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Electronic expansion valve flowing character test table control system by liquid ring method

A technology of electronic expansion valve and flow characteristics, which is applied in the direction of mass flow measurement devices, measuring devices, instruments, etc., can solve the problems of reducing the overall energy consumption of the test bench, so as to save experimental costs, reduce energy consumption, facilitate operation and workload Effect

Inactive Publication Date: 2005-03-02
SHANGHAI JUNLE REFRIGERATION CONTROL +1
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AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the deficiencies and defects existing in the existing test standards, and provides a liquid ring method electronic expansion valve flow characteristic test bench control system for simulating the throttling process of the refrigeration system
It replaces the compressor of the refrigeration system with a magnetic pump, which not only solves the problem of refrigerant lubricating oil, but also can test the flow characteristics of various refrigerants, and greatly reduces the overall energy consumption of the test bench. It has become an expansion valve manufacturer to measure product capacity and flow rate. Ideal setup for characterization studies

Method used

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  • Electronic expansion valve flowing character test table control system by liquid ring method

Examples

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Embodiment

[0016] Example: Measurement of the flow characteristics of the electronic expansion valve DPF2.2 with a full opening of 500 pulses under standard air-conditioning conditions

[0017] Install the electronic expansion valve to be tested in the test circuit, and then set the opening of the expansion valve to 500 pulses through the PC, set the temperature of the refrigerant at the inlet of the expansion valve to 38°C, and the pressure to 16.487 Bar. The temperature of the cold water tank is set at 5°C, the temperature of the cold water tank is set at -30°C, and the temperature of the hot water tank is set at 40°C; , the cold water pump and the magnetic pump are started in turn, and the automatic adjustment of the circuit starts; rely on the speed of the magnetic pump to adjust the pressure before the valve, rely on the speed of the hot water pump to adjust the temperature before the valve, and rely on the speed of the cold water pump to adjust the temperature after the valve; wait ...

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Abstract

A liquid ring electric expansion valve flow characteristic test bed control system is used for air conditioning refrigeration technical field, comprising test loop, cold source loop, hot source loop, its test loop consists of magnetic drive pump, mass flow meter, high pressure heat exchanger, electric expansion valve, low pressure heat exchanger, liquid storage and dry filter. Magnetic drive pump outlet is linked to mass flow meter inlet, mass flow meter outlet is linked to high pressure heat exchanger inlet high pressure heat exchanger outlet is linked to electric expansion valve inlet, electric expansion valve outlet is linked to copper pipe between low pressure heat exchanger then to liquid storage upper inlet, liquid storage under outlet is linked to dry filter inlet by copper pipe, liquid storage outlet is linked to magnetic drive pump inlet, cold source loop is linked to test loop through low pressure heat exchanger and hot source loop is linked to test loop through low pressure heat exchanger. The invention has solved cold producing medium lubricating oil problem, and can test flow characteristic of electric expansion valve several cold producing medium.

Description

technical field [0001] The invention relates to a test bench control system, in particular to a liquid ring method electronic expansion valve flow characteristic test bench control system, which is used in the technical field of air conditioning and refrigeration. Background technique [0002] At present, in the refrigeration system, the electronic expansion valve is favored by the refrigeration industry as a new generation of refrigeration throttling device. Among them, the stepping motor electric electronic expansion valve has the advantages of energy saving, high reliability and high controllability, and has been widely used. However, for the research on the flow characteristics of electronic expansion valves, manufacturers usually use a simple nitrogen flow test method according to the Machinery Industry Standard of the People's Republic of China JB / T10212-2000 (direct-acting electronic expansion valves for refrigeration and air conditioning). The valve outlet is open t...

Claims

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Application Information

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IPC IPC(8): G01F1/76G01M99/00
Inventor 张川马善伟陈江平陈芝久
Owner SHANGHAI JUNLE REFRIGERATION CONTROL
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