Ventilation – Having inlet airway – Including structure for mixing plural air streams together
Patent
1998-06-05
2000-08-15
Joyce, Harold
Ventilation
Having inlet airway
Including structure for mixing plural air streams together
454267, F24F 3052
Patent
active
061027928
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a mixing box for regulating the temperature of an air stream, said box comprising a chamber having dampers for mixing air of different temperatures. The air is supplied to the mixing chamber from two tubular channels which supply air streams with mutually different temperatures.
BACKGROUND ART
Such dual-channel systems are known for mixing a cold and a warm air stream, enabling quick and reliable temperature control. This is an interesting possibility in order to lower the costs for installation and energy in a ventilated building since it eliminates the need for pipe systems for hot and cold water outside the machine room. Several makes were on the market during the 70s and 80s and many systems were installed.
However recent development has departed from this technology in favour of water-borne heating and cooling, such as fan coil units or cooling ceiling combined with radiators. One reason was that the known mixing boxes entailed certain drawbacks, the dampers in the mixing boxes having a tendency to clog after some time in use, for instance, and that overflow often resulted between the supply channels so that the fundamental principle of the system entailing the supply of air at different temperatures was disrupted. Another problem with the known installations was that their mixing boxes require a considerable amount of space and must be installed in each room to be ventilated. The boxes also require pipes to be laid that take up relatively much space.
DESCRIPTION OF THE INVENTION
The drawbacks mentioned above have been eliminated with a mixing box designed in accordance with the present invention. Characteristic of the mixing box according to the invention is that the tubular channels are arranged to pass through the mixing chamber and each channel is provided with a damper. These dampers can be operated by a control means so that when the damper in one tubular channel is moved in closing direction the damper in the other tubular channel is moved in opening direction. Furthermore the mixing chamber is designed to supply one or more feed-out channels with the temperature-regulated air mixture, this or these feed-out channels leading to the room(s) to be heated/cooled.
By means of advantageous further developments of the mixing box in accordance with the limitations defined in the dependent claims, a dual-channel system has been developed that is simple to install both in existing buildings and in new buildings, without major alterations having to be made in each of the rooms where the temperature is to be regulated by means of the ventilation air supplied.
According to one aspect of the invention all the mixing boxes form a part of the main pipe for the air to be supplied, this main pipe with the mixing boxes being placed in the ceiling of a corridor, for instance, running beside the rooms to be heated/cooled, each of which need only be provided with a ventilator of conventional type. Since the dimensions of the mixing boxes do not deviate to any great extent from what is required for the two air-supply channels of the main pipe, the ceiling of the corridor need not be noticeably lowered.
The mixing box and the installation in accordance with the present invention created thereby, offer the following advantages besides those mentioned above:
DESCRIPTION OF THE PREFERRED EMBODIMENT
The advantages mentioned above and others will become evident from the following more detailed description of the mixing box according to the invention. The invention is illustrated by describing a preferred, but not limiting, embodiment of the mixing box as shown in the accompanying drawings in which
FIG. 1 shows a basic diagram of a known installation for temperature-regulated ventilation of individual rooms in a building.
FIG. 2 shows a basic diagram for a corresponding installation designed with mixing boxes according to the present invention,
FIG. 3 shows in perspective a preferred embodiment of the mixing box according to the invention, and
FIGS. 4-6 show differ
REFERENCES:
patent: 1770593 (1930-07-01), Johnson
patent: 2793812 (1957-05-01), McDonald
patent: 2794598 (1957-06-01), Waterfill
patent: 2922580 (1960-01-01), Phillips et al.
patent: 2981474 (1961-04-01), Frummond et al.
patent: 3026041 (1962-03-01), Jentoft
patent: 3376916 (1968-04-01), Gressett
patent: 4019566 (1977-04-01), Cobb
Air Innovation Sweden AB
Joyce Harold
LandOfFree
Mixing box for mixing air streams from two tubular channels does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mixing box for mixing air streams from two tubular channels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mixing box for mixing air streams from two tubular channels will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2001105