JP2503595Y2 - Thermal Louver - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to improvement of a thermal louver (hereinafter, simply referred to as a louver) used for thermal control of an artificial satellite, for example. The louver is a so-called variable efficiency radiator that can actively control the amount of heat radiation from the heat generation source by automatically opening and closing multiple blades arranged in the shape of a shutter on the outside of the heat radiation plate. Since it is relatively simple and can expect large changes in radiation efficiency, it is effectively used for temperature control of artificial satellites where the orbital thermal environment fluctuates greatly and devices where internal heat generation changes greatly.

[Prior Art] In FIG. 3, (1) is a heat sink, which is manufactured by applying white paint to a heat conductor so that the emissivity is large and the solar absorptivity is small. (2) is a bimetal coil arranged in parallel on one surface side of the heat dissipation plate (1). (3) is a blade attached to the heat dissipation plate and rotated by the bimetal coil, the surface of which is mirror finished. (4) is a blade shaft, (5) is a housing for mechanically supporting the bimetal coil and the shaft, (6) is a housing cover for thermally insulating the bimetal coil from the outside, and (7) is A side fence for mechanically supporting the other end of the shaft, (8) is an end fence for mechanically connecting the housing and the side fence.

FIG. 4 is a view in which the shaft bearing (9) including the shaft (4) is cut in a cross section perpendicular to the heat dissipation plate (1) in order to show in detail how the side fence supports the shaft. . (10) is a bearing holder that is integrated with the side fence.

Next, the operation will be described. The temperature of the heat sink (1) is transmitted to the bimetal (2) through the housing (5),
The bimetal (2) rotates according to the temperature and opens and closes the blade (3). By this, from the heat sink (1),
For example, it controls the amount of heat released to the external environment such as the space environment.
Therefore, the heat sink (1) is controlled to a constant temperature regardless of the change of the thermal environment.

[Problems to be Solved by the Invention] In the case of the louver as described above, the side fence (7) must first be removed when the blade (3) is attached or detached during the assembly process. Since multiple blades are supported by one side fence, they must be removed at the same time even if one blade is installed. Therefore, the workability was extremely poor. Especially in recent years, the louvers have become larger and larger, and a large louver in which the number of blades cylinderd by one side fence is 8 to 10 has been a fatal drawback.

[Means for Solving the Problems] In the louver according to the present invention, the bearing is fitted in the axial direction of the shaft shaft by, for example, a screw, and a slit is provided on the upper portion of the bearing holder.

[Operation] In the present invention, when the blade is taken out, first, the bearing is pulled out along the axial direction to the outside, and then the shaft can be lifted upward to take out the blade individually. Reverse this procedure when installing.

[Embodiment] FIGS. 1 and 2 show an embodiment of the present invention, and (1) to (10) are exactly the same as the conventional louvers. FIG. 1 is a sectional view in which a bearing (9) supporting the shaft (4) is cut in a cross section including the shaft (4) and perpendicular to the heat dissipation plate (1). (11) is a slit which is a feature of the present invention and is cut in the upper portion of the bearing holder (10). In the slit (11), when the bearing (9) is housed in the bearing holder (10) and the shaft (4) is supported, the slit is blocked by the bearing (9) and the bearing (9) is closed. The slit is opened in the state of being pulled out along the axial direction. FIG. 2 is a view for making the operation of the present invention easier to understand. In the figure, the bearing (9a) is housed in the bearing holder (10a), while the shaft (4a) is supported by the bearing (9a), the bearing (9b) is the bearing holder (10b).
The shaft (4b) is pulled out from the slit (11b). As shown in the figure, the bearing (9) and the bearing holder (10) are screwed together so that the bearing (9) can be pulled out in the longitudinal direction by rotation. In this state, the shaft (4) can easily pass through the slit (11) provided on the upper part of the bearing holder (10).

The decrease in strength of the bearing holder (10) due to the slit (11) is almost negligible, and the function and performance of the bearing are the same as before.

[Effect of the Invention] As described above, the present invention has an effect that each blade can be easily attached and detached without affecting the strength of the entire louver and the characteristics of the bearing.
It is possible to increase the size of the louver.

[Brief description of drawings]

1 and 2 are views of a thermal louver showing an embodiment of the present invention, and FIGS. 3 and 4 are views showing a conventional thermal louver. (1) heat sink, (2) bimetal, (3) blade, (4) shaft, (5) housing, (6) housing cover, (7) side fence, (8) End fence, (9) bearing for supporting the shaft, (10) bearing holder,
(11) is a slit. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Scope of utility model registration request] 1. A heat dissipation plate, a plurality of bimetals provided on the heat dissipation plate, one side of the heat dissipation plate provided along a side fence, and one of shafts provided at both ends of the bimetal coil. In the thermal louver provided with a plurality of blades, each of which is supported by the side fence and which is rotated by the action of the bimetal coil to control the amount of heat radiation, the side fence includes the other of the blade shafts. A bearing holder having a slit having a width through which the other of the shafts of the blades passes, and a bearing holder housed in the bearing holder and movable in the axial direction thereof. When it is stored in the above position, the slits are closed and moved upward along the axial direction. It has a structure to open the slit, thermal louvers, characterized by comprising a shaft bearing for mounting detachably the other shaft of the blade.