Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating [HVAC] devices
  • B60H1/00492—Heating, cooling or ventilating [HVAC] devices comprising regenerative heating or cooling means, e.g. heat accumulators
  • B60H1/005—Regenerative cooling means, e.g. cold accumulators
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating [HVAC] devices
  • B60H1/32—Cooling devices
  • B60H1/3204—Cooling devices using compression
  • B60H1/323—Cooling devices using compression characterised by comprising auxiliary or multiple systems, e.g. plurality of evaporators, or by involving auxiliary cooling devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
  • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
  • F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat

Definitions

• the invention relates to an air conditioning system for a motor vehicle with a refrigerant circuit, which comprises a compressor, a condenser, an expansion valve and a latent cold storage device, from which heat can be extracted by means of the refrigerant circuit. This removal of heat is known as charging.
• the air conditioning system further comprises means for cooling air, which are designed such that heat is extracted from the air and the heat is supplied to the latent cold store. This supply of heat is called discharging.
• Such an air conditioning system is used in particular for trucks. It is used there in particular as a parking cooler.
• a parking cooler for a motor vehicle is known with a refrigerant circuit, which comprises a compressor, a condenser, a collector and at least one ice storage unit.
• the ice storage unit consists of an evaporator with expansion element and an ice storage device surrounding it. Furthermore, a further evaporator with an expansion element is connected in parallel to the at least one ice storage unit, it being possible to control via appropriate changeover valves whether the refrigerant flows through the further evaporator or the evaporator of the ice storage unit.
• the compressor is mechanically driven by a drive motor of the vehicle and can be coupled to it by means of a magnetic coupling via a V-belt.
• the object of the invention is to provide a compact air conditioning system which is suitable for cooling a vehicle when the vehicle is stationary.
• the object is achieved by features of the independent claim.
• Advantageous embodiments of the invention are characterized in the subclaims.
• the invention is characterized by an air conditioning system for a motor vehicle with a first refrigerant circuit, which comprises an electrically driven compressor, a condenser, an expansion valve and a latent cold store, from which heat is extracted by means of the refrigerant circuit, and with means for cooling Air that is designed so that heat is extracted from the air and the heat is supplied to the latent cold storage.
• the power of the compressor can be set independently of the rotational speed of a drive shaft of the motor vehicle by means of the electrically driven compressor, and if necessary electrical energy can also be made available to the compressor independently of the drive of the motor vehicle. As a result, a predeterminable amount of heat can be removed from the latent cold storage in a simple manner even in extreme heat.
• the loading of the latent cold storage of the air conditioning system can also take place quickly when the compressor of the primary air conditioning system is operated at its capacity limit.
• the latent cold storage is also characterized by a very high specific cooling capacity. This has the advantage that the air conditioning system can be made very compact. It can draw a large amount of heat from the air, especially when the vehicle is stationary, when the drive shaft is not rotating.
• the air conditioning system has a coolant circuit which comprises a pump, the latent cold store and a heat exchanger, via which heat is extracted from the air and the heat then the latent cold storage is supplied.
• a coolant circuit which comprises a pump, the latent cold store and a heat exchanger, via which heat is extracted from the air and the heat then the latent cold storage is supplied.
• a fan is assigned to the heat exchanger which influences the air flow through the heat exchanger and which at the same time influences the air flow through a heating element.
• the heating element is a heating heat exchanger through which a fluid flows, which can be heated by means of a fuel heating device.
• a particularly high heating output is possible with a heating element designed in this way.
• the latent cold storage is arranged such that the air to be cooled flows through the latent cold storage and is thereby cooled.
• the air conditioning system can be made particularly compact.
• the refrigerant circuit comprises several latent cold stores. In this way, cooling can take place at several points in the motor vehicle. This is particularly advantageous in trucks which, in addition to a driver's cabin, also have a sleeping cabin designed separately from them.
• the air conditioning system is assigned a generator which is driven by a drive shaft of a drive of the internal combustion engine and thus provides the electrical energy of the electrically driven compressor.
• the electrically driven compressor can thus be operated at high power while driving.
• FIG. 1 shows a first embodiment of the air conditioning system
• FIG. 2 shows a second embodiment of the air conditioning system
• FIG. 3 shows a third embodiment of the air conditioning system
• FIG. 4 shows a fourth embodiment of the air conditioning system
• FIG. 5 shows a fifth embodiment of the air conditioning system
• FIG. 6 shows a sixth embodiment of the air conditioning system
• An air conditioning system (FIG. 1) is arranged in a motor vehicle, in particular in a truck. It has a refrigerant circuit 1, which comprises an electrically driven compressor 2, a condenser 4, to which a condenser blower 6 is assigned, a collector 8, an expansion valve 10 and a latent cold store 12.
• the expansion valve 10 can be controllable or can also be designed as a throttle.
• the compressor 2 is connected on the output side via a first line 14 to the condenser 4, which in turn is connected on the output side via a second line 16 to the collector 8, which also preferably comprises a dryer.
• the collector 8 is connected via a third line 18 to the expansion valve 10, which is connected on the output side to the latent cold store via a fifth line 22.
• the latent cold storage 12 is connected on the output side via a fifth line 22 to the compressor 2 on the input side.
• Electrical energy is preferably supplied to the electrically driven compressor 2 by a generator 24 which is driven by a drive shaft 26 of a drive 28 of the motor vehicle.
• the drive 28 can be an internal combustion engine, for example.
• the electrically driven compressor can also be supplied with electrical energy in some other way, for example by means of a fuel cell or another element that emits electrical energy, such as a battery.
• the electrical energy can be supplied to the electrically driven compressor from any combination of the elements listed as examples.
• the electrically driven Compressor 2 can be operated with a power which is sufficient even under extreme operating conditions in order to extract the desired amount of heat from the latent cold storage 12.
• the refrigerant which can be R134a or CO2, for example, is compressed, as a result of which its temperature increases.
• the condenser 4 is designed to extract heat from the refrigerant via the air flowing through the condenser 4.
• the refrigerant thus liquefied and liquefied flows via the second line 16 to the collector 8 and from there via the third line 18 and to the expansion valve 10 by means of which it is expanded to a lower pressure, the temperature of the refrigerant falling sharply.
• the refrigerant then flows towards the latent cold storage 12 and extracts heat from the cold storage medium there by evaporating there.
• the then again gaseous refrigerant flows via the fifth line 22 to the electrically driven compressor 2 and is compressed there again.
• the high specific cooling capacity of the latent cold storage 12 stems essentially from the fact that energy is extracted from the cold storage medium in the latent cold storage by means of the refrigerant in such a way that a phase transition from a liquid state to a solid state takes place.
• the latent cold storage can be made compact. It is also inexpensive to manufacture.
• the condenser 4 is preferably a gas cooler and the lines 18, 22 touch in an internal heat exchanger and the collector is arranged in the line 22.
• the air conditioning system comprises a coolant circuit 30, which comprises a heat exchanger 32, a pump 34 and the latent cold storage 12.
• the latent cold storage 12 is connected by means of a sixth line 36 to the heat exchanger 32, which is connected to the output side via a seventh line 38 the pump 34 is connected on the input side.
• the pump 34 is connected on the output side to the latent cold storage 12 via an eighth line 40.
• the pump 34 is preferably electrically driven and can, for example, obtain the necessary electrical energy from a battery, not shown.
• the pump 34 pumps the coolant of the coolant circuit through the latent cold storage 12, whereby it supplies the latent cold storage 12 with heat and is thus cooled.
• the cooled coolant then flows or flows through the sixth line 36 to the heat exchanger 32, to which air is fed in a controlled manner via a fan 42, which then emits heat to the heat exchanger 32 and is thus cooled and contributes to the desired cooling of an interior of the motor vehicle.
• the heat exchanger 32 can be arranged in the area of the driver's cell or in a bedroom or living area of the motor vehicle. The heat emitted by the air flowing through heats the coolant in the heat exchanger 32 and the coolant thus heated flows via the seventh line 38 to the pump 34, from which it is pumped again into the latent cold storage 12.
• the electrically driven compressor 2 is preferably operated while the motor vehicle is in operation and heat is thus removed from the latent cold storage 12.
• the compressor 22 is preferably not driven, at most with a low electrical output.
• the pump 34 is driven as a function of the cooling power required and air is accordingly cooled in the motor vehicle by means of the coolant circuit 30.
• a heating element is also provided, which is a heating heat exchanger 44 through which a fluid, preferably a water-glycol mixture, flows, which can be heated by means of a fuel heating device 46 and via a ninth line 48 the heat exchanger 44 is supplied.
• the heating heat exchanger 44 is arranged such that the blower 44 also controls the air flowing through the heating heat exchanger 44. So with just one blower 44 both air flowing through the heat exchanger 44 and the air flowing through the heat exchanger 32 are controlled.
• an air heating element 50 is provided which, for example, can be designed as a PTC resistance element and thus converts electrical energy into heat, and which is arranged such that the air heating element 50 flows past it Air quantity is controlled by the fan 42.
• the air heating element 50 can also be designed as a fuel-air heater, for example.
• the blower 42 is assigned to the latent cold storage 12 and controls such that the air which is to be cooled flows through the latent cold storage or flows past cooling ribs assigned to it and thus releases heat to the latent cold storage 12 and with it is cooled.
• the air conditioning system can be designed to be particularly compact, since the coolant circuit 30 can be dispensed with, in particular if the air is to be cooled at several points in the motor vehicle, in this connection it is advantageous if the air conditioning system comprises a plurality of latent cold stores 12 , This plurality of latent cold stores 12 can then be arranged at the corresponding points in the vehicle, for example in the case of a truck a latent cold store 12 can be arranged in the driver's cabin and a further latent cold store 12 in a bedroom or living room designed separately therefrom.
• the fuel heater 46 and the heating heat exchanger 44 or the air heating element 50 can also be present in accordance with the configurations according to FIGS. 2 and 3.
• the fuel heater 46 is arranged in a bypass 48 of the coolant circuit 30. In a sixth embodiment of the air conditioning system, the fuel heater 46 is coupled to the sixth line 36.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Air-Conditioning For Vehicles (AREA)
• Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=34778089

Family Applications (1)

Country Status (11)

Families Citing this family (26)

Citations (6)

Family Cites Families (34)

• 2004
  • 2004-01-19 DE DE102004002715A patent/DE102004002715A1/de not_active Withdrawn
• 2005
  • 2005-01-14 KR KR1020067016142A patent/KR100812457B1/ko not_active IP Right Cessation
  • 2005-01-14 EP EP05706677A patent/EP1706282A1/de not_active Withdrawn
  • 2005-01-14 BR BRPI0506922-0A patent/BRPI0506922A/pt not_active IP Right Cessation
  • 2005-01-14 CN CNA2009100059254A patent/CN101504204A/zh active Pending
  • 2005-01-14 EA EA200601346A patent/EA009561B1/ru not_active IP Right Cessation
  • 2005-01-14 AU AU2005204993A patent/AU2005204993B2/en not_active Ceased
  • 2005-01-14 CA CA002553829A patent/CA2553829C/en not_active Expired - Fee Related
  • 2005-01-14 US US10/597,293 patent/US20080173029A1/en not_active Abandoned
  • 2005-01-14 JP JP2006548106A patent/JP2007518618A/ja active Pending
  • 2005-01-14 CN CNA2005800087076A patent/CN1933986A/zh active Pending
  • 2005-01-14 WO PCT/DE2005/000043 patent/WO2005068229A1/de active Application Filing

Patent Citations (6)

Non-Patent Citations (1)

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