Precise powder supply device for acceleration dust collection testing of air conditioner heat exchanger

A powder supply device and heat exchanger technology, which is applied in heat exchange simulation, heat exchange equipment, evaporator/condenser, etc., to achieve the effect of simple and practical structure, strong operability, and simple and reliable standards

Active Publication Date: 2018-12-07
SHANGHAI JIAO TONG 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 simpl

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  • Precise powder supply device for acceleration dust collection testing of air conditioner heat exchanger
  • Precise powder supply device for acceleration dust collection testing of air conditioner heat exchanger
  • Precise powder supply device for acceleration dust collection testing of air conditioner heat exchanger

Examples

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Example Embodiment

[0030] Example one

[0031] figure 1 Shown is a schematic diagram of a precise powder supply device for accelerating dust accumulation test of an air conditioner heat exchanger according to a preferred embodiment of the present invention. It includes a rotating motor 1, a dust container 2, a mixing impeller blade 3, a miniature cylindrical straight cylinder 4, and dust Conveying pipe 5, sheet switch valve 6, stepping motor 7, powder blowing module, programmable controller 12, and dust chamber 13; the rotating shaft of the rotating motor 1 is connected with the mixing impeller blade 3; the dust holding container 2 has no cover at the upper end , The metal cylinder with a hole at the bottom, the mixing impeller blade 3 and the rotating motor 1 are installed in the dust container 2; the sheet switch valve 6 is close to the lower part of the dust container 2, including the upper circular plate valve 6a and the lower circular plate valve 6b; The miniature cylindrical straight cylinder...

Example Embodiment

[0035] Example two

[0036] figure 2 Shown is a partial disassembly diagram of a precision powder supply device for accelerated dust accumulation test 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 an upper circular plate valve 6a and a lower circular plate valve 6b with the same outer diameter.

[0037] In order to improve the dust flow efficiency of the dust containing container 2, the micro cylindrical straight tube 4 and the sheet switch valve 6, preferably, the micro cylindrical straight tube 4 is a cylindrical straight tube with no caps at both ends, and the position of the circular opening at the bottom of the dust containing container 2 is the same as The miniature cylindrical straight cylinder 4 has the same coaxial diameter; the upper circular plate valve 6a and the lower circular plate valve 6b each have a circular hole, and the position of the ci...

Example Embodiment

[0041] Example three

[0042] image 3 with Figure 4 They are respectively a schematic diagram of a dust adding process and a schematic diagram of a 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 engineering perspective, the lower limit of the dust concentration variation range is set to 100mg / m 3 , The upper limit is 140mg / m 3 . By 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 size specifications of the micro cylindrical straight ...

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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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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 JIAO TONG UNIV
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