CN110514701A - Concentration detection apparatus, concentration measurement and control device and solar water heater - Google Patents
Concentration detection apparatus, concentration measurement and control device and solar water heater Download PDFInfo
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- CN110514701A CN110514701A CN201810494054.6A CN201810494054A CN110514701A CN 110514701 A CN110514701 A CN 110514701A CN 201810494054 A CN201810494054 A CN 201810494054A CN 110514701 A CN110514701 A CN 110514701A
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- solar water
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- transferring medium
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 170
- 238000001514 detection method Methods 0.000 title claims abstract description 76
- 238000005259 measurement Methods 0.000 title claims abstract description 10
- 230000002528 anti-freeze Effects 0.000 claims abstract description 72
- 238000004364 calculation method Methods 0.000 claims abstract description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 23
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 9
- 239000008399 tap water Substances 0.000 claims description 9
- 235000020679 tap water Nutrition 0.000 claims description 9
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 7
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 235000011187 glycerol Nutrition 0.000 claims description 3
- 125000003827 glycol group Chemical group 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 230000005611 electricity Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- AEDZKIACDBYJLQ-UHFFFAOYSA-N ethane-1,2-diol;hydrate Chemical compound O.OCCO AEDZKIACDBYJLQ-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000007914 freezing tolerance Effects 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/70—Preventing freezing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention discloses a kind of concentration detection apparatus, concentration measurement and control device and solar water heater.Concentration of the afore mentioned concentration detection device for the antifreeze in the heat transferring medium in on-line checking solar water heater, the concentration detection apparatus includes: capacitance detector, suitable for being immersed in the heat transferring medium in solar water heater, for detecting the capacitance C in the heat transferring medium11；Dielectric constant computing unit, according to the capacitance C detected11Calculate the relative dielectric constant ε of the heat transferring medium in solar water heaterr；Temperature sensor is arranged in the heat transferring medium in solar water heater, for detecting the temperature of the heat transferring medium in the solar water heater；With concentration calculation unit, according to calculated relative dielectric constant εrWith the concentration of the antifreeze in the temperature computation heat transferring medium that detects.Therefore, in the present invention, the concentration of the antifreeze in heat transferring medium can be monitored online, exceed preset range to prevent the concentration of the antifreeze in heat transferring medium.
Description
Technical field
The present invention relates to a kind of for detecting the concentration of the concentration of the antifreeze in the heat transferring medium in solar water heater
Detection device and concentration measurement and control device and solar water heater including the concentration detection apparatus.
Background technique
For the solar water heater with heat-exchanger rig, the heat transferring medium in heat-exchanger rig usually all has stronger anti-
Jelly ability, to prevent the heat transferring medium in heat-exchanger rig from frost solidification occur in winter, therefore, this heat transferring medium is usually claimed
For anti frozen liquid, common anti frozen liquid is glycol water or aqueous solution of propylene glycol.It is freeze proof in anti frozen liquid in normal use
The concentration of agent (ethylene glycol or propylene glycol) should be within zone of reasonableness, for example, within the scope of 30V%~60V%.If
The freezing tolerance of lower limit value lower than zone of reasonableness or the upper limit value higher than zone of reasonableness, anti frozen liquid will decline, it is easy to go out
Now frost solidification.In use, it due to leakage, volatilizees, the loss such as aging causes the variation of freeze proof liquid measure and the change of concentration
Change.If adding or replacing anti frozen liquid not in time, it is possible to cause the concentration of the antifreeze in anti frozen liquid beyond zone of reasonableness, this meeting
Anti frozen liquid is caused to be easy occur frost solidification at low temperature, the pipeline so as to cause heat-exchanger rig is blocked or explosion.
Occurs the problem in order to prevent, in the prior art, it is generally required that be sampled analysis to anti frozen liquid, and according to taking
Sample result adds new anti frozen liquid or reconciles concentration.Meanwhile when solar water heater is initially installed, need to confirm anti frozen liquid
Concentration.Since solar water heater is mounted on roof, need manually to sample up, daily maintenance is inconvenient.
Summary of the invention
The purpose of the present invention aims to solve the problem that at least one aspect of the above-mentioned problems in the prior art and defect.
According to an aspect of the present invention, a kind of concentration detection apparatus is provided, in on-line checking solar water heater
Heat transferring medium in antifreeze concentration, the concentration detection apparatus includes: capacitance detector, suitable for being immersed in solar heat
In heat transferring medium in hydrophone, for detecting the capacitance C in the heat transferring medium11；Dielectric constant computing unit, according to institute
State the capacitance C that capacitance detector detects11Calculate the relative dielectric constant ε of the heat transferring medium in the solar water heaterr；
Temperature sensor is arranged in the heat transferring medium in the solar water heater, for detecting in the solar water heater
The temperature of heat transferring medium；With concentration calculation unit, according to the calculated relative dielectric constant ε of the dielectric constant computing unitr
The concentration of antifreeze in heat transferring medium described in the temperature computation detected with the temperature sensor.
The embodiment of an exemplary according to the present invention, the opposite dielectric of the heat transferring medium in the solar water heater
Constant εrIt is calculated according to following formula (1):
Wherein
C10The capacitance detected when for the capacitance detector (100) in a vacuum.
The embodiment of another exemplary according to the present invention, it is freeze proof in the heat transferring medium in the solar water heater
The concentration C of agent is calculated according to following formula (2):
εr=k1C2+k2C+k3(2),
Wherein, k1、k2、k3It is three coefficients relevant to the temperature of heat transferring medium, when the temperature of heat transferring medium determines,
k1、k2、k3It is three constants.
The embodiment of another exemplary according to the present invention, the concentration detection apparatus further includes display unit, described
Display unit and the concentration calculation unit communication, for showing calculated concentration.
The embodiment of another exemplary according to the present invention, the capacitance detector include: a pair of of parallel-plate electrode, are fitted
In the heat transferring medium being immersed in the solar water heater, including first electrode plate and second electrode plate parallel to each other；
And capacitive detection circuit, it is electrically connected with the pair of parallel-plate electrode, the electricity being adapted to detect between the pair of parallel-plate electrode
Capacitance.
The embodiment of another exemplary according to the present invention, the capacitance detector further include a shell, the electricity
Hold detection circuit to be encapsulated in the shell, the pair of parallel-plate electrode is located at the outside of the shell.
The embodiment of another exemplary according to the present invention, the capacitance detector include: a pair of of tubular electrode, are suitable for
It is immersed in the heat transferring medium in the solar water heater, including external tubular electrode and is concentrically disposed at external tubular electricity
Inside cylindrical electrode in extremely；And capacitive detection circuit, it is electrically connected with the pair of tubular electrode, is adapted to detect for the pair of cylinder
Capacitance between shape electrode.
The embodiment of another exemplary according to the present invention, the capacitance detector further include a shell, the electricity
Hold detection circuit to be encapsulated in the shell, the pair of tubular electrode is located at the outside of the shell.
The embodiment of another exemplary according to the present invention, the temperature sensor are encapsulated in the capacitance detector
Shell in.
According to another aspect of the present invention, a kind of concentration measurement and control device is provided, comprising: concentration detection apparatus is used for
Line detects the concentration of the antifreeze in the heat transferring medium in solar water heater；Concentration judging unit, for judge to detect
Whether concentration is within preset range.
According to another aspect of the present invention, a kind of solar water heater is provided, comprising: water tank, for accommodating water；With
Heat-exchanger rig, including the heat exchanger that the heat collector of outside is arranged in and is arranged in the water tank, the outlet of the heat collector
It is connected by pipeline with the entrance of the heat exchanger, the outlet of the heat exchanger passes through the entrance phase of pipeline and the heat collector
Even, to constitute a closed circulation loop, heat transferring medium, the solar water heater are filled in the circulation loop
It further include concentration detection apparatus, the concentration detection apparatus is for anti-in the heat transferring medium in on-line checking solar water heater
Freeze the concentration of agent.
The embodiment of an exemplary according to the present invention, the heat transferring medium in the solar water heater are ethylene glycol water
Solution, aqueous solution of propylene glycol or glycerin solution.
The embodiment of another exemplary according to the present invention, the solar water heater further include: concentration judging unit,
For judging the concentration detected whether within preset range；With concentration alarm unit, it is used in the concentration judging unit
It is sounded an alarm when determining the concentration detected beyond the preset range.
The embodiment of another exemplary according to the present invention, when the heat transferring medium in the solar water heater is second two
When alcohol solution, the reasonable concentration of the heat transferring medium in the solar water heater is within 30V%~60V%.
The embodiment of another exemplary according to the present invention, the capacitance detector and temperature of the concentration detection apparatus pass
Sensor is encapsulated in the pipeline of the circulation loop for cycle heat exchange medium of the solar water heater.
The embodiment of another exemplary according to the present invention, the heat collector are flat plate collector, the heat exchanger
To coil tube type heat exchangers.
The embodiment of another exemplary according to the present invention, the solar water heater further includes pump, for pumping
Heat transferring medium is stated, so that the heat transferring medium circulates in the circulation loop.
The embodiment of another exemplary according to the present invention, the water tank have inlet and outlet, it is described into
The mouth of a river is located at the lower part of the water tank, and the water outlet is located at the top of the water tank.
The embodiment of another exemplary according to the present invention, the solar water heater further include antifreeze supplement dress
It sets, the antifreeze supplementary device is lower than scheduled concentration suitable for the concentration of the antifreeze detected in the concentration detection apparatus
Antifreeze automatically is supplemented into the heat-exchanger rig when lower limit value, so that the concentration of the antifreeze in the heat-exchanger rig is restored
To within concentration range reasonable.
The embodiment of another exemplary according to the present invention, the antifreeze supplementary device includes: container, is stored with anti-
Freeze agent；Connecting line, by the reservoir to the heat-exchanger rig；First electrically-controlled valve is mounted on the connecting line, is used
In opening or closing the connecting line；And controller, suitable for the dense of the antifreeze that is detected according to the concentration detection apparatus
Degree controls the opening and closing of first electrically-controlled valve.When the concentration for the antifreeze that the concentration detection apparatus detects is lower than pre-
When fixed concentration limit value, the controller controls first electrically-controlled valve and opens, and controls first electrically-controlled valve to described
The antifreeze of predetermined amount is supplemented in heat-exchanger rig.
The embodiment of another exemplary according to the present invention, the controller is by controlling beating for first electrically-controlled valve
ETAD expected time of arrival and departure controls the amount of the antifreeze supplemented into the heat-exchanger rig.
The embodiment of another exemplary according to the present invention, the solar water heater further includes water replanishing device, described
Water replanishing device is suitable for automatic when the concentration for the antifreeze that the concentration detection apparatus detects is higher than scheduled upper limit of concentration value
Ground supplements tap water into the heat-exchanger rig, so that the concentration of the antifreeze in the heat-exchanger rig is restored to reasonable concentration model
Within enclosing.
The embodiment of another exemplary according to the present invention, the water replanishing device include: water pipe, by the heat exchange
Device is connected to water supply；Second electrically-controlled valve is mounted on the water pipe, is used to open or closes the water supply pipe
Road；And controller, the concentration of the antifreeze suitable for being detected according to the concentration detection apparatus control second electrically-controlled valve
It opens and closes；It is described when the concentration for the antifreeze that the concentration detection apparatus detects is higher than scheduled upper limit of concentration value
Controller controls second electrically-controlled valve and opens, and controls second electrically-controlled valve and supplement predetermined amount into the heat-exchanger rig
Tap water.
The embodiment of another exemplary according to the present invention, the controller is by controlling beating for second electrically-controlled valve
ETAD expected time of arrival and departure controls the amount of the tap water supplemented into the heat-exchanger rig.
In the embodiment for stating each exemplary before this invention, concentration detection apparatus is provided on solar water heater,
So as to the concentration of the antifreeze in the heat transferring medium in on-line checking solar water heater, so as to which heat exchange is monitored online
The concentration of antifreeze in medium exceeds preset range to prevent the concentration of the antifreeze in heat transferring medium.
By the description made for the present invention of below with reference to attached drawing, other objects and advantages of the present invention will be aobvious and easy
See, and can help that complete understanding of the invention will be obtained.
Detailed description of the invention
Fig. 1 shows the schematic diagram of the solar water heater of the embodiment of an exemplary according to the present invention；
Fig. 2 shows the schematic diagram of the capacitance detector of first embodiment according to the present invention；
Fig. 3 shows that a pair of of parallel-plate electrode of capacitance detector shown in Fig. 2 is immersed in the heat exchange in solar water heater
Schematic diagram in medium；
Fig. 4 shows the schematic diagram of the capacitance detector of second embodiment according to the present invention；
Fig. 5 shows that the heat exchange that a pair of of tubular electrode of capacitance detector shown in Fig. 4 is immersed in solar water heater is situated between
Schematic diagram in matter；
Fig. 6 is shown between the concentration of antifreeze and the relative dielectric constant of heat transferring medium and temperature in heat transferring medium
Relationship.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.Illustrating
In book, the same or similar drawing reference numeral indicates the same or similar component.Following reference attached drawings are to embodiment of the present invention
Illustrate to be intended to explain present general inventive concept of the invention, and is not construed as to a kind of limitation of the invention.
In addition, in the following detailed description, to elaborate many concrete details to provide to present disclosure convenient for explaining
The comprehensive understanding of embodiment.It should be apparent, however, that one or more embodiments without these specific details can also be with
It is carried out.In other cases, well known construction and device is diagrammatically embodied to simplify attached drawing.
General technical design according to the present invention, provides a kind of concentration detection apparatus, is used for on-line checking solar energy
The concentration of the antifreeze in heat transferring medium in water heater, the concentration detection apparatus includes: capacitance detector, suitable for being immersed in
In heat transferring medium in solar water heater, for detecting the capacitance C in the heat transferring medium11；Dielectric constant calculates single
Member, the capacitance C detected according to the capacitance detector11Calculate opposite Jie of the heat transferring medium in the solar water heater
Electric constant εr；Temperature sensor is arranged in the heat transferring medium in the solar water heater, for detecting the solar heat
The temperature of heat transferring medium in hydrophone；With concentration calculation unit, it is situated between relatively according to the dielectric constant computing unit is calculated
Electric constant εrThe concentration of antifreeze in heat transferring medium described in the temperature computation detected with the temperature sensor.
Another general technical design according to the present invention, provides a kind of concentration measurement and control device, comprising: Concentration Testing dress
It sets, the concentration for the antifreeze in the heat transferring medium in on-line checking solar water heater；Concentration judging unit, for judging
Whether the concentration detected is within preset range；With concentration alarm unit, it is used to determine to detect in the concentration judging unit
To concentration exceed the preset range when sound an alarm.
Another general technical design according to the present invention, provides a kind of solar water heater, comprising: water tank is used for
Accommodate water；And heat-exchanger rig, including the heat exchanger that the heat collector of outside is arranged in and is arranged in the water tank, the thermal-arrest
The outlet of device is connected by pipeline with the entrance of the heat exchanger, and the outlet of the heat exchanger passes through pipeline and the heat collector
Entrance is connected, to constitute a closed circulation loop, heat transferring medium, the solar energy are filled in the circulation loop
Water heater further includes concentration detection apparatus, and the concentration detection apparatus is for the heat transferring medium in on-line checking solar water heater
In antifreeze concentration.
Fig. 1 shows the schematic diagram of the solar water heater of the embodiment of an exemplary according to the present invention.
As shown in Figure 1, in the illustrated embodiment, which specifically includes that water tank 200 and heat exchange dress
It sets.Water tank 200 is for accommodating water.Heat-exchanger rig includes that external heat collector 110 is arranged in and is arranged in water tank 200
Heat exchanger 120.The outlet of heat collector 110 is connected by pipeline with the entrance of heat exchanger 120, and the outlet of heat exchanger 120 passes through pipe
Road is connected with the entrance of heat collector 110, to constitute a closed circulation loop, is situated between in circulation loop filled with heat exchange
Matter.The heat transferring medium heated by heat collector 110 flows into heat exchanger 120, and passes through the water in heat exchanger 120 and water tank 200
Heat exchange is carried out, to heat the water in water tank 200.Heat transferring medium in water tank 200 water carry out heat exchange after,
It again flows into heat collector 110 and is heated by heat collector 110.
Fig. 2 shows the schematic diagram of the capacitance detector 10 of first embodiment according to the present invention；
Fig. 3 shows that a pair of of parallel-plate electrode 11,12 of capacitance detector 10 shown in Fig. 2 is immersed in solar water heater
Heat transferring medium 101 in schematic diagram.
As shown in Figure 1 to Figure 3, in the illustrated embodiment, which further includes concentration detection apparatus, this is dense
Spend concentration of the detection device for the antifreeze in the heat transferring medium 101 in on-line checking solar water heater.
As shown in Figure 1 to Figure 3, in the illustrated embodiment, the concentration detection apparatus specifically include that capacitance detector 10,
Dielectric constant computing unit (not shown), temperature sensor (not shown) and concentration calculation unit.
As shown in Figure 1 to Figure 3, in the illustrated embodiment, capacitance detector 10 is suitable for being immersed in solar water heater
Heat transferring medium 101 in, for detecting the capacitance C in heat transferring medium 10111.Dielectric constant computing unit is examined according to capacitor
Survey the capacitance C that device 10 detects11Calculate the relative dielectric constant ε of the heat transferring medium 101 in solar water heaterr.Temperature passes
Sensor is arranged in the heat transferring medium 101 in solar water heater, for detecting the heat transferring medium 101 in solar water heater
Temperature.Concentration calculation unit is according to the calculated relative dielectric constant ε of dielectric constant computing unitrIt is detected with temperature sensor
Temperature computation heat transferring medium 101 in antifreeze concentration.
In the embodiment of an example of the present invention, the opposite dielectric of the heat transferring medium 101 in solar water heater
Constant εrIt can be calculated according to following formula (1):
Wherein
C10The capacitance detected when for capacitance detector 100 in a vacuum.
In the embodiment of an example of the present invention, afore mentioned concentration detection device further includes display unit, the display
Unit and concentration calculation unit communication, for showing calculated concentration.
As shown in Figures 2 and 3, in the illustrated embodiment, which includes a pair of of parallel-plate electrode 11,12
With capacitive detection circuit (not shown).A pair of of parallel-plate electrode 11,12 is suitable for the heat transferring medium being immersed in solar water heater
In 101, including first electrode plate 11 and second electrode plate 1 parallel to each other.Capacitive detection circuit and a pair of of parallel-plate electrode 11,
12 electrical connections, the capacitance C being adapted to detect between a pair of of parallel-plate electrode 11,1211。
As shown in Figures 2 and 3, in the illustrated embodiment, capacitance detector 10 further includes a shell 13, aforementioned capacitor
Detection circuit is encapsulated in shell 13, and a pair of of parallel-plate electrode 11,12 is located at the outside of shell 13.Therefore, work as capacitance detecting
When device 10 is immersed in the heat transferring medium 101 in solar water heater, as shown in figure 3, between a pair of of parallel-plate electrode 11,12
Full of heat transferring medium 101.
Fig. 4 shows the schematic diagram of the capacitance detector 10 ' of second embodiment according to the present invention；
Fig. 5 shows that a pair of of tubular electrode 11 ', 12 ' of capacitance detector 10 ' shown in Fig. 4 is immersed in solar water heater
Schematic diagram in interior heat transferring medium 101.
As shown in Figure 4 and Figure 5, in the illustrated embodiment, the capacitance detector 10 ' include a pair of of tubular electrode 11 ',
12 ' and capacitive detection circuit (not shown).The heat exchange that a pair of of tubular electrode 11 ', 12 ' is suitable for being immersed in solar water heater is situated between
In matter 101, including the external inside cylindrical electrode 12 ' tubular electrode 11 ' and be concentrically disposed in external tubular electrode 11 '.
Capacitive detection circuit is electrically connected with a pair of of tubular electrode 11 ', 12 ', the capacitor being adapted to detect between a pair of of tubular electrode 11 ', 12 '
Value C11。
As shown in Figure 4 and Figure 5, in the illustrated embodiment, capacitance detector 10 ' further includes a shell 13 ', aforementioned electricity
Hold detection circuit to be encapsulated in shell 13 ', a pair of of tubular electrode 11 ', 12 ' is located at the outside of shell 13 '.Therefore, work as capacitor
When detector 10 ' is immersed in the heat transferring medium 101 in solar water heater, as shown in figure 5, a pair of of tubular electrode 11 ',
Heat transferring medium 101 is full of between 12 '.
In the embodiment of an example of the present invention, aforementioned temperature sensor can directly be encapsulated in capacitance detecting
In the shell 13 of device 10.But the present invention is not limited to the embodiment of diagram, aforementioned temperature sensor can also be separately provided
In heat transferring medium 101 in solar water heater.
Fig. 6 is shown between the concentration of antifreeze and the relative dielectric constant of heat transferring medium and temperature in heat transferring medium
Relationship.
As shown in fig. 6, in the illustrated embodiment, the heat transferring medium in solar water heater is glycol water, this
When, the reasonable concentration of the heat transferring medium in solar water heater is within 30V%~60V%.That is, changing in solar water heater
The concentration of thermal medium should be within the scope of 30V%~60V%, if exceeding the range, for example, in solar water heater
For the concentration of heat transferring medium lower than 30V% or when being higher than 60V%, the concentration measurement and control device being mounted on solar water heater can be timely
Alarm.
As shown in fig. 6, in the illustrated embodiment, when one timing of temperature of the heat transferring medium in solar water heater, second
There are a quadratic functions between the relative dielectric constant of two alcohol solutions (heat transferring medium) and the concentration of ethylene glycol (antifreeze)
Relationship.Relationship between the two can indicate that (C indicates the concentration of the antifreeze in heat transferring medium, ε with following formula (2)rTable
Show the relative dielectric constant of heat transferring medium):
εr=k1C2+k2C+k3(2),
Wherein, k1、k2、k3It is three coefficients relevant to the temperature of heat transferring medium, when the temperature of heat transferring medium determines,
k1、k2、k3It is three constants.
In relation curve shown in Fig. 6, it can be seen that with the increase of the concentration of ethylene glycol, the phase of glycol water
To permittivity εrAlso correspondingly rise.Therefore, as the relative dielectric constant ε for detecting glycol waterrIt is water-soluble with ethylene glycol
When the temperature of liquid, so that it may calculate corresponding glycol concentration C according to the curve that Fig. 6 is shown.
The present invention is not limited in previous embodiment, and the heat transferring medium in solar water heater is in addition to that can be ethylene glycol water
Solution can also be other suitable anti frozen liquids, for example, aqueous solution of propylene glycol or glycerin solution.
In the embodiment of an example of the present invention, solar water heater further include: concentration judging unit, for sentencing
Whether the disconnected concentration detected is within preset range (aforementioned zone of reasonableness)；With concentration alarm unit, it is used to judge in concentration
Unit sounds an alarm when determining the concentration detected beyond preset range.
In the embodiment of an example of the present invention, the capacitance detector and temperature sensor quilt of concentration detection apparatus
It is encapsulated in the pipeline of the circulation loop for cycle heat exchange medium of solar water heater.
In the embodiment of an example of the present invention, as shown in Figure 1, heat collector 110 is flat plate collector, heat exchange
Device 120 is coiling tube type heat exchangers.
In the embodiment of an example of the present invention, as shown in Figure 1, solar water heater further includes pump 130, it is used for
Heat transferring medium is pumped, so that heat transferring medium circulates in circulation loop.
In the embodiment of an example of the present invention, as shown in Figure 1, water tank 200 has water inlet 210 and water outlet
Mouth 220, water inlet 210 is located at the lower part of water tank 200, and water outlet 220 is located at the top of water tank 200.
As shown in Figure 1, in the illustrated embodiment, solar water heater further include antifreeze supplementary device 300,310,
320, antifreeze supplementary device 300,310,320 is lower than scheduled suitable for the concentration of the antifreeze detected in concentration detection apparatus
Antifreeze is automatically supplemented into heat-exchanger rig when concentration limit value, so that the concentration of the antifreeze in heat-exchanger rig is restored to conjunction
It manages within concentration range.
As shown in Figure 1, in the illustrated embodiment, antifreeze supplementary device 300,310,320 specifically includes that container 300,
It is stored with antifreeze；Container 300 is connected to heat-exchanger rig by connecting line 310；First electrically-controlled valve 320, is mounted on connecting line
On 310, connecting line 310 is used to open or closed；And controller, suitable for the antifreeze that is detected according to concentration detection apparatus
Concentration controls the opening and closing of the first electrically-controlled valve 320.
As shown in Figure 1, in the illustrated embodiment, when the concentration for the antifreeze that concentration detection apparatus detects is lower than predetermined
Concentration limit value when, controller control the first electrically-controlled valve 320 open, and control the first electrically-controlled valve 320 mended into heat-exchanger rig
Fill the antifreeze of predetermined amount.
As shown in Figure 1, in the illustrated embodiment, controller is controlled by controlling the opening time of the first electrically-controlled valve 320
Make the amount of the antifreeze supplemented into heat-exchanger rig.
As shown in Figure 1, in the illustrated embodiment, solar water heater further includes water replanishing device 410,420, water replanishing device
410,420 are suitable for when the concentration for the antifreeze that concentration detection apparatus detects is higher than scheduled upper limit of concentration value automatically to changing
Tap water is supplemented in thermal, so that the concentration of the antifreeze in heat-exchanger rig is restored within concentration range reasonable.
As shown in Figure 1, in the illustrated embodiment, water replanishing device 410,420 specifically includes that water pipe 410, will exchange heat
Device is connected to water supply；Second electrically-controlled valve 420, is mounted on water pipe 410, is used to open or closes water pipe
410；And controller, the opening of the second electrically-controlled valve 420 is controlled suitable for the concentration of the antifreeze detected according to concentration detection apparatus
And closing.
As shown in Figure 1, in the illustrated embodiment, making a reservation for when the concentration for the antifreeze that concentration detection apparatus detects is higher than
Upper limit of concentration value when, controller control the second electrically-controlled valve 420 open, and control the second electrically-controlled valve 420 mended into heat-exchanger rig
Fill the tap water of predetermined amount.
As shown in Figure 1, in the illustrated embodiment, controller is controlled by controlling the opening time of the second electrically-controlled valve 420
Make the amount of the tap water supplemented into heat-exchanger rig.
In the embodiment of another exemplary of the invention, a kind of concentration measurement and control device, concentration measurement and control dress are also disclosed
Setting includes: concentration detection apparatus, the concentration for the antifreeze in the heat transferring medium 101 in on-line checking solar water heater；
Concentration judging unit, for judging the concentration detected whether within preset range；With concentration alarm unit, it is used in concentration
Judging unit sounds an alarm when determining the concentration detected beyond preset range.
It will be understood to those skilled in the art that embodiment described above is all exemplary, and this field
Technical staff can make improvements, the rushing in terms of not recurring structure or principle of structure described in various embodiments
It can be freely combined in the case where prominent.
Although in conjunction with attached drawing, the present invention is described, and embodiment disclosed in attached drawing is intended to preferred to the present invention
Embodiment illustrates, and should not be understood as to a kind of limitation of the invention.
Although some embodiments of this present general inventive concept have been shown and have illustrated, those of ordinary skill in the art will be managed
Solution can make a change these embodiments in the case where the principle and spirit without departing substantially from this present general inventive concept, of the invention
Range is limited with claim and their equivalent.
It should be noted that word " comprising " is not excluded for other element or steps, word "a" or "an" is not excluded for multiple.Separately
Outside, the range that any element label of claim should not be construed as limiting the invention.
Claims (24)
1. a kind of concentration detection apparatus, for the antifreeze in the heat transferring medium (101) in on-line checking solar water heater
Concentration, the concentration detection apparatus include:
Capacitance detector (10), suitable for being changed for detecting described in the heat transferring medium (101) that is immersed in solar water heater
Capacitance C in thermal medium (101)11；
Dielectric constant computing unit, the capacitance C detected according to the capacitance detector (10)11Calculate the solar water
The relative dielectric constant ε of heat transferring medium (101) in devicer；
Temperature sensor is arranged in the heat transferring medium in the solar water heater (101), for detecting the solar heat
The temperature of heat transferring medium (101) in hydrophone；With
Concentration calculation unit, according to the calculated relative dielectric constant ε of the dielectric constant computing unitrWith the temperature sensing
The concentration of antifreeze in heat transferring medium described in the temperature computation that device detects (101).
2. concentration detection apparatus according to claim 1, it is characterised in that:
The relative dielectric constant ε of heat transferring medium (101) in the solar water heaterrIt is calculated according to following formula (1):
Wherein
C10The capacitance detected when for the capacitance detector (100) in a vacuum.
3. concentration detection apparatus according to claim 1, it is characterised in that:
The concentration C of the antifreeze in heat transferring medium (101) in the solar water heater is calculated according to following formula (2):
εr=k1C2+k2C+k3(2),
Wherein, k1、k2、k3It is three coefficients relevant to the temperature of heat transferring medium, when the temperature of heat transferring medium determines, k1、k2、
k3It is three constants.
4. concentration detection apparatus according to claim 1, it is characterised in that:
The concentration detection apparatus further includes display unit, the display unit and the concentration calculation unit communication, for showing
Show calculated concentration.
5. concentration detection apparatus according to claim 1, which is characterized in that the capacitance detector (10) includes:
A pair of of parallel-plate electrode (11,12), suitable in the heat transferring medium (101) that is immersed in the solar water heater, including
First electrode plate (11) and second electrode plate (12) parallel to each other；With
Capacitive detection circuit is electrically connected with the pair of parallel-plate electrode (11,12), is adapted to detect for the pair of parallel-plate electrode
Capacitance between (11,12).
6. concentration detection apparatus according to claim 5, it is characterised in that:
The capacitance detector (10) further includes a shell (13), and the capacitive detection circuit is encapsulated in the shell (13)
In, the pair of parallel-plate electrode (11,12) is located at the outside of the shell (13).
7. concentration detection apparatus according to claim 1, which is characterized in that the capacitance detector (10 ') includes:
A pair of of tubular electrode (11 ', 12 '), suitable in the heat transferring medium (101) that is immersed in the solar water heater, including
External tubular electrode (11 ') and the inside cylindrical electrode (12 ') being concentrically disposed in external tubular electrode (11 ')；With
Capacitive detection circuit is electrically connected with the pair of tubular electrode (11 ', 12 '), is adapted to detect for the pair of tubular electrode
Capacitance between (11 ', 12 ').
8. concentration detection apparatus according to claim 7, it is characterised in that:
The capacitance detector (10 ') further includes a shell (13 '), and the capacitive detection circuit is encapsulated in the shell
In (13 '), the pair of tubular electrode (11 ', 12 ') is located at the outside of the shell (13 ').
9. the concentration detection apparatus according to claim 5 or 7, it is characterised in that: the temperature sensor is encapsulated in institute
It states in the shell (13) of capacitance detector (10).
10. a kind of concentration measurement and control device characterized by comprising
Concentration detection apparatus, the concentration for the antifreeze in the heat transferring medium (101) in on-line checking solar water heater；
Concentration judging unit, for judging the concentration detected whether within preset range；With
Concentration alarm unit, for the sending when the concentration judging unit determines the concentration detected beyond the preset range
Alarm,
The concentration detection apparatus is concentration detection apparatus of any of claims 1-9.
11. a kind of solar water heater, comprising:
Water tank (200), for accommodating water；With
Heat-exchanger rig, including the heat exchanger of external heat collector (110) and setting in the water tank (200) is arranged in
(120),
The outlet of the heat collector (110) is connected by pipeline with the entrance of the heat exchanger (120), the heat exchanger (120)
Outlet be connected with the entrance of the heat collector (110) by pipeline, so that one closed circulation loop of composition, is followed described
Heat transferring medium is filled in loop back path,
It is characterized by:
The solar water heater further includes concentration detection apparatus, and the concentration detection apparatus is used for on-line checking solar water
The concentration of the antifreeze in heat transferring medium in device,
The concentration detection apparatus is concentration detection apparatus of any of claims 1-9.
12. solar water heater according to claim 11, it is characterised in that:
Heat transferring medium in the solar water heater is glycol water, aqueous solution of propylene glycol or glycerin solution.
13. solar water heater according to claim 12, which is characterized in that the solar water heater further include:
Concentration judging unit, for judging the concentration detected whether within preset range；With
Concentration alarm unit, for the sending when the concentration judging unit determines the concentration detected beyond the preset range
Alarm.
14. solar water heater according to claim 13, it is characterised in that:
When the heat transferring medium in the solar water heater is glycol water, the heat exchange in the solar water heater is situated between
The reasonable concentration of matter is within 30V%~60V%.
15. solar water heater according to claim 11, it is characterised in that:
The capacitance detector and temperature sensor of the concentration detection apparatus be encapsulated in the solar water heater for following
In the pipeline of the circulation loop of ring heat transferring medium.
16. solar water heater according to claim 11, it is characterised in that:
The heat collector (110) is flat plate collector, and the heat exchanger (120) is coiling tube type heat exchangers.
17. solar water heater according to claim 11, it is characterised in that:
The solar water heater further includes pump (130), for pumping the heat transferring medium, so that the heat transferring medium is described
It is circulated in circulation loop.
18. solar water heater according to claim 11, it is characterised in that:
The water tank (200) has water inlet (210) and water outlet (220), and the water inlet (210) is located at the water tank
(200) lower part, the water outlet (220) are located at the top of the water tank (200).
19. solar water heater according to claim 11, it is characterised in that:
The solar water heater further includes antifreeze supplementary device (300,310,320), the antifreeze supplementary device (300,
310,320) it is suitable for automatic when the concentration for the antifreeze that the concentration detection apparatus detects is lower than scheduled concentration limit value
Ground supplements antifreeze into the heat-exchanger rig, so that the concentration of the antifreeze in the heat-exchanger rig is restored to reasonable concentration model
Within enclosing.
20. solar water heater according to claim 19, which is characterized in that the antifreeze supplementary device (300,
310,320) include:
Container (300), is stored with antifreeze；
The container (300) is connected to the heat-exchanger rig by connecting line (310)；
First electrically-controlled valve (320) is mounted on the connecting line (310), is used to open or closes the connecting line
(310)；With
Controller, the concentration suitable for the antifreeze detected according to the concentration detection apparatus control first electrically-controlled valve
(320) opening and closing,
When the concentration for the antifreeze that the concentration detection apparatus detects is lower than scheduled concentration limit value, the controller control
It makes first electrically-controlled valve (320) to open, and controls in the first electrically-controlled valve (320) Xiang Suoshu heat-exchanger rig and supplement predetermined amount
Antifreeze.
21. solar water heater according to claim 20, it is characterised in that:
The controller is supplemented to control into the heat-exchanger rig by controlling the opening time of first electrically-controlled valve (320)
Antifreeze amount.
22. solar water heater according to claim 11, it is characterised in that:
The solar water heater further includes water replanishing device (410,420), and the water replanishing device (410,420) is suitable for described dense
The concentration for the antifreeze that degree detection device detects automatically is mended into the heat-exchanger rig when being higher than scheduled upper limit of concentration value
Tap water is filled, so that the concentration of the antifreeze in the heat-exchanger rig is restored within concentration range reasonable.
23. solar water heater according to claim 22, which is characterized in that the water replanishing device (410,420) includes:
The heat-exchanger rig is connected to water supply by water pipe (410)；
Second electrically-controlled valve (420) is mounted on the water pipe (410), is used to open or closes the water pipe
(410)；With
Controller, the concentration suitable for the antifreeze detected according to the concentration detection apparatus control second electrically-controlled valve
(420) opening and closing,
When the concentration for the antifreeze that the concentration detection apparatus detects is higher than scheduled upper limit of concentration value, the controller control
It makes second electrically-controlled valve (420) to open, and controls in the second electrically-controlled valve (420) Xiang Suoshu heat-exchanger rig and supplement predetermined amount
Tap water.
24. solar water heater according to claim 23, it is characterised in that:
The controller is supplemented to control into the heat-exchanger rig by controlling the opening time of second electrically-controlled valve (420)
Tap water amount.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494054.6A CN110514701A (en) | 2018-05-22 | 2018-05-22 | Concentration detection apparatus, concentration measurement and control device and solar water heater |
| PCT/EP2019/062471 WO2019224067A1 (en) | 2018-05-22 | 2019-05-15 | Concentration detection device, concentration monitor device and solar water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494054.6A CN110514701A (en) | 2018-05-22 | 2018-05-22 | Concentration detection apparatus, concentration measurement and control device and solar water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110514701A true CN110514701A (en) | 2019-11-29 |
Family
ID=66625166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810494054.6A Pending CN110514701A (en) | 2018-05-22 | 2018-05-22 | Concentration detection apparatus, concentration measurement and control device and solar water heater |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110514701A (en) |
| WO (1) | WO2019224067A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946031A (en) * | 2019-12-11 | 2021-06-11 | 泰科电子(上海)有限公司 | Method for measuring concentration of anti-freezing solution, capacitor, measuring device and water heater |
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| WO2019224067A1 (en) | 2019-11-28 |
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