JPS594860A - Cooling device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device that is mainly used to cool objects to be cooled, such as infrared sensors, which are installed on flying objects such as missiles.

For example, some air-to-air missiles use an infrared sensor to detect the infrared rays emitted from the exhaust port of a combat aircraft, detect the position of the aircraft, and track the aircraft based on the detection signal. So that you can shoot down! There is a strainer. Incidentally, infrared sensors used for such purposes must be kept cooled to about -196° C. otherwise they will pick up noise and will not be able to perform a sufficient detection function. Therefore, such missiles are equipped with a cooling device for cooling the infrared sensor.

However, since this conventional transcooling device is a combination of Jeanil Thomson valves and heat exchangers with complicated shapes, it is difficult to downsize and adapt over time. Therefore, there is a problem in that installing such a device increases the overall size and cost of the missile. These inconveniences also become a problem when this device is applied to equipment other than missiles.

The present invention has been made in view of these circumstances, and aims to easily eliminate the above-mentioned disadvantages by skillfully combining the portex tube and ordinary heat exchange means. The present invention provides a strainer cooling device.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

High-pressure gas source, for example, high-pressure N2fj gas source of about 40 atmospheres
The outlet 1a of the gas tank 1 filled with N is connected to the nozzle 3a of the portex duplex 3 via the air supply line 27/, and the N discharged from the gas outlet 1a is
1 so that 2 gas a is sequentially supplied to fnl nozzle 8a +
It's straining. Three portex tubes The nozzle 3a is opened in the vicinity of one end of the hollow cylindrical tube body 3b, and the nozzle 3a is oriented tangentially.
A low temperature gas outlet 3C having an orifice is provided at the center of one end face, and a continuous annular high temperature gas outlet 8 is provided at the peripheral edge of the other end face.
d is provided. And this portex tube 3
The infrared sensor 4 has the low temperature gas outlet 3C as the object to be cooled.
The low-temperature gas discharged from the low-temperature gas outlet 3C is communicated with the chamber 5 in which the
The chamber 5 is configured such that it can be introduced into the chamber 5.
The low-temperature gas C inside is evacuated to the atmosphere through an exhaust line 6. In the middle of this exhaust system path 6, there is a heat exchanger for performing heat exchange between the low temperature gas C flowing through the exhaust system path 6 and the gas a flowing within the air supply system path 2. 7 is provided. This heat exchanger 7 has a normal configuration, but if necessary, a regenerator may be added to the heat exchanger 7.Next, the operation of this device will be explained.

When the gas outlet 1a of the gas tank 1 is opened, high-pressure N2 gas a is guided from the tank 1 through the air supply line 2 to the nozzle 3al of the portex tube 3, and introduced from the nozzle 3a into the tube body 3b. be done. The gas a introduced into the tube body 3b rotates in a spiral at high speed along the inner surface of the circumferential wall of the tube body 8b, and then flows along the inner surface of the circumferential wall to the hot gas outlet 3d.
High-temperature gas b flows in the direction and is discharged to the outside as it is from the outlet 3d, and low-temperature gas b expands near the axis of the tube body 8b and flows along the axis in the direction of the low-temperature gas outlet 8C. It is separated by 1. The low-temperature gas C is discharged to the outside of the bolt tube 8 through the outlet 3C, and is guided into the chassis 5 to cool the infrared sensor 4. Next, this low-temperature gas C is introduced into the heat exchanger 7, exchanges heat with the gas a in the air supply line 2 passing through the heat exchanger 7, and then is released into the atmosphere. . the result,
The gas a flowing through the air supply line 2 is precooled before being supplied to the portex tube 8. When this pre-cooled gas C is separated in the portex tube 3, the low temperature gas C released from the low temperature gas outlet 3C is lower in temperature than the initially released low temperature gas C. Become. As heat exchange is carried out in this way, the low-temperature gas C released from the portex tube 3 gradually reaches a predetermined temperature (for example, about -196°C). It will reach +. Then, the infrared sensor 4 can be continued to be cooled at that temperature.

Note that the high-pressure gas source is not limited to a gas tank, and the gas supplied to one portex tube is not limited to one N2 gas. Although a case has been described in which precooling is performed from one single-stage heat exchanger, the present invention is of course not limited to this type of heat exchanger. Good too.

That is, what is shown in FIG.
By providing this, a portion of the exhaust system path 6 located between the above-mentioned clear exchangers 7/, 7//; It is strained to replenish the amount of water. By rubbing I in this way, even the high temperature gas B released from the portex tube 8 may become below room temperature, so the bottom line is:
The high-temperature gas C may also be used for pre-cooling the gas a.

Furthermore, the object to be cooled is not limited to an infrared sensor, and the application is not limited to one for use in an automatic missile tracking device.

As explained above, the present invention provides heat generation between the gas supplied from the high-pressure gas source to the portex tube and the low-temperature gas released from the portex tube after cooling the object to be cooled. Since the structure is configured so that the gas can be precooled by exchanging the gas, it is possible to exhibit a higher cooling capacity than the extremely simple structure F, and it is possible to provide a small, compact, and inexpensive cooling device. f).

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing one embodiment of the present invention. Fig. 2 is a partially cutaway perspective view showing a portex tube in the same embodiment. Fig. 3 is a schematic diagram showing another embodiment of the present invention. It is. ■...High pressure gas source (gas tank) 3...Portex tube 4...Object to be cooled (infrared sensor) 71.7', 7"...Heat exchanger a...Gas (N2 gas) b...High-temperature waste Figure 1 C...Low-temperature gas agent Patent attorney Hiroshi Akazawa Figure 3

Claims (1)

[Claims] A high-pressure gas source, a portex tube that separates the gas supplied from the high-pressure gas source into high-temperature gas and low-temperature gas and releases the low-temperature gas to cool the object to be cooled; and a heat exchanger for precooling the gas supplied to the portex tube by performing heat exchange between the low temperature gas supplied to the portex tube from the high pressure gas source. A cooling device featuring: