COMPRESSION REFRIGERATING MACHINE AND AIR CONDITIONING SYSTEM FOR PARKING AIR CONDITIONING FOR A MOTOR VEHICLE

Abstract

A compression refrigeration machine (2) for stationary air conditioning of a motor vehicle (10) is provided. The compression refrigeration machine (2) comprises a refrigerant circuit (3) for conducting a refrigerant and a condenser (4) for condensing the refrigerant. The compression refrigeration machine (2) comprises a coolant cooling system (5) for cooling the condenser (4) and / or the refrigerant during condensation.

Description

[0001] The present disclosure relates to a compression refrigeration machine for stationary air conditioning for a motor vehicle, an air conditioning device comprising the compression refrigeration machine, a motor vehicle comprising the air conditioning device, and / or a method for operating the air conditioning device and / or the motor vehicle.

[0002] Electric vehicles, such as battery electric vehicles (BEVs), plug-in hybrid electric vehicles (PHEVs), and fuel cell electric vehicles (FCEVs), offer the advantage of what's known as auxiliary air conditioning. This auxiliary air conditioning is typically achieved by a conventional compression refrigeration unit. The only significant difference from the air conditioning system of a combustion engine-powered vehicle is that the refrigerant compressor is electrically driven, thus operating completely independently of the combustion engine.

[0003] A major disadvantage of the conventional auxiliary air conditioning system in electrically powered vehicles is the use of a conventional (refrigerant) condenser, which must be cooled by a fan when the vehicle is stationary. The resulting noise is disturbing to vehicle occupants and other people in the immediate vicinity. Furthermore, the fan consumes electrical energy in the order of several hundred watts from the vehicle's electrical system, thus impairing the efficiency of the auxiliary air conditioning system and correspondingly impacting the vehicle's electric range.

[0004] DE 10 2012 004 002 A1 describes a vehicle with a high-temperature circuit, a low-temperature circuit, an air conditioning cooling circuit, and / or a waste heat recovery circuit. The air conditioning cooling circuit and / or the waste heat recovery circuit are each thermally coupled to the low-temperature circuit by means of a condenser, wherein the condenser can be cooled by a coolant circulating in the low-temperature circuit.

[0005] DE 10 2020 118 847 A1 describes a method for operating a cooling device for cooling a condenser of an air conditioning system of a motor vehicle. The cooling device includes a water tank for collecting condensate, a water pump, and a spray device directed at the condenser. The method includes the following steps: determining current values of status parameters relating to the motor vehicle, the air conditioning system, and the cooling device; calculating a logical priority function containing at least one condition relating to at least one determined status parameter; calculating values of a performance target function with and without cooling of the condenser by spraying condensate; and controlling the water pump depending on at least one of the status parameters and on results of the logical priority function and the performance target function.

[0006] EP 1 632 373 A1 describes a motor vehicle stationary air conditioning system with a refrigerant circuit in which at least one compressor is arranged, which circulates the refrigerant in the refrigerant circuit. An air-cooled condenser is arranged in the refrigerant circuit for cooling the refrigerant coming from the compressor. Two fans are provided, one fan being mechanically driven by the motor vehicle engine and one fan being electrically driven, or at least one fan being provided, or one fan having a hybrid drive and being both mechanically and electrically driven.

[0007] Against the background of this prior art, the object of the present disclosure is to provide a device and / or a method which are each suitable for enriching the prior art.

[0008] The problem is solved by the features of the independent claims. The subordinate claims and the dependent claims each contain optional developments of the disclosure.

[0009] The task is then solved by a compression refrigeration machine for stationary air conditioning of a motor vehicle.

[0010] The compression refrigeration machine includes a refrigerant circuit for carrying a refrigerant.

[0011] The compression refrigeration machine comprises a condenser (e.g. air-cooled and / or air-coolable) for condensing the refrigerant.

[0012] The compression refrigeration machine includes a coolant cooling system for cooling the condenser and / or the refrigerant during condensation (e.g., while the refrigerant is in and / or on the condenser).

[0013] Stationary air conditioning can be understood as the air conditioning of a motor vehicle, e.g., the interior of the motor vehicle, when the motor vehicle is stationary. The compression refrigeration machine (or an air conditioning system comprising the compression refrigeration machine) can thus be operated while the motor vehicle is stationary, e.g., during a break in the motor vehicle's journey and / or when a drive engine of the motor vehicle is stationary.

[0014] The compression chiller described above offers a number of advantages. Among other things, it provides a compression chiller that, through the use of (additional) coolant cooling for the condenser, can significantly reduce noise emissions, so that they are almost completely eliminated, for example, when the compression chiller is in operation for stationary air conditioning.

[0015] The compression refrigeration machine can advantageously be designed without a fan, meaning that it is not necessary to operate a fan for air cooling of the condenser when the compression refrigeration machine is operated for stationary air conditioning and the vehicle is stationary. Instead, the cooling of the refrigerant or the condenser can be ensured entirely by the coolant cooling system when the vehicle is stationary, and when the vehicle is moving, for example, together with an air mass flow from a headwind.

[0016] In addition to reducing noise emissions, the power and energy consumption of the stationary air conditioning can be significantly reduced, for example, to about 1 / 10.

[0017] Possible further developments of the air conditioning system described above are explained in detail below.

[0018] The condenser may have at least one refrigerant flow channel, which may be integrated into the refrigerant circuit for guiding the refrigerant and / or may be designed as part of the refrigerant circuit.

[0019] The condenser may have at least one coolant flow channel, which may be integrated into the coolant cooling system and / or may be configured as part of the coolant cooling system.

[0020] The at least one refrigerant flow channel and the at least one coolant flow channel can run at least partially parallel to each other.

[0021] The coolant cooling system may comprise a coolant line and / or a coolant circuit for carrying a coolant.

[0022] It is conceivable that the coolant line and / or the coolant circuit has a dual function (i.e., a further function in addition to cooling the condenser and / or the refrigerant during condensation) and / or is already provided in the motor vehicle. The coolant line and / or the coolant circuit can be designed, for example, to cool an engine (e.g., an internal combustion engine) and / or a transmission.

[0023] The coolant cooling system may comprise at least one control element which may be arranged in the coolant line and / or in the coolant circuit for controlling and / or regulating the coolant.

[0024] The at least one control element can have a controllable coolant pump and / or a controllable control valve.

[0025] The at least one control element can be configured to control and / or regulate the coolant depending on a temperature of the coolant, e.g., to stop a flow (and / or conduction) of the coolant if the coolant has a temperature above a predetermined temperature threshold.

[0026] The compression refrigeration machine may have a (e.g. electrically operated) refrigerant compressor for compressing the refrigerant.

[0027] The compression refrigeration machine may have a refrigerant evaporator for evaporating the refrigerant (e.g. by means of heat from a vehicle interior of the motor vehicle).

[0028] The compression refrigeration machine (and / or the air conditioning system) can be designed without a fan (or without a fan).

[0029] The compression refrigeration machine may include a pump (e.g., for circulating the refrigerant). The pump may be located in the refrigerant circuit.

[0030] The condenser, the refrigerant compressor, the refrigerant evaporator and / or the pump can be arranged in the refrigerant circuit and / or be fluidly connected to the refrigerant circuit.

[0031] The above description can be summarized in other words and in a possible more concrete embodiment of the disclosure as described below, whereby the following description is not to be interpreted as limiting the disclosure.

[0032] In order to eliminate the disadvantages of conventional stationary air conditioning, the use of combined coolant (and / or refrigerant) and air cooling for a condenser for stationary air conditioning by means of a compression refrigeration machine can be provided. The conventional refrigerant condenser can be provided with additional coolant cooling through an existing or additionally installed circuit. This circuit can be controlled, for example, by an electric (additional) coolant pump and / or a control valve. This can ensure that the refrigerant is cooled completely (when stationary) or together with an air mass flow (natural convection while driving). This can also be deactivated completely if the coolant is too hot and can therefore no longer absorb any more heat. This can result in the following advantages: Noise emissions when stationary are almost completely eliminated, the power and / orThe energy consumption of the stationary air conditioning is reduced significantly, i.e. to about 1 / 10, and, if the condensation heat is introduced into the coolant circuit of the combustion engine or the transmission, for example, the warm-up behavior of these systems is improved accordingly.

[0033] Furthermore, an air conditioning system for stationary air conditioning of a motor vehicle is provided, wherein the air conditioning system comprises the compression refrigeration machine described above.

[0034] What has been described above with reference to the compression refrigeration machine also applies analogously to the air conditioning system and vice versa.

[0035] Furthermore, a motor vehicle comprising the air conditioning device (and / or the compression refrigeration machine described above) is provided.

[0036] The motor vehicle may be a passenger car, in particular an automobile, or a commercial vehicle, such as a truck.

[0037] The condenser can be arranged within the motor vehicle in such a way that it can be cooled by airflow (and / or can be flowed around by airflow) while the motor vehicle is in motion. In other words, the condenser can be arranged in an airflow path (while the motor vehicle is in motion). This allows the condenser to be advantageously cooled with minimal technical effort, e.g., without additional components, thus reducing the impact on the overall vehicle efficiency of the motor vehicle.

[0038] The refrigerant evaporator can be arranged within the motor vehicle in such a way that the refrigerant evaporator can absorb heat from the vehicle interior and / or can be surrounded by air from the vehicle interior. In other words, the refrigerant evaporator can be arranged in an air path for air from the vehicle interior.

[0039] The motor vehicle may be an electrically powered motor vehicle, e.g., a battery-electric vehicle, a hybrid vehicle, or a fuel cell vehicle.

[0040] What has been described above with reference to the compression refrigeration machine and the air conditioning system also applies analogously to the motor vehicle and vice versa.

[0041] Furthermore, a method for operating the above-described air conditioning device and / or the above-described motor vehicle (and / or the above-described compression refrigeration machine) is provided, wherein the motor vehicle (when carrying out the method) is at a standstill (and / or a drive engine of the motor vehicle is at a standstill).

[0042] The method comprises circulating the refrigerant in the refrigerant circuit to absorb heat from a vehicle interior of the motor vehicle and / or to release heat to the vehicle interior. The circulating refrigerant is condensed by the condenser or is condensable by the condenser.

[0043] The method comprises cooling the condenser and / or the refrigerant during condensation by means of the coolant cooling.

[0044] What has been described above with reference to the compression refrigeration machine and the air conditioning system and the motor vehicle also applies analogously to the process and vice versa.

[0045] Below is an optional embodiment with reference to Fig. 1 and Fig. 2 described. Fig. 1 shows schematically a compression refrigeration machine according to the disclosure for stationary air conditioning for a motor vehicle, and Fig. 2 shows schematically the motor vehicle with an air conditioning system comprising the compression refrigeration machine.

[0046] The Fig. 1, a compression refrigeration machine 2, which is merely schematically illustrated and designed for stationary air conditioning of a motor vehicle 10, comprises a refrigerant circuit 3 for conducting (or circulating) a refrigerant and a condenser 4 for condensing the refrigerant. The refrigerant circuit 3 is filled and / or can be filled with the refrigerant.

[0047] The compression refrigeration machine 2 comprises a coolant cooling system 5 for cooling the condenser 4 and / or the refrigerant during condensation.

[0048] In the embodiment shown, the condenser 4 has at least one refrigerant flow channel 4.1 and at least one coolant flow channel 4.2. The at least one refrigerant flow channel 4.1 is integrated into the refrigerant circuit 3 for guiding the refrigerant and / or is configured as part of the refrigerant circuit 3. The at least one coolant flow channel 4.2 is integrated into the coolant cooling system 5 and / or is configured as part of the coolant cooling system 5. The at least one refrigerant flow channel 4.1 and the at least one coolant flow channel 4.2 can run at least partially parallel to one another.

[0049] The coolant cooling system 5 has a coolant line 6.1 and / or a coolant circuit 6 for conveying a coolant. The coolant line 6.1 can be designed as part of the coolant circuit 6.

[0050] The coolant cooling system 5 has at least one control element 7, which is arranged to control and / or regulate the coolant in the coolant line 6.1 and / or in the coolant circuit 6. The at least one control element 7 can, for example, have or be a controllable coolant pump and / or a controllable control valve.

[0051] In the embodiment shown, the compression refrigeration machine 2 further comprises a refrigerant compressor 8, e.g., an electrically operated one, for compressing the refrigerant, and a refrigerant evaporator 9 for evaporating the refrigerant. The refrigerant evaporator 8 can be configured to absorb heat from a vehicle interior 11 of the motor vehicle 10 to evaporate the refrigerant.

[0052] Fig. 2 shows the motor vehicle 10 with the air conditioning system 1, wherein the air conditioning system 1 includes the compression refrigeration machine 2. The motor vehicle 10 may be an electrically driven motor vehicle (or an electric vehicle).

[0053] Within this motor vehicle 10, the condenser 4 can be arranged in such a way that the condenser 4 can be cooled by a wind during driving of the motor vehicle 10.

[0054] When the motor vehicle 10 is stationary, the air conditioning system 1 or the compression refrigeration machine 2 can be operated for stationary air conditioning, e.g., of the vehicle interior 11. For this purpose, the refrigerant is circulated in the refrigerant circuit 3, e.g., by means of the refrigerant compressor 8 and / or a pump of the compression refrigeration machine 2 arranged in the refrigerant circuit 3, to absorb heat from the vehicle interior 11 of the motor vehicle 10 and / or to release heat to the vehicle interior 11. The circulating refrigerant is condensed by the condenser 4 or can be condensed by the condenser 4.

[0055] At the same time, the condenser 4 and / or the refrigerant is cooled by means of the coolant cooling 5 during condensation, ie while the refrigerant is in and / or on the condenser. List of reference symbols 1 air conditioning unit 2 compression refrigeration machines 3 Refrigerant circuit 4 Capacitor 4.1 Refrigerant flow channel of the condenser 4.2 Coolant flow channel of the condenser 5 Coolant cooling 6 Coolant circuit of the coolant cooling system 6.1 Coolant line of the coolant cooling system 7 Control 8 refrigerant compressors 9 Refrigerant evaporator 10 motor vehicle 11 Interior of the motor vehicle QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2012 004 002 A1

[0004] DE 10 2020 118 847 A1

[0005] EP 1 632 373 A1

[0006]

Claims

[1] Compression refrigeration machine (2) for stationary air conditioning of a motor vehicle (10), wherein the compression refrigeration machine (2) comprises: - a refrigerant circuit (3) for carrying a refrigerant; and - a condenser (4) for condensing the refrigerant, characterized by that the compression refrigeration machine (2) comprises: - a coolant cooling system (5) for cooling the condenser (4) and / or the refrigerant during condensation. [2] Compression refrigeration machine (2) according to claim 1, characterized by that the capacitor (4) has: - at least one refrigerant flow channel which is integrated into the refrigerant circuit (3) for guiding the refrigerant and / or is designed as part of the refrigerant circuit (3); and - at least one coolant flow channel which is integrated into the coolant cooling system (5) and / or is designed as part of the coolant cooling system (5). [3] Compression refrigeration machine (2) according to claim 2, characterized by that the at least one refrigerant flow channel (4.1) and the at least one coolant flow channel (4.2) run at least partially parallel to one another. [4] Compression refrigeration machine (2) according to one of claims 1 to 3, characterized by that the coolant cooling (5) has a coolant line (6.1) and / or a coolant circuit (6) for carrying a coolant. [5] Compression refrigeration machine (2) according to claim 4, characterized by that the coolant cooling (5) has at least one control element (7) which is arranged for controlling and / or regulating the coolant in the coolant line (6.1) and / or in the coolant circuit (6). [6] Compression refrigeration machine (2) according to claim 5, characterized by that the at least one control element (7) has a controllable coolant pump and / or a controllable control valve. [7] Air conditioning device (1) for stationary air conditioning of a motor vehicle (10), characterized by that the air conditioning device (1) comprises the compression refrigeration machine (2) according to one of claims 1 to 6. [8] Motor vehicle (10), characterized by that the motor vehicle (10) comprises the air conditioning device (1) according to claim 7. [9] Motor vehicle (10) according to claim 8, characterized by that the capacitor (4) is arranged within the motor vehicle (10) in such a way that the capacitor (4) can be cooled by a wind during driving of the motor vehicle (10). [10] Method for operating the air conditioning device (1) according to claim 7 and / or the motor vehicle (10) according to claim 8 or 9, wherein the motor vehicle (10) is at a standstill, characterized by that the procedure includes: - Circulating the refrigerant in the refrigerant circuit (3) to absorb heat from a vehicle interior (11) of the motor vehicle (10) and / or to release heat to the vehicle interior (11), wherein the circulating refrigerant is condensed by the condenser (4); and - Cooling the condenser (4) and / or the refrigerant during condensation by means of the coolant cooling (5).

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