SU519880A1 - Device for cooling radioelectrode devices - Google Patents

Description

one

The invention relates to a cooling technique and can be used for the thermal stabilization of elements of radio and electronic equipment, as well as in other branches of the national economy for similar purposes.

A device for cooling electronic devices is known, consisting of a deflection chamber of a cooling gas jet at the entrance of which a cooling gas supply nozzle is installed, and a nozzle at the exit, a radiator in the form of a finned housing with a capillary channel built into it, the input of which is connected to the supply nozzle cooling gas, and the output with the camera deflection jet of cooling gas 1.

The known device actually redistributes the cooling flow, directing more or less of it to the cooled element, depending on the temperature of the latter. In this case, regardless of whether the object is to be cooled slightly or intensively, the refrigerant is continuously consumed (released from the chamber to the atmosphere). This is a serious obstacle to the use of such a device in systems with limited power of gas sources and in systems with a limited supply of gas (for example, cooling systems for high-altitude aircraft, submarines, spacecraft, etc.).

The purpose of the invention is to reduce the flow rate of the cooling gas.

This is achieved by the fact that in the proposed device the chamber is made in the form of a cylinder, on the surface of which the outlet of the capillary channel and the socket are placed, the axis of the outlet part of the capillary channel is directed tangentially to the inner wall of the chamber, and the axis of the socket is radial.

FIG. 1, a-d presents the proposed device for cooling electronic devices; in fig. 2 shows the dependence of the refrigerant flow rate on the magnitude of the capillary flow rate.

The device (Fig. 1, a) consists of a cooled object 1, a radiator housing 2, a capillary channel 3 with an inlet 4 and an output end 5, a cylindrical chamber 6, a cooling flow nozzle 7, an output nozzle 8.

In the body of a finned radiator 2 installed on the cooled object 1, there is a capillary channel 3, through the inlet end of which a part of air is taken from the main cooling stream entering the chamber 6 through the nozzle 7.

Chamber 6 is a cylindrical duct, on the lower base of which an outlet nozzle 8 is mounted in the center, on the direct cooling flow to the object

1. The chamber 6 is connected with the atmosphere only through the outlet nozzle 8. A cooling flow supply nozzle 7 is introduced into the chamber radially through its side surface. The diameter of the nozzle 7 is equal to the height of the chamber 6. The output end 5 of the capillary channel 3 is inserted through the side surface of the chamber 6 along the tangent to it.

The device works as follows.

In the absence of flow through the capillary channel (no flow from port 7), the main coolant flow into chamber 6 through port 7 is directed through the outlet nozzle 8 to the object to be cooled (Fig. 1.6).

When flow from the output end 5 of the capillary channel 3 - tangential flow appears, the latter twists the main cooling flow in a spiral (Fig. 1, b), and due to a significant increase in the aerodynamic resistance of the chamber, the coolant flow rate decreases, i.e. the object cools less. With a further increase in the rate of the tangential flow, the main cooling flow is pressed by the tangential flow to the side surface of the chamber and almost locks the chamber (Fig. 1, d).

Due to the fact that the aerodynamic drag of a capillary depends on the temperature of the object being cooled, the age when the temperature of the object increases, the speed of the capillary flow is determined by the temperature of the object. As the temperature of object 1 increases, the aerodynamic resistance of capillary channel 3 increases, it is not able to reject the main cooling flow — object 1 is cooled intensively. With a certain decrease in the temperature of the object 1, the resistance of the capillary channel 3 decreases,

the aerodynamic resistance of the chamber. G, the coolant flow rate decreases — the object is cooled less intensively. With a sharp decrease in the temperature of object 1, the power of the capillary jet sharply increases, the main flow twists and closes the pipe of the main cooling flow — the cooling of the object stops and the flow rate of the refrigerant almost stops. For

optimal operation "of the vortex chamber 6; the ratio of the diameters of the nozzle of the main cooling flow and radius must be at least 1; 3.4. By thermostatting a cooled object, the device allows economical use of the refrigerant, which expands the scope of application.

Claims (1)

1. Auth. St. USSR № 418683, cl. F 25В 19/02, it is claimed 29.11.71.  S2ZZ2222 Y7 //// ///// X ( G / 0.080,16O.lt