SU624103A1 - Heating pipe - Google Patents

Claims (2)

FIELD OF THE INVENTION The invention relates to the field of heat engineering, namely to heat exchangers. Thermal, containing body and fixedly mounted screw screw with blades having variable pitch and height l are known. A disadvantage of the known pipes is low heat transfer characteristics. ki The closest technical solution to the present invention is a heat pipe, comprising a housing and an axially oscillating movement along its axis, a hollow screw with loiast, having variable pitch and height 2J. The disadvantages of this heat pipe are low heat transfer characteristics due to the considerable thickness of the liquid film in the condensation zone and the limited capacity when the condensate is returned to the evaporation zone. The purpose of the invention is to improve the heat transfer characteristics. The goal is achieved by the fact that in the proposed pipe the auger at one end is provided with a hollow ferromagnetic insert, and the housing from the outside in the area of the insert solenoid; At the other end of the screw, the diaphragm pump is fastened and the cavity of the screw is connected to its discharge side, and the pump membrane is connected tightly to the housing, the blades of the screw in the area adjacent to the pump are made with holes directed in the opposite direction, and the screw with radial gaps and longitudinal channels communicating with the apertures of the blades. The drawing shows a longitudinal section of the described heat pipe. The heat pipe includes a housing 1, along the axis of which a hollow auger 2 is installed with the possibility of axial oscillatory mixing. The screw has a cavity 3 and blades 4. In the upper part of the housing 1 there is an evaporation zone 5 with a capillary structure 6, a solenoid 7, a ferromagnetic insert 8 of the screw 2 and a distribution chamber 9 separated from the evaporation dona 5 by a partition 1O. The condensation zone 11 is located in the lower part of the heat pipe, and coolant 12 is poured into it. Diaphragm pump 13 is immersed in coolant 12, equipped with a membrane 14 attached to the housing 1. t gsy 15. The pump contains suction and pressure valves 16 and 17. in the area adjacent to the pump, the blades of the screw have radial slots 18, connecting holes 19 on the surface of the blades directed to the side opposite to the pump with longitudinal channels 20. The pipe body 1 between the evaporation and condensation areas is covered with heat tion 21 of the heat pipe works as follows. When a pulsating voltage is applied to the solenoid 7, the ferromagnetic insert 8 and the hollow cheek 2 associated with it are oscillating along the axis of the screw. In this case, oscillations are transmitted to the membrane 14 attached to the body of 1 ton gsj 15. Due to the vibrations of the membrane, coolant 12 flows through the suction valve 16 into the pump 13 and is pushed out through the pressure valve 17 into the cavity 3 of the screw 2. into the distribution chamber 9, separated from the evaporation zone 5 by the partition 10. From the distribution chamber 9, the coolant is distributed through the capillary structure 6 in the evaporation zone 5. When heat is applied to the evaporation zone 5, evaporation of the coolant occurs and the steam moves towards the condensation zone 11. Due to the blades 4 of the screw 2, steam is twisted, which significantly intensifies the heat exchange processes in the condensation zone, especially in the presence of non-condensing gases in the pipe. To maintain a high vapor velocity in the condensation zone, the pitch and height of the blades 4 are reduced in the direction of flow of the steam flow. In the condensation zone 11, the coolant flows under the action of the forces of gravity along the inner hundreds of the housing 1 in the form of a film. thickening thickness. The thermal resistance of a heat pipe in many respects is determined by the thickness of the heat transfer film on the surface of the zone of condensation. In a heat pipe, the thickness of the heat transfer film in the condensation zone is determined by the gap between the blades 4 of the screw and the inner surface of the wall of the housing 1. All excess liquid will be removed during axial vibration of the screw 2. The coolant removed from the wall of the housing 1 gets onto the surface of the blades of the screw and through holes 19, the radial slits 18 and the longitudinal channels 20 flows into the lower part of the housing 1. Partially coolant also flows down and along the surface of the blades of the screw. It should be noted that the screw 2 and the pump 13 can be cast from light metals (aluminum) or plastic. Due to the axial vibration of the screw, the minimum thickness of the condensate film in the condensation zone is maintained, the thermal resistance is reduced and the productivity is increased when the condensate returns to the evaporation zone, i.e., the heat transfer characteristics are improved. Formula of Invention Heat pipe containing an axial oscillatory movement across its axis a hollow auger with blades having variable pitch and height, about t; j, and with the fact that, in order to improve the heat transfer of these actions, the screw at one end is provided with a hollow ferromagnetic insert, and the housing from the outside at the insertion site is provided with a solenoid, at the other end of the screw the diaphragm pump is fixed and the screw cavity is connected to its discharge side, and the pump membrane is connected tightly to the housing; The area adjacent to the pump is made with openings directed to the opposite side of the stator, and the screw is provided with radial gaps and auger channels communicating with the openings of the blades. Sources of information taken into account during the examination: 1. Author's certificate No. 31 3040, cl. F 25 V 19/04, 1 970. 2. The author's certificate number 498460, cl. F25 B 19/02, 1973. - S w 12 / J L