JPH06193996A - Hydrogen occlusion alloy packed container having built-in heat exchanger - Google Patents

Abstract

PURPOSE:To improve the endurance of heat carrier piping. CONSTITUTION:In a hydrogen occlusion alloy packed container comprising a container packed with hydrogen occlusion alloy and provided with fins 5 and a heat exchanger equipped with hydrogen piping and heat carrier piping 3 in the inside thereof and integrated in the container in such a manner that heat carrier fed from outside through a heat carrier connector pipe 9 connected to the heat carrier piping 3 effects heat exchange with the hydrogen occlusion alloy in the container through the heat carrier piping 3, a tubular reinforcement member 19 is inserted in the interior of connecting part of the heat carrier piping 3 and the heat carrier connector pipe 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrogen storage alloy filling container having a built-in heat exchanger which contributes to a longer life of a cooling and heating system using a hydrogen storage alloy.

[0002]

2. Description of the Related Art Hitherto, various cooling devices utilizing an endothermic reaction when a hydrogen storage alloy releases hydrogen have been proposed. For example, Japanese Patent Publication No. 58-199555 discloses two types of cooling devices having different hydrogen equilibrium pressures. An apparatus has been proposed in which two pairs of heat exchangers each containing the hydrogen storage alloy are provided, and one of the vessels of each set is alternately used as a cooling / heating source to continuously perform cooling or heating.

As the hydrogen storage alloy filling container (hereinafter referred to as hydrogen storage alloy filling container) having the above-mentioned heat exchanger built therein, for example, one having a structure as shown in FIG. 6 is used. Is filled with the hydrogen storage alloy 2 and penetrates through the hydrogen storage alloy 2 to form the heat transfer medium pipe 3
Is provided, and further, hydrogen pipes 4 are provided, fins 5 are provided on these, and they are housed in the inner case 6, and the outer case 7
It is fixed to the housing 8 with bolts (not shown) in the bolt holes 7b of the flange 7a attached to the.

The hydrogen storage alloy filling container 1 is composed of a pair of
Each of them is filled with a hydrogen storage alloy 2 having a different hydrogen equilibrium pressure, and both hydrogen pipes 4 are connected.

In the cold heat mode, the cold heat generated by releasing hydrogen from the hydrogen storage alloy filling container 1 on one low temperature side to the corresponding hydrogen storage alloy filling container 1 on the high temperature side via the hydrogen pipe 4 is a heat transfer medium pipe. 3 is taken out and the space to be cooled is cooled. At this time, the heat generated in the high temperature side hydrogen storage alloy filling container 1 is taken out from the heat medium pipe 3 and used for heating. In the regeneration mode, hydrogen is returned from the other high temperature side hydrogen storage alloy filling container 1 to the corresponding low temperature side hydrogen storage alloy filling container 1 via the hydrogen pipe 4.

Generally, in this type of cooling apparatus, when the cooling mode is finished and the mode is changed to the next regeneration mode, the hydrogen pipes 4 between the hydrogen storage alloy filling containers 1 are closed to stop the movement of hydrogen. Next, in order to enter the regeneration mode, warm heat is supplied from the heat medium pipe 3 to the high temperature side hydrogen storage alloy filling container 1 to heat it. In this way, hydrogen is moved between the two hydrogen storage alloy filling containers 1 to perform cooling and heating.

[0007]

However, in the above-mentioned conventional hydrogen storage alloy filled container 1, the heat transfer medium pipe 3 is broken due to thermal fatigue, thermal stress, etc., and there is a problem in durability.

That is, the heat transfer medium pipe 3 of the hydrogen storage alloy filling container 1 is made of copper, and as shown in the sectional view taken along the line DD in FIG. 7 and FIG. End 3a
The outer wall of the end portion 9a having a slightly wide opening of the copper heat medium connecting pipe 9 communicating with another hydrogen storage alloy filling container 1 is inserted into the inner wall of the hollow portion having a slightly wide opening. Are welded to connect the two.

In the heat transfer medium pipe 3 of the hydrogen storage alloy filling container 1 having the above-described structure, the high-temperature and low-temperature heat mediums are alternately supplied and discharged, so that thermal stress causes a breakage in the portion C in the drawing in particular. There was a problem.

This problem is an obstacle to the continuous operation of the cooling and heating system using the hydrogen storage alloy filling container, and the above problems are solved in order to improve the durability and reliability of the heat exchanger of the hydrogen storage alloy filling container. There was an urgent need to do so.

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a hydrogen storage alloy filling container having a built-in heat exchanger for improving the durability of the heat medium introducing portion of the hydrogen storage alloy filling container. .

[0012]

DISCLOSURE OF THE INVENTION According to the present invention, a hydrogen storage alloy is filled in a container, and a heat medium pipe having fins is provided inside the hydrogen storage alloy container having a hydrogen pipe attached thereto. In a hydrogen storage alloy filled container with a built-in heat exchanger that connects a heat medium connecting pipe and draws it out of the container, and exchanges heat with the heat storage medium supplied from the outside and the hydrogen storage alloy in the container through the heat medium pipe, A cylindrical reinforcing member is fitted inside the connecting portion between the medium pipe and the heat medium connecting pipe.

[0013]

With the above construction, the cylindrical reinforcing member fitted in the connecting portion between the heat medium pipe and the heat medium connecting pipe alleviates thermal fatigue and thermal stress due to the high and low temperature heat mediums. Therefore, the heat transfer medium pipe is not broken in a short period of time, the durability of the hydrogen storage alloy filling container incorporating the heat exchanger is improved, and it is possible to contribute to the continuous operation of the system.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram in which a hydrogen storage alloy filling container (hereinafter referred to as a hydrogen storage alloy filling container) incorporating the heat exchanger of the present invention is applied to a cooling device. In the figure,
The cooling device includes two high temperature side hydrogen storage alloy filled containers 1
a and 1b and two corresponding low-temperature side hydrogen storage alloy filling containers 1c and 1d are installed, and these high-temperature side hydrogen storage alloy filling containers 1a and 1b and low-temperature side hydrogen storage alloy filling containers 1c and 1d are installed. Are communicated with each other through a hydrogen pipe 4 via hydrogen valves 10a and 10b. Then, each of the hydrogen storage alloy filling containers 1a and 1b on the high temperature side is filled with a hydrogen storage alloy 2 that absorbs and releases hydrogen at a high temperature, and a heat medium pipe 3 is arranged so as to penetrate therethrough. Pipe 3 is a three-way valve 1
Heat exchanger 12 for cooler for cooling with cooling water via 1
And heating heat exchanger 13 are alternately and selectively connected.

On the other hand, the low temperature side hydrogen storage alloy filling container 1
Each of c and 1d is filled with a hydrogen storage alloy 2 that absorbs and releases hydrogen at a low temperature, and a heat transfer medium pipe 3 is arranged so as to penetrate therethrough. Furthermore, the heat transfer medium pipe 3 is connected via a four-way valve 14. The heat exchanger 15 for the space to be cooled and the heat exchanger 16 for the cooler are alternately and selectively connected.

Reference numeral 18 indicates a pump.

The hydrogen storage alloy filling container has the same structure as that shown in FIG. 2, for example, and the hydrogen storage alloy filling container 1 is filled with the hydrogen storage alloy 2 at the same time. A heat medium pipe 3 is arranged to penetrate through the hydrogen storage alloy 2, a hydrogen pipe 4 is further provided, and fins 5 are provided on the whole thereof, and the fins are housed in the inner case 6 and attached to the outer case 7. It is fixed to the housing 8 by using a bolt (not shown) in the bolt hole 7b of 7a.

FIG. 3 shows a connecting portion between the heat medium pipe 3 and the heat medium connecting pipe 9 in a portion indicated by an arrow E of the hydrogen storage alloy filling container 1 shown in FIG. The end wall 9a of the copper heating medium connecting pipe 9 communicating with another hydrogen storage alloy filling container 1 is inserted into the inner wall of the hollow portion having the wide opening, and the outer wall of the F portion is welded. . Further, a pipe 19 is inserted at the joint between the heat medium pipe 3 and the heat medium connecting pipe 9.

That is, as shown in FIG. 4 showing the G → G cross section of FIG. 3, the end portion 9a of the heat medium connecting pipe 9 is internally provided in the hollow portion inside the end portion 3a of the heat medium pipe 3, and the SUS is provided inside thereof. A pipe 19 made of metal is incorporated. The pipe 19 serves as a reinforcing member to relieve the thermal stress caused by the high-temperature and low-temperature heat media. As a reinforcing member, a tube with poor heat conduction,
For example, Teflon or the like is preferable in addition to SUS.

With the above structure, the hydrogen storage alloy filling containers 1a and 1b on the high temperature side have the characteristics of the hydrogen storage alloy 2 shown in FIG.
As a hydrogen storage alloy 2 having the characteristics shown in FIG. 5, a hydrogen storage alloy MH1 that absorbs and releases at high temperature is filled in advance, and the hydrogen storage alloy filling containers 1c and 1d on the low temperature side absorb and release at low temperature. Prefill with MH2.

In the initial state, the hydrogen valve 10a is closed and the hydrogen storage alloy 2 in the hydrogen storage alloy filling container 1c on the low temperature side has the low temperature alloy MH as shown in the cycle diagram of FIG.
2 is a state in which hydrogen is occluded (b1 in the figure), and the corresponding hydrogen occluding alloy filling container 1a on the high temperature side
The hydrogen storage alloy 2 is in a state of being released as the high temperature alloy MH1 (a1 in the figure).

On the other hand, the hydrogen valve 10b is closed, and the hydrogen storage alloy 2 of the hydrogen storage alloy filling container 1b on the high temperature side is in a state of storing hydrogen (a2 in the figure). The hydrogen storage alloy 2 in the storage alloy filling container 1c is in a state of releasing hydrogen (b2 in the figure). The solid line shown in the figure shows the absorption state, and the broken line shows the emission state.

In this state, first, when the hydrogen valve 10a is opened in the cold heat mode, hydrogen is released from the hydrogen storage alloy 2 of the hydrogen storage alloy filling container 1c on the low temperature side and communicates with the hydrogen storage alloy filling container 1a on the high temperature side. Is absorbed in the hydrogen storage alloy 2 of FIG.

In this cold heat mode, an endothermic reaction occurs in the hydrogen storage alloy filling container 1c on the low temperature side, and the heat transfer medium pipe 3 is connected as a switching valve to the heat exchanger 15 for the space to be cooled through the four-way valve 14 and Cold heat is taken out from the heat exchanger 15 for the cooling space. On the other hand, an exothermic reaction occurs in the hydrogen storage alloy filling container 1a on the high temperature side, and the heat transfer medium pipe 3 has the three-way valve 11
It is connected to the heat exchanger 12 for a cooler via and is cooled.

In the cold heat mode, the other hydrogen storage alloy filling container 1b on the high temperature side and the hydrogen storage alloy filling container 1c on the low temperature side are in the regeneration mode from the hydrogen storage alloy filling container 1b on the high temperature side to the hydrogen storage alloy on the low temperature side. A step of returning hydrogen to the alloy filling container 1d is performed. That is, the hydrogen valve 10b is opened, the hydrogen of the hydrogen storage alloy 2 (a2 in the drawing) of the hydrogen storage alloy filling container 1b on the high temperature side is released as shown in the cycle diagram of FIG. The hydrogen-absorbing alloy is filled in the hydrogen-absorbing alloy 2 (b2 in the figure) of the hydrogen-absorbing alloy filling container 1d.

In this regeneration mode, an endothermic reaction occurs in the hydrogen storage alloy filled container 1b on the high temperature side, and the heating medium heat exchanger 13 is used as a switching valve by the heat transfer medium pipe 3 via the three-way valve 11.
Connected to and heated. On the other hand, the low temperature side hydrogen storage alloy filling container 1d is in an exothermic reaction, and is connected to the heat exchanger 16 for a cooler via the four-way valve 14 as a switching valve by the heat medium pipe 3 to be cooled.

After that, the hydrogen valves 10a, 10b are closed and in a preliminary mode, the heat medium pipe 3 of the hydrogen storage alloy filling container 1a on the high temperature side is connected to the heat exchanger 12 for the cooler via the three-way valve 11, The hydrogen storage alloy filling container 1b on the high temperature side is connected to the cooler heat exchanger 12 via the three-way valve 11 by the heating medium pipe 3 to prepare for transition to the next regeneration mode. As a result, the inside of the hydrogen storage alloy filling container 1a on the high temperature side is heated to the position a2 as shown in FIG. 5, and the hydrogen storage alloy filling container 1b on the high temperature side is cooled to the position a1 shown in the drawing. It becomes the same state as the initial state.

The cold heat mode and the regeneration mode described above are alternately repeated, and when these modes are switched, the standby mode is set and continuous cold heat is taken out from the heat exchanger 15 for the space to be cooled.

As described above, two heat-exchangeable low-temperature-side and high-temperature-side hydrogen storage alloy filling containers each containing two types of hydrogen storage alloys having different hydrogen equilibrium pressures are connected by a hydrogen pipe, From the hydrogen storage alloy filling container on the high temperature side to the hydrogen storage alloy filling container on the high temperature side to generate cold heat by moving hydrogen and the hydrogen transferred to the hydrogen storage alloy filling container on the high temperature side, the hydrogen storage alloy filling container on the low temperature side In the hydrogen storage alloy filling container by alternately carrying out the regeneration mode for returning to the above and the standby mode for preventing the movement of hydrogen between the low temperature side and the high temperature side hydrogen storage alloy filling container after the completion of the cold heat mode and the regeneration mode. Continuous cooling can be performed by using the generated cold heat.

Moreover, since a pipe is arranged as a reinforcing pipe at the joint between the heat medium pipe of the hydrogen storage alloy filling container and the heat medium connecting pipe, the heat medium pipe may be broken in a short period of time by the high temperature and low temperature heat mediums. Absent. In the present example, the conventional breakage was about 100 hours, but the life was about 400 to 500 hours. As a result, the heat exchanger has excellent durability and can contribute to continuous operation of the cooling system.

[0032]

As described above, according to the present invention, the cylindrical reinforcing member fitted in the connecting portion between the heat medium pipe and the heat medium connecting pipe has thermal fatigue and thermal stress caused by the heat medium at high temperature and low temperature. Alleviate. Therefore, the heat transfer medium pipe is not broken in a short period of time, the durability of the hydrogen storage alloy filling container incorporating the heat exchanger is improved, and it is possible to contribute to the continuous operation of the system.

[Brief description of drawings]

FIG. 1 is a configuration diagram in which a hydrogen storage alloy filling container of the present invention is applied to a cooling device.

FIG. 2 is a sectional view showing a main part of the hydrogen storage alloy filling container of FIG.

FIG. 3 is an enlarged cross-sectional view showing an E arrow portion in FIG.

FIG. 4 is a sectional view taken along the line G → G in FIG.

5 is a cycle diagram of a hydrogen storage alloy used in the cooling device of FIG.

FIG. 6 is a cross-sectional view of a hydrogen storage alloy filling container.

FIG. 7 is an enlarged cross-sectional view of a portion indicated by an arrow A in FIG. 6 showing a conventional example.

FIG. 8 is a sectional view taken along the line D → D in FIG.

[Explanation of symbols]

 1a, 1b, 1c, 1d Hydrogen storage alloy filling container 2 Hydrogen storage alloy 3 Heat transfer medium pipe 3a End part 4 Hydrogen pipe 5 Fin 9 Heat transfer medium connecting pipe 9a End part 10a, 10b Hydrogen valve 11 Three way valve 12 Heat exchanger for cooler 13 heat exchanger for heating 15 heat exchanger for cooled space 16 heat exchanger for cooler

[Procedure amendment]

[Submission date] March 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

A pair of hydrogen storage alloy filling containers 1 are filled with hydrogen storage alloys 2 having different hydrogen equilibrium pressures at the same temperature, and both hydrogen pipes 4 are connected to each other.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

Moreover, since the pipe is arranged as a reinforcing pipe at the joint between the heat medium pipe of the hydrogen storage alloy filling container and the heat medium connecting pipe, the heat medium pipe may be broken in a short period of time by the high temperature and low temperature heat mediums. Absent. In the present example, the conventional fracture occurred after about 100 hours, but the life was about 400 hours to 500 hours or longer. As a result, the heat exchanger has excellent durability and can contribute to continuous operation of the cooling system.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (2)

[Claims] 1. A container which is filled with a hydrogen storage alloy inside a container, and has a heat transfer medium pipe having fins attached to the inside of the hydrogen storage alloy container having a hydrogen pipe attached, and a heat medium connecting pipe being connected to the heat transfer medium pipe. In a hydrogen storage alloy filled container having a heat exchanger that draws out to the outside and exchanges heat with a hydrogen storage alloy in the container via a heat medium supplied from the outside and the heat medium pipe, the heat medium pipe and the heat A hydrogen storage alloy filling container having a built-in heat exchanger, characterized in that a cylindrical reinforcing member is fitted inside the connection portion with the medium connecting pipe. 2. The hydrogen storage alloy filling container with a built-in heat exchanger according to claim 1, wherein a material having a low thermal conductivity is used as the cylindrical reinforcing member.