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JP2005308606A - Air flow meter in fan room of air conditioner - Google Patents

Air flow meter in fan room of air conditioner Download PDF

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Publication number
JP2005308606A
JP2005308606A JP2004127679A JP2004127679A JP2005308606A JP 2005308606 A JP2005308606 A JP 2005308606A JP 2004127679 A JP2004127679 A JP 2004127679A JP 2004127679 A JP2004127679 A JP 2004127679A JP 2005308606 A JP2005308606 A JP 2005308606A
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Japan
Prior art keywords
air
fan
differential pressure
air conditioner
inlet cone
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Pending
Application number
JP2004127679A
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Japanese (ja)
Inventor
Yasushi Murata
寧 村田
Hideyuki Sato
秀行 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinko Electric Industries Co Ltd
Sinko Industries Ltd
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Shinko Electric Industries Co Ltd
Sinko Industries Ltd
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Priority to JP2004127679A priority Critical patent/JP2005308606A/en
Publication of JP2005308606A publication Critical patent/JP2005308606A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/301—Pressure

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Volume Flow (AREA)

Abstract

【課題】
プラグファンやリミットロードファン等の空気を遠心力で外側に飛ばして送風する遠心ファンにおいても、的確にファンの送風量を測定できる空気調和機の風量計を提供する。
【解決手段】
遠心ファンを用いた空気調和機のファン室であって、該ファンの空気吸引側に配したくびれ部を有するスカート状のインレットコーンを設け、該インレットコーンのくびれ部の最小内径の壁面に一方の差圧検出孔を設け、前記インレットコーンの空気吸引側開口に連接した給気室の所望位置に他方の差圧検出孔を設け、両差圧検出孔に差圧計を配管を介して接続し、該差圧計の目盛りを風量に換算した目盛りとしたことを特徴とした空気調和機の風量計。
【選択図】図３
【Task】
Provided is an air conditioner for an air conditioner that can accurately measure the amount of air blown from a fan such as a plug fan or a limit load fan, even in a centrifugal fan that blows air outside by centrifugal force.
[Solution]
A fan chamber of an air conditioner using a centrifugal fan, wherein a skirt-shaped inlet cone having a constricted portion disposed on the air suction side of the fan is provided, and one of the walls of the constricted portion of the inlet cone has a minimum inner diameter. A differential pressure detection hole is provided, the other differential pressure detection hole is provided at a desired position of the air supply chamber connected to the air suction side opening of the inlet cone, and a differential pressure gauge is connected to both differential pressure detection holes via a pipe, An air conditioner for an air conditioner, wherein the scale of the differential pressure gauge is a scale converted to an air volume.
[Selection] Figure 3

Description

本発明は、空気調和機の風量計、特に、プラグファンやリミットロードファン等の遠心ファンを用いた空気調和機の風量計の技術分野に属する。   The present invention belongs to the technical field of an air flow meter for an air conditioner, particularly an air flow meter for an air conditioner using a centrifugal fan such as a plug fan or a limit load fan.

従来より、空気調和機の風量は、通常、ファンの送風量とファンの駆動負荷電流とに相関関係があることから、負荷電流の値から空気調和機の送風量を検出していた。このことは、例えば空気を羽根で押し出す標準的なシロッコファンにおいては、図１のグラフに示すように、ファンの送風量を増やせばファンの駆動負荷電流も増大する相関関係にある。   Conventionally, since the air volume of an air conditioner normally has a correlation between the air flow rate of the fan and the drive load current of the fan, the air volume of the air conditioner has been detected from the value of the load current. For example, in a standard sirocco fan that pushes out air using blades, as shown in the graph of FIG.

ところで、近時、空気調和機においては、プラグファンやリミットロードファン等の空気を遠心力で外側に飛ばして送風する遠心ファンを使用することが多くなっている。これらプラグファンやリミットロードファン等の遠心ファンにおいては、空気を遠心力で外側に飛ばして送風することから、例えば、図２のグラフに示しように、標準的なプラグファンを使用した場合、モーターの回転数を９８５rpm前後に設定し、日本工業規格JIS-B8330に準じた試験をしたものであるが、送風量を30000ｍ3／ｈで駆動負荷電流は28.5Ａ程度で、これ以上に風量を増やしても負荷電流はほぼ29.3Ａをピークとしてこれ以上には増えず、送風量が45000ｍ3／ｈ付近では逆に低減して28Ａ程度である。したがって、プラグファンやリミットロードファン等においては、この特性を生かして効率が良い送風量が45000ｍ3／ｈ付近で使用することが多い。
この場合に、従来のように、ファンの駆動負荷電流でファンの送風量を測定すると、例えば、２８Ａに対応する風量は、28000ｍ3／ｈと45000ｍ3／ｈとの２つの値が検出され誤差を生じるという問題点があった。 By the way, recently, in an air conditioner, a centrifugal fan that blows air by blowing air outside by a centrifugal force such as a plug fan and a limit load fan is often used. In these centrifugal fans such as plug fans and limit load fans, air is blown outside by centrifugal force, so that, for example, when a standard plug fan is used as shown in the graph of FIG. The number of rotations was set to around 985 rpm and tested in accordance with Japanese Industrial Standard JIS-B8330. The air flow rate was 30000 m 3 / h, the drive load current was about 28.5 A, and the air volume was increased further. However, the load current does not increase any more, peaking at about 29.3A, and decreases to about 28A when the air flow rate is around 45000m 3 / h. Therefore, plug fans, limit load fans, and the like are often used in the vicinity of 45000 m 3 / h with an efficient air flow rate utilizing this characteristic.
In this case, when the air flow rate of the fan is measured with the fan drive load current as in the conventional case, for example, the air flow rate corresponding to 28A is detected as two values of 28000 m 3 / h and 45000 m 3 / h. There was a problem of producing.

本発明は、従来の前記問題点に鑑みてなされたもので、プラグファンやリミットロードファン等の空気を遠心力で外側に飛ばして送風する遠心ファンにおいても、的確にファンの送風量を測定できる空気調和機の風量計を提供しようとするものである。   The present invention has been made in view of the above-described problems of the related art, and even in a centrifugal fan that blows air by centrifugal force such as a plug fan and a limit load fan, the amount of air blown from the fan can be accurately measured. It is intended to provide an air flow meter for an air conditioner.

上記課題を解決するために、請求項１の発明は、遠心ファンを用いた空気調和機のファン室であって、該ファンの空気吸引側に配したくびれ部を有するスカート状のインレットコーンを設け、該インレットコーンのくびれ部の最小内径の壁面に一方の差圧検出孔を設け、前記インレットコーンの空気吸引側開口に連接した給気室の所望位置に他方の差圧検出孔を設け、両差圧検出孔に差圧計を配管を介して接続し、該差圧計の目盛りを風量に換算した目盛りとしたことを特徴とした空気調和機の風量計である。   In order to solve the above-mentioned problems, the invention of claim 1 is a fan chamber of an air conditioner using a centrifugal fan, and is provided with a skirt-shaped inlet cone having a constricted portion arranged on the air suction side of the fan. One differential pressure detection hole is provided in the wall surface of the minimum inner diameter of the constricted portion of the inlet cone, and the other differential pressure detection hole is provided at a desired position of the air supply chamber connected to the air suction side opening of the inlet cone. An air flow meter for an air conditioner characterized in that a differential pressure gauge is connected to a differential pressure detection hole through a pipe, and the scale of the differential pressure gauge is a scale converted to an air volume.

本発明によれば、空気調和機のプラグファンやリミットロードファン等の遠心ファンの空気吸引側に配したくびれ部を有するスカート状のインレットコーンの形状を利用し、このインレットコーンに差圧計の検出孔を設けて流量計としたもので、遠心ファンにおいても的確にファンの送風量を測定できるという効果が得られる。   According to the present invention, the shape of a skirt-like inlet cone having a constricted portion arranged on the air suction side of a centrifugal fan such as a plug fan or a limit load fan of an air conditioner is used, and a differential pressure gauge is detected on the inlet cone. The flow meter is provided with a hole, and an effect that the amount of air blown from the fan can be accurately measured even in a centrifugal fan can be obtained.

本発明の好適な実施例を図面に沿って説明するが、図３は本実施例の全体の概略を示すもので、ファン室１は、通常、従来例の如く熱交換室等の給気室２に連接して設けられ、ファン室１には遠心型送風機であるプラグファン３が設けられ、プラグファン３の前面にインレットコーン４がファン室１と空気吸引側の給気室２と隔てる区枠５に固定されている。
インレットコーン４はスカート状で、図４に示すように、くびれ部４１を有しており、このインレットコーン４のくびれ部４１の最小内径aの壁面に一方の差圧検出孔４２を設け、前記インレットコーン４の空気吸引側開口４３に連接した給気室２側の区枠５の壁面５１に他方の差圧検出孔５２を設け、両差圧検出孔４２、５２に差圧計６を配管６１．６２を介して接続してある。即ち、差圧計６は、差圧検出孔４２での静圧Ａと差圧検出孔５２での静圧Ｂとの差圧（Ｂ−Ａ）を測定して風量換算することになる。 A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 3 shows an overall outline of the present embodiment, and the fan chamber 1 is usually an air supply chamber such as a heat exchange chamber as in the conventional example. The fan chamber 1 is provided with a plug fan 3 which is a centrifugal blower, and an inlet cone 4 is separated from the fan chamber 1 and the air suction chamber 2 on the front side of the plug fan 3. It is fixed to the frame 5.
The inlet cone 4 has a skirt shape, and has a constricted portion 41 as shown in FIG. 4. One differential pressure detection hole 42 is provided on the wall surface of the minimum inner diameter a of the constricted portion 41 of the inlet cone 4. the other differential pressure Deana 52 provided on the wall 51 of the air supply chamber 2 side of the ward frame 5 which is connected to the air suction side opening 43 of the inlet cone 4, pipes differential pressure gauge 6 on both a differential pressure Deana 42, 52 61 .62 is connected. That is, the differential pressure gauge 6 measures the differential pressure (B−A) between the static pressure A in the differential pressure detection hole 42 and the static pressure B in the differential pressure detection hole 52 and converts the air volume.

本実施例では、くびれ部４１に設けた差圧検出孔４２は、図５に示すように、左右前後の４箇所に検出孔42a〜dを設け、これらを連接配管611でつないで配管６１に接続して安定した圧力値を検出しているが、勿論、差圧検出孔４２は一箇所でもよい。
ここでインレットコーン４のくびれ部４１の形状を、図４で説明すると、くびれ部４１は空気出口の近傍に位置し、所定の曲率半径Ｒを有していて最小内径aとなり、空気出口開口４４の内径ｂより若干小さく、空気吸引側開口４３の内径ｃは大きく開口しており急激に絞られてそのくびれ部の内径aに延びており、差圧が検出されやすい形状となっている。 In the present embodiment, the differential pressure detection hole 42 provided in the constricted portion 41 is provided with detection holes 42a to 42d at four places on the left and right and front and rear, as shown in FIG. Although connected and detects a stable pressure value, of course, the differential pressure detection hole 42 may be provided at one location.
Here, the shape of the constricted portion 41 of the inlet cone 4 will be described with reference to FIG. 4. The constricted portion 41 is located in the vicinity of the air outlet, has a predetermined radius of curvature R, has a minimum inner diameter a, and has an air outlet opening 44. Is slightly smaller than the inner diameter b of the air suction side, and the inner diameter c of the air suction side opening 43 is large and is sharply squeezed to extend to the inner diameter a of the constricted portion so that the differential pressure is easily detected.

次ぎに、差圧と風量換算について説明すると、空気調和機の場合に静圧Ａと静圧Ｂとは組込器機による機内圧損の影響を受けるが、実際には機内損失が変化しても風量が変化しない限り影響はほとんど受けない。本実施例での差圧と風量との関係を図６のグラフに示すが、風量の測定はJISB8330に準拠して測定し、差圧はコスモ社製デジタルマノメータDM-3500を用いて測定した。
図６において、プラグファン３の吸込み静圧が変化しても、差圧（Ｂ−Ａ）に大きな変化はなく、風量が増加するに従って差圧（Ｂ−Ａ）も増加し、例えば、風量300ｍ3／ｈでは差圧４Ｐa、風量1000ｍ3／ｈでは差圧40Ｐa、風量1780ｍ3／ｈでは差圧98Ｐaと増加し、極大値がなく誤った値を検出することがない。この図６にしたがって、差圧計に風量レンジ目盛７を付ければプラグファン３における風量を直読できるようになる。
なお、本発明の特徴を損うものでなければ、上記の実施例に限定されるものでないことは勿論である。 Next, differential pressure and air volume conversion will be described. In the case of an air conditioner, static pressure A and static pressure B are affected by in-machine pressure loss due to the built-in equipment, but in actuality even if the in-machine loss changes, the air volume As long as there is no change, it is hardly affected. The relationship between the differential pressure and the air volume in this example is shown in the graph of FIG. 6. The air volume was measured according to JISB8330, and the differential pressure was measured using a digital manometer DM-3500 manufactured by Cosmo.
In FIG. 6, even if the suction static pressure of the plug fan 3 changes, the differential pressure (BA) does not change greatly, and the differential pressure (BA) increases as the air volume increases. 3 / h at a differential pressure 4 Pa, flow rate 1000 m 3 / h at a differential pressure 40 Pa, increases the air volume 1780 m 3 / h at a differential pressure 98Pa, is not to detect the value maximum value is wrong no. According to FIG. 6, if the air flow range scale 7 is attached to the differential pressure gauge, the air flow in the plug fan 3 can be directly read.
Needless to say, the present invention is not limited to the above-described embodiments as long as the features of the present invention are not impaired.

従来のシロッコファンによる空気調和機の風量と駆動負荷電流との関係のグラフの図である。It is a figure of the graph of the relationship between the air volume of an air conditioner by the conventional sirocco fan, and drive load current. 従来のプラグファンによる空気調和機の風量と駆動負荷電流との関係のグラフの図である。It is a figure of the graph of the relationship between the air volume of an air conditioner by the conventional plug fan, and drive load current. 本発明の実施例の全体の概略を示す断面図である。It is sectional drawing which shows the outline of the whole Example of this invention. 本発明の実施例のインレットコーンの断面図である。It is sectional drawing of the inlet cone of the Example of this invention. 図４のインレットコーンと差圧検出孔を示す分解斜視図である。It is a disassembled perspective view which shows the inlet cone and differential pressure | voltage detection hole of FIG. 本発明の実施例の差圧と風量との関係のグラフの図である。It is a figure of the graph of the relationship between the differential pressure | voltage and the air volume of the Example of this invention.

符号の説明Explanation of symbols

１…ファン室、２…給気室、
３…プラグファン、
４…インレットコーン、４１…くびれ部、４２,42a〜d…差圧検出孔、
４３…空気吸引側開口、４４…出口開口、
５…区枠、５１…壁面、５２…差圧検出孔、
６…差圧計、61,62…配管、611…連接配管、
７…目盛板、 1 ... Fan room, 2 ... Air supply room,
3 ... Plug fan,
4 ... Inlet cone, 41 ... Constriction, 42, 42a-d ... Differential pressure detection hole,
43 ... Air suction side opening, 44 ... Outlet opening,
5 ... Section frame, 51 ... Wall surface, 52 ... Differential pressure detection hole,
6 ... differential pressure gauge, 61, 62 ... piping, 611 ... articulated piping,
7 ... Scale plate,

Claims (1)

遠心ファンを用いた空気調和機のファン室であって、該ファンの空気吸引側に配したくびれ部を有するスカート状のインレットコーンを設け、該インレットコーンのくびれ部の最小内径の壁面に一方の差圧検出孔を設け、前記インレットコーンの空気吸引側開口に連接した給気室の所望位置に他方の差圧検出孔を設け、両差圧検出孔に差圧計を配管を介して接続し、該差圧計の目盛りを風量に換算した目盛りとしたことを特徴とした空気調和機の風量計。   A fan chamber of an air conditioner using a centrifugal fan, wherein a skirt-shaped inlet cone having a constricted portion arranged on the air suction side of the fan is provided, and one of the walls of the constricted portion of the inlet cone has a minimum inner diameter. A differential pressure detection hole is provided, the other differential pressure detection hole is provided at a desired position of the air supply chamber connected to the air suction side opening of the inlet cone, and a differential pressure gauge is connected to both differential pressure detection holes via a pipe, An air volume meter for an air conditioner, wherein the scale of the differential pressure gauge is a scale converted to an air volume.
JP2004127679A 2004-04-23 2004-04-23 Air flow meter in fan room of air conditioner Pending JP2005308606A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015212610A (en) * 2014-04-18 2015-11-26 ダイキン工業株式会社 Air conditioner
DE102012216902B4 (en) * 2011-10-26 2016-03-24 Ford Global Technologies, Llc Method and arrangement for characterizing the air flow rate of a ventilated brake disk
JP2016164543A (en) * 2015-06-16 2016-09-08 山洋電気株式会社 measuring device
EP3219992A1 (en) * 2016-03-14 2017-09-20 Soler & Palau Research, S.L. Fan unit
US9857209B2 (en) 2015-03-06 2018-01-02 Sanyo Denki Co., Ltd. Measurement device for measuring airflow volume and ventilation resistance of wind-blowing apparatus
CN109520572A (en) * 2018-11-09 2019-03-26 珠海格力电器股份有限公司 Enthalpy difference chamber circulating air volume measuring device and initial opening method of nozzle thereof
FR3156520A1 (en) * 2023-12-12 2025-06-13 Electricite De France Device and method for measuring an air flow in an air passage opening

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6227620A (en) * 1985-07-26 1987-02-05 金星電線株式会社 Direct reading airflow meter
JPH07151093A (en) * 1993-05-17 1995-06-13 Brod & Mcclung Pace Co Ventilation mechanism and blower
JPH08121381A (en) * 1994-10-20 1996-05-14 Hitachi Ltd Ventilation system for vehicles
JPH10253410A (en) * 1997-03-11 1998-09-25 Omron Corp Flowmeter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6227620A (en) * 1985-07-26 1987-02-05 金星電線株式会社 Direct reading airflow meter
JPH07151093A (en) * 1993-05-17 1995-06-13 Brod & Mcclung Pace Co Ventilation mechanism and blower
JPH08121381A (en) * 1994-10-20 1996-05-14 Hitachi Ltd Ventilation system for vehicles
JPH10253410A (en) * 1997-03-11 1998-09-25 Omron Corp Flowmeter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012216902B4 (en) * 2011-10-26 2016-03-24 Ford Global Technologies, Llc Method and arrangement for characterizing the air flow rate of a ventilated brake disk
JP2015212610A (en) * 2014-04-18 2015-11-26 ダイキン工業株式会社 Air conditioner
US9857209B2 (en) 2015-03-06 2018-01-02 Sanyo Denki Co., Ltd. Measurement device for measuring airflow volume and ventilation resistance of wind-blowing apparatus
JP2016164543A (en) * 2015-06-16 2016-09-08 山洋電気株式会社 measuring device
EP3219992A1 (en) * 2016-03-14 2017-09-20 Soler & Palau Research, S.L. Fan unit
CN109520572A (en) * 2018-11-09 2019-03-26 珠海格力电器股份有限公司 Enthalpy difference chamber circulating air volume measuring device and initial opening method of nozzle thereof
FR3156520A1 (en) * 2023-12-12 2025-06-13 Electricite De France Device and method for measuring an air flow in an air passage opening
WO2025125391A1 (en) * 2023-12-12 2025-06-19 Electricite De France Device and method for measuring an air flow rate in an air passage opening

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