A poisoning test device for regulating the concentration of volatile organic compounds in gaseous pollution

Abstract

The invention relates to a poisoning test device for regulating and controlling the gaseous pollution concentration of volatile organic compounds. A connected exhaust purification control unit, the conveying and mixing control unit includes an air supply pipe connected to the poisoning box, a pollutant conveying pipe connected with the air supply pipe, and arranged on the pollutant conveying pipe in sequence along the pollutant conveying direction The pollutant conveying fan, heater and micro-injection pump, the exhaust purification control unit includes an exhaust pipe connected with the poisoning box, a nozzle flowmeter arranged on the exhaust pipe in sequence along the direction of pollutant discharge, Frequency conversion exhaust fan and exhaust gas purifier. Compared with the prior art, the present invention has simple and compact structure, convenient operation, safety and reliability, can realize automatic control, effectively improves the accuracy and stability of pollutant concentration control in the poisoning box, has low production cost and good practicability .

Description

technical field [0001] The invention belongs to the technical field of medical toxicology tests, and relates to a poisoning test device, in particular to a poisoning test device for regulating the gaseous pollution concentration of volatile organic compounds. Background technique [0002] At present, in the field of medical toxicology tests, in order to study whether the chemical substances used in production, drugs, pesticides, food additives, and chemicals that can improve the quality of life are harmful to the human body or the environment, toxicological safety test evaluations must be carried out. Most of the chemicals must be studied in acute, subacute or chronic animal inhalation toxicity tests. An important means of these studies is to use the poisoning device to carry out poisoning experiments on animals or other objects. In the process of poisoning test, an important step is to accurately transport the gases in various concentrations of gas sources to a closed cham...

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Problems solved by technology

[0003] However, the existing inhalation poisoning device commonly used in the poisoning test is generally composed of a jet liquid atomization device and a poisoning room, mainly including a poisoning room, an atomizing nozzle, an air guide tube, an air compressor, Liquid medicine container, catheter, liquid medicine regulating valve and other components, but during the use of this device, the sprayed droplets are not uniform in size, and the larger droplets will directly drip, causing pollution and waste, and often Inadequate small enough droplets, especially when the device is used in animal inhalation experiments, larger droplets will fall directly on the animal, enter the animal through the skin, and not from the animal's respiratory system Therefore, the effect of inhalation poisoning that does not reach the expected target will directly affect the accuracy of the test results

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