Refrigerant distribution module

Abstract

The invention relates to a coolant distribution module (50) comprising:-a first channel (11) connecting a first inlet (E1) and a first outlet (S1),-a second channel (12) connecting a second inlet (E2) and a second outlet (S2),-a third channel (13) connecting a first connection region (C1) arranged on the first channel (11) and a third outlet (S3), -a fourth channel (14) connecting the third inlet (E3) and the second connection area (C2) arranged on the second channel (12),-a fifth channel (15) connecting the fourth inlet (E4) and the third connection area (C3) arranged on the second channel (12), and-a sixth channel (16) connecting the fourth connection area (C4) arranged on the fifth channel (15) and the fifth connection area (C5) arranged on the first channel (11), the sixth channel (16) comprises a one-way valve (4), wherein each channel (11, 12, 13, 14, 15, 16) is formed by an inner recess of the same base block (20).

Description

Technical Field

[0001] The present invention relates to the field of thermal regulation systems. Such thermal regulation systems can in particular be installed on motor vehicles. In the case of electric vehicles, these systems allow the thermal regulation of various vehicle components, such as the vehicle interior or the electrical energy storage battery. Heat exchange is mainly managed by the compression and expansion of a refrigerant within a plurality of heat exchangers, which form part of a closed circulation circuit. Background Art

[0002] Thermal regulation systems generally include a large number of heat exchangers and actuators for managing the flow rate and pressure of the refrigerant flowing through the various heat exchangers.

[0003] Thus, a large number of components such as shut-off valves, expansion devices, and various heat exchangers must be interconnected by a set of pipes through which the refrigerant flows. Therefore, it is often necessary to assemble a large number of refrigerant circulation pipes. Since the space available for accommodating these various components is limited, integrating all the components can be problematic. In addition, the assembly of the various components and elements can be tricky due to the difficulty of accessing them with tools, and checking the consistency of the produced assembly can take a long time. Moreover, when it is necessary to create a winding path for the pipes through which the refrigerant flows, this is often detrimental to the thermodynamic performance.

[0004] At least for these reasons, there is a desire for a thermal regulation system that is easier to integrate into a limited space and has a lower manufacturing cost. Summary of the Invention

[0005] To this end, the present invention proposes a refrigerant distribution module, comprising:

[0006] - a first refrigerant circulation passage connecting a first refrigerant inlet and a first refrigerant outlet,

[0007] - a second circulation passage connecting a second inlet and a second outlet,

[0008] - a third circulation passage connecting a first connection zone arranged on the first passage and a third outlet,

[0009] - a fourth circulation passage connecting a third inlet and a second connection zone arranged on the second passage, the second connection zone being arranged between the second inlet and the second outlet,

[0010] - a fifth circulation passage connecting a fourth inlet and a third connection zone arranged on the second passage, the third connection zone being arranged between the second connection zone and the second outlet,

[0011] - A sixth flow passage that connects a fourth connection area disposed on a fifth passage and a fifth connection area disposed on a first passage, the fifth connection area being disposed between a first inlet and a first connection area.

[0012] The sixth passage includes a check valve configured to allow refrigerant to flow from the fourth connection area to the fifth connection area and configured to prevent refrigerant from flowing from the fifth connection area to the fourth connection area.

[0013] Wherein each refrigerant flow passage is formed by an internal recess of the same base block.

[0014] The refrigerant flow passages are thus integrated into the structure of the refrigerant distribution module. The module does not have any protruding pipes or hoses. All the passages capable of distributing refrigerant (in other words, supplying refrigerant to multiple heat exchangers and collecting the refrigerant leaving these heat exchangers) can thus be manufactured by a single component. This promotes the integration of various elements and reduces complexity.

[0015] The features listed in the following paragraphs can be implemented independently of each other or in any technically possible combination:

[0016] The refrigerant distribution module can supply a thermal regulation system, such as a thermal regulation system for a motor vehicle.

[0017] According to one embodiment, the refrigerant distribution module includes a seventh flow passage connecting a fourth outlet and a sixth connection area disposed on the first passage, the sixth connection area being disposed between the fifth connection area and the first inlet.

[0018] This allows refrigerant to be supplied to an additional heat exchanger, which increases the possible functions of the refrigerant distribution module.

[0019] The fluid flow passage has a circular cross-section.

[0020] Thus, the passage can be simply manufactured by machining, such as drilling.

[0021] According to one aspect of the refrigerant distribution module, the first passage includes a first expansion valve disposed between the first connection area and the first outlet.

[0022] The refrigerant distribution module can thus supply a first heat exchanger operating as an evaporator.

[0023] According to one aspect of the refrigerant distribution module, the third passage includes a second expansion valve.

[0024] The refrigerant distribution module can thus also supply a second exchanger operating as an evaporator.

[0025] The first expansion valve may be an electronic expansion valve. Similarly, the second expansion valve may be an electronic expansion valve.

[0026] According to one aspect of the refrigerant distribution module, the first passage includes a first shut-off valve disposed between the first inlet and the fifth connection area.

[0027] The first shut-off valve is an electrically operated valve.

[0028] The second shut-off valve is an electrically operated valve.

[0029] According to an embodiment in which the module includes a fourth outlet, the first shut-off valve is disposed between the fifth connection area and the sixth connection area.

[0030] The fifth passage includes a second shut-off valve disposed between the fourth connection area and the third connection area.

[0031] The two shut-off valves enable the interruption of the refrigerant flow, thus allowing different operating modes.

[0032] The check valve is a passive valve.

[0033] The check valve is, for example, a non-return valve.

[0034] According to an example of an embodiment of the refrigerant distribution module, the base block has a substantially cuboid shape.

[0035] This shape facilitates the integration of various components, such as expansion valves and shut-off valves, while optimizing compactness.

[0036] The base block may be made of aluminum.

[0037] The base block can thus have a moderate weight and a low manufacturing cost.

[0038] According to one aspect of the refrigerant distribution module, the refrigerant flow passages are formed by a series of straight cylindrical portions that are in fluid communication with each other.

[0039] Therefore, the flow passages can be simply obtained by machining, such as drilling. This reduces the manufacturing cost of the refrigerant distribution module.

[0040] According to an example of an embodiment of the refrigerant distribution module, each refrigerant flow passage is formed by a series of coaxial cylindrical portions or cylindrical portions extending along intersecting axes.

[0041] For example, each refrigerant flow passage is formed by a series of coaxial cylindrical portions or cylindrical portions extending along a vertical axis.

[0042] The first passage of the base block includes a first receiving portion for receiving the first expansion valve.

[0043] The first receiving portion is cylindrical and extends along an axis.

[0044] The first passage leads to the first receiving portion, and the axis of the first receiving portion does not coincide with the axis of the first passage.

[0045] The first expansion valve includes a radial refrigerant inlet and an axial refrigerant outlet.

[0046] The second expansion valve includes a radial refrigerant inlet and an axial refrigerant outlet.

[0047] The first expansion valve and the second expansion valve can be the same.

[0048] The first shut-off valve includes a radial refrigerant inlet and an axial refrigerant outlet.

[0049] The second shut-off valve includes a radial refrigerant inlet and an axial refrigerant outlet.

[0050] The first shut-off valve and the second shut-off valve can be the same.

[0051] The third passage of the base block includes a second receiving portion for receiving the second expansion valve.

[0052] The first passage of the base block includes a third receiving portion for receiving the first shut-off valve.

[0053] The fifth passage of the base block includes a fourth receiving portion for receiving the second shut-off valve.

[0054] According to an example of an embodiment of the refrigerant distribution module, the second inlet and the second outlet are arranged on the first face of the base block.

[0055] The first face is flat.

[0056] According to an example of an embodiment of the refrigerant distribution module, the third inlet and the third outlet are arranged on the second face of the base block.

[0057] The second face is flat.

[0058] According to an example of an embodiment of the refrigerant distribution module, the first outlet is arranged on the third face of the base block.

[0059] The first face, the second face and the third face are pairwise perpendicular.

[0060] The receiving portion for receiving the first expansion valve and the receiving portion for receiving the second expansion valve open on the same face of the base block.

[0061] The expansion valves are thus grouped together.

[0062] For example, the receiving portion for receiving the first expansion valve and the receiving portion for receiving the second expansion valve lead to the first face of the base block.

[0063] Multiple components are received on the same side of the base block, which facilitates assembly.

[0064] According to an example of an embodiment, the first inlet and the fourth outlet are arranged on the first side of the base block.

[0065] According to an embodiment of the refrigerant distribution module, the second channel includes a refrigerant pressure sensor arranged between the second connection area and the third connection area.

[0066] The second channel may also include a refrigerant temperature sensor arranged between the third connection area and the second outlet.

[0067] These two sensors provide information about the thermodynamic state of the refrigerant, allowing the adjustment of the thermal regulation system of the integrated refrigerant distribution module.

[0068] According to an example of an embodiment of the refrigerant distribution module, the refrigerant pressure sensor and the refrigerant temperature sensor are arranged on the fourth side of the base block opposite to the third side.

[0069] According to an embodiment, the refrigerant distribution module includes an interface flange that interfaces with a first heat exchanger. The interface flange includes:

[0070] - A first transfer channel that connects the third outlet of the module to the refrigerant inlet of the first heat exchanger,

[0071] - A second transfer channel that connects the outlet of the first heat exchanger and the third inlet of the module,

[0072] The interface flange is rigidly fixed to the base block and the first heat exchanger.

[0073] The interface flange enables the adjustment of the relative position between the first heat exchanger and the refrigerant distribution module.

[0074] The interface flange includes a flat portion and two nozzles for connection to the base block, and the nozzles extend transversely to the flat portion.

[0075] According to an example of an embodiment, the first transfer channel includes a straight groove that extends along an axis parallel to the plane of extension of the flat portion.

[0076] The second transfer channel is perpendicular to the plane of extension of the flat portion.

[0077] The interface flange has an overall shape of a right triangle.

[0078] According to an example of an embodiment, the straight groove of the first transfer channel is parallel to the hypotenuse of the right triangle.

[0079] The interface flange is supported on one side of the base block.

[0080] The interface flange can be brazed to the first heat exchanger.

[0081] The interface flange includes a nozzle for connection to the third outlet and a nozzle for connection to the third inlet.

[0082] According to one embodiment, the first heat exchanger is configured to allow heat exchange between the refrigerant and the heat transfer liquid.

[0083] The first exchanger is, for example, a plate exchanger.

[0084] The first heat exchanger includes a heat transfer liquid inlet nozzle and a heat transfer liquid outlet nozzle that extend in a parallel direction.

[0085] The first heat exchanger has an overall cuboid shape.

[0086] The refrigerant inlet nozzle, the refrigerant outlet nozzle, the heat transfer liquid inlet nozzle, and the heat transfer liquid outlet nozzle are arranged to project from the same face of the first heat exchanger.

[0087] Each of the four nozzles is arranged near a corner of the same face of the first heat exchanger.

[0088] According to an example of the embodiment, the refrigerant distribution module includes a first heat exchanger arranged in an extension of the base block of the refrigerant distribution module.

[0089] The refrigerant distribution module can thus integrate the heat exchanger in a compact manner.

[0090] According to one embodiment, the refrigerant distribution module includes a filter that is partially arranged in the first channel, between the fifth connection zone and the first connection zone, and is partially arranged in the third channel, between the first connection zone and the housing for receiving the second expansion valve.

[0091] Thus, the filter is inside the base block and does not modify its body.

[0092] According to one embodiment, the refrigerant distribution module includes a refrigerant filling valve. The filling valve is arranged in the fifth housing of the base block, and the fifth housing is in fluid communication with the first channel.

[0093] The fifth housing is cylindrical.

[0094] The fifth connection zone leads to the fifth housing.

[0095] The fifth housing and the filter are coaxial.

[0096] Thus, machining along the same axis enables the formation of the housing for the filling valve and the channel portion for receiving the filter to be formed together.

[0097] The first part of the first channel extends between the first inlet and the housing for receiving the first shut-off valve.

[0098] The second part of the first channel extends between the receiving portion for the first shut-off valve and the fifth connection area.

[0099] The sixth channel is straight.

[0100] The second part of the first channel is coaxial with the sixth channel.

[0101] Therefore, machining along the same axis enables the second part of the first channel and the sixth channel to be formed jointly.

[0102] The third part of the first channel extends between the fifth connection area and the receiving portion for the first expansion valve.

[0103] The fourth part of the first channel extends between the first connection area and the receiving portion for the first expansion valve.

[0104] The fifth part of the first channel extends between the receiving portion for the first expansion valve and the first outlet.

[0105] The first part of the second channel extends between the second inlet and the second connection area.

[0106] The second part of the second channel extends between the second connection area and the third connection area.

[0107] The third part of the second channel extends between the third connection area and the second outlet.

[0108] The first part of the third channel extends between the first connection area and the receiving portion for the second shut-off valve.

[0109] The second part of the third channel extends between the receiving portion for the second expansion valve and the third outlet.

[0110] The second part of the third channel includes two sections extending along a vertical axis.

[0111] The fourth channel is straight.

[0112] The fourth channel and the second part of the second channel are coaxial.

[0113] The first part of the fifth channel extends between the fourth inlet and the receiving portion for the second shut-off valve.

[0114] The second part of the fifth channel extends between the receiving portion for the second shut-off valve and the third connection area.

[0115] According to one aspect of the refrigerant distribution module, the fourth channel, the second part of the second channel, and the receiving portion for the second shut-off valve are coaxial.

[0116] Thus, machining along the same axis enables the fourth passage, the second part of the second passage, and the housing for receiving the second shut-off valve to be formed together.

[0117] The sixth passage is straight.

[0118] The fourth connection area leads to the housing for receiving the second shut-off valve.

[0119] The present disclosure also relates to a thermal regulation system for a motor vehicle, comprising:

[0120] - A first heat exchanger configured to operate as an evaporator,

[0121] - A second heat exchanger configured to operate as an evaporator,

[0122] - A refrigerant distribution module as described above, wherein:

[0123] The inlet of the first exchanger is connected to the third outlet,

[0124] The outlet of the first exchanger is connected to the third inlet,

[0125] The inlet of the second exchanger is connected to the first outlet,

[0126] The outlet of the second exchanger is connected to the second inlet,

[0127] - A first refrigerant flow branch, which successively includes along the refrigerant flow direction:

[0128] -- A compressor including at least one inlet and one outlet,

[0129] -- A condenser,

[0130] -- A third expansion device,

[0131] -- A third heat exchanger configured to selectively operate as an evaporator or a condenser,

[0132] The outlet of the third exchanger is connected to the fourth inlet of the distribution module, and the inlet of the compressor is connected to the second outlet,

[0133] - A second refrigerant flow branch connecting the junction point arranged on the first flow branch to the first inlet of the distribution module.

[0134] According to an embodiment of the thermal regulation system:

[0135] - The first exchanger is configured to be thermally coupled to an element of the electric powertrain of the motor vehicle,

[0136] - The second heat exchanger is configured to exchange heat with the internal air flow inside the vehicle,

[0137] - The third heat exchanger is configured to exchange heat with the internal air flow inside the vehicle.

[0138] The refrigerant module is thus integrated into a thermal regulation system that can operate in an interior cooling mode, a heat pump mode, or an interior dehumidification mode of the vehicle while ensuring thermal regulation of the components of the vehicle powertrain. Most of the necessary components are integrated into the module, allowing for a compact integration of the thermal regulation system.

[0139] The components of the electric powertrain can include an electrical energy storage battery.

[0140] The components of the electric powertrain can include an electronic module for controlling the electric drive motor of the vehicle.

[0141] The first refrigerant flow branch includes a refrigerant accumulation device arranged between the condenser and the junction point. BRIEF DESCRIPTION OF THE DRAWINGS

[0142] Further features, details, and advantages will become apparent by reading the following detailed description and studying the drawings, in which:

[0143] Figure 1 is a schematic view of a thermal regulation system of an integrated distribution module according to a first embodiment,

[0144] Figure 2 is a schematic view of a thermal regulation system of an integrated distribution module according to a second embodiment,

[0145] Figure 3 is Figure 1 a perspective schematic view of the refrigerant distribution module schematically shown in

[0146] Figure 4 is Figure 1 a detailed perspective view of a base block forming part of the refrigerant distribution module of

[0147] Figure 5 is Figure 4 another detailed perspective view of the base block of

[0148] Figure 6 is Figure 1 a perspective view of the refrigerant distribution module schematically shown in

[0149] Figure 7 is Figure 6 another perspective view of the refrigerant distribution module of

[0150] Figure 8 is Figure 4 another detailed perspective view of the base block of

[0151] Figure 9 isFigure 4 Another detailed perspective view of the base block

[0152] Figure 10 is Figure 6 and 7 An exploded perspective view of a part of the refrigerant distribution module

[0153] Figure 11 is Figure 6 and 7 Another exploded perspective view of a part of the refrigerant distribution module

[0154] Figure 12 Shows Figure 6 and 7 Another view of certain components of the refrigerant distribution module Detailed Description

[0155] For easier reading of the drawings, the various elements are not necessarily shown to scale. In these figures, the same elements have the same reference numerals. Certain elements or parameters may be indexed, that is, designated as, for example, a first element or a second element, or in fact a first parameter and a second parameter, etc. The purpose of this indexing is to distinguish similar but different elements or parameters. This indexing does not imply that one element or parameter is prior to another, and the names may be interchanged

[0156] The statement "the second element is placed between the first element and the third element" means that the shortest path from the first element to the third element passes through the second element

[0157] When it is specified that a subsystem has a given element, this does not exclude the presence of other elements in the subsystem

[0158] The thermal regulation system 100 to be described can be installed on a motor vehicle. The compression device 7 enables the refrigerant to circulate in a closed refrigerant circulation circuit 10. The compression device 7 can be an electric compressor, that is, a compressor whose movable parts are driven by an electric motor. The compression device 7 includes a side for sucking in low-pressure refrigerant, also called the inlet 7a of the compression device, and a side for delivering high-pressure refrigerant, also called the outlet 7b of the compression device. The internal moving parts of the compressor 7 bring the refrigerant from the low pressure on the inlet 7a side to the high pressure on the outlet 7b side. After expanding in one or more expansion devices, the refrigerant returns to the inlet 7a of the compressor 7 and starts a new thermodynamic cycle

[0159] The electronic control unit 60 receives information from various sensors that mainly measure the characteristics of the refrigerant. The electronic control unit 60 also receives instructions issued by the vehicle passengers, such as the desired temperature inside the vehicle. The electronic control unit 60 implements control laws so that various actuators can be controlled to control the thermal regulation system 100 to execute the received instructions.

[0160] The refrigerant circulation circuit 10 has a plurality of branches connected to each other. Each junction allows the refrigerant to enter one or the other circuit section meeting at that junction. By adjusting the opening or closing of the shut-off valves, check valves or expansion devices included in each branch, the refrigerant is distributed between the circuit sections converging at the junction. In other words, each junction is a device for changing the direction of the refrigerant arriving at that junction. Thus, the shut-off valves and check valves make it possible to selectively introduce the refrigerant into the various branches of the refrigerant circuit in order to provide different operating modes, which will be described below.

[0161] The refrigerant used in the refrigerant circuit 10 is a chemical fluid in this case, such as R1234yf. Other refrigerants can also be used, such as R134a, R290 or R744.

[0162] In the respective figures, the X-axis corresponds to the longitudinal axis of the module 50, the Y-axis corresponds to the transverse axis of the module 50, and the Z-axis corresponds to a third axis perpendicular to the other two axes. When the distribution module 50 is in its nominal mounting position in the vehicle, the longitudinal axis X can coincide with the longitudinal axis of the vehicle. Similarly, the transverse axis Y can correspond to the transverse axis of the vehicle. The Z-axis can correspond to the vertical axis. However, another orientation of the module 50 is also possible.

[0163] In the meaning of the present application, the terms "channel" and "refrigerant circulation channel" are equivalent. Each channel has only one inlet and one outlet. In other words, the channel has no branches. The circuit sections arranged in parallel are formed by at least two separate channels. Each inlet of the module is a refrigerant inlet and each outlet is a refrigerant outlet.

[0164] Each connection zone establishes fluid communication between two channels. The connection zone is defined by the intersection between two channels. It is called a connection zone rather than a connection point because the fluid circulation channel is a volume element. Each connection zone forms a diverting device from one channel to another.

[0165] Figure 6 The refrigerant distribution module 50 is shown, which can be integrated into the thermal regulation system 100 of a motor vehicle.

[0166] A schematic diagram of such a thermal regulation system 100 integrating the distribution module 50 is as Figure 1 shown.

[0167] The refrigerant distribution module 50 includes:

[0168] - A first refrigerant flow passage 11 connecting the first refrigerant inlet E1 and the first refrigerant outlet S1,

[0169] - A second flow passage 12 connecting the second inlet E2 and the second outlet S2,

[0170] - A third flow passage 13 connecting the first connection area C1 arranged on the first passage 11 and the third outlet S3,

[0171] - A fourth flow passage 14 connecting the third inlet E3 and the second connection area C2 arranged on the second passage 12, the second connection area C2 being between the second inlet E2 and the second outlet S2,

[0172] - A fifth flow passage 15 connecting the fourth inlet E4 and the third connection area C3 arranged on the second passage 12, the third connection area C3 being between the second connection area C2 and the second outlet S2,

[0173] - A sixth flow passage 16 connecting the fourth connection area C4 arranged on the fifth passage 15 and the fifth connection area C5 arranged on the first passage 11, the fifth connection area C5 being between the first inlet E1 and the first connection area C1.

[0174] The sixth passage 16 includes a check valve 4 configured to allow refrigerant to flow from the fourth connection area C4 to the fifth connection area C5 and configured to prevent refrigerant from flowing from the fifth connection area C5 to the fourth connection area C4.

[0175] Each refrigerant flow passage 11, 12, 13, 14, 15, 16 is formed by an internal recess of the same base block 20.

[0176] The refrigerant flow passages 11, 12, 13, 14, 15, 16 are thus integrated into the structure of the refrigerant distribution module 50. The module 50 has no protruding pipes or hoses. All the passages capable of distributing refrigerant, in other words the passages that supply refrigerant to multiple heat exchangers and collect the refrigerant leaving these heat exchangers, can thus be manufactured by a single component. Since the module can be a compact component, it facilitates the integration of various elements. The integration complexity is also reduced because standard components can be used for different applications.

[0177] In Figure 1 the dashed lines delimit a part of the schematic diagram that forms part of the base block 20 of the distribution module 50 according to the first embodiment.

[0178] The refrigerant distribution module 50 can supply a thermal regulation system, such as a thermal regulation system for a motor vehicle.

[0179] Figure 2 Schematically shows a thermal regulation system 100 including a distribution module 50 according to the second embodiment. The schematic diagram of the thermal regulation system 100 is relative to Figure 1 unchanged, but the refrigerant distribution module 50 integrates an additional part of the refrigerant circuit 10. As previously mentioned, the dashed line represents a part of the schematic diagram included in the base block 20.

[0180] According to this second embodiment, the refrigerant distribution module 50 includes a seventh flow channel 17 connecting the fourth outlet S4 and the sixth connection area C6 arranged on the first channel 11. The sixth connection area C6 is between the fifth connection area C5 and the first inlet E1.

[0181] The difference between this second embodiment and the first embodiment lies in the presence of an additional outlet S4. This enables the supply of refrigerant to an additional heat exchanger, which increases the possible functions of the refrigerant distribution module.

[0182] In this case, the fluid flow channel has a circular cross-section. Therefore, the channel can be simply manufactured by machining, such as drilling holes in the base block 20.

[0183] The diameter of the refrigerant flow channel is between 8 mm and 30 mm.

[0184] The first channel 11 includes a first expansion valve 31 arranged between the first connection area C1 and the first outlet S1.

[0185] The refrigerant distribution module 50 can thus supply low-pressure refrigerant to the heat exchanger. The heat exchanger 2 can thus operate as an evaporator.

[0186] The third channel 13 includes a second expansion valve 32. The second expansion valve 32 is arranged between the first connection area C1 and the third outlet S3.

[0187] The refrigerant distribution module 50 can thus also supply low-pressure refrigerant to another heat exchanger operating as an evaporator.

[0188] The first expansion valve 31 can be an electronic expansion valve. Similarly, the second expansion valve 32 can be an electronic expansion valve.

[0189] In an electronic expansion valve, the channel portion allowing the passage of refrigerant can be continuously adjusted between a closed position and a maximum open position. For this purpose, the control unit 60 of the thermal regulation system 100 controls an electric motor, which moves a movable closing device that controls the channel portion available for refrigerant.

[0190] The first channel 11 includes a first shut-off valve 5 arranged between the first inlet E1 and the fifth connection area C5.

[0191] In this case, the first shut-off valve 5 is an electrically operated valve.

[0192] According to the second embodiment, in which the refrigerant distribution module 50 includes a fourth outlet S4, the first shut-off valve 5 is arranged between a fifth connection zone C5 and a sixth connection zone C6.

[0193] The fifth passage 15 includes a second shut-off valve 6 arranged between a fourth connection zone C4 and a third connection zone C3.

[0194] The second shut-off valve 6 is also an electrically operated valve.

[0195] The electronic control unit 60 can independently control the opening and closing of the first shut-off valve 5 and the second shut-off valve 6. In other words, the state of one shut-off valve does not depend on the state of the other shut-off valve. The two shut-off valves 5, 6 make it possible to interrupt the refrigerant flow, thus allowing different operating modes.

[0196] The check valve 4 is a passive valve. The check valve 4 is, for example, a non-return valve.

[0197] The check valve 4 is completely contained within the base block 20. In other words, once the base block 20 is equipped with all the components for managing the refrigerant flow and expansion, the check valve 4 is no longer visible and no longer accessible.

[0198] Figure 4 and Figure 5 The base block 20 is shown separately.

[0199] According to an example of the illustrated embodiment, the base block 20 generally has the shape of a cuboid. This shape facilitates the integration of various components, such as expansion valves and shut-off valves, while optimizing compactness.

[0200] The base block 20 has six faces. Two faces are parallel to the plane defined by the directions X and Y. Another two faces are parallel to the plane defined by the directions Y and Z. Another two faces are parallel to the plane defined by the directions X and Z. The base block may include regions protruding from the faces, allowing attachment to the vehicle.

[0201] The base block 20 may be made of aluminum. Thus, the base block 20 may have a moderate weight and a low manufacturing cost.

[0202] The base block 20 is obtained, for example, by extrusion. Thus, internal defects, such as porosity, are avoided. The refrigerant flow channels are formed by machining the base block 20. Machining of a solid block obtained by extrusion is possible. The machined surfaces are in contact with the refrigerant. Due to the absence of porosity, the sealing of the base block 20 is ensured even when the refrigerant is under high pressure.

[0203] The height of the base block 20, in other words, the dimension along the Z-axis in the figure, is between 90 mm and 130 mm.

[0204] The width of the base block 20, in other words, the dimension along the Y-axis in the figure, is between 180 mm and 240 mm.

[0205] The length of the base block, in other words, the dimension along the X-axis in the figure, is between 200 mm and 280 mm.

[0206] The refrigerant flow channels 11, 12, 13, 14, 15, 16 are formed by a series of straight cylindrical portions that are in fluid communication with each other.

[0207] Therefore, the flow channels can be simply obtained by machining, such as drilling. This reduces the manufacturing cost of the refrigerant distribution module.

[0208] In Figure 3 the figure, the thick black lines schematically indicate the drilling directions so that various channels can be created. In this figure, the changes in the channel cross-sections are not depicted, only the directions in which each channel can be produced by drilling are shown.

[0209] The line denoted as D1_1 corresponds to the first drilling direction. This drilling direction enables, in particular, the formation of part of the fifth channel 15, part of the second channel 12, and the fourth channel 14. The line D1_2 represents a second drilling direction parallel to D1_1. This drilling enables, in particular, the production of part of the first channel 11 and part of the third channel 13. The line D1_3 represents a third drilling direction parallel to D1_1 and D1_2. This drilling enables the formation of another part of the third channel 13 and the third outlet S3. Similarly, the drilling directions denoted as D2_1, D2_2, D2_3 are parallel to each other. The direction D2_1 enables the production of the fourth inlet E4 and part of the fifth channel 15. The direction D2_2 enables the production of the second outlet S2 and part of the second channel 12. The direction D2_3 enables the production of the second inlet E2 and another part of the second channel 12.

[0210] Similarly, the directions denoted as D3_1 and D3_2 are parallel and enable, in particular, the formation of other parts of the channels. In Figure 3 the figure, the different drilling directions, in particular D1_1 to D1_3, D2_1 and D2_2, D3_1 and D3_2, are shown as thick solid lines, even for parts that are not visible from the outside because they are hidden by the outer surface of the base block 20.

[0211] According to the example shown, each refrigerant flow channel 11, 12, 13, 14, 15, 16 is formed by a series of coaxial cylindrical portions or cylindrical portions extending along intersecting axes.

[0212] For example, each refrigerant flow passage is formed by a series of coaxial cylindrical portions or cylindrical portions extending along a vertical axis.

[0213] The first passage 11 of the base block 20 includes a first receiving portion 21 for receiving the first expansion valve 31. The first receiving portion 21 is cylindrical and extends along the axis A21.

[0214] The first passage 11 leads to the first receiving portion 21. The axis A21 of the first receiving portion 21 does not coincide with the axis of the first passage 11.

[0215] The first expansion valve 31 includes a radial refrigerant inlet 31a and an axial refrigerant outlet 31b.

[0216] The receiving portion 21 for the first expansion valve 31 has a cylindrical shape. The receiving portion 21 includes a first cylindrical portion extending into a second coaxial cylindrical portion, the diameter of the second coaxial cylindrical portion being smaller than that of the first portion. The receiving portion 21 includes an internal thread into which the thread 29 of the first expansion valve 31 can be engaged to fix the first expansion valve 31.

[0217] The first passage 11 includes a portion 11C upstream of the first expansion valve 31, which leads to the cylindrical periphery of the first cylindrical portion of the receiving portion 21. The first passage 11 includes a portion 11D downstream of the first expansion valve 31, which includes the second cylindrical portion of the receiving portion 21. When the first expansion valve 31 is installed in the module 50, the first seal 27 ensures the seal of the receiving portion 21 relative to the outside. The second seal 28 ensures the seal of the receiving portion 21 relative to the downstream portion 11D of the first passage 11. Thus, when the expansion valve 31 is installed in the receiving portion 21, the refrigerant can flow from the upstream portion 11C of the first passage 11 to the downstream portion 11D only by flowing through the expansion valve 31. The passage cross-section of the refrigerant through the first expansion valve 31 can vary continuously according to the position of the movable closing device. The movable closing device is operated by an electric motor driving an actuating mechanism.

[0218] The third passage 13 of the base block 20 includes a second receiving portion 22 for receiving the second expansion valve 32. The second expansion valve 32 is arranged between the first connection area C1 and the third outlet S3.

[0219] The receiving portion 22 for the second expansion valve 32 can be the same as the receiving portion 21 for the first expansion valve 31, in other words, they have the same shape and the same dimensions.

[0220] The second expansion valve 32 includes a radial refrigerant inlet 32a and an axial refrigerant outlet 32b. The second expansion valve 32 operates according to the same principle as the first expansion valve 31.

[0221] The first expansion valve 31 and the second expansion valve 32 can be the same.

[0222] Figure 12 Part A of depicts the expansion valves 31, 32 not mounted on the module 50. Figure 12 Part B of depicts the shut-off valves 5, 6 not mounted on the module 50.

[0223] The first shut-off valve 5 includes a radial refrigerant inlet 5a and an axial refrigerant outlet 5b.

[0224] The second shut-off valve 6 includes a radial refrigerant inlet 6a and an axial refrigerant outlet 6b.

[0225] The first shut-off valve 5 and the second shut-off valve 6 can be the same.

[0226] In terms of the arrangement of the refrigerant inlets and outlets, the first shut-off valve 5 and the second shut-off valve 6 operate according to the same principle as the first expansion valve 31 and the second expansion valve 32. The first shut-off valve 5 and the second shut-off valve 6 have two stable operating positions: a closed position and an open position. In the closed position, the flow rate of the refrigerant through the valve is zero. In the open position, the refrigerant can pass through the valve and the channel cross-section is constant. Zero flow rate means zero except for leakage.

[0227] In Figure 12 In part A of, the dashed arrow F1 schematically represents the refrigerant entering through the respective inlet ports of the radial inlets for the expansion valves 31, 32, and the solid arrow F2 represents the refrigerant leaving through the axial outlets.

[0228] In Figure 12 In part B of, the arrow F3 schematically represents the refrigerant entering the shut-off valves 5, 6 through the multiple ports of the radial inlets, and the arrow F4 schematically represents the refrigerant leaving through the axial outlets.

[0229] The first channel 11 of the base block 20 includes a third receiving portion 23 for receiving the first shut-off valve 5.

[0230] The receiving portion 23 for the first shut-off valve 5 includes a first cylindrical chamber 23_1 having a side wall and an annular bottom 49. The receiving portion 23 further includes a second chamber 23_2, which is also cylindrical, coaxial with the first chamber 23_1, and leads to the bottom 49 of the first chamber 23_1. The radial inlet of the first shut-off valve 5 leads to the first cylindrical chamber 23_1. The axial outlet of the first shut-off valve 5 leads to the second cylindrical chamber 23_2.

[0231] The fifth channel 15 of the base block 20 includes a fourth receiving portion 24 for receiving the second shut-off valve 6. The fourth receiving portion 24 is similar to the third receiving portion 23.

[0232] According to the illustrated example, particularly in Figure 4 the second inlet E2 and the second outlet S2 are arranged on the first face 20_1 of the base block 20. The first face 20_1 is flat.

[0233] The second inlet E2 and the second outlet S2 are arranged in this case on the flat portion 20_1A of the first face 20_1 of the base block 20. Particularly as Figure 4 shown, the first face 20_1 includes two flat portions 20_1A and 20_1B, which are offset from each other along the Z-axis perpendicular to the two flat portions. The second flat portion 20_1B can be formed by a counterbore on the first face of the base block 20. The offset between the two flat portions 20_1A and 20_1B enables the volume in the Z-direction to be reduced.

[0234] As Figure 5 shown, the third inlet E3 and the third outlet S3 are arranged on the second face 20_2 of the base block 20.

[0235] In this case, the second face 20_2 is flat.

[0236] Particularly as Figure 4 shown, the first outlet S1 is arranged on the third face 20_3 of the base block 20. In this case, the third face 20_3 is flat.

[0237] The first face 20_1, the second face 20_2 and the third face 20_3 are pairwise perpendicular.

[0238] The housing portion 21 for receiving the first expansion valve 31 and the housing portion 22 for receiving the second expansion valve 32 open on the same face of the base block 20.

[0239] The two expansion valves 31, 32 are thus combined together.

[0240] The housing portion 21 for receiving the first expansion valve 31 and the housing portion 22 for receiving the second expansion valve 32 open on the first face 20_1 of the base block 20.

[0241] The same face of the base block receives a plurality of components, which facilitates assembly.

[0242] More specifically, the housing portion 21 for receiving the first expansion valve 31 and the housing portion 22 for receiving the second expansion valve 32 open on the second flat portion 20_1B of the first face 20_1.

[0243] The first inlet E1 and the fourth outlet E4 are arranged on the first face 20_1 of the base block 20.

[0244] More specifically, the first face 20_1 includes a third flat portion 20_1C which is offset relative to the two flat portions 20_1A, 20_1B along the Z axis perpendicular to the three flat portions 20_1A, 20_1B, 20_1C.

[0245] The receiving portion 21 for receiving the first expansion valve 31 and the receiving portion 22 for receiving the second expansion valve 32 open onto the third flat portion 20_1C of the first face 20_1.

[0246] In this case, the second channel 12 includes a refrigerant pressure sensor 37 arranged between the second connection zone C2 and the third connection zone C3.

[0247] The second channel 12 further includes a refrigerant temperature sensor 38 arranged between the third connection zone C3 and the second outlet S2.

[0248] These two sensors 37, 38 provide information about the thermodynamic state of the refrigerant, allowing the thermal regulation system of the integrated refrigerant distribution module to be adjusted.

[0249] According to the example shown, in particular in Figure 6 and Figure 7 the refrigerant pressure sensor 37 and the refrigerant temperature sensor 38 are arranged on the fourth face 20_4 of the base block 20 opposite the third face 20_3.

[0250] More specifically, the pressure sensor 37 is arranged in the receiving portion 26_1 leading to the fourth face 20_4 of the base block 20. The temperature sensor 38 is arranged in the receiving portion 26_2 leading to the fourth face 20_4 of the base block 20. The sensors 37, 38 are screwed into their respective receiving portions 26_1, 26_2, and seals ensure sealing from the outside of the module 50. The active elements of each sensor are in contact with the refrigerant. The two sensors 37, 38 make it possible to know the state of the low-pressure refrigerant that will flow out of the base block via the second outlet S2.

[0251] As Figure 7 shown, only the face 20_6 of the base block 20 has no opening. This face can thus come into contact with a part of the vehicle supporting the module 50. In the various figures, the means for attaching the module 50 to the vehicle are not shown.

[0252] According to the example shown, the refrigerant distribution module 50 includes an interface flange 40 forming a butt joint with the first heat exchanger 1. The interface flange 40 includes:

[0253] - a first transfer channel 41 connecting the third outlet S3 of the module 50 to the refrigerant inlet 1a of the first heat exchanger 1,

[0254] - The second transfer channel 42 connects the outlet 1b of the first heat exchanger 1 and the third inlet E3 of the module 50.

[0255] The interface flange 40 is rigidly fixed to the base block 20 and the first heat exchanger 1.

[0256] The interface flange 40 is interposed between the first exchanger 1 and the second face 20_2 of the base block 20. The interface flange 40 enables the relative position of the first heat exchanger 1 and the refrigerant distribution module 50 to be adjusted. In other words, it enables the inlets / outlets of the first heat exchanger 1 to coincide with the corresponding inlets / outlets of the base block 20.

[0257] In Figure 10 and Figure 11 the interface flange 40 is shown in detail. The interface flange 40 includes a flat portion 43 and two nozzles 44, 45 for connection to the base block 20. The nozzles 44, 45 extend transversely to the flat portion 43.

[0258] The first transfer channel 41 includes a straight groove 46 extending along an axis parallel to the plane of extension of the flat portion 43. The second transfer channel 42 is perpendicular to the plane of extension P43 of the flat portion 43.

[0259] The interface flange 40 has an overall shape of a right triangle. The straight groove 46 of the first transfer channel 41 is parallel to the hypotenuse of the right triangle.

[0260] The interface flange 40 bears on one face of the base block 20. When the module 50 is assembled, the interface flange 40 bears on the second face 20_2 of the base block 20.

[0261] The interface flange 40 includes a nozzle 44 for connection to the third outlet S3 and a nozzle 45 for connection to the third inlet E3. When the module 50 is assembled, the nozzle 44 is inserted into the third outlet S3 and the nozzle 45 is inserted into the third inlet E3. Each nozzle 44, 45 includes two cylindrical grooves. Two O - rings (not shown in the figure) are respectively arranged in the grooves of the nozzles to ensure sealing with the base block 20.

[0262] The interface flange 40 can be brazed to the first heat exchanger 1. In this case, the interface flange 40 and the first exchanger 1 form a non - detachable assembly. The first exchanger 1 and the base block 20 are assembled simply by inserting the two nozzles 44, 45 into the base block 20. In other words, as Figure 6 and 7 shown, the refrigerant distribution module 50 integrates the interface flange 40 and the first exchanger 1. It also integrates two expansion valves 31, 32, two shut - off valves 5, 6 and two pressure and temperature sensors 37, 38.

[0263] According to the example shown, the first heat exchanger 1 is configured to allow heat exchange between the refrigerant and the heat transfer liquid. The markings 1a, 1b correspond to the refrigerant inlet / outlet, and the markings 1c, 1d correspond to the heat transfer liquid inlet / outlet. The heat transfer liquid is, for example, a mixture of water and ethylene glycol.

[0264] The first exchanger 1 is, for example, a plate exchanger.

[0265] The first heat exchanger 1 has an overall cuboid shape.

[0266] The first heat exchanger 1 includes a heat transfer liquid inlet nozzle 47 and a heat transfer liquid outlet nozzle 48 that extend in a parallel direction.

[0267] The refrigerant inlet nozzle 45, the refrigerant outlet nozzle 44, the heat transfer liquid inlet nozzle 47, and the heat transfer liquid outlet nozzle 48 are arranged to protrude from the same face of the first heat exchanger 1. Each of the four nozzles 44, 45, 46, 47 is arranged near a corner of the same face of the first heat exchanger 1.

[0268] The first heat exchanger 1 is arranged in an extension of the base block 20 of the refrigerant distribution module 50.

[0269] The refrigerant distribution module 50 can thus integrate the heat exchanger in a particularly compact manner. The interface flange 40 allows this compact arrangement without compromising the thermodynamic performance of the first exchanger 1. This is because the second channel 42 is completely straight, which means that the pressure loss between the outlet 1b of the first heat exchanger 1 and the third inlet E3 of the base block can be neglected.

[0270] The refrigerant distribution module 50 also includes a filter 30. The filter 30 is partially arranged in the first channel 11, between the fifth connection zone C5 and the first connection zone C1. The filter 30 is also partially arranged in the third channel 13, between the first connection zone C1 and the receiving portion 22 for the second expansion valve 32.

[0271] Therefore, the filter 30 is inside the base block 20 and does not change its volume. Figure 9 The arrangement of the filter 30 is shown in detail. The installation of the filter 30 does not require any specific machining because the filter is simply inserted into the already formed channels. In Figure 1 the schematic diagram, for the sake of simplicity of description, the filter 30 is shown in two separate parts. In Figure 9 the example, the filter 30 is integral.

[0272] The filter 30 includes a cylindrical support structure, on which a filter mesh is arranged to form a cylindrical chamber. The refrigerant is sucked into the cylindrical chamber and filtered out through the side surface formed by the filter mesh. The filtered refrigerant reaches the inlets of the first expansion valve 31 and the second expansion valve 32.

[0273] The refrigerant distribution module 50 includes a refrigerant filling valve 35. The filling valve 35 is arranged in the fifth accommodating portion 25 of the base block 20, and the fifth accommodating portion 25 is in fluid communication with the first channel 11.

[0274] The fifth accommodating portion 25 is cylindrical.

[0275] The fifth connection area C5 leads to the fifth accommodating portion 25.

[0276] The fifth accommodating portion 25 and the filter 30 are coaxial.

[0277] Therefore, machining along the same axis enables the common formation of the accommodating portion 25 for the filling valve 35 and the channel portion for receiving the filter 30. During the assembly of the module 50, the filter 30 is inserted and placed in position, and then the filling valve 35 is inserted into its accommodating portion 25.

[0278] Figure 12 Part C of shows the filling valve 35 in detail. The filling valve 35 includes a filling element 34 and a tubular portion 36. The filling element 34 is outside the base block 20. The tubular portion 36 is inserted into the base block 20. The tubular portion 36 includes an axial outlet 36B and a recess 36C, allowing radial communication with the fifth connection area C5. In the recess 36C, the refrigerant flow F5 flowing in the sixth channel 16 and coming from the one-way valve 4 converges with the refrigerant flow F6 flowing in the portion 11B of the first channel 11, and the two mixed flows represented as F7 leave through the axial outlet 36 along the direction of the filter 30.

[0279] The arrangement of each part of the refrigerant flow channel, including the connection areas between the channels, will be described in detail below.

[0280] The first part 11A of the first channel 11 extends between the first inlet E1 and the accommodating portion 23 for receiving the first stop valve 5.

[0281] The second part 11B of the first channel 11 extends between the accommodating portion 23 for receiving the first stop valve 5 and the fifth connection area C5.

[0282] The sixth channel 16 is straight.

[0283] The second part 11B of the first channel 11 is coaxial with the sixth channel 16.

[0284] Thus, machining along the same axis enables the second part 11B of the first channel 11 and the sixth channel 16 to be formed together.

[0285] The third part 11C of the first channel 11 extends between the fifth connection area C5 and the accommodating part 21 for receiving the first expansion valve 31.

[0286] The fourth part 11D of the first channel 11 extends between the first connection area C1 and the accommodating part 21 for receiving the first expansion valve 31.

[0287] The fifth part 11E of the first channel 11 extends between the accommodating part 21 for receiving the first expansion valve 31 and the first outlet S1.

[0288] The first part 12A of the second channel 12 extends between the second inlet E2 and the second connection area C2.

[0289] The second part 12B of the second channel 12 extends between the second connection area C2 and the third connection area C3.

[0290] The third part 12C of the second channel 12 extends between the third connection area C3 and the second outlet S2.

[0291] The first part 13A of the third channel 13 extends between the first connection area C1 and the accommodating part 24 for receiving the second shut-off valve 6.

[0292] The second part 13B of the third channel 13 extends between the accommodating part 22 for the second expansion valve 32 and the third outlet S3.

[0293] The second part 13B of the third channel 13 includes two sections extending along the vertical axis.

[0294] The fourth channel 14 is straight.

[0295] The fourth channel 14 and the second part 12B of the second channel 12 are coaxial.

[0296] The first part 15A of the fifth channel 15 extends between the fourth inlet E4 and the accommodating part 24 for receiving the second shut-off valve 6.

[0297] The second part 15B of the fifth channel 15 extends between the accommodating part 24 for receiving the second shut-off valve 6 and the third connection area C3.

[0298] The fourth channel 14, the second part 12B of the second channel 12 and the accommodating part 24 for receiving the second shut-off valve 6 are coaxial.

[0299] Thus, machining along the same axis enables the common formation of the fourth channel 14, the second part 12B of the second channel 12, and the housing part 24 for receiving the second shut-off valve 6. In addition, the cross-sections of the fourth channel 14 and the second part 12B of the second channel 12 can be selected to reduce pressure losses, thereby optimizing the thermodynamic performance of the thermal regulation system 100 equipped with the refrigerant distribution module 50. In other words, the channels through which the low-pressure refrigerant flows can have a larger diameter than the channels through which the high-pressure refrigerant flows.

[0300] The sixth channel 16 is straight.

[0301] The fourth connection area C4 leads to the housing part 24 for receiving the second shut-off valve 6.

[0302] Now, the operation of the thermal regulation system 100 integrated with the refrigerant distribution module 50 will be described.

[0303] Figure 1 The thermal regulation system 100 for a motor vehicle schematically shown in [the figure] includes:

[0304] - A first heat exchanger 1 configured to operate as an evaporator,

[0305] - A second heat exchanger 2 configured to operate as an evaporator,

[0306] - The refrigerant distribution module 50 as described above, wherein:

[0307] The inlet of the first exchanger 1 is connected to the third outlet S3,

[0308] The outlet of the first exchanger 1 is connected to the third inlet E3,

[0309] The inlet of the second exchanger 2 is connected to the first outlet S1,

[0310] The outlet of the second exchanger 2 is connected to the second inlet E2,

[0311] - A first refrigerant flow branch A, which successively includes along the refrigerant flow direction:

[0312] -- A compressor 7 including at least one inlet 7a and one outlet 7b,

[0313] -- A condenser 8,

[0314] -- A third expansion device 33,

[0315] -- A third heat exchanger 3 configured to selectively operate as an evaporator or a condenser,

[0316] The outlet of the third exchanger 3 is connected to the fourth inlet E4 of the distribution module 50, and the inlet 7a of the compressor 7 is connected to the second outlet S2.

[0317] - A second refrigerant flow branch B that connects the junction point R arranged on the first flow branch A to the first inlet E1 of the distribution module 50.

[0318] The condenser 8 dissipates the condensation heat of the refrigerant into the heat transfer fluid. The heat transfer fluid can be an internal air flow inside the vehicle interior. The heat transfer fluid can also be a heat transfer liquid flowing in a heat transfer liquid circuit. The heat transfer liquid circuit can include a heat exchanger configured to exchange heat with the internal air flow Fi inside the vehicle interior.

[0319] According to the example of the thermal regulation system 100 shown:

[0320] - The first exchanger 1 is configured to be thermally coupled to an element 70 of the electric powertrain of a motor vehicle.

[0321] - The second heat exchanger 2 is configured to exchange heat with the internal air flow Fi inside the vehicle interior.

[0322] - The third heat exchanger 3 is configured to exchange heat with the internal air flow Fi inside the vehicle interior.

[0323] The refrigerant module 50 is thus integrated into the thermal regulation system 100, which can operate in a vehicle interior cooling mode, a heat pump mode, or an internal dehumidification mode while ensuring the thermal regulation of the elements of the vehicle powertrain. Most of the necessary components are integrated into the module 50, allowing for a compact integration of the thermal regulation system.

[0324] The element 70 of the electric powertrain can include an electrical energy storage battery.

[0325] The element 70 of the electric powertrain can include an electronic module for controlling the electric drive motor of the vehicle.

[0326] The first refrigerant flow branch A includes a refrigerant accumulation device 9 arranged between the condenser 8 and the junction point R.

[0327] The refrigerant accumulation device 9 is a receiver dryer.

[0328] Alternatively, the thermal regulation system 100 can include a refrigerant accumulator arranged between the second outlet S2 of the compressor and the inlet 7a.

[0329] Figure 2 The thermal regulation system 100 for a motor vehicle schematically shown in... includes:

[0330] - The first heat exchanger 1, which is configured to operate as an evaporator.

[0331] - A second heat exchanger 2 configured to operate as an evaporator,

[0332] - A third heat exchanger 3 configured to selectively operate as an evaporator or a condenser,

[0333] - A refrigerant flow branch A which successively includes, along the refrigerant flow direction:

[0334] -- A compressor 7 including at least one inlet 7a and one outlet 7b,

[0335] -- A condenser 8,

[0336] -- A refrigerant accumulation device 9,

[0337] - The refrigerant distribution module 50 as described above, including a third expansion valve 33 disposed on the seventh channel 17, wherein:

[0338] The inlet 1a of the first exchanger 1 is connected to the third outlet S3,

[0339] The outlet 1b of the first exchanger 1 is connected to the third inlet E3,

[0340] The inlet 2a of the second exchanger 2 is connected to the first outlet S1,

[0341] The outlet 2b of the second exchanger 2 is connected to the second inlet E2,

[0342] The inlet 3a of the third exchanger 3 is connected to the fourth outlet S4,

[0343] The outlet 3b of the third exchanger 3 is connected to the fourth inlet E4,

[0344] The inlet 7a of the compressor 7 is connected to the second outlet S2, and

[0345] The outlet of the refrigerant accumulation device 9 is connected to the first inlet E1.

[0346] According to this embodiment, the number of components of the thermal regulation system 100 that do not form part of the refrigerant distribution module 50 is further reduced.

[0347] According to how the two shut-off valves 5, 6 and the two expansion valves 31, 32 are controlled, the described thermal regulation system 100 can operate in many operating modes.

[0348] The thermal regulation system 100 can selectively operate in various operating modes, such as a heat pump mode, a vehicle interior cooling mode, and a driveline cooling mode.

[0349] In the heat pump mode, the refrigerant continuously flows through the compressor 7, the condenser 8, and the third expansion valve 33, where it becomes a low-pressure refrigerant, through the third exchanger 3, where it evaporates and receives heat from the external air flow Fe. The substantially gaseous refrigerant enters the module 50 through the fourth inlet E4, leaves through the second outlet S2, and reaches the inlet 7a of the compressor 7, which completes the thermodynamic cycle.

[0350] The condensation heat in the exchanger 8 enables the heating of the vehicle interior.

[0351] In the vehicle interior cooling mode, the refrigerant continuously flows through the compressor 7, the condenser 8, and the third expansion valve 33 without undergoing expansion, through the third exchanger 3, where it condenses, releasing heat to the external air flow Fe. The refrigerant, which is substantially in liquid form, enters the module 50 through the fourth inlet E4, flows through the sixth channel 16, through a part of the filter 30, through the first expansion valve 31, where it becomes a low-pressure refrigerant, and leaves the module through the first outlet S1. From there, the refrigerant evaporates in the second exchanger 2, which cools the internal air flow Fi. The refrigerant from the second exchanger 2 enters the module 50 through the second inlet E2 and flows through the second channel 12 to the second outlet S2. As previously described, the refrigerant reaches the compressor inlet from there.

[0352] The condensation heat of the refrigerant dissipates in the condenser 8 and the third exchanger 3. The evaporation heat of the refrigerant is taken from the internal air flow Fi in the second exchanger 2.

[0353] In the driveline cooling mode, the refrigerant flow between the outlet 7b of the compressor 7 and the filter 30 is the same as in the previous mode. In the first connection area C1, the refrigerant flows through the third channel 13, then through the second expansion valve 32, where it becomes a low-pressure refrigerant, through the first exchanger 1, where it evaporates, absorbing heat, then through the fourth channel 14, then through the part of the second channel 12 that extends between the second connection area C2 and the third connection area C3, and reaches the second outlet S2. As previously described, the refrigerant reaches the compressor inlet from there.

Claims

1. A refrigerant distribution module (50), comprising: - A first refrigerant flow passage (11) connecting a first refrigerant inlet (E1) and a first refrigerant outlet (S1), - A second flow passage (12) connecting a second inlet (E2) and a second outlet (S2), - A third flow passage (13) connecting a first connection area (C1) arranged on the first passage (11) and a third outlet (S3), - A fourth flow passage (14) connecting a third inlet (E3) and a second connection area (C2) arranged on the second passage (12), the second connection area (C2) being between the second inlet (E2) and the second outlet (S2), - A fifth flow passage (15) connecting a fourth inlet (E4) and a third connection area (C3) arranged on the second passage (12), the third connection area (C3) being between the second connection area (C2) and the second outlet (S2), - A sixth flow passage (16) connecting a fourth connection area (C4) arranged on the fifth passage (15) and a fifth connection area (C5) arranged on the first passage (11), the fifth connection area (C5) being between the first inlet (E1) and the first connection area (C1), The sixth passage (16) includes a check valve (4), the check valve (4) being configured to allow refrigerant to flow from the fourth connection area (C4) to the fifth connection area (C5), and configured to prevent refrigerant from flowing from the fifth connection area (C5) to the fourth connection area (C4), wherein each refrigerant flow passage (11, 12, 13, 14, 15, 16) is formed by an internal recess of the same base block (20).

2. The refrigerant distribution module (50) according to claim 1, comprising: - A seventh flow passage (17) connecting a fourth outlet (S4) and a sixth connection area (C6) arranged on the first passage (11), the sixth connection area (C6) being arranged between the fifth connection area (C5) and the first inlet (E1).

3. The refrigerant distribution module (50) according to claim 1 or 2, wherein, The first passage (11) includes a first expansion valve (31) arranged between the first connection area (C1) and the first outlet (S1), and wherein the third passage (13) includes a second expansion valve (32).

4. The refrigerant distribution module (50) according to any one of the preceding claims, wherein, The first passage (11) includes a first shut-off valve (5) arranged between the first inlet (E1) and the fifth connection area (C5), and wherein the fifth passage (15) includes a second shut-off valve (6) arranged between the fourth connection area (C4) and the third connection area (C3).

5. The refrigerant distribution module (50) according to any one of the preceding claims, wherein, The base block (20) has a generally cuboid shape.

6. The refrigerant distribution module (50) according to any one of the preceding claims, wherein, The refrigerant flow passages (11, 12, 13, 14, 15, 16) are formed by a series of straight cylindrical portions that are in fluid communication with each other.

7. The dispensing module according to any one of the preceding claims, wherein, Each refrigerant flow passage (11, 12, 13, 14, 15, 16) is formed by a series of coaxial cylindrical portions or cylindrical portions extending along intersecting axes.

8. The dispensing module according to any one of the preceding claims, wherein, The first passage (11) of the base block (20) includes a first receiving portion (21) for receiving the first expansion valve (31), The first receiving portion (21) is cylindrical and extends along an axis (A21), and wherein the first passage (11) leads to the first receiving portion (21), and the axis of the first receiving portion (21) does not coincide with the axis of the first passage (11).

9. The refrigerant distribution module (50) according to any one of the preceding claims, wherein, The second inlet (E2) and the second outlet (S2) are arranged on the first face (20_1) of the base block (20), wherein the third inlet (E3) and the third outlet (S3) are arranged on the second face (20_2) of the base block (20), wherein the first outlet (S1) is arranged on the third face (20_3) of the base block (20), and wherein the first face (20_1), the second face (20_2) and the third face (20_3) are pairwise perpendicular.

10. The refrigerant distribution module (50) according to any one of the preceding claims, wherein, The receiving portion (21) for receiving the first expansion valve (31) and the receiving portion (22) for receiving the second expansion valve (32) open on the same face of the base block (20).

11. The refrigerant distribution module (50) according to any one of the foregoing claims in combination with claim 9, wherein, The second passage (12) includes a refrigerant pressure sensor (37) arranged between the second connection area (C2) and the third connection area (C3), wherein the second passage (12) includes a refrigerant temperature sensor (38) arranged between the third connection area (C3) and the second outlet (S2), and wherein the refrigerant pressure sensor (37) and the refrigerant temperature sensor (38) are arranged on the fourth face (20_4) of the base block (20) opposite to the third face (20_3).

12. The refrigerant distribution module (50) according to any one of the preceding claims, comprising an interface flange (40) forming an interface with a first heat exchanger (1), the interface flange (40) comprising: - a first transmission passage (41) connecting the third outlet (S3) of the module (50) to the refrigerant inlet (1a) of the first heat exchanger (1), - a second transmission passage (42) connecting the outlet (1b) of the first heat exchanger (1) and the third inlet (E3) of the module (50), The interface flange (40) is rigidly fixed to the base block (20) and the first heat exchanger (1).

13. The refrigerant distribution module (50) according to any one of the preceding claims, comprising a first heat exchanger (1) arranged in an extension of the base block (20) of the refrigerant distribution module.

14. A thermal regulation system (100) for a motor vehicle, comprising: - a first heat exchanger (1) configured to operate as an evaporator, - a second heat exchanger (2) configured to operate as an evaporator, - the refrigerant distribution module (50) according to any one of the preceding claims, wherein: The inlet of the first exchanger (1) is connected to the third outlet (S3), The outlet of the first exchanger (1) is connected to the third inlet (E3), The inlet of the second exchanger (2) is connected to the first outlet (S1), The outlet of the second exchanger (2) is connected to the second inlet (E2), - A first refrigerant flow branch (A), which successively includes in the refrigerant flow direction: -- A compressor (7), including at least one inlet (7a) and one outlet (7b), -- A condenser (8), -- A third expansion device (33), -- A third heat exchanger (3), configured to operate selectively as an evaporator or a condenser, The outlet of the third exchanger (3) is connected to the fourth inlet (E4) of the distribution module (50), and the inlet (7a) of the compressor (7) is connected to the second outlet (S2), - A second refrigerant flow branch (B), which connects a junction point (R) arranged on the first flow branch (A) to the first inlet (E1) of the distribution module (50).

15. The thermal regulation system (100) according to claim 14, wherein: - The first exchanger (1) is configured to be thermally coupled to an element (70) of an electric powertrain of a motor vehicle, - The second heat exchanger (2) is configured to exchange heat with an internal air flow (Fi) inside the vehicle, - The third heat exchanger (3) is configured to exchange heat with an internal air flow (Fi) inside the vehicle.

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