Toxic gas experimental device for mice

Abstract

The invention provides a toxic gas experimental device for mice, and relates to the field of medical experimental instruments.The toxic gas experimental device comprises an experimental box used for containing the mice, the experimental box comprises an experimental box body, a first control box with a first control cavity and a second control box with a second control cavity, and the experimental box body comprises an experimental cabin and a recycling cabin which are arranged up and down; the circumferential side wall of the experiment module is connected with an annular shell which is coaxially arranged, an annular channel communicated with a poison gas supply source is formed between the annular shell and the side wall of the experiment module, and the annular shell is arranged on the outer ring of the experiment module, so that poison gas is fed from the top originally and diffused from the periphery to the middle; the annular shell is matched with the gas conveying end, poison gas at the input end can be diffused in advance and fully shunted, all annular spaces are covered, the poison gas can be evenly released into the cabin body and evenly distributed in the cabin body, a disturbance structure does not need to be arranged in the cabin body, it is effectively guaranteed that the detected concentration is close to the actual concentration in the cabin body, and the error requirement is met.

Description

technical field [0001] The disclosure relates to the field of medical experimental instruments, in particular to a poisonous gas experimental device for mice. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] When carrying out some experiments related to the influence of poisonous gas (nitrogen dioxide, sulfur dioxide, etc.) on the vital signs of mice, a poisonous gas test box is often used. In the air of poisonous gas, after the experiment was set for a set time, the mice were taken out and the vital signs of the mice were detected and recorded to obtain the influence of poisonous gas on the vital signs of the mice under different parameters. [0004] When the existing poison gas box injects poison gas into the experimental cabin, because the gas supply end and the exhaust end are connected, the poison gas supply end is injected from the...

AI Technical Summary

Problems solved by technology

[0004] When the existing poison gas box injects poison gas into the experimental cabin, because the gas supply end and the exhaust end are connected, the poison gas supply end is injected from the top, and there is less barrier between the exhaust port and the gas supply, resulting in the main flow path of the poison gas at On the connection between the gas supply end and the exhaust port, convection is formed, which makes it difficult to fully disperse the poisonous gas in the experimental area. The distribution of the poisonous gas is uneven, and there are high concentration areas and low concentration areas. The mice tend to the lower concentration positions, measured There is an error between the concentration of the mouse and the concentration at the actual location of the mouse

[0005] The inventor found that the main way to solve the problem of uneven concentration distribution in the poison gas experiment box is to add fans in the cabin and expand the cross-sectional area of ​​the poison gas nozzle. One is to increase the disturbance structure, such as a fan, and the other is to expand the area of ​​the nozzle. , so that the output position of the poison gas nozzle is larger, thereby covering a larger area; but the disturbance structure occupies the space of the cabin inside the gas box, and the disturbance effect of the disturbance structure makes its surroundings a high-concentration and low-concentration intersection area , although most of the space in the cabin is made into an area with uniform concentration, the mouse activity will still tend to the low concentration area, and it is still impossible to ensure that the detected concentration is close to the actual inhaled concentration of the mouse; The upper limit of the nozzle is fixed, therefore, it is impossible to achieve complete coverage for the larger poisonous gas experiment cabin

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