US3058491A - Arrangement for pressure-controlled quantity regulation in air ventilation installations - Google Patents

Arrangement for pressure-controlled quantity regulation in air ventilation installations Download PDF

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US3058491A
US3058491A US847291A US84729159A US3058491A US 3058491 A US3058491 A US 3058491A US 847291 A US847291 A US 847291A US 84729159 A US84729159 A US 84729159A US 3058491 A US3058491 A US 3058491A
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air
pressure
porous material
ventilating
arrangement
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US847291A
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Myhre Thore-Kristian
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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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F13/075—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser having parallel rods or lamellae directing the outflow, e.g. the rods or lamellae being individually adjustable
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/75—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity for maintaining constant air flow rate or air velocity

Definitions

  • the present invention relates to an arrangement for control of air quantities supplied by air ventilation installations, especially installations where several, separate rooms are supplied with air from a common source of compressed air.
  • the object of the present invention is to provide a simple and cheap control for installations of above defined type.
  • this aim is obtained thereby that the air path is blocked by a porous material which by increasing air pressure is compressed against a perforate staying member, so that the pore openings of the porous material become constricted and the resistance to the penetration of the air through said material increases.
  • the porous material is compressed and decreases the supply of air to the room in question in desired manner.
  • FIGURE 1 illustrates a section taken through a device of the invention.
  • FIGURE 2 shows a section taken along the line IIII on FIGURE 1.
  • FIG. 3A shows an uncompressed section of the porous material.
  • FiG. 3B shows a section of the porous material compressed by an increase in the difference between the ordinary ventilating air pressure on one side of it and the ordinary air pressure on the other side of it.
  • the drawing shows a usual air inlet valve 1, provided with ribs 2, 3, which guide the air current; and which is placed in a wall of a room connected with the ventilation installation.
  • a staying organ 5 provided with perforations or openings, which organ may consist of wire gauze, wire netting, expanded metal or the like.
  • Said staying organ also may consist of the porous material itself it the material itself is of a sufficiently staying nature.
  • an angle cc In order to increase the surf-ace area of this stay member it may have the form of two roof surfaces enclosing between them an angle cc. Said angle on may have any desired value, subject to the desired surface of area.
  • a porous material 6 At the pressure side of the member 5, or upstream with respect to the flow of ventilating air through channel 4, is provided a porous material 6 through which the ventilating air flows.
  • the porous material 6 may consist of e.g. foam plastics, foam rubber, a porous mass of felt, or the like, placed in one or several layers, all in accordance with the penetration resistance which it is desired to obtain.
  • the desired control of the amount of air supplied to the room is obtained even if the pressures at each side of the porous material varies.
  • the normal condition of the porous material 6 is shown in FIG. 3A, and the compressed condition of the porous material is shown in FIG. 3B.
  • the increase in pressure will at least partially compress the porous material as shown in FIG. 3B. This decreases the size of the pore openings in the porous material, which restricts the flow of ventilating air through the porous material to the room, thus automatically controlling the flow of ventilating air to the room.
  • an air ventilating installation including an air channel in which ventilating air under pressure is supplied to a room to be ventilated, a perforated stay mounted in the channel and extending across the flow area thereof and through which the ventilating air in the channel must flow, and a covering of an air-flow-controlling porous material covering the pressure side of the stay and through which the ventilating air flowing in the channel to the room must flow, the covering of porous material on the stay having constrictible pore openings for the flow of ventilating air therethrough and being compressible in response to an increase in the difierence between the ordinary ventilating air pressure in the channel on the pressure side of the covering of porous material and the ordinary air pressure in the room, and said covering of porous material on the stay having a structure such that the pore openings therein are constricted and the ventilating air flow therethrough reduced when the covering of porous material is compressed.
  • an air ventilating installation including an air channel in which ventilating .air under pressure is supplied to a room to be ventilated, a perforated stay mounted in the channel and extending across the flow area thereof and through which the ventilating air in the channel must flow, and a layer of an air-flow-controlling porous material covering the pressure side of the stay and through which the ventilating air flowing in the channel to the room must flow, the layer of porous material 0n the stay having constrictible pore openings for the flow of ventilating air therethrough and being compressible in response to an increase in the difierence between the ordinary ventilating air pressure in the channel on the pressure side of the layer of porous material and the ordinary air pressure in the room, and said layer of porous material on the stay having a structure such 7 3 4 that the pore openings therein are constricted and the 1,232,456 Bliss July 3, 1917 ventilating air flow therethrough reduced when the layer 1,572,469 De Lin Feb.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)

Description

1962 THORE-KRISTIAN MYHRE 3,058,491
ARRANGEMENT ,FOR PRESSURE-CONTROLLED QUANTITY REGULATION IN AIR VENTILATION INSTALLATIONS Filed Oct. 19, 1959 1 j g -:a A 1*"? Q 1 E v 4 Q 1 #1:: Q I d 5 :Q --::a
Q A .A, 5; i! a i INVENTQR THORE KRISTIAN MYHRE ATTORNEYS A 3,058,4. Patented Oct. 16, 1962 3,058,491 ARRANGEMENT FOR PRESSURE-CONTROLLED QUANTITY REGULATION IN AIR VENTILA- TION INSTALLATIONS Thore-Kristian Myhre, General Birchsgate 30, Oslo, Norway Filed Oct. 19, 1959, Ser. No. 847,291 Claims priority, application Norway Oct. 21, 1958 2 Claims. (Cl. 13841) The present invention relates to an arrangement for control of air quantities supplied by air ventilation installations, especially installations where several, separate rooms are supplied with air from a common source of compressed air.
In an installation of the above mentioned type unbalance will occur if the pressure prevailing in any one of the rooms suddenly drops, e.g. because doors or windows thereof are opened. If this happens a disproportional great portion of the air is supplied to the roomin which low pressure occurs, and the other rooms of the installation are supplied with less air than calculated.
The object of the present invention is to provide a simple and cheap control for installations of above defined type.
According to the invention this aim is obtained thereby that the air path is blocked by a porous material which by increasing air pressure is compressed against a perforate staying member, so that the pore openings of the porous material become constricted and the resistance to the penetration of the air through said material increases. Thus, if the pressure difierence between the pressure source and the room to be supplied with air increases, the porous material is compressed and decreases the supply of air to the room in question in desired manner. By suitable choice of the thickness and penetration properties of the porous material it is possible to secure an approximately uniform admission of air to the several rooms connected in an installation of the defined type, independent of the pressure prevailing in each room.
In addition to the advantages mentioned above there is obtained dampening of sounds, which may accompany the air stream due to the shape of the air channel, since such sounds are absorbed by the porous material. Moreover a certain filtering action is obtained.
An embodiment of the invention is described below with reference to the annexed drawing.
FIGURE 1 illustrates a section taken through a device of the invention.
FIGURE 2 shows a section taken along the line IIII on FIGURE 1.
FIG. 3A shows an uncompressed section of the porous material.
FiG. 3B shows a section of the porous material compressed by an increase in the difference between the ordinary ventilating air pressure on one side of it and the ordinary air pressure on the other side of it.
The drawing shows a usual air inlet valve 1, provided with ribs 2, 3, which guide the air current; and which is placed in a wall of a room connected with the ventilation installation. To the valve 1 is admitted ventilating air under pressure through a channel 4. At the pressure side, in front of the guide ribs 2, is provided a staying organ 5 provided with perforations or openings, which organ may consist of wire gauze, wire netting, expanded metal or the like. Said staying organ also may consist of the porous material itself it the material itself is of a sufficiently staying nature. In order to increase the surf-ace area of this stay member it may have the form of two roof surfaces enclosing between them an angle cc. Said angle on may have any desired value, subject to the desired surface of area. At the pressure side of the member 5, or upstream with respect to the flow of ventilating air through channel 4, is provided a porous material 6 through which the ventilating air flows. The porous material 6 may consist of e.g. foam plastics, foam rubber, a porous mass of felt, or the like, placed in one or several layers, all in accordance with the penetration resistance which it is desired to obtain. By correct choice of surface area, thickness and porous properties of the material 6 the desired control of the amount of air supplied to the room is obtained even if the pressures at each side of the porous material varies. The normal condition of the porous material 6 is shown in FIG. 3A, and the compressed condition of the porous material is shown in FIG. 3B. If the pressure difference between the ordinary ventilating air pressure in channel 4 and the ordinary air pressure in the room applied with the ventilating air increases, the increase in pressure will at least partially compress the porous material as shown in FIG. 3B. This decreases the size of the pore openings in the porous material, which restricts the flow of ventilating air through the porous material to the room, thus automatically controlling the flow of ventilating air to the room.
I claim:
1. In an air ventilating installation including an air channel in which ventilating air under pressure is supplied to a room to be ventilated, a perforated stay mounted in the channel and extending across the flow area thereof and through which the ventilating air in the channel must flow, and a covering of an air-flow-controlling porous material covering the pressure side of the stay and through which the ventilating air flowing in the channel to the room must flow, the covering of porous material on the stay having constrictible pore openings for the flow of ventilating air therethrough and being compressible in response to an increase in the difierence between the ordinary ventilating air pressure in the channel on the pressure side of the covering of porous material and the ordinary air pressure in the room, and said covering of porous material on the stay having a structure such that the pore openings therein are constricted and the ventilating air flow therethrough reduced when the covering of porous material is compressed.
2. In an air ventilating installation including an air channel in which ventilating .air under pressure is supplied to a room to be ventilated, a perforated stay mounted in the channel and extending across the flow area thereof and through which the ventilating air in the channel must flow, and a layer of an air-flow-controlling porous material covering the pressure side of the stay and through which the ventilating air flowing in the channel to the room must flow, the layer of porous material 0n the stay having constrictible pore openings for the flow of ventilating air therethrough and being compressible in response to an increase in the difierence between the ordinary ventilating air pressure in the channel on the pressure side of the layer of porous material and the ordinary air pressure in the room, and said layer of porous material on the stay having a structure such 7 3 4 that the pore openings therein are constricted and the 1,232,456 Bliss July 3, 1917 ventilating air flow therethrough reduced when the layer 1,572,469 De Lin Feb. 9, 1926 of porous material is compressed. 1,896,700 Cross Feb. 7, 1933 2,081,553 Neeson May 25, 1937 References Cited in the file of this patent 5 2,611 8215 PM Nov. 18 1952 UNITED STATES PATENTS 2,936,854 Lucas May 17, 1960 1,121,700 Wiedmann Dec. 22, 1914 2,991,843 Bell y 1 1961 1,216,685 Harding Feb. 20, 19 17
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629999A (en) * 1969-08-20 1971-12-28 Becton Dickinson Co Clean air target device
US3766946A (en) * 1968-09-25 1973-10-23 Braun Ag Flame adjusting device for gas lighters
US5147243A (en) * 1991-05-10 1992-09-15 Carrier Corporation Air terminal apparatus
US20050051382A1 (en) * 2003-09-10 2005-03-10 Voss Automotive Gmbh: Pneumatic blow-off silencer
US20070178827A1 (en) * 2006-01-23 2007-08-02 Erni Thomas W Insulated housing apparatus for use with an attic fan
CN105270636A (en) * 2014-07-21 2016-01-27 波音公司 Air diffuser systems, methods, and apparatuses
US11884403B2 (en) 2020-09-09 2024-01-30 The Boeing Company Air distribution nozzles, aircraft that include air distribution nozzles, and methods of utilizing air distribution nozzles
US11958616B2 (en) 2020-09-09 2024-04-16 The Boeing Company Air distribution nozzles, aircraft that include air distribution nozzles, and methods of utilizing air distribution nozzles
US12006043B2 (en) 2021-10-22 2024-06-11 The Boeing Company Aircraft environmental control systems including airflow interleavers and methods for controlling airflow within aircraft

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1121700A (en) * 1911-03-25 1914-12-22 George J Wiedmann Pressure-reducer.
US1216685A (en) * 1914-08-05 1917-02-20 Joseph W Harding Ventilating apparatus.
US1232456A (en) * 1905-01-06 1917-07-03 Us Light & Heat Corp Relay.
US1572469A (en) * 1925-09-28 1926-02-09 Holland Furnace Co Liquid-flow-regulating valve
US1896700A (en) * 1928-09-10 1933-02-07 Tuttle Register Dust Catcher C Dust collector
US2081553A (en) * 1933-02-13 1937-05-25 Baldwin Southwark Corp Air conditioning apparatus
US2618215A (en) * 1943-07-01 1952-11-18 Fitt Thomas Charles Ventilating device and like air supply and distributing device
US2936854A (en) * 1956-10-31 1960-05-17 George K Le Brun Filter
US2991843A (en) * 1958-12-30 1961-07-11 Safeguard Corp Ventilator construction

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1232456A (en) * 1905-01-06 1917-07-03 Us Light & Heat Corp Relay.
US1121700A (en) * 1911-03-25 1914-12-22 George J Wiedmann Pressure-reducer.
US1216685A (en) * 1914-08-05 1917-02-20 Joseph W Harding Ventilating apparatus.
US1572469A (en) * 1925-09-28 1926-02-09 Holland Furnace Co Liquid-flow-regulating valve
US1896700A (en) * 1928-09-10 1933-02-07 Tuttle Register Dust Catcher C Dust collector
US2081553A (en) * 1933-02-13 1937-05-25 Baldwin Southwark Corp Air conditioning apparatus
US2618215A (en) * 1943-07-01 1952-11-18 Fitt Thomas Charles Ventilating device and like air supply and distributing device
US2936854A (en) * 1956-10-31 1960-05-17 George K Le Brun Filter
US2991843A (en) * 1958-12-30 1961-07-11 Safeguard Corp Ventilator construction

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766946A (en) * 1968-09-25 1973-10-23 Braun Ag Flame adjusting device for gas lighters
US3629999A (en) * 1969-08-20 1971-12-28 Becton Dickinson Co Clean air target device
US5147243A (en) * 1991-05-10 1992-09-15 Carrier Corporation Air terminal apparatus
US20050051382A1 (en) * 2003-09-10 2005-03-10 Voss Automotive Gmbh: Pneumatic blow-off silencer
US20070178827A1 (en) * 2006-01-23 2007-08-02 Erni Thomas W Insulated housing apparatus for use with an attic fan
US7731477B2 (en) 2006-01-23 2010-06-08 Erni Thomas W Insulated housing apparatus for use with an attic fan
CN105270636A (en) * 2014-07-21 2016-01-27 波音公司 Air diffuser systems, methods, and apparatuses
US20160194086A1 (en) * 2014-07-21 2016-07-07 The Boeing Company Air diffuser systems, methods, and apparatuses
US10081429B2 (en) * 2014-07-21 2018-09-25 The Boeing Company Air diffuser systems, methods, and apparatuses
US11884403B2 (en) 2020-09-09 2024-01-30 The Boeing Company Air distribution nozzles, aircraft that include air distribution nozzles, and methods of utilizing air distribution nozzles
US11958616B2 (en) 2020-09-09 2024-04-16 The Boeing Company Air distribution nozzles, aircraft that include air distribution nozzles, and methods of utilizing air distribution nozzles
US12006043B2 (en) 2021-10-22 2024-06-11 The Boeing Company Aircraft environmental control systems including airflow interleavers and methods for controlling airflow within aircraft

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