Refrigeration – Automatic control – Of external fluid or means
Reexamination Certificate
2000-11-06
2002-04-30
Esquivel, Denise L. (Department: 3744)
Refrigeration
Automatic control
Of external fluid or means
C062S179000, C236S00100H, C454S236000
Reexamination Certificate
active
06378317
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a method and a device for air conditioning and/or heating of premises, comprising at least one service room (kitchen, bathroom, toilet, etc.), and at least two main rooms (living room, drawing room, bedroom, hall, office etc.). It also extends to heating and/or air conditioning of buildings comprising several premises, and in particular housing blocks, tertiary accommodation premises (hotels, retirement homes), office blocks, etc.
This invention also relates specifically to a method and a device for air conditioning and/or heating, which, in addition to this heating and/or air conditioning, makes it possible to control in all seasons the supplies of renewed air required according to the regulations in force.
BACKGROUND OF THE INVENTION
At present, the simplest conventional ventilation solution which is designed to permit statutory supply of renewed air into premises, consists of providing air intake apertures on the facade in the main rooms, and extraction apertures in the service rooms. However, this solution is inefficient, and in particular can lead to discomfort and detrimental pollution and/or acoustic effects, in noisy and/or polluted environments.
For these reasons, the only solution which is actually proposed at present consists of using double-flow systems (extraction in the service rooms, and insufflation in the main rooms). However, this solution has a high cost price, owing to the need to increase the number of blower columns. In addition, according to this technique, it is difficult to modulate the throughputs blown into the main rooms, in accordance with the needs for supply of renewed air to the said rooms.
When the premises are equipped with a heating and/or air-conditioning device, management of control of the ventilation air to be supplied room by room also constitutes a delicate problem, which has not been solved hitherto. In fact, at present, it is physically impossible to distribute the throughput of renewed air equally room by room. In addition, stoppage of the heating and/or air-conditioning device by means for regulation, in particular in mid-season, or closure of one or more blower apertures, lead to interruption of any renewal of air in all the rooms or in the room(s) concerned. Thus, no heating and/or air-conditioning device at present which has a variable throughput is capable of assuring control, room by room, both of heating air and renewed air.
SUMMARY OF THE INVENTION
The object of the present invention is to eliminate this disadvantage, and its main objective is to provide a method and a device for heating and/or air conditioning, which additionally makes it possible to assure control of renewed ventilation air, room by room, in accordance with the regulations in force.
Another objective of the invention is to make it possible to modulate the throughputs of renewed air in accordance with the throughputs of air extracted.
Another objective of the invention is to make it possible to increase the renewal of renewed air in a room, when the latter is very crowded or smoky, without a deficit in the supply of renewed air in the other rooms.
Another objective of the invention is to make it possible to control the supply of renewed air in accordance with the external ambient pollution and the level of occupation of the premises.
For this purpose, the primary object of the invention is a method for heating and/or air conditioning of premises, comprising at least one service room, and at least two main rooms, consisting of:
using an external unit and at least one internal unit, the external unit comprising means for regulation with variable power and an exchanger, and each internal unit comprising an air take-up unit, means for ventilation with a variable power throughput and an exchanger, and being designed to assure the heating and/or air conditioning of at least two main rooms;
discharging a given volume of stagnant air from each service room;
conveying a given volume of renewed air to the air take-up units of each internal unit;
mixing the renewed air and the air taken up in each internal unit, upstream from the exchanger of the latter;
blowing the mixture of renewed air/heated and/or cooled air taken up, into each main room, through at least one blower aperture which is supplied by an internal unit, and each of which is associated with means for motorisation, which can make it possible to modify the position of opening of the said apertures; and
regulating the temperature in each main room, by means of temperature measurement means, with which the means for motorisation of the blower apertures are associated, such as to obtain positioning of each of these apertures which can make it possible to maintain each of the said main rooms at a pre-determined set temperature.
According to the invention, this method is wherein a central control unit is used, which is associated with the external and internal units, the means for motorization of each blower aperture, and the means for measurement of the temperature, and is programmed to be configured:
either in a mode for control of the temperatures of the main rooms, during which:
it controls the external and internal units and the means for motorisation of the blower apertures, according to the information received from the means for measurement of the temperature, such as to maintain the set temperature in each main room;
it determines the position of the means for motorisation of each blower aperture, such as to detect any total closure of the (or all of the) aperture(s) which supply/supplies a main room;
and, if all the apertures which supply at least one main room are closed, it is configured in a mode for control of renewed air, during which:
it measures the time of closure of the said aperture(s) closed;
after a time of closure of the said aperture(s), which is greater than a pre-determined threshold, it calculates the deficit in the supply of renewed air in each room not supplied, and controls the means for motorisation of all the blower apertures, such as to open each blower aperture initially closed, and to close the initially opened blower apertures of the rooms, for a period of time which is designed to make up for the deficit in the supply of renewed air in each room not initially supplied; and
it is reconfigured in the temperature control mode in the main rooms, when the deficit in the supply of renewed air has been made up.
According to the invention, when a method of this type has been perfected and set up, firstly it can be utilised with all methods of heating and/or air conditions used at present, which comprise a centralised blower unit, with regulation room by room, i.e. in particular:
the method described in patent FR-2 703 761 in the name of Mr RIBO; and
the conventional methods which use at least one internal unit and one external unit, consisting either of:
a power unit with variable heating and cooling, which is associated with a blower throughput modulated in accordance with the needs of the premises treated;
a centralised chilled water production unit (which is reversible or is associated with independent heat production), which supplies a convector fan in each apartment, or a system for processing air by areas;
an air processing system with a variable throughput;
a unit of the V.C.T. type (variable coolant throughput); or
a monoblock unit, for example of the air/air conditioning equipment type, installed in the roof.
According to the invention, the renewal of air is controlled by a sequential function, which, when a (or the) aperture(s) which supply a main room close(s) under the effect of the means for measurement of the temperature, and thus when the quantity of renewed air introduced into the room in question becomes too low, makes it possible to compensate in a very short time for the deficit of renewed air in this room, according to the following process:
1) If all the main apertures are open (general demand for heating or cooling). The renewed air is distributed equally in each main room, in accordance with the nominal throughpu
Esquivel Denise L.
Norman Marc
Young & Thompson
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