CN109882929A - Liquid-level detecting method, liquid level detection device, air conditioner and computer readable storage medium - Google Patents
Liquid-level detecting method, liquid level detection device, air conditioner and computer readable storage medium Download PDFInfo
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The present invention discloses a kind of liquid-level detecting method, liquid level detection device, air conditioner and computer readable storage medium.The liquid-level detecting method includes the first air pressure of the second air pressure and last detection in the detection bucket for obtain presently described pressure test device detection；The second liquid level in presently described liquid reserve tank is calculated according to first air pressure and the second air pressure, to realize the SEA LEVEL VARIATION in the current liquid reserve tank of real-time detection, and only needs a pressure test device, cost is relatively low, applied widely.
Description
Technical field
The present invention relates to level sensing field, in particular to a kind of liquid-level detecting method, liquid level detection device, air conditioner with
And computer readable storage medium.
Background technique
Level sensing is carried out in the prior art and is mainly the following method: float method, supercritical ultrasonics technology, Multi-point contact type
Method, the detection that liquid level is realized by capacitor and touch switch, the mechanical feedback for realizing liquid level of method with buoyancy；For
The above several method or be exactly that float is easy to block or is exactly that device cost itself is excessively high, there are also be exactly feedback information essence
Exactness is not high, causes induction level and to make certain judgement in time.
It is convenient using law of connected vessels detection level sensing process, and cost can be saved, but this calculation method
Accuracy is only guaranteed in the constant Shi Caineng of ambient air pressure；Actually ambient air pressure is to change whenever and wherever possible
, therefore the accuracy for detecting using law of connected vessels liquid level is not high.
Summary of the invention
The main object of the present invention is to propose a kind of liquid-level detecting method, liquid level detection device, air conditioner and computer
Readable storage medium storing program for executing, it is intended to improve the accuracy of level sensing.
To achieve the above object, a kind of liquid-level detecting method proposed by the present invention, the liquid-level detecting method are used for liquid level
Detection device, the liquid level detection device are used to detect the liquid level in liquid reserve tank, and the liquid level detection device includes detection bucket, institute
The water inlet for stating detection bucket is connected to the liquid reserve tank internal cavity, so that the detection bucket is connected to liquid reserve tank formation
Device, the detection bucket is interior to be equipped with pressure test device；The liquid-level detecting method the following steps are included:
Obtain the second air pressure and last first detected in the detection bucket of presently described pressure test device detection
Air pressure；
The second liquid level in presently described liquid reserve tank is calculated according to first air pressure and the second air pressure.
Further, second liquid level calculated according to first air pressure and the second air pressure in presently described liquid reserve tank
The following steps are included:
Obtain the first liquid level corresponding with first air pressure in the liquid reserve tank of storage；
The variation of the liquid level in the liquid reserve tank is calculated according to first air pressure, second air pressure and the first preset formula
Amount；
Calculate first liquid level and the liquid level variable quantity and value, obtain second liquid level.
Further, the calculate first liquid level and the liquid level variable quantity and value, obtains second liquid level
The step of after further include:
Second air pressure is stored as to the first air pressure of the last detection, second liquid level replacement is stored as
First liquid level；
It is transferred to and executes the second air pressure and upper one in the detection bucket for obtaining presently described pressure test device detection
The step of first air pressure of secondary detection.
Further, the calculate first liquid level and the liquid level variable quantity and value, obtains second liquid level
The step of after further include:
When getting the signal for stopping level sensing, the second liquid level in presently described liquid reserve tank is saved；
When getting the signal of starting level sensing, using the air pressure detected for the first time as the last detection
First air pressure, using second liquid level of preservation as the first liquid level of the last detection.
Further, second liquid level calculated according to first air pressure and the second air pressure in presently described liquid reserve tank
The following steps are included:
Calculate the air pressure difference of first air pressure and second air pressure；
When the air pressure difference is not more than preset pressure changing value, the atmospheric gas pressure of the air pressure difference and storage is calculated
And value, and by the air pressure difference and the atmospheric gas pressure and value update replace with the atmospheric gas pressure of storage；
Second liquid level is calculated according to second air pressure, the atmospheric gas pressure of the storage and the second preset formula.
Further, in water inlet of the liquid level of the water tank lower than the detection bucket, the air pressure detection dress is stored
The air pressure for setting detection is the atmospheric gas pressure of the storage.
Further, liquid level corresponding to the water inlet of the detection bucket is preset reference liquid level, described according to
First air pressure and the second air pressure calculate further comprising the steps of after the second liquid level in presently described liquid reserve tank:
When the absolute value of second liquid level and the preset reference liquid level is less than or equal to the first preset value, institute is reset
State preset reference liquid level；
When the absolute value of second air pressure and the difference of first air pressure is greater than or equal to second preset value,
Current level is saved as into the preset reference liquid level and second liquid level, the first air pressure of detection saves as institute by the last time
State the atmospheric gas pressure of storage.
Further, the second liquid in presently described liquid reserve tank is calculated according to first air pressure and the second air pressure described
Primary acquisition reference level method is at least executed before the step of position.
The present invention also proposes a kind of liquid level detection device, for detecting the liquid level in liquid reserve tank, the liquid level detection device
Include:
Bucket is detected, there is the water inlet being connected to the cavity in the liquid reserve tank, the detection bucket and the liquid storage box-shaped
At linker；
Pressure test device is set in the detection bucket, for detecting air pressure in the detection bucket；
Control module, the control module are electrically connected with the pressure test device；The control module include memory,
Processor and it is stored in the level sensing program that can be run on the memory and on the processor, the level sensing journey
The step of liquid-level detecting method is realized when sequence is executed by the processor.
Further, the detection bucket is in the form of a column, and the water inlet is opened in the detection bucket bottom and/or side.
Further, the detection bucket includes staving and sealing cover closes sealing block at the top of the staving, the air pressure
Detection device is set on the sealing block or on the staving.
Further, the liquid level detection device further includes support frame, and the detection bucket is connect with the crossbeam, and described
Crossbeam is equipped with the wire casing accommodated for the conducting wire of the pressure test device.
Further, the liquid level detection device further includes the human-computer interaction module being electrically connected with the control module；
The human-computer interaction module includes one of push-button unit, remote control unit, cell phone application, voice module or a variety of.
The present invention also proposes a kind of air conditioner, has the liquid level detection device in the air conditioner；
The water inlet line of the liquid level detection device is connect with the heat exchanger, to receive the condensed water of heat exchanger, and/or
The water inlet line of the liquid level detection device is for the water source connection outside the air conditioner.
Further, the air conditioner includes atomizer, and the atomizer is connect with the liquid reserve tank, to the liquid storage
Liquid in case is atomized.
The present invention also proposes a kind of computer readable storage medium, is stored with liquid level on the computer readable storage medium
The step of detecting program, the liquid-level detecting method realized when the level sensing program is executed by the processor.
Second air pressure in the detection bucket of the technical scheme by obtaining presently described pressure test device detection
With the first air pressure of last time detection；The second liquid in presently described liquid reserve tank is calculated according to first air pressure and the second air pressure
Position to realize the SEA LEVEL VARIATION in the current liquid reserve tank of real-time detection, and only needs a pressure test device, at
This is lower, applied widely.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 shows for the structure that the water inlet that liquid level detection device of the present invention detects bucket is opened in the detection bucket staving side
It is intended to；
Fig. 2 shows for the structure that the water inlet that liquid level detection device of the present invention detects bucket is opened in the detection bucket staving bottom
It is intended to；
Fig. 3 is that the liquid reserve tank of liquid level detection device of the present invention offers the structural schematic diagram of water inlet；
Fig. 4 is the circuit structure block diagram of liquid level detection device of the present invention；
Fig. 5 is the flow diagram of liquid-level detecting method of the present invention；
Fig. 6 is the flow diagram of liquid-level detecting method first embodiment of the present invention；
Fig. 7 is another embodiment flow diagram that liquid-level detecting method of the present invention corresponds to the first embodiment；
Fig. 8 is the another embodiment flow diagram that liquid-level detecting method of the present invention corresponds to the first embodiment；
Fig. 9 is the flow diagram of liquid-level detecting method second embodiment of the present invention.
Drawing reference numeral explanation:
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
The present invention proposes a kind of liquid level detection device and liquid-level detecting method, referring to FIG. 1 to FIG. 4, the liquid level inspection
It surveys device and is used to detect the liquid level in liquid reserve tank 10, the liquid level detection device includes detection bucket 20, control module 50, air pressure
Detection device 40, the liquid reserve tank 10 have the cavity for accommodating liquid；The detection bucket 20 has to be connected to the cavity
Water inlet 21, the detection bucket 20 forms linker with the liquid reserve tank 10.Air pressure detection dress is equipped in the detection bucket 20
40 are set, for detecting air pressure in the detection bucket 20；The pressure test device 40 is electrically connected with the control module 50, with
The air pressure signal in detection bucket 20 that will test is exported to control module 50, and the control module 50 includes memory, processing
Device and it is stored in the level sensing program that can be run on the memory and on the processor, the level sensing program quilt
The step of liquid-level detecting method is realized when the processor executes.
In the application, water can be accommodated in the liquid reserve tank 10 or other are non-corrosive, air solubility is low, density is bullied
The pressure factors such as temperature influence small other liquid, in following embodiment, are illustrated using the liquid as water.The detection bucket 20
Water inlet 21 and 10 bottom of liquid reserve tank have certain height distance, the height distance can be arbitrary value, as long as making
The enough water inlets 21 from the detection bucket 20 of water energy in the liquid reserve tank 10 enter in the detection bucket 20.When described
When 21 height of water inlet for thering is water and height of water level to be higher than the detection bucket 20 in liquid reserve tank 10, shape in the detection bucket 20 at this time
At a closed gas chamber, with the variation of water level in the liquid reserve tank 10, the water level in the detection bucket 20 is also accordingly sent out
The water inlet 21 of changing, water from the detection bucket 20 enters in the detection bucket 20, and compresses the gas in the detection bucket 20
Body, first pressure test device 40 are located in the closed gas chamber, for detecting the gas in the detection bucket 20
Body air pressure.In the application, the pressure test device 40 is preferably the baroceptor with temperature adjustmemt function.
Based on above-mentioned hardware configuration, the embodiment of liquid-level detecting method of the present invention is proposed.
Referring to Fig. 5, the liquid-level detecting method the following steps are included:
S10 obtains the second air pressure and last inspection in the detection bucket 20 that presently described pressure test device 40 detects
The first air pressure surveyed；
S20 calculates the second liquid level in presently described liquid reserve tank 10 according to first air pressure and the second air pressure.
The control module 50 issues control signal, carries out air pressure detection to control the pressure test device 40, according to
The working method of the selected pneumatic shuttle is different, and the pressure test device 40, which can be, is carried out continuously air pressure detection,
It can also be spaced and carry out air pressure detection.The air pressure that the pressure test device 40 will test is converted into corresponding electric signal.This
In scheme, in order to reduce the interference that the pressure test device 40 is subject in carrying out air pressure detection, and testing result is caused not
A possibility that accurate, in the present solution, by making first air pressure and the second air pressure be presented as in a period (the period phase
Can be second grade, Millisecond or Microsecond grade to the common liquid level rate of change in the liquid reserve tank 10) detection bucket 20 in
Average gas pressure, so that the presently described detection bucket of reaction that air pressure detected by the pressure test device 40 can be more accurate
Air pressure in 20.
Specifically, the step for obtaining the second air pressure in the detection bucket 20 that presently described pressure test device 40 detects
Suddenly include:
In the first preset duration, the air pressure of the pneumatic shuttle detection of the first preset quantity is continuously acquired；
Processing is averaged to the air pressure of first preset quantity, to obtain in presently described detection bucket 20
Two air pressures.
If the first preset duration is T, the first preset quantity is n, and first preset duration can be the time of Millisecond
Length.Control module 50 obtains the air pressure in current detection bucket 20 at interval of period of time T from baroceptor, by n
Period of time T, to the barometric information handling averagely in n detection bucket 20, to obtain the second air pressure in the detection bucket 20.
Handling averagely described herein, which can be, seeks arithmetic mean of instantaneous value, further can be by software program to multiple air pressures
Data are filtered, and filter processing method can use sliding average method, naturally it is also possible to be sought using other average
For the algorithm of value according to being filtered, filter processing method uses sliding average method, but does not limit filtering method.
The second air pressure and last time are detected in the detection bucket 20 that the presently described pressure test device 40 detects
The second preset duration is separated between first air pressure, it is clear that second preset duration is greater than first preset duration.One
In embodiment, second preset duration is m times of first preset duration, therefore the control module 50 is spaced m*n*T
A time cycle obtains the barometric information saved in the primary detection bucket 20, the atmospheric pressure value that continuous 3 m*n*T periods save point
It Wei not PN bucket 1、PN bucket 2、PN bucket 3, previous calculating air pressure difference e2=PN bucket 2-PN bucket 1, current to calculate air pressure difference e1=PN bucket 3-PN bucket 2.This
The second air pressure of Shi Suoshu is PN bucket 3, the first air pressure of the last detection is PN bucket 2。
Second liquid level calculated according to first air pressure and the second air pressure in presently described liquid reserve tank 10 include with
Lower step:
S21 obtains the first liquid level corresponding with first air pressure in the liquid reserve tank 10 of storage；
S22 calculates the liquid reserve tank 10 according to first air pressure, the air pressure of second air pressure and the first preset formula
Interior liquid level variable quantity；
S23, calculate first liquid level and the liquid level variable quantity and value, obtain second liquid level.
It is understood that the liquid level for example within the first moment, the liquid reserve tank 10 is first liquid level, and at this
Moment, the air pressure detected in bucket 20 are first air pressure.
When air pressure change is Δ P in the detection bucket 20, liquid level variation is Δ H in the corresponding detection bucket 20Bucket, right
Answer liquid level changes delta H in liquid reserve tank 10Storage, according to law of connected vessels Δ HStorage=Δ P/ (ρ g)+Δ HBucket, ρ is in the liquid reserve tank 10
Fluid density, g is acceleration of gravity.According to general gas law, 20 body height H of bucket is detectedBucketWhen no more than L, Δ HWaterWith Δ
HBucketRatio differs greatly, therefore the liquid level variation in the detection bucket 20 can be ignored；Here L value is not more than 102mm, but not
It is limited to this value.First preset formula described herein is Δ HStorage=Δ P/ (ρ g).Therefore it is based on known first liquid level and passes through institute
State the liquid level variation delta H in the liquid reserve tank 10 that the first preset formula obtainsStorage, to obtain the second liquid level HN water=
HL water+ e1/k, wherein the HL waterFor the first liquid level, e1 is the difference of the second air pressure and the first air pressure；It is understood that described
Liquid level variation delta H in liquid reserve tank 10StorageIt is a relative quantity, i.e., when liquid level increases in liquid reserve tank 10, the Δ HStorageIt is positive
It is worth, when liquid level reduces in liquid reserve tank 10, the Δ HStorageFor negative value.While in order to improve the accurate of the SEA LEVEL VARIATION trend of detection
Property, according to previous calculating air pressure difference e2=PN bucket 2-PN bucket 1, current to calculate air pressure difference e1=PN bucket 3-PN bucket 2To judge current liquid storage
It is for water inlet state or to discharge water state in case 10.
It should be noted that general gas law, that is, The Ideal-Gas Equation, ρ V=nRT, ρ refer to the pressure of perfect gas
By force, V is the volume of perfect gas, and n indicates the amount of gaseous matter, and T then indicates the thermodynamic temperature of perfect gas, and R is ideal gas
Body constant, in the use environment of the liquid level detection device, the closed gas and atmosphere in this programme in detection bucket 20 are full
The foot The Ideal-Gas Equation.ρ × s × h=nRT in the detection bucket 20, s are the cross-sectional area of the detection bucket 20, h
It is closed gas pillar height degree.Height of water level is just close to H in liquid reserve tank 10Bucket bottom.Gas atmosphere is equal to atmosphere in 20 body of detection bucket
It presses, at this time PAtmosphere×s×HBucket=nRT when water level increases to H1 in liquid reserve tank 10, detects liquid level correspondence in bucket 20 and rises to L1, examine
Surveying closed gas air pressure in bucket 20 is P1, at this time P1×s×(HBucket- L1)=nRT=PAtmosphere×s×HBucket, P1=PAtmosphere+ρg(H1-
L1), according to above formula H1/L1=P1/ (ρ g)/HBucket+ 1, ρ=1000kg/m3, g=9.8N/kg, HBucketWhen no more than 102mm, H1/L1
When >=0.001 × P1+1, P1 value are greater than or equal to 99960 ρ a (1 standard atmospheric pressure is 101325 ρ a), it can be deduced that H1/
L1 is greater than 100, therefore, can ignore L1 changing value in this case.It should be noted that when closed gas in detection bucket 20
When body air pressure value is less than 99960, by adjusting HBucketThe ratio of height also adjustable H1/L1, to ignore L1 changing value.
Referring to Fig. 6, further, in order to realize the liquid level in liquid reserve tank 10 described in real-time detection, described in the calculating
First liquid level and the liquid level variable quantity and value, after the step of obtaining second liquid level further include:
Second liquid level replacement is stored as first liquid level, second air pressure is stored as described upper one by S40
First air pressure of secondary detection；
Be transferred to execute it is described obtain in the detection bucket 20 that presently described pressure test device 40 detects the second air pressure and
The step of first air pressure of last time detection.
It was located at for the first moment, the liquid level in the liquid reserve tank 10 is first liquid level, and the air pressure detected in bucket 20 is institute
The first air pressure is stated, when current time was the second moment, the liquid level in the liquid reserve tank 10 is second liquid level, detects bucket 20
Interior air pressure be second air pressure, due to the liquid level in the liquid reserve tank 10 with water filling or draining carry out being to become in real time
Change, therefore when the current time proceeds to next moment-third moment at second moment, utilization the application's
When liquid-level detecting method calculates the liquid level of the liquid storing barrel at the third moment, institute that second moment is detected
It states the replacement of the second liquid level and is stored as first liquid level, second air pressure is stored as to the first gas of the last detection
Pressure, the liquid level in the liquid reserve tank 10 corresponding to the third moment is second liquid level at this time, in the detection bucket 20
Air pressure be second air pressure.It is understood that in the 4th moment liquid storage of next moment for calculating the third moment
When liquid level in case 10 and same iterative step.First moment, the second moment, between the third moment ... when
Between between be divided into it is preset.Application scheme can be realized the real-time detection of liquid level in liquid reserve tank 10 as a result,.
In the present solution, the liquid level detection device has memory module, running, the liquid-level detecting method detection is real-time
It when the liquid level of variation, does not need to save second liquid level being calculated every time, preset time guarantor can be spaced
It deposits once, but during shutdown, need to save second liquid level at current time, to run the liquid level inspection as booting next time
When survey method, using second liquid level as the first liquid level in the step S10.Specifically,
The calculate first liquid level and the liquid level variable quantity and value, after the step of obtaining second liquid level
Further include:
When getting the signal for stopping level sensing, the second liquid level in presently described liquid reserve tank 10 is saved；
When getting the signal of starting level sensing, using the air pressure detected for the first time as the last detection
First air pressure, using second liquid level of preservation as the first liquid level of the last detection.
In the present embodiment, the signal for stopping level sensing includes but is not limited to the shutdown letter of the liquid level detection device
Number, the signal of the starting level sensing includes but is not limited to the starting-up signal of the liquid level detection device.
Referring to Fig. 9, in a second embodiment, in order to avoid being caused in the detection bucket 20 when atmospheric pressure changes
Air pressure changes, so that error occurs for the calculating of second liquid level, it is described herein according to first air pressure
Calculate the second liquid level in presently described liquid reserve tank 10 with the second air pressure the following steps are included:
S30 calculates the air pressure difference of first air pressure and second air pressure；
S31 calculates the atmosphere of the air pressure difference and storage when the air pressure difference is not more than preset pressure changing value
Air pressure and value, and by the air pressure difference and the atmospheric gas pressure and value update the atmospheric gas pressure of replacement storage；
S32 according to second air pressure, updates the replaced atmospheric gas pressure and the second preset formula calculates described the
Two liquid levels.
Wherein, in water inlet 21 of the liquid level of the liquid reserve tank 10 lower than the detection bucket 20, the air pressure inspection is stored
Survey the atmospheric gas pressure that the air pressure that device 40 detects is the storage.
In another embodiment, can also be by calculating in the third preset duration apart from current time, the detection bucket
Air pressure difference in 20 is compared with preset pressure changing value, and with liquid level in the determination current liquid reserve tank 10, whether there is or not hairs
Raw to change, the third preset duration is greater than or equal to the duration between the moment corresponding to first air pressure and the second air pressure.
When liquid level is lower than the water inlet 21 for detecting 20 body of bucket in the liquid reserve tank 10, the detection bucket 20 is communicated with the atmosphere at this time, institute
The air pressure stated in detection bucket 20 is atmospheric gas pressure.In the subsequent calculating for carrying out second liquid level, when the detection bucket 20
When interior air pressure changes, first determine this is because caused by air pressure change, or due to the SEA LEVEL VARIATION in liquid reserve tank 10
Caused by.If the air pressure change amount in the detection bucket 20 is greater than preset pressure changing value, it is determined that water in the liquid reserve tank 10
Position is changed, if the air pressure change amount in the detection bucket 20 is less than or equal to preset pressure changing value, it is determined that current
Liquid level does not change, but causes the air pressure in the detection bucket 20 to change since atmospheric gas pressure changes.It is real one
It applies in example, using the difference of second air pressure and first air pressure as the air pressure difference, then current atmospheric pressure PS gas=
PS gas 0± e1, then HS water=(Pn-PS gas)/(pg)+HBucket bottom；PS gas 0For the atmospheric gas pressure of the storage, e1 is the air pressure difference, institute
State PS gasFor the atmospheric gas pressure of the updated storage；PnFor second air pressure, HS waterFor second liquid level.
It is equal with the pressure of water surface equal-height position in detection bucket 20 in the liquid reserve tank 10 based on law of connected vessels, then it is described
Pressure P at the water surface in detection bucket 20Bucket=PS gas+ρg(HS water-HBucket water),PS gasFor atmospheric gas pressure, HS waterIt is real-time level in liquid reserve tank 10,
HBucket waterTo detect the real time water level height in bucket 20, and detect water surface H in bucket 20Bucket waterPressure at height is equal to closed gas pressure
PGas, according to law of connected vessels, the pressure for detecting identical water level eminence inside and outside bucket 20 is equal, then has PGas=Pg+ρg(HS water-HBucket water), because
Change to ignore liquid level in detection bucket 20 (such as when cistern water level changes 1mm, SEA LEVEL VARIATION is less than 0.01mm in detection bucket 20,
Therefore the liquid level variation in the detection bucket 20 can be ignored), HBucket bottomRoughly equal to HBucket water, then have PS barrels=PS gas+ρg(HS water-HBucket bottom), HBucket bottom
It is constant, is the height distance that detection 20 water inlet 21 of bucket arrives between 10 bottom of liquid reserve tank.Therefore it can be concluded that institute
State the second preset formula:K=ρ g, therefore the atmospheric gas pressure P detected byS gas, it is described
Detect the second air pressure P in bucket 20n, bring into above-mentioned function and calculated, and then obtain liquid level H in current liquid reserve tank 10S water。
In the present embodiment, due to can according to it is described detection bucket 20 in air pressure change difference variable quantity judge whether be
Since atmospheric gas pressure changes, and the air pressure in the detection bucket 20 is caused to change, further combines the change of air pressure
Change and measures out the variable quantity of the atmospheric gas pressure, to obtain updated atmospheric gas pressure, due in second preset formula,
Atmospheric gas pressure is to be closer to current atmospheric air pressure after the update, and second air pressure is the gas in presently described detection bucket 20
Pressure, therefore the second liquid level in more accurate presently described liquid reserve tank 10 can be derived that based on second preset formula, it mentions
The high accuracy of the application level sensing.
The accuracy of the level sensing is improved in the application, is further provided with preset reference liquid level.It needs herein
It is explained that reference level is a liquid level being artificially arranged, when a reference level has been determined, so as to be based on being somebody's turn to do
Reference level obtains current liquid level further combined with the variable quantity of liquid level.The detection bucket 20 is set in one embodiment
The corresponding liquid level in 21 place of water inlet is preset reference liquid level, and it is H that the corresponding level value of the reference level, which is arranged,Bucket bottom, HBucket bottomIt is
Detection 20 water inlet 21 of bucket arrives the height distance between 10 bottom of liquid reserve tank.
Referring to Fig. 7, the liquid-level detecting method is further comprising the steps of:
S41, when the absolute value of second liquid level and the preset reference liquid level is less than or equal to the first preset value, clearly
The zero preset reference liquid level；
S42 is preset when the absolute value of second air pressure and the difference of first air pressure is greater than or equal to described second
Value, saves as the preset reference liquid level and second liquid level for current level, and the first air pressure of last time detection is saved
For the atmospheric gas pressure of the storage.
When the liquid level in the liquid reserve tank 10 constantly reduces, the air pressure detected in bucket 20 constantly reduces therewith, when described the
When the absolute value of two liquid levels and the preset reference liquid level is less than or equal to the first preset value, then it represents that liquid in the liquid reserve tank 10
Position has fallen near the reference level, resets the preset reference liquid level at this time.When to being filled the water in liquid reserve tank 10, when described
The absolute value of the difference of second air pressure and first air pressure is greater than or equal to second preset value, then it represents that the detection bucket
Atmospheric pressure value in 20 is mutated, and water level reaches the reference level at this time, and current level is saved as the preset reference
Liquid level and second liquid level.Current atmospheric gas pressure is the first air pressure of the last detection, it is possible thereby to according to above-mentioned
Liquid level in the subsequent liquid reserve tank 10 of the first embodiment or the second embodiment real-time detection.Through this embodiment, it realizes
The correction of reference point liquid level avoids causing reference point liquid level to change since multiple water level detecting and atmospheric gas pressure change
Become, the error in turn resulting in level sensing increases.
Referring to Fig. 8, in another embodiment, reference point water level (can be needed taking human as being arranged in arbitrary liquid level
Higher than the water inlet 21 of the detection bucket 20).Therefore it is calculated described according to first air pressure and the second air pressure presently described
It is at least executed before the step of the second liquid level in liquid reserve tank and primary obtains reference level method.Specifically, it can be and powering on
The method that reference level is obtained described in Shi Yunhang is also possible to change in need at any time or re-calibrates reference level
When, run the method for obtaining reference level.It is described when preset reference level is located at the water inlet of the detection bucket
The method of reference level the following steps are included:
Obtain the of the second air pressure and last detection in the detection bucket that presently described pressure test device 40 detects
One air pressure；
When the absolute value of second air pressure and the difference of first air pressure is less than or equal to the first preset value, and under
It, will be current when the absolute value of one moment, second air pressure and the first air pressure difference is greater than or equal to four preset values
Liquid level saves as the preset reference level.
When the preset reference level is located higher than any liquid level of detection 20 bung height of bucket, the reference
The method of liquid level the following steps are included:
According to the corresponding relationship of air pressure in liquid level in the preset liquid reserve tank 10 and detection bucket 20, when the liquid reserve tank 10
When interior default liquid level is H0, the preset pressure value P0 in the corresponding detection bucket 20 is obtained；
When the water inlet 21 of the detection bucket 20 is communicated with the atmosphere, the current gas pressure in the detection bucket 20 is obtained, i.e.,
The atmospheric gas pressure of current environment；
Increase the amount of liquid in the liquid reserve tank 10, obtains the air pressure in the detection bucket 20；
When the absolute value of atmospheric pressure value and the preset pressure value P0 difference in the detection bucket 20 is less than or equal to first
When preset value, stop increasing the amount of liquid in the liquid reserve tank 10, and save current level, using as the reference level.
The present embodiment works as institute by establishing liquid level and the corresponding relationship for detecting air pressure in bucket 20, determination in the liquid reserve tank 10
It states and presets liquid level in liquid reserve tank 10 when being H0, obtain the preset pressure value P0 in the corresponding detection bucket 20, and then can pass through
When atmospheric pressure value in the detection bucket 20 reaches or approaches P0, the liquid level H0 in liquid reserve tank 10 is determined, to be preset
Liquid level is reference level corresponding to H0.Technical solution of the present invention realizes can according to the demand of user, by arbitrary liquid level
Height is determined as the reference level height H0 for needing to be arranged, and the acquisition methods of technical solution reference level according to the present invention, obtains
To required reference level.Further, since the determination of arbitrary liquid level can be set as pre- by technical scheme
If liquid level H0, and then generated cumulative errors during multiple level sensing can be reduced, improve level sensing precision.
Further, the amount of liquid increased in the liquid reserve tank 10 obtains the step of the air pressure in the detection bucket 20
Before rapid further include:
When having liquid in the detection bucket 20, the amount of liquid in the liquid reserve tank 10 is reduced；
Every the first preset time, the air pressure in the detection bucket 20 is obtained；
When the absolute value of the atmospheric pressure value difference in the adjacent detection bucket 20 detected twice is less than or equal to second in advance
If when value, stopping reducing the amount of liquid in the liquid reserve tank 10, and obtain the current gas pressure value in the detection bucket 20.
In the present embodiment, first right at this time if having water in the detection bucket 20 when starting to carry out the acquisition of reference level
The liquid reserve tank 10 is drained, so that the liquid level in the detection bucket 20 constantly reduces, adjacent is detected twice until described
The detection bucket 20 in atmospheric pressure value difference absolute value be less than or equal to the second preset value when, then it represents that the detection at this time
Bucket 20 has been communicated with the atmosphere, therefore even if draining again to the liquid reserve tank 10, and the air pressure in the detection bucket 20 will not
Apparent variation occurs, the air pressure in the detection bucket 20 is atmospheric pressure at this time.Specifically, logical by the control module 50
Cross the water for controlling the drain solenoid valve opening to be discharged in the liquid reserve tank 10.Second preset value can be 0 or one
Close to 0 value.The present embodiment is by first draining the liquid reserve tank 10, so that detection bucket 20 is communicated with the atmosphere, to obtain
Current atmospheric value is obtained, and then carries out subsequent calculating using the atmospheric value, computational accuracy is effectively improved, so that being obtained
The reference level obtained has more accuracy.
The detection that presently described pressure test device 40 detects is obtained based on the above embodiment
Before the step of the first air pressure that second air pressure and last time are detected in bucket 20 further include:
Receive the instruction that starting detects liquid level in the liquid reserve tank 10.
The instruction that the starting detects liquid level in the liquid reserve tank 10 can be by remote controler, keypad, cell phone application, language
The transmissions such as sound module/setting are also possible to meet acquisition reference level function described in automatic trigger after condition.It is corresponding, institute
Stating liquid level detection device further includes the human-computer interaction module 60 being electrically connected with the control module 50；The human-computer interaction module 60
Including one of push-button unit, remote control unit, cell phone application, voice module or a variety of.The push-button unit, remote control unit, hand
The physical circuit setting of machine APP, voice module can refer to the prior art, and details are not described herein.
The shape of liquid reserve tank 10 described in this programme, the detection bucket 20 of the liquid level detection device can be arbitrary shape,
In one embodiment, the detection bucket 20 is in U-shape, and the U-shaped detection bucket 20 has the first pipe arm and the second pipe arm, wherein the
The bottom end of one pipe arm is water inlet, the bottom end seal of the second pipe arm.In another embodiment, the detection bucket 20 is in the form of a column, institute
It states water inlet 21 and is opened in 20 bottom of detection bucket and/or side.Further, the water inlet 21 is located at the detection
The top of the bottom of bucket 20, the detection bucket 20 is sealing, and specifically, the detection bucket 20 includes that staving and sealing cover close
Sealing block 11 at the top of the staving, the pressure test device 40 are set on the sealing block 11 or on the staving.Into one
Step ground, the sealing block 11 are equipped with the mounting hole 12 for the pressure test device 40 installation, the pressure test device 40
It further include the sealing element for connecting the pressure test device 40 and the sealing block 11.The sealing element can be sealing ring, institute
The detector for stating pressure test device 40 extends to inside the detection bucket 20 from the mounting hole 12.The sealing ring is also used to
The pressure test device 40 is connected on the sealing block 11, therefore this programme can efficiently reduce encapsulation process.
The liquid level detection device further includes support frame 30, and the detection bucket 20 is connect with the crossbeam, and the crossbeam
It is equipped with the wire casing accommodated for the conducting wire of the pressure test device 40.Further, support frame as described above 30 is located at the detection
The upside of bucket 20, the detection bucket 20 are connect by card slot or sliding slot with support frame as described above 30.Therefore technical solution of the present invention
Liquid level detection device installation site is flexible, and cabling is convenient, convenient for being integrated in other equipment.
In order to accurately control inflow and displacement, in the application, the liquid reserve tank 10 has water inlet 13 and/or row
The mouth of a river, and the liquid reserve tank 10 has the water inlet line connecting with the water inlet 13, and/or the draining connecting with discharge outlet
Pipeline.The water inlet 13 can be used as water outlet, can also be separately provided with the water outlet.The water inlet 13 can be opened
Set on the side or bottom of the liquid reserve tank 10, the water outlet is preferably opened in the bottom of the liquid reserve tank 10.The liquid level
Detection device further includes the water inlet switch element for controlling the water inlet line and opening/closing；And/or the control drainage pipeline is beaten
The drainage switch element of opening/closing.The water inlet switch element and the drainage switch element can be solenoid valve (including water inlet
Solenoid valve, drain solenoid valve), the solenoid valve is electrically connected with the control module 50, in the control of the control module 50
Under, it is opened/closed with controlling the water inlet line and/or drainage pipeline, the water tank is filled the water or discharged water to realize.
The present invention also proposes a kind of air conditioner, has liquid reserve tank and the liquid level detection device in the air conditioner；
The liquid reserve tank is connect with the heat exchanger by pipeline, is supplied with receiving condensed water and/or the liquid reserve tank of the heat exchanger
The water inlet 13 of the air conditioner external water source connection.There is the liquid level detection device in the air conditioner；The air-conditioning
Device can be on-hook, cabinet-type air conditioner, ceiling machine, window machine, movable air conditioner, embedded type air conditioner etc..It will be appreciated by those skilled in the art that
, the air conditioner is with heat exchanger, in one embodiment, the water inlet 13 and the heat exchanger of the liquid level detection device
Connection, to receive the condensed water of heat exchanger, the liquid reserve tank 10 can be the drip tray of the air conditioner；In another embodiment
In, the water inlet 13 of the liquid reserve tank is for the water source connection outside the air conditioner.The control module of the liquid level detection device
50 can be the master control borad of the air conditioner.
In one embodiment, the air conditioner obtains the liquid level in the liquid reserve tank 10, and works as the liquid reserve tank 10
When interior liquid level reaches preset liquid level, the drain solenoid valve that the control module 50 controls the liquid reserve tank 10 is beaten
It opens, will accumulate in drip tray using the water in the liquid reserve tank 10, dust on the components such as drainpipe, filter screen, residue
It is rinsed, clean effect is carried out to air conditioner to realize.In another embodiment, the air conditioner includes atomizer, institute
It states atomizer to connect with the liquid reserve tank, to be atomized the liquid in the liquid reserve tank.The specific structure of the atomizer
Be referred to the prior art, details are not described herein, the atomizer by being atomized to the liquid in the liquid reserve tank so that
The air conditioner has humidification function.
The present invention also proposes a kind of computer readable storage medium, is stored with liquid level on the computer readable storage medium
The step of detection program, the level sensing program realizes the liquid-level detecting method when being executed by processor.The liquid level inspection
The specific steps of survey method are referring to above-described embodiment, and details are not described herein.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (16)
1. a kind of liquid-level detecting method, which is characterized in that the liquid-level detecting method is used for liquid level detection device, the liquid level inspection
Survey device and be used to detect liquid level in liquid reserve tank, the liquid level detection device includes detection bucket, the water inlet of the detection bucket with
The liquid reserve tank internal cavity connection is equipped in the detection bucket so that the detection bucket and the liquid reserve tank form linker
Pressure test device；The liquid-level detecting method the following steps are included:
Obtain the first air pressure of the second air pressure and last detection in the detection bucket of presently described pressure test device detection；
The second liquid level in presently described liquid reserve tank is calculated according to first air pressure and the second air pressure.
2. liquid-level detecting method as described in claim 1, which is characterized in that described according to first air pressure and the second air pressure
Calculate the second liquid level in presently described liquid reserve tank the following steps are included:
Obtain the first liquid level corresponding with first air pressure in the liquid reserve tank of storage；
The liquid level variable quantity in the liquid reserve tank is calculated according to first air pressure, second air pressure and the first preset formula；
Calculate first liquid level and the liquid level variable quantity and value, obtain second liquid level.
3. liquid-level detecting method as claimed in claim 2, which is characterized in that described to calculate first liquid level and the liquid level
Variable quantity and value, after the step of obtaining second liquid level further include:
Second air pressure is stored as to the first air pressure of the last detection, second liquid level replacement is stored as described
First liquid level；
It is transferred to and executes the second air pressure and last inspection in the detection bucket for obtaining presently described pressure test device detection
The step of the first air pressure surveyed.
4. liquid-level detecting method as claimed in claim 2, which is characterized in that described to calculate first liquid level and the liquid level
Variable quantity and value, after the step of obtaining second liquid level further include:
When getting the signal for stopping level sensing, the second liquid level in presently described liquid reserve tank is saved；
When getting the signal of starting level sensing, using the air pressure detected for the first time as the first of the last detection
Air pressure, using second liquid level of preservation as the first liquid level of the last detection.
5. liquid-level detecting method as described in claim 1, which is characterized in that described according to first air pressure and the second air pressure
Calculate the second liquid level in presently described liquid reserve tank the following steps are included:
Calculate the air pressure difference of first air pressure and second air pressure；
When the air pressure difference is not more than preset pressure changing value, the sum of the atmospheric gas pressure of the air pressure difference and storage is calculated
Value, and by the air pressure difference and the atmospheric gas pressure and value update replace with the atmospheric gas pressure of storage；
Second liquid level is calculated according to second air pressure, the atmospheric gas pressure of the storage and the second preset formula.
6. liquid-level detecting method as claimed in claim 5, which is characterized in that be lower than the detection bucket in the liquid level of the water tank
Water inlet when, the air pressure for storing pressure test device detection is the atmospheric gas pressure of the storage.
7. liquid-level detecting method as claimed in claim 6, which is characterized in that liquid corresponding to the water inlet of the detection bucket
Position is preset reference liquid level, second liquid level calculated in presently described liquid reserve tank according to first air pressure and the second air pressure
It is further comprising the steps of later:
When the absolute value of second liquid level and the preset reference liquid level is less than or equal to the first preset value, reset described pre-
If reference level；
When the absolute value of second air pressure and the difference of first air pressure is greater than or equal to second preset value, will work as
Preceding liquid level saves as the preset reference liquid level and second liquid level, and the first air pressure of last time detection is saved as described deposit
The atmospheric gas pressure of storage.
8. liquid-level detecting method as described in claim 1, which is characterized in that described according to first air pressure and the second gas
Pressure at least executes before calculating the step of the second liquid level in presently described liquid reserve tank and once obtains reference level method.
9. a kind of liquid level detection device, for detecting the liquid level in liquid reserve tank, which is characterized in that the liquid level detection device packet
It includes:
Bucket is detected, there is the water inlet being connected to the cavity in the liquid reserve tank, the detection bucket and the liquid reserve tank, which are formed, to be connected
Logical device；
Pressure test device is set in the detection bucket, for detecting air pressure in the detection bucket；
Control module, the control module are electrically connected with the pressure test device；The control module includes memory, processing
Device and it is stored in the level sensing program that can be run on the memory and on the processor, the level sensing program quilt
The step of processor realizes liquid-level detecting method as described in any one of claim 1 to 7 when executing.
10. liquid level detection device as claimed in claim 9, which is characterized in that the detection bucket is in the form of a column, and the water inlet is opened
Set on the detection bucket bottom and/or side.
11. liquid level detection device as claimed in claim 9, which is characterized in that the detection bucket includes staving and sealing cover
Close the sealing block at the top of the staving；
The pressure test device is set on the sealing block or on the staving.
12. liquid level detection device as claimed in claim 9, which is characterized in that the liquid level detection device further includes support frame,
The detection bucket is connect with the crossbeam, and the crossbeam is equipped with the wire casing accommodated for the conducting wire of the pressure test device.
13. liquid level detection device as claimed in claim 9, which is characterized in that the liquid level detection device further include with it is described
The human-computer interaction module of control module electrical connection；
The human-computer interaction module includes one of push-button unit, remote control unit, cell phone application, voice module or a variety of.
14. a kind of air conditioner, which is characterized in that there is liquid reserve tank and as claim 9 to 13 is any one in the air conditioner
Liquid level detection device described in；
The liquid reserve tank is connect with the heat exchanger by pipeline, to receive the condensed water and/or the liquid storage of the heat exchanger
Case supplies the water inlet of air conditioner external water source connection.
15. air conditioner as claimed in claim 14, which is characterized in that the air conditioner includes atomizer, the atomizer with
The liquid reserve tank connection, to be atomized to the liquid in the liquid reserve tank.
16. a kind of computer readable storage medium, which is characterized in that be stored with liquid level inspection on the computer readable storage medium
Ranging sequence, the level sensing program realize liquid level inspection as described in any one of claim 1 to 7 when being executed by the processor
The step of survey method.
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| CN201910119378.6A CN109882929B (en) | 2019-02-15 | 2019-02-15 | Liquid level detection method, liquid level detection device, air conditioner and computer readable storage medium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110269559A (en) * | 2019-08-05 | 2019-09-24 | 珠海格力电器股份有限公司 | Dish washing machine and washing control method |
| CN110295481A (en) * | 2019-06-25 | 2019-10-01 | 无锡小天鹅电器有限公司 | Water-filling method, device and device for clothing processing |
| CN112723165A (en) * | 2020-12-31 | 2021-04-30 | 上海海事大学 | Measuring device for bridge crane, bridge crane and measuring method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201611143U (en) * | 2010-03-19 | 2010-10-20 | 山东志伟电子科技有限公司 | Air conditioner auxiliary cooling energy-saving apparatus |
| US20120272669A1 (en) * | 2011-02-11 | 2012-11-01 | Johnson Controls Technology Company | Hvac unit with hot gas reheat |
| CN105758495A (en) * | 2016-03-30 | 2016-07-13 | 连云港大发环保科技有限公司 | Air pressure sensing level gauge and measuring method thereof |
| CN107388410A (en) * | 2017-08-19 | 2017-11-24 | 北京晶海科技有限公司 | A kind of air-conditioning |
-
2019
- 2019-02-15 CN CN201910119378.6A patent/CN109882929B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201611143U (en) * | 2010-03-19 | 2010-10-20 | 山东志伟电子科技有限公司 | Air conditioner auxiliary cooling energy-saving apparatus |
| US20120272669A1 (en) * | 2011-02-11 | 2012-11-01 | Johnson Controls Technology Company | Hvac unit with hot gas reheat |
| CN105758495A (en) * | 2016-03-30 | 2016-07-13 | 连云港大发环保科技有限公司 | Air pressure sensing level gauge and measuring method thereof |
| CN107388410A (en) * | 2017-08-19 | 2017-11-24 | 北京晶海科技有限公司 | A kind of air-conditioning |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295481A (en) * | 2019-06-25 | 2019-10-01 | 无锡小天鹅电器有限公司 | Water-filling method, device and device for clothing processing |
| CN110269559A (en) * | 2019-08-05 | 2019-09-24 | 珠海格力电器股份有限公司 | Dish washing machine and washing control method |
| CN110269559B (en) * | 2019-08-05 | 2024-03-19 | 珠海格力电器股份有限公司 | Dish washer and washing control method |
| CN112723165A (en) * | 2020-12-31 | 2021-04-30 | 上海海事大学 | Measuring device for bridge crane, bridge crane and measuring method |
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| CN109882929B (en) | 2022-06-07 |
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