CN2893693Y - Density detecting device - Google Patents
Density detecting device Download PDFInfo
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- CN2893693Y CN2893693Y CN 200520145280 CN200520145280U CN2893693Y CN 2893693 Y CN2893693 Y CN 2893693Y CN 200520145280 CN200520145280 CN 200520145280 CN 200520145280 U CN200520145280 U CN 200520145280U CN 2893693 Y CN2893693 Y CN 2893693Y
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- fuel
- monitoring device
- liquid fuel
- value
- concentration
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Abstract
This utility model is a concentration detection apparatus used to detect the concentration of liquid fuel in a container and comprises a rotary mechanism, which is under the surface of the liquid fuel and provided with a rotary center. The rotary mechanism comprises a first floating object which mass is value M, a second floating object which mass is the product of r.M and a third floating object which mass is the product of r 2.M. All the first, second and third floating objects have the same volume V, and the specific gravities of the three floating objects are not greater than the specific gravity of the liquid fuel. Since on the X-Y plane, the distance between the rotary center and the first, second and third floating objects is L, and the first, second and third floating objects are connected with each other to form a triangular structure with a 120-degree angle. Any change of the original rotary direction for the rotary center can be observed with this structure, to obtain the information to decide whether the concentration of the liquid fuel has been changed to the specified concentration.
Description
Technical field
This is novel to relate to a kind of concentration monitoring device, and particularly a kind of concentration switch of the liquid fuel concentration in order to the detecting fuel cell.
Background technology
Fuel cell is a kind of chemical energy that will be stored in fuel and the oxygenant is converted into electric energy by electrode reaction a Blast Furnace Top Gas Recovery Turbine Unit (TRT).The kind of fuel cell is quite a lot of, and the mode of classification also each is different, if distinguished, five kinds of electrolytical fuel cells of difference such as alkaline fuel cell, phosphoric acid fuel cell, Proton Exchange Membrane Fuel Cells, molten carbonate fuel cell, solid-oxide fuel cell are arranged according to the electrolyte property difference.Wherein, Proton Exchange Membrane Fuel Cells comprises so-called DMFC again, is fuel with methyl alcohol directly, and does not need first upgrading to become hydrogen, be to research and develop one of higher technology of energy at present, its application target comprises big power station, electric generators for automobile, portable power etc.
Yet,, in the commercial process of marching toward, all need overcome a problem, the i.e. control of liquid fuel concentration as the liquid fuel battery of this class of DMFC.In theory, if liquid fuel concentration is lower, and the electric power that is produced is just fewer; If liquid fuel concentration is higher, and the electric power that is produced just the more.Therefore, certainly will there be a kind of concentration monitoring device to monitor the concentration of liquid fuel at any time, to guarantee that its concentration maintains a default standard value all the time, so can keep the power supply quality of fuel cell, and electronic product can not sustain damage yet because of the electric power supply of fuel cell is unstable.
Novel content
This novel fundamental purpose provides a kind of concentration monitoring device of fuel cell, in order to monitor the concentration of the required liquid fuel of fuel cell at any time, when its concentration changes, can react in real time.
For reaching this novel above-mentioned purpose, this is novel to provide a kind of concentration monitoring device, in order to detect the concentration of the liquid fuel in the container, this concentration monitoring device comprises: a rotating mechanism, the liquid level that is positioned at this liquid fuel down and have a rotation center, this rotating mechanism comprises: one first object that floats, its proportion is to be not more than this liquid fuel proportion, and have a volume V value and a mass M value, this first barycenter and the distance of this rotation center on X-Y plane of floating object is L.One second unsteady object, link this first unsteady object, its proportion is to be not more than this liquid fuel proportion, and have this a volume V value and a quality rM value, this second barycenter and the distance of this rotation center on X-Y plane of floating object is L, and this second float object, this rotation center and this first barycenter formed angle on X-Y plane that floats object is 120 °, and wherein the r value is one greater than 0 constant.And one the 3rd object that floats, linking this first object and this second object that floats that floats, its proportion is to be not more than this liquid fuel proportion, and has this a volume V value and a quality r
2The M value, the 3rd barycenter and the distance of this rotation center on X-Y plane of floating object is L, and the 3rd barycenter formed angle on X-Y plane that floats object, this rotation center and this second unsteady object is 120 °.Can whether change its sense of rotation originally via observing this rotating mechanism by this, and know that the concentration of this liquid fuel has been changed to a specific concentrations.
Be familiar with this technician and understand this novel purpose, feature and effect for making, now by following specific embodiment, and conjunction with figs., to this novel explanation in detail as after.
Description of drawings
Figure 1A is the side view according to a specific embodiment of this novel concentration monitoring device;
Figure 1B is the schematic top plan view of rotating mechanism 14 under a state of 1 Figure 1A;
Fig. 1 C shows the schematic top plan view of rotating mechanism 14 under another state of Figure 1A;
Fig. 2 is the concentration of methanol aqueous solution and the conversion table of comparisons of proportion;
Fig. 3 is the graph of a relation of the anglec of rotation of a liquid fuel concentration of a preferred embodiment of novel concentration monitoring device and rotating mechanism;
The schematic top plan view of the rotating mechanism 14 that Fig. 4 shows Figure 1A under a state again.
Symbol description
Fuel feeding channel (1) housing (10)
First inlet (100) second inlets (102)
Outlet (104) liquid fuel (12)
Rotating mechanism (14) first unsteady objects (140)
Second unsteady object (142) the 3rd unsteady object (144)
Rotation center (145) connecting rod (146)
Embodiment
Figure 1A is the side view according to a specific embodiment of this novel concentration monitoring device.Figure 1B is the schematic top plan view of rotating mechanism 14 under a state of Figure 1A.In Figure 1A, fuel feeding channel (1) has a hollow housing (10), and in order to hold and to supply with the required fuel of a fuel cell, i.e. liquid fuel (12), and liquid fuel (12) can be a methanol aqueous solution.Fuel feeding channel (1) further comprises: first inlet (100) is in order to inject fuel to fuel feeding channel (1); Second inlet (102) is in order to inject aqueous solution to fuel feeding channel (1), with the concentration of dilution fuel; And outlet (104), in order to export the inlet (not shown) of its fuel to a runner plate of fuel cell.
This novel concentration monitoring device is the concentration in order to the liquid fuel (12) in the detecting fuel feeding channel (1), this concentration monitoring device comprises a rotating mechanism (14), be be positioned at liquid fuel (12) liquid level down and have rotation center (145), and can on X-Y plane, rotate an angle θ (shown in Figure 1B).Shown in Figure 1A, rotating mechanism (14) comprises: the first unsteady object (140), the second unsteady object (142) and the 3rd unsteady object (144), and utilize connecting rod (146) each other to link.Wherein, first quality of floating object (140) is the M value, and second quality of floating object (142) is the rM value, and the 3rd quality of floating object (144) is r
2M value, this r value are one greater than 0 constant; In addition, those unsteady objects all are by the made spheroid of resistant material, all have equal volume V value, and the neither proportion ρ greater than liquid fuel (12) of its proportion.Shown in Figure 1B, the barycenter of those unsteady objects and rotation center (145) distance on X-Y plane is all L, and second float object (142) barycenter, rotation center (145), and the first barycenter formed angle on X-Y plane that floats object (140) be 120 °, and the 3rd barycenter, rotation center (145), the second barycenter formed angle on X-Y plane that floats object (142) that floats object (144) is 120 °.
Fig. 1 C shows the schematic top plan view of rotating mechanism 14 under another state of Figure 1A.At this moment, the concentration of liquid fuel (12) changes, because the suffered buoyancy of each unsteady object (140), (142), (144) also can be along with change, thereby makes rotating mechanism (14) rotate an anglec of rotation θ on X-Y plane
1At last, first float object (140), second float object (142) and the 3rd float object (144) will be according to following torque equilibrium equation formula:
(M-ρ·V)·L·cosθ+(r·M-ρ·V)·L·cos(θ+120°)+(r
2·M-ρ·V)·L·cos(θ+240°)＝0；
Wherein, M, V, r, L are constants.By above-mentioned torque equilibrium equation formula F (θ, ρ)=0 so that rotating mechanism (14) can be issued to stationary state at the liquid level of liquid fuel (12).In addition, because the anglec of rotation θ of rotating mechanism (14)
1A correct typical value can only be arranged, therefore necessary according to following discriminant:
[ F (θ, ρ)/ θ]＞0; And determine θ
1Value, wherein symbol represents partial differential.
Novel by implementing this, so that when the concentration of liquid fuel (12) changes, detect the anglec of rotation θ of rotating mechanism (14), again according to this torque equilibrium equation formula F (θ, ρ)=0 in the hope of the proportion ρ of liquid fuel (12), thereby can converse the concentration of liquid fuel (12).Suppose that liquid fuel (12) is a methanol aqueous solution, just can see through as shown in Figure 2 methanol aqueous solution concentration and the conversion table of comparisons of proportion, converse methanol aqueous solution concentration corresponding to proportion ρ.Certainly, this novel concentration monitoring device also can be applied in and adopt other to have the fuel cell of the liquid fuel of different specific weight except can be applicable to methanol aqueous solution simultaneously.
In the design optimization of this novel concentration monitoring device, selecting of r value can be by giving a particular liquid fuel proportion ρ, and via following calculating formula:
[ F (θ, ρ)/ θ]=0; And obtain this r value, wherein symbol represents partial differential.
Fig. 3 is the graph of a relation of the anglec of rotation (θ) of a liquid fuel proportion (ρ) of a preferred embodiment of novel concentration monitoring device and rotating mechanism.All master data of this preferred embodiment is: M=0.1 (g); R=2.83; L=13.8 (mm); V=1 (cm
3).R value wherein is under liquid fuel proportion (ρ) is 0.96 condition, via calculating formula [ F (and θ, ρ)/ θ]=0 obtain.With reference to shown in Figure 3, can easily find out the pairing liquid fuel proportion of the specific anglec of rotation (θ) (ρ).When the ρ value by 0.1 when 1 increases, θ diminishes, meaning rotating mechanism (14) can be rotated.And leveled off to 0.96 o'clock at ρ, the state of rotating mechanism (14) is as shown in Fig. 1 C, this moment θ
1=165 °.Yet when ρ=0.96, rotating mechanism (14) can carry out the rotations significantly of nearly 180 degree, the state of last rotating mechanism (14) as shown in Figure 4, this moment θ
2=345 °.Because θ
1With θ
2Between be the gap of a wide-angle, thereby can allow observer or observation device discover the variation of rotating mechanism (14) easily.Therefore, can whether change its sense of rotation originally via observing rotating mechanism (14), and the concentration of knowing liquid fuel (12) has been changed to a specific concentrations, is example with the embodiment of Fig. 3, and this specific concentrations is to be 0.96 liquid fuel concentration corresponding to liquid fuel proportion (ρ).
At last, this novel characteristics and effect of conclusion is as follows:
This novel concentration monitoring device use have equal volume, unsteady object (140), (142), (144) that quality becomes Geometric Sequence, and those unsteady objects are all identical with the distance of rotation center (145), thereby this novel concentration monitoring device have cheap for manufacturing cost, and a large amount of easily advantage of making.
2. this novel concentration monitoring device has splendid reaction sensitivity except the concentration amounts measuring tool for liquid fuel (12), can bring outside the great convenience of concentration sensing operation of liquid fuel, whether the concentration that also can monitor liquid fuel (12) at any time has been changed to a specific concentrations, thereby this novel concentration monitoring device can be used as a kind of concentration switch of detecting the specific concentrations of liquid fuel.
Though this is novel with specific embodiment openly as above; right its disclosed specific embodiment is not novel in order to limit this; any personnel that are familiar with this technology; in not breaking away from these novel spirit and scope; when being used for a variety of modifications and variations, its change of doing all belongs to the category that this novel claim is protected with retouching.
Claims (10)
1. a concentration monitoring device in order to detect the concentration of the liquid fuel in the container, is characterized in that, this concentration monitoring device comprises: a rotating mechanism, be positioned at this liquid fuel liquid level down and have a rotation center, this rotating mechanism comprises:
One first unsteady object, its proportion is to be not more than this liquid fuel proportion, and has a volume V value and a mass M value, this first barycenter and the distance of this rotation center on X-Y plane of floating object is L;
One second unsteady object, link this first unsteady object, its proportion is to be not more than this liquid fuel proportion, and have this a volume V value and a quality rM value, this second barycenter and the distance of this rotation center on X-Y plane of floating object is L, and this second barycenter, this rotation center and this first barycenter formed angle on X-Y plane that floats object that floats object is 120 °, and wherein the r value is one greater than 0 constant; And
One the 3rd unsteady object links this first unsteady object and this second unsteady object, and its proportion is to be not more than this liquid fuel proportion, and has this a volume V value and a quality r
2The M value, the 3rd barycenter and the distance of this rotation center on X-Y plane of floating object is L, and the 3rd barycenter, this rotation center and this second barycenter formed angle on X-Y plane that floats object that floats object is 120 °;
Can whether change its sense of rotation originally via observing this rotating mechanism by this, and know that the concentration of this liquid fuel has been changed to a specific concentrations.
2. concentration monitoring device as claimed in claim 1, it is characterized in that, this rotating mechanism can rotate an angle θ on X-Y plane, and it is according to a torque equilibrium equation formula F (θ, ρ)=(M-ρ V) Lcos θ+(rM-ρ V) Lcos (θ+120 °)+(r
2M-ρ V) Lcos (θ+240 °)=0, so that this rotating mechanism can be issued to stationary state at the liquid level of this liquid fuel, and ρ is a proportion of representing this liquid fuel.
3. concentration monitoring device as claimed in claim 2 is characterized in that, this r value be by the calculating formula with a known ρ value [ F (and θ, ρ)/ θ]=0 and obtain, the symbol in this discriminant represents partial differential.
4. concentration monitoring device as claimed in claim 1 is characterized in that, this unsteady object is a spheroid.
5. concentration monitoring device as claimed in claim 1 is characterized in that, this container is a fuel feeding channel, in order to supply with the required fuel of a fuel cell.
6. concentration monitoring device as claimed in claim 1 is characterized in that this liquid fuel is a methanol aqueous solution.
7. concentration monitoring device as claimed in claim 6 is characterized in that, this unsteady object is a resistant material.
8. concentration monitoring device as claimed in claim 5 is characterized in that, this fuel feeding channel further comprises one first inlet, is in order to inject fuel to this fuel feeding channel.
9. concentration monitoring device as claimed in claim 8 is characterized in that, this fuel feeding channel further comprises one second inlet, is in order to inject aqueous solution to this fuel feeding channel.
10. concentration monitoring device as claimed in claim 9 is characterized in that, this fuel feeding channel further comprises an outlet, in order to export the inlet of its fuel to a runner plate of this fuel cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520145280 CN2893693Y (en) | 2005-12-22 | 2005-12-22 | Density detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520145280 CN2893693Y (en) | 2005-12-22 | 2005-12-22 | Density detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2893693Y true CN2893693Y (en) | 2007-04-25 |
Family
ID=38061855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520145280 Expired - Fee Related CN2893693Y (en) | 2005-12-22 | 2005-12-22 | Density detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2893693Y (en) |
-
2005
- 2005-12-22 CN CN 200520145280 patent/CN2893693Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070425 Termination date: 20101222 |