CN207730718U - A kind of novel methylene generator - Google Patents
A kind of novel methylene generator Download PDFInfo
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- CN207730718U CN207730718U CN201721580535.6U CN201721580535U CN207730718U CN 207730718 U CN207730718 U CN 207730718U CN 201721580535 U CN201721580535 U CN 201721580535U CN 207730718 U CN207730718 U CN 207730718U
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Abstract
The utility model discloses a kind of novel methylene generators, include the shell of hollow sealing, and the left side of the shell is provided with air inlet pipe, and the air inlet pipe is connected after the left side wall of the shell with the entrance of oil strainer；The outlet of the oil strainer is connected with the entrance of a water filter, and the outlet of the water filter is connected with the air intake of the first suspended body flowmeter；First suspended body flowmeter is connected with the air intlet of the air intake of the second suspended body flowmeter and hollow hotair chamber respectively；It is connected at the top of the air outlet slit of second suspended body flowmeter and hollow air mixing chamber；The air outlet slit of the hotair chamber is connected with the formaldehyde gas recurring structure that one can generate adjustable concentration formaldehyde gas；The formaldehyde gas recurring structure is connected with the air mixing chamber.The utility model can produce the formaldehyde gas of preset concentration range, and the equipment for needing to be evaluated formaldehyde examination performance can be supplied to use.
Description
Technical field
The utility model is related to formaldehyde technical fields, more particularly to a kind of novel methylene generator.
Background technology
Currently, room air pollution has become the major reason for endangering human health, in modern society, people is more than 86%
Time is all spent in environment indoors.The quality of indoor air quality and the health of people are closely bound up.
Indoors in air pollution, formaldehyde is generally acknowledged in the world potential carcinogenic substance.Long Term Contact formaldehyde gas will lure
Send out cancer.Composite floor board, medium-density plate, the metope used when currently, the formaldehyde in room air is essentially from house decoration applies
The ornament materials such as material, chemical fibre carpet, and with Lauxite adhesive as main component and finishing material.
A kind of method that air quality is current prevalence, air quality sensor master are detected using air quality sensor
It is used for the monitoring to indoor environmental pollution object and the control of pollutant, it can be to indoor air quality and cleaning equipment (such as air
Clarifier) work monitored in real time and fed back, by acquiring indoor air quality and micronic dust index in real time, adjustment purification is set
Standby working condition achievees the purpose that cleaning equipment energy-saving run while ensureing indoor air quality.Common air matter
Quantity sensor is such as：PM2.5 sensors, CO2Sensor, the gaseous pollutants sensor such as formaldehyde, Temperature Humidity Sensor etc. are applicable in
In numerous occasions such as indoor air chemical pollution, Fresh air handling units, clean unit.The distribution of air pollutant concentration, with monitoring point and prison
There is an apparent dependence in the control time, thus sensitivity to air quality sensor and stability propose very high requirement.
Currently, the air quality sensor that PARA FORMALDEHYDE PRILLS(91,95) is detected is during the work time, usually there is detection stability not
The problems such as good, startup time length, different operating environment accuracy differ greatly, different pollutant concentration data deviations are big, these are asked
The working condition that topic influences whether to be equipped with the air filter unit of air quality sensor is adjusted, if indoor and outdoor cannot be directed to
Pollutant concentration variation in time adjustment, it will seriously affect the health of people.
Currently, national standard GB18883-2002《Indoor Air Quality standards》Concentration guidelines for Indoor Air Formaldehyde are not
More than 0.1mg/m3.Therefore, it is necessary to evaluate the air quality sensor for detecting formaldehyde working performance (such as sensitivity and
Accuracy etc.), such as, it is desirable that the air quality sensor for detecting formaldehyde can be to 0.005~5mg/m3Concentration variation
The formaldehyde of range is detected.Therefore, performance detection is carried out to air quality sensor for cooperation, it is desirable to provide mating formaldehyde
Generator (is used as formaldehyde occurring source), it is desirable that and formaldehyde generator can generate the formaldehyde of certain concentration range as requested, with
It is used when evaluating the detection performance of air quality sensor PARA FORMALDEHYDE PRILLS(91,95).
In addition, in terms of controlling indoor formaldehyde, air purifier is a kind of device of relatively common removal indoor formaldehyde.
For air purifier except formaldehyde performance evaluating aspect, according to national standard GB18801-2015《Air purifier》Requirement, need
Formaldehyde to occur in the environmental chamber of 30 cubic meters, then detects its detergent power, having also needed being capable of low strength range formaldehyde
Formaldehyde generator.Simultaneously in terms of evaluating the air purifier service life, need according to national standard GB18801-2015《Air purification
Device》In the dirt content of formaldehyde is tested, the standard for initial concentration of formaldehyde require control in 1mg/m3, recur
20 milli Grams Per Hours are not to be exceeded in amount, it is therefore desirable to which the formaldehyde of the formaldehyde generator of low concentration prepares speed (i.e. occurrence quantity) and do not surpass
Cross 0.34 milli Grams Per Minute.
But there is presently no a kind of devices, are used as formaldehyde occurring source, can produce the formaldehyde gas of preset concentration range
Body, can be supplied to air quality sensor, air purifier etc. need the equipment for being evaluated formaldehyde examination performance and other
The occasion needed uses.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of novel methylene generator, it is used as formaldehyde occurring source, it can
To produce the formaldehyde gas of preset concentration range, the needs such as air quality sensor, air purifier can be supplied to be evaluated
The equipment of formaldehyde examination performance and other desired occasion use, and are conducive to widely promote and apply, and have great production
Practice significance.
For this purpose, the utility model provides a kind of novel methylene generator, include the shell of hollow sealing, the shell
There are one air inlet pipe, the air inlet pipe to be connected with the entrance of an oil strainer after the left side wall of the shell for left side setting
It is logical；
The outlet of the oil strainer is connected with the entrance of a water filter, the outlet of the water filter and first
The air intake of suspended body flowmeter is connected；
First suspended body flowmeter is heated with the hollow air of the air intake of the second suspended body flowmeter and one respectively
The air intlet of room is connected；
It is connected at the top of the air outlet slit of second suspended body flowmeter and a hollow air mixing chamber；
The air outlet slit of the hotair chamber and a formaldehyde gas that can generate adjustable concentration formaldehyde gas occur
The air intake of structure is connected；
The air outlet slit of the formaldehyde gas recurring structure is connected with the air mixing chamber.
Wherein, the formaldehyde gas recurring structure includes the 4th suspended body flowmeter, second liquid container, third float-type
With the first liquid container；
Wherein, the sky that the air outlet slit of the hotair chamber passes through a main connecting tube and the 4th suspended body flowmeter
Gas entrance is connected, and the air outlet slit of the 4th suspended body flowmeter is connected with the top of second liquid container, and described second
Preset second formalin is stored in liquid container；
The top of the second liquid container is also connected with the right end of the air mixing chamber；
The left end of the main connecting tube is also connected with the air intake of the third float-type；
The air outlet slit of the third float-type is connected by a liquor charging pipeline, and the liquor charging pipeline is through described
The container cover having at the top of first liquid container is stored with preset first formalin in first liquid container, described
The lower part of liquor charging pipeline is extend into below the preset first formalin liquid level；
Also it is connected with the top of first liquid container at the top of the air mixing chamber.
Wherein, preset first formalin is identical with preset second formalin, includes formaldehyde solute, first
Alcohol solute and aqueous solvent, wherein the mass fraction ratio between the formaldehyde solute, methanol solute and aqueous solvent is：(37%~
40%)：(8%~14%)：(46%~55%).
Wherein, the air inlet pipe is connected with the air outlet slit of extraneous air compressor.
Wherein, there are one first switch ball valves, the first switch ball valve to be located at the shell for setting in the air inlet pipe
Outside；
Is provided in connecting line between the air outlet slit and the air mixing chamber of second suspended body flowmeter
Two switching balls.
Wherein, the outer wall of the hotair chamber is provided with electric heating wire, the electric heating wire successively with a solid-state after
Electric appliance, a heater switch are mutually conductively connected with a temperature controller；
The solid-state relay is connected with an external dc power.
Wherein, the air communication pipe of bending distribution, the left and right of the air communication pipe are provided in the hotair chamber
Both ends are connected with the air intlet of hotair chamber and air outlet slit respectively.
Wherein, the outside of the electric heating wire also covers and is provided with insulating layer；
The air communication pipe is the copper pipe of U-shaped；
The bottom surface of the shell is equipped with multiple universal wheels.
Wherein, there are one thermocouple, the thermocouple and the temperature controllers for the inside right end setting of the hotair chamber
It is connected by signal wire, the thermocouple is used to detect the air temperature value inside the hotair chamber, is then sent to
The temperature controller.
Wherein, the temperature controller is connected with the thermocouple and an operation control unit respectively, described for receiving
Thermocouple output hotair chamber inside air temperature value, then by inside the hotair chamber air temperature value with
Preset temperature value is compared, and temperature comparison result is sent to operation control unit；
The operation control unit, is connected with solid-state relay, and the temperature for being sent according to the temperature controller compares
As a result, sending corresponding control signal to the solid-state relay, the unlatching or disconnection of the solid-state relay are controlled.
By the above technical solution provided by the utility model as it can be seen that compared with prior art, the utility model provides
A kind of novel methylene generator is used as formaldehyde occurring source, can produce the formaldehyde gas of preset concentration range, can be supplied to
Air quality sensor, air purifier etc. need the equipment for being evaluated formaldehyde examination performance and other desired occasion to make
With being conducive to widely promote and apply, be of great practical significance.
In addition, for a kind of novel methylene generator provided by the utility model, the formaldehyde preparation speed having (is sent out
Raw amount) controllably, user can be met well and need to be evaluated formaldehyde examination to air quality sensor, air purifier etc.
It is used when the equipment of performance is evaluated.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of novel methylene generator provided by the utility model；
In figure, 1 is shell, and 2 be air inlet pipe, and 3 be first switch ball valve, and 4 be oil strainer, and 5 be water filter, and 6 be the
One suspended body flowmeter, 7 be the second suspended body flowmeter, and 8 be hotair chamber, and 10 be thermocouple；
11 be temperature controller, and 12 be heater switch, and 13 be solid-state relay, and 14 be main connecting tube, and 15 be third float-type
Meter, 16 be the first liquid container, and 17 be check valve, and 18 be the 4th suspended body flowmeter four, and 19 be second liquid container, and 20 be second
Switching ball, 21 be air mixing chamber, and 22 be escape pipe, and 100 be universal wheel, and 150 be liquor charging pipeline.
Specific implementation mode
In order to make those skilled in the art more fully understand the utility model, below in conjunction with the accompanying drawings and embodiment
The utility model is described in further detail.
Referring to Fig. 1, the utility model provides a kind of novel methylene generator, includes the shell 1 of hollow sealing, the shell
The left side setting of body 1 there are one air inlet pipe 2, the air inlet pipe 2 after the left side wall of the shell 1 with an oil strainer 4
Entrance be connected (by hollow pipeline)；
The outlet of the oil strainer 4 is connected with the entrance of a water filter 5, the outlet of the water filter 5 with
The air intake of first suspended body flowmeter 6 is connected；
First suspended body flowmeter 6 adds with the air intake of the second suspended body flowmeter 7 and a hollow air respectively
The air intlet in hot cell 8 is connected and (is realized especially by two pipelines)；
The air outlet slit of second suspended body flowmeter 7 is connected with hollow 21 top of air mixing chamber；
The hotair chamber 8 is used to export the air (preferably compressed air) after heating, the hotair chamber 8
Air outlet slit is connected by a main connecting tube 14 with the air intake of the 4th suspended body flowmeter 18, the 4th float-type
The air outlet slit of meter 18 is connected with the top of second liquid container 19, and preset the is stored in the second liquid container 19
Dicarbaldehyde solution.
It should be noted that specific implementation on, preset second formalin include formaldehyde solute, methanol solute and
Aqueous solvent, wherein the mass fraction ratio between the formaldehyde solute, methanol solute and aqueous solvent is：(37%~40%)：(8%
~14%)：(46%~55%).
The top of the second liquid container 19 is also connected with the right end of the air mixing chamber 21；
The left end of the main connecting tube 14 is also connected with the air intake of third float-type 15；
The air outlet slit of the third float-type 15 is connected by a liquor charging pipeline 150, the liquor charging pipeline 150
The container cover having through the top of the first liquid container 16 is stored with preset first formaldehyde in first liquid container 16
The lower part of solution, the liquor charging pipeline 150 is extend into below the preset first formalin liquid level；
It should be noted that in specific implementation, preset first formalin can be with preset second first
Aldehyde solution is identical, also includes formaldehyde solute, methanol solute and aqueous solvent, wherein the formaldehyde solute, methanol solute and aqueous solvent
Between mass fraction ratio be：(37%~40%)：(8%~14%)：(46%~55%).
21 top of the air mixing chamber is also connected with the top of first liquid container 16, certainly, needs to illustrate
, container cover that connecting pipeline between the two has through first liquid container, 16 top.
In the present invention, it should be noted that the oil strainer 4 is by shell, separator, filter core, sewage component
Deng composition.After the compressed air containing a large amount of oily solid impurities enters separator, along the rotation of its inner wall and under, generated centrifugation
Effect makes the oily precipitation from steam flow and downward along wall flows to oil eliminator bottom, then carries out smart filtering by filter core again, therefore,
Oily solid impurity in compressed air containing a large amount of oily solid impurities can be effectively removed.For the oil filtering
Device 4 has very high filter efficiency (up to 98% because filter core is folded using thick, thin, ultra-fine three kinds of fibrous filters
More than) and resistance it is small, when gas passes through filter core, due to the blocking of filter core, inertial collision and intermolecular Van der Waals force are quiet
Electrical attraction and pull of vacuum and be firmly adhered on filter material fiber, and gradually increase become drop, under the effect of gravity
Separator bottom is instilled, finally oily solid impurity is discharged by blowdown valve.
The water filter 5 can also be made of shell, separator, filter core, sewage component etc..When containing water droplet impurity
After compressed air enters separator, along its inner wall rotation and under, generated centrifugal action, make oil from steam flow be precipitated and along wall to
Under flow to separator bottom, smart filtering is then carried out by filter core again, therefore, can will be in the compressed air containing water droplet impurity
Water droplet impurity be effectively removed.Because filter core is folded using thick, thin, ultra-fine three kinds of fibrous filters, have very
High filter efficiency (up to 98% or more) and resistance is small, when gas passes through filter core, due to the blocking of filter core, inertial collision
And intermolecular Van der Waals force, electrostatic attraction and pull of vacuum and be firmly adhered on filter material fiber, and gradually increase
Become drop greatly, instill separator bottom under the effect of gravity, finally water droplet impurity is discharged by blowdown valve.
In the present invention, the effect of first suspended body flowmeter 6 is to control to adjust the novel first of the utility model
Total flow in aldehyde generator passes through the adjusting of the flow knob of the flowmeter, thus it is possible to vary be supplied to the air of system pipeline
Flow.In specific implementation, the band adjusting that the model LZM-15 of the Calis A Si (ASCARI) company production may be used (can
Adjust flow rate zone be 1~10 liter/min) flowmeter.
The effect of second suspended body flowmeter 7 is to adjust the air mass flow of bypass line, passes through the stream of the flowmeter
Measure the adjusting of knob, thus it is possible to vary lead to the flow of the air of air mixing chamber 21, that is, changes the flow of diluted air, to
The concentration of formaldehyde of air mixing chamber 21 can be adjusted.In specific implementation, the production of the Calis A Si (ASCARI) company may be used
The band of model LZM-6T adjusts the flowmeter of (adjustable flow section is 0.5~5 liter/min).
The effect of the third suspended body flowmeter 15 is the air mass flow adjusted into the first liquid container 16, by this
The adjusting of the flow knob of flowmeter, thus it is possible to vary enter the air mass flow of the first liquid container (16).It, can be in specific implementation
Using the band of the model LZM-6T of the Calis A Si (ASCARI) company production to adjust, (adjustable flow section is 0.5~5 liter/min
Clock) flowmeter.
The effect of 4th suspended body flowmeter 18 is the air mass flow adjusted into second liquid container (19), is passed through
The adjusting of the flow knob of the flowmeter, thus it is possible to vary enter the air mass flow of the first liquid container (19).In specific implementation,
May be used the Calis A Si (ASCARI) company production model LZM-6T band adjust (adjustable flow section be 0.5~5
Liter/min) flowmeter.
In the present invention, in specific implementation, the air inlet pipe 2 is connected with external source of air, preferably：It is described into
Tracheae 2 is connected with the air outlet slit of extraneous air compressor, by air compressor, after being passed through compression to air inlet pipe 2
Air.
In the present invention, in specific implementation, referring to Fig. 1, there are one first switch ball valves for setting in the air inlet pipe 2
3, the first switch ball valve 3 is located at the outside of the shell 1.Specifically connection structure is：The air of the first switch ball valve 3
Entrance is connected with the air inlet pipe 2, and the air outlet slit of the first switch ball valve 3 is connected with the entrance of the oil strainer 4
It is logical.The first switch ball valve 3 is used to control the disconnection or conducting between the air inlet pipe 2 and the entrance of oil strainer 4.
In the present invention, in specific implementation, referring to Fig. 1, the air outlet slit of second suspended body flowmeter 7 with it is described
Second switch ball valve 20 is provided in connecting line between air mixing chamber 21.The second switch ball valve 20 is for controlling institute
State the disconnection or conducting between the air outlet slit and the air mixing chamber 21 of the second suspended body flowmeter 7.
In the present invention, it should be noted that especially by hollow pipe between the component that any two is connected
Road, which is realized, to be interconnected.
In the present invention, referring to Fig. 1, the hotair chamber 8 to being passed through air therein for heating, institute
The outer wall for stating hotair chamber 8 is provided with electric heating wire, and the electric heating wire is heated with a solid-state relay 13, one successively
Switch 12 is mutually conductively connected with a temperature controller 11；
The solid-state relay 13 is connected with an external dc power, the output voltage root of the external dc power
It is configured according to the needs of user；
There are one thermocouple 10, the thermocouple 10 and the temperature controllers for the inside right end setting of the hotair chamber 8
11 are connected by signal wire, and the thermocouple 10 is used to detect the air temperature value inside the hotair chamber 8, then sends out
Give the temperature controller 11.
In specific implementation, the outside of the electric heating wire, which also covers, is provided with insulating layer, to improve the heating of electric heating wire
Effect reduces the speed in the heat diffusion to extraneous air that electric heating wire generates.
In specific implementation, the hotair chamber 8 is the structure of cylinder, both ends sealing.
In specific implementation, the air communication pipe 80 of bending distribution, the air communication are provided in the hotair chamber 8
The left and right ends of pipe 80 are connected with the air intlet of hotair chamber 8 and air outlet slit respectively, so that floating by first
The air outlet slit of subflow gauge 6 conveys the air to come, then the air communication pipe 80 that will be flowed into hotair chamber 8 exists
After being heated in hotair chamber 8, flowed out from the air outlet slit of 8 right end of hotair chamber.
In specific implementation, the hotair chamber 8 is preferably the 304 stainless steels using 15 cm diameters, 2 millimeters of wall thickness
Make, the copper pipe of full 8 millimeters of the diameter of inside filling, is connected using U-tube between copper pipe, the copper pipe of entire hotair chamber mutually interconnects
It connects.
In specific implementation, the air communication pipe 80 is preferably the copper pipe of U-shaped, and diameter is preferably 8 millimeters.The air adds
Hot cell 8 can heat the air flowed through in the air communication pipe 80, ensure after 80s defeated by the air communication pipe
The air gone out can reach 11 preset temperature of temperature controller.
In the present invention, it should be noted that the temperature controller 11 is transported with the thermocouple 10 and one respectively
Row control unit is connected, the air temperature value inside hotair chamber 8 for receiving the output of the thermocouple 10, then
Air temperature value inside the hotair chamber 8 is compared with preset temperature value, and temperature comparison result is sent to
Run control unit；
The operation control unit, is connected with solid-state relay 13, the temperature for being sent according to the temperature controller 11
Comparison result sends corresponding control signal to the solid-state relay 13, control the solid-state relay 13 unlatching or
It disconnects；
The temperature comparison result includes three kinds, specially：Air temperature value inside the hotair chamber 8 is more than pre-
If the air temperature value inside temperature value, the hotair chamber 8 is equal to inside preset temperature value and the hotair chamber 8
Air temperature value is less than preset temperature value, and therefore, accordingly, operation control unit is according to these temperature results, respectively transmission pair
The control signal answered is：It disconnects control signal, keep on off state invariance control signal and opening control signal.
In the present invention, in specific implementation, the operation control unit can be a central processor CPU or
One single-chip microprocessor MCU or other electronic units with signal processing control function.
In the present invention, it should be noted that the temperature controller 11 is used to read the sky of operation control unit output
Gas heats the preset temperature value of room, and the temperature controller is used to read the temperature of the hotair chamber of the output of the thermocouple 10
It spends signal and compared with preset temperature value, then comparison result is exported and gives operation control unit；
The operation control unit exports corresponding control signal to the solid-state relay 13, control according to comparison result
Make the on off state of the solid-state relay 13.
In specific implementation, it is U.S. control (MEACON) digital readout temperature controller and intelligent temperature that brand, which may be used, in the temperature controller 11
Display instrument, model PT100PID.
In the present invention, the solid-state relay 13, the start and stop for controlling heater switch 12.In specific implementation,
The solid-state relay of Omron OMRON companies production, model G3NA-D210B may be used.
The heater switch 12 is connected with the electric heating wire of 8 outer wall of the hotair chamber, leads to package for controlling
In the power supply of the electric heating wire of 8 outer wall of hotair chamber, when heater switch 12 is in the position opened, the electricity of hotair chamber 8
Heater strip is in heating work state, and when heater switch is in the position closed, the electric heating wire of hotair chamber 8, which is in, to be stopped
Heated condition.
Temperature value for reading the temperature of hotair chamber 8, and is fed back to temperature controller 11 by the thermocouple 10.Specifically
In realization, the armoured thermal resistance that brand is U.S. control (MEACON), the thermocouple of model PT100KTJ types may be used.
In the present invention, in specific implementation, the main connecting tube 14 is made of polytetrafluoroethylene material, main ruler
Very little is 8 millimeters of diameter, 0.5 millimeter of wall thickness.
In the present invention, in specific implementation, first liquid container 16 and second liquid container 19 are using quartz
The material of glass makes, and thickness is 5~6 millimeters of
In the present invention, in specific implementation, 19 upper top of first liquid container 16 and second liquid container
Container cover is made of polytetrafluoroethylene (PTFE), and is opened or disconnected for controlling equipped with check valve is carried in the container cover
The pipeline passed through.
In the present invention, in specific implementation, the gas mixer chamber 21 uses wall thickness for 2 millimeters of 304 stainless steels
It makes, a diameter of 15 centimetres, there is sealing plate at both ends, reserve air intlet and air outlet slit respectively, specifically in cylindrical barrel
It is upper to reserve three a diameter of 8 millimeters of air inlets.
In the present invention, in specific implementation, the bottom surface of the shell 1 is equipped with multiple universal wheels 100, so as to
To facilitate the novel methylene generator by the utility model to move.
It should be noted that for the utility model, by the compressed air of hotair chamber 8, it is divided into two-way：The first via
Enter the first liquid container 16 by third suspended body flowmeter 15, then (i.e. air enters institute using the occurring principle of Bubbling method
State and carried out in preset first formalin) by this air all the way introduce high-concentration formaldehyde gas (concentration range is 1~
10mg/m3).It is finally connect again with air mixing chamber 21, the air of this first via is imported into air mixing chamber 21；Second tunnel
Enter second liquid container 19 by the 4th suspended body flowmeter 18, then skims over preset second formalin using air
The method on surface, this air all the way can be introduced to low concentration formaldehyde, and (concentration range is 0.005~0.2mg/m3), finally again
It is connect with air mixing chamber 21, the air on this second tunnel is also introduced into air mixing chamber 21.
In order to which the utility model is more clearly understood, the occurring principle of Bubbling method is illustrated below.
The principle of " Bubbling method " is specially：When the gas with certain temperature and pressure is passed through formalin, due to first
There is aldehyde volatility and the concentration difference of gas and solution interface, the formaldehyde molecule in solution can enter gas from liquid, make
The mixed gas for by the gas of solution becoming that there is certain concentration of formaldehyde, since the gas with certain pressure is passed through liquid,
A series of bubble can be formed in liquid solution, therefore, referred to as " Bubbling method ".In 15~101 degree of temperature range, it is passed through formaldehyde
The gas temperature of solution is higher, and formaldehyde molecule is easier to enter in gas in corresponding liquid, therefore increases the concentration of gas, then
Can generate high concentration formaldehyde gas (concentration range be 1~10mg/m3)。
In addition, the gas skims over the method that formaldehyde analyzes pure solution surface, this air all the way can be introduced low concentration first
The concrete principle of aldehyde is：Since formalin has certain volatility, can be formed centainly in the upper air section of formalin bottle
The formaldehyde gas of concentration can take away this part formaldehyde gas of formation when there is air to skim over the formaldehyde pure solution surface of analysis,
After taking away, concentration difference just is formed on formalin surface and upper air contact surface, then in formalin surface and gas
The part of contact constantly has new formaldehyde molecule to enter in gas from solution again, so constantly carries out, is then skimmed over by air
The method on formalin surface, can generate low concentration formaldehyde gas (concentration range be 0.005~0.2mg/m3)。
For the utility model, when the formaldehyde that the air of the first via enters in the first liquid container 16 analyzes pure solution,
It can be adjusted by the third suspended body flowmeter 15 of ranging from 0~5 liter/min of air mass flow, various concentration may be implemented
The generation of the formaldehyde gas of range needs (i.e. production needs).
For the utility model, when needing to be evaluated formaldehyde examination performance to air quality sensor, air purifier etc.
Equipment provide formaldehyde gas concentration range, need control in 0.01~0.3mg/m3It, can be by third float stream when interior
The air mass flow speed of gauge 15 is adjusted to 0L/ minutes, and the second road air after heating is only allowed to pass through the 4th suspended body flowmeter
18 enter second liquid container 19, then only skim over the surface that the formaldehyde stored in second liquid container 19 analyzes pure solution,
Then that road (that road air that air mixing chamber 21 is entered by the second suspended body flowmeter 7) carries out with clean air again
Mixing.
And when the first for the equipment offer for needing to be evaluated formaldehyde examination performance to air quality sensor, air purifier etc.
The concentration range of aldehyde gas needs control in 0.2~5mg/m3When interior, third suspended body flowmeter 15 and the 4th can be floated simultaneously
Subflow gauge 18 open, so as to realize higher concentration formaldehyde gas generation demand.
In addition, if needing that higher concentration (3~15mg/m occurs3) formaldehyde gas, it is floating that second can also be completely closed
Subflow gauge 7 and the 4th suspended body flowmeter 18 so that be not passed through in this two-way air to air mixing chamber 21, pass fully through third
Suspended body flowmeter 15 arrive into the first liquid container 16 that air, the road air enter the first in the first liquid container 16 all the way
When aldehyde analyzes pure solution, by hot-air Bubbling method, the formaldehyde of higher concentration can occur.
In the present invention, in specific implementation, the liquor charging pipeline 150 is due to extending into 16 memory of the first liquid container
The formaldehyde of storage is analyzed below pure solution, preferably using the hose for the fluorubber that will not generate suction-operated to organic matter and water；
Air line between other connecting components is made of polytetrafluoroethylene (PTFE) material.Therefore, the air line of the utility model is adopted
Interference will not be generated with occurrence quantity to the component of target contaminant, ensure that final formaldehyde with polytetrafluoroethylene (PTFE) and air line
The generation quality of gas.
It should also be noted that, for a kind of novel methylene generator provided by the utility model, air heating therein
Room will enter formaldehyde to analyze pure solution interior or skim over the air that formaldehyde analyzes pure solution surface for heat, can will be empty
The temperature of gas is heated above the boiling temperature that formaldehyde analyzes pure solution, is more conducive to the generation of formaldehyde.Wherein, whole device,
Compressed air is broadly divided into three tunnels：The first via is (to pass through the second float stream without the cleaned air that hotair chamber 8 heats
Gauge 7 is flowed into the air of air mixing chamber 21), it can be excessively high to dilute by adjusting this second suspended body flowmeter 7 all the way
Generation concentration；Second tunnel is the air heated by hotair chamber 8, simply by hot-air in the first liquid container 16
The principle that formaldehyde analyzes pure liquid level is skimmed over, the formaldehyde gas of low concentration can occur；Third road is added by hotair chamber 8
The air of heat uses the principle of Bubbling method in second liquid container 19, the formaldehyde of higher concentration can occur；Finally, for
It, can to adjust the different air mass flows of this three roads air by adjusting corresponding suspended body flowmeter for operating personnel
To realize the generation of the formaldehyde gas from low concentration to high concentration.
In addition, being designed according to the principle of heat exchanger in hotair chamber, the air themperature that hotair chamber can be made to export
More than the boiling temperature (boiling point is at 101 °) that the formaldehyde of industry analyzes pure solution, the generation of formaldehyde may be implemented.Formaldehyde analysis is pure
Preset first formalin and preset second formalin specifically may be used in solution, specifically includes formaldehyde solute, methanol
Solute and aqueous solvent, wherein the mass fraction ratio between the formaldehyde solute, methanol solute and aqueous solvent is：(37%~
40%)：(8%~14%)：It is 37%-40% that (46%~55%) general common pure solution of formaldehyde analysis, which is content of formaldehyde,
(mass fraction), methanol content 8-14% (mass fraction), remaining is water
In addition, the purposes of air mixing chamber is, the compressed air on three tunnels is mixed, realizes more stable concentration of formaldehyde
Occur.
In summary technical solution is it is found that compared with prior art, a kind of novel methylene hair provided by the utility model
Raw device, can be effectively that air quality sensor, air purifier etc. need the equipment for being evaluated formaldehyde examination performance to carry
For the formaldehyde gas of preset concentration range, can be used for demarcating formaldehyde sensor, can also be used as air purifier for
The occurring source of the dirt content test of formaldehyde.The utility model specifically has technological merit below：
1, it skims over the pure solution surface of formaldehyde analysis using hot-air and hot-air is blown into formaldehyde and analyze inside pure solution
The design principle that combines of two methods, may be implemented to prepare (occur) super low concentration (such as 0.01mg/m3) arrive high concentration (such as
5mg/m3) formaldehyde gas concentration, be not only suitable for, for the calibration range of architecture indoor air formaldehyde sensor, can be also suitably used for
Air purifier formaldehyde holds the evaluation and test of dirty performance.
Wherein, when needing to prepare the formaldehyde gas of low concentration, second liquid container 19 is skimmed over only with hot-air
The formaldehyde of interior storage is analyzed pure solution surface and be can be realized；When needing the formaldehyde gas of higher concentration, can together be opened with two-way,
It is that hot-air skims over the pure solution surface of formaldehyde analysis stored in second liquid container 19 all the way, another way is Bubbling method, will be empty
Gas enters the formaldehyde in the first liquid container 16 and analyzes inside pure solution, forms the formaldehyde gas of high concentration, and two-way together can be with
Higher concentration occurs to may be implemented to send out by adjusting the air mass flow of third suspended body flowmeter and the 4th suspended body flowmeter respectively
Raw different concentration.
2, in the present invention, it is used for the hotair chamber of heated compressed air, may be implemented to adding by the air
The air in hot cell is adjusted into trip temperature in the range of 25~150 °, and is set into trip temperature by temperature controller, and then air adds
The temperature in hot cell feeds back to temperature controller by temperature sensor (such as thermocouple), then by fixed relay and heater switch,
Sleeving temperature control and reponse system, which are realized, in this way adjusts the temperature of hotair chamber.
3, the suspended body flowmeter divided using four air mass flows ranging from 0~5L/, can adjust the stream of different air flues
Amount realizes the needs for the different generation concentration of formaldehyde gas.
4, the first liquid container and second liquid of pure solution (solution is fluid contaminants) are analyzed for holding formaldehyde
The container cover prepared equipped with the polytetrafluoroethylene (PTFE) material with check valve on container, had both ensured that air-flow can smoothly enter into liquid bottles
It is interior, it goes out, and play sealing function, external environment will not be polluted because of the evaporation of pollutant after then carrying formaldehyde.
5, formaldehyde generator provided by the utility model, principle is simple, of low cost, in addition to it formaldehyde can occur,
In specific implementation, different heating temperatures can also be set according to the boiling point of different gas pollutants, realized for different
The generation of gas, it is economical and practical.
6, it using formaldehyde generator provided by the utility model, is found by examining, can provide and meet Unite States Standard
ANSI/ASHRAE145.1-2015《Gas phase air cleaning system performance obtained in laboratory assesses test method》Air formaldehyde pollution
Object can also provide Chinese Industrial Standards (CIS) GB18801-2015《Air purifier》In for needed for air purifier formaldehyde performance test
Gaseous formaldehyde concentration range, in addition it is also possible to for the similar pollutant of other properties generation.
In conclusion compared with prior art, a kind of novel methylene generator provided by the utility model is used as first
Aldehyde occurring source can produce the formaldehyde gas of preset concentration range, can be supplied to air quality sensor, air purifier etc.
It needs the equipment for being evaluated formaldehyde examination performance and other desired occasion to use, is conducive to widely promote and apply, have
Great production practices meaning.
In addition, for a kind of novel methylene generator provided by the utility model, the formaldehyde preparation speed having (is sent out
Raw amount) controllably, user can be met well and need to be evaluated formaldehyde examination to air quality sensor, air purifier etc.
It is used when the equipment of performance is evaluated.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of novel methylene generator, which is characterized in that the left side of the shell (1) including hollow sealing, the shell (1) is set
It sets there are one air inlet pipe (2), the air inlet pipe (2) enters with one oil strainer (4) after the left side wall of the shell (1)
Mouth is connected；
The outlet of the oil strainer (4) is connected with the entrance of a water filter (5), the outlet of the water filter (5)
It is connected with the air intake of the first suspended body flowmeter (6)；
First suspended body flowmeter (6) adds with the air intake of the second suspended body flowmeter (7) and a hollow air respectively
The air intlet in hot cell (8) is connected；
It is connected at the top of the air outlet slit of second suspended body flowmeter (7) and a hollow air mixing chamber (21)；
The formaldehyde gas that the air outlet slit of the hotair chamber (8) can generate adjustable concentration formaldehyde gas with one is tied
The air intake of structure is connected；
The air outlet slit of the formaldehyde gas recurring structure is connected with the air mixing chamber (21).
2. novel methylene generator as described in claim 1, which is characterized in that the formaldehyde gas recurring structure includes the 4th
Suspended body flowmeter (18), second liquid container (19), third float-type (15) and the first liquid container (16)；
Wherein, the air outlet slit of the hotair chamber (8) passes through a main connecting tube (14) and the 4th suspended body flowmeter
(18) air intake is connected, the top of the air outlet slit and second liquid container (19) of the 4th suspended body flowmeter (18)
It is connected, preset second formalin is stored in the second liquid container (19)；
The top of the second liquid container (19) is also connected with the right end of the air mixing chamber (21)；
The left end of the main connecting tube (14) is also connected with the air intake of the third float-type (15)；
The air outlet slit of the third float-type (15) is connected by a liquor charging pipeline (150), the liquor charging pipeline
(150) run through the container cover having at the top of first liquid container (16), be stored in first liquid container (16) pre-
If the first formalin, the lower part of the liquor charging pipeline (150) is extend into below the preset first formalin liquid level；
Also it is connected with the top of first liquid container (16) at the top of the air mixing chamber (21).
3. novel methylene generator as claimed in claim 2, which is characterized in that preset first formalin and default
The second formalin it is identical, include formaldehyde solute, methanol solute and aqueous solvent.
4. novel methylene generator as described in claim 1, which is characterized in that the air inlet pipe (2) is compressed with extraneous air
The air outlet slit of machine is connected.
5. novel methylene generator as claimed in claim 2, which is characterized in that there are one for setting on the air inlet pipe (2)
One switching ball (3), the first switch ball valve (3) are located at the outside of the shell (1)；
It is provided in connecting line between the air outlet slit and the air mixing chamber (21) of second suspended body flowmeter (7)
Second switch ball valve (20).
6. novel methylene generator as described in claim 1, which is characterized in that the outer wall of the hotair chamber (8) is arranged
Have an electric heating wire, the electric heating wire successively with a solid-state relay (13), a heater switch (12) and a temperature controller
(11) it is mutually conductively connected；
The solid-state relay (13) is connected with an external dc power.
7. novel methylene generator as claimed in claim 6, which is characterized in that be provided in the hotair chamber (8) curved
The air communication pipe (80) of song distribution, the left and right ends of the air communication pipe (80) air with hotair chamber (8) respectively
Import is connected with air outlet slit.
8. novel methylene generator as claimed in claim 7, which is characterized in that the outside of the electric heating wire also covers setting
There is insulating layer；
The air communication pipe (80) is the copper pipe of U-shaped；
The bottom surface of the shell (1) is equipped with multiple universal wheels (100).
9. the novel methylene generator as described in any one of claim 6 to 8, which is characterized in that the hotair chamber (8)
The setting of inside right end there are one thermocouple (10), the thermocouple (10) is connected with the temperature controller (11) by signal wire
It connects, the thermocouple (10) is used to detect the internal air temperature value of the hotair chamber (8), is then sent to the temperature control
Device (11).
10. novel methylene generator as claimed in claim 9, which is characterized in that the temperature controller (11), respectively with the heat
Galvanic couple (10) is connected with an operation control unit, in the hotair chamber (8) for receiving the thermocouple (10) output
The internal air temperature value of the hotair chamber (8) is then compared by the air temperature value in portion with preset temperature value, and
Temperature comparison result is sent to operation control unit；
The operation control unit is connected with solid-state relay (13), the temperature for being sent according to the temperature controller (11)
Comparison result sends corresponding control signal and gives the solid-state relay (13), controls the unlatching of the solid-state relay (13)
Or it disconnects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721580535.6U CN207730718U (en) | 2017-11-23 | 2017-11-23 | A kind of novel methylene generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721580535.6U CN207730718U (en) | 2017-11-23 | 2017-11-23 | A kind of novel methylene generator |
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| Publication Number | Publication Date |
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| CN207730718U true CN207730718U (en) | 2018-08-14 |
Family
ID=63088564
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727807A (en) * | 2017-11-23 | 2018-02-23 | 天津商业大学 | A kind of novel methylene generator |
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2017
- 2017-11-23 CN CN201721580535.6U patent/CN207730718U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727807A (en) * | 2017-11-23 | 2018-02-23 | 天津商业大学 | A kind of novel methylene generator |
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