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A precise powder supply device for accelerated dust accumulation test of air conditioner heat exchanger

A powder supply device and heat exchanger technology, applied in heat exchange simulation, heat exchange equipment, lighting and heating equipment, etc., to achieve the effect of strong operability, simple and practical structure, simple and reliable standard

Active Publication Date: 2020-07-10
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to design an accurate powder supply device for accelerated dust accumulation testing of air-conditioning heat exchangers, which can simply and reliably make the dust be completely pushed out without sticking On the surface of the container, so as to meet the requirements of precise control of dust concentration, while avoiding manual powder addition, saving manpower input and improving test efficiency

Method used

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  • A precise powder supply device for accelerated dust accumulation test of air conditioner heat exchanger
  • A precise powder supply device for accelerated dust accumulation test of air conditioner heat exchanger
  • A precise powder supply device for accelerated dust accumulation test of air conditioner heat exchanger

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Embodiment 1

[0031] figure 1 Shown is a schematic diagram of a precise powder supply device for an air conditioner heat exchanger accelerated dust accumulation test according to a preferred embodiment of the present invention, including a rotating motor 1, a dust container 2, a mixing impeller blade 3, a miniature cylinder 4, a dust Conveying pipe 5, sheet switch valve 6, stepper motor 7, powder blowing module, programmable controller 12 and dust accumulation chamber 13; the rotating shaft of rotating motor 1 is connected with mixing impeller blade 3; the dust holding container 2 has no cover on the upper end 1. A metal cylinder with a hole in the bottom, the mixing impeller 3 and the rotating motor 1 are installed in the dust container 2; the sheet switch valve 6 is close to the bottom of the dust container 2, including the upper disc valve 6a and the lower disc valve 6b; the miniature cylinder 4 is a cylinder without a cover at both ends, and the upper end and the lower end of the miniat...

Embodiment 2

[0036] figure 2 Shown is a partially disassembled diagram of an accurate powder supply device for testing accelerated dust accumulation of an air conditioner heat exchanger according to another preferred embodiment of the present invention. In this embodiment, the sheet-shaped switch valve 6 is composed of two upper and lower disc valves 6 a and lower disc valves 6 b with the same outer diameter.

[0037] In order to improve the dust flow efficiency of the dust holding container 2, the miniature cylindrical straight barrel 4 and the sheet switch valve 6, preferably, the miniature cylindrical straight barrel 4 is a cylindrical straight barrel without a cover at both ends, and the position of the circular opening at the bottom of the dust holding container 2 is in line with the The miniature cylindrical cylinder 4 is coaxial and has the same diameter; the upper disc valve 6a and the lower disc valve 6b each have a circular hole, and the circular hole position of the lower disc ...

Embodiment 3

[0042] image 3 and Figure 4 They are respectively the schematic diagram of the dust adding process and the dust unloading process of another preferred embodiment of the present invention. In order to specifically illustrate the parameter design process of the equipment parameters of the corresponding device of the present invention based on specific working conditions, this embodiment provides a typical working condition and matching parameters:

[0043] In this embodiment, the volume of the dust chamber 13 is designed to be 10 cubic meters, and the dust concentration is set to 120 mg / m 3 . From the perspective of engineering practice, the lower limit of the dust concentration range is set to 100mg / m 3 , the upper limit is 140mg / m 3 . Through formula 10(m 3 )×(140-100)(mg / m 3 )=0.4(g), it can be seen that the maximum amount of dust that can be added at a time is 0.4g.

[0044] Therefore, the dimensions of the miniature cylinder 4 are designed to have an inner diamete...

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Abstract

The invention discloses a precise powder supply device for acceleration dust collection testing of an air conditioner heat exchanger, and relates to the field of dust testing of the air conditioner heat exchanger. The device comprises a dust holding container, a mixed impeller piece, a rotating motor, a micro cylindrical straight cylinder, a flaky switch valve, a dust conveying pipe, a stepper motor, an airflow air guide pipe, an air valve, an air pump, a dust concentrator, a programmable controller and a dust collecting chamber. The rotating motor and the mixed impeller piece are used for preventing dust bonding on the wall surface of the dust holding container; dust of the micro cylindrical straight cylinder is totally conveyed into the dust collecting chamber through a dust blowing module; and based on feedback control, when the concentration of the dust in the dust collecting chamber is reduced to an appointed threshold, the dust is quantitatively fed by using the micro cylindricalstraight cylinder with specific capacity to maintain a dust containing environment with higher, stable and invariable dust concentration in the dust collecting chamber. The device is simple and reliable in standard, high in operability and particularly suitable for micro and precise powder supply places easy to bond with the dust.

Description

technical field [0001] The invention relates to the field of dust testing of air-conditioning heat exchangers, in particular to an accurate powder supply device for accelerated dust accumulation testing of air-conditioning heat exchangers. Background technique [0002] Since the performance of the air conditioner will be attenuated due to the dust on the surface of the heat exchanger during long-term use, the performance test of the air conditioner requires not only testing the performance of the new air conditioner when it leaves the factory according to the national standard, but also the performance of the air conditioner. Long-term running performance is tested. In order to quickly test the long-term performance of the air conditioner, the key is to accelerate the simulation of natural dust accumulation for the air conditioner heat exchanger. [0003] The key to accelerating the simulation of the natural dust accumulation process for air conditioner heat exchangers is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B39/00F28F27/00
CPCF25B39/00F28F27/00F28F2200/00
Inventor 丁国良胡尊涛詹飞龙庄大伟
Owner SHANGHAI JIAOTONG UNIV
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