JP2592869B2 - Heat exchange equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial Application Field) The present invention relates to a heat exchange suitable for performing heat control of space use equipment mounted on a space vehicle such as an artificial satellite. Related to the device.

(Prior Art) In general, space use equipment mounted on a spacecraft is used in a space environment in which temperature changes drastically. Therefore, it is necessary to perform thermal control to ensure operation reliability. As a heat control means for such a space use equipment, there is a heat control means using a heat exchange device of a fluid loop heat exhaust system using a heat exchanger called a cold plate. In this heat exchange device, a space use device is mounted on the heat exchanger, and heat is directly taken from the space use device to control the heat to a desired temperature.

FIG. 3 and FIG. 4 show the main parts of such a heat exchanger. FIG. 3 shows a plate fin type, and FIG. 4 shows a tube type.

That is, the heat exchange device shown in FIG.
The refrigerant liquid is passed between the fins 2 using a heat exchanger having the fins 2 sandwiched between the fins 2a and 1b, so that the support member 1
The heat of the space use equipment (not shown) mounted on a, 1b is transmitted to the refrigerant liquid via the support members 1a, 1b and the fins 2, and this heat is transported as sensible heat by forced convection to perform heat control. Do.

Further, the heat exchange device of FIG. 4 has a pair of support members 1a, 1b.
The refrigerant liquid is passed through the tube 3 using a heat exchanger having the tube 3 sandwiched between the support members 1a, 1b.
The heat of the space equipment (not shown) mounted on the
The heat is transmitted to the refrigerant liquid via the tubes 1 and 1b and the tube 3, and the heat is transferred in the state of sensible heat by forced convection to perform heat control.

However, in the above heat exchange device, since the gas-liquid mixed phase region is distributed in the refrigerant liquid in the fins 2 and the tubes 3, when the heat exchange device is configured to be applied to heat control of a large space use device, the weightlessness of the space environment is Due to the influence of the field, bubbles may be abnormally generated in the gas-liquid mixed phase region, which may cause a decrease in thermal efficiency. In addition, it is expected that an unstable phenomenon such as vibration occurs due to the occurrence of bubbles, or the situation at the refrigerant liquid outlet changes suddenly, making accurate heat control difficult.

(Problems to be Solved by the Invention) As described above, in the conventional heat exchange device, due to its configuration, anomalies are generated in the gas-liquid mixed phase region in the zero-gravity field of outer space, and vibrations and the like are generated. Therefore, accurate heat control may be difficult.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat exchange device that can simplify the configuration, increase the efficiency of heat control, and realize accurate heat control. And

[Structure of the Invention] (Means for Solving the Problems) The present invention has a plurality of communication holes formed in a peripheral portion more densely in a direction from an intermediate portion to another end portion than one end portion in an axial direction, A heat exchanger comprising a plurality of rows of heat transfer paths arranged in parallel with a liquid passage communicating with the vapor path whose other end is connected to the liquid supply source through the communication hole; And a first liquid supply means for supplying a refrigerant liquid to one end of the liquid passage, and a refrigerant supply medium connected to the liquid supply source and provided at an intermediate portion of the liquid passage corresponding to a dense position of the communication hole. A second liquid supply unit for supplying a liquid, a temperature detection unit for detecting a temperature of the heat exchanger, and the second liquid supply unit in response to a detection value of the temperature detection unit.
And a control means for controlling the liquid supply means and controlling the supply amount of the refrigerant liquid.

(Operation) According to the above configuration, when the amount of heat generated by the space use equipment increases, the control means responds and activates the second liquid supply source, and the supply amount of the refrigerant liquid in the intermediate portion of the liquid passage increases. You. at the same time,
The liquid passage has a high temperature rise rate and easily generates bubbles.Even when bubbles are generated in the refrigerant liquid from the middle portion to the other end portion, the refrigerant liquid is reliably supplied to the inner peripheral wall of the vapor passage through the communication hole. Done. As a result, the temperature of the heat exchanger can be made uniform, so that efficient heat control can be realized with the minimum source refrigerant liquid,
In addition, the capacity of the liquid supply source can be reduced.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a heat converter according to one embodiment of the present invention. In the figure, reference numeral 10 denotes a heat exchanger in which a plurality of heat transfer paths 11 are arranged, and a plurality of space use equipments 12 are mounted. This heat transfer path 11
As shown in FIG. 2, a vapor passage 13 and a liquid passage 14 are provided side by side. Among them, the steam passage 13 has a plurality of guide grooves 13a, which are called groups, formed in the inner peripheral wall so as to extend in the axial direction. At a predetermined position, for example, from the substantially central portion to the other end portion, and is communicated with the liquid passage 14 through the communication hole 15. A steam outlet 16 is formed at the other end of the steam passage 13, and the steam outlet 16 is connected to a coolant supply source via a radiator (not shown). Further, a first liquid supply part 17 is formed at one end of the liquid passage 14, and a second liquid supply part 18 is provided at a predetermined position in an intermediate part thereof, for example, at a substantially central part, in a dense part of the communication hole 15. Is formed in correspondence with. An outlet of a header 19 connected to a vapor liquid supply source (not shown) is connected to the first liquid supply section 17 via a supply pipe 20a. The outlet of the header 19 is connected to the second liquid supply section.
18 is connected via a supply pipe 20b and a flow control valve 21.
The flow control valve 21 is connected to a control device 22, to which an output terminal of a temperature detection sensor 23 is connected. The temperature sensor 23 detects, for example, the temperature of the space use equipment 12 to detect the temperature of the heat exchanger 10, and outputs a detection signal to the control device 22.

In the above configuration, when performing heat control of the space use equipment 12, first, a coolant liquid is supplied to the header 19 from the liquid supply source (not shown), and the refrigerant liquid is supplied to the header 19 via the first and second liquid supply units 17 and 18. The liquid is supplied to the liquid passage 14. Then, the refrigerant liquid in the liquid passage 14 is guided to the inner peripheral wall of the vapor passage 13 through the communication hole 15 and moves in the guide groove 13a in the axial direction while removing the heat of the space use equipment 12 to become steam. Is transported in the state of latent heat to perform heat control of the space use equipment 12. Then, the vapor is guided to a radiator (not shown) through the vapor outlet section 16 to release the taken heat, becomes a refrigerant liquid again, and is guided to a liquid supply source (not shown). At this time, the flow control valve 21 of the second liquid supply unit 18 is controlled to a predetermined valve opening degree via the control device 22 in accordance with the detection signal of the temperature detection sensor 23.

Then, when another space use device 12 on the heat exchanger 10 is moved to increase the heat generation density, first, the temperature on the heat exchanger 10 increases. Then, this temperature rise is detected by the temperature detection sensor 23, and the detection signal is sent to the control device 22.
The control device 22 controls the valve opening of the flow control valve 21 to increase the supply amount of the refrigerant liquid. Thereby, the liquid passage
14 is such that the supply amount of the refrigerant liquid from the second liquid supply unit 18 is increased, and the temperature from the substantially central portion where the temperature rise rate is high to the other end is maintained at substantially the same temperature as the one end, The generation of bubbles due to the rise is suppressed. At the same time, the refrigerant liquid in the liquid passage 14
A large amount is guided to the steam passage 13 from the dense portion, and the temperature at the other end side from the substantially central portion where the temperature rise rate is high is controlled to substantially the same temperature as the one end portion side, for example, even when bubbles are generated The outflow of the air bubbles is performed quickly. Thus, even when the operation status of the space use equipment 12 is changed, the temperature of the heat exchanger 10 is rapidly increased, so that the space use equipment 12
Heat control.

Further, when the operating state of the space use equipment 12 is reduced, the temperature detection sensor 23 detects this and performs the reverse operation to the above-described case of the temperature rise. The supply amount of the refrigerant liquid is reduced.

As described above, the heat exchange device supplies the supply amount of the refrigerant liquid from the substantially central portion to the other end portion of the liquid passage 14 having a high temperature rising rate according to the operation state of the space use equipment 12 mounted on the heat exchanger 10. And the communication hole 15 between the vapor passage 13 and the liquid passage 14 is formed closer to the other end than the center in the axial direction. According to this, as the temperature of the heat exchanger 10 rises, air bubbles are first generated. Even in this case, the air bubbles are densely formed from the substantially central portion of the liquid passage 14 to the communication hole 15 formed on the other end side. Is efficiently guided to the steam passage 13 for elimination, thereby preventing a local temperature rise due to the generation of bubbles. On the other hand, by automatically controlling the amount of the refrigerant liquid supplied to the substantially central portion having a high temperature rise rate in accordance with the temperature of the heat exchanger 10, it is possible to prevent the generation of bubbles due to the temperature rise. It is possible to achieve accurate and efficient thermal control.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[Effects of the Invention] As described in detail above, according to the present invention, there is provided a heat exchange apparatus that can simplify the configuration, increase the efficiency of heat control, and realize accurate heat control. can do.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a heat exchange device according to an embodiment of the present invention, FIG. 2 is a perspective view showing a heat transfer path of FIG. 1 taken out,
3 and 4 are perspective views showing a conventional heat exchange device. 10 heat exchanger, 11 heat transfer path, 12 space use equipment,
13 ... steam passage, 13 a ... guide groove, 14 ... liquid passage, 15 ...
... Communication hole, 16 ... Steam outlet, 17,18 ... First and second
Liquid supply section, 19 ... head, 20a, 20b ... supply pipe, 21 ...
... Flow control valve, 22 ... Control device, 23 ... Temperature detection sensor.

Continued on the front page. (72) Ryoichi Imai 2-1-1, Sengen Sakuramura, Niigata-gun, Ibaraki Pref. Japan Space Development Agency Tsukuba Space Center Inside the Toshiba Komukai Plant (72) Inventor Minoru Komori 1st Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Komukai Plant (72) Inventor Shigeto Oshima Toshiba, Koyuki-ku, Kawasaki-shi, Kanagawa Prefecture (72) Inventor Yuji Yuji Well 1 in Komukai Toshiba Town, Koyuki-ku, Kawasaki-shi, Kanagawa Prefecture

Claims (1)

(57) [Claims] 1. A vapor passage having a plurality of communicating holes formed in a peripheral portion from an intermediate portion to an other end portion in a direction closer to an axial end portion than the one end portion, and the other end portion connected to a liquid supply source. A heat exchanger having a plurality of rows of heat transfer paths arranged in parallel with liquid passages that communicate with each other via the communication holes; and a refrigerant liquid connected to the liquid supply source and having one end of the liquid passages. A second liquid supply unit connected to the liquid supply source and supplying the refrigerant liquid to an intermediate portion of a liquid passage corresponding to a dense position of the communication hole; Temperature detecting means for detecting the temperature of the heat exchanger, and control means for controlling the second liquid supply means in response to the temperature detection means and controlling the supply amount of the refrigerant liquid. And heat exchanger.