SU991809A1 - Device for measuring cooling depth of thermoelectric filter coolers - Google Patents

Abstract

1. A DEVICE FOR MEASURING THE DEPTH COOLING OF THERMOELECTRIC PELTIE REFRIGERATORS, containing a measuring unit and a holder for fixing refrigerators, is located SESOKSHYZ i VLShTYTYO-. I. | D (.. ““ ”LMOS cold stoppers to the measurement unit, which means that, in order to reduce the error and the measurement time, it also contains an isothermal screen, in which placed a holder made in the form of a disk with circumferentially spaced sockets for fixing the measured and reference refrigerators, and a measuring unit containing a comparator with a sensor of negative radiant heat fluxes and an electromagnetic stepping finder, while the comparator is attached to the axis of the stepping finder with opportunity to zitsionnoy installation in front of the cold junctions of each of the sa-jg fixed in the nests of refrigerators

Description

2. The device according to claim 1, from which the comparator is used for measuring negative heat flux, anisotropic thermoelement.

one

The invention relates to the field of thermometry and can be used for express non-contact measurement of the cooling depth of Peltier refrigerators in the field of industrial and laboratory conditions.

At present, there are no devices and devices suitable for high-frequency and high-performance measurement of the depth of cooling of TChPs under mass production conditions.

The use of existing installations, instruments and methods for the contactless measurement of the depth of cooling in non-commercial ceramics does not lead to positive results.

It is known to use heat-sensitive paints for non-contact measurement of the cooling depth of TCP.

However, the measurements performed by this method are limited by the low accuracy (), as well as the lower limit of the temperature minus 40 s.

Closest to the present invention, there is a device for measuring the cooling depth of Peltier refrigerators containing a measuring unit and a holder for fixing refrigerators arranged with cold junction to the C 2J measuring unit. A holder with a single TCP is placed in a thermo-activating chamber. A metal thermocouple with a simulator of thermal load is attached to the cooled spa m TCP. The measurement unit contains a rectifier and millivoltmeter. The maximum cooling depth and the corresponding optimal HCP current are determined by the maximum value; Thermocouple EMF values.

However, the applied region setting gives a very low productivity, while the accuracy of determining the cooling depth is small (1.52 seconds). In addition, in the process of fixing a thermocouple with a thermal simulator and cooling the thermocouples, the latter, due to thermal shock and overheating of the frequencies, fail, which causes a decrease in the yield percentage by 30-35%.

The aim of the invention is to reduce the error and the time taken to measure the depth of the cooling of ATP.

This is achieved by the fact that a device containing a measuring unit and a holder for fixing refrigerators located in cold cams to a measuring unit contains an additional isothermal screen; in KtJTOpOM there is a holder made in the form of a disk with circumferentially spaced sockets for fixing measured and reference refrigerators. , and a measuring unit containing a negative radiant heat flux comparator and an electromagnetic stepping finder, wherein the comparator is attached to the axis of the stepping finder with the possibility of constant setting opposite each of the cold junctions locked in the receptacle of refrigerators. The surface area of the disk is selected from the condition 5 5op,

where 5 is the surface area of the disk; SQ is the surface area occupied by the reference cooler; .

P - the number of nests.

 In this case, an anisotropic thermoelement was used as a comparator sensor for measuring negative heat fluxes.

The proposed device is shown in the drawing.

The device consists of a metal disk-radiator 1, in which circumferentially through different angles in the sockets with the help of clamps 2 in the positions 1-ХИ1 there are fixed TPPZ 12 pieces measured and one reference. The surface area of the disk is 13 times larger than the surface area of the diffusing radiator 3, on which the reference cooler was calibrated. A thermal comparator of radiant energy 4 based on an anisotropic thermal sensor together with an indicator 5 of type 1MIG GOST 9096-7 is fixed via a metal lever b to the axis of a step finder 7 of type SHIV-25/3. The electrical leads of the CCP are located on the contacts 8 located on the block 9, made in the form of a disk made of electrical insulation

Claims (2)

1. A DEVICE FOR MEASURING THE COOLING DEPTH OF THERMOELECTRIC PELLETI REFRIGERATORS, comprising a measuring unit and a holder for fixing refrigerators located by a cold junction to the measuring unit, which is distinctive in that, in order to reduce the error and measurement time, it additionally contains the isothermal screen in which the holder is located, made in the form of a disk with fixation measured and refrigerators located around the circumference, and a unit holding a comparator with solid radiant heat fluxes and an electromagnetic Agov crawler, wherein the comparator is attached to the stepping axis with the possibility of positional setting opposite each of the cold junctions fixed in sockets refrigerators / nicks. sockets for reference measurement, negative sensor • 1st th 608166 PLB'® ¹ 'nd 2. The device according to π. 1, characterized in that an anisotropic thermoelement was used as a 'comparator sensor for measuring negative heat fluxes.