JPS621520Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is directed to a pipe member for storing a hydrogen storage alloy, in particular,
This invention relates to a tube section that accommodates a hydrogen storage alloy and heat exchange fins that protrude from the outer circumferential surface of the tube section.

[Prior art]

Conventionally, in a pipe member for storing a hydrogen storage alloy, as shown in FIG. 1, the tips of heat exchange fins 2 protruding from the outer peripheral surface of a pipe part 1 are located on an imaginary cylindrical surface concentric with the pipe part 1. It was structured like this.

[Problem that the invention attempts to solve] However, the above structure has the following problems.

B. When the heat exchange fins are formed into a virtual cylindrical shape,
Since the pipe members tend to roll, there is a high risk that the pipe members placed on the upper side will fall during stacking, or that the stack of pipe members will collapse.

(b) When using the above pipe members in a stacked manner,
Since the vertical and horizontal arrangement pitches of the tube members are approximately equal to the diameter of the circular cross section of the virtual cylinder, which is a relatively large value, the space occupied by one tube member becomes large. For this reason, the hydrogen storage container in which the pipe members are integrated becomes larger.

Furthermore, since the heat exchange fins are uniformly protruding from the outer circumferential surface of the tube, a large heat dissipation area is formed by the heat exchange fins even at the top where there is less hydrogen storage alloy, which improves heat dissipation efficiency as a whole. decreases.

An object of the present invention is to provide a pipe member for storing a hydrogen storage alloy that can be stacked compactly and does not collapse or fall when stacked.

[Means for solving problems]

In order to achieve the above object, the present invention is constructed as shown in FIG. 2, for example.

That is, a large number of heat exchange fins 2 are provided on the outer peripheral surface of a cylindrical tube portion 1 that houses a hydrogen storage alloy 6 in a radial direction centered on the axis thereof, and the tips of the fins 2 are spaced apart from each other. The fins 2 are arranged at appropriate intervals along the axial direction of the tube portion 1, and the distance a between opposite sides of the square cross section of the virtual regular square tube 3 is set. is configured to be smaller than the diameter d of a circular cross-section having the same cross-sectional area as this square cross-section.

[Effect]

Next, its effect will be explained.

When the heat exchange fins 2 protruding from the outer circumferential surface of the tube part 1 are formed into a virtual square cylinder 3, stability is improved even if the lower surface of another tube member is placed on the upper surface of the tube member. The heat exchange fins 2 can also be used as fixing means.

In addition, when the tip of each heat exchange fin 2 is located on the circumferential surface of the virtual square cylinder 3, the virtual cylinder 4
Compared to the case where the tip of each fin 2 is positioned at
The amount of protrusion of the fins in the diagonal direction is expanded to the outside of the virtual cylinder 4, and the amount of protrusion of the fins in the opposite side direction is reduced in proportion to the increased heat transfer area, so that the distance between opposite sides of the square cross section of the virtual regular square cylinder 3 is reduced. a is approximately 89% of the diameter d of the circular cross section of the virtual cylinder 4.

Therefore, when these pipe members are stacked vertically and horizontally, the arrangement pitch is about 11% smaller than that of the conventional pipe members, so that the entire hydrogen storage container in which these pipe members are integrated becomes compact.

Furthermore, the heat exchange fins 2 are only slightly protruded from the top of the tube portion 1, and the heat radiation area at the top where the hydrogen storage alloy 6 is small is small.

〔Example〕

Next, an embodiment of the present invention will be described based on FIG.

A large number of heat exchange fins 2 are provided radially projecting from the outer peripheral surface of the tube portion 1 housing the hydrogen storage alloy 6 at appropriate intervals in the circumferential direction. Each of these fins 2 is formed continuously in the axial direction over the entire length of the tube portion 1, and the tip thereof is connected to the tube portion 1.
It is located on the circumferential surface of a virtual regular square cylinder 3 concentric with . In order to increase the surface area of each fin 2, a protrusion 7 is formed over the entire length of each fin 2.

In addition, internal fins 5 for heat exchange are provided on the inner circumferential surface of the tube portion 1.
is protruded in the centripetal direction, which allows the pipe portion 1 to
The efficiency of heat exchange between the hydrogen storage alloy 6 housed inside and the pipe portion 1 is increased.

Reference numeral 8 indicates a perforated pipe for supplying and discharging hydrogen.

However, it is not essential that the outer heat exchange fins 2 be continuous over the entire length of the tube section 1, but may be omitted at the ends in the longitudinal direction of the tube section 1, or provided intermittently over the entire length. You can.

In addition, in the above embodiment, the pipe portion 1 and the virtual square cylinder 3
However, by placing the tube part 1 eccentrically above the virtual square cylinder 3, the lower half of the tube part 1 where a large amount of heat exchange is performed can be used for heat exchange. It is also conceivable to increase the amount of protrusion of the fins 2 so that heat can be dissipated more efficiently.

[Effect of idea]

Since the present invention is configured and operates as described above, it has the following effects.

(b) The outer shape of the pipe member is a virtual square cylinder, so
The tube member does not roll, and the heat exchange fins can also be used as a fixing means. Therefore, the pipe members placed on the upper side will not fall down during stacking, and the pile of pipe members will not collapse.

(b) Moreover, since the heat exchange fins are formed in the shape of a virtual square cylinder in the tube part, while maintaining the same heat transfer area as in the case of a conventional virtual cylinder, the distance between opposite sides of the square cross section of the virtual square cylinder is maintained. can be made smaller than the diameter of the circular cross section of the virtual cylinder, and the vertical and horizontal arrangement pitches of the tube members can be made small. Therefore, when the pipe members are integrated, the space occupied by one pipe member becomes smaller, and the hydrogen storage container in which the pipe members are integrated can be made smaller.

(c) Furthermore, since the heat exchange fins are not protruded from the top of the tube, the distribution of the heat radiation area of the heat exchange fins is large near the hydrogen storage alloy, and the heat exchange fins have a large distribution near the hydrogen storage alloy, and the heat exchange fins have a large distribution at the top where there is less hydrogen storage alloy. Therefore, the heat dissipation efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 is an end view of a conventional tube member, and FIG. 2 is an end view of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Pipe part, 2... Heat exchange fin, 3... Virtual square cylinder, 4... Virtual cylinder, 5... Internal fin, 6... Hydrogen storage alloy.

Claims (1)

[Claims for Utility Model Registration] 1. Cylindrical tube section 1 for housing hydrogen storage alloy 6
A large number of heat exchange fins 2 are provided on the outer circumferential surface of the heat exchanger fins 2 projecting in the radial direction around the axis thereof, and the tips of the fins 2 are positioned on the circumferential surface of a virtual regular square cylinder 3 that is adjacent to each other without any gaps. , the fins 2 are arranged at appropriate intervals along the axial direction of the tube portion 1, and the distance a between opposite sides of the square cross section of the virtual regular square tube 3 is determined from the diameter d of a circular cross section having the same cross-sectional area as the square cross section. A pipe member for storing a hydrogen storage alloy, which is characterized by having a smaller size. 2. Scope of Utility Model Registration The pipe member for housing a hydrogen storage alloy as set forth in claim 1, in which internal fins 5 protruding in the centripetal direction are provided on the inner circumferential surface of the pipe portion 1.