An asymmetrical hot plate apparatus
A hot plate instrument, asymmetric technology, applied in the field of fabric thermal resistance measurement, can solve the problems of temperature control inconsistency between the hot plate and the bottom heat guard plate, system error of the thermal structure design of the hot plate instrument, and measurement result error, etc., to eliminate Effects of system error, energy consumption reduction, and structure simplification
Inactive Publication Date: 2016-04-06
DONGHUA UNIV
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Problems solved by technology
However, the actual use shows that there is a large systematic error in this type of design, which may be due to the inconsistent temperature control of the measuring hot plate and the bottom heat shield. Convective heat exchange, so that the measurement results have a large error, which may be larger under the condition of a wind speed of 1m / s
But the test results show that different hot plate instruments can differ by 30% or more, the inventor thinks that this is caused by the system error caused by the defective thermal structure design of the hot plate instrument
Method used
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[0012] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
[0013] Embodiments of the present invention relate to an asymmetric hot plate apparatus, such as figure 1 and figure 2 As shown, the measurement hot plate 11 is included, and the measurement hot plate 11 is located in the middle of the heat shield 8, and is on the same plane as the heat shield 8, and the measurement heat plate 11 and the heat shield 8 are respectively installed On the inner frame 4 and the outer frame 7, the...
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Abstract
An asymmetric hot plate instrument comprises a measure hot plate which is disposed at the center of a hot protective plate and at the same plane with the hot protective plate; the measure hot plate and the hot protective plate are respectively installed on an inner framework and an outer framework, and are separated by a heat insulating strip disposed therebetween; a measure hot plate heating membrane is attached to the measure hot plate, and a hot protective plate heating membrane is attached to the lower side of the hot protective plate; the hot protective plate and the measure hot plate are both provided with temperature sensors; the lower side of the measure hot plate heating membrane is provided with a temperature sensor; the lower sides of the measure hot plate heating membrane and the hot protective plate heating membrane are provided with thermal insulation plates and foam plates with known thermal resistance; the temperature sensor is arranged under the measure hot plate and on the upper surface of the foam plate; the lower surface of the foam plate is exposed in an air layer, and the air layer has thickness of more than 10 cm. The asymmetric hot plate instrument helps to simplify the structure, reduce energy consumption, eliminate probabilistic system error and make the thermal resistance measure of fabrics more accurate, and does not need standard sample calibration.
Description
technical field [0001] The invention relates to the technical field of fabric thermal resistance measurement, in particular to an asymmetric hot plate instrument. Background technique [0002] ASTMD1518 hot plate instrument is a widely used hot plate instrument for fabric thermal resistance measurement. The measuring hot plate adopts a thin plate structure, and the upper heat protection plate also adopts a thin plate structure. It is in the same plane as the measuring hot plate, and the adjacent edges are formed by Separated by heat insulation strips; the bottom heat shield is also a thin plate structure, its area is equal to the sum of the measuring heat plate and the upper heat shield, and is parallel to the measurement heat plate and the upper heat shield, and the upper and lower heat shields are heat insulating cavities . When the temperature control of the upper heat protection plate and the lower heat protection plate are consistent, the heat flow of the measurement h...
Claims
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IPC IPC(8): G01N25/20
Inventor 陈益松詹卓
Owner DONGHUA UNIV