JPH01186499A - Thermal louver - Google Patents

Abstract

PURPOSE:To maintain the heat radiation quantity of the mounted equipment to an optimum value by comparing the both detection signals of the temperature sensors on an actuator side and an equipment side and sending out a control signal for allowing the temperature of an actuator to accord with the temperature of the mounted equipment. CONSTITUTION:A detection signal corresponding to the temperature of an actuator 2 is sent into a heater controller 8 by an actuator side temperature sensor 11, and at the same time, the detection signal corresponding to the temperature of the mounted equipment 7 is sent into the heater controller 8 by a mounted equipment side temperature sensor 10. The heater controller 8 compares the both detection signals, and sends out a control signal for allowing the temperature of the actuator 2 to accord with the temperature of the mounted equipment 7 into a heater 9. The heater 9 which receives the control signal controls the temperature of the actuator 2. Therefore, the opening angle of a movable blade 5 is changed, and the heat radiation quantity of the mounted equipment 7 is controlled. Therefore, the opening angle of the movable blade 5 be changed free from delay, and the heat radiation quantity in the change of heat generation in the mounted equipment 7 can be maintained at an optimum value.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a thermal louver, and more particularly to a thermal louver used for temperature control of a spacecraft.

(Prior Art) Fig. 2 shows a conventional thermal louver, Fig. 2(a) is a perspective view thereof, Fig. 3(b) is a sectional view, and Fig. 3 is a curve diagram showing the characteristics of the conventional thermal louver. be.

In the case of a conventional thermal louver, a shutter-shaped (or blind-shaped) movable blade 15 is placed on a heat radiation surface such as the outer surface of an artificial satellite.
(Fig. 2 (a)), and by changing the opening angle of the movable blade 15 using the driving force of the actuator 12, it has the function of changing the amount of heat radiated from the heat radiating surface to space (the second
Figure (b)), it is used for temperature control of on-board equipment 17 of an artificial satellite.

In this thermal louver, a bimetal or the like that deforms based on temperature changes is used for the actuator 12 for driving the movable blade 15, and the opening angle of the movable blade 15 is quickly adjusted in response to temperature changes of the equipment 17 mounted on the kira. Efforts are being made to improve the heat transfer between the actuator 12 and the mounted equipment 17 and eliminate the temperature difference between the two so that the temperature can be changed to .

The actuator 12 is incorporated into the thermal louver in order to improve heat transfer with the mounted equipment 17 as much as possible. The heat insulating material 13 is installed to minimize heat radiation from the actuator 12 to outer space and to reduce the temperature difference between the actuator 12 and the mounted equipment 17.

(Problem to be Solved by the Invention) As explained above, in the conventional thermal louver, although measures have been taken to improve the propagation of temperature from the mounted equipment 17 etc. to the actuator 12, the propagation path is Due to the thermal resistance and heat capacity of each part, the response of the actuator temperature is delayed, and the movement of the movable blade 15 is also delayed as shown in FIG. Due to this delay, if the temperature of the structure panel 16 and the onboard equipment 17 changes rapidly due to heat generation changes in the onboard equipment 17, or when the satellite enters the shade, the closing of the movable blade 15 may be delayed. Equipment 1
A problem arises in that the temperature of the on-board equipment 17 becomes too low and valuable power must be used to keep the onboard equipment 17 warm during the shaded period.

There is also a movable thermal louver that uses a small electric motor etc. as the actuator 12 for driving the blade, but in this case, not only the electric motor for driving the blade but also the opening angle detection device of the movable blade 15, It requires a morph drive control section, etc., which causes a significant increase in weight, which would be fatal for use onboard an artificial satellite.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a movable blade in the form of a shutter that adjusts the amount of heat dissipated from the spacecraft by opening and closing operations, and A thermal louver is equipped with an actuator for driving a blade that uses a deformable bimetal as a driving force, and a heat dissipation plate is attached to a part of a container housing the actuator to dissipate heat of the actuator to outer space. A heater for warming the actuator is installed inside the container, and a heat insulating material is filled between the container and a frame surrounding the container except for a portion where the heat sink is attached, and prevents heat radiation from the actuator. An actuator-side temperature sensor that detects the temperature of the actuator and sends out a detection signal corresponding to the temperature is installed in the container, and detects the temperature of the equipment mounted on the spacecraft and sends out a detection signal corresponding to the temperature. A device-side temperature sensor that sends out a detection signal corresponding to the temperature sensor is attached to the mounted device, and the temperature of the actuator is determined by comparing the detection signals of the actuator-side temperature sensor and the device-side temperature sensor. The present invention is characterized in that it includes a heater control device that controls the amount of heat generated by the heater by sending out a control signal that can match the temperature.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view showing a thermal louver according to an embodiment of the present invention.

In the figure, 1 is a heat sink, 2 is an actuator, 3 is a heat insulator,
4 is a frame, 5 is a movable blade, 6 is a structure panel, 7
8 is a mounted device, 8 is a heater control device, 9 is a heater, 10 is a device-side temperature sensor, 11 is an actuator-side temperature sensor, and 12 is a container.

The thermal louver of this embodiment is attached to the outer wall surface side of the structure panel 6.

The left and right actuators 2 are housed in a container 12, and a heat sink 1 is attached to a part of the container 12.

A heater 9 for warming the actuator 2 is installed inside the container 12.

The container 12 is arranged within a frame 4 surrounding its periphery.

A heat insulating material 3 is filled between the frame 4 and the container 12 to prevent heat radiation from the actuator 2.

An actuator-side sensor 11 is installed inside the container 12, and the actuator-side sensor 11 detects the temperature of the actuator 2 and sends a detection signal corresponding to the temperature to the heater control device 8.

The mounted equipment 7 is attached to the inner wall side of the structure panel 6. A device-side temperature sensor 10 is attached to the mounted device 7, which detects the temperature of the mounted device 7 and sends a detection signal corresponding to the temperature to the heater control device 8.

A heater-type control device 8 that controls the amount of heat generated by the heater 9 by comparing detection signals from the actuator-side temperature sensor 11 and the equipment-side temperature sensor 10 is fixed to the inner wall surface of the structure panel 6.

When the temperature of the actuator 2 is lower than the temperature of the mounted device 7, a detection signal corresponding to the temperature of the actuator 2 is sent to the heater control device 8 by the actuator side temperature sensor 11, and at the same time a detection signal corresponding to the temperature of the mounted device 7 is sent. A signal is sent to the heater control device 8 by the equipment side temperature sensor 10.
sent to. Heater control device #8 receives detection signals from both temperature sensors 10 and 11, compares both detection signals, and sends a control signal to heater 9 to match the temperature of actuator 2 with the temperature of mounted equipment 7. The heater 9 that receives the control signal generates heat and warms the actuator 2.

Since the space between the container 12 and the frame 4 is filled with the heat insulating material 3, the actuator 2 heats up quickly. When the temperature of the actuator 2 rises, the movable blade 5 deforms due to the bimetal principle and the opening angle of the movable blade 5 increases, resulting in an increase in the amount of heat dissipated from the mounted equipment 7.

On the other hand, when the temperature of the actuator 2 is higher than the temperature of the mounted equipment 7, detection signals corresponding to the respective temperatures are sent from the actuator-side temperature sensor 11 and the equipment-side temperature sensor 10 to the heater control device 8, and both Upon receiving the detection signal, the heater control device 8 sends a control signal to the heater 9 to lower the temperature of the actuator 2 to match the temperature of the mounted equipment 7. The heater 9 that receives the control signal stops generating heat. Since the heat sink 1 is directly attached to a part of the container 12, the temperature of the actuator 2 decreases quickly. As a result, the opening angle of the movable blade 5 becomes smaller.
The amount of heat dissipated from the onboard equipment 7 decreases.

According to the thermal louver of this embodiment, the opening angle of the movable blade 5 changes almost without delay with the temperature change of the mounted equipment 7, and the amount of heat dissipated when the heat generation of the mounted equipment 7 changes is maintained at an optimum level, and the amount of heat dissipated when the mounted equipment 7 changes in heat is maintained at an optimum level. Preventing the temperature drop of the installed equipment 7 inside,
It is possible to reduce the power consumption of the heat-retaining heater.

Furthermore, it is lighter in weight than a rotary type thermal louver that uses an electric motor or the like as the actuator 2, and high reliability can be ensured.

If the actuator 2 is made of a bimetal that allows the movable blade 5 to fully open at the upper limit of the allowable temperature of the mounted device 7 and fully open at the lower limit, the temperature of the mounted device 7 can be kept within the allowable temperature range.

In the above-mentioned embodiment, the mechanical part and
By controlling the heater so as to magnify the temperature change of the device-side temperature sensor 10 attached to the on-board device 7, which explains the case where the operation is performed, the temperature change width of the on-board device 7 is reduced. It is possible to do so.

In addition, by using a sunlight detector, which has a large effect on the temperature of the satellite, in conjunction with the equipment-side temperature sensor 10, the movable blade 5 of the thermal louver can be used at the same time as the onset of shade, when the temperature of the onboard equipment 7 is expected to drop. It is also possible to close C.

(Effect of the invention) As explained above, according to the uninvented thermal louver, the temperature of the actuator changes with almost no delay in response to temperature changes in the mounted equipment, so the amount of heat dissipation from the mounted equipment is always maintained at an optimum level. This can reduce power consumption.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a thermal louver according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional thermal louver.
) is a perspective view thereof, IJ(b) is a cross-sectional view, and FIG. 3 is a curve diagram showing the characteristics of a conventional thermal louver. Engineering: Heat sink, 2.12: Actuator, 3.
13...Insulating material, 4,14...Frame, 5.15
...Movable blade, 6,16...Structure panel, 7,
17... Mounted equipment, 8... Heater control device, 9...
- Heater, 10... Equipment side temperature sensor, 11... Actuator side temperature sensor, 12.22... Container.

Claims (1)

[Claims] A thermal louver is equipped with a shutter-like movable blade that adjusts the amount of heat dissipated from a spacecraft by opening and closing operations, and an actuator for driving the blade that uses a bimetal that deforms in response to temperature changes as a driving force. A heat dissipation plate is attached to a part of the container for accommodating the actuator to dissipate the heat of the actuator to outer space, and a heater for warming the actuator is attached to the inside of the container. A heat insulating material is filled between the container and a frame surrounding the container to prevent heat radiation from the actuator, and an actuator-side temperature sensor that detects the temperature of the actuator and sends out a detection signal corresponding to the temperature is located inside the container. A device-side temperature sensor that detects the temperature of the on-board equipment mounted on the spacecraft and sends a detection signal corresponding to the temperature is attached to the on-board equipment, and the actuator-side temperature sensor and A heater control device is provided that controls the amount of heat generated by the heater by sending a control signal that matches the temperature of the actuator with the temperature of the mounted device by comparing both detection signals of the device-side temperature sensor. Features a thermal louver.