A water-cooled heat flow sensor

Abstract

The invention discloses a water-cooled heat flow sensor, which comprises: a front end cover welded on a rear cover; the rear cover has an inner chamber and an outer chamber, and a bottom of the inner chamber near one end of the front end cover is installed The front inner core; the outer chamber is welded with a water inlet pipe and a water outlet pipe; the front inner core is hollow inside, with an open top and a hole at the bottom, and a constantan plate is installed in the hole; the inside of the inner core The space is filled with heat-insulating paint; the top opening of the front inner core is installed with a heat-insulating sleeve; the rear inner core is welded to the end of the inner chamber of the rear cover away from the front cover; the double-core thermocouple wire is passed through the threading hole at one end Separated at the end; respectively welded with pure copper wire, one copper wire passes through the thermal insulation coating and welded on the constantan plate; the other copper wire is welded to the end face of the front inner core.

Description

technical field

[0001] The invention relates to a heat flow sensor, in particular to a water-cooled heat flow sensor. Background technique

[0002] The heat flow sensor is a basic tool used to measure heat transfer, mainly measuring heat flux density and heat flux, and is the basic component of a heat flow meter. Therefore, it plays the most critical role in measuring heat, and its performance and use determine the performance and use of the heat flow meter. At present, thermal resistance heat flow sensors are widely used in the market. The basic principle is that when heat flow passes through the heat flow sensor, a temperature gradient is generated on the thermal resistance layer of the sensor. According to Fourier's law, the heat flux density passing through the sensor can be obtained. At present, the accuracy of the heat flow sensor is often not enough, the main reason is that the thermal element is prone to heat exchange on the inner wall, which affects the accuracy. ...

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