EP0942238B1 - Heating and air conditioning system using the central heating - Google Patents

Abstract

The installation procedure for a heating and air conditioning system (31) consists of fitting an evaporator (18) inside the building, together with a ventilator (19), a compressor (20) and a condenser (11), and a cooler (17) for the water from the condenser outside the building. The condenser and cooler are connected by the central heating water circuit (3), which can be used to feed either the heating/air conditioning system or a heater (4).

Description

The invention relates to a method of installing a heating system and air conditioning, a device, and a heating and air conditioning system.

The technical field of the invention is therefore the heating and air conditioning of residential premises for residential, public or professional use.

The invention applies to premises with central heating with hot water. It's about both premises where this central heating exists, as well as premises in progress equipment with such heating.

The term "water" is used broadly, and obviously includes any liquid can be used for such heating, with or without additive such as antifreeze or the like.

A central water heating indifferently includes at least one boiler individual, a collective boiler, or is connected to a general circuit such than those of district heating.

In addition, it is common to want to air condition at least certain rooms or rooms of such premises.

Air conditioning systems using inside the premises to be cooled minus one evaporator, and its fan, and outside at least one compressor, a condenser, with means for cooling the condenser, are known.

Systems using water chillers, chilled water networks and fan coils are also known.

One of the main disadvantages of this type of system is due to the works important installation, in particular to set up in the local air conditioning, either refrigerant or chilled water piping networks, or ventilation ducts.

When a sophisticated air conditioning system is not required or possible and / or a simple refreshment, for example periodic, suitable for comfort, no technique using material existing on the market, is not satisfactory in practice.

In addition, the installation and maintenance of these systems is expensive, if not often unaffordable for residential premises.

We also know so-called mobile air conditioner systems, comprising a inner box containing in particular a compressor, an evaporator and a fan.

The inner box is connected by flexible pipes to a second box containing a condenser and its fan. This second box is located at outside, usually under a room window.

The exterior boxes are unsightly.

In general, the outer casing contains an air condenser, so that the condensation is obtained at a temperature of the order of 45 ° C. The motor of the compressor is therefore chosen to provide compression capable of allow condensation at such a temperature.

To illustrate the known techniques, let us quote the document US-A-3.305.001 which describes a system for cooling certain rooms in a building to simultaneously heat other rooms, the heat extracted from the cooled rooms could be supplied to rooms requiring heat.

Document DE-A-27.04.857 provides substantially the same system as the document evokes above, to use the heat of sunny rooms, to reheat a shaded room, and vice versa.

Document FR-A-2,723,179 describes a versatile thermal system with a differential pressure regulation, a two-way motorized valve, a continuous flow intermediate circuit and a bypass bottle, a radiator with individual pumps, room controller, thermostat switch for automatic summer-winter switching, and an energy meter mixed thermal.

Let us also cite the document FR-A-2.313.640 which describes an installation for the air conditioning of buildings with heat pumps installed in several rooms, which can be switched according to demand, for heating or cooling operation.

Heat exchangers connected to a central unit are connected in a circuit to a second heat exchanger to heat or cool the air ambient, while a third heat exchanger is provided in parallel with the first in the refrigerant circuit.

a) l'utilisation de caissons intérieurs contenant au moins le compresseur, l'évaporateur et le condenseur, mais avec un compresseur de puissance moteur réduite par rapport aux caissons sur le marché, tout en obtenant une puissance frigorifique suffisante à l'évaporateur, pour limiter l'encombrement et le bruit ;

b) d'éviter l'installation à l'intérieur du local, d'un réseau dédié de frigorigène, d'eau glacée ou de conduites d'air ;

c) de ne pas avoir à disposer de multiples condenseur à l'extérieur des locaux.

The invention as defined in claim 1 aims in particular to allow:

a) the use of internal boxes containing at least the compressor, the evaporator and the condenser, but with a compressor of reduced engine power compared to the boxes on the market, while obtaining a sufficient cooling capacity at the evaporator, for limit congestion and noise;

b) avoid installing inside the premises a dedicated network of refrigerant, chilled water or air ducts;

c) not having to have multiple condensers outside the premises.

Obviously, it is necessary to evacuate to the outside the heat from the room conditioning.

Indeed, during the period of need for cooling of the premises, the central heating networks are stopped.

In this context, the invention proposes, to limit the work and the investments, to use existing heating networks, to ensure the transfer of the thermal load from the premises to be cooled to the outside.

To do this, the invention provides for using as a secondary, the network closed loop water from central space heating for cooling of a condenser. The network is itself cooled by external means.

However, putting this use into practice raises another problem.

Most central heating networks are not or poorly insulated thermally. Existing insulation is not designed for low water temperatures and therefore have no "vapor barrier".

Some pipes being embedded in the walls or embedded in the floors, condensation of ambient water vapor is therefore to be avoided, as well as consequences of the oxidation of the pipes, to avoid alteration of these walls and floors. This constraint therefore defines the lower limit of the network water temperature heating in cooling mode of the indoor condensers.

The power of the compressor motor can be reduced by approximately 50% depending on manufacturers' technical documentation, insofar as the condensation is not obtained at 45 ° C as in an air condenser of market, but at around 20 ° C with a water condenser.

This significantly improves the so-called "C.O.P." coefficient of performance, because the compression ratio is reduced compared to an air condenser.

This also makes it possible to alleviate the harmful condensation problems on the pipes.

The invention makes it possible to produce an air conditioning system with a box interior containing a traditional evaporator and its fan also traditional, as well as a compressor.

The water condenser is therefore an element of the inner box and the water necessary for its cooling comes from the central heating network, which is itself cooled by external means.

The heating network is thus used for the evacuation of the heat of condensation towards these external means.

To this end, the invention in particular requires means for connecting the condenser to the heating network, and external means of cooling of the heating network water.

The external means for cooling the water in the heating network are for example a traditional water cooling refrigeration unit, with an external air condenser.

We understand that it is easy to install outside the room to be air conditioned, discreet and therefore relatively aesthetic in comparison with known boxes, such cooling means.

These can then include a single condenser outside the system, the water cooling exchanger or evaporator, which can be mounted in parallel or "bypass" of the boiler.

Note here that in the case of a district heating network, the means of heat production may include an exchanger, and the cooler water from the air conditioning system can be arranged upstream or downstream of this exchanger.

The invention makes it possible to remedy the drawbacks and problems, as well as achieve the goals, mentioned above, in particular.

To this end, a first object of the invention is a method of installing a heating and air conditioning system of a room to be cooled according to claims.

A second object of the invention is an interior air conditioning device and possibly heating, for example suitable for installation according to the process mentioned above, according to the claims.

A third object of the invention is a heating and air conditioning system with at least one such device and / or installed according to the method, mentioned more high according to the claims.

• la figure 1 est une vue schématique de principe d'une installation de chauffage central traditionnelle ;
• la figure 2 est une vue schématique d'un système de climatisation et chauffage selon l'invention, coopérant avec l'installation de la figure 1 ;
• la figure 3 représente un mode de réalisation avec un élément de chauffage intégré au dispositif de climatisation, substitué à un radiateur.
• la figure 4 est un schéma d'un raccordement intégrant une vanne trois voies et un raccord deux voies.

The invention is better understood on reading the description which follows and refers to the drawings in which:

• Figure 1 is a schematic view of the principle of a traditional central heating installation;
• Figure 2 is a schematic view of an air conditioning and heating system according to the invention, cooperating with the installation of Figure 1;
• FIG. 3 represents an embodiment with a heating element integrated into the air conditioning device, substituted for a radiator.
• Figure 4 is a diagram of a connection incorporating a three-way valve and a two-way connection.

In Figure 1, a room A is shown with a heating installation traditional central.

This central heating installation comprises a boiler 1, a pump hot water circulation 2, a network of pipes 3 and elements 4 heaters such as radiator, convector, fan coil units, etc.

In FIG. 2, the room A in FIG. 1 is equipped with a system 31 for air conditioning and heating.

The boiler 1, the pump 2, the network 3 and the radiators 4 keep by example in winter their functions.

Note that the water outlet from the radiator 4 is diverted to a device for air conditioning 5 or air conditioner.

This air conditioner 5 is located inside the room A to be air conditioned, for example in summer, here near a radiator 4.

In heating mode, the output of this radiator 4 is directed to a channel 6, while a channel 7 of a three-way valve 8 is closed.

The valve 8 is part of hydraulic means of prohibition of operation of a compressor 20.

This position of the valve 8 allows the output of the element 4 to return to the network 3, via line 9, the air conditioner 5 not being in service.

The heating installation thus works traditionally. In the boiler room, boiler 1 is in service, as well as pump 2.

Means 10 for breaking thermal conduction make it possible to isolate a condenser 11 in the air conditioner 5, of the hot water network 3.

This condenser 11 comprises a primary 13 and a secondary 12 connected to the network 3. The thermal conduction breaking means 10 can here be simple, such as a short section of piping made of non-conductive material heat, because in this operating mode, water does not circulate in the condenser 11.

A three-way valve 14 is open on a track 15 and closed on a track 16 thus isolating from the hot water network means 17 for cooling mains water 3 or cooler, which is not in operation.

Thus, despite the equipment necessary for air conditioning in summer, the heating operation in winter, is strictly identical to what it was previously without this equipment.

The valve 14 is part of hydraulic means for prohibiting operation means 17.

In air conditioning mode, boiler 1 is stopped. The air conditioner 5 is in service.

An evaporator 18 in the air conditioner 5 cools the ambient air in room A, driven by a fan 19.

The refrigeration cycle includes primary compression using a compressor 20, condensation at the primary 13 of the exchanger formed by the condenser 11, a pressure drop using a regulator 21 and again evaporation in the evaporator 18.

According to the invention, the water circulating in the secondary 12 of the condenser 11 is conveyed by the central heating network 3 to the means 17 or cooler, which is located outside room A.

This water, coming as in heating mode, from the outlet of the radiator 4 is directed by the three-way valve 8, closed on track 6 and open on track 7, towards the condenser 11 which it cools in passing by heating itself, then is returned to line 9 and the external cooler 17, through the three-way valve 14, the way 15 of which is closed and the way 16 open, the pump 2 being in service.

The water heating up as it passes through the condenser 11, the cooler 17 keeps the mains water 3 at the desired temperature for the condensers 11.

Thus, the network 3 allowing the circulation of water between the condenser 11 interior and exterior cooling means 17 is a network 3 of traditional central heating.

The temperature of the water leaving the cooler 17 must be the lowest possible, so that the condensing pressure in primary 13 is low and that as a consequence, the power necessary for compression in 20 is also weak.

However, a lower limit of this temperature exists to avoid condensation of ambient water vapor, around the water network and on the radiator surface 4.

This objective is achieved with water at for example 18 ° C which will allow a condensation of the refrigerant at approximately 22 ° C. The water temperature is adjustable according to the ambient humidity.

Since the quantity of heat to be evacuated at the condenser 11 corresponds approximately the sum of the cooling capacity developed at the evaporator 18 and the electrical power absorbed by the compressor 20, the water flow to the condenser 11 must therefore be sufficient.

It is obvious that the heating calorific power to maintain a atmosphere at 20 ° C when the outside temperature is -10 ° C, is good greater than the cooling power of air conditioning to maintain the same atmosphere at 24 ° C when the outside temperature is around 25 ° C at 30 ° C.

This allows for sufficient water flows although the power heat output is obtained with so-called "Dt" temperature differences of water between the inlet and outlet of a radiator 4, much higher than what is obtained with a water condenser.

The cooling of the ambient air on passing over the evaporator 18 causes condensation, and the water thus collected by a collector 22 must be evacuated.

This is done in one example, by a pump pushing in small flexible or rigid piping easy to install in plinth and joining a network waste water outlet.

Another embodiment, the invention provides for evacuating this condensation water by their introduction under pressure into the heating network 3 by via a pump 23 and a non-return valve 24.

As liquids are not compressible, this excess water leaves the network 3 by a discharge valve 26 avoiding overpressures.

For example, the valve 26 is located near a waste water outlet, and allows the evacuation of excess water in it.

• le premier circuit de circulation de frigorigène primaire 13, et le deuxième circuit de circulation d'eau secondaire 12 relié par des moyens de raccordement 27 au réseau 3 de chauffage central;
• l'évaporateur 18 au primaire et son ventilateur 19;
• le compresseur 20;
• le condenseur 11 à eau, d'échange entre primaire 13 et secondaire 12;
• des moyens de commande 28 du dispositif intérieur 5; et
• des moyens de branchement 29 électrique du ventilateur 19 d'évaporateur, d'un moteur du compresseur 20 et ici des moyens de raccordement 28, à une source S d'énergie.

In general, the interior device 5 or air conditioner comprises at least:

• the first primary refrigerant circulation circuit 13, and the second secondary water circulation circuit 12 connected by connection means 27 to the central heating network 3;
• the primary evaporator 18 and its fan 19;
• the compressor 20;
• the water condenser 11, exchange between primary 13 and secondary 12;
• control means 28 of the interior device 5; and
• electrical connection means 29 of the evaporator fan 19, of a compressor motor 20 and here connection means 28, to a source S of energy.

This source S is here the electrical sector of room A.

• des moyens 8 d'interdiction, qui empêchent son fonctionnement en mode chauffage ; et
• des moyens 10 de rupture de pont thermique, entre le secondaire 12 et les moyens 27 de raccordement.

In FIG. 2, the device 5 further comprises

• means 8 of prohibition, which prevent its operation in heating mode; and
• means 10 for thermal break, between the secondary 12 and the connection means 27.

We have seen that the device 5 comprises between the internal condenser 11 and the network 3, means 10 for thermal break.

In the embodiment of FIG. 4, the connection means 27 are combined with the means 10 for breaking the thermal bridge.

In this example, they include at least one connection sleeve to the central heating network 3, with a breaking section in insulating material such as synthetic material.

According to the embodiment of FIG. 2, the internal condenser 11 is hydraulically connected to the heating network 3 in series with respect to heating element 4 in room A.

The connection means 27 here comprise a connection sleeve to an outlet from this heating element 4.

We have also seen that the device 5 comprises at least one three-way valve 8 on the one hand connected as an input to this network 3.

On the other hand, an output channel is connected to a secondary 12 of the condenser 11, the other being connected via the conduit 6 to the outlet piping 9 of the device 5 to the network.

In FIG. 3, the internal condenser 11 is hydraulically connected to the network 3 in parallel with a heating element 4.

In this way, the water circulates exclusively in this condenser 11 without passing through this element 4, in cooling mode.

Here, the device 5 comprises in the secondary 12, selection means formed by the valve 8. These means are capable of directing the water from the network 3 either to the heating element 4, ie towards the condenser 11.

To this end, the three-way valve 8 is on the one hand connected at the input to this network.

On the other hand, it has outputs, one connected to a secondary 12 of the condenser 11, the other being at the inlet of the heating element 4 mounted in parallel.

The output of this element 4 is also connected to the network 3.

In the implementation of FIG. 4, the means 10 and 27 combined allow an internal condenser 11 and a heating element 4 connected in parallel are connected to the central heating network 3 by means of common input and output connections.

In the device 5 of FIG. 3, the element 4 is installed opposite the evaporator condenser fan 19.

In this way, the fan 19 can increase the thermal diffusion of the heating element 4 in room A, in heating mode.

The device 5 further comprises in its control means, a security arrangement 30.

This arrangement 30 prohibits operation in cooling mode of the air conditioner 5, using thermostatic means causing the imperative shutdown of the compressor 20 in heating mode and / or when the water temperature in upstream of the condenser 11 is greater than a predetermined value. Through example this temperature is of the order of 30 ° C.

The system 31 is, as we have seen, an air conditioning and heating system.

This system 31 includes cooling regulation means 32 outdoor, so that the water temperature can be regulated in mode air conditioning, to stay high enough to avoid condensation of the ambient water vapor on the heating network 3.

The system 31 further comprises signal transmission means 33 between the internal control means 28 of the device 5 and of components outside room A such as the cooling means 17, the pump 2 of water circulation, mode selection valve 14, discharge valve 26, the means 32 or the like.

In FIG. 3, these signal transmission means 33 comprise a connection in 29 to the electrical sector of room A.

The relief valve 26 and the pump 23 for pressurizing the water in network 3 are here arranged so that the condensation water coming from the evaporator 18 inside the room A, is evacuated by introduction under pressure in the network 3.

The excess water is thus evacuated in another place by the valve of discharge 26, avoiding overpressures in the network 3.

According to the embodiment shown in FIG. 3, the system 31 includes a air conditioning device 5 with a heating element 4 incorporated.

In winter in particular, the heating can operate normally in mode heating with the air conditioning system 31 off.

In summer in particular, conversely, it is the system 31 which ensures the cooling of room A, while the heating is off.

Let us now describe the process for installing an air conditioning system 31 a room A to cool.

• installer à l'intérieur du local A le condenseur 11 à eau ainsi que les moyens hydrauliques tel que vanne trois voies 8, aptes à permettre ou interdire la circulation d'eau dans le condenseur 11 ;
• installer à l'extérieur du local A les moyens de refroidissement 17 de l'eau du condenseur 11, intérieur, ainsi que les moyens hydrauliques tel que vanne trois voies 14 aptes à permettre ou interdire la circulation dans le refroidisseur 17 ;
• raccorder ce condenseur 11 et les moyens de refroidissement 17 par un réseau de circulation d'eau de chauffage central 3, éventuellement existant dans le local A, et alimentant par ailleurs des éléments de chauffage tels que radiateurs ou convecteurs.

This process comprises at least the steps providing for:

• install inside the room A the water condenser 11 as well as the hydraulic means such as a three-way valve 8, capable of allowing or preventing the circulation of water in the condenser 11;
• install outside the room A the means 17 for cooling the water of the condenser 11, inside, as well as the hydraulic means such as a three-way valve 14 capable of allowing or preventing circulation in the cooler 17;
• connect this condenser 11 and the cooling means 17 by a central heating water circulation network 3, possibly existing in room A, and also supplying heating elements such as radiators or convectors.

Thus, network 3 allows, in air conditioning mode, the circulation of water between the internal condenser 11 and external cooling means 17.

In heating mode, the means 8 and 14 previously installed prohibit the circulation of water in the condenser 11 and the cooler 17, allowing this heating network 3 to maintain a power supply operation for heating elements.

In embodiments such as in FIG. 3, are installed inside a room A to be cooled, several devices 5, and outside room A are installed unique means 17 for cooling the water circulating in at least one condenser 11.

These means 17 are therefore common to the various interior condensers 11.

In FIG. 2, the internal condenser 11 is hydraulically connected to the network 3 in series with respect to a heating element 4.

Its installation is carried out so that the water continues to circulate in this heating element 4 in a so-called "cooling" operating mode or air conditioning.

In FIG. 3, the internal condenser 11 is hydraulically connected to the network 3 in parallel with a heating element 4, so that water circulates exclusively in this condenser, without passing through the element in a mode of operation known as "cooling".

According to an installation step, the electrical connection of the fan evaporator 19, compressor motor 20 and control means, connects these constituents to the energy source S in room A.

During this step, according to the embodiment of FIG. 3, the installation comprises the establishment of signal transmission means 33.

It is obviously planned during installation, to connect the condenser 11 interior with means 10 for thermal break.

According to the embodiment of FIG. 2, the installation method comprises a step equipment of network 3 with a discharge valve 26, and a pump 23.

This allows water to be pressurized in this network, so that the water from condensation coming from an evaporator 18 inside room A, i.e. evacuated by introduction under pressure into the network 3.

As we have seen, the excess water is discharged through the valve 26, avoiding thus overpressures in the network 3.

When installing in room A previously provided with heating central, is performed either a step of substitution of at least one element of heating 4 such as radiator, by an air conditioning device with an element heating incorporated.

Alternatively, a device 5 is mounted in series with the element 4, which is thus maintained.

Claims (29)

1. A method of installing a heating and air conditioning system (31) in a room (A) to be cooled, the system (31) comprising at least one boiler (1) as well as, inside the room (A), at least one evaporator (18), an evaporator fan (19), a compressor (20) and a condenser (11), whilst outside the room the system (31) comprises cooling means (17), the said system being able to function, after installation, either in heating mode or in air conditioning mode ; this method comprising at least the steps making provision for:

   installing inside the room (A) a water-type condenser (11) as well as hydraulic means such as a three-way valve (8) able to allow the circulation of water in the condenser (11) or to prevent it in heating mode;

   installing outside the room (A) means (17) of cooling the water of the internal condenser (11);

   installing inside and/or outside the room hydraulic means such as a three-way valve (14) able to allow circulation in the cooling means (17) or to prevent it in air conditioning mode;

   connecting this condenser (11) and the cooling means (17) by means of a central-heating water circulation system (3), possibly existing in the room (A), able also to supply at least one heating element (4), so that this system (3) allows, in air conditioning mode when the boiler (1) is off, the circulation of water between the internal condenser (11) and the external cooling means (17), and so that in heating mode when the compressor (20) is off, the installed means (8) and (14) prevent the circulation of water in the condenser (11) and the cooler (17), enabling this heating system (3) to preserve functioning involving supply to the heating element (4).
2. A method according to Claim 1, characterised in that there are installed, inside a room (A) to be cooled, several assemblies or chambers each comprising an evaporator (18) and its fan (19), a compressor (20) and a water condenser (11), and/or outside the room (A) there are installed single means (17) of cooling the water in at least one condenser (11), common to at least two internal condensers (11).
3. A method according to Claim 2, characterised in that at least one heating element (4) is installed opposite an evaporator fan (19), so as to be able to increase the thermal diffusion of this element (4) in the room (A), in heating mode.
4. A method according to Claim 2 or 3, characterised in that the installation of at least one internal condenser (11), an evaporator (18) with its fan (19) and a compressor (20) comprises principally a step of connecting a unitary air conditioning device (5), possibly with integral heating means, to the central-heating system (3).
5. A method according to one of Claims 1 to 4, characterised in that at least one internal condenser (11) is hydraulically connected to the heating system (3) in series with respect to a heating element (4) such as a radiator, so as to make it possible for the water to continue to circulate in this heating element (4) in an operating mode referred to as "cooling" or air conditioning, for example the condenser (11) is connected to an output of the heating element (4), the whole with a heating element (4) and a condenser (11), one in series with the other being connected in parallel to the system (3).
6. A method according to one of Claims 1 to 5, characterised in that at least one internal condenser (11) is hydraulically connected to the heating network (3) in parallel to a heating element (4) such as a radiator, so as to enable the water to circulate in this condenser (11), solely without passing through the element (4) in a so-called "cooling" operating mode.
7. A method according to Claim 6, characterised in that at least one internal condenser (11) and a heating element (4) connected in parallel are connected to the central-heating system (3) by connection means (27), for example common, at the input and/or output.
8. A method according to one of Claims 1 to 7, characterised in that means (32) of regulating external cooling (17) are installed, so that the temperature of the water can be regulated, in cooling mode, so as to remain sufficiently high whilst preventing condensation of the ambient steam on the heating system (3).
9. A method according to one of Claims 1 to 8, characterised in that the installation comprises a step of electrical connection of at least one evaporator fan (19), a compressor motor (20), means (8) of preventing the functioning of the compressor (20) in heating mode, and possibly control means (20), to an energy source (S) such as the electrical mains in the room (A).
10. A method according to one of Claims 1 to 8, characterised in that it comprises a step of setting up means (33) of transmitting a signal between internal control means (28) for at least one air-conditioning device (5) in the room (A) and constituents external to the room (A) such as cooling means (17), water circulation pump (2) in the central-heating system (3), mode selection valve (14), discharge valve (26) or the like, for example this step comprising a connection to the electrical mains in the room (A) as a component of the signal transmission means (33).
11. A method according to one of Claims 1 to 10, characterised in that it comprises, during the step of connecting the internal condenser (11), a phase of installing, between the latter (11) and the system (3), heat-bridge rupture means (10) able to prevent, in heating mode, the water in the system (3), then hot, transmitting heat energy by conduction to the condenser (11).
12. A method according to one of Claims 1 to 11, characterised in that it comprises a step of equipping the system (3) with a discharge valve (26) and a pump (23) for pressurising the water in this system (3), so that the condensation water coming from an evaporator inside the air-conditioned room (A) is discharged by introduction under pressure into the heating system (3), and the excess water is evacuated by the discharge valve, thus preventing any overpressure in the system (3).
13. A method according to one of Claims 1 to 12, characterised in that, for an installation in a room (A) previously provided with central heating, it comprises a step of substituting, for at least one heating element (4) such as a radiator, an air conditioning device (5) with a heating element (4) incorporated for example in a chamber and connected to the system (3).
14. An internal air conditioning and possibly heating device (5) comprising at least:

    a first primary refrigerant circulation circuit, and a second secondary water circulation circuit intended to be connected by connection means (27) to a central-heating system (3);

    an evaporator (18) to the primary and an evaporator fan (19);

    a compressor (20) to the primary;

    a water-type condenser (11), for exchange between primary and secondary;

    means (18) of preventing the functioning of the compressor (20) in heating mode ;

    means (28) of controlling the internal device (5); and

    means of electrical connection to the evaporator fan (19), of a compressor motor (20) and possibly of the connection means, to an energy source (S) such as the electrical mains in the room (A),

    characterised in that the device (5) is installed in a room (A) according to the method of one of Claims 1 to 13.
15. A device (5) according to Claim 14, characterised in that it (5) comprises, between the internal condenser (11) and the system (3), heat-bridge rupture means (10).
16. A device (5) according to Claim 15, characterised in that the connection means (27) are at least partly merged with the means (10) of breaking the heat bridge, for example they (27) comprise at least one sleeve for connection to the central-heating system (3), with one or more rupture sections made from insulating material such as synthetic material.
17. A device (5) according to one of Claims 14 to 16, characterised in that, the internal condenser (11) being intended to be hydraulically connected to the heating system (3) in series with respect to a heating element (4) of the room (A) such as a radiator, the connection means (27) comprise a sleeve for connection to an outlet of this heating element (4), for example the device comprises at least one three-way valve on the one hand intended to be connected to the input of this system (3) and on the other hand outlets, one able to be connected to a secondary of the condenser (11), the other being able to be connected to the output of the device to the system (3).
18. A device (5) according to one of Claims 14 to 16, characterised in that the internal condenser (11) is intended to be hydraulically connected to the heating system (3) in parallel to a heating element (4) such as a radiator, so that the water circulates solely in this condenser (11) without passing through this element (4) in cooling mode, the device (5) comprising, at the secondary, selection means (8) able to direct the water from the system (3) either to the heating element (4) or to the condenser (11).
19. A device (5) according to Claim 18, characterised in that it comprises at least one three-way valve on the one hand intended to be connected to the input of this system (3) and on the other hand outlets, one able to be connected to a secondary of the condenser (11), the other being able to be connected to the input of the heating element (4) in parallel, the output of the latter being intended to be connected to the system (3), for example at least one internal condenser (11) and a heating element (4) connected in parallel and intended to be connected to the central-heating system by common inlet and outlet connection means.
20. A device (5) according to one of Claims 14 to 19, characterised in that, in a device (5) where at least one internal condenser (11) and one heating element (4) are connected in parallel, the heating element (4) is installed opposite an evaporator fan (19) so as to be able to increase the thermal diffusion of the heating element (4) in the room (A), in heating mode.
21. A device (5) according to one of Claims 14 to 20, characterised in that it (5) comprises, for example in control means (28), a safety arrangement (30) preventing the functioning in cooling mode of the air conditioner (5), with thermostatic means causing the necessary stoppage of the compressor (20) in heating mode and/or when the temperature of the water upstream of the condenser (11) is greater than a predetermined value, for example around 30°C.
22. An air conditioning and heating system (31), characterised in that it comprises at least one device according to one of Claims 14 to 21 and/or it (31) is installed according to the method of one of Claims 1 to 13.
23. A system (31) according to Claim 22, characterised in that an internal device (5) is integrated in a chamber, which comprises for example a heating element (4).
24. A system (31) according to Claim 23, characterised in that it (31) comprises means (32) of regulating the external cooling means (17), able to ensure that the water temperature can be regulated in air conditioning mode, in order to remain sufficiently high whilst preventing condensation of the ambient steam on the heating system (3).
25. A system (31) according to Claim 24 and comprising at least one heating element (4), characterised in that the regulation means (32) are able to prevent the functioning of the external cooling means (17) in heating mode.
26. A system (31) according to one of Claims 22 to 25, characterised in that it (31) comprises means (33) of transmitting a signal between internal control means (28) of at least one air conditioning device (5) in the room (A) and constituents external to the room (A) such as cooling means (17), water circulation pump (2) in the central-heating system (3), mode selection valve (14), discharge valve (26) or the like, and for example these signal transmission means (33) comprise a connection to the electrical mains in the room (A).
27. A system (31) according to one of Claims 22 to 26, characterised in that the system (3) comprises at least one discharge valve (26) and a pump (2) for pressurising the water in this system (3), so that the condensation water coming from an evaporator (18) inside the air conditioned room (A) is discharged by introduction under pressure into the heating system (3), and the excess water being discharged through the discharge valve (26), thus avoiding overpressure in the system (3).
28. A system (31) according to one of Claims 22 to 27, characterised in that it (31) comprises at least one air conditioning device (5) with an incorporated heating element (4) connected to the central-heating system.
29. A system (31) according to one of Claims 22 to 28, characterised in that, in winter in particular, a heating element (4) functions normally in heating mode with an air-conditioning device (5) stopped, whilst in summer in particular the system (31) functions in cooling mode of the water-type condensers (11) of internal air conditioning chambers, with the heating element (4) stopped.

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