CN106885318A - A kind of return air leak detection system and method based on rotary dehumidifier - Google Patents
A kind of return air leak detection system and method based on rotary dehumidifier Download PDFInfo
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- CN106885318A CN106885318A CN201710228794.0A CN201710228794A CN106885318A CN 106885318 A CN106885318 A CN 106885318A CN 201710228794 A CN201710228794 A CN 201710228794A CN 106885318 A CN106885318 A CN 106885318A
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- return air
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- rotary dehumidifier
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- humidity sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/1458—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification using regenerators
- F24F2003/1464—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification using regenerators using rotating regenerators
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of return air leak detection system based on rotary dehumidifier, including rotary dehumidifier and drying shed, the rotary dehumidifier includes the treatment region being dried to outdoor fresh air, return air duct is provided between workshop drying shed and treatment region, at least provided with two Temperature Humidity Sensors for being located at various location on return air duct, position of the Temperature Humidity Sensor on return air duct can adjust.The system can detect whether return air duct leaks and be capable of detecting when which position on return air duct there occurs leakage.
Description
Technical field
The invention belongs to rotary wheel dehumidifying field, more particularly to a kind of return air leak detection system based on rotary dehumidifier and
Method.
Background technology
Rotary wheel dehumidifying is a kind of low-humidity environment control technology of mature and reliable, is widely used in having strictly ambient humidity
It is required that occasion, such as lithium battery, medicine, food, semiconductor industry.Because production technology is very sensitive to air humidity,
Need to avoid the humid air outside workshop from being leaked to either inside, the humidity load in control workshop in continuous flow procedure.
Dehumidification system for runner is made up of rotary dehumidifier and airduct, and wherein airduct includes outdoor fresh air pipe, indoor air-supply again
Pipe, indoor return air pipe and rotary dehumidifier regeneration airduct.Due to being negative pressure inside indoor return air pipe, if sealing effectiveness is poor, room
Exogenous damp air is easily leaked into indoor return air pipe, and the humidity load that rotary dehumidifier is undertaken is significantly increased.When amount of leakage exceedes
After the design dehumidifying surplus of rotary dehumidifier, the relative humidity of either inside cannot just ensure, and then have influence on product quality.Turn
The backwind tube for taking turns dehumidification system is often erected at the top of dust proof workshop, and construction space is narrow and small, and length is generally more than 30 meters, by
Multistage airduct, elbow, be flexible coupling composition, and the difficulty of leak point detection is very big.
At present, the simple effective method of detection return air leakage is there is no in rotary wheel dehumidifying field, if workshop humidity cannot
Meet design requirement, it usually needs gluing encapsulation process is re-started to whole return air pipeline sections, is wasted time and energy, and due to cannot
Real leak point is found, the possibility revealed again is very big.
In mine ventilation field, the patent of invention of the B of Authorization Notice No. CN 104131840 describes one kind based on air shape
The assay method and device of the surface leakage rate of state parameter, the method is at returnairshaft, Ventilator Room ground and wind cave etc. three
Temperature Humidity Sensor and barometric pressure sensor are set, by the atmospheric pressure of measuring point at measurement three, dry-bulb temperature and relatively wet
Degree calculates the water capacity of each measuring point air and than enthalpy, so as to realize the measure to surface leakage rate.Due to mine ventilation
To air leak rate of air curtain requirement it is low, and do not give, return air guard system, the method be not involved with reveal position detection；Simultaneously as needing
Temperature Humidity Sensor and barometric pressure sensor are used, the complexity of measurement and the error of measurement result is increased.
The content of the invention
It is a primary object of the present invention to provide a kind of return air leak detection system based on rotary dehumidifier and method, lead to
Cross carries out leak detection to return air duct, can relatively accurately find leakage point.
To achieve the above objectives, the technical solution adopted by the present invention is：A kind of return air leakage inspection based on rotary dehumidifier
Examining system, including rotary dehumidifier and drying shed, the rotary dehumidifier include the treatment region being dried to outdoor fresh air,
Return air duct is provided between workshop drying shed and treatment region, it is characterised in that at least provided with two positions on return air duct
In the Temperature Humidity Sensor of various location, position of the Temperature Humidity Sensor on return air duct can adjust.
Preferably, the Temperature Humidity Sensor is airduct plug-in type Temperature Humidity Sensor.
Preferably, the return air duct includes the return air branch pipe that return air is responsible for and is connected with drying shed, the return air supervisor
One end is connected with return air branch pipe, and the other end is connected with primary retirn air mouthful and secondary returning air port respectively.
Preferably, it is respectively provided with the position that return air branch pipe and return air supervisor are connected with primary retirn air mouthful and secondary returning air port
There is Temperature Humidity Sensor.
Present invention also offers a kind of return air leakage detection method, comprise the following steps：
Step 1：Temperature Humidity Sensor is inserted at the two ends of return air duct part to be detected, and reads relevant parameter；
Step 2：The relevant parameter read according to step 1 calculates saturated steam partial pressure pws；
Step 3：The saturated steam partial pressure p being calculated in the relevant parameter and step 2 that are read according to step 1wsObtain
Take the air humidity content of test point；
Preferably, also including step 4：Air humidity content according to test point calculates the leakage moisture between two test points；
Preferably, also including step 5：The leakage moisture calculated according to step 4 calculates inleakage；
Step 6, according to Calculation of Air Leakage air leak rate of air curtain.
Preferably, the Temperature Humidity Sensor is airduct plug-in type Temperature Humidity Sensor.
Preferably, the relevant parameter includes temperature t and relative humidity φ.
Preferably, in step 2, saturated steam partial pressure pwsComputing formula it is as follows：
Wherein, T represents the thermodynamic temperature of air, and unit is K, and T=t+273.15, C1~C6 are constant.
Compared with prior art, the invention has the advantages that：
1) system can easily detect that whether leakage and the position to leaking occur in return air duct positions,
And then avoid and resealed at the total interface to return air duct of current use, or even the trouble for reconnecting, section
The time is saved, production efficiency has been improve, while also reducing use cost；
2) Temperature Humidity Sensor uses airduct plug-in type Temperature Humidity Sensor, very easy to use, can be as needed
The parameter of almost optional position on detection return air duct.
Brief description of the drawings
Fig. 1 is schematic diagram according to a preferred embodiment of the present invention
Specific embodiment
Hereinafter describe for disclosing the present invention so that those skilled in the art can realize the present invention.It is excellent in below describing
Embodiment is selected to be only used as citing, it may occur to persons skilled in the art that other obvious modifications.
As shown in figure 1, a kind of return air leak detection system based on rotary dehumidifier, including rotary dehumidifier 1 and workshop
Drying shed 8, the rotary dehumidifier 1 is connected by air supply duct with workshop drying shed 8 with return air duct, the air supply duct
It is used to be sent in workshop drying shed 8 by the dried outdoor fresh air of rotary dehumidifier 1, the return air duct is used to car
The portion gas of frame drying shed outflow are sent back in rotary dehumidifier 1.
The rotary dehumidifier 1 at least includes the treatment region that is dried to outdoor fresh air, and outdoor fresh air is from outdoor fresh air
Mouth 2 enters into treatment region, and the runner in treatment region is dried to the outdoor fresh air for flowing through it, by dried
Outdoor fresh air is entered into workshop drying shed 8 by air outlet 5 and by air supply duct.Specifically, runner and treatment region
Operation principle belongs to prior art, no longer describes in detail herein.
The return air duct includes the multiple return air branch pipes 9 connected with workshop drying shed inside and one end and multiple return air branch
The return air supervisor 7 of pipe connection simultaneously, the other end of return air supervisor 7 respectively with the primary retirn air mouthful 3 being arranged on dehumidifier 1
Connected with secondary returning air port 4.The primary retirn air mouthful 3 is connected with the air inlet for the treatment of region, and secondary returning air port 4 goes out with treatment region
Air port connects, due to being tiny structure (i.e. air pressure inside is less than external pressure) in return air duct, if so leaked, ambient atmos
It is easily advanced into return air duct and then increased the humidity of return air.Return air in return air duct is relatively low with respect to ambient humidity,
It is passed into treatment region, the humidity load for the treatment of region can be reduced, and then energy consumption can be saved, if return air duct is let out
Leakage, not only increases the humidity load for the treatment of region, or even is likely to not reach the requirement of humidity by the outdoor fresh air that treatment region is processed.
And it is also technological means commonly used in the art using return air technology, no longer describes in detail herein.
The detecting system also includes the Temperature Humidity Sensor 13 set on one of return air branch pipe 9 and is arranged on return air main
Temperature Humidity Sensor 14 on pipe 14, can detect whether return air duct between the two is sent out by Temperature Humidity Sensor 13 and 14
Raw leakage, the step of describe the detection method with reference to specific data：
1) parameter of Temperature Humidity Sensor is read, parameter includes temperature and relative humidity：
Return air temperature t and relative humidity φ of the Temperature Humidity Sensor 13 and 14 at a time at measuring point, number are read respectively
Value is respectively：
t14=20.5 DEG C, φ14=8%, t13=20.0 DEG C, φ13=5%
2) the saturated steam partial pressure p at two measuring points is calculatedws：
The computing formula of saturated steam partial pressure is as follows：
Wherein, T represents the thermodynamic temperature of air, and unit is K, T=t+273.15, and then, T14=20.5+273.15
=293.65K, T13=20.0+273.15=293.15K, C1~C6 are constant, and value is C1=-5.8002206E+03, C2
=1.3914993E+00, C3=-4.8640239E-02, C4=4.1764768E-05, C5=-1.4452093E-08, C6=
6.5459673E+00。
And then, lnpws14=C1/T14+C2+C3T14+C4T14 2+C5T14 3+C6lnT14=7.7883
lnpws13=C1/T13+C2+C3T13+C4T13 2+C5T13 3+C6lnT13=7.7574,
Therefore, it is calculated the saturated steam partial pressure at two measuring points：
pws14=2412.231Pa, pws13=2338.804Pa.
3) air humidity content at two measuring points is calculated：
The computing formula of water capacity is as follows：
Wherein, W represents air humidity content, units/kg w/kgda；pwRepresent the steam partial pressure of air, unit Pa；P tables
Show atmospheric pressure, unit Pa takes standard atmospheric pressure, i.e. p=101325Pa at this.
Also, the computing formula of relative humidity is as follows：
Wherein, φ is relative humidity, is measured by Temperature Humidity Sensor in step 1, pwsIt is saturated steam partial pressure,
Calculated in step 2, and then the steam partial pressure p of air can have been drawnw=φ pws, and then, air humidity content
Computing formula is：Therefore, the air humidity content of two test points is：
W14=0.62198 × (8% × 2412.231)/(101325-8% × 2412.231)=1.187 × 10-3kgw/
kgda
W13=0.62198 × (5% × 2338.804)/(101325-5% × 2338.804)=7.187 × 10-4kgw/
Kgda,
Whether change according to water capacity can judge leak, it can be seen that due to W14Value be significantly greater than W13
Value, and then to can interpolate that out and there occurs leakage between two test points.
4) calculate two measuring points between airduct leakage moisture：
The computing formula for leaking moisture is as follows：
mleak=ρairF(W2-W1) (d)
Wherein, mleakRepresent the leakage moisture of airduct between adjacent two measuring point, units/kg/h；ρairRepresent atmospheric density, value
It is 1.2kg/m3；F represents system return air amount, unit m3/ h, in a system for having existed, return air amount be usually it is certain or
What person can set；W1And W2It is the air humidity content of two measuring points.
The return air amount F of the known system is 50000m3/ h, the leakage moisture of airduct between two measuring points：
mleak=1.2 × 50000 × (1.187 × 10-3-7.187×10-4)=28.098kg/h
5) inleakage between two measuring points is calculated：
The computing formula of inleakage is as follows：
Wherein, FleakRepresent the inleakage of airduct between adjacent two measuring point, unit m3/h；WoaRepresent the outer air of backwind tube
Water capacity, units/kgw/kgda, can be measured by Temperature Humidity Sensor.
And then according to the humiture t of outer (equivalent to the outdoor) air of the backwind tube for measuring0=35 DEG C, φ0=60%, use
Same method, is calculated the water capacity W of the outer air of backwind tube0=21.44 × 10-3Kgw/kgda, then above-mentioned two measuring point
Between the air leak rate of air curtain of return air pipeline section be：
According to above-mentioned result of calculation, the return air pipeline section leak case that can intuitively reflect between above-mentioned two measuring point.According to
National regulation《Construct and acceptance specification toilet》The relevant regulations of GB 50591-2010, for the toilet of non-unidirectional stream, be
System allows the criterion of acceptability of air leak rate of air curtain to be less than 2%.
Only take part return air pipeline section due to above-described embodiment to detect, its air leak rate of air curtain illustrates that this part is returned more than 2%
The leakage of airduct section is more serious, it is necessary to emphasis checks that the adpting flange of airduct junction whether there is poorly sealed place.
The Temperature Humidity Sensor is airduct plug-in type Temperature Humidity Sensor, and return air is inserted into by by Temperature Humidity Sensor
The different position of pipeline, can detect whether the return air duct between Temperature Humidity Sensor leaks.Simultaneously as most of
Leakage mostly occurs at return air duct and adpting flange, air-valve installation place, the junction of plenum chamber etc., therefore, humiture is installed
During sensor, preferentially just two Temperature Humidity Sensors should be arranged on the pipeline of said structure both sides with excellent to above-mentioned junction
Choosing is detected.
The sealing situation of whole return air pipeline section is assessed if desired, can be at primary retirn air mouthful 3 and secondary returning air port 4
Temperature Humidity Sensor 11 and 12 is inserted on return air duct, and uses step same as described above, with the inside return air of workshop drying shed 8
The parameter of the Temperature Humidity Sensor 13 at branch pipe 9 is compared.The Temperature Humidity Sensor 13 is prior art, no longer detailed herein
State.
General principle of the invention, principal character and advantages of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not limited to the above embodiments, the simply present invention described in above-described embodiment and specification
Principle, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these change and
Improvement is both fallen within the range of claimed invention.The protection domain of application claims by appending claims and its
Equivalent is defined.
Claims (10)
1. a kind of return air leak detection system based on rotary dehumidifier, including rotary dehumidifier and drying shed, the runner are removed
Wet machine includes the treatment region being dried to outdoor fresh air, and return air duct is provided between workshop drying shed and treatment region, its
It is characterised by, at least provided with two Temperature Humidity Sensors for being located at various location on return air duct, the humiture is passed
Position of the sensor on return air duct can adjust.
2. a kind of return air leak detection system based on rotary dehumidifier according to claim 1, it is characterised in that described
Temperature Humidity Sensor is airduct plug-in type Temperature Humidity Sensor.
3. a kind of return air leak detection system based on rotary dehumidifier according to claim 1 and 2, it is characterised in that
The return air duct includes the return air branch pipe that return air is responsible for and is connected with drying shed, and the return air is responsible for one end and is connected with return air branch pipe
Logical, the other end is connected with primary retirn air mouthful and secondary returning air port respectively.
4. a kind of return air leak detection system based on rotary dehumidifier according to claim 3, it is characterised in that returning
Temperature Humidity Sensor is provided with the position that wind branch pipe and return air supervisor are connected with primary retirn air mouthful and secondary returning air port.
5. a kind of return air leakage detection method based on rotary dehumidifier, comprises the following steps：
Step 1：Temperature Humidity Sensor is inserted at the two ends of return air duct part to be detected, and reads relevant parameter；
Step 2：The relevant parameter read according to step 1 calculates saturated steam partial pressure pws；
Step 3：The saturated steam partial pressure p being calculated in the relevant parameter and step 2 that are read according to step 1wsObtain inspection
The air humidity content of measuring point.
6. a kind of return air leakage detection method based on rotary dehumidifier according to claim 5, it is characterised in that also wrap
Include step 4：Air humidity content according to test point calculates the leakage moisture between two test points.
7. a kind of return air leakage detection method based on rotary dehumidifier according to claim 6, it is characterised in that also wrap
Include：
Step 5：The leakage moisture calculated according to step 4 calculates inleakage；
Step 6, according to Calculation of Air Leakage air leak rate of air curtain.
8. a kind of return air leakage detection method based on rotary dehumidifier according to claim 5, it is characterised in that described
Temperature Humidity Sensor is airduct plug-in type Temperature Humidity Sensor.
9. a kind of return air leakage detection method based on rotary dehumidifier according to claim 5, it is characterised in that described
Relevant parameter includes temperature t and relative humidity φ.
10. a kind of return air leakage detection method based on rotary dehumidifier according to claim 5, it is characterised in that
In step 2, saturated steam partial pressure pwsComputing formula it is as follows：
Wherein, T represents the thermodynamic temperature of air, and unit is K, and T=t+273.15, C1~C6 are constant.
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| CN201710228794.0A CN106885318A (en) | 2017-04-10 | 2017-04-10 | A kind of return air leak detection system and method based on rotary dehumidifier |
| CN202211522806.8A CN115978662A (en) | 2017-04-10 | 2017-04-10 | Return air leakage detection system and method based on rotary dehumidifier |
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- 2017-04-10 CN CN202211522806.8A patent/CN115978662A/en active Pending
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| CN115978662A (en) | 2023-04-18 |
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