Ventilation and air conditioning unit

• US 4,181,690 A
• Filed: 05/16/1978
• Issued: 01/01/1980
• Est. Priority Date: 05/18/1977
• Status: Expired due to Term

• Current Assignee: S.A. Delta Neu
• Original Assignee: S.A. Delta Neu
• Inventors: Neu, Francis
• Primary Examiner(s): Chiesa, Richard L.
• Application Number:
  US05/906,624
• Time in Patent Office: 595 Days
• Field of Search: 261/29, 261/30, 261/36 R, 261/96, 261/103, 261/106, 261/109, 261/105, 261/DIG. 4, 261/DIG. 15, 261/DIG. 17, 261/DIG. 34, 261/DIG. 41, 261/127, 261/14 1, 98/30, 98/33 R, 98/33 A
• US Class Current: 261/29
• CPC Class Codes: F24F 13/14 built up of tilting members, e.g. louvre
• CPC Class Codes: F24F 13/1413 using more than one tilting member, e.g. with several pivoting blades F24F13/15 takes precedence
• CPC Class Codes: F24F 13/1486 characterised by bearings, pivots or hinges
• CPC Class Codes: F24F 13/15 with parallel simultaneously tiltable lamellae
• CPC Class Codes: F24F 6/04 using stationary unheated wet elements
• CPC Class Codes: F24F 7/025 with forced air circulation by means of a built-in ventilator

Abstract

A ventilation and air conditioning apparatus operating according to the adiabatic evaporation principle and adapted to be fitted under a roof, the apparatus comprising a prismatic housing of which the bottom portion consists of an annular water-filled tank having in its central portion an upstanding frustoconical element having a vertical axis of which the vertex angle is at least 30 degrees. The major base of the element is connected in an air-tight manner to the tank, the minor base of this frustoconical element being disposed at the top and closed, and receives through it the vertical shaft of an electric motor driving a helical fan provided with relatively large blades rotating at a relatively slow speed and adapted to draw in air through a shaft of which at least the lower section is vertical and opens into the upper portion of the housing, while the upper section of this shaft opens into the external atmosphere.

Claims

1. Ventilation and air conditioning apparatus operating according to the adiabatic evaporation principle and adapted to be fitted under a roof, said apparatus comprising a prismatic housing of which a bottom portion comprises an annular water-filled tank having in its central portion an upstanding frustoconical element having a vertical axis of which the vertex angle is at least 30 degrees, the major base of said element being connected in an air-tight manner to the tank, the minor base of this frustoconical element being disposed at the top and closed, and receiving through it a vertical shaft of electric motor means driving a helical fan provided with relatively large blades rotating at a relatively slow speed and adapted to draw in air from a first conduit directing external air to the fan and equipped with an air heater through a second conduit of which at least a lower section is vertical and opens into an upper portion of said housing, an upper section of the second conduit opening into the external atmosphere, said housing having vertical walls with apertures formed therein closed by detachable pockets filled with wood chips to constitute a filtration mat, said pockets being sprinkled continuously with water taken from said water-filled tank by a pump delivering said water continuously in a closed-circuit fashion into an upper conduit, said circuit further comprising on the one hand a water inlet for keeping the water level at a constant value and on the other hand a water recycling valve, said apertures being provided, downstream of the pockets, with a plurality of horizontal louvre blades adapted to be set in any desired inclined position, each blade being mounted for tight-fit pivotal movement about a horizontal axis.

2. Apparatus according to claim 1, wherein the conduit supplying air to the fan is equipped with a prefilter.

3. Apparatus according to claim 1, wherein the conduit supplying air to said fan is equipped with a by-pass opening into the room, between the roof and the fan.

4. Apparatus according to claim 1, wherein the axes of said louvre blades are comprised of rubber tubular sections inserted into holes formed in the vertical walls of said apertures and in ribs formed in each blade, and also in complementary ribs formed in a counter-plate associated with each blade, said rubber tubular sections being adapted to be expanded by means of pins driven into their bores in order to lock the blades in desired position.

6. Apparatus according to claim 1, wherein the conduit directing external air to the fan is equipped with an air heater.

7. Apparatus according to claim 1, wherein the conduit supplying air to the fan is equipped with a pre-filter.

8. Apparatus according to claim 1, wherein the conduit supplying air to said fan is equipped with a by-pass opening into the room, between the roof and the fan.

5. A ventilation and air conditioning apparatus operating according to the adiabatic evaporation principle and adapted to be fitted under a roof, said apparatus comprising a prismatic housing of which a bottom portion comprises an annular water-filled tank having in its central portion an upstanding frustoconical element having a vertical axis of which the vertex angle is at least 30 degrees, the major base of said element being connected in an air-tight manner to the tank, the minor base of the frustoconical element being disposed at the top and closed, and receiving through it a vertical shaft of an electric motor driving a helical fan provided with relatively large blades rotating at a relatively slow speed and adapted to draw in air through a shaft of which at least the lower section is vertical and opens into an upper portion of said housing, the upper section of the shaft opening into the external atmosphere;

the housing having vertical walls with apertures formed therein closed by detachable pockets filled with wood chips to constitute a filtration mat, said pockets being sprinkled continuously with water taken from said water-filled tank by a pump delivering said water continuously in a closed-circuit fashion into an upper conduit, said circuit further comprising on the one hand a water inlet for keeping the water level at a constant value and on the other hand a water recycling valve, the vertical walls having downstream of the pockets a plurality of horizontal louvre blades adapted to be set in any desired inclined position, said blades each mounted for tight-fit pivotal movement about a horizontal axis and having axes comprised of rubber tubular sections inserted into holes formed in each blade, and also in complementary ribs formed in a counter-plate associated with each blade, said rubber tubular sections being adapted to be expanded by means of pins driven into their bores in order to lock the blades in desired position.