Heat transfer medium circuit system, vehicle, method for heating a vehicle cabin, and pump-valve distribution unit

Abstract

The invention relates to an indirect heat transfer medium circuit system (2) for a vehicle, wherein, in order to heat a vehicle cabin, a liquid heating circuit section conducted over a first heat exchanger (12) intended for heating the vehicle cabin can, by means of associated control valve functions (SV1, SV2, MWV1, MWV2), be fluidically adjusted to be parallel to and / or in series with a liquid cooling circuit section conducted over a second heat exchanger (14) intended for cooling the vehicle cabin, the fluidic adjustment enabling a parallel connection and / or a series connection of the two heat exchangers (12, 14) in order to heat the vehicle cabin. The invention also relates to a vehicle comprising such a heat transfer medium circuit system (2) and to a method for heating a vehicle cabin.

Description

[0001] Description

[0002] Heat transfer medium circuit system, vehicle, method for heating a vehicle cabin and pump-valve distribution unit

[0003] The present invention relates to a heat transfer medium circuit system for a vehicle and to a vehicle having such a heat transfer medium circuit system. The invention further relates to a method for heating a vehicle cabin.

[0004] In electric vehicles, it is necessary to control the temperature of both components of an electric drive train and at least one battery that supplies these components.

[0005] The object of the present invention is to provide an improved heat transfer medium circuit or an improved heat transfer medium circuit system.

[0006] Another object of the present invention is to enable improved heating of a vehicle cabin.

[0007] This object is achieved by a heat transport medium circuit system proposed and protected according to claim 1.

[0008] The proposed heat transport medium circuit system represents a so-called indirect system in which heat or energy is transported indirectly, i.e. indirectly via the fluid circuit system to the individual heat sinks of the vehicle.

[0009] This allows heat and energy distribution to be implemented largely via the liquid circuit system, i.e., based on a liquid, such as a water-glycol mixture. This has the advantage that the refrigeration circuit—also called a CRU (Compact Refrigerant Unit)—can be greatly simplified and designed to be very compact and as small as possible. This also allows the amount of refrigerant used to be minimized, whether it be a synthetic refrigerant such as R134a or R1234yf, or a natural refrigerant such as R744 or R290.

[0010] The proposed optimization of heat emission or heat dissipation to the vehicle cabin also allows the amount of liquid in the liquid circulation system to be reduced to a minimum.

[0011] Furthermore, the proposed heat transfer medium circuit system enables efficient vehicle cabin heating. By fluidically setting a section of a liquid heating circuit (circuit) routed via a first heat exchanger for heating the vehicle cabin to a section of a liquid cooling circuit (circuit) routed via a second heat exchanger for cooling the vehicle cabin via associated control valve functions, a parallel and / or series connection of the two heat exchangers for heating the vehicle cabin is effected - selectively or as needed. Thus, the second heat exchanger, which is intended per se or otherwise for cooling the vehicle cabin, can advantageously also be used - selectively or as needed - for heating the vehicle cabin.

[0012] A certain loss of dynamics in the heat emission or heat dissipation to the vehicle cabin, which is evident as such in a cascaded heat or energy transfer from a refrigerant of the refrigerant circuit (system) to a liquid of the liquid circuit (system) in such an indirect system, is thereby advantageously completely compensated.

[0013] This parallel and / or series connection of the two heat exchangers increases the surface area used to heat the vehicle cabin. This also improves heat transfer and heat dissipation to the vehicle cabin. Furthermore, the flow temperatures to the two heat exchangers for the vehicle cabin can be reduced.

[0014] Furthermore, the heat exchangers intended for the vehicle cabin can also be made smaller.

[0015] The proposed heat transfer medium circuit system thus contributes to weight and cost savings.

[0016] In electric vehicles, such an increase in efficiency also results in an increase in the range of a vehicle's battery. This means that the vehicle's energy storage system or battery is used more to propel the vehicle and less to provide heat or energy to regulate the temperature of the vehicle cabin and the vehicle battery.

[0017] The said control valve functions are to be understood in particular as being able to be implemented by at least one multi-way valve which can fluidically connect liquid-conducting line sections within a first, multi-part housing of the valve and line system or the liquid circuit (circuit) system - selectively or as required - for example via different heights of the multi-way valve - or along a longitudinal axis or longitudinal extension of the multi-way valve.

[0018] In one embodiment, an associated first one-way control valve function is provided, arranged or implemented between an inlet line section to the first heat exchanger for heating the vehicle cabin and an inlet line section to the second heat exchanger for cooling the vehicle cabin, wherein an associated second one-way control valve function is provided, arranged or implemented between an outlet line section from the first heat exchanger for heating the vehicle cabin and an outlet line section from the second heat exchanger for cooling the vehicle cabin in order to be able to effect the parallel connection of the two heat exchangers for heating the vehicle cabin.

[0019] In a further embodiment, alternatively, a first and a second multi-way control valve function are provided, arranged or implemented, each in the form of a 3 / 2-way control valve function, in a drain line section from the first heat exchanger for heating the vehicle cabin, wherein the second 3 / 2-way control valve function is fluidically arranged downstream of the first 3 / 2-way control valve function. The first 3 / 2-way control valve function connects the drain line section from the first heat exchanger for heating the vehicle cabin to an inlet line section to the second heat exchanger for cooling the vehicle cabin, wherein the second 3 / 2-way control valve function connects a drain line section from the second heat exchanger for cooling the vehicle cabin to the drain line section from the first heat exchanger for heating the vehicle cabin, in order to enable orto effect.

[0020] In one embodiment, a second section of the second fluid circuit is guided via a battery for supplying an electric drive train, wherein the second section of the second fluid circuit is fluidically connected in parallel to the first section of the second fluid circuit.

[0021] In a further embodiment, a third one-way control valve function can be provided or arranged or implemented in the second section of the second liquid circuit downstream of the battery in order to be able to prevent heat transport to the battery at least in sections.

[0022] In a further embodiment, a first section of the first fluid circuit, which is fluidically connected in parallel to the second section of the first fluid circuit, is guided via at least one first radiator for exchanging heat between the fluid circuit system and a vehicle environment and optionally via at least one component of the electric drive train.

[0023] In a further embodiment, a fourth one-way control valve function is provided, arranged, or implemented in the second section of the first fluid circuit in the inlet line section to the second heat exchanger for the vehicle cabin. In addition, a fifth one-way control valve function can also be provided, arranged, or implemented in the outlet line section from the second heat exchanger for the vehicle cabin.

[0024] In a further embodiment, the first section of the first fluid circuit (circuit) can also be routed through a second radiator, which can optionally be connected fluidically in series and / or in parallel. The first radiator can be fluidically arranged upstream of the component of the electric drive train, and the second radiator can be fluidically arranged downstream of the component of the electric drive train.

[0025] In order to modularize the proposed heat transfer medium circuit (circuit) system, it is proposed to design its liquid circuit (circuit) system in such a way that at least the first and / or the second liquid pump, at least one of the aforementioned control valve functions of the valve and line system and at least some of the liquid line sections of the valve and line system are accommodated in a multi-part first housing of the liquid circuit (circuit) system or are integrated into this first housing, to which the at least one heat source and the at least one heat sink of the vehicle are fluidically connected via associated, separate lines connected to the first housing.

[0026] In one embodiment, all fluid pumps, the individual control valve functions of the valve and line system mentioned above, as well as all fluid line sections of the valve and line system, except for those assigned, separate fluid line sections or lines, are accommodated in this first housing or integrated into this first housing, via which the at least one heat source and the at least one heat sink of the vehicle are connected to the first housing or are fluidically connected to this first housing.

[0027] This first housing functions as a pump-valve distribution unit, in which the individual valve system modes and the aforementioned control valve functions can be implemented by at least one multi-way valve or multiple multi-way valves. Such a multi-way valve can fluidically connect fluid-carrying line sections within the first housing – selectively or as needed – across different heights of the multi-way valve or along a longitudinal axis or longitudinal extension of the multi-way valve.

[0028] In a further embodiment, with regard to the refrigerant circuit, it is proposed that at least the compressor and / or an expansion valve and / or a line section and / or a temperature sensor and / or a pressure sensor of the refrigerant circuit be housed in a multi-part second housing of the refrigerant circuit or be integrated into this second housing. This represents a further contribution to the modularization of the proposed heat transfer medium circuit system.

[0029] In one embodiment, the first and second housings are combined into one unit, forming a housing assembly which, as such, contributes to saving installation space.

[0030] This housing assembly can be combined with the first heat exchanger for the cold section of the refrigerant circuit and the second heat exchanger for the hot section of the refrigerant circuit to form an integrated assembly in the form of a (thermomodule) unit in order to achieve or provide a high degree of or the greatest possible modularization of the heat transfer medium circuit system. This also contributes to space savings. Furthermore, a vehicle or motor vehicle with a heat transfer medium circuit system of the type described above is proposed (claim 16).

[0031] In addition, a method for heating a vehicle cabin by means of an indirect heat transfer medium circuit system of the type described above is proposed (claim 17).

[0032] In addition, a pump-valve distribution unit is proposed which is designed in the form of the first housing of the type described above (claim 18).

[0033] The invention will be explained in detail below with reference to the figures. Further advantageous developments of the invention will become apparent from the dependent claims and the following description of preferred embodiments. These are shown schematically and functionally:

[0034] Fig. 1 a heat transport medium circuit system for a vehicle,

[0035] Fig. 2 shows the heat transport medium circuit system shown in Fig. 1 in a first modification and

[0036] Fig. 3 shows the heat transport medium circuit system shown in Fig. 1 in a second modification.

[0037] The heat transfer medium circuit system 2 according to Fig. 1 has a refrigerant circuit 4 which is as small or compact as possible and a liquid circuit system 6, to which the refrigerant circuit 4 is thermally connected via a first heat exchanger 8 (chiller; evaporator) for the cold section of the refrigerant circuit 6 and a second heat exchanger 10 (condenser; condenser) for the hot section of the refrigerant circuit 6.

[0038] The refrigerant circuit 4 – which as such is also referred to as a CRU (Compact Refrigerant Unit) – comprises, in addition to the two heat exchangers 8, 10, a compressor for conveying a refrigerant and an expansion valve. Furthermore, a pressure sensor and a temperature sensor are provided in the refrigerant circuit 4, at least upstream and downstream of the compressor.

[0039] The fluid circuit system 6 has a valve and line system VL, via which a plurality of fluid circuits can be set, wherein the valve system can be set to individual valve system modes for setting different fluid circuits.

[0040] The vehicle's heat sources and heat sinks are fluidically connected to this valve and line system VL via dedicated, separate lines (see connections Ai to Au). For connections Ar, As* and Au 1 on the other hand, these are those within the valve and piping system VL.

[0041] The fluid circuit system 6 also has a heating element HE downstream of the second heat exchanger 10, which can be activated as needed to heat the conveyed fluid. This heating element HE can be provided inside or outside the valve and piping system VL.

[0042] The individual valve system modes mentioned above have the following in common: A first fluid circuit (in the sense of a liquid cooling circuit) is routed, implemented, or implemented via the first heat exchanger 8, between the refrigerant circuit (in the sense of a liquid cooling circuit) and the fluid circuit system 6, to at least one heat source of the vehicle, and a second fluid circuit (in the sense of a liquid heating circuit) is routed, implemented, or implemented via the second heat exchanger 10, between the refrigerant circuit (in the sense of a liquid heating circuit) and the fluid circuit system 6, to at least one heat sink of the vehicle.

[0043] The valve and line system VL comprises at least one first electric liquid pump EWPi for pumping liquid in the first liquid circuit or liquid cooling circuit and at least one second electric liquid pump EWP2 for pumping liquid in the second liquid circuit or liquid heating circuit. In the present case, this concerns a set valve system mode for heating a vehicle cabin. The second or hot liquid circuit is connected to a first section via a first heat exchanger 12 (also called HVAC heater; HVAC Heating, Ventilation and Air Conditioning) for heating the vehicle cabin and the first or cold liquid circuit with a second section via a second heat exchanger 14 (also called HVAC cooler) for cooling the vehicle cabin.

[0044] It is proposed to set or adjust or connect the first section of the second fluid circuit (run) fluidically parallel and / or in series to the second section of the first fluid circuit (run) via associated control valve functions in order to be able to effect a parallel connection and / or a series connection of the two heat exchangers 12, 14 for heating the vehicle cabin.

[0045] In the embodiment according to Fig. 2, it is proposed to provide or arrange an associated first one-way control valve function SVi between an inlet line section 22 to the first heat exchanger 12 and an inlet line section 26 to the second heat exchanger, and an associated second one-way control valve function between an outlet line section 24 from the first heat exchanger 12 and an outlet line section 28 from the second heat exchanger 14, in order to be able to connect the two heat exchangers 12, 14 in parallel to heat the vehicle cabin. These one-way control valve functions SV1, SV2 are provided or arranged within the valve and line system VL.

[0046] In the second section of the first fluid circuit, an associated fourth one-way control valve function SV4 is provided or arranged in the inlet line section 26 to the second heat exchanger 14, and an associated fifth one-way control valve function SV5 is provided or arranged in the outlet line section 28 from the second heat exchanger 14. These two one-way control valve functions SV4, SV5 are also provided or arranged within the valve and line system VL. In the embodiment according to Fig. 3, however, it is proposed to arrange or provide an associated first and an associated second multi-way control valve function, each in the form of a 3 / 2-way control valve function MWVi, MWW, in the outlet line section 24 from the first heat exchanger 12. The second 3 / 2-way control valve function MWW is fluidically downstream of the first 3 / 2-way control valve function MVi.The first 3 / 2-way control valve function MWVi connects the drain line section 24 from the first heat exchanger 12 to the supply line section 26 to the second heat exchanger 14, and the second 3 / 2-way control valve function MWW connects the drain line section 28 from the second heat exchanger 14 to the drain line section 24 from the first heat exchanger 12. These two 3 / 2-way control valve functions MWVi, MWV2 are designed or implemented in such a way that they can cause the parallel and / or series connection of the two heat exchangers 12, 14 to heat the vehicle cabin.

[0047] In the second section of the first fluid circuit, an associated fourth one-way control valve function SV4 is also provided or arranged in the inlet line section 26 to the second heat exchanger 14. This fourth one-way control valve function SV4 is also provided or arranged within the valve and line system VL.

[0048] What is common to the embodiments according to Figures 1 to 3 is that a second section of the second fluid circuit (circuit) is guided via a battery B for supplying an electric drive train 18, wherein the second section of the second fluid circuit (circuit) is fluidically connected in parallel to the first section of the second fluid circuit (circuit).

[0049] What the embodiments according to Figs. 2 and 3 have in common is that an associated third one-way control valve function SV3 is provided or arranged in the second section of the second fluid circuit downstream of the battery B. This third one-way control valve function SV3 is also provided or arranged within the valve and line system VL. It allows fluid circulation in this second section of the second fluid circuit to be interrupted, at least in sections, if necessary.

[0050] 1 to 3 also have in common that in the second section of the second fluid circuit (run), downstream of battery B - and within the valve and line system VL - and with regard to Figs. 2 and 3, fluidically upstream of the third one-way control valve function SV3, an associated third multi-way control valve function in the form of a 3 / 2-way control valve function MWV3 is provided or arranged, via which cooled fluid from battery B can be returned if necessary in order to support or facilitate temperature control of battery B. Downstream of this third 3 / 2-way control valve function MWV3 - and within the valve and line system VL - as well as upstream of battery B (or in a supply line section to battery B), a third electric fluid pump EWP3 is also provided. In particular, if the third one-way control valve function SV3 controls the associated line orIf the associated fluid line section is completely closed or shut off, this third 3 / 2-way control valve function MWV3, in conjunction with this third electric fluid pump EWP3, enables fluid circulation within an additional fluid circuit—as part of the second section of the second fluid circuit—where this additional fluid circuit comprises battery B, the third 3 / 2-way control valve function MWV3, and the third electric fluid pump EWP3. This additional fluid circuit supports the desired temperature control of battery B.

[0051] The embodiments according to Figures 1 to 3 also have in common that a first section of the first fluid circuit, which is fluidically connected in parallel to the second section of the first fluid circuit, is routed via a first radiator 16 for exchanging heat between the fluid circuit system and a vehicle environment, as well as at least one component of the electric drive train 18. This is understood to mean at least one electric motor or electric motor for driving the vehicle, as well as at least one power electronics unit, for example in the form of an inverter, an on-board charger (OBC), a DC-DC converter, or DC-DC converter, and / or possibly in the form of further control units in the form of high-performance computers.

[0052] In this case, the first section of the first fluid circuit (run) can also be guided via a second radiator 20, which can optionally be fluidically connected in series and / or parallel via an associated fourth multi-way control valve function in the form of a 3 / 2-way control valve function MWV4.

[0053] The first radiator 16 is fluidically arranged upstream of the component of the electric drive train 18 and the second radiator 20 is fluidically arranged downstream of the component of the electric drive train 18.

[0054] All of the previously mentioned control valve functions SV1, SV2, SV3 (control valve) and MWV1, MWV2, MWV3, MWV4 (MWV = multi-way valve) of the valve and line system VL have in common that they can partially or completely open or open or close or close assigned liquid line sections - selectively or as required.

[0055] For the purpose of modularization - to form a pump-valve module - it is proposed to accommodate at least the first and / or the second liquid pump EWP1, EWP2, at least one of the aforementioned control valve functions of the valve and line system VL and at least part of the liquid line sections of the valve and line system VL in a multi-part - not shown - first housing of the liquid circuit (circuit) system 6 or to integrate them into this first housing, to which the at least one heat source and the at least one heat sink of the vehicle are fluidically connected via associated, separate lines.

[0056] In a further embodiment, all liquid pumps EWP1, EWP2, EWP3, the individual previously mentioned control valve functions of the valve and line system VL as well as all liquid line sections of the valve and line system VL are accommodated or integrated into this first housing - not shown - to which the at least one heat source and the at least one heat sink of the vehicle are fluidically connected via assigned, separate lines.

[0057] This first housing can be seen as illustrated by the rectangle with the reference symbol VL in Figures 1 to 3 - in the sense of a system boundary for this first housing - in which the valve and line system VL is accommodated or integrated except for those assigned, separate liquid line sections or lines via which the at least one heat source and the at least one heat sink of the vehicle are connected to the first housing or fluidically connected to this first housing. The individual valve system modes of the valve and line system VL as well as the aforementioned control valve functions can be represented in this first housing, namely by at least one multi-way valve which controls liquid-carrying line sections within this first, multi-part housing - selectively or as required - over different heights of the multi-way valve - or along a longitudinal axis orLongitudinal extension of the multi-way valve - can be fluidly connected to one another.

[0058] In addition, for the purpose of modularizing the refrigerant circuit (run) 4, it is proposed that at least the compressor and / or an expansion valve and / or a line section and / or a temperature sensor and / or a pressure sensor of the refrigerant circuit (run) be accommodated in a multi-part - not shown - second housing of the refrigerant circuit (run) 4 or be integrated into this second housing.

[0059] It is proposed to combine these first and second housings into a single unit, thereby forming a housing assembly. These first and second housings can be joined or connected to each other indirectly via a coupling plate.

[0060] It is further proposed to combine this housing assembly with the first heat exchanger 8 for the cold section of the refrigerant circuit 6 and the second heat exchanger 10 for the hot section of the refrigerant circuit 6 to form a (highly) integrated assembly in the form of a thermomodule unit.

[0061] To heat the vehicle cabin, the refrigerant circuit 4 is operated as a heat pump (so-called heat pump operation). This includes ambient heat pump operation. To increase the temperature in the liquid heating circuit, the compressor can be controlled accordingly. In addition, if necessary, the heating element HE can also be briefly activated to increase the temperature in the liquid heating circuit. In addition, if necessary, the temperature in the liquid heating circuit can also be increased by briefly controlling or operating at least one of the aforementioned drivetrain components, such as the electric motor, inefficiently to generate waste heat (so-called waste heat recovery).

Claims

Patent claims:

1. A heat transfer medium circuit system (2) for a vehicle, comprising: a refrigerant circuit (4) with a compressor for conveying a refrigerant, a liquid circuit system (6) to which the refrigerant circuit (4) is thermally connected via a first heat exchanger (8) for the cold section of the refrigerant circuit (6) and a second heat exchanger (10) for the hot section of the refrigerant circuit (6), wherein the liquid circuit system (6) has a valve and line system (VL) via which a plurality of liquid circuits can be set, wherein the valve system can be set to individual valve system modes for setting different liquid circuits,wherein in the individual valve system modes, a first liquid circuit - in the sense of a liquid cooling circuit - is led via the first heat exchanger (8) between the refrigerant circuit (4) and the liquid circuit system (6) to at least one heat source of the vehicle (16, 18, 20) and a second liquid circuit - in the sense of a liquid heating circuit - is led via the second heat exchanger (10) between the refrigerant circuit (4) and the liquid circuit system (6) to at least one heat sink of the vehicle (12, 14, B), at least one first electric liquid pump (EWPi) for conveying liquid in the first liquid circuit and at least one second electric liquid pump (EWP2) for conveying liquid in the second liquid circuit,wherein in a valve system mode set for heating a vehicle cabin, the second liquid circuit (circuit) with a first section via a first heat exchanger (12) for heating the vehicle cabin and the first liquid circuit (circuit) with a second section via a, second heat exchanger (14) for cooling the vehicle cabin, wherein the first section of the second liquid circuit (run) can be fluidically connected in parallel and / or in series with the second section of the first liquid circuit (run) via associated control valve functions in order to effect a parallel connection and / or a series connection of the two heat exchangers (12, 14) for heating the vehicle cabin.

2. Heat transport medium circuit (circuit) system according to claim 1, wherein a first one-way control valve function (SVi) is provided between an inlet line section (22) to the first heat exchanger (12) for heating the vehicle cabin and an inlet line section (26) to the second heat exchanger for cooling the vehicle cabin, wherein a second one-way control valve function (SV2) is provided between an outlet line section (24) from the first heat exchanger (12) for heating the vehicle cabin and an outlet line section (28) from the second heat exchanger (14) for cooling the vehicle cabin in order to effect the parallel connection of the two heat exchangers (12, 14) for heating the vehicle cabin.

3. Heat transport medium circuit (circuit) system according to claim 1, wherein a first and a second multi-way control valve function in the form of a 3 / 2-way control valve function (MWV1, MWV2) are provided in a discharge line section (24) from the first heat exchanger (12) for heating the vehicle cabin, wherein the second 3 / 2-way control valve function (MWV2) is fluidically arranged downstream of the first 3 / 2-way control valve function (MWV1), wherein the first 3 / 2-way control valve function (MWV1) connects the discharge line section (24) from the first heat exchanger (12) for heating the vehicle cabin with an inlet line section (26) to the second heat exchanger (14) for cooling the vehicle cabin, wherein the second 3 / 2-way control valve function (MWV2) connects a discharge line section (28) from the second heat exchanger (14) for cooling the vehicle cabin connects to the drain line section (24) from the first heat exchanger (12) for heating the vehicle cabin, in order to to effect the parallel connection and I or the series connection of the two heat exchangers (12, 14) for heating the vehicle cabin.

4. Heat transport medium circuit system according to one of the preceding claims, wherein a second section of the second liquid circuit is guided via a battery (B) for supplying an electric drive train (18), wherein the second section of the second liquid circuit is fluidically connected in parallel to the first section of the second liquid circuit.

5. Heat transfer medium circuit system according to claim 4, wherein a third one-way control valve function (SV3) is provided in the second section of the second liquid circuit downstream of the battery (B).

6. Heat transport medium circuit (circuit) system according to one of the preceding claims, wherein a first section of the first liquid circuit (circuit), which is fluidically connected in parallel to the second section of the first liquid circuit (circuit), is guided via at least one first radiator (16) for exchanging heat between the liquid circuit (circuit) system and a vehicle environment and optionally via at least one component of a / the electric drive train (18).

7. Heat transfer medium circuit system according to claim 6, wherein a fourth one-way control valve function (SV4) is provided in the second section of the first liquid circuit in the inlet line section (26) to the second heat exchanger (14) for the vehicle cabin.

8. Heat transfer medium circuit system according to claim 7, wherein a fifth one-way control valve function (SV5) is provided in the drain line section (28) from the second heat exchanger (14) for the vehicle cabin.

9. Heat transport medium circuit system according to one of claims 6 to 8, wherein the first section of the first liquid circuit also has a second radiator (20) which can optionally be connected fluidically in series and / or in parallel.

10. Heat transport medium circuit system according to claim 9, wherein the first radiator (16) is fluidically arranged upstream of the component of the electric drive train (18) and the second radiator (20) is fluidically arranged downstream of the component of the electric drive train (18).

11. Heat transport medium circuit (circuit) system according to one of the preceding claims, wherein at least the first and / or the second liquid pump (EWPi, EWP2), at least one of the control valve functions of the valve and line system (VL) and at least some of the liquid line sections of the valve and line system (VL) are accommodated in a multi-part first housing of the liquid circuit (circuit) system (6), to which the at least one heat source and the at least one heat sink of the vehicle are fluidically connected via associated, separate lines connected to the first housing.

12. Heat transport medium circuit (circuit) system according to claim 11, wherein all liquid pumps (EWP1, EWP2, EWP3), the individual control valve functions of the valve and line system (VL) and all liquid line sections of the valve and line system (VL) are accommodated in the first housing, to which the at least one heat source and the at least one heat sink of the vehicle are fluidically connected via associated, separate lines connected to the first housing.

13. Heat transfer medium circuit system according to one of the preceding claims, wherein at least the compressor and / or an expansion valve and / or a line section and / or a temperature sensor and / or a pressure sensor of the refrigerant circuit are accommodated in a multi-part second housing of the refrigerant circuit.

14. The heat transfer medium circuit system according to claim 13, wherein the first and second housings are combined into a unit and thereby form a housing assembly.

15. Heat transfer medium circuit system according to claim 14, wherein said housing assembly is combined with the first heat exchanger (8) for the cold section of the refrigerant circuit (6) and the second heat exchanger (10) for the hot section of the refrigerant circuit (6) to form an integrated assembly in the form of a (thermomodule) unit.

16. Vehicle with a heat transfer medium circuit system according to one of the preceding claims.

17. A method for heating a vehicle cabin by means of an indirect heat transfer medium circuit system according to one of claims 1 to 15, in which a section of a liquid heating circuit, which is guided via a first heat exchanger (12) for heating the vehicle cabin, is fluidically parallel and / or in series with a section of a liquid cooling circuit, which is guided via a second heat exchanger (14) for cooling the vehicle cabin, via an associated control valve function in order to effect a parallel connection and / or a series connection of the two heat exchangers (12, 14) for heating the vehicle cabin.

18. Pump-valve distribution unit, which is designed in the form of the first housing according to claim 11 or 12, wherein this first housing has at least one multi-way valve or a plurality of multi-way valves, via which the control valve functions according to one of the preceding claims 1 to 10 can be reproduced, wherein by means of the at least one multi-way valve, liquid-conducting line sections within the first housing can be fluidically connected to one another optionally via different heights of the multi-way valve.

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