CN203328848U - Mouth and nose type layered multi-concentration contamination control device - Google Patents

Abstract

The utility model provides a mouth and nose type layered multi-concentration contamination control device which comprises a multi-layer contamination tower, wherein the multi-layer contamination tower is formed by piston gas main pipes, dilution cavities, diffusion cavities and waste gas cavities, and the piston gas main pipes, the dilution cavities, the diffusion cavities and the waste gas cavities are arranged in a sleeved mode from interior to exterior of the multi-layer contamination tower. Each layer of piston gas main pipe outputs piston gas from a piston gas overflowing hole, and the outputted piston gas is evenly mixed with diluted gas. A sampling pump and a sensor group on each layer detect a diluted concentration value and feed the diluted concentration value back to a computer, and control an air flow valve on each layer to input air for dilution in proportion according to set different concentrations, and after stabilization, a circle of suction pipes on each layer is used for carrying out a contamination suction experiment on experimental animals on expiratory air cavities and provides main piston gas for the next layer. The concentration of the piston gas on one layer is different from that of the piston gas on other layers so as to achieve the purpose of respectively carrying out different concentrations of contamination suction experiments on one contamination tower. The parameters such as the control process of the experiments and detection results of the experiments are stored in the computer or an experimental report is printed through a printer. The mouth and nose type layered multi-concentration contamination control device has the advantage of solving the problem that the different concentrations are automatically controlled and finished in one contamination device in a toxicology contamination suction experiment.

Description

Many concentration of mouth and nose formula layering inhalation control device

Technical field

This utility model relates to a kind of many concentration of mouth and nose formula layering inhalation control device.

Background technology

Along with the development of people to the respiratory system disease scientific research, increasing pathological study need to be breathed toxicity test and be verified that some gaseous material endangers effect for the mankind, test for many concentration, Technology Need in the past adopts respectively independently many entablatures nasal respiration toxicity test equipment once to complete experiment simultaneously or single device completes experiment several times, if it is large to adopt multiple devices to take lab space, cost is too high; If adopt the single device gradation to do but time-consuming is long, the different assurances of condition not science and the accuracy of experiment, bring implacable contradiction to the application of scientific research institution and scientific experiments, in order not take greater room, to reduce fund, the shortening experimental period of buying many experimental facilitiess, can carry out the experiment of variable concentrations mouth and nose formula Inhalation at a contamination equipment higher slice at any time, so develop a kind of many concentration of mouth and nose formula layering inhalation control device, become current urgent needs.

Summary of the invention

For solving the problem existed in above-mentioned technology, the purpose of this utility model is to provide a kind of control appliance that carries out the experiment of variable concentrations mouth and nose formula Inhalation at a contamination equipment higher slice.

For achieving the above object, the technical solution of the utility model is to provide a kind of many concentration of mouth and nose formula layering inhalation control device, include and be arranged on being responsible for by the poison of every one deck from inside to outside on rotating pulley, dilution chamber, diffusion chamber, the multilamellar contamination tower that the waste gas chamber is set in together, multilamellar contamination tower is manufactured by resistant material, its innermost layer is the poison supervisor of every one deck of hollow polyhedral or cylindrical shape, special-purpose computer controller monitoring contamination source of the gas is controlled a certain amount of poison by the poison flow valve and is entered into the poison supervisor of the superiors in multilamellar contamination tower by the seal rotary import, poison supervisor top connects poison flow valve and contamination source of the gas by the seal rotary import, minute a lot of layers on whole contamination device, every one deck has a poison supervisor top to be communicated with the diffusion chamber of last layer, middle part is equipped with dilution chamber, the make a circle diffusion chamber of this layer of sealed packet again in the periphery of each dilution chamber, middle part, diffusion chamber outer ring is equipped with a suction tube and is directly led to the animal nose frame be arranged on the sealing ring for fixing, send the contamination gas of the variable concentrations diluted to the laboratory animal nose front end in the animal nose frame, the contamination gas part of this layer can be enriched in lower one deck poison supervisor, the diffusion chamber of last one deck is connected to supervisor's outlet and emits by inline valve.The waste gas such as carbon dioxide that laboratory animal is breathed out are sent to the waste gas intracavity from the expired gas intracavity separately, can not be mixed in other diffusion chambers but discharged by exhaustor by negative pressure sucking pump and extraction flow valve, the sampling pump of every layer and sensor group are measured to concentration value after dilution and feed back to computer control instrument and control this layer of air flow valve according to the proportional input air of the variable concentrations set, also can be by the diluent gas of manual flow valve manual adjustment input, dilution reach stable after by suction tube on each exhalation air cavity to this layer of middle part one circle the laboratory animal in fixing animal nose frame carry out the Inhalation experiment, and by the control procedure of experiment and the Parameter storage such as testing result in computer control instrument (31) or print laboratory report by printer.

This utility model beneficial effect is to have realized that the fund that neither takies greater room, many experimental facilitiess of minimizing purchase can shorten experimental period again, can carry out the experiment of variable concentrations mouth and nose formula Inhalation at a contamination equipment higher slice fast at any time, solve in the experiment of toxicology Inhalation and automatically controlled the difficult problem that variable concentrations completes in a contamination equipment.

The accompanying drawing explanation

The schematic diagram that accompanying drawing is this utility model structure.

In figure:

1. poison flow valve 2. contamination source of the gas 3. air compressor 4. air are responsible for

5. diffusion chamber 6. dilutes trachea 7. air flow valve 8. manual flow valve

9. exhalation air cavity 10. waste gas chamber 11. tails block up gim peg 12. negative pressure sucking pumps

13. extraction flow valve 14. exhaustor 15. feces groove 16. animal nose frames

17. supervisor's outlet 18. inline valve 19. sampling muffler 20. sampling air inlet pipe

21. sampling pump 22. sensor group 23. laboratory animal 24. movable tails are stifled

25. sealing ring for fixing 26. suction tube 27. dilution chamber 28. poison overfolw holes

29. poison is responsible for 30. seal rotary import 31. computer control instrument 32. rotating pulleys

33. bracing frame 34. multilamellar contamination towers 35. revolve mixed fin.

The specific embodiment

Reaching by reference to the accompanying drawings embodiment is illustrated this utility model.

As shown in drawings, this utility model provides a kind of many concentration of mouth and nose formula layering inhalation control device, include be arranged on rotating pulley 32 from inside to outside by the poison of every one deck supervisor 29, dilution chamber 27, diffusion chamber 5, the multilamellar contamination tower 34 that waste gas chamber 10 is set in together, multilamellar contamination tower 34 is manufactured by resistant material, its innermost layer is the poison supervisor 29 of every one deck of hollow polyhedral or cylindrical shape, special-purpose computer controller 31 monitoring contamination sources of the gas 2 are controlled a certain amount of poison by poison flow valve 1 and are entered into the poison supervisor 29 of the superiors in multilamellar contamination tower 34 by seal rotary import 30, poison is responsible for 29 tops and is connected poison flow valve 1 and contamination source of the gas 2 by seal rotary import 30, minute a lot of layers on whole contamination device, every one deck has a poison to be responsible for the diffusion chamber 5 that 29 tops are communicated with last layer, middle part is equipped with dilution chamber 27, the make a circle diffusion chamber 5 of this layer of sealed packet again in the periphery of each dilution chamber 27, diffusion chamber 5 middle parts, outer ring are equipped with a suction tube 26 and are directly led to the animal nose frame 16 be arranged on sealing ring for fixing 25, send the contamination gas of the variable concentrations diluted to animal nose frame 16 interior laboratory animal 23 nose front ends, the waste gas such as carbon dioxide that laboratory animal 23 is breathed out are sent in waste gas chamber 10 in exhalation air cavity 9, by negative pressure sucking pump 12 and extraction flow valve 13, by exhaustor 14, discharged, can not repeat to suck and also can not cause the aspiration contamination of other laboratory animals, the contamination gas part of this layer in diffusion chamber 5 can flow in lower one deck poison supervisor 29, the diffusion chamber 5 of last one deck is connected to supervisor's outlet 17 and emits by inline valve 18.Every layer of poison supervisor 29 has poison overfolw hole 28 to export by same flow, the concentration value that the sampling pump 21 of every layer and sensor group 22 are measured to after dilution feeds back to computer control instrument 31 these layer of air flow valves 7 of control according to the proportional input air of the variable concentrations set, also can be by the diluent gas of manual flow valve 8 manual adjustment inputs, animal nose frame 16 interior laboratory animals 23 fixing on each exhalation air cavity 9 enclosed to this layer of middle part one by suction tube 26 after dilution reaches and stablizes are carried out the Inhalation experiment, and the Parameter storages such as the control procedure of experiment and testing result are printed to laboratory report in computer control instrument 31 or by printer, multilamellar contamination tower 34 is arranged on a bracing frame 33 with rotating pulley 32, a seal rotary import 30 is arranged at its top, can arbitrarily rotate and air tight, animal nose frame 16, sampling pump 21 and sensor group 22 independently are fixed on multilamellar contamination tower 34, can rotate freely along with the multilamellar tower 34 of contaminating, the dilution trachea 6, exhaustor 14 and the data conductor that are connected to multilamellar contamination tower 34 all adopt flexible material, can not affect at multilamellar contamination tower 34 and rotate freely, poison supervisor 29 is by the resistant material manufacture, surfaces externally and internally is smooth, be installed on hollow multi-faceted column or the hollow cylinder of multilamellar contamination tower 34 center innermost layers, at its topmost, a seal rotary import 30 is arranged, supervisor in its underpart exports 17 places inline valve 18 is installed, except the superiors, the poison of every one deck is responsible for the diffusion chamber 5 that 29 tops all are communicated to last layer, and this layer of sealed bottom makes poison have uniformly many small sircle holes as poison overfolw hole 28 from middle each layer near dilution chamber 27 inboards, the position of every one deck poison overfolw hole 28, size, shape is all the same, just make the contamination gas in poison supervisor 29 to arrive in the dilution chamber 27 of every one deck with the same speed of overflowing and spill-out mean allocation, dilution chamber 27 is independently airtight cavities of each layer of difference that the surfaces externally and internally made with resistant material is smooth, be sleeved on every one deck outside of poison supervisor 29, it surrounds this layer of poison overfolw hole 28 surrounding on poison supervisor 29 does not allow poison directly overflow, have the dilution QI KOU of evenly arranging on dilution chamber 27 tops, outer ring and connecting dilution trachea 6, computer control instrument 31 enters into the different air mass flows of dilution trachea 6 according to the air flow valve 7 of every one deck of programme-control prepared in advance from air compressor 3 and air supervisor 4, also can be by the diluent gas of manual flow valve 8 manual adjustment inputs, the air of having controlled flow enter into 27 pairs of poisones that overflowed by poison overfolw hole 28 of dilution chamber according to the different proportion dilution after, by dilution chamber 27, following opening enters into peripheral diffusion chamber 5, every one deck all is provided with manual flow valve 8 can suitably adjust the supplementary air of air inflow, diffusion chamber 5 is independently airtight cavities of each layer of difference that the surfaces externally and internally made by resistant material is smooth, be sleeved on poison supervisor 29 and dilution chamber 27 peripheries, when the poison of dilution chamber 27 interior mixing and diluent air enter into the space of diffusion chamber 5, under the spiral helicine guiding of revolving mixed fin 35 of arranging on diffusion chamber 5 internal edges in the shape of a spiral air-flow can in time the poison of contamination and diluent air fully be mixed, the pore that diffusion chamber 5 middle parts, outer ring have connects suction tube 26, directly lead to the interior laboratory animal 23 nose front ends of animal nose frame 16 that are arranged on the sealing ring for fixing and carry out gas exposure to it, the contamination gas that a part mixes simultaneously flow into lower one deck poison supervisor 29, waste gas chamber 10 is smooth airtight cavities of surfaces externally and internally of being made by anti-corrosion rotten material, be sleeved on peripheral each exhalation air cavity 9 and the exhaustor 14 of being communicated with of diffusion chamber 5, each suction tube 26 directly is communicated with the nose that enters exhalation air cavity 9 aligning laboratory animals 23 by waste gas chamber 10, exhalation air cavity 9 be many be vertically mounted on 10 peripheries, waste gas chamber with sealing ring for fixing 25 the fixedly bobbin of the conical horn degree of lip-rounding, on it outward flange have sealing ring for fixing 25 can fixing seal with the animal nose frame 16 of laboratory animal 23, the inward flange sealing is fixed in 10 perforates of waste gas chamber, the carbon dioxide that laboratory animal 23 is breathed out and waste gas flow into by the hole of suction tube 26 peripheries the exhaustor 14 that waste gas chamber 10 is aggregated into bottom, under extraction flow valve 13 and negative pressure sucking pump 12 controls, according to certain volume exhaust, go out.Sampling pump 21 and sensor group 22 are the interior testing elements that have airtight loop of one's own of diffusion chamber 5 that are arranged on respectively each variable concentrations layer, each concentration layer is a set of, every suit testing element includes a sampling air inlet pipe 20 and is connected to sensor group 22 inlet ends, sensor group 22 outlet sides are connected to sampling pump 21 inlet ends under computer control instrument 31 is controlled, the outlet side of sampling pump 21 is connected to the interior discharge sample gas in waste gas chamber 10 by a sampling muffler 19, the sensor group 22 of every layer gathers the good poison gas concentration of dilution of this layer, feed back to computer control instrument after the mensuration concentration value and control this layer of air flow valve 7, according to the proportional input air of the variable concentrations set, after reaching and stablize, dilution carries out the Inhalation experiment by suction tube 26 to the laboratory animals 23 in animal nose frame 16 fixing on a plurality of exhalation air cavitys 9 of this layer circle.Animal nose frame 16 is made by resistant material, surfaces externally and internally is smooth, its front opening can expose the nose front end of laboratory animal 23, bottom has dismountable feces groove 15 to be convenient to the foreign body that cleaning experiment animal 23 is discharged, rear end has the stifled gim peg 11 of the stifled 24 use tails of movable tail to fix, and can regulate according to the size of laboratory animal 23 position of movable tail stifled 24.Computer control instrument 31 is one and inputs and stored the conditional parameter of requirement of experiment with the main frame intellectuality, by being connected to the concentration numerical value automatic feedback that each layer of sampling pump 21 and sensor group 22 test experience are concrete and automatically controlling this layer of air flow valve 7 and diluted according to the proportional input air of the variable concentrations set, reach stable after by suction tube 26 on the exhalation air cavity 9 all to this layer of middle part the laboratory animals 23 in fixing animal nose frame 16 carry out the Inhalation experiment, the waste gas of breathing out is through controlling extraction flow valve 13 and negative pressure sucking pump 12 by default flow discharge, the parameters such as the control procedure of whole experiment and testing result can be stored in computer control instrument 31 or print laboratory report by printer.

embodiment:

During use, at first to connect equipment, contamination source of the gas 2, the power supply of air compressor 3 and computer control instrument 31, set needed each layer of variable concentrations numerical value in computer control instrument 31, be ready to laboratory animal 23, put it in animal nose frame 16, regulate the position of movable tail stifled 24, with the stifled gim peg 11 of tail, fix, all animal nose frames 16 that installed laboratory animal 23 of needs experiment are installed on the peripheral exhalation air cavity 9 with sealing ring for fixing 25, after control on computer control instrument 31 is stable, experiment starts, contamination gas by poison flow valve 1 adjust flux enters into the top poison supervisor 29 in multilamellar contamination tower 34 through seal rotary import 30, then overflow contamination gas from top poison overfolw hole 28 in top dilution chamber 27 according to the flow set, top air flow valve 7 is got well and sends in top diffusion chamber 5 to the quantitative diluent air of the interior conveying of top dilution chamber 27 gas dilution of contaminating by dilution trachea 6 under the control of computer control instrument 31, also can be by the diluent gas of manual flow valve 8 manual adjustment inputs, diffusion chamber 5 inside have revolves mixed fin and can make the gas rotating mix homogeneously that flows, the dilution contamination gas that a part mixes enters into top each suction tube 26, carry out the Inhalation experiment of top maximum concentration to the laboratory animal 23 in animal nose frame fixing on top each exhalation air cavity 9 16, the poison that top diffusion chamber 5 is being communicated with the second layer is responsible for 29 tops, provide the contamination of having diluted gas to the second layer, then overflow contamination gas from the poison overfolw hole 28 of the second layer in the dilution chamber 27 of the second layer according to the flow set, the air flow valve 7 of the second layer under the control of computer control instrument 31 by dilution trachea 6 to the interior conveying of second layer dilution chamber 27 the quantitative diluent air gas dilution of contaminating get well and send into each suction tube 26 of the second layer, carry out the Inhalation experiment of the second level high concentration to the laboratory animal 23 in animal nose frame fixing on each exhalation air cavity 9 of the second layer 16, the diffusion chamber 5 of the second layer is being communicated with the poison of the 3rd layer and is being responsible for 29 tops, give the 3rd layer the contamination of having diluted gas is provided, sampling pump 21 and sensor group 22 are measured to concentration value after dilution and feed back to computer control instrument 31 to control the 3rd layer of air flow valves 7 proportional by air compressor 3 input airs according to the variable concentrations set, also can be by the diluent gas of manual flow valve 8 manual adjustment inputs, dilution enters diffusion chamber 5 after reaching and stablizing, due to the dilution ratio difference, the concentration of contamination is also different, and then carry out the Inhalation experiment of the 3rd layer of the 3rd concentration to the laboratory animal 23 in animal nose frame fixing on the 3rd layer of each exhalation air cavity 9 16 by the suction tube 26 of the 3rd layer, the rest may be inferred can complete the exposure experiment of multilamellar variable concentrations, the waste gas such as carbon dioxide that all laboratory animals 23 are breathed out are sent in waste gas chamber 10 in exhalation air cavity 9, by negative pressure sucking pump 12 and extraction flow valve 13, by exhaustor 14, discharged, computer control instrument 31 can automatically complete the Parameter storages such as the control procedure of whole experiment and testing result and print laboratory report in computer control instrument 31 or by printer according to the experimental arrangement of realizing input.After all experiments were satisfactorily completes, computer control instrument 31 drives and closes poison flow valve 1, then after time-delay closing air flow valve 7 is all replaced totally by the poison in whole contamination device, then closing device, the contamination source of the gas 2, air compressor 3 and computer power supply, take out laboratory animal 23, take out successively each laboratory animal 23 and carry out subsequent analysis research and next step scientific analysis.

Claims (9)

1. many concentration of mouth and nose formula layering inhalation control device, it is characterized in that: include be arranged on rotating pulley (32) from inside to outside by the poison of every one deck supervisor (29), dilution chamber (27), diffusion chamber (5), the multilamellar contamination tower (34) that waste gas chamber (10) is set in together, multilamellar contamination tower (34) is manufactured by resistant material, its innermost layer is the poison supervisor (29) of every one deck of hollow polyhedral or cylindrical shape, special-purpose computer controller (31) monitoring contamination source of the gas (2) is controlled a certain amount of poison by poison flow valve (1) and is entered into the poison supervisor (29) of the superiors in multilamellar contamination tower (34) by seal rotary import (30), poison supervisor (29) top connects poison flow valve (1) and contamination source of the gas (2) by seal rotary import (30), minute a lot of layers on whole contamination device, every one deck has poison supervisor (a 29) top to be communicated with the diffusion chamber (5) of last layer, middle part is equipped with dilution chamber (27), the make a circle diffusion chamber (5) of this layer of sealed packet again in the periphery of each dilution chamber (27), middle part, diffusion chamber (5) outer ring is equipped with a suction tube (26) and is directly led to the animal nose frame (16) be arranged on sealing ring for fixing (25), to animal nose frame (16), interior laboratory animal (23) nose front end is sent the contamination gas of the variable concentrations diluted, the contamination gas part of this layer can be enriched in lower one deck poison supervisor (29), the diffusion chamber (5) of last one deck is connected to supervisor's outlet (17) and emits by inline valve (18), the waste gas such as carbon dioxide that laboratory animal (23) is breathed out are sent in waste gas chamber (10) separately in exhalation air cavity (9), can not be mixed in other diffusion chambers (5) but by negative pressure sucking pump (12) and extraction flow valve (13) by exhaustor (14) discharge, the sampling pump of every layer (21) and sensor group (22) are measured to concentration value after dilution and feed back to computer control instrument (31) and control this layer of air flow valve (7) according to the proportional input air of the variable concentrations set, also can pass through the diluent gas of manual flow valve (8) manual adjustment input, dilution reaches after stable carries out the Inhalation experiment by suction tube (26) to the laboratory animal (23) in the upper fixing animal nose frame (16) of each exhalation air cavity (9) of this layer of middle part one circle, and by the control procedure of experiment and the Parameter storage such as testing result in computer control instrument (31) or print laboratory report by printer.

2. a kind of many concentration of mouth and nose formula layering inhalation control device according to claim 1, it is characterized in that: described multilamellar contamination tower (34), be arranged on a bracing frame (33) with rotating pulley (32), a seal rotary import (30) is arranged at its top, can arbitrarily rotate and air tight, animal nose frame (16), sampling pump (21) and sensor group (22) independently are fixed on multilamellar contamination tower (34), can rotate freely along with the multilamellar tower (34) of contaminating, be connected to the dilution trachea (6) of multilamellar contamination tower (34), exhaustor (14) and data conductor all adopt flexible material, can not affect at multilamellar contamination tower (34) and rotate freely.

3. a kind of many concentration of mouth and nose formula layering inhalation control device according to claim 1, it is characterized in that: described poison supervisor (29) is by the resistant material manufacture, surfaces externally and internally is smooth, be installed on hollow multi-faceted column or the hollow cylinder of multilamellar contamination tower (34) center innermost layer, at its topmost, a seal rotary import (30) is arranged, supervisor's outlet (17) in its underpart locates to be equipped with inline valve (18), except the superiors, the poison of every one deck supervisor (29) top all is communicated to the diffusion chamber (5) of last layer, and this layer of sealed bottom makes poison have uniformly many small sircle holes as poison overfolw hole (28) from middle each layer near dilution chamber (27) inboard, the position of every one deck poison overfolw hole (28), size, shape is all the same, just make the contamination gas in poison supervisor (29) to arrive in the dilution chamber (27) of every one deck with the same speed of overflowing and spill-out mean allocation.

4. a kind of many concentration of mouth and nose formula layering inhalation control device according to claim 1, it is characterized in that: described dilution chamber (27) is independently airtight cavity of each layer of difference that the surfaces externally and internally made with resistant material is smooth, suit is enclosed in every one deck outside of poison supervisor (29), have the dilution QI KOU of evenly arranging on dilution chamber (27) top, outer ring and connecting dilution trachea (6), computer control instrument (31) enters into the different air mass flows of dilution trachea (6) according to the air flow valve (7) of every one deck of programme-control prepared in advance from air compressor (3) and air supervisor (4), the air that also can control flow by the diluent gas of manual flow valve 8 manual adjustment inputs enter into dilution chamber (27) to the poison that overflowed by poison overfolw hole (28) according to the different proportion dilution after, enter into peripheral diffusion chamber (5) by the following opening of dilution chamber (27), manual flow valve (8) can suitably be adjusted air inflow and supplement air.

5. a kind of many concentration of mouth and nose formula layering inhalation control device according to claim 1, it is characterized in that: described diffusion chamber (5) is independently airtight cavity of each layer of difference that the surfaces externally and internally made by resistant material is smooth, be sleeved on poison supervisor (29) and dilution chamber (27) periphery, be placed with the spiral helicine mixed fin (35) that revolves on diffusion chamber (5) internal edge, when in dilution chamber (27), poison and diluent air mix the space that enters into diffusion chamber (5), under the spiral helicine guiding of revolving mixed fin (35) of arranging on diffusion chamber (5) edge in the shape of a spiral air-flow can in time the poison of contamination and diluent air fully be mixed, the pore that middle part, diffusion chamber (5) outer ring has connects suction tube (26), directly lead to the interior laboratory animal of animal nose frame (16) (23) the nose front end be arranged on the sealing ring for fixing and carry out gas exposure to it, the contamination gas that a part mixes simultaneously flow into lower one deck poison supervisor (29).

6. a kind of many concentration of mouth and nose formula layering inhalation control device according to claim 1, it is characterized in that: described waste gas chamber (10) is the smooth airtight cavity of surfaces externally and internally of being made by anti-corrosion rotten material, be sleeved on peripheral each exhalation air cavity (9) and the exhaustor (14) of being communicated with of diffusion chamber (5), each suction tube (26) directly is communicated with and enters the nose that exhalation air cavity (9) is aimed at laboratory animal (23) by waste gas chamber (10), exhalation air cavity (9) be many be vertically mounted on waste gas chamber (10) peripheral with sealing ring for fixing (25) the fixedly bobbin of the conical horn degree of lip-rounding, on it outward flange have sealing ring for fixing (25) can fixing seal with the animal nose frame (16) of laboratory animal (23), the inward flange sealing is fixed in the perforate of waste gas chamber (10), the carbon dioxide that laboratory animal (23) is breathed out and waste gas flow into by the hole of suction tube (26) periphery the exhaustor (14) that waste gas chamber (10) is aggregated into bottom, under extraction flow valve (13) and negative pressure sucking pump (12) control, according to certain volume exhaust, go out.

7. a kind of many concentration of mouth and nose formula layering inhalation control device according to claim 1, it is characterized in that: described sampling pump (21) and sensor group (22) are the testing elements that has airtight loop of one's own in the diffusion chamber (5) that is arranged on respectively each variable concentrations layer, each concentration layer is a set of, every suit testing element includes a sampling air inlet pipe (20) and is connected to sensor group (22) inlet end, sensor group (22) outlet side is connected to sampling pump (21) inlet end under computer control instrument (31) is controlled, the outlet side of sampling pump (21) is connected in waste gas chamber (10) and discharges sample gas by a sampling muffler (19), the sensor group (22) of every layer gathers the good poison gas concentration of dilution of this layer, feed back to computer control instrument after the mensuration concentration value and control this layer of air flow valve (7), according to the proportional input air of the variable concentrations set, dilution reaches after stable carries out the Inhalation experiment by suction tube (26) to the upper fixing interior laboratory animal (23) of animal nose frame (16) of these layer a plurality of exhalation air cavitys of circle (9).

8. a kind of many concentration of mouth and nose formula layering inhalation control device according to claim 1, it is characterized in that: described animal nose frame (16) is made by resistant material, surfaces externally and internally is smooth, its front opening can expose the nose front end of laboratory animal (23), bottom has dismountable feces groove (15) to be convenient to the foreign body that cleaning experiment animal (23) is discharged, rear end has movable tail stifled (24) to fix with the stifled gim peg (11) of tail, can regulate according to the size of laboratory animal (23) position of movable tail stifled (24).

9. a kind of many concentration of mouth and nose formula layering inhalation control device according to claim 1, it is characterized in that: described computer control instrument (31) is to input and stored the conditional parameter of requirement of experiment with the main frame intellectuality, by being connected to the concentration numerical value automatic feedback that each layer of sampling pump (21) and sensor group (22) test experience are concrete and automatically controlling this layer of air flow valve (7) and diluted according to the proportional input air of the variable concentrations set, reach after stablizing and carry out the Inhalation experiment by suction tube (26) to this layer of all upper fixing interior laboratory animal (23) of animal nose frame (16) of exhalation air cavity (9) in middle part, the waste gas of breathing out is discharged by default flow through controlling extraction flow valve (13) and negative pressure sucking pump (12), the parameters such as the control procedure of whole experiment and testing result can be stored in computer control instrument (31) or print laboratory report by printer.

Images