the number of stacked plates forming the working substance container is determined by the working substance capacity. However, if we increase the number of flat plates that can be stacked just because the working substance capacity is large,
For example, the thermal conductivity of working substances is 0.2 kcal/mh°C for metal hydrides, and 320 kcal/mh for copper.
℃, 170kcal/mh℃ for aluminum and 10 to 15kcal/mh℃ for stainless steel, so the reaction heat between the working substance and the working medium is not sufficiently transferred to the heat transfer medium. On the other hand, if the number of stacked flat plates is reduced, the distance between the working substance and the heat transfer medium will be shortened and the heat transfer coefficient will improve, but this will require more heat transfer medium flow channels and partition plates, which will increase the heat transfer rate. A problem arises in that the size of the exchanger increases, and the amount of sensible heat in the heat exchanger that does not contribute to transfer of reaction heat also increases.

The present invention has been made in view of this point, and an object of the present invention is to improve the heat transmission coefficient in a heat exchanger.

Means for Solving the Problems In order to solve the above-mentioned problems of the present invention, a comb-shaped notch is provided inside a working substance container formed by laminating a plurality of flat plates each having a comb-shaped notch for accommodating a working substance. In parallel with this, fins are provided which are in contact with flat plates that serve as partition plates between the heat transfer medium channel bodies on both sides and the heat transfer medium channel groove layer of the working substance container.

Function The fins provided in the comb-shaped notch that accommodates the working substance in the working substance container are in contact with the accommodated working substance and absorb the reaction heat between the working substance and the working medium, rather than the low thermal conductivity of the working substance. Because the value is several orders of magnitude higher, heat is efficiently transferred to the heat transfer medium flowing inside the heat transfer medium flow path that is in contact with both sides of the fin.

In addition, this type of laminated heat exchanger generally uses water, which can utilize latent heat, as a heat transfer medium to obtain a high heat transfer coefficient, so the saturation pressure at high temperature is several tens of tens of degrees.
Kg/cm ² and is often made of high-strength metals such as stainless steel due to its pressure resistance. Therefore, by using metals such as copper and aluminum that have high thermal conductivity for the fins, even greater heat transfer can be expected.

Embodiment An embodiment of the present invention will be described below based on the accompanying drawings. FIG. 1 is an overall perspective view of a laminated heat exchanger 1 according to an embodiment of the present invention. The flange to which the pipe 13 is attached and the pipes 14 and 15 of the heat transfer medium inlet and outlet are shown welded after drilling holes. In FIG. 2, the thickness is 0.5 mm, which has a plurality of comb-shaped notches 5 that accommodate working substances, notches 2 that serve as working medium flow ports, and cutouts 3 and 4 that serve as heat transfer medium flow ports and headers.
A flat plate 16 (Fig. 3) with a thickness of approximately 2 mm is processed by etching or pressing, and a plurality of working substance containers 6 are formed by stacking them, and a flat plate 16 with a thickness of approximately 0.5 to 2 mm is processed with a depth of 0.25 to 1 mm by etching, etc. A heat transfer medium flow path body 8 (FIG. 4) having a heat transfer medium flow path groove 7 and cutouts 3 and 4 that serve as a heat transfer medium flow path opening and a header.
and a partition plate 9 which is located between the working substance container 6 and the heat transfer medium channel body 8 and serves as a partition wall of the heat transfer medium channel groove 7.
(Fig. 5) are laminated one after another, and the end plate 10, which is about 2 to 5 mm thicker than the various laminated flat plates shown in Fig. 6, is overlaid for reinforcement and brazed or diffusion welded. The closely spaced surfaces are joined using solid phase welding to form a laminated heat exchanger.

A fin shown in FIG. 7 is inserted into the comb-shaped notch 1 of the working substance container 6 so as to be in contact with the heat transfer medium channel body 8 and the partition plate 9 on both sides of the working substance container, parallel to the comb-shaped notch. 11 will be provided. The fin 11 has a slit 12 large enough for the working substance to pass through so that the working substance is distributed and accommodated on both sides of the fin when the working substance is filled into the working substance container. The working medium enters the working substance container and can undergo a sufficient reaction with the working substance. The heat of reaction between the working substance and the working medium is transferred through the fins 11 to the heat transfer medium flowing inside the heat transfer medium channel bodies on both sides. The size of the fins is 0.1 to
By making the fins larger by about 0.5 mm, the contact between the fins and the heat transfer medium channel bodies and the partition plates on both sides is strengthened.

FIG. 8 shows a modified fin in which the contact surfaces with the heat transfer medium channel bodies and the partition plate on both sides are folded back and widened to reduce the contact thermal resistance. At this time, the contact surface is made stronger by narrowing the width of the comb teeth of the plates on both sides of the laminated flat plates containing the working substance, and by overlapping them with the folded portions of the fins in between.

Note that this is not limited to a heat exchanger that exchanges the reaction heat when occluding and releasing a working medium of a working substance to a heat transfer medium, but also a heat exchanger that stores and releases a working medium by transferring heat from a heat transfer medium to a working substance. It may also be a heat exchanger as a working substance storage container.

In addition, unlike the material of the heat exchanger, which takes pressure resistance into consideration, the material of the fins has no problem with pressure resistance, and even higher heat transfer can be achieved by using metals with high thermal conductivity such as copper and aluminum. I can do it.

Effects of the Invention The present invention provides fins with slits in contact with the working substance in the comb-shaped notch of the working substance container that accommodates the working characteristics, thereby transmitting the reaction heat between the working substance and the working medium through the fins. It can be transferred to the heat medium, increasing the heat transfer coefficient without significantly increasing the amount of sensible heat in the heat exchanger.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of a laminated heat exchanger according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of the laminated heat exchanger, and Fig. 3 is a component of the laminated heat exchanger. Fig. 4 is a perspective view of a working substance accommodating flat plate having a comb-shaped notch for accommodating a working substance; The figure is a perspective view of a partition plate serving as a partition between the working substance container and the heat transfer medium flow groove layer, and FIG. 6 is a perspective view of the end plate.
FIG. 7 is a perspective view of the same fin, FIG. 8 is a perspective view of a fin according to another embodiment of the present invention, and FIG. 9 is a perspective view showing the assembly structure of a conventional stacked heat exchanger. DESCRIPTION OF SYMBOLS 1... Laminated heat exchanger, 6... Working medium container, 8... Heat transfer medium channel body, 9... Partition plate, 10...
...end plate, 11...fin.

Claims (1)

[Scope of Claims] 1. A flat plate having a comb-shaped notch for accommodating a working substance and a working medium inlet communicating with the comb-shaped notch.
or a working substance container formed by laminating a plurality of layers, a heat transfer medium channel plate having a heat transfer medium channel groove for transferring heat of reaction between the working substance and the working medium, and the working substance container; It has a block in which flat plates serving as partition walls with the heat transfer medium channel body are laminated alternately,
A laminated heat exchanger having fins inside the working substance container that are parallel to the comb-shaped notch and in contact with the heat transfer medium channel body and the partition plate on both sides. 2. The laminated heat exchanger according to claim 1, wherein the fins are made of copper or aluminum.