Alcohol content tester is traffic police tool, belongs to a kind of measurement instrument, only simultaneously by the calibrating of metrological service
The alcohol content tester for obtaining calibration certificate just has legitimacy.How alcohol content tester is examined and determine firstly the need of there is proof-spirit gas
Body.Proof-spirit gas currently used for calibrating is divided into two kinds: dry gas and moisture.So-called moisture is simulated by wet type alcohol
The proof-spirit gas that device generates；So-called dry gas is the proof-spirit gas in steel cylinder prepared using weight method, by
There is no moisture in such alcohol gas, because of referred to herein as dry gas.Since dry gas source tracing method is simple, our national regulations are used
Ethyl alcohol (alcohol) gas has card level-one gas reference material as trace to the source standard, but primary standard alcohol gas price in air
Valuableness, cyclinder gas are not easy to transport, and capacity is limited, and access times are few, and therefore, vertification regulation also allows using various ethyl alcohol
The proof-spirit gas that source device generates occurs for (alcohol) gas, and the proof-spirit gas generated to such device proposes surely
Qualitative and uncertainty etc. is traced to the source requirement.
Referring to Fig. 1, application No. is 201320830646.3 Chinese utility model patent, " a kind of alcohol content of exhalation gas contains
Amount detector calibrating installation " a kind of proof-spirit gas generation apparatus is disclosed, also with good grounds patent production in the market
Product selling, but proof-spirit gas generation apparatus disclosed in the utility model patent can also change in following several respects
1, device must continuous operation and air blowing.In the patent and product, by the way that sample gas A (nitrogen) is passed through generator
The mode being bubbled in liquid absolute alcohol in 2 is being mixed to generate saturation or close to the alcohol gas of saturation, then with carrier gas B
The proof-spirit gas C of wanted concentration is obtained after being diluted in clutch 6 to alcohol gas.Should during involved in pipeline and
Dead space is had in generator and is bubbled and needs to stablize the time, and if it is intermitten service, then the gas blown out every time cannot reach steady
Fixed concentration, therefore only continuous operation could be discharged dead space air and reach steady concentration.But continuous operation is not preferable
Working method, it can generate many exhaust gas.Each air blowing examined and determine alcohol content tester and generally only need 3~10 second time, one
The quantity of its calibrating alcohol content tester is also limited, therefore, in the most of the time most by the proof-spirit gas of device generation
All it is to be discharged as exhaust gas afterwards, not only causes to waste, but also pollution environment.
2, the proof-spirit gas that device generates is easy affected by environment.Although the patent and product are to generator 2
And mixer 6 has carried out heating and temperature control, but not to the nitrogen A before entering generator 2 and enters mixing
Carrier gas B before device 6 carries out temperature control.Since heat exchange needs the time, and heating device is to the heat exchanger time of gas
Comparing liquid will grow very much, and therefore, any temperature control is required to adjustment time, when the nitrogen of different temperatures continuously enters hair
It, can be to the liquid of lower section in the generator 2 in temperature constant state since thermostat has little time to carry out temperature adjusting when raw device 2
Alcohol and the gaseous state alcohol of top cause thermal perturbation, and nitrogen flow is bigger, then thermal perturbation is bigger.In this case, nitrogen
, can not be very high to the temperature-controlled precision of liquid alcohol in generator 2 when gas is continuously entered in generator 2, to the gaseous state of top
The temperature-controlled precision of alcohol can be worse, and generator 2 in generate proof-spirit gas concentration stability and uncertainty with
The temperature stability and accuracy of liquid alcohol and gaseous state alcohol have very big relationship in generator 2, therefore, if environment temperature
The accuracy of variation, then the proof-spirit gas concentration that the device generates will be impacted.For carrier gas B, enter
After in mixer 6, since the heat exchange of gas is very slow, and carrier gas B flow is larger, has little time to carry out heat exchange, even if continuously
Operation, it is also difficult to guarantee that air outlet temperature remains at 34 DEG C ± 0.5 DEG C that calibrating requires in variation of ambient temperature.
3, it is poor to be bubbled the alcohol gas concentration stability generated for single.Enter the nitrogen A in generator 2 when bubbling in liquid
Residence time is very short in alcohol, and the gas exchanges time is shorter, is unable to reach complete equipilibrium, therefore, the single as the device
The stability for being bubbled the alcohol gas concentration generated is poor.
Therefore, it is necessary to design a kind of new proof-spirit gas generating unit solve the device can only continuous work,
It is easy problem affected by environment and that alcohol gas concentration stability is poor.
Summary of the invention
The purpose of the present invention is to provide a kind of proof-spirit gas generating unit, the proof-spirit gas generated can be made
Concentration it is accurate, stablize, it is not easy to influenced by environment temperature, do not had to continuous blown work, avoid waste and environmental pollution.
To achieve the above object, the present invention provides a kind of proof-spirit gas generating unit, including container, be set to it is described
It sampling access in container, the dilution access being set in the container and is set in the container and to connect sampling logical
The mixed gas part on road and dilution access；
Non- alcohol gas is contained in the container；
The sampling access include the third air pump sequentially arranged, 2/2-way solenoid valve, buffer unit, the first air pump,
It is loaded with the alcohol gas generator, the first mass flow controller and the first two-bit triplet solenoid valve of liquid alcohol；Described
The first end of three air pumps accesses the non-alcohol gas, and second end connects the first end of the 2/2-way solenoid valve；Described two
First air inlet of the second end connection buffer unit of two three-way electromagnetic valves of position；The gas outlet of buffer unit connect the first air pump into
Gas end；The inlet end of the outlet side connection alcohol gas generator of first air pump；The outlet side connection the of alcohol gas generator
The arrival end of one mass flow controller；The outlet end of first mass flow controller connects the of the first two-bit triplet solenoid valve
One end；The second end of first two-bit triplet solenoid valve connects the first inlet end of mixed gas part, and third end connects the of buffer unit
Two air inlets；It is connected to the first end and second end of the first two-bit triplet solenoid valve, the sampling access switches to air blowing work
Operation mode, is connected to first end and the third end of the first two-bit triplet solenoid valve, and the sampling access switches to cycle operation
The dilution access includes the second air pump, the second mass flow controller and the second two-bit triplet sequentially arranged
Solenoid valve；The inlet end of second air pump accesses the non-alcohol gas, and outlet side connects the second mass flow controller
Arrival end；The outlet end of second mass flow controller connects the first end of the second two-bit triplet solenoid valve；The second two
The second end of three-way magnetic valve connects the second inlet end of mixed gas part, and the non-alcohol gas is led to by pipeline in third end；Even
Lead to the first end and second end of the second two-bit triplet solenoid valve, the dilution access switches to blown work mode, connection
The first end of the second two-bit triplet solenoid valve and third end, the dilution access switch to circulating working mode；
The outlet side of the mixed gas part is for connecting alcohol content tester to be examined and determine.
The container is divided into first chamber and second chamber by barricade；It is contained in the first chamber and second chamber
Non- alcohol gas；The mixed gas part is set in second chamber.
Heated constant temperature device or the first chamber are installed, heating is permanent with installing respectively in second chamber in the container
The sampling access is all set in the second chamber；Sampling hole, the third gas are offered on the barricade
The first end of pump accesses the non-alcohol gas by the sampling hole.
The second air pump in the dilution access is set in the first chamber, the second mass flow controller and second liang
Position-3-way solenoid valve is set in the second chamber；Via hole and return port are also provided on the barricade；Second air pump
Outlet side passes through the arrival end that the via hole connects the second mass flow controller；The pipeline leads to institute via the return port
State non-alcohol gas.
Equipped with control unit and the temperature-sensing devices controlled by the control unit, pressure in the alcohol gas generator
Power sensing device and heating constant temperature controller part；Central control unit is equipped in the second chamber, for controlling each electromagnetism
Valve, mass flow controller and described control unit.
Optionally, the first chamber is integral formula closed chamber, and nitrogen or air are contained in the first chamber, and
Air is connected by a pipe interface or is mounted with the steel cylinder of nitrogen.
Optionally, the first chamber is divided into mutually independent bubbled gas closed chamber, closes with diluent gas
Chamber contains nitrogen in bubbled gas closed chamber, contains air in diluent gas closed chamber.
The bubbled gas closed chamber is mounted with the steel cylinder of nitrogen, the carrier gas by the connection of the first pipe interface
Body accesses air by the second pipe interface with closed chamber.
Beneficial effects of the present invention: a kind of proof-spirit gas generating unit provided by the invention, by sampling access, dilution
Access and mixed gas part are set in container, heated constant temperature device are installed in container, so that being contained in the non-alcohol gas in container
Body and the gas for entering sampling access, dilution access and mixed gas part are in the temperature constant state that calibrating requires, so as to
It is influenced by ambient temperature to overcome the problems, such as that the prior art is easy.The sampling access is switched by the first two-bit triplet solenoid valve
Circulation pattern and blow mode, the dilution access switch circulation pattern and air blowing mould by the second two-bit triplet solenoid valve
Formula, and do not have to the continuous blown work as the prior art, under circulation pattern, alcohol gas that alcohol gas generator volatilizes
Body is slow in the-the first air pump of buffer unit-alcohol gas generator the-the first two-bit triplet of the-the first mass flow controller solenoid valve-
Circulation between flushing device, and enter in alcohol gas generator and be bubbled repeatedly, the alcohol gas of generation can be increased
The stability of bulk concentration, and exhaust gas will not be generated, avoid waste and environmental pollution.
Further to illustrate technological means and its effect adopted by the present invention, below in conjunction with preferred implementation of the invention
Example and its attached drawing are described in detail.
The present invention provides a kind of proof-spirit gas generation apparatus.Fig. 2 show proof-spirit gas of the invention and generates
The first embodiment of device including container 10, the sampling access A being set in the container 10, is set in the container 10
Dilution access B and be set in the container 10 and connect sampling access A and dilute the mixed gas part C of access B.
The container 10 selects stainless steel or other materials to be made, and is divided into first chamber E and second by barricade 101
Chamber F, and heated constant temperature device (not shown) is installed respectively in the first chamber E, second chamber F and makes first chamber E,
Two chamber F are in temperature constant state, usually examine and determine required by alcohol content tester 34 DEG C ± 0.5 DEG C.In this first embodiment,
The first chamber E is integral formula closed chamber, and the non-alcohol gas such as nitrogen or air is contained in first chamber E.
The sampling access A is all set in the second chamber F, including sequentially arrange third air pump A0, two two
Three-way electromagnetic valve A1, buffer unit A6, the first air pump A2, the alcohol gas generator A3 for being loaded with liquid absolute alcohol, the first mass
Flow controller (Mass Flow Controller, MFC) A4 and the first two-bit triplet solenoid valve A5.The third air pump A0
First end A01 the nitrogen or sky that first chamber E is contained are accessed by the sampling hole 102 that is provided on the barricade 101
Gas, second end A02 connect the first end A11 of the 2/2-way solenoid valve A1；The second end of the 2/2-way solenoid valve A1
The first air inlet A61 of A12 connection buffer unit A6.Buffer unit A6 can be surge flask or similar container, and capacity can be with
Determine as needed, but the bigger buffering effect of capacity is better, there are two air inlets for it: the first air inlet A61 and the second air inlet
A63, a gas outlet A62, effect are that the gas pressure buffered in gas circuit fluctuates and plays the role of gas source.Buffer unit A6
Gas outlet A62 be connected with the inlet end A21 of the first air pump A2；The outlet side A22 of first air pump A2 connects alcohol gas
The inlet end A31 of device A3.Alcohol gas generator A3 be a container, built-in a certain amount of liquid absolute alcohol, at least one into
Gas end A31 and an outlet side A32, inlet end A31 are passed under alcohol liquid level, and outlet side is higher than alcohol liquid level, work as inlet end
When having gas (air or nitrogen) to be passed through, bubble can be generated, A32 takes away alcohol gas from outlet side, is commonly called as being bubbled.Alcohol gas
The arrival end A41 of outlet side A32 the first mass flow controller of connection A4 of generator A3.First mass flow controller A4's
The first end A51 of outlet end A42 connection the first two-bit triplet solenoid valve A5.The second end A52 of first two-bit triplet solenoid valve A5
Connect the first inlet end C1, the second air inlet A63 of third end A53 connection buffer unit A6 of mixed gas part C.
The dilution access B includes the second air pump B1 sequentially to arrange, the second mass flow controller B2 and the second two
Three-way magnetic valve B3.Preferably, the second air pump B1 be set to the first chamber E in, the second mass flow controller B2 with
Second two-bit triplet solenoid valve B3 is set in the second chamber F.The inlet end B11 of the second air pump B1 is directly accessed described
The nitrogen or air that first chamber E is contained, outlet side B12 pass through the connection of via hole 103 the being provided on the barricade 101
The arrival end B21 of two mass flow controller B2.The outlet end B22 connection of second mass flow controller B2 described the second two
The first end B31 of three-way magnetic valve B3.The second end B32 connection of second two-bit triplet solenoid valve B3 mixes the second air inlet of gas part C
C2 is held, third end B33 connecting line B4, pipeline B4 lead to described the via the return port 104 being provided on the barricade 101 again
One chamber E.It is of course also possible to which the second air pump B1 is set in second chamber F, the inlet end B11 of the second air pump B1 is passed through and is opened
The via hole 103 being located on the barricade 101 protrudes into first chamber E, to access nitrogen or air.
The mixed gas part C is set in second chamber F, and the outlet side C3 of mixed gas part C is used to connect alcohol detection to be examined and determine
Instrument.The effect of mixed gas part C is that two-way gas is uniformly mixed as far as possible, and there are many kinds of such devices, is general technology, it is of the invention in
Do not do expansion narration.
Further, control unit (not shown) is equipped in the alcohol gas generator A3 and by the control unit control
Temperature-sensing devices (not shown), pressure-sensing device (not shown) and the heating constant temperature controller part (not shown) of system, these
Device collective effect guarantees 34 DEG C ± 0.5 DEG C that the temperature control in alcohol gas generator A3 is required in calibrating, and prevents wine
Pressure is too high or too low in smart gas generator A3.It is equipped with central control unit (not shown) in the second chamber F, for controlling
Each solenoid valve, mass flow controller and described control unit are made, sampling access A and dilute can be controlled according to actual needs
Release the work of access B.
Specifically, there are two types of operating modes by the sampling access A: blown work mode and circulating working mode.
Blown work mode: when for the first time, in use, third air pump A0 elder generation's air-breathing works, 2/2-way solenoid valve A1 is again
It is open-minded, nitrogen or air are drawn out of first chamber E by third air pump A0, the gas of absorption is entered in buffer unit A6 and pressed
Fluctuation is buffered, and the first air pump A2 passes through the inlet end A31 of alcohol gas generator A3 for the nitrogen in buffer unit A6 again
Gas or air are sent to alcohol liquid level or less and are bubbled, and take alcohol gas generator A3 to for the alcohol gas generated is bubbled
Upper end；After setting the flow (such as 200ml/min) of the first mass flow controller A4, then alcohol gas enters the first two
Three-way magnetic valve A5；The first end A51 of the first two-bit triplet solenoid valve A5 is selected to be connected to second end A52, then alcohol gas
It enters in mixed gas part C, is just produced after meeting with the dilution access B diluent gas (i.e. nitrogen or air) for being sent into mixed gas part C
The proof-spirit gas needed.Due to being mounted with heated constant temperature device respectively in the first chamber E and second chamber F, so that
The nitrogen or air that are contained in first chamber E and enter sampling access A, dilution access B, equal with the gas of mixed gas part C
The temperature constant state required in calibrating, the proof-spirit gas that mixed gas part C is generated are similarly in the temperature constant state that calibrating requires, from
And it is influenced by ambient temperature to overcome the problems, such as that the prior art is easy.
Circulating working mode: for the first time in use, third air pump A0 elder generation's air-breathing works, 2/2-way solenoid valve A1 is opened again
It is logical, and the first mass flow controller A4 is in close state, the first end A51 of the first two-bit triplet solenoid valve A5 and third end
A53 is in close state, and nitrogen or air is drawn out of first chamber E by third air pump A0, the gas of absorption enters slow
Pressure oscillation is buffered in flushing device A6, and the inlet end A31 that the first air pump A2 passes through alcohol gas generator A3 again will be buffered
Nitrogen or air in device A6 are sent to alcohol liquid level or less and are bubbled, and take alcohol to for the alcohol gas generated is bubbled
The upper end gas generator A3, end pressure can gradually increase on alcohol gas generator A3 at this time, when pressure reaches certain value or works as
To making, third air pump A0 can not draw nitrogen out of first chamber E again to pressure height or when air closes the 2/2-way solenoid valve
A1；After setting the flow (such as 200ml/min) of the first mass flow controller A4 and being at working condition, alcohol gas
Enter the first two-bit triplet solenoid valve A5；The first end A51 and third end A53 of the first two-bit triplet solenoid valve A5 is selected to connect
Logical, then alcohol gas enters the second air inlet A63 of buffer unit A6；At this point, 2/2-way solenoid valve A1, which is in, closes shape
State, then through being bubbled the alcohol gas generated just in buffer unit A6- the first air pump A2- alcohol gas generator the first mass of A3-
Circulation between flow controller A4- the first two-bit triplet solenoid valve A5- buffer unit A6, and alcohol gas is entered repeatedly
It is bubbled in generator A3, enables the alcohol gas in above-mentioned circulation path and the liquid in alcohol gas generator A3
Alcohol reaches sufficient balance, so as to increase generation alcohol gas concentration stability, and exhaust gas will not be generated, avoided
Waste and environmental pollution.
In actual work, due to the limited time of calibrating alcohol content tester, proof-spirit gas generation apparatus does not have to continuous
Blowing operation is carried out, therefore, the sampling access A most of the time is all set in circulating working mode.Under circulating working mode,
It is bubbled the alcohol gas generated and carries out iterative cycles bubbling, once it blows, by controlling the first two-bit triplet electromagnetism
Valve A5 is connected to its first end A51 with second end A52, and blocks the connection of first end A51 Yu third end A53, that is, can switch to
Blown work mode carries out blowing operation, and at this moment, 2/2-way solenoid valve A1 is closed, and the first air pump A2 is inhaled from buffer unit A6
The alcohol gas for being in equilibrium state is taken, then is sent the alcohol gas by the inlet end A31 of alcohol gas generator A3
Enter to being bubbled below alcohol liquid level, and takes the upper end alcohol gas generator A3 to for the alcohol gas generated is bubbled；Pass through
Alcohol gas enters the first two-bit triplet solenoid valve A5 after first mass flow controller A4；Select first two-bit triplet electric
The first end A51 of magnet valve A5 is connected to second end A52, then alcohol gas enters in mixed gas part C, is sent into dilution access B mixed
The diluent gas (i.e. nitrogen or air) of gas part C just produces the proof-spirit gas of needs after meeting, and will not only produce in this way
Raw exhaust gas avoids waste alcohol gas and pollutes environment, and can guarantee that sampling access A is in running order always, the wine of generation
The stability of concentration of vital essence body is higher.
Equally there are two types of operating modes by the dilution access B: blown work mode and circulating working mode.
Blown work mode: the second air pump B1 is powered on, and the second mass flow controller B2 is according to the flow (example of setting
Such as 15L/min) work, select the first end B31 of the second two-bit triplet solenoid valve B3 to be connected to second end B32, then first chamber E
Interior nitrogen or air is entered in mixed gas part C and is mixed with the sampling access A alcohol gas generated, generates the proof-spirit of needs
Circulating working mode: the second air pump B1 is powered on, and the second mass flow controller B2 is according to the flow (example of setting
Such as 15L/min) work, select the first end B31 of the second two-bit triplet solenoid valve B3 to be connected to third end B33, then first chamber E
Interior nitrogen or air is flow back into first chamber E again through the second two-bit triplet solenoid valve B3, pipeline B4 and return port 104, this
Sample diluent gas (i.e. nitrogen or air) is at first chamber E- the second air pump the second mass flow controller of B1- B2- the second two
Iterative cycles between three-way magnetic valve B3- pipeline B4- first chamber E.
In actual work, the dilution access B most of the time is equally set in circulating working mode, without carrier gas into
Enter into mixed gas part C, blow if necessary, makes its first end B31 and the by controlling the second two-bit triplet solenoid valve B3
Two end B32 connection, and block the connection of first end B31 Yu third end B33, that is, it can switch to blown work mode, set flow
Carrier gas enter in mixed gas part C with sampling access A in alcohol gas mix after carry out blowing operation.
It is worth noting that: during blowing operation, the proof-spirit gas that mixed gas part C is generated can be blown into alcohol detection
In instrument, according to relevant regulations, one time air-blowing quantity is at least 1.2L, which, which is discharged into air, is possible to that first can be polluted
Gas in chamber E, so first chamber E is preferably at air-tight state, with a small amount of caused by preventing during blowing operation
The pollution of alcohol gas.
In addition, largely from dilution access B in the proof-spirit gas that mixed gas part C is generated, fraction is logical from sampling
Road A, therefore, the nitrogen or air that can lose in a part of first chamber E of blowing each time need to guarantee continuous work
One pipe interface H is set on the side wall of first chamber E to connect the steel cylinder or air that are mounted with nitrogen, to supplement loss
Corresponding gas.For sample access A, although the alcohol gas lost when each blow mode is less, also should and constantly from
Supplement nitrogen or air in first chamber E, at this point, third air pump A0 elder generation's air-breathing works, 2/2-way solenoid valve A1 is open-minded again, and
First mass flow controller A4 is in close state, at the first end A51 and third end A53 of the first two-bit triplet solenoid valve A5
In closed state, loss is supplemented into buffer unit A6 from absorption nitrogen or air in first chamber E by third air pump A0
The gas flow fallen.Those of ordinary skill in the art should be understood that the effect of third air pump A0 is the non-wine drawn in first chamber E
Vital essence body, but its function can also replace realizing by the first air pump A2, that is, if without third air pump A0, two
Sampling hole 102 on first end A11 and first chamber the E barricade 101 of two three-way electromagnetic valve A1 of position is connected, when needs are from the first chamber
When the room negated alcohol gas of E interior suction is to supplement the gas lost, 2/2-way solenoid valve A1 can be opened, by the first air pump A2
Two can be led to the problem of from the negated alcohol gas of first chamber E interior suction, but when such use: first is that after being used for multiple times, buffering
With the presence of alcohol gas in device A6, and the gas pressure in buffer unit A6 is likely to be higher than the pressure in first chamber E
Power will lead to the alcohol gas in buffer unit A6 and flow back to first chamber E at this moment if opening 2/2-way solenoid valve A1
It is interior, the non-alcohol gas in first chamber E is polluted, causes serious consequence, causes under blown work mode, dilution access B is sent
The diluent gas for entering mixed gas part C contains alcohol gas, and mixed gas part C just can not generate proof-spirit gas required for detection；Two
It is to avoid such case, before opening 2/2-way solenoid valve A1, the first air pump A2 air-breathing can first to be allowed, slow
Alcohol gas in flushing device A6 is drawn into alcohol gas generator A3 in the space of liquid level upper end, in this way, buffer unit A6
In pressure can be gradually reduced, when in buffer unit A6 pressure be less than first chamber E in pressure when, then open 2/2-way electricity
Magnet valve A1, the first air pump A2 continue air-breathing, then the non-alcohol gas in first chamber E can be added in buffer unit A6 and
It will not flow backwards, although can theoretically do so, actually since the capacity of buffer unit A6 is generally higher than alcohol gas
The space of body generator A3 liquid level upper end, the first air pump A2 are difficult to draw the gas in buffer unit A6 to buffer unit A6
The low degree of pressure in pressure ratio first chamber E, kind structure setting are not very practical.Therefore, those of ordinary skill in the art answer
This is known, replaces the function of make-up gas with the first air pump A2 if removing third air pump A0, will lead to the present embodiment effect
Fig. 3 show the second embodiment of proof-spirit gas generation apparatus of the invention.In view of needed for sampling access A
Bubbled gas dosage it is seldom, the steel cylinder for being loaded with nitrogen can be hinged with, and diluent gas dosage needed for diluting access B is big, can
Directly to take air, so, the first chamber E is divided for mutually independent bubbled gas closed chamber E1 and dilution
Gas closed chamber E2, the bubbled gas are filled with splendid attire nitrogen in closed chamber E1 and by the first pipe interface H1 connection
It is loaded with the steel cylinder of nitrogen, the diluent gas with splendid attire air in closed chamber E2 and accesses sky by the second pipe interface H2
Gas.Remaining structure and the course of work are identical with the first embodiment, and no longer carry out repeated description herein.
In conclusion proof-spirit gas generating unit of the invention, sampling access, dilution access and mixed gas part are set
It is placed in container, heated constant temperature device is installed in container, so that the non-alcohol gas that is contained in container and entering sampling
Access, dilution access are in the temperature constant state that calibrating requires with the gas of mixed gas part, so as to overcome the prior art be easy by
The problem of ambient temperature effect；The sampling access switches circulation pattern and air blowing mould by the first two-bit triplet solenoid valve
Formula, the dilution access switches circulation pattern and blow mode by the second two-bit triplet solenoid valve, and does not have to as existing skill
Art blown work continuous like that, under circulation pattern, the alcohol gas that alcohol gas generator volatilizes is in buffer unit-the first
Recycle stream between air pump-alcohol gas generator the-the first two-bit triplet of the-the first mass flow controller solenoid valve-buffer unit
It is logical, and enter in alcohol gas generator and be bubbled repeatedly, the stability of the alcohol gas concentration of generation can be increased, and
Exhaust gas will not be generated, waste and environmental pollution are avoided.
Those of ordinary skill in the art will be appreciated that the function of heretofore described two-bit triplet solenoid valve can also lead to
Two 2/2-way solenoid valves are crossed to replace, it is not necessary to just be able to achieve institute in the embodiment of the present invention using two-bit triplet solenoid valve
The function of stating, and the position of each component can also be exchanged according to actual needs without influencing function in above-described embodiment
Those of ordinary skill in the art also will be appreciated that heretofore described container 10 is divided into first chamber E and second
Chamber F (or more chamber), in order to prevent alcohol gas caused by the sampling access A in second chamber F from once letting out
Leakage, it is possible to pollution dilution access B, but from working principle for, not necessarily need to be divided into multiple chambers, but from most
Optimize for angle, container 10 is divided into two chambers can be more preferable.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology
Other various corresponding changes and modifications are made in design, and all these change and modification all should belong to claim of the invention