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Detection device and method for measuring wall surface heat transfer coefficient of built-in ventilation pipeline

A technology for ventilation ducts and heat transfer coefficients, which is applied to a detection device for measuring the heat transfer coefficient of a wall surface containing a ventilation duct, and a detection device for measuring the heat transfer coefficient of a wall surface containing a ventilation duct, and can solve the problems of low detection accuracy and the like.

Pending Publication Date: 2021-04-30
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem of low detection accuracy of the existing wall heat transfer coefficient detection device containing ventilation ducts, the present invention provides a detection device and method for measuring wall heat transfer coefficients containing ventilation ducts

Method used

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  • Detection device and method for measuring wall surface heat transfer coefficient of built-in ventilation pipeline
  • Detection device and method for measuring wall surface heat transfer coefficient of built-in ventilation pipeline
  • Detection device and method for measuring wall surface heat transfer coefficient of built-in ventilation pipeline

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Embodiment 1

[0055] see figure 1 and figure 2 , this embodiment provides a detection device for measuring the heat transfer coefficient of a wall surface containing a ventilation duct, and the detection device is used to detect the heat transfer coefficient of a wall surface 6 to be tested of a ventilation duct 7 . Among them, the to-be-tested wall surface 6 containing the ventilation duct 7 can wrap the central duct, and its heat transfer coefficient is of great significance to the performance of the entire duct. In this embodiment, the detection device includes a clamping plate 1 , an environmental box 3 , a metering box 4 and a cold box 5 , and may also include a cross slide 2 .

[0056] The number of clamping plates 1 is two, and the two clamping plates 1 are arranged parallel to the wall surface 6 to be detected, and are respectively located on opposite sides of the ventilation duct 7 . The bottoms of the two clamping plates 1 can be connected through other structures, so that the ...

Embodiment 2

[0075] This embodiment provides a detection device for measuring the heat transfer coefficient of a wall surface containing a ventilation duct. The detection device is similar to that of Embodiment 1, except that two cross slides 2 are not provided in this embodiment. In this embodiment, the environmental box 3 and the cold box 5 do not move after being clamped by the two clamping plates 1 , but when they need to be moved, the two clamping plates 1 can be separated temporarily. In this way, the detection device of this embodiment has a simpler structure, which can save manufacturing costs. Moreover, multi-region detection can also be realized in this embodiment, and the detection range of the wall surface heat transfer coefficient can be expanded.

Embodiment 3

[0077] This embodiment provides a detection method for measuring the heat transfer coefficient of a wall surface containing a ventilation duct, which is applied to the detection device for measuring the heat transfer coefficient of a wall surface containing a ventilation duct in Embodiment 1 or 2. Wherein, the detection method includes the following steps.

[0078] Heating is performed by heater one 31 and heater two 41 , and the temperature of the sealed space one and the sealed space one is made consistent through the temperature control system 8 . For example, after heater 2 41 heats and makes the temperature in the inner box reach the specified temperature, in order to keep the internal and external temperatures consistent, the temperature control system 8 checks whether the temperature detected by temperature sensor 1 34 and temperature sensor 2 43 is the same. Same, temperature control system 8 will drive the heater in the space with lower temperature to heat up, make th...

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Abstract

The invention discloses a detection device and method for measuring the heat transfer coefficient of a wall surface internally provided with a ventilation pipeline. The device comprises two clamping plates, an environment box, a metering box and a cold box, wherein the environment box comprises an outer box body, a temperature sensor I, a temperature control system and a heater I, the metering box comprises an inner box body, a temperature sensor II, a soaking plate I, a heat flow meter I and a heater II, and the cold box comprises a refrigeration box body, a temperature sensor III, a refrigeration unit, a soaking plate II and a heat flow meter II; the temperature control system is used for driving the first heater to conduct heating so that the temperature of the first closed space can be the same as that of the second closed space; and the detection device calculates a heat transfer coefficient according to the thickness of the to-be-detected wall surface and the heat flow and temperature of the two opposite sides. The device is advantaged in that the principle that an existing temperature control box heat flow meter method is used for testing the heat transfer coefficient is utilized, the heat transfer coefficient of the wall face with the ventilation pipeline inside is detected, the application range of the temperature control box heat flow meter method is expanded, detection precision is improved, and the detection range is expanded.

Description

technical field [0001] The invention relates to a detection device in the technical field of heat transfer coefficient detection, in particular to a detection device for measuring the heat transfer coefficient of a wall surface containing a ventilation duct, and also to a detection method for measuring the heat transfer coefficient of a wall surface containing a ventilation duct. Background technique [0002] Ventilation pipes are metal or composite pipes used in ventilation and air-conditioning engineering of industrial and civil buildings. They are a municipal infrastructure for air circulation and reduction of harmful gas concentrations. The contained ventilation duct is a type of ventilation duct, which has a wall to be inspected and an internal duct. Detecting the heat transfer coefficient of the wall to be detected is beneficial to better grasp the performance parameters of the ventilation duct, but the existing detection devices have large detection errors, so the det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 柯庆镝黄杰黄海鸿姜丰杨杰
Owner HEFEI UNIV OF TECH