Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
  • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K9/00—Arc welding or cutting
  • B23K9/32—Accessories
  • B23K9/325—Devices for supplying or evacuating shielding gas
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C15/00—Details
  • F24C15/20—Removing cooking fumes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
  • F24F1/01—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station in which secondary air is induced by injector action of the primary air
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
  • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
  • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
  • F24F3/163—Clean air work stations, i.e. selected areas within a space which filtered air is passed

Definitions

• the invention concerns a device and a method for ventilation.
• an intake and exhaust air device wherein the intake air is made to flow into the zone of stay of a person working at a working point and through which device air is removed so that the impurities coming from a source of impurities at the working point are first sucked into an interior hood space in a kitchen hood and from said space through fat filters into the outlet duct.
• the prior-art solutions of equipment serve either for ventilation at a specific site or for general ventilation alone.
• the prior-art solutions of equipment have not been suitable both for removal of air from a limited site and for general removal of air.
• attempts have been made to find an improvement for said deficiency involved in prior art.
• a ventilation device is formed through which air is introduced at least as a carrier air jet, which induces carriage of impurities towards the exhaust duct.
• a duct for general ventilation is also fitted to be opened, in which case, through the device, both impurities and/or excessive heat arising at the working point are removed through removal out of a limited area, and air is removed as general removal as the device includes an opening for general ventilation into the exhaust air chamber to pass a flow of exhaust air flow for general ventilation into the exhaust duct.
• the device besides an exhaust opening for contami- nated air placed inside the hood construction, the device also includes an exhaust opening for general ventilation.
• an exhaust opening for general ventilation Through said exhaust openings, the flow sucked by means of a blower is removed through an exhaust duct common of the exhaust air flows.
• an intake air flow is accom ⁇ plished by means of the device so that the flows are substantially equally large, in which case no changes need to be made in the overall ventilation.
• the adjustment of the general ventilation entering into the room need not be changed, nor does the adjustment of the air flow in the exhaust duct have to be changed.
• the device in accordance with the invention may operate as a device of general ventilation for the whole room space, so that through the kitchen hood it is possible to introduce all the fresh air to be blown into the room, and through said kitchen hood it is possible to remove all the exhaust air to be removed out of the room.
• the device in accordance with the invention is mainly characterized in that the equipment includes a second exhaust air opening, which opens into the exhaust air chamber, which is meant for general ventilation, which opens into the room space from the side of the frame, and through which exhaust air of general ventilation of the room space is sucked into the exhaust air chamber and further into the exhaust air duct.
• a second exhaust air opening which opens into the exhaust air chamber, which is meant for general ventilation, which opens into the room space from the side of the frame, and through which exhaust air of general ventilation of the room space is sucked into the exhaust air chamber and further into the exhaust air duct.
• the ventilation method in accordance with the invention is mainly characterized in that in the method, additionally, exhaust air of general ventilation is removed through the same ventilation device.
• Figure 1A shows a first embodiment of the invention, a kitchen hood solution.
• Figure IB is an axonometric view of a kitchen space and of the intake and exhaust air devices in accordance with the invention installed in the kitchen space.
• Figure 2 is a sectional view of a limited-area air-exhaust device in accordance with the invention.
• Figure 3 is an axonometric view of a preferred embodiment of an intake and exhaust air device in accordance with the invention with the front plate re ⁇ moved.
• Figure 4 shows , an embodiment of a device in accordance with the invention which is provided with a carrier-air jet opening that opens into the intake-air chamber.
• Figure 5 shows the intake air side of an intake and exhaust air device in accordance with the invention, and therein the air discharge face for the intake air flow of general ventilation flowing into the room space as well as the air discharge face, preferably a perforated face, for the limited-area air flow into the working zone of a person working at the proximity of the hood.
• Figure 6 shows a second embodiment of the device and the method in accord- ance with the invention, wherein the device removes air from the working point, from its source of impurities.
• Fig. 1A shows a first preferred embodiment of the invention.
• the ventilation device 10 is a kitchen hood, which is fitted, e.g., above a kitchen stove 11.
• the hood is shown as a schematic sectional view.
• the kitchen hood shown in the figure comprises a frame 12 and a space C for collecting of impurities, which space is defined by the frame 12 in its interior and which space opens down towards the sources 11 of impurities shown in the figure.
• the device 10 com ⁇ prises an intake air duct 13 for intake air. Through a blower, not shown, air is made to flow out of the intake air duct 13 into an intake air chamber 14 confined in the frame 12 and defined by the walls 14a.
• the air is made to flow out of the intake air chamber 14 as a carrier air jet in the way indicated by the arrow L, c .
• the carrier air jet L, c is made to flow through the openings 25 in the collector space C so that the carrier air jet L, c attracts the more impure air and/or excess heat coming from the source 11 of impurities, and said carrier air jet is directed across the space C for collecting of impurities, placed inside the hood, towards the exhaust air opening (arrow L* ⁇ ), through which it flows into the exhaust air chamber 18.
• an exhaust air opening 20 is opened for general ventilation, and said exhaust air flow for general ventilation is indicated in the figure by the arrow L- ⁇ .
• the exhaust air flow 1 ⁇ is passed out of the exhaust air chamber 18 into the exhaust air duct 17 and out of connection with the device.
• the supply of air into connection with the device through the duct 13 is illustrated by the arrow L,.
• the air of higher impurity and/or of excessively high temperature, collected and rising from the source of impurities and/or from the source of excessive heat, is indicated in the figure by the reference arrows L,.
• Fig. IB the kitchen space is shown as an axonometric view. In the room
• two limited-area air-exhaust devices 10 in accordance with the inven ⁇ tion have been installed. They have been fitted above the sources of excessive heat and impurities in th& kitchen space shown in the figure, such as, as is shown in the figure, above the kitchen stove 11.
• the intake and exhaust air device comprises an intake air opening for general ventilation and/or an intake air opening for hmited-area ventilation as well as an exhaust opening from the interior of the hood for more impure exhaust air as well as an exhaust opening from the side of the hood for the exhaust air of general ventilation. It is essential that the amount of air introduced into the room space through the device is substantially equal to the amount of air removed through the device.
• the overall ventilation of the room space H is carried out through the devices 10.
• Fresh air is introduced into the room space through the intake air duct 13, and the air is made to flow into the room space H in the way indicated by the arrows , a and L ⁇ .
• the ⁇ trrows L, a represent the flow of general ventilation
• the arrows L, b represent the limited-area flow of intake air into the zone of stay of the person working near the kitchen stove.
• the removal of air out of the room space H is accom ⁇ plished through the hood constructions so that the intake and exhaust air device 10 in accordance with the invention includes a separate exhaust air duct for general ventilation.
• impure air is removed through the interior space C in the hood and through the fat filters in the way indicated by the arrows ⁇ in Fig. 1, and, out of the room, exhaust air of general ventilation of the room space is removed through the opening 20 (in Fig. 2) in the way indicated by the arrows L ⁇ .
• Fig. 2 is a sectional view of an intake and exhaust air device in accordance with the invention.
• the kitchen hood comprises a frame 12 and a space C for collecting of impurities, which is confined in the interior of the frame and which opens down towards the sources 11 of impurities shown in the figure.
• the intake and exhaust air device 10 includes an intake air duct 13 for fresh intake air. Through a blower, not shown, air is made to flow out of the intake air duct 13 into an intake air chamber 14 inside the frame 12, which chamber is defined by the walls 14a. Out of the intake air chamber 14, air is made to flow into the room space H through at least one air discharge opening and, in the embodiment shown in Fig. 2, through a first air discharge opening 15 and a second air discharge opening 16.
• first air discharge opening 15 air is made to flow in the way indicated by the arrows L ⁇ , and said air flow operates as the intake air flow for general ventilation.
• second air discharge opening 16 air is made to flow into the room space H in particular into the zone of stay of a person working at the proximity of the intake and exhaust air device 10. Said limited- area air flow is illustrated by the arrows L, b .
• the exhaust air flow through the intake and exhaust air device 10 is accom ⁇ plished by means of the suction produced by a blower (not shown) through the exhaust air duct 17.
• the exhaust air duct 17 is opened into the exhaust air chamber 18.
• the exhaust air chamber comprises an exhaust air opening 19 and, in connection with it, fat filters 22.
• the exhaust air opening 19 is opened into the space C for collecting of impurities, placed inside the frame 12.
• the equip ⁇ ment further includes an exhaust opening 20 for general ventilation, which is opened into the exhaust chamber 18 and through which the exhaust air of general ventilation is sucked out of the room space H.
• the equipment further includes a regulator 21 of the intake air flow in the intake air chamber 14.
• the regulator 21 comprises a handle 21a, a bearing 21b, and a regulation damper 21c.
• Fig. 3 is an axonometric view of a second preferred embodiment of a kitchen hood construction in accordance with the invention, with the end plate removed.
• the air for the overall ventilation of the room space is passed into the room space through the intake ducts 13, and the exhaust air for general ventilation is passed through the exhaust air opening 20 into the exhaust air chamber 18 and further into the exhaust air duct 17.
• the equipment further includes flow openings 25 for the carrier air flow , c , which openings are opened into the interior space C in the hood and which openings are further opened into the intake air chamber 14.
• Fig. 4 is a more detailed illustration of the solution shown in Fig. 3.
• the openings 25 are opened into the intake air chamber 14.
• the air is made to flow as a carrier air jet L, c towards the fat filters 22 through the whole area C inside the hood.
• the carrier air jet L, c attracts efficiently the impure air L 3 rising from the source of impurities and operates as a carrier-air and trap air jet for said impure air, guiding said air further towards the fat filters 22 in the exhaust air chamber and further into the exhaust air chamber.
• Fig. 5 is an axonometric view of the intake air side of the intake and exhaust air
• the air is made to flow into the intake ⁇ air chamber in the way indicated by the arrows L, through the intake air ducts 13.
• the air is made to flow further into the room space through the first air discharge opening 15, meant for intake air of general ventilation, and through the second air discharge opening 16, meant for intake air of limited-area ventilation.
• the first air discharge opening 15 comprises oblong lattice parts.
• the amount of air discharged per unit of time through the discharge opening 15 is larger than that discharged through the discharge opening 16.
• the discharge opening 16 comprises a perforated face.
• Fig. 6 shows an embodiment of the invention wherein contaminated air from the source of impurities at a working point or other impurities are removed by means of the ventilation device 100.
• the device 100 comprises a frame 26.
• the device comprises exclusively an exhaust duct opening 28 for general removal in respect of general ventilation.
• an exhaust chamber 27 for exhaust air into which the first exhaust opening 28 for exhaust air is opened at the proximity of the source of impurities and a second exhaust opening 29 for exhaust air, for exhaust air of general ventilation, the exhaust opening being opened into the room space H in a direction away from the source of impurities.
• a blower (not shown), an exhaust air flow is produced through the exhaust duct 30.
• the equipment further comprises a terminal member 31 for intake air, which comprises an intake air duct 32, through which the air is passed into the air discharge opening 33 for general ventilation and into the air discharge opening 34 for limited-area ventilation. Through the air discharge opening 34, fresh air is made to flow to above the working point, into the zone of stay of the person working at the working point.
• an amount of intake air is passed into the room space that is equal to the amount of air removed through the device.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Plasma & Fusion (AREA)
• Ventilation (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8529810

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (17)

Citations (3)

Family Cites Families (6)

• 1990
  • 1990-01-31 FI FI900494A patent/FI88433C/fi not_active IP Right Cessation
• 1991
  • 1991-01-30 CA CA2050474A patent/CA2050474A1/en not_active Abandoned
  • 1991-01-30 EP EP91902863A patent/EP0538258A1/en not_active Withdrawn
  • 1991-01-30 WO PCT/FI1991/000029 patent/WO1991011271A1/en not_active Application Discontinuation
  • 1991-01-30 US US07/768,858 patent/US5220910A/en not_active Expired - Lifetime
  • 1991-09-06 DK DK911569A patent/DK156991D0/da not_active Application Discontinuation

Patent Citations (3)

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