SU1485007A1 - Heat pipe - Google Patents

Description

The invention relates to heat engineering, in particular to adjustable heat transfer devices - thermostats.

The purpose of the invention is to improve the accuracy of temperature control. five

FIG. 1 schematically shows a heat pipe, a longitudinal section; in fig. 2 - layout of temperature and pressure sensors and pressure regulator.

The heat pipe contains a sealed enclosure! with zones 2 and 3 of evaporation and condensation, respectively, the first of which is provided with a heat source 4, and the second with a fridge in the form of a thermopile,

5. Inside the housing 1 there is a thermostatted object 6, enclosed in a hermetic shell 7 with double walls, the gap between which is filled with a substance in the triple point state (in the operating mode of the pipe). The shell 7 is separated from the zones 2 and 3 of evaporation and condensation by a coaxial evacuated screen 8, and the gap between the screen and the object 6 is in communication with the zones of condensation and evaporation by the steam line 9 (in the form of a gap gap) and the condensate line 10, respectively. On the shell 7 are placed the pressure regulator 11 and the pressure sensors 25 12 and 13, respectively, the latter being connected to the regulator 11, the heat source 4 and / or the cooler through the control unit 14. The pressure regulator 11 is in the form of an auxiliary heat pipe'15, separated by a membrane 16 from the shell 7 and having thermal insulation. The pipe can have multiple screens 8.

Heat pipe works as follows.

When heat is applied to the evaporation zone 2, the coolant boils and its steam enters the condensation zone 3, where part of the steam stream condenses and flows down, and part of the steam line 9 passes to the thermostatted object 6, heating it, and the steam condenses on the surface of the sealed shell 7 and flows through the condensate line 10 into the evaporation zone 2, and there is no possibility of direct steam from the evaporation zone 2 to the thermostatically controlled object 6. After the object 6 reaches the state of thermodynamic equilibrium, the heat exchange to 7 is stopped and the gap between it and the screen 8 is filled with saturated steam at the temperature of temperature, the state of the triple point of the substance in the shell 7 is maintained with the help of pressure regulator 11, sensors 12 and 13 of temperature and pressure, respectively, and heat source 4.

fig.g

Claims (2)

1. HEAT PIPE, containing a sealed enclosure with zones of evaporation and condensation, the first of which is provided with a heat source, and the second - with a refrigerator, and a thermostatted object placed inside the enclosure, enclosed in a sealed enclosure with double walls 2 Kami, the gap between which is filled with substances with the temperature of the phase transition lying inside the interval of temperature, the shell is equipped with a pressure sensor having feedback from the heat source or refrigerator, characterized in that, in order to improve the accuracy of temperature, the temperature-controlled object is separated from the evaporation zones and condensation with at least one coaxial evacuated screen, and the gap between the screen and the object is in communication with condensation and evaporation zones. 2. Pipe on π. 1, characterized in that it additionally contains a temperature sensor, a pressure regulator and a control unit, the sensors being installed on the shell and connected to the regulator, a heat source and a cooler through the 1 ^ control unit. IV azig.1 1485007 1485007