ASTM F820-2006 Test Method for Measuring Air Performance Characteristics of Central Vacuum Cleaning Systems《测量中央真空吸尘系统的空气性能特征的测试方法》.pdf

1、Designation: F 820 06An American National StandardStandard Test Method forMeasuring Air Performance Characteristics of CentralVacuum Cleaning Systems1This standard is issued under the fixed designation F 820; the number immediately following the designation indicates the year oforiginal adoption or,

2、 in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers procedures for determining airperformance characteristi

3、cs of household central vacuumcleaning systems, which use a flexible cleaning hose assemblyand incorporates a series universal motor(s). This test methoddoes not apply to the carpet cleaning mode of operation wheredirt or debris is involved.1.2 These tests and calculations include determination ofsu

4、ction, airflow, air power, maximum air power, and inputpower under standard operating conditions (see Note 1).NOTE 1For more information on air performance characteristics, seeRefs (1-6).21.3 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are

5、 providedfor information only.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitation

6、s prior to use. A specific precau-tionary statement is given in Note 4.2. Referenced Documents2.1 ASTM Standards:3E1 Specification for ASTM Liquid-in-Glass ThermometersE 177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE 691 Practice for Conducting an Interlaboratory Study toD

7、etermine the Precision of a Test MethodF 431 Specification for Air Performance Measurement Ple-num Chamber for Vacuum Cleaners2.2 AMCA Standard:421085 Laboratory Methods of Testing Fans for Rating2.3 IEC Standard:5IEC 60312 Ed 3.2 Vacuum Cleaners for Household UseMethods of Measuring the Performance

8、3. Terminology3.1 Definitions:3.1.1 air power, AP, W, nin a vacuum cleaner, the net timerate of work performed by an air stream while expendingenergy to produce an airflow by a vacuum cleaner underspecified air resistance conditions.3.1.2 automatic bleed valve, nany device a part of avacuum cleaners

9、 design, which automatically introduces anintentional leak within the vacuum cleaners system whenmanufacturer specified conditions are met.3.1.3 corrected airflow, Q, cfm, nin a vacuum cleaner, thevolume of air movement per unit of time under standardatmospheric conditions.3.1.4 input power, W, nthe

10、 rate at which electrical energyis absorbed by a vacuum cleaner.3.1.5 model, nthe designation of a group of vacuumcleaners having the same mechanical and electrical construc-tion with only cosmetic or nonfunctional differences.3.1.6 population, nthe total of all units of a particularmodel vacuum cle

11、aner being tested.3.1.7 repeatability limit (r), nthe value below which theabsolute difference between two individual test results obtainedunder repeatability conditions may be expected to occur with aprobability of approximately 0.95 (95 %).3.1.8 reproducibility limit (R), nthe value below whichthe

12、 absolute difference between two test results obtained underreproducibility conditions may be expected to occur with aprobability of approximately 0.95 (95 %).1This test method is under the jurisdiction of ASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.22 o

13、n Air Perfor-mance.Current edition approved April 1, 2006. Published April 2006. Originallyapproved in 1988. Last previous edition approved in 2003 as F 820 03.2The boldface numbers in parentheses refer to the list of references at the end ofthis standard.3For referenced ASTM standards, visit the AS

14、TM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Available from Air Movement and Control Association, Inc., 30 West Univer-sity Dr., Arlington Heights, I

15、L 600041893.5Available from the IEC Web store, webstore.iec.ch, or American NationalStandards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.9 repeatability standar

16、d deviation (Sr), nthe standarddeviation of test results obtained under repeatability condi-tions.3.1.10 reproducibility standard deviation (SR), nthe stan-dard deviation of test results obtained under reproducibilityconditions.3.1.11 sample, na group of vacuum cleaners taken from alarge collection

17、of vacuum cleaners of one particular model,which serves to provide information that may be used as a basisfor making a decision concerning the larger collection.3.1.12 standard air density, rstd, lb/ft3, natmospheric airdensity of 0.075 lb/ft3(1.2014 kg/m3).3.1.12.1 DiscussionThis value of air densi

18、ty correspondsto atmospheric air at a temperature of 68 F (20 C), 14.696 psi(101.325 kPa), and approximately 30 % relative humidity.3.1.13 suction, inch of water, nin a vacuum cleaner, theabsolute difference between ambient and subatmospheric pres-sure.3.1.14 test run, nthe definitive procedure that

19、 producesthe singular result of calculated maximum air power.3.1.15 test station pressure, Bt, inch of mercury, nfor avacuum cleaner, the absolute barometric pressure at the testlocation (elevation) and test time.3.1.15.1 DiscussionIt is not the equivalent mean sea levelvalue of barometric pressure

20、typically reported by the airportand weather bureaus. It is sometimes referred to as theuncorrected barometric pressure (that is, not corrected to themean sea level equivalent value). Refer to 5.5 for additionalinformation.3.1.16 unit, na single vacuum cleaner of the model beingtested.4. Significanc

21、e and Use4.1 The test results allow the comparison of the maximumair power available when no dirt has been introduced into thevacuum cleaning system, that is, a completely clean filter or anempty, clean dirt container.5. Apparatus5.1 Plenum ChamberSee Specification F 431 orIEC 60312, Section 5.2.8.2

22、 (Figure 13c).5.2 Water Manometers, or equivalent instruments. One tomeasure from 0 to 6 in. (152.4 mm) in increments of 0.01 in.(0.254 mm), and one with increments of 0.1 in. (2.54 mm) foruse in making measurements above 6 in. (152.4 mm).5.3 Wattmeter, to provide measurements accurate to within61%.

23、5.4 Voltmeter, to provide measurements accurate to within61%.5.5 Barometer, with an accuracy of 60.05 in. (1.27 mm) ofmercury, capable of measuring and displaying absolute baro-metric pressure, scale divisions 0.02 in. (0.51 mm) or finer.5.5.1 Mercury barometers, in general, measure and displaythe a

24、bsolute barometric pressure. Some corrections may beneeded for temperature and gravity. Consult the ownersmanual.5.5.2 When purchasing an aneroid or electronic barometer,be sure to purchase one which displays the absolute barometricpressure, not the mean sea level equivalent barometric pressurevalue

25、. These types of barometers generally have temperaturecompensation built into them and do not need to be correctedfor gravity.5.6 Sharp-Edge Orifice PlatesSee Specification F 431.5.7 ThermometerSolid-stem, ambient thermometer hav-ing a range from 18 to 89F (or 8 to +32C) with graduationsin 0.2F (0.1

26、C), conforming to the requirements for thermom-eter 63F (17C) as prescribed in Specification E1.5.8 PsychrometerThermometers graduated in 0.2 F (0.1C).5.9 Voltage-Regulator System, to control the input voltageto the vacuum cleaner. The regulator system shall be capable ofmaintaining the vacuum clean

27、ers rated voltage 61 % andrated frequency 61 Hz having a wave form that is essentiallysinusoidal with 3 % maximum harmonic distortion for theduration of the test.5.10 Orifice Adapter TubeSee Fig. 1.6. Sampling6.1 A minimum of three units of the same model vacuumcleaner selected at random in accordan

28、ce with good statisticalpractice, shall constitute the population sample.6.1.1 To determine the best estimate of maximum air powerfor the population of the vacuum cleaner model being tested,the arithmetic mean of the maximum air power of the samplefrom the population shall be established by testing

29、it to a 90 %confidence level within 65%.6.1.2 Annex A2 provides a procedural example for deter-mining the 90 % confidence level and when the sample sizeshall be increased.NOTE 2See Annex A2 for method of determining 90 % confidencelevel.7. Test Vacuum Cleaners7.1 New Test Vacuum CleanerRun the vacuu

30、m cleaner inat rated voltage 61% and rated frequency with filters in placefor 1 h with a wide-open inlet (without hose).7.2 Used Test Vacuum CleanersRecondition a used testvacuum cleaner; prior to the initial test run as follows:7.2.1 Thoroughly remove excess dirt from the vacuumcleaner. Without usi

31、ng tools for disassembly, clean the entireouter surface, brushes, nozzle chamber, ductwork, inside of thechamber surrounding the primary filter, and inside hose andwands.7.2.2 For vacuum cleaners using disposable filters as theprimary filters, use a new disposable primary filter from themanufacturer

32、 for each test. Install it as recommended by thevacuum cleaner manufacturer.7.2.3 For vacuum cleaners using non-disposable dirt recep-tacles, empty in accordance with the manufacturers instruc-tions and clean the receptacle until its weight is within 0.07 oz(2 g) of its original weight and install i

33、t as recommended by thevacuum cleaner manufacturer.7.2.4 For vacuum cleaners using non-disposable dirt recep-tacles, empty in accordance with the manufacturers instruc-tions and clean the receptacle until its weight is within 0.07 oz(2 g) of its original weight and install it as recommended by theva

34、cuum cleaner manufacturer.F820062NOTE 3It is preferable to conduct this test method on new testvacuum cleaners prior to any other ASTM test methods to avoidcontamination that could cause performance variations.7.3 Test Vacuum Cleaner Settings If various settings areprovided, set the motor speed sett

35、ing or suction regulator usingthe manufacturers specifications as provided in the instructionmanual for normal operation. If a different setting is used,make a note of the deviation in the test report.8. Procedure8.1 Preparation for Test:8.1.1 Prepare the test unit in accordance with Section 7.Set-u

36、p the test system as shown in Fig. 2. On the intake side,use an adapter terminating with the wall inlet valve. This wallinlet is to be the one specified for installation with the powerunit being tested. All joints should be made in accordance withthe manufacturers specifications and be free of leaks

37、. Insertinto the wall valve a flexible cleaning hose as provided with thesystem. The hose assembly should be that which is offerednormally with the particular unit being tested. For thosesystems, which provide for an external exhaust, connect 2 ft(0.6 m) of exhaust comprised of tubing and exhaust mu

38、ffler, ifa muffler is provided as part of the system.8.1.2 Set the manometers to zero and check all instrumentsfor proper operation.8.1.3 Record the test station pressure and the dry-bulb andwet-bulb temperature readings within 6 ft of the test area. Readthe barometric pressure to the nearest 0.02 i

39、n. (0.51 mm) ofmercury, and the dry-bulb and wet-bulb temperatures to thenearest 0.2 F (or 0.1 C).8.1.3.1 The test area shall be free of major fluctuatingtemperature conditions due to air conditioners or air drafts thatwould be indicated by a thermometer at the immediate testarea.8.1.4 Connect the m

40、anometer or equivalent instrument tothe plenum chamber.8.1.5 Connect a wattmeter and a voltmeter in accordancewith Fig. 3.8.1.5.1 Wattmeter CorrectionIf needed, the indicationmay be corrected for voltmeter and wattmeter potential coilloss by opening the load circuit on the load side of thewattmeter

41、with the line voltage at the operating value. Thewattmeter current connection may be at its most sensitiveposition. Subtract this loss value from the total load indicationto obtain the true load. As an alternative method, use thefollowing equation:FIG. 1 Orifice Adapter TubeF820063Wc5 Wl V2/RT(1)whe

42、re:Wc= corrected wattage,Wl= indicated wattage,V = voltmeter reading, andRT= Rp3 Rv/(Rp+Rv) where RT= total resistance, V,Rp= wattmeter potential coil resistance, V, andRv= voltmeter coil resistance, V.8.2 Test Procedure:8.2.1 Connect the hose assembly to the plenum chamberhose adapter and seal only

43、 this connection (see Fig. 4).8.2.1.1 The end of the hose assembly should be insertedinside the hose connector adapter and be perpendicular to theplenum chamber.8.2.1.2 The end of the hose assembly shall not project intothe plenum chamber.8.2.1.3 Any automatic bleed valve, which affects the airperfo

44、rmance of the vacuum cleaner, shall not be defeated.8.2.2 The hose should be supported and kept straight andhorizontal over its entire length.Allowance should be made forthe foreshortening of the hose assembly under the vacuum.Maintain the power unit and dirt canister in their normaloperating orient

45、ation.8.2.3 Operate the vacuum cleaner with no orifice plateinserted in the plenum chamber inlet at nameplate rated voltage61 % and frequency 61 Hz prior to the start of the test run toallow the unit to reach its normal operating temperature. Forvacuum cleaners with dual nameplate voltage ratings, c

46、onducttesting at the highest voltage.Allow the unit to reach its normaloperating temperature before each test run.8.2.4 The vacuum cleaner is to be operated at its nameplaterated voltage 61 % and frequency 61 Hz throughout the test.For vacuum cleaners with dual nameplate voltage ratings,conduct the

47、test at the highest voltage.8.2.4.1 Allow the vacuum cleaner to operate at the openorifice for 1 to 2 min between test runs.8.2.5 While operating the vacuum cleaner in accordancewith 8.2.4, insert orifice plates sequentially into the orificeplate holder of the plenum chamber starting with the larges

48、tsize orifice and following it with the next smaller orifice plate.Use the following orifice plates: 2.0, 1.5, 1.25, 1.0, 0.875, 0.75,0.625, 0.5, 0.375, 0.25, 0.0 in. (50.8, 38.1, 31.7, 25.4, 22.2,19.0, 15.8, 12.7, 9.5, 6.3 mm). The following optional orificeplates also may be used: 2.5, 2.25, 1.75,

49、 1.375, 1.125 in. (63.5,57.2, 44.5, 34.9, 28.6 mm).8.2.6 For each orifice plate, record the suction, h, and inputpower, P, in that order. All readings should be taken within 10s of the orifice insertion. Allow the vacuum cleaner to operateat the open orifice for 1 to 2 min before inserting the nextorifice.NOTE 1Hose is to be supported in a straight line.FIG. 2 Vacuum Cleaning System Test Set-upFIG. 3 Schematic Diagram of Meter ConnectionsF8200648.2.6.1 Read the suction to the nearest graduation of theinstrument. Readings should