CN201780265U

CN201780265U - Small-size environmental test chamber for pollutant release research

Info

Publication number: CN201780265U
Application number: CN2010201949162U
Authority: CN
Inventors: 于韵
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2010-05-19
Filing date: 2010-05-19
Publication date: 2011-03-30
Anticipated expiration: 2020-05-19

Abstract

A small environmental test chamber for pollutant release research, including a chamber body, an air generation system, a temperature and humidity control system, a sampling system and an air purification device. The small-scale environmental test chamber is used to simulate close to the real space. The temperature, humidity and air exchange rate in the chamber can be controlled according to the experimental conditions, and the cost is low and the operation is simple. At the same time, the cabin is equipped with a purification device, which can purify the air samples at the inlet and outlet, improve the test conditions, help to obtain true and reliable test data, and avoid pollution to the indoor air.

Description

The minienvironment test chamber that is used for the pollutant releasing research

Technical field

The utility model relates to a kind of minienvironment test chamber that is used for the pollutant releasing research, particularly relates to the minienvironment test chamber of volatile matter releasing research in the decorating and renovating material, belongs to the proving installation technical field.

Background technology

At present IAQ (indoor air quality) is generally not good, and people healthy had very big threat.With regard to China is present, cause that the main reason of room air pollution is because bad finishing has promptly used some indoor decorating materials that contain a large amount of objectionable impuritiess such as formaldehyde, volatile organic compounds etc. in fitment process.Considering diversity, trace and the cumulative bad of indoor pollutant, is main means to the research in indoor pollution source with the modeling effort of environmental test chamber.

China's (application number) patent No. 200520047927 " a kind of weather humiture analogue means of indoor environment testing cabinet " discloses a kind of weather humiture analogue means of indoor environment testing cabinet, by blower fan, refrigeration coil, heating coil, humidifier is formed, it is characterized in that: described said modules is according to the air-flow working direction, press refrigeration coil, heating coil, putting in order of humidifier links together, form the climatic simulation device, both can realize the simulation of the humiture environment under the general normal climate condition, and can also realize the high temperature low humidity, this relatively usefulness of the simulation of special climate environment of low temperature and high relative humidity.

This environmental test chamber body exists size big and do not have particular provisions, do not need to set up, do not relate to according to building module deficiency such as air cleaning unit.At first body size in cabin is set up not according to building module, and simulates real real space gap strengthens, and size is big, mainly is used in the research of pollutant in the furniture; It two does not do purified treatment for air intake opening gas, may cause in the body of cabin background concentration excessive or the fluctuation situation is serious, the test figure confidence level descends, and gas outlet gas is not done purified treatment, then room air is polluted, and then air in the body of secondary pollution cabin.

Summary of the invention

The purpose of this utility model provides a kind of minienvironment test chamber that is used for the pollutant releasing research, this environmental test chamber can be simulated contaminated indoor environment well, can be implemented under the unified test condition, to the release experiment Analysis of volatile injurant matter in the decorating and renovating material, for the pollutant situation of effective evaluation decorating and renovating material provides condition.

The utility model is achieved through the following technical solutions:

This minienvironment test chamber comprises: cabin body, air generation systems, temperature and humidity control system, sampling system and air cleaning unit, the cementing agent that does not contain filling agent and release organic compound itself in the minienvironment test chamber structure, adopting the electropolishing stainless steel is inner surface material, inner wall smooth does not have suction-operated, no chemical reactivity.On the body door of cabin an opening part is arranged, the good no adsorbability of opening part equipment impermeability is sealed, so that pack testing sample and cleaning into.The cabin body possesses air intake and air out, the temperature and humidity detector.

Each components and parts of minienvironment test chamber are to connect like this: air pump links to each other with the drying tube that discolour silica gel is housed, drying tube links to each other with the purification pipe that activated charcoal is housed, the gas circuit of purification pipe is divided into two, one gas circuit links to each other with Drexel bottle in the constant temperature oven, the gas circuit of Drexel bottle is connected with spinner-type flowmeter, another gas circuit of purification pipe directly links to each other with constant temperature oven, the gas that comes out from spinner-type flowmeter mixes in constant temperature oven with the gas that comes out from purification pipe, the air intake opening of constant temperature oven bottom links to each other with the cabin body, one side of cabin body is equipped with low speed fan and digital display humiture instrument, opposite side has thief hatch, and the bottom of cabin body is furnished with a plurality of gas outlets, and the gas outlet is connected with purification pipe.

The beneficial effects of the utility model are:

Utilize the simulation of minienvironment test chamber near real space, temperature, humidity, air exchange rate can be controlled according to experiment condition in the body of cabin, and cost is low, and be simple to operate; The cabin body possesses purification plant simultaneously, can purify air intake opening and gas outlet air sample, and the lifting test condition helps to obtain true and reliable test figure, and avoids room air is polluted.

Description of drawings

Accompanying drawing is the minienvironment test chamber synoptic diagram that is used for the pollutant releasing research.

1 air pump, 2 drying tubes (discolour silica gel), 3 purification pipes (activated charcoal), 4 Drexel bottles, 5 constant temperature ovens, 6 spinner-type flowmeters, 7 air intake openings, 8 low speed fans, 9 warm and humid probe 10 cabin bodies 11 thief hatch 12 gas outlets, 13 purification pipes (activated charcoal) among the figure

Specific embodiment

(1) the experimental cabin body 10

Simulate true room as far as possible according to building module, cabin body (10) internal volume 1m * 1m * 0.6m; Cabin body material selection double mirror stainless steel material liner foamed material is made, and guarantees inner no adsorbability and self no gas pollutant release and certain thermal and insulating performance is arranged.Cabin body design has air intake opening (7) and gas outlet (12) and gaseous sample acquisition port (11), and body design in cabin has hatch door, and hatch door is convenient to be opened, and is convenient to place sample and enters in the cabin.Hatch door is opened out and is provided with rubber gasket, guarantees its sealing effectiveness.For guaranteeing that gas can mix and similar in the cabin to air-flow effect in the actual room, the method that adopts many air inlets gas outlet and low speed fan (8) technology to combine in the body of cabin, and utilize teflon that body corner, cabin is sealed and handle at the round edge angle.Compare this cabin body favorable sealing property of confirmation through test determination air intake opening airshed and gas outlet airshed.

(2) air generation systems

Utilizing small-sized oil-free air compressor is that air pump (1) will be tested room air and enter gas pipeline through overcompression, utilizes spinner-type flowmeter (6) control and regulates the air input, to keep constant air input and corresponding cabin body air exchange rate.Spinner-type flowmeter has gas admittance valve, can regulating and controlling and read the airshed size.The air process drying tube (2) (interior dress discolour silica gel) that airshed is constant carries out drying with gas; Then air communication is crossed purification pipe (3) (interior dress active carbon particle) and is further purified air, to reach requirement of experiment.Discolour silica gel and active carbon particle can be recycling by regular heat-activated.Airshed in the body of cabin can be carried out step-less adjustment between 0-20L/min by regulating control small air pump air output size and air intake opening spinner-type flowmeter, i.e. minienvironment test chamber respective air exchange rate: 0-2.0 time/hour.

(3) temperature humidity control system

Temperature control: utilize minienvironment test cabin temperature control system to carry out temperature control.The comprehensive actual architecture indoor ambient air temperature situation of change of the utility model, abandoned and directly utilized thermostat control cabinet body method of temperature, and take gas temperature and then the control cabinet body method of temperature of utilizing thermostat to enter the cabin body, thereby the gas temperature of specimen surface and the possibility that actual cabin body temperature degree is not inconsistent have been avoided flowing through by control.By regulating the constant temperature oven (5) that heated air is used, the gas temperature that enters the cabin body can be controlled at 15-30 ℃

Moisture control system: take all factors into consideration economy, controlled humidity effect and environmental protection, the utility model has adopted Drexel bottle (4) drainage purge gas to change gas humidity and then has changed the method for cabin body internal relative humidity.The gas that enters the cabin body at first passes through discolour silica gel, dramatically gas is carried out drying, the gas of drying is changed gas temperature by constant temperature oven (5) device back, according to testing requirements humidity the gas of appropriate amount is absorbed moisture by Drexel bottle (interior dress distilled water) again, change gas humidity, play humidification.With gas behind the humidification and mix with dry evenly after, the air-flow that obtains certain relative humidity directly enters the cabin body.The rh value of the method in not only can the control cabinet body, and can change the relative humidity that enter cabin body gas by the airshed ratio that changes dried moisture road and then change relative air humidity value in the body of cabin.Regulate by dried moisture road airshed ratio, the relative humidity that enters the gas of cabin body can be controlled at 20-90%.

Be furnished with digital display temperature indicating hygronom (9) in the body of cabin and can monitor the humiture situation in the body of cabin that reads at any time accurately, and this humiture instrument has the memory storage function, can write down the highest and minimum temperature humidity situation in the certain hour, be convenient to monitor the fluctuation of humiture in the body of cabin.

(4) sampling system

This minienvironment test chamber leaves special thief hatch (11), and thief hatch can dock constant current sampling thief (air sampler) sampling, utilizes spectrophotometer or gas chromatography that gas in the body of cabin is analyzed.The cabin body is furnished with 5 gas outlets (12) simultaneously, and the gas outlet air communication is crossed purification pipe (13) (interior dress acticarbon) back and discharged the cabin body, avoids producing secondary pollution, can utilize these 5 gas outlets to sample simultaneously in the time will carrying out parallel experiment.

(5) purification plant

This minienvironment test chamber adopts the charcoal absorption pipe that gas is carried out purified treatment, after minienvironment test chamber hole capital after selling all securities (not putting into material sample) is measured, air intake opening (air inflow is: adopt the air sample from thief hatch and carry out concentration of formaldehyde and measure after 10L/min) starting working 1 hour, and the formaldehyde background concentration is in the body of cabin: 0.029mg/m3-0.033mg/m by every interval certain hour ³, the TVOC background concentration is: 0.030-0.036mg/m ³

Claims

1. A small-scale environmental test chamber for pollutant release research, characterized in that:

(1) The small-scale environmental testing cabin includes a cabin body, an air generating system, a temperature and humidity control system, a sampling system and an air purification device;

(2) The components of the small environmental test chamber are connected in this way: the air pump is connected to the drying pipe equipped with color-changing silica gel, and the drying pipe is connected to the purification pipe equipped with activated carbon. The gas washing bottle in the constant temperature box is connected, the gas path of the gas washing bottle is connected with the rotameter, the other gas path of the purification pipe is directly connected with the constant temperature box, the gas from the rotameter and the gas from the purification pipe are in constant temperature Mix in the box, the air inlet at the bottom of the incubator is connected to the cabin, one side of the cabin is equipped with a low-speed fan and a digital display temperature and humidity meter, the other side has a sampling port, and the bottom of the cabin is equipped with multiple air outlets. The air outlet is connected with the purification pipe;

(3) There is an opening on the door of the test cabin, and the opening is equipped with a non-absorbent seal with good airtightness.

2. A small environmental test chamber for pollutant release research according to claim 1, characterized in that: the inner surface of the test chamber is made of electropolished stainless steel.

3. A small-scale environmental test chamber for pollutant release research according to claim 1, characterized in that: the test chamber body can be equipped with 5 air outlets. the