EP2336682A2 - Manifold for a refrigerant circulating within an air conditioning cycle, and air conditioning cycle with such a manifold - Google Patents

Abstract

The block (22) has inlets (E1-E9) providing coolant (FR) e.g. carbon dioxide, at an interior of the block, and outlets (S1-S4) for providing the coolant outside the block, where each outlet is in fluidic relation with the two inlets by a channel (C1). The channel is equipped with a gate (V1) and provided with a recreation unit (D1). One of the outlets, the two inlets, channel, other channel (C2), a valve, the gate and the recreation unit are constituted to form a sub assembly (SE1). An independent claim is also included for an air-conditioning loop comprising a distribution block.

Description

Technical Field of the Invention

The invention is in the field of ventilation, heating and / or air conditioning systems for a motor vehicle. It relates to a distribution block adapted to manage the circulation of a refrigerant inside an air conditioning loop. It also relates to such an air conditioning loop comprising said distribution block.

State of the art

A motor vehicle is commonly equipped with an air conditioning system to modify the aerothermal parameters of the air contained inside the passenger compartment of the vehicle. Such a modification is obtained from the delivery of an interior air flow in the passenger compartment. The air conditioning system comprises a ventilation, heating and / or air conditioning system which channels the circulation of the interior air flow prior to delivery into the passenger compartment. The installation consists of a housing made of plastic material and housed under a dashboard of the vehicle.

To modify a temperature of the interior air flow prior to its evacuation from the housing to the passenger compartment, the air conditioning system comprises an air conditioning loop inside which circulates a refrigerant, such as carbon dioxide known under the designation R744. The air conditioning loop includes a plurality of elements such as a compressor for carrying high pressure refrigerant fluid and an accumulator to prevent an intake of coolant in the liquid state inside the compressor. The air conditioning loop also includes fluid heat exchangers refrigerant / indoor air to allow successive heat transfers between the refrigerant and the indoor air flow. The refrigerant / indoor air heat exchangers are placed inside the installation so as to be traversed by the interior air flow prior to the evacuation of the latter from the housing to the passenger compartment. The air conditioning loop further comprises a detent member interposed between the refrigerant / indoor air heat exchangers, the expansion member being provided for lowering the refrigerant fluid pressure inside the air conditioning loop. The latter also includes a refrigerant / ambient air heat exchanger to allow heat transfer between the refrigerant and a flow of ambient air. The coolant / ambient air heat exchanger is for example placed at the front of the vehicle to facilitate heat transfer between the refrigerant and the ambient air flow, such as a flow of air outside the vehicle. The air conditioning loop finally includes a distribution block to manage the circulation of the refrigerant between the various elements referred to above. For example, we can refer to the document JP6239131 (NIPPON DENSO CO) which describes such an air conditioning system.

The distribution block is able to operate the air conditioning loop in heating mode or in cooling mode. In heating mode, the air conditioning loop allows a warming of the indoor air flow while in air conditioning mode the air conditioning loop is able to cool the latter. The change in operation of the air conditioning loop between these two modes is obtained from a change in the circulation of the refrigerant inside the distribution block between different ports that it comprises. The ports are indifferently either coolant inlets inside the distribution block, or coolant outlets from the distribution block.

More particularly, the distribution block comprises a port A in connection with an output of the compressor and a port B in connection with an input of the accumulator. The distribution block also has a port C in connection with an inlet / outlet of the refrigerant / ambient air heat exchanger and a port D in connection with another inlet / outlet of the refrigerant / ambient air heat exchanger. . Finally, the distribution block also includes a port E in connection with an inlet / outlet of the first refrigerant / indoor air heat exchanger and a port F in connection with an inlet / outlet of the second refrigerant / indoor air heat exchanger.

In heating mode, the refrigerant circulates from port A to port F via a first channel of the distribution block, then flows inside the second refrigerant / indoor air heat exchanger, and at the same time. the inside of the expansion element, then inside the first refrigerant / indoor air heat exchanger, and then takes a second channel of the distribution block which extends between the port E and the port D, then at the The interior of the refrigerant / ambient air heat exchanger then follows a third channel of the distribution block which extends between the port C and the port B, then circulates inside the accumulator to return to the compressor.

In cooling mode, the refrigerant circulates from port A to port C through a fourth channel of the distribution block, then flows inside the refrigerant / ambient air heat exchanger, and then flows a fifth channel of the distribution block which extends between the port D and the port F, then circulates inside the second refrigerant / indoor air heat exchanger, then inside the detent, and then inside the first refrigerant / indoor air heat exchanger, and then takes a sixth channel of the distribution block that extends between port E and port B, then inside the accumulator to return to the compressor .

The first, second, third, fourth, fifth and sixth channels are obtained from the rotation of a cylinder provided with three passages inside a sleeve equipped with said ports.

A problem posed by the use of the distribution block according to JP6239131 lies in the fact that the latter is not able to manage in a simple and effective way the flow of refrigerant between the various elements of the air conditioning loop. More particularly, the fact that some ports of the distribution block are alternately inputs and outputs of refrigerant is a source of malfunction. More particularly, such a distribution block is likely to present risks of refrigerant leakage which it is better to avoid. Finally, such a distribution block is not arranged to allow operation of the air conditioning loop in a dehumidification mode of the indoor air flow.

Object of the invention

The object of the present invention is to provide a distribution block that is able to simply manage the circulation of a refrigerant fluid FR inside an air conditioning loop, the latter being constitutive of an air conditioning system. a motor vehicle, the distribution block being able to effectively determine the path of the refrigerant fluid FR between different components of the air conditioning loop, while minimizing the risk of leakage of the refrigerant FR out of the air conditioning loop. Another object of the present invention is to provide such a distribution block which allows operation of the air conditioning system in different modes, heating mode, air conditioning mode and dehumidification mode in particular, and which is able to perform a simple and reliable changes from one mode to another mode.

A distribution block of the present invention is a distribution block capable of managing the circulation of a refrigerant fluid FR inside an air conditioning loop. The distribution block comprises a plurality of inputs E ₁ , E ₂ , E ₃ , E ₄ , E ₅ , E ₆ , E ₇ , E ₈ , E ₉ of refrigerant FR inside the block of distribution and a plurality of outputs S ₁ , S ₂ , S ₃ , S ₄ of refrigerant FR out of the distribution block. Each output S ₁ , S ₂ , S ₃ , S ₄ is in fluid relation with at least two inputs E ₁ , E ₂ , E ₃ , E ₄ , E ₅ , E ₆ , E ₇ , E ₈ , E ₉ .

The distribution block preferably comprises nine inputs E ₁ , E ₂ , E ₃ , E ₄ , E ₅ , E ₆ , E ₇ , E ₈ , E ₉ and four outputs S ₁ , S ₂ , S ₃ , S ₄ .

A first output S ₁ is advantageously in fluid relation with a first input E ₁ and a second input E ₂ .

The first output S ₁ is advantageously in fluid relation with the first input E ₁ via a first channel C ₁ which is provided with a first expansion member D ₁ .

The first expansion member D ₁ is preferably an electronically controlled expansion device.

The first channel C ₁ is for example equipped with a first valve V ' ₁ .

The first output S ₁ is advantageously in fluid relation with the second input E ₂ via a second channel C ₂ which is provided with a first valve V ₁ .

Preferably, the first output S ₁ , the first input E ₁ , the second input E ₂ , the first channel C ₁ , the second channel C ₂ , the first valve V ₁ , the first valve V ' ₁ and the first D ₁ relaxation are constituting a first subset SE ₁ .

A second output S ₂ is advantageously in fluid relation with a third input E ₃ and a fourth input E ₄ .

The second output S ₂ is advantageously in fluid relation with the third input E ₃ via a third channel C ₃ which is provided with a second expansion member D ₂ .

The second expansion member D ₂ is preferably an electronically controlled expansion device.

The third channel C ₃ is for example equipped with a second valve V ' ₂ .

The second output S ₂ is advantageously in fluid relation with the fourth input E ₄ via a fourth channel C ₄ which is provided with a second valve V ₂ .

Preferably, the second output S ₂ , the third input E ₃ , the fourth input E ₄ , the third channel C ₃ , the fourth channel C ₄ , the second valve V ' ₂ , the second valve V ₂ and the second D ₂ relaxation are constituting a second subset SE ₂ .

A third output S ₃ is advantageously in fluid relation with a fifth input E ₅ , a sixth input E ₆ and a seventh input E ₇ .

The third output S ₃ is advantageously in fluid relation with the fifth input E ₅ via a fifth channel C ₅ which is provided with a third valve V ₃ .

The third output S ₃ is advantageously in fluid connection with the sixth input E ₆ via a sixth channel C ₆ which is provided with a fourth valve V ₄ .

The third output S ₃ is advantageously in fluid connection with the seventh input E ₇ via a seventh channel C ₇ which is provided with a fifth valve V ₅ .

Preferably, the third output S ₃ , the fifth input E ₅ , the sixth input E ₆ , the seventh input E ₇ , the fifth channel C ₅ , the sixth channel C ₆ , the seventh channel C ₇ , the third valve V ₃ the fourth valve V ₄ and the fifth valve V ₅ constitute a third subassembly SE ₃ .

A fourth output S ₄ is advantageously in fluid relation with an eighth input E ₈ and a ninth input E ₉ .

The fourth output S ₄ is advantageously in fluid relation with the eighth input E ₈ via an eighth channel C ₈ which is provided with a sixth valve V ₆ .

The fourth output S ₄ is advantageously in fluid relation with the ninth input E ₉ via a ninth channel C ₉ which is provided with a third expansion element D ₃ .

The third expansion member D ₃ is for example an electronically controlled expansion device.

The ninth channel C ₉ is preferably equipped with a third valve V ' ₃ .

A seventh valve V ₇ is advantageously arranged in parallel with the third expansion member D ₃ and the third valve V ' ₃ .

Preferably, the fourth output S ₄ , the eighth input E ₈ , the ninth input E ₉ , the eighth channel C ₈ , the ninth channel C ₉ , the sixth valve V ₆ , the seventh valve V ₇ , the third valve V ' ₃ and the third expansion member D ₃ constitute a fourth subset SE ₄ .

Such a distribution block is advantageously used to manage the circulation of the refrigerant fluid FR inside the air conditioning loop.

An air conditioning loop of the present invention is mainly recognizable in that the air conditioning loop includes such a distribution block.

The air conditioning loop advantageously comprises a refrigerant / heat transfer fluid heat exchanger, a refrigerant / heat transfer fluid heat exchanger, a refrigerant / ambient air heat exchanger, an internal heat exchanger and a compressor associated with an accumulator.

The refrigerant / ambient air heat exchanger advantageously comprises a refrigerant discharge orifice FR which is in fluid connection with the seventh inlet E ₇ and the eighth inlet E ₈

The refrigerant / ambient air heat exchanger advantageously comprises a refrigerant fluid intake orifice FR which is in fluid relation with the first outlet S ₁ .

The coolant / heat transfer fluid heat exchanger advantageously comprises a coolant outlet orifice FR which is in fluid connection with the sixth inlet E ₆ and the ninth inlet E ₉ .

The coolant / heat transfer fluid heat exchanger advantageously comprises a refrigerant fluid inlet orifice FR which is in fluid connection with the second outlet S ₂ .

The internal heat exchanger advantageously comprises a high pressure outlet which is in fluid relation with the first inlet E ₁ and the third inlet E ₃ .

The internal heat exchanger advantageously comprises a high pressure inlet which is in fluid relation with the third outlet S ₃ .

The internal heat exchanger advantageously comprises a low pressure outlet which is in fluid connection with a refrigerant fluid inlet FR inside the compressor.

The internal heat exchanger advantageously comprises a low pressure inlet which is in fluidic relation with a refrigerant outlet FR out of the accumulator.

The accumulator advantageously comprises a refrigerant fluid inlet orifice FR which is in fluid relation with the outlet S ₄ .

The coolant / heat transfer fluid heat exchanger advantageously comprises an opening for receiving the refrigerant fluid FR which is in fluid relation with the compressor.

The heat exchanger / coolant heat exchanger advantageously comprises an opening for discharging the refrigerant fluid FR to the second inlet E ₂ , the fourth inlet E ₄ and the fifth inlet E ₅ .

• une première vanne trois-voies qui est interposée entre l'échangeur de chaleur fluide réfrigérant / fluide caloporteur, la cinquième entrée E₅, la quatrième entrée E₄ et la deuxième entrée E₂,
• une deuxième vanne trois-voies qui est interposée entre la première vanne trois-voies, la quatrième entrée E₄ et la deuxième entrée E₂,
• une troisième vanne trois-voies qui est interposée entre un orifice d'évacuation de fluide réfrigérant FR hors de l'échangeur de chaleur fluide réfrigérant / air ambiant, la septième entrée E₇ et la huitième entrée E₈,
• une quatrième vanne trois-voies qui est interposée entre un orifice de sortie de fluide réfrigérant FR hors de l'échangeur de chaleur fluide réfrigérant / liquide caloporteur, la sixième entrée E₆ et la neuvième entrée E₉,
• une cinquième vanne trois-voies qui est interposée entre une sortie haute pression de fluide réfrigérant FR hors de l'échangeur de chaleur interne, la première entrée E₁ et la troisième entrée E₃.

The air conditioning loop preferably comprises at least one of five three-way valves including:

• a first three-way valve which is interposed between the coolant / heat transfer fluid heat exchanger, the fifth input E ₅ , the fourth input E ₄ and the second input E ₂ ,
• a second three-way valve which is interposed between the first three-way valve, the fourth inlet E ₄ and the second inlet E ₂ ,
• a third three-way valve which is interposed between a refrigerant discharge orifice FR out of the refrigerant / ambient air heat exchanger, the seventh input E ₇ and the eighth input E ₈ ,
• a fourth three-way valve which is interposed between a refrigerant fluid outlet orifice FR out of the refrigerant / heat-transfer liquid heat exchanger, the sixth input E ₆ and the ninth input E ₉ ,
• a fifth three-way valve which is interposed between a high pressure refrigerant output FR out of the internal heat exchanger, the first input E ₁ and the third input E ₃ .

Description of the figures.

• La fig.1 est une vue schématique d'un système de climatisation selon une première variante de la présente invention.
• Les fig.2 à fig.4 sont des vues schématiques du système de climatisation illustré sur la figure précédente selon des modes respectifs de fonctionnement.
• La fig.5 est une vue schématique d'un système de climatisation selon une deuxième variante de la présente invention.
• Les fig.6 à fig.8 sont des vues schématiques du système de climatisation illustré sur la figure précédente selon des modes respectifs de fonctionnement.
• La fig.9 est une vue schématique d'un système de climatisation selon une troisième variante de la présente invention.
• Les fig.10 à fig.12 sont des vues schématiques du système de climatisation illustré sur la figure précédente selon des modes respectifs de fonctionnement.

The present invention will be better understood on reading the description which will be given of exemplary embodiments, in relation to the figures of the appended plates, in which:

• The fig.1 is a schematic view of an air conditioning system according to a first variant of the present invention.
• The fig.2 to fig.4 are schematic views of the air conditioning system illustrated in the previous figure according to respective modes of operation.
• The fig.5 is a schematic view of an air conditioning system according to a second variant of the present invention.
• The fig.6 to fig.8 are schematic views of the air conditioning system illustrated in the previous figure according to respective modes of operation.
• The fig.9 is a schematic view of an air conditioning system according to a third variant of the present invention.
• The fig.10 to fig.12 are schematic views of the air conditioning system illustrated in the previous figure according to respective modes of operation.

In the figures, a motor vehicle is equipped with an air conditioning system 1 for modifying the aerothermal parameters of the air contained inside the passenger compartment. Such a modification is obtained from the delivery inside the passenger compartment of an interior air flow 2.

• une installation de ventilation de chauffage et/ou de climatisation 3 apte à canaliser la circulation du flux d'air intérieur 2 préalablement à sa délivrance à l'intérieur de l'habitacle,
• une boucle de climatisation 4 à l'intérieur de laquelle circule un fluide réfrigérant FR, préférentiellement supercritique, tel que le dioxyde de carbone connu sous l'appellation R744, ou tel qu'un composé azéotropique connu sous l'appellation HFO-1234 yf,
• une première boucle secondaire 5, représentée en trait pointillé sur les fig.1, fig.5 et fig.9, à l'intérieur de laquelle circule un fluide caloporteur FC, tel qu'un mélange d'eau et de glycol, et
• une deuxième boucle secondaire 6, représentée en trait alterné point-trait sur la fig.1, fig.5 et fig.9 à l'intérieur de laquelle circule un liquide caloporteur LC, tel qu'un mélange d'eau et de glycol.

For this purpose, the air conditioning system 1 comprises:

• a ventilation system for heating and / or air conditioning 3 adapted to channel the circulation of the interior air flow 2 prior to its delivery to the interior of the passenger compartment,
• an air-conditioning loop 4 inside which circulates a refrigerant fluid FR , preferably supercritical, such as carbon dioxide known under the name R744, or such as an azeotropic compound known under the name HFO-1234 yf,
• a first secondary loop 5, represented in dashed line on the fig.1 , fig.5 and fig.9 inside which circulates a coolant FC , such as a mixture of water and glycol, and
• a second secondary loop 6, represented in alternating dot-dash line on the fig.1 , fig.5 and fig.9 inside which circulates an LC heat transfer liquid, such as a mixture of water and glycol.

The heating ventilation installation and / or air conditioning 3 consists mainly of a housing 7 made of plastic and housed generally under a dashboard of the vehicle. Said installation 3 houses a blower 8 for circulating the interior air flow 2 from at least one air intake opening 9 to at least one air outlet opening 10 that the housing 7 comprises. air evacuation 10 allows a delivery of the interior air flow 2 out of the housing 7 to the passenger compartment of the vehicle.

In order to allow a modification of the temperature of the interior air flow 2 prior to its delivery into the passenger compartment, said installation 3 houses a first heat transfer fluid / indoor air flow heat exchanger 11 for allow a heat transfer between the heat transfer fluid FC and the interior air flow 2, and a second heat exchanger liquid coolant / indoor air flow 12 to allow heat transfer between the heat transfer liquid LC and the indoor air flow 2 .

The first heat exchanger coolant / indoor air flow 11 is constitutive of the first secondary loop 5. The latter also comprises a refrigerant fluid heat exchanger / heat transfer fluid 13 to allow a heat transfer between the refrigerant fluid FR and the heat transfer fluid FC . Finally, the first secondary loop 5 comprises a first pump P ₁ for circulating the coolant FC between the first heat exchanger heat transfer fluid / indoor air flow 11 and the heat exchanger fluid coolant / heat transfer fluid 13.

The second liquid heat exchanger / indoor air flow 12 is the second secondary loop 6. The latter also comprises a refrigerant / heat transfer liquid heat exchanger 14 to allow a heat transfer between the refrigerant fluid FR and the coolant LC . Finally, the second secondary loop 6 includes a second pump P ₂ for circulating the heat transfer fluid LC between the second liquid heat exchanger heat / indoor air flow 12 and the heat exchanger fluid coolant / heat transfer liquid 14.

The refrigerant / heat transfer fluid heat exchanger 13 and the refrigerant / heat transfer liquid heat exchanger 14 also constitute the air conditioning loop 4 to allow a heat transfer between the refrigerant fluid FR and the heat transfer fluid FC and the heat transfer fluid respectively. LC heat transfer fluid.

The air conditioning loop 4 also includes a compressor 15 for carrying the refrigerant fluid FR at a high pressure. The compressor 15 is preferably associated with an accumulator 16 to prevent an intake of refrigerant fluid FR in the liquid state inside the compressor 15. The air conditioning loop 4 also comprises a refrigerant / ambient air heat exchanger 17 to allow heat transfer between the refrigerant fluid FR and a flow of ambient air 18 therethrough. The latter is in particular a flow of air outside the vehicle. The coolant / ambient air heat exchanger 17 is preferably placed at the front of the vehicle to facilitate the heat transfer between the refrigerant fluid FR and the ambient air flow 18. The air conditioning loop 4 also comprises a plurality of expansion members D ₁ , D ₂ , D ₃ to allow expansion of the refrigerant fluid FR from the high pressure to a low pressure. The expansion members D ₁ , D ₂ , D ₃ are in particular electronically controlled expansion devices. Thus, the air conditioning loop 4 comprises a plurality of high pressure lines HP ₁ , HP ₂ , HP ₃ formed between the compressor 15 and at least one of the expansion members D ₁ , D ₂ , D ₃ and a plurality low pressure lines BP ₁ , BP ₂ , BP ₃ formed between at least one of the expansion members D ₁ , D ₂ , D ₃ and the compressor. Finally, the air-conditioning loop 4 comprises an internal heat exchanger 19 which comprises a high-pressure channel 20 and a low-pressure channel 21 to allow thermal transfer between the refrigerant fluid FR circulating inside the high-pressure channel 20 and the fluid FR refrigerant flowing inside the low pressure channel 21. According to various operating modes of the air conditioning loop 4, the high pressure channel 20 is part of one of the high pressure lines HP ₁ , HP ₂ , HP ₃ while that the low pressure channel 21 is constitutive of one of the low pressure lines BP ₁ , BP ₂ , BP ₃ .

The air conditioning loop 4 is able to operate in heating mode in which the interior air flow 2 is heated by the first heat exchanger heat transfer fluid / indoor air flow 11 and the second liquid heat exchanger coolant / indoor air flow 12. The air conditioning loop 4 is also able to operate in air conditioning mode in which the interior air flow 2 is cooled by the second liquid heat exchanger heat / air flow interior 12, the first heat exchanger heat transfer fluid / indoor air flow 11 being inoperative. Finally, the air conditioning loop is able to operate in dehumidification mode in which the interior air flow 2 is first cooled by the second heat exchanger / heat transfer fluid 12 air, then heated by the first fluid heat exchanger coolant / indoor airflow 11.

To allow a simple and effective management of the circulation of the refrigerant fluid FR inside the air conditioning loop 4, and this whatever the mode of operation of the latter, while minimizing the risk of refrigerant leakage FR , the The present invention proposes to equip the air conditioning loop 4 of a distribution block 22 having nine inputs E ₁ , E ₂ , E ₃ , E ₄ , E ₅ , E ₆ , E ₇ , E ₈ , E ₉ coolant FR within said block 22 and four outputs S ₁ , S ₂ , S ₃ , S ₄ of refrigerant FR out of said block 22. The latter is a unitary element that can be handled in one piece. Nevertheless, the distribution block 22 consists of four separate subsets SE ₁ , SE ₂ , SE ₃ , SE ₄ assembled to each other by bolting, interlocking or any other similar fastening means. Two of these subsets SE ₁ , SE ₂ , SE ₃ , SE ₄ , namely the first subset SE ₁ and the second subset SE ₂ , are similar which reduces manufacturing and maintenance costs.

The first subset SE ₁ comprises a first inlet E ₁ and a second inlet E ₂ of refrigerant FR inside said block 22 and a first outlet S ₁ of refrigerant FR outside said block 22. The first outlet S ₁ is in fluid communication with the first input E ₁ and the second input E ₂ . More particularly, a first channel C ₁ is formed between the first input E ₁ and the first output S ₁ to allow a flow of refrigerant FR from the first input E ₁ to the first output S ₁ . More particularly still, a second channel C ₂ is provided between the second inlet E ₂ and the first outlet S ₁ to allow a flow of the fluid refrigerant FR from the first input E ₂ to the first output S ₁ . The first channel C ₁ is provided with the first expansion member D ₁ while the second channel C ₂ is equipped with a first valve V ₁ able to allow or prohibit a passage of the refrigerant fluid FR inside the second channel C ₂ .

The second subset SE ₂ comprises a third input E ₃ and a fourth input E ₄ of coolant FR inside said block 22 and a second output S ₂ refrigerant FR out of said block 22. The second output S ₂ is in fluid communication with the third input E ₃ and the fourth input E ₄ . More particularly, a third channel C ₃ is formed between the third input E ₃ and the second output S ₂ to allow a flow of refrigerant FR from the third input E ₃ to the second output S ₂ . More particularly still, a fourth channel C ₄ is formed between the fourth input E ₄ and the second output S ₂ to allow a flow of refrigerant FR from the fourth input E ₄ to the second output S ₂ . The third channel C ₃ is provided with the second expansion member D ₂ while the fourth channel C ₄ is equipped with a second valve V ₂ able to allow or prohibit a passage of the refrigerant fluid FR inside the fourth channel C ₄ .

The third subassembly SE ₃ comprises a fifth input E ₅ , a sixth input E ₆ and a seventh input E ₇ of refrigerant FR inside said block 22 and a third outlet S ₃ of refrigerant FR outside said block 22. The third output S ₃ is in fluid communication with the fifth input E ₅ , the sixth input E ₆ and the seventh input E ₇ . More particularly, a fifth channel C ₅ is formed between the fifth input E ₅ and the third output S ₃ to allow a flow of refrigerant FR from the fifth input E ₅ to the third output S ₃ . More particularly, a sixth channel C ₆ is formed between the sixth input E ₆ and the third output S ₃ to allow a flow of refrigerant FR from the sixth input E ₆ to the third output S ₃ . More particularly, finally, a seventh channel C ₇ is arranged between the seventh input E ₇ and the third output S ₃ to allow a flow of the fluid refrigerant FR from the seventh input E ₇ to the third output S ₃ . The fifth channel C ₅ is provided with a third valve V ₃ adapted to allow or prohibit a passage of the refrigerant fluid FR inside the fifth channel C ₅ . The sixth channel C ₆ is provided with a fourth valve V ₄ adapted to allow or prohibit a passage of the refrigerant fluid FR inside the sixth channel C ₆ . The seventh channel C ₇ is provided with a fifth valve V ₅ adapted to allow or prohibit a passage of the refrigerant fluid FR inside the seventh channel C ₇ .

The fourth subassembly SE ₄ comprises an eighth input E ₈ and a ninth refrigerant inlet E ₉ FR inside said block 22 and a fourth outlet S ₄ of refrigerant FR outside said block 22. The fourth output S ₄ is in fluid communication with the eighth input E ₈ and the ninth input E ₉ . More particularly, an eighth channel C ₈ is provided between the eighth input E ₈ and the fourth output S ₄ to allow a flow of refrigerant FR from the eighth input E ₈ to the fourth output S ₄ . More particularly still, a ninth channel C ₉ is provided between the ninth input E ₉ and the fourth output S ₄ to allow a flow of refrigerant FR from the ninth input E ₉ to the fourth output S ₄ . The eighth channel C ₈ is provided with a third valve V ₃ adapted to allow or prohibit a passage of the refrigerant fluid FR inside the eighth channel C ₈ . The ninth channel C ₉ is equipped with the third expansion member D ₃ . A fourth valve V ₄ is placed in parallel with the third expansion member D ₃ to allow circulation of the refrigerant FR between the ninth input E ₉ and the fourth output S ₄ from a bypass of the third expansion member D ₃ .

The refrigerant / ambient air heat exchanger 17 comprises a refrigerant discharge orifice FR which is in fluid connection with the seventh input E ₇ and the eighth input E ₈ . The fluid heat exchanger coolant / ambient air 17 also includes an inlet port 24 of refrigerant fluid FR which is in fluid connection with the first output S _1.

The refrigerant / heat transfer liquid heat exchanger 14 has a refrigerant fluid outlet orifice FR which is in fluid connection with the sixth input E ₆ and the ninth input E ₉ . The refrigerant / heat transfer fluid heat exchanger 14 also comprises an inlet orifice 26 for refrigerant fluid FR which is in fluid relation with the second outlet S ₂ .

The internal heat exchanger 19 has a high pressure outlet 27 which is in fluid relation with the first inlet E ₁ and the third inlet E ₃ . The internal heat exchanger 19 also has a high pressure inlet 28 which is in fluid connection with the third outlet S ₃ . The high pressure outlet 27 and the high pressure inlet 28 are fluidly connected to one another via the high pressure channel 20. At the same time, the internal heat exchanger 19 has a low pressure outlet 29 which is in fluid relation with a refrigerant fluid inlet of the compressor 15. The internal heat exchanger 19 also has a low pressure inlet 30 which is in fluid connection with a refrigerant outlet FR out of the accumulator 16. The low output pressure 29 and the low pressure inlet 30 are fluidly connected to each other via the low pressure channel 21. The high pressure channel 20 and the low pressure channel 21 are arranged with respect to each other. the other so as to allow heat transfer between the refrigerant FR flowing inside one of the channels 20, 21 and the refrigerant FR flowing inside of the other channel 21,20.

The accumulator 16 also comprises an inlet orifice 31 of the refrigerant fluid FR from the outlet S ₄ .

The coolant / heat transfer fluid heat exchanger 13 receives the refrigerant fluid FR from the compressor 15 to evacuate it to the second input E ₂ or the fourth input E ₄ or the fifth input E ₅ with which the refrigerant / heat transfer fluid heat exchanger 13 is in fluidic relation.

On the fig.1 to fig.4 , the first expansion member D ₁ , the second expansion member D ₂ and the third expansion member D ₃ are able to allow or prohibit a passage of the refrigerant fluid FR inside the channel C ₁ , C ₂ , C ₃ to which they are respectively assigned.

On the fig.5 to fig.12 , the first expansion member D ₁ , the second expansion member D ₂ and the third expansion member D ₃ are not able to prevent the passage of the refrigerant fluid FR inside the channel C ₁ , C ₂ , C ₃ to which they are respectively assigned.

On the fig.5 to fig.8 a first valve V ' ₁ is interposed on the first channel C ₁ between the first expansion member D ₁ and the first inlet E ₁ . The first valve V ' ₁ is able to allow or prohibit a passage of the refrigerant fluid FR inside the first channel C ₁ . Similarly, a second valve V ' ₂ is interposed on the third channel C ₃ between the second expansion member D ₂ and the third inlet E ₃ . The second valve V ' ₂ is able to allow or prohibit a passage of the refrigerant fluid FR inside the third channel C ₃ . Finally, a third valve V ' ₃ is interposed on the ninth C ₉ channel between the third expansion member D ₃ and the ninth input E ₉ . The third valve V ' ₃ is able to allow or prohibit a passage of the refrigerant fluid FR inside the ninth channel C ₉ .

On the fig.9 to fig.12 a first three-way valve 33 is interposed between the refrigerant / heat transfer fluid heat exchanger 13, the fifth input E ₅ , the fourth input E ₄ and the second input E ₂ to enable the refrigerant FR coming from the refrigerant / heat transfer fluid heat exchanger 13 flows to the fifth input E ₅ or to the fourth input E ₄ and the second input E ₂ . A second three-way valve 34 is interposed between the first three-way valve 33, the fourth input E ₄ and the second input E ₂ , to allow the refrigerant FR from the first three-way valve 33 to flow to the fourth input E ₄ or the second input E ₂ . A third three-way valve 35 is interposed between the refrigerant discharge orifice FR outside the refrigerant / ambient air heat exchanger 17 and the seventh input E ₇ and the eighth input E ₈ to allow the FR refrigerant from the refrigerant / ambient air heat exchanger 17 to flow to the seventh input E ₇ or the eighth input E ₈ . A fourth three-way valve 36 is interposed between the refrigerant fluid outlet orifice FR out of the refrigerant / heat transfer liquid heat exchanger 14 and the sixth input E ₆ and the ninth input E ₉ to allow the fluid refrigerant FR from the refrigerant / heat transfer fluid heat exchanger 14 to flow to the sixth input E ₆ or the ninth input E ₉ . Finally, a fifth three-way valve 37 is interposed between the high-pressure outlet 27 of refrigerant FR outside the internal heat exchanger 19 and the first inlet E ₁ and the third inlet E ₃ , to allow the refrigerating fluid FR from the internal heat exchanger 19 to flow to the first input E ₁ and the third input E ₃ .

On the fig.2 to fig.4 , fig.6 to fig.8 and fig.10 to fig.12 is shown the air conditioning system 1 according to different modes of operation. The lines in which the refrigerating fluid FR circulates and in dashed lines show the pipes in which the refrigerant fluid FR does not circulate are shown in solid lines.

On the fig.2 , fig.6 and fig.10 , the air conditioning system 1 operates in heating mode of the indoor air flow 2. In this mode, the first valve V ₁ is closed, the second valve V ₂ is open, the third valve V ₃ is closed, the fourth valve V ₄ is open, the fifth valve V ₅ is closed, the sixth valve V ₆ is open and the seventh valve V ₇ is closed. Moreover, the two pumps P ₁ and P ₂ are started. On the fig.2 , the first relaxing organ D ₁ is open, the second expansion member D ₂ is closed and the third expansion member D ₃ is closed. On the fig.6 , the first valve V ' ₁ is open, the second valve V' ₂ is closed and the third valve V ' ₃ is closed. On the fig.10 , the first three-way valve 33 allows a passage of the refrigerant fluid FR to the second three-way valve 34 and prohibits such passage to the fifth inlet E ₅ . The second three-way valve 34 allows a passage of the refrigerant fluid FR to the fourth input E ₄ and prohibits such passage to the second input E ₂ . The third three-way valve 35 allows a passage of the refrigerant fluid FR to the eighth input E ₈ and prohibits such passage to the seventh input E ₇ . The fourth three-way valve 36 allows a passage of the refrigerant fluid FR to the sixth input E ₆ and prohibits such passage to the ninth entry E ₉ . The fifth three-way valve 37 allows a passage of the refrigerant fluid FR to the first inlet E ₁ and prohibits such passage to the third inlet E ₃ .

Thus, in heating mode, the compressor 15 receives the refrigerant fluid FR in the gaseous state to compress it at a high pressure, in particular a supercritical pressure, and direct it towards the refrigerant / heat transfer fluid heat exchanger 13. is arranged to allow a relatively constant pressure heat transfer from the coolant FR to the heat transfer fluid FC which transmits this heat to the inner air stream 2 via said first heat exchanger 11. Then, the refrigerant FR enters inside the distribution block 22 via the fourth input E ₄ , to flow inside the fourth channel C ₄ and the second valve V ₂ to the second outlet S ₂ . Then, the refrigerant fluid FR flows through the refrigerant / heat transfer fluid heat exchanger 14 by giving heat to the heat transfer fluid LC which transmits this heat to the inner air stream 2 via said second heat exchanger 12. The temperature of the coolant LC is lower than the temperature of the heat transfer fluid FC . Also, the second heat exchanger 12 is placed upstream of the first heat exchanger 11 in a flow direction 32 of the inner air flow 2 inside the casing 7, so that the heat transfer between the heat transfer liquid LC and the internal air flow 2 constitutes a preheating of the latter prior to its heating through the first heat exchanger 11. The refrigerant fluid FR then enters the interior of the distribution block 22 via the sixth input E ₆ to circulate inside the sixth channel C ₆ and the fourth valve V ₄ to the third output S ₃ . Then, the refrigerant fluid FR circulates inside the high pressure channel 20 of the internal heat exchanger 19 so as to give heat to the refrigerant fluid FR flowing inside the low pressure channel 21. Then, the fluid FR refrigerant returns to the distribution block 22 through the first inlet E ₁ to flow inside the first channel C ₁ to the first expansion member D ₁ . The refrigerant fluid FR undergoes a relaxation from the high pressure to the low pressure. The refrigerating fluid FR is discharged from the distribution block 22 via the first outlet S ₁ until it penetrates inside the refrigerant / ambient air heat exchanger 17 inside which the cooling fluid receives heat transferred by the ambient air flow 18. The refrigerant FR then joins the distribution block 22 via the eighth input E ₈ to circulate inside the eighth channel C ₈ and the sixth valve V ₆ to the fourth output S ₄ . The refrigerant fluid FR then enters the interior of the accumulator 16 inside which the refrigerant fluid FR in the liquid state is stored while the refrigerant fluid FR in the gaseous state is discharged to the low-pressure channel 21 of the internal heat exchanger 19, before returning to the compressor 15.

These arrangements are such that, in heating mode, the first low-pressure line BP ₁ comprises in this order the first output S ₁ , the refrigerant / ambient air heat exchanger 17, the eighth input E ₈ , the eighth channel C ₈ provided with of the sixth valve V ₆ , the fourth output S ₄ , the accumulator 16 and the low pressure channel 21 of the internal heat exchanger 19 to reach the compressor 15. The first high pressure line HP ₁ comprises in this order the first heat exchanger refrigerant / heat transfer fluid 13, the fourth input E ₄ , the fourth channel C ₄ provided with the second valve V ₂ , the second output S ₂ , the refrigerant / heat transfer liquid heat exchanger 14, the sixth input E ₆ , the sixth channel C ₆ provided with the fourth valve V ₄ , the third output S ₃ , the high pressure channel 20 of the internal heat exchanger 19, the first input E ₁ and the first channel C ₁ to the expansion member D ₁ .

On the fig.3 , fig.7 and fig.11 , the air conditioning system 1 operates in air conditioning mode, that is to say in a mode provided for cooling the interior air flow 2. In this mode, the first valve V ₁ is open, the second valve V ₂ is closed, the third valve V ₃ is closed, the fourth valve V ₄ is closed, the fifth valve V ₅ is open, the sixth valve V ₆ is closed and the seventh valve V ₇ is open. Moreover, the first pump P ₁ is not started while the second pump P ₂ is turned on. On the fig.3 , the first expansion member D ₁ is closed, the second expansion member D ₂ is open, the third expansion member D ₃ is closed. On the fig.7 the first valve V ' ₁ is closed, the second valve V' ₂ is open and the third valve V ' ₃ is closed. On the fig.11 , the first three-way valve 33 allows a passage of the refrigerant fluid FR to the second three-way valve 34 and prohibits such passage to the fifth inlet E ₅ . The second three-way valve 34 allows a passage of the refrigerant fluid FR to the second inlet E ₂ and prohibits such passage to the fourth inlet E ₄ . The third three-way valve 35 allows a passage of the refrigerant fluid FR to the seventh input E ₇ and prohibits such passage to the eighth entry E ₈ . The fourth three-way valve 36 allows a passage of the refrigerant fluid FR to the ninth input E ₉ and prohibits such passage to the sixth input E ₆ . The fifth three-way valve 37 allows a passage of the refrigerant fluid FR to the third input E ₃ and prohibits such passage to the first input E ₁ .

Thus, in air-conditioning mode, the compressor 15 receives the refrigerating fluid FR in the gaseous state to compress it at a high pressure, in particular a super-critical pressure, and direct it towards the refrigerant / coolant heat exchanger 13. The pump P ₁ being stopped, the heat transfer inside the heat exchanger refrigerant fluid / heat transfer fluid 13 between the refrigerant fluid FR and the heat transfer fluid FC is minimized, or even zero. Then, the refrigerant fluid FR enters the inside of the distribution block 22 via the second inlet E ₂ , to circulate inside the second channel C ₂ and the first valve V ₁ to the first output S ₁ . Then, the refrigerant fluid FR flows inside the refrigerant / ambient air heat exchanger 17 inside which the refrigerant fluid FR gives heat to the ambient air stream 18 at a relatively constant pressure. The refrigerant fluid FR then enters the interior of the distribution block 22 via the seventh inlet E ₇ to flow inside the seventh channel C ₇ and the fifth valve V ₅ to the third outlet S ₃ . Then, the refrigerant fluid FR circulates inside the high pressure channel 20 of the internal heat exchanger 19 so as to give heat to the refrigerant fluid FR circulating inside the low pressure channel 21. The refrigerant FR then enters the interior of the distribution block 22 via the third input E ₃ to circulate inside the third channel C ₃ and the second expansion member D ₂ . The refrigerant fluid FR undergoes a relaxation from the high pressure to the low pressure. Then, the refrigerant fluid FR circulates inside the refrigerant / heat transfer fluid heat exchanger 14 by sensing heat to coolant liquid LC which cools. The coolant liquid LC is then able to cool the interior air flow 2 through said second heat exchanger 12. The refrigerant fluid FR then enters the interior of the distribution block 22 through the ninth input E ₉ to circulate inside the ninth channel C ₉ and the seventh valve V ₇ to the fourth output S ₄ . The refrigerant fluid FR then enters the interior of the accumulator 16 inside which the refrigerant fluid FR in the liquid state is stored while the refrigerant fluid FR in the gaseous state is discharged to the low-pressure channel 21 of the internal heat exchanger 19, before returning to the compressor 15.

These provisions are such that in cooling mode the second low pressure line BP ₂ comprises in this order the second output S ₂ , the second refrigerant / heat-transfer liquid heat exchanger 14, the ninth input E ₉ , the seventh valve V ₇ , the fourth output S ₄ , the accumulator 16 and the low-pressure channel 21 of the internal heat exchanger 19 to arrive at the compressor 15. The second HP high pressure line ₂ comprises the first refrigerant / heat transfer fluid heat exchanger 13, the second inlet E ₂ , the first valve V ₁ , the first outlet S ₁ , the refrigerant / ambient air heat exchanger 17, the seventh input E ₇ , the seventh channel C ₇ provided with the fifth valve V ₅ , the high pressure channel 20 of the internal heat exchanger 19, the third input E ₃ and the third channel C ₃ to the second expansion element D ₂ .

On the fig.4 , fig.8 and fig.12 , the air conditioning system 1 operates in dehumidification mode, that is to say in a mode provided to first cool the indoor air flow 2, and then warm it. In this mode, the first valve V ₁ is closed, the second valve V ₂ is closed, the third valve V ₃ is open, the fourth valve V ₄ is closed, the fifth valve V ₅ is closed, the sixth valve V ₆ is open and the seventh valve V ₇ is closed. Moreover, the first pump P ₁ and the second pump P ₂ are started. On the fig.4 , the first expansion member D ₁ is open, the second expansion member D ₂ is open, the third expansion member D ₃ is open. On the Fig. 8 , the first valve V ' ₁ is open, the second valve V' ₂ is open and the third valve V ' ₃ is open. On the fig.12 , the first three-way valve 33 allows a passage of the refrigerant fluid FR to the fifth inlet E ₅ and prohibits such passage to the second three-way valve 34. The third three-way valve 35 allows a passage of the refrigerant fluid FR to the eighth entry E ₈ and prohibits such a passage to the seventh entry E ₇ . The fourth three-way valve 36 allows a passage of the refrigerant fluid FR to the ninth input E ₉ and prohibits such passage to the sixth input E ₆ . The fifth three-way valve 37 allows a passage of the refrigerant fluid FR to the third input E ₃ and to the first input E ₁ .

Thus, in dehumidification mode, the compressor 15 receives the refrigerant fluid FR in the gaseous state to compress it at a high pressure, in particular super-critical, and direct it towards the refrigerant / heat transfer fluid heat exchanger 13. The latter is arranged to allow a relatively constant pressure heat transfer from the coolant FR to the heat transfer fluid FC which transmits this heat to the inner air stream 2 via said first heat exchanger 11. Then, the refrigerant FR enters inside the distribution block 22 via the fifth input E ₅ , to circulate inside the fifth channel C ₅ and the third valve V ₃ to the third output S ₃ . Then, the refrigerant fluid FR circulates inside the high pressure channel 20 of the internal heat exchanger 19 so as to give heat to the refrigerant fluid FR circulating inside the low pressure channel 21. The refrigerant FR is then split into two fractions FR1 and FR2 .

A first fraction FR1 returns to the distribution block 22 via the first input E ₁ to flow inside the first channel C ₁ to the first expansion member D ₁ . The first FR1 fraction then undergoes a relaxation from high pressure to low pressure. Then, the first FR1 fraction is discharged from the distribution block 22 via the first outlet S ₁ to join the refrigerant / ambient air heat exchanger 17 inside which the first FR1 fraction captures heat to the ambient air flow 18. Then, the first fraction FR1 returns to the distribution block 22 via the eighth input E ₈ . The first fraction FR1 then flows inside the eighth channel C ₈ and the sixth valve V ₆ to reach the fourth output S ₄ .

A second fraction FR2 returns to the distribution block 22 via the third input E ₃ to circulate inside the third channel C ₃ to the second expansion member D ₂ . The second fraction FR2 then undergoes a relaxation from the high pressure to an intermediate pressure. Then second fraction FR2 is discharged from the distribution block 22 via the second outlet S ₂ to join the refrigerant / heat transfer liquid heat exchanger 14 inside which the second fraction FR2 captures heat to the heat transfer liquid LC that cools. The coolant liquid LC is then able to cool the internal air flow 2 through said second heat exchanger 12. The latter being placed upstream of said first heat exchanger 11 in the direction of flow 32 of the air flow inside the housing 7, the inner air stream 2 is first cooled by the second heat exchanger 12, and then heated by the first heat exchanger 11. These provisions allow dehumidification of the indoor air flow 2. The second fraction FR2 then returns to the interior of the distribution block 22 via the ninth input E ₉ to circulate inside the ninth channel C ₉ and the third expansion member D ₃ . The second fraction FR2 then undergoes a relaxation from the intermediate pressure to the low pressure. The second fraction FR2 then flows to the fourth output S ₄ .

At the second outlet S ₄ , the first fraction FR1 and the second fraction FR2 join to then flow to the accumulator 16. The refrigerant fluid FR then enters the inside of the accumulator 16 inside which the refrigerant FR in the liquid state is stored while the refrigerant fluid FR in the gaseous state is discharged to the low pressure channel 21 of the internal heat exchanger 19, before returning to the compressor 15.

These provisions are such that in dehumidification mode the third high pressure line HP ₃ comprises in this order the first heat exchanger fluid coolant / heat transfer fluid 13, the fifth input E ₅ , the fifth channel C ₅ provided with the third valve V ₃ , the third output S ₃ , the high pressure channel 20 of the internal heat exchanger 19, then firstly the first input E ₁ and the first channel C ₁ to the first expansion member D ₁ , and on the other hand the third input E ₃ and the third channel C ₃ to the second detent D ₂ . The third low-pressure line BP ₃ comprises firstly the first output S ₁ , the refrigerant / ambient air heat exchanger 17, the eighth input E ₈ , the eighth channel C ₈ provided with the sixth valve V ₆ , the fourth output S ₄ , and secondly the second output S ₂ , the refrigerant / heat transfer liquid heat exchanger 14, the ninth input E ₉ , the third expansion element D ₃ and the fourth output S ₄ , and the accumulator 16 and the low pressure channel 21 of the internal heat exchanger 19 to reach the compressor 15.

The first expansion member D ₁ , the second expansion member D ₂ and the third expansion member D ₃ are integral parts of the distribution block according to the invention and are installed inside the latter.

The first valve V'1, the first valve V1, the second valve V'2, the second valve V2, the third valve V3, the fourth valve V4, the fifth valve V5, the sixth valve V6, the third valve V'3 and the seventh valve V7 are integral parts of the distribution block according to the invention and are installed inside the latter.

Claims (18)

Distribution block (22) adapted to manage the circulation of a refrigerant fluid FR inside an air conditioning loop (4), the distribution block (22) comprising a plurality of inputs E ₁ , E ₂ , E ₃ , E ₄ , E ₅ , E ₆ , E ₇ , E ₈ , E ₉ of refrigerant FR within the distribution block (22) and a plurality of outputs S ₁ , S ₂ , S ₃ , S ₄ of refrigerant FR out of the distribution block (22), characterized in that each output S ₁ , S ₂ , S ₃ , S ₄ is in fluid relation with at least two inputs E ₁ , E ₂ , E ₃ , E ₄ , E ₅ , E ₆ , E ₇ , E ₈ , E ₉ . Distribution block (22) according to claim 1, characterized in that a first output S ₁ is in fluid connection with a first input E ₁ and a second input E ₂ . Distribution block (22) according to claim 2, characterized in that the first outlet S ₁ is in fluid connection with the first inlet E ₁ via a first channel C ₁ which is provided with a first D ₁ relaxation, in that the first channel C ₁ is equipped with a first valve V ' ₁ and in that the first output S ₁ is in fluid relation with the second input E ₂ via a second channel C ₂ which is provided with a first valve V ₁ . Distribution block (22) according to claim 3, characterized in that the first output S ₁ , the first input E ₁ , the second input E ₂ , the first channel C ₁ , the second channel C ₂ , the first valve V ₁ the first valve V ' ₁ and the first expansion element D ₁ constitute a first subset SE ₁ . Distribution block (22) according to any one of the preceding claims, characterized in that a second output S ₂ is in fluid connection with a third input E ₃ and a fourth input E ₄ . Distribution block (22) according to claim 5, characterized in that the second output S ₂ is in fluid connection with the third input E ₃ via a third channel C ₃ which is provided with a second D ₂ relaxation, in that the second expansion member D ₂ is an electronically controlled expansion device, in that the third channel C ₃ is equipped with a second valve V ' ₂ , and in that the second output S ₂ is in fluid relation with the fourth input E ₄ via a fourth channel C ₄ which is provided with a second valve V ₂ . Distribution block (22) according to claim 6, characterized in that the second output S ₂ , the third input E ₃ , the fourth input E ₄ , the third channel C ₃ , the fourth channel C ₄ , the second valve V ' ₂ , the second valve V ₂ and the second expansion member D ₂ constitute a second subset SE ₂ . Distribution block (22) according to any one of the preceding claims, characterized in that a third output S ₃ is in fluid connection with a fifth input E ₅ , a sixth input E ₆ and a seventh input E ₇ . Distribution block (22) according to claim 8, characterized in that the third output S ₃ is in fluid connection with the fifth input E ₅ via a fifth channel C ₅ which is provided with a third valve V ₃ , in that the third output S ₃ is in fluid connection with the sixth input E ₆ via a sixth channel C ₆ which is provided with a fourth valve V ₄ , and in that the third output S ₃ is in fluid connection with the seventh inlet E ₇ via a seventh channel C ₇ which is provided with a fifth valve V ₅ . Distribution block (22) according to claim 9, characterized in that the third output S ₃ , the fifth input E ₅ , the sixth input E ₆ , the seventh input E ₇ , the fifth channel C ₅ , the sixth channel C ₆ , the seventh channel C ₇ , the third valve V ₃ , the fourth valve V ₄ and the fifth valve V ₅ constitute a third subset SE ₃ . Distribution block (22) according to one of the preceding claims, characterized in that a fourth output S ₄ is in fluid connection with an eighth input E ₈ and a ninth input E ₉ . Distribution block (22) according to claim 11, characterized in that the fourth output S ₄ is in fluid connection with the eighth input E ₈ via an eighth channel C ₈ which is provided with a sixth valve V ₆ , in that the fourth output S ₄ is in fluid connection with the ninth input E ₉ via a ninth channel C ₉ which is provided with a third expansion element D ₃ , in that the ninth channel C ₉ is equipped with a third valve V ' ₃ , and in that a seventh valve V ₇ is arranged in parallel with the third expansion member D ₃ and the third valve V' ₃ . Distribution block (22) according to claim 12, characterized in that the fourth output S ₄ , the eighth input E ₈ , the ninth input E ₉ , the eighth channel C ₈ , the ninth channel C ₉ , the sixth valve V ₆ , the seventh valve V ₇ , the third valve V ' ₃ and the third expansion member D ₃ constitute a fourth subset SE ₄ . Air conditioning loop (4) comprising a distribution block (22) according to any one of claims 1 to 13, a refrigerant / heat transfer fluid heat exchanger (13), a refrigerant / heat transfer fluid heat exchanger (14) , a refrigerant / ambient air heat exchanger (17), an internal heat exchanger (19), a compressor (15) and an accumulator (16). An air conditioning loop (4) according to claim 14, characterized in that the refrigerant / ambient air heat exchanger (17) has a refrigerant discharge port (23) FR which is in fluid connection with the seventh inlet E ₇ and the eighth entry E ₈ An air-conditioning loop (4) according to claim 14 or 15, characterized in that the refrigerant / coolant heat exchanger (14) has an outlet (25) for refrigerant FR which is in fluid connection with the sixth input E ₆ and the ninth input E ₉ . Air conditioning loop (4) according to one of Claims 14 to 16, characterized in that the internal heat exchanger (19) has a high-pressure outlet (27) which is in fluid connection with the first inlet E ₁ and the third entry E ₃ . Air conditioning loop (4) according to claims 15, 16 and 17, characterized in that the air-conditioning loop (4) comprises at least one of five three-way valves (33, 34, 35, 36, 37). whose : a first three-way valve (33) interposed between the refrigerant / heat transfer fluid heat exchanger (13), the fifth input E ₅ , the fourth input E ₄ and the second input E ₂ , a second three-way valve (34) which is interposed between the first three-way valve (33), the fourth input E ₄ and the second input E ₂ , a third three-way valve (35) which is interposed between the refrigerant discharge orifice (23) FR out of the refrigerant / ambient air heat exchanger (17), the seventh input E ₇ and the eighth entry E ₈ , a fourth three-way valve (36) which is interposed between the outlet orifice (25) of coolant FR out of the fluid heat exchanger coolant / coolant (14), the sixth input E ₆ and the ninth input E ₉ , - A fifth three-way valve (37) which is interposed between the high pressure outlet (27) of refrigerant FR outside the internal heat exchanger (19), the first inlet E ₁ and the third inlet E ₃ .

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