EP0578697A1 - Systeme de ventilation a rendement energetique eleve - Google Patents

Systeme de ventilation a rendement energetique eleve

Info

Publication number
EP0578697A1
EP0578697A1 EP92907658A EP92907658A EP0578697A1 EP 0578697 A1 EP0578697 A1 EP 0578697A1 EP 92907658 A EP92907658 A EP 92907658A EP 92907658 A EP92907658 A EP 92907658A EP 0578697 A1 EP0578697 A1 EP 0578697A1
Authority
EP
European Patent Office
Prior art keywords
air
bellows
heat
building
moving means
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP92907658A
Other languages
German (de)
English (en)
Inventor
Anthony Jack Beck
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0578697A1 publication Critical patent/EP0578697A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/045—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms with in- or outlet valve arranged in the plate-like pumping flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/02—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • 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]
    • Y02B30/56—Heat recovery units

Definitions

  • This invention relates to ventilation systems which provide energy-efficient ventilation for buildings having an internal temperature maintained at a temperature higher than ambient.
  • a ventilation system for recovering heat from stale air extracted from a building having an internal temperature maintained at higher than ambient, the system comprising first air moving means for extracting stale air from the building, second air moving means for intro ⁇ ducing fresh air into the building, and a heat-exchanger arranged to transfer heat from the extracted stale air to the cooler incoming fresh air.
  • the air moving means are constituted by positive displacement bellows arranged to provide a steady air flow, and the heat-exchanger by a counterflow, high pressure drop heat-exchanger.
  • the air moving means are located between the heat-exchanger and its connections to the interior to be ventilated, such that the enthalpy rise in the air moving means increases the temperature gradient across the heat-exchanger and increases the rate of heat- exchange between the two air flows.
  • the ventilation system according to the present invention thus affords an energy-efficient system which is both silent and compact.
  • Figure 1 is a side elevation, partly in section, of a ventilation system according to the invention
  • Figure 2 is a section on the line II-II of Fig.
  • Figure 3 is a detail end elevation of part of a bellows plate shown in Fig. 1;
  • Figure 4 is an elevation, partly in section, of a combined bellows device, which may be substituted for the separate bellows devices of the system of Figs. 1 to 3;
  • Figure 5 is a section on the line V-V of Fig. 4.
  • FIG. 6 is a diagrammatic developed perspective view of the cam channel shown in Fig. 4.
  • a heat-exchange ventilation system 10 for use in a room of a house, an office or factory comprises a stale air interior exhaust duct 12, an exhaust air bellows device 14, an exhaust connection duct 16, heat exchanger 18, external exhaust duct 20, fresh air intake duct 22, fresh air connection duct 24, intake bellows device 26 and internal fresh air output duct 28.
  • the exhaust air bellows device 14 will now be des ⁇ cribed as typical of both the exhaust and intake devices 14 and 26, and comprises a casing 30 connected to the ducts 12,16 and housing an electric motor 32 arranged to drive, through a worm gear, a camshaft 34 on which is mounted a cam plate 36 having a profiled periphery.
  • Spring-loaded cam-following rollers 38 are each mounted on the distal end of a stem 40 which is loosely held in a guide arm 42 and pivotally-connected at its proximal end to an angle arm 44, pivotally mounted on the floor of the casing 30 and having at its free end a flange 44a to which is secured a perforated bellows plate 46 and, on the left hand side as seen in Fig.
  • a perforated overlying flexible elastomer sheet 48 As shown in Fig. 3 circular perforations 46a in the plate 46 are out of register with circular perfor ⁇ ations 48a in the sheet 48, thus constituting a one-way valve.
  • the angle arm 44 is connected by bellows 52 to the free end of a second, similar bellows plate 54 mounted on the roof of the casing 30, the free end of the second plate 54 being connected by further bellows 56 to the end wall of the casing 30.
  • the bellows arrangement at the roof of the casing 30 is generally similar except that the fixed end of the bellows 52 is secured to a flange 58.
  • the exhaust bellows device 26 is of generally similar construction and operates in a similar way, but the elastomer sheets 48 do, of course, lie on the other (right hand side as seen in Fig. 1) of the bellows plates 46,54.
  • the heat-exchanger 18 comprises an insulated, elong ⁇ ate oblong section casing 60 having three lower exhaust flow ducts 62,64,66, each constituted by a series of tri ⁇ angular section channels formed by a floor 68 and a pleated heat transfer web 70, which forms the lower boundary of three similar upper incoming flow ducts 72,74,76 each having a cover 80.
  • the casing 60 has respective end chambers 82,84 for reversing the flow along the ducts such that the flows each pass along the heat exchanger 18 three times. Exhaust flow thus passes from duct 16, through end chamber 82, exhaust flow duct 62 and into end chamber 84, there to be reversed along duct 64. On reaching end chamber 82 the exhaust flow is again reversed to pass along duct 66 and into the exhaust duct 20.
  • U-shaped condensate drains 86,88 are provided through the floor of each end chamber 82,84, each drain being connec ⁇ ted to an inclined pipe 90.
  • the head of water trapped in the drain 88 is smaller than that in the drain 86, re ⁇ flecting the pressure drop through the heat-exchanger 18.
  • an exhaust bellows device 100 and an intake bellows device 102 are each housed within a coaxial casing 104 separated by an oblique plate 106.
  • An exhaust air inlet port 108 and a fresh air inlet port 110 are formed through the casing 104 adjacent to, and on opposite sides of, the dividing plate 106: an exhaust air outlet port 112 and a fresh air outlet 114 are formed through respective end plates 116 otherwise closing the ends of the casing 104.
  • An axial shaft 118 is supported by the end plates 116 and centrally by the dividing plate 106, the shaft being arranged to be driven through a worm 120 and gear 122 by an electric motor 124.
  • Solid with the shaft 118 is a face cam comprising a drum 126 supported on spokes 128 (see Fig. 5) and having a cam channel 130 cut into its outer surfaces.
  • Freely mounted on the shaft 118 are two piston-type assemblies 131,132 each comprising a crown 133 and an integral skirt 134, which is connected to the casing 104 by a rolling membrane bellows 136.
  • Each crown 133 is formed with per ⁇ forations 138 (see Fig. 5) and covered with an elastomeric membrane 140 having non-aligned perforations (not shown) .
  • the intake bellows device 102 is similarly construc ⁇ ted but the membranes 140 are, of course, secured over the opposite, right hand faces of the crowns 133.
  • the cam channel 130 follows a path that causes each pair of cam riders 144,148 to perform the same axial movements, the movements of the pairs of cam riders 142,146 being 90° out of phase.
  • the associated bellows assemblies 131,132 thus perform two reciprocations for each revolution of the drum 126.
  • the cam channel 130 does not follow a curved path regularly alternating each side of a central circumferential datum line (not shown) on the drum, but rather a path having two relatively long straight sections (shown occupied by the cam riders 144) connected by two short sections more acutely angled to the datum line (shown occupied by the riders 148) .
  • each bellows assembly 131,132 to perform slow pumping strokes in the left-hand direction of Fig. 4, alternating with quick return strokes.
  • One bellows element 131,132 is thus always starting its pumping stroke before the other finished, thus ensuring a steady flow of air from the inlet port 108 to the exhaust port 112.
  • the above-described system 100 affords the further advantages of requiring only a single power source (which is cooled by air flowing through the chamber) and providing excellent mechanical balance in both the axial and radial directions, thus reducing vibration and wear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air-Flow Control Members (AREA)

Abstract

On décrit un système de ventilation qui évacue l'air chaud et usagé d'un bâtiment et transfère la chaleur qu'il contient à de l'air d'entrée neuf de température inférieure. Ledit système comprend un soufflet d'évacuation (14) qui extrait l'air usagé à travers un échangeur de chaleur (18) fonctionnant à contre-courant avec une chute de pression élevée, ainsi qu'un soufflet d'aspiration (26) qui envoie dans le bâtiment de l'air neuf à travers l'échangeur de chaleur (18). Chaque soufflet (14, 18) comprend deux plaques de soufflet perforées (46, 54) montées pivotantes, chacune recouverte par une membrane élastique (48) à perforations non correspondantes. Le mouvement imparti aux plaques (46, 54) par la roue à came profilée (36) est tel qu'il engendre un écoulement constant d'air à travers lesdites plaques. Une autre possibilité consiste à remplacer les soufflets pivotants (46, 54) par deux paires de soufflets à piston à membrane roulante (131, 132), chaque paire étant entraînée par des cames planes respectives (130) montées sur un axe commun (118).
EP92907658A 1991-04-12 1992-04-13 Systeme de ventilation a rendement energetique eleve Withdrawn EP0578697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919107790A GB9107790D0 (en) 1991-04-12 1991-04-12 Energy efficient ventilation system
GB9107790 1991-04-12

Publications (1)

Publication Number Publication Date
EP0578697A1 true EP0578697A1 (fr) 1994-01-19

Family

ID=10693144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92907658A Withdrawn EP0578697A1 (fr) 1991-04-12 1992-04-13 Systeme de ventilation a rendement energetique eleve

Country Status (4)

Country Link
EP (1) EP0578697A1 (fr)
CA (1) CA2108285A1 (fr)
GB (1) GB9107790D0 (fr)
WO (1) WO1992018814A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ289611B6 (cs) * 1993-02-02 2002-03-13 Ltg Lufttechnische Gesellschaft Mit Beschränkter H Vzduchotechnické zařízení a jeho pouľití
CN107228062B (zh) * 2017-08-03 2020-05-19 鲍满腔 一种凸轮驱动机构及双缸风压机系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191000699A (en) * 1910-01-11 1910-10-20 Theodore Wiedemann Improvement in Method of Pumping Air or other Fluids.
CH266305A (de) * 1949-06-25 1950-01-31 Brunnschweiler Kurt Einrichtung zur Rückgewinnung von Wärme aus Abluft von Räumen zur Vorwärmung der eintretenden Frischluft.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9218814A1 *

Also Published As

Publication number Publication date
CA2108285A1 (fr) 1992-10-13
WO1992018814A1 (fr) 1992-10-29
GB9107790D0 (en) 1991-05-29

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