FI84758B - Method for measurement of air flow and air distributor in which the method is applied - Google Patents

Method for measurement of air flow and air distributor in which the method is applied Download PDF

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Publication number
FI84758B
FI84758B FI900905A FI900905A FI84758B FI 84758 B FI84758 B FI 84758B FI 900905 A FI900905 A FI 900905A FI 900905 A FI900905 A FI 900905A FI 84758 B FI84758 B FI 84758B
Authority
FI
Finland
Prior art keywords
measuring
air flow
measuring device
inlet pipe
measurement
Prior art date
Application number
FI900905A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI900905A0 (en
FI84758C (en
FI900905A (en
Inventor
Jari Hokkanen
Original Assignee
Lapinleimu Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lapinleimu Oy filed Critical Lapinleimu Oy
Priority to FI900905A priority Critical patent/FI84758C/en
Publication of FI900905A0 publication Critical patent/FI900905A0/en
Priority to DK028591A priority patent/DK28591A/en
Priority to SE9100506A priority patent/SE9100506L/en
Priority to NO91910685A priority patent/NO910685L/en
Publication of FI900905A publication Critical patent/FI900905A/en
Publication of FI84758B publication Critical patent/FI84758B/en
Application granted granted Critical
Publication of FI84758C publication Critical patent/FI84758C/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/36Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G01F1/40Details of construction of the flow constriction devices
    • G01F1/42Orifices or nozzles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/18Supports or connecting means for meters

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Measuring Arrangements Characterized By The Use Of Fluids (AREA)
  • Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
  • Catching Or Destruction (AREA)

Description

8475884758

MENETELMÄ ILMAVIRRAN MITTAAMISEKSI JA ILMAVIRRAN HAJOITIN, JOSSA MENETELMÄÄ ON SOVELLETTUMETHOD OF MEASURING AIRFLOW AND AIRFLOW DIFFUSER IN WHICH THE METHOD HAS BEEN APPLIED

5 Tämän keksinnön kohteena on menetelmä ilmavirran mittaamiseksi mittauslaitteen, kuten mittauslevyn, mittausrenkaan tai mittalaipan, avulla, joka mittauslaite pidetään mittauksen aikana mittausasennossa, ja joka mittauslaite on asennettu seinään tai kattoon kiinnitettyyn ilmavirran hajoitti-10 meen, joka muodostuu tuloputkesta ja hajoitinosasta. Lisäksi keksinnön kohteena on ilmavirran hajoitin, jossa menetelmää on sovellettu.The present invention relates to a method for measuring air flow by means of a measuring device, such as a measuring plate, a measuring ring or a measuring flange, which is held in a measuring position during measurement and which is mounted on a wall or ceiling mounted air flow diffuser consisting of an inlet pipe and a diffuser part. The invention further relates to an air flow diffuser in which the method has been applied.

Erilaisiin ilmastointikanaviin ja niiden osiin, kuten ilma-15 virran hajoittimiin, asennetaan yleisesti mittauslaitteita ilman tilavuusvirran mittaamiseksi. Yleisimmin käytetään mittausrenkaita, mittauslaippoja tai mittauslevyjä, jolloin mittaus perustuu siihen, että mitataan paine-ero mittauslaitteen molemmilla puolilla ja lasketaan sen perusteella 20 tilavuusvirta. Nykyisin nämä erilaiset mittauslaitteet asennetaan kiinteästi virtaukseen, jolloin ne haittaavat kaiken aikaa ilmavirtausta. Mittauselinten, varsinkin mittausren-kaiden virtaviivaisemmalla muotoilulla on pyritty tätä virtausvastusta pienentämään, mutta tietyn suuruinen vastus 25 joka tapauksessa tarvitaan, jotta paine-ero voitaisiin luotettavasti mitata.Measuring devices for measuring the volume flow of air are generally installed in various air conditioning ducts and their components, such as air-15 flow diffusers. Measuring rings, measuring flanges or measuring plates are most commonly used, in which case the measurement is based on measuring the pressure difference on both sides of the measuring device and calculating 20 volume flows on the basis of it. Today, these various measuring devices are fixedly installed in the flow, thus impeding the air flow all the time. The more streamlined design of the measuring elements, in particular the measuring rings, has sought to reduce this flow resistance, but a certain amount of resistance 25 is required in any case in order to be able to measure the pressure difference reliably.

Tämän keksinnön tarkoituksena on aikaansaada menetelmä, johon ei liity edellä mainittua ongelmaa. Keksinnön mukaiselle 30 menetelmälle on tunnusomaista se, että mittauslaitetta liikutetaan mittausasennon ja lepoasennon välillä tuloputken aksiaalisuunnassa, jolloin mittausasennossa mittauslaite on tuloputken päässä ennen hajoitinosaa, ja mittauksen jälkeen mittauslaitetta liikutetaan lepoasentoon ilmavirran tulo-35 suunnassa niin pitkälle, että ilmavirran normaali kulku ei häiriinny.The object of the present invention is to provide a method which does not have the above-mentioned problem. The method 30 according to the invention is characterized in that the measuring device is moved between the measuring position and the rest position in the axial direction of the inlet pipe, in which case the measuring device is at the end of the inlet pipe before the diffuser part, and after measuring the measuring device is moved to the rest position in the airflow

2 847582 84758

Keksinnön mukaiselle ilmavirran hajoittimelle, joka on asennettu huonetilan tai vastaavan seinään tai kattoon, johon kuuluu ilmavirran tuloputki sekä hajoitinosa, joka hajoittaa 5 ilmavirran huonetilaan eri suunnissa, on tunnusomaista se, että ilmavirran hajoittimeen on asennettu tuloputken aksiaa-lisuunnassa liikutettava ilmavirran mittauslaite, joka mit-tausasennossa sijaitsee tuloputken päässä ennen hajoitinosaa ja lepoasentoa varten mittauslaite on siirretty ilmavirran 10 tulosuunnassa hajoitinosan sisään niin pitkälle, että ilmavirran normaali kulku ei häiriinny.The airflow diffuser according to the invention mounted on a wall or ceiling of a room or the like, comprising an airflow inlet pipe and a diffuser section which diffuses the airflow into the room in different directions, is characterized in that the airflow diffuser is equipped with an axially movable in the background position is located at the end of the inlet pipe before the diffuser part and for the rest position the measuring device is moved in the inlet direction of the air flow 10 inside the diffuser part so far that the normal flow of air flow is not disturbed.

Keksinnön tärkeimpänä etuna voidaan pitää sitä, että ilmavirran mittauslaite ei normaalisti häiritse käytännöllisesti 15 katsoen lainkaan ilmavirtausta. Vasta kun halutaan suorittaa mittaus, siirretään mittauslaite mittausasentoon. Heti mittauksen jälkeen mittauslaite voidaan siirtää jälleen lepo-asentoon.The most important advantage of the invention is that the air flow measuring device does not normally disturb the air flow practically at all. Only when you want to perform a measurement is the measuring device moved to the measuring position. Immediately after the measurement, the measuring device can be moved to the rest position again.

20 Seuraavassa keksintöä selitetään yksityiskohtaisesti edullisten sovellutusmuotoesimerkkien avulla viittaamalla oheisiin piirustuksiin, joissaIn the following, the invention will be explained in detail by means of preferred embodiments with reference to the accompanying drawings, in which

Kuvio 1 esittää sivulta katsottuna ja osittain leikattuna 25 ilmavirran mittauslaitteella varustettu hajoitinta käyttö-asennossa .Figure 1 shows a side view and a partial section of a diffuser with an air flow measuring device 25 in the operating position.

Kuvio 2 esittää sivulta katsottuna ja osittain leikattuna ilmavirran mittauslaitteella varustettua hajoitinta mittaus-30 asennossa.Figure 2 shows a side view and a partial section of a diffuser with an air flow measuring device in the measuring-30 position.

Kuvio 3 esittää hajoitinta osittain leikattuna ja alapuolelta katsottuna.Figure 3 shows the diffuser in partial section and seen from below.

35 Kuviossa 1 on esitetty ilmavirran hajoitin 1, joka muodostuu tuloputkesta 2 ja hajoitinosasta 3. Hajoitin on tarkoitettu 3 84758 kiinnitettäväksi huoneen tai vastaavan kattoon tai seinään. Hajoitin hajoittaa tuloputkesta 2 tulevan ilmavirran qy ra-diaalisesti eri suuntiin, kuten nuolilla on osoitettu. Hajoitin on varustettu ilmavirran mittauslaitteella 4, 5, joka 5 muodostuu mittauslevystä 4 ja sen akselista 5. Akseli 5 on laakeroitu tuloputkessa olevaan tukirakenteeseen 6. Kuviossa 1 esitetyssä tilanteessa hajoitin on käyttöasennossa, eli mittauslevy 4 on hajoittimen pohjapeltiä 7 vasten, eikä siten haittaa normaalia virtausta.Figure 1 shows an air flow diffuser 1 consisting of an inlet pipe 2 and a diffuser part 3. The diffuser is intended to be mounted 3 84758 on the ceiling or wall of a room or the like. The diffuser diffuses the air flow qy from the inlet pipe 2 radially in different directions, as indicated by the arrows. The diffuser is provided with an air flow measuring device 4, 5, which 5 consists of a measuring plate 4 and its shaft 5. The shaft 5 is mounted on a support structure 6 in the inlet pipe. In the situation shown in Figure 1, the diffuser is in the operating position, i.e. the measuring plate 4 .

1010

Kuvion 2 esittämässä tilanteessa mittauslaite on siirretty tuloputken aksiaalisuunnassa mittausasentoon, jossa mittaus-levy 4 sijaitsee tuloputken 2 päässä ja jättää tuloputken ja ympyrämäisen mittauslevyn väliin rengasmaisen vapaan kulku-15 reitin ilmavirralle. Kuvioon 2 on merkitty myös letkut 8 ja 9 (kuviosta 1 jätetty selvyyden vuoksi pois), jotka paine-eroa ilmaisevaan elimeen 10. Letku 8 on yhteydessä onton akselin 5 kautta mittalevyn poistopuolelle, kun taas letku 9 on yhteydessä mittalevyn tulopuolelle. Tulo- ja poistopuolen 20 välinen paine-ero pm havaitaan paine-eromittarilla 10, kuten kuviossa 2 on esitetty. Paine-eron perusteella voidaan tavalliseen tapaan laskea ilman tilavuusvirta. Mittauksen jälkeen mittauslaite 4, 5 siirretään jälleen kuviossa 1 esitettyyn asentoon.In the situation shown in Fig. 2, the measuring device is moved in the axial direction of the inlet pipe to the measuring position, where the measuring plate 4 is located at the end of the inlet pipe 2 and leaves an annular free flow path 15 between the inlet pipe and the circular measuring plate. Also shown in Fig. 2 are hoses 8 and 9 (omitted from Fig. 1 for clarity) which are connected to the differential pressure sensing member 10. Hose 8 is connected via a hollow shaft 5 to the outlet side of the measuring plate, while hose 9 is connected to the inlet side of the measuring plate. The input 20 and the differential pressure between the outlet side of the PM detected differential pressure gauge 10, as shown in Figure 2. Based on the pressure difference, the volume flow of air can be calculated in the usual way. After the measurement, the measuring device 4, 5 is moved again to the position shown in Fig. 1.

2525

Se, miten mittauslaitetta käytännössä liikutetaan ja miten se pysyy esimerkiksi kuviossa 2 esitetyssä asennossaan, ei tässä tarkemmin selitetä, koska ratkaisut ovat alan ammattimiehelle helposti konstruoitavissa.How the measuring device is practically moved and how it remains, for example, in its position shown in Fig. 2 will not be explained in more detail here, because the solutions can be easily constructed by a person skilled in the art.

3030

Alan ammattimiehelle on niinikään selvää, että keksintö ei ole rajoittunut edelläesitettyihin sovellutusmuotoesimerk-keihin, vaan sitä voidaan vaihdella oheisten patenttivaatimusten puitteissa.It is also clear to a person skilled in the art that the invention is not limited to the above-mentioned exemplary embodiments, but can be varied within the scope of the appended claims.

Claims (2)

1. Förfarande för att mätä luftström (q* ) med hjälp av en mätningsanordning (4, 13), som en mätningsplatta, mätnings-ring eller mätfläns, vilken mätningsanordning hälls under mätningen i ett mätningsläge, och vilken mätningsanordning (4) är placerad tili en spridare av luftströmmen (q*) som är fäst vid en vägg eller ett tak och bestär av ett inlopps-rör (2) och spridardel (3),kännetecknat av att mätningsanordningen (4) rörs mellan mätningsläget och vilo-läget i inloppsrörets (2) axialriktning, varvid i mätningsläget mätningsanordningen (4) finns vid inloppsrörets (2) ända före spridardelen (3), och efter mätningen mätningsanordningen rörs tili viloläget i luftströmmens (q* ) inlopps-riktning sä längt, att luftsrömmens normala glng ej förstörs.A method for measuring air flow (q *) by means of a measuring device (4, 13), such as a measuring plate, measuring ring or measuring flange, which measuring device is poured during the measurement in a measuring position, and which measuring device (4) is placed therein. a spreader of the air stream (q *) which is attached to a wall or ceiling and consists of an inlet pipe (2) and spreader part (3), characterized in that the measuring device (4) is moved between the measuring position and the rest position of the inlet pipe ( 2) axial direction, in which in the measurement position the measuring device (4) is located at the inlet pipe (2) just before the spreader part (3), and after the measurement the measuring device is moved to the resting position in the inlet direction of the air flow (q *) so that the normal air flow tube is not normal. 2. Lufströmmsspridare, vilken är placerad pä en vägg eller ett tak av ett rum eller motsvarande och tili vilket hör en inloppsrör (2) för luftströmmen (q*) samt en spridardel (3) som sprider luftströmmen i olika riktningar, kännetecknad av att tili luftströmmens (q*) spridare (2, 3) är placerad en mätningsanordning (4) för luftströmmen som rörs i inloppsrörets (2) axialriktning, vilken anordning (4) i mätningsläget finns pä inloppsrörets (2) ända före spridardelen (3), och att för viloläget mätningsanordningen har flyttats i luftsrömmens inloppsriktning in i spridardelen (3) sä längt, ett luftsrömmen normala gäng ej förstörs.2. An air flow distributor, which is located on a wall or ceiling of a room or equivalent and belonging to an inlet pipe (2) for the air flow (q *) and a diffuser part (3) which spreads the air flow in different directions, characterized in that the air flow (q *) spreader (2, 3) is located a measuring device (4) for the air flow which is moved in the axial direction of the inlet pipe (2), which device (4) in the measuring position is on the inlet pipe (2) just before the spreader part (3), and that for the resting position the measuring device has been moved in the direction of the air inlet direction into the spreader part (3) for as long as a normal airflow is not destroyed.
FI900905A 1990-02-22 1990-02-22 FOERFARANDE FOER MAETNING AV LUFTSTROEM OCH LUFTSPRIDARE DAER FOERFARANDET HAR TILLAEMPATS. FI84758C (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FI900905A FI84758C (en) 1990-02-22 1990-02-22 FOERFARANDE FOER MAETNING AV LUFTSTROEM OCH LUFTSPRIDARE DAER FOERFARANDET HAR TILLAEMPATS.
DK028591A DK28591A (en) 1990-02-22 1991-02-19 METHOD OF MEASURING AN AIR FLOW AND AN AIR FLOW DISTRIBUTOR WHICH THE PROCEDURE IS USED FOR
SE9100506A SE9100506L (en) 1990-02-22 1991-02-20 METHOD FOR MEASURING THE AIR FLOWS AND AN AIR FLOW SPREADER WHEN THE METHOD APPLIES
NO91910685A NO910685L (en) 1990-02-22 1991-02-20 PROCEDURE FOR MEASURING AN AIR FLOW AND AN AIR FLOW SPREADER WHICH THE PROCEDURE IS USED.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI900905A FI84758C (en) 1990-02-22 1990-02-22 FOERFARANDE FOER MAETNING AV LUFTSTROEM OCH LUFTSPRIDARE DAER FOERFARANDET HAR TILLAEMPATS.
FI900905 1990-02-22

Publications (4)

Publication Number Publication Date
FI900905A0 FI900905A0 (en) 1990-02-22
FI900905A FI900905A (en) 1991-08-23
FI84758B true FI84758B (en) 1991-09-30
FI84758C FI84758C (en) 1992-01-10

Family

ID=8529931

Family Applications (1)

Application Number Title Priority Date Filing Date
FI900905A FI84758C (en) 1990-02-22 1990-02-22 FOERFARANDE FOER MAETNING AV LUFTSTROEM OCH LUFTSPRIDARE DAER FOERFARANDET HAR TILLAEMPATS.

Country Status (4)

Country Link
DK (1) DK28591A (en)
FI (1) FI84758C (en)
NO (1) NO910685L (en)
SE (1) SE9100506L (en)

Also Published As

Publication number Publication date
SE9100506D0 (en) 1991-02-20
NO910685L (en) 1991-08-23
FI900905A0 (en) 1990-02-22
SE9100506L (en) 1991-08-23
NO910685D0 (en) 1991-02-20
DK28591A (en) 1991-08-23
DK28591D0 (en) 1991-02-19
FI84758C (en) 1992-01-10
FI900905A (en) 1991-08-23

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Owner name: LAPINLEIMU OY