EP1998968A1 - Motor vehicle air conditioning system with standstill air conditioning, and method for operating the same - Google Patents

Motor vehicle air conditioning system with standstill air conditioning, and method for operating the same

Info

Publication number
EP1998968A1
EP1998968A1 EP07711602A EP07711602A EP1998968A1 EP 1998968 A1 EP1998968 A1 EP 1998968A1 EP 07711602 A EP07711602 A EP 07711602A EP 07711602 A EP07711602 A EP 07711602A EP 1998968 A1 EP1998968 A1 EP 1998968A1
Authority
EP
European Patent Office
Prior art keywords
air conditioning
motor vehicle
air
compressor
evaporator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07711602A
Other languages
German (de)
French (fr)
Inventor
Carsten Burkhardt
Arthur Heberle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1998968A1 publication Critical patent/EP1998968A1/en
Withdrawn legal-status Critical Current

Links

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
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B60H1/3211—Control means therefor for increasing the efficiency of a vehicle refrigeration cycle
    • 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
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00764—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed
    • B60H1/00778—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed the input being a stationary vehicle position, e.g. parking or stopping
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/027—Condenser control arrangements
    • 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
    • B60H2001/3236—Cooling devices information from a variable is obtained
    • B60H2001/3248—Cooling devices information from a variable is obtained related to pressure
    • B60H2001/325—Cooling devices information from a variable is obtained related to pressure of the refrigerant at a compressing unit
    • 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
    • B60H2001/3269—Cooling devices output of a control signal
    • B60H2001/3276—Cooling devices output of a control signal related to a condensing unit
    • B60H2001/3277—Cooling devices output of a control signal related to a condensing unit to control the air flow
    • 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
    • F25B2600/00—Control issues
    • F25B2600/11—Fan speed control
    • F25B2600/111—Fan speed control of condenser fans
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1933—Suction pressures
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air

Definitions

  • the invention relates to a motor vehicle air conditioner with stationary air conditioning and method for operating such.
  • a drive of the compressor is required both when the motor vehicle is moving and when it is stationary, which is part of the refrigerant circuit of the air conditioning systems.
  • the compressor is driven by the motor vehicle engine.
  • air conditioners are known with a cold storage, which maintains the cooling performance over a period of time.
  • a longer stationary air conditioning such a memory is not sufficient.
  • the motor vehicle engine can continue to run, but also in this case the fuel consumption is relatively high.
  • CONFIRMATION SKOPJE DE 199 24 499 A1 discloses a drive device for an auxiliary device arranged on an internal combustion engine of a motor vehicle, in particular for a water pump, with an electrically controllable clutch between a drive of the internal combustion engine and a drive of the auxiliary device.
  • a map control device for constant and direct control of the clutch is provided, with maps in which clutch degrees of the clutch depending on Radiozustän- the internal combustion engine, the motor vehicle or depending on environmental parameters are stored to according to these coupling levels electrical signals to control the clutch to create.
  • an electrically controllable clutch in particular an electromagnetic clutch, is provided between the V-belt and the water pump, by means of which the drive power diverted from the crankshaft via the V-belt drive can be switched to the water pump.
  • the electromagnetic clutch is connected via an electrical control line to an electronic map control device which can be integrated in the electronic engine control.
  • maps of a map memory of the map control device coupling degrees of the clutch are stored depending on data on operating states of the internal combustion engine, the motor vehicle or the data of environmental parameters, which can be fed to the map control device via lines.
  • the data on the operating states of the motor vehicle include, for example, the driving speed in the vehicle interior set temperature, the operation of the heating or air conditioning. Typical environmental parameters are for example the outside temperature, the air pressure or the humidity.
  • a compact air conditioner in which all components are arranged in a housing.
  • the drive preferably takes place via a drive unit which is independent of the vehicle engine and which, for example, can be operated electrically.
  • a coupling is provided between the drive unit and the compressor.
  • the drive unit Via a belt and a plurality of pulleys, the drive unit is connected to various drives, in particular fan impellers, so that in general the ratio of the compressor speed and the rotational speeds of the other components is constant in each case.
  • a motor vehicle air conditioning system in particular for a stationary operation, with at least one electrically driven compressor, at least one evaporator and at least one evaporator associated with the evaporator electrically driven evaporator fan, at least one capacitor and at least one condenser associated with the condenser fan, wherein a Regulation of the voltage applied to the condenser fan in dependence on the high pressure after the compressor and the suction pressure at the inlet of the compressor is provided.
  • a map control for the condenser fan is preferably provided, so that the air flow flowing through the condenser can always be operated at the optimum operating point with regard to the cooling capacity.
  • the air conditioning system is preferably designed for intake of air from the vehicle interior and / or the environment, wherein a control is provided, which controls the time and / or temperature-controlled, the source of the intake air.
  • the timing may be such that fresh air is supplied for 30 seconds every 10 minutes.
  • the temperature control may, for example, look like that at an outside temperature of 22 ° C or less in cooling demand automatically only outside air is sucked in, the refrigerant circuit is stopped and the condenser fan are disconnected from the power supply to save energy.
  • the air supply by another fan as the evaporator blower done so that this can be separated from the power supply.
  • a control of the air supply and / or the power of the compressor for preventing icing of the evaporator is provided.
  • the control of the air supply can be done by switching from recirculation to fresh air operation and simultaneous shutdown of the compressor.
  • the control to prevent icing of the evaporator can also be done by a reduced speed of the compressor, which must be speed controlled in this case accordingly.
  • an automatic switching of the air supply takes place, in the case of a cooling demand and outside temperatures that are below the air temperature in the interior of the motor vehicle, ensures that air from the environment and no circulating air is sucked in by the evaporator fan, and that the compressor out of service is set, so that saved energy can be maintained, whereby the cooling capacity can be maintained longer with limited energy supply (eg battery operation).
  • the condenser of the air conditioner can be flowed through during normal driving operation while driving the motor vehicle, preferably from the outside by the air supplied air, whereby energy can be saved, since the condenser fan does not need to be driven.
  • the air conditioning system is preferably a compact air conditioning system arranged in a single housing. Such an air conditioner is relatively small and can possibly be retrofitted without much effort. It is preferably arranged in the roof area and / or rear area of a driver's cab.
  • FIG. 1 is a schematic representation of an air conditioner according to the first embodiment
  • Fig. 2 is a characteristic diagram of the air conditioner of Fig. 1 for the optimum voltage on the condenser fan as a function of suction pressure and high pressure at the compressor, and
  • Fig. 3 shows the relationship between the recommended room temperature as a function of the outside temperature according to DIN 1946 Part 2 [4].
  • An inventive motor vehicle air conditioning system 1 for a sleeping cabin of a truck has a refrigerant circuit (in the present case serves as
  • Refrigerant R134a but it is also possible to use other refrigerants medium, such as in particular CO 2 ), in which a compressor 2, an air cooling evaporator 3 and a refrigerant cooling serving condenser 4 is arranged, and also arranged upstream of the evaporator evaporator fan 5 and arranged in front of the condenser capacitor Blower 6, which suck in each case air.
  • the (circulating) air flow is represented in FIG. 1 by white arrows and the air flow through the condenser by black arrows.
  • compressor 2 and evaporator blower 5 and capacitor-blower 6 electrically - and thus essentially independently of the vehicle engine - drivable, in the present case the electrical system (vehicle electrical system voltage 24V present) of the motor vehicle, ie at engine standstill the batteries is used , Also, an external power source or an auxiliary power unit (APU) such as a fuel cell or a diesel / gas powered generator may be used.
  • APU auxiliary power unit
  • the air conditioner 1 is made compact, and all parts thereof are arranged in a housing 7 which is mounted in the roof area of the cab of the truck.
  • the housing 7 is a metal housing, but in principle any other suitable material may be used, in particular plastic.
  • Both the condenser and the evaporator are made of aluminum according to the present embodiment for the purpose of weight optimization.
  • the design of the air conditioner 1 is present such that the condenser 4 is located in a region of the housing 7, which can be flowed through by ambient air, so that for the cooling of the refrigerant - if any - the airstream can be used, so that in this Case - unlike in stand-by mode - no ambient air from the fan must be sucked.
  • the heated air in the condenser 4 is returned to the environment.
  • the air conditioner In order to provide a cooling capacity as energy-optimized as possible in the case of a cooling demand, the air conditioner is operated in the range of optimum efficiency, the map is stored as a function of the high pressure at the compressor outlet and the suction pressure at the compressor inlet and used for the control of the condenser fan 6 becomes.
  • the regulation of the condenser fan 6 takes place here in such a way that the fan 6 is switched on from a predetermined pressure at the compressor outlet, wherein the smallest voltage is applied to the condenser fan 6.
  • the voltage is increased with increasing pressure at the compressor outlet and taking into account the suction pressure at the compressor inlet to the rated voltage applied at full load, wherein the control is continuous, i. continuously.
  • An example of a characteristic diagram for controlling the voltage on the condenser fan is shown in FIG. 2. It must be redefined when the air conditioner is changed.
  • the blower 5 can suck both air from the vehicle interior and from the environment, in principle, a mixed operation is possible, but usually a flap is provided, which allows either circulating or fresh air operation.
  • the air is preferably sucked from the vehicle interior, as shown in Fig. 1, in order to keep energy consumption as low as possible.
  • a time-controlled, automatic changeover to fresh air mode is provided so that, for example, after 15 minutes recirculation mode fresh air is drawn in for 2 minutes. At- these regulations are also possible. In particular, a manual control is possible.
  • control also takes into account the outside temperature in conjunction with the inside temperature and the target internal temperature, wherein - in order to prevent icing of the evaporator - the compressor 2 in the case of an outside temperature below a threshold, but below the target internal temperature - if necessary also depending on the humidity - is switched off and automatically fresh air is sucked in to cool the interior by the blower.
  • This allows for corresponding boundary conditions, such as in particular sunshine at low outdoor temperatures, a significant energy savings, since only the fan for the intake of fresh air must be operated. It should be noted in general that on days with corresponding insolation in a truck cab due to the large glass surfaces, a low cooling load is already available from 10 to 15 ° C outside temperature.
  • Fig. 3 the range of the recommended room temperature (ie the average value of the air temperature in the vehicle interior and the temperatures of the enclosing surfaces) according to DIN 1946 Part 2 [4] above the outside temperature is shown.
  • the recommended minimum room temperature is above the outside temperature up to an outside temperature of 22 ° C. Under 22 0 C outside temperature is therefore the cooling of the interior, eg. The cab, through the ventilation with fresh air sufficient.
  • the problem with the operation of the evaporator is generally that even at a temperature of 22 0 C at the air inlet to the condenser and evaporator, a relative humidity of 40% and a Lucasmassen- ström through the evaporator of 3 kg / min, an evaporation temperature of 0 0 C. established. Is the air mass flow at these air temperatures lowered even further, or are the air inlet temperatures below 22 0 C 1 so the same should be set because of impending icing of the evaporator of the same. In order to prevent icing of the evaporator under such conditions, as an alternative to the above-described embodiment with intended switching to fresh air operation, a variable-speed compressor can also be used, the power of which can be correspondingly reduced at low temperatures.
  • a plurality of compressors with different cooling capacities and arranged parallel to one another in the refrigerant circuit are provided, so that a modulation of the cooling capacity is possible.
  • a suitably regulated, compact air conditioning system in the driver's cab can also be used for appropriate pre-air conditioning operation to improve starting conditions, to bridge waiting times, for example in the event of traffic jams, or in combination with a start-stop system. Automatic used at a traffic light stop.

Abstract

The invention relates to a motor vehicle air conditioning system, in particular for a standstill mode, having at least one electrically driven compressor (2), having at least one evaporator (3) and at least one electrically driven evaporator fan (5) which is assigned to the evaporator (3), and having at least one condenser (4) and at least one condenser fan (6) which is assigned to the condenser (4), wherein the voltage which is applied to the condenser fan (6) is regulated as a function of the high pressure downstream of the compressor (2) and of the suction pressure at the inlet of the compressor (2), and to a method for regulating a motor vehicle air conditioning system of said type.

Description

Kraftfahrzeug-Klimaanlage mit Standklimatisierung und Verfahren zum Automotive air conditioning system with air conditioning and method for
Betreiben einer solchenOperate such
Die Erfindung betrifft eine Kraftfahrzeug-Klimaanlage mit Standklimatisierung und Verfahren zum Betreiben einer solchen.The invention relates to a motor vehicle air conditioner with stationary air conditioning and method for operating such.
Zur Klimatisierung eines Kraftfahrzeug-Innenraums mittels einer Klimaanlage ist sowohl bei fahrendem als auch bei stehendem Kraftfahrzeug ein Antrieb des Kompressors erforderlich, der Teil des Kältemittel-Kreislaufs der Klima- anläge ist. Üblicherweise wird der Kompressor vom Kraftfahrzeug-Motor angetrieben. Für einen Idle-stop-Betrieb, d.h. einen kurzfristigen Stopp des Motors, sind Klimaanlagen mit einem Kältespeicher bekannt, welcher die Kühlleistung über eine gewisse Zeit aufrecht erhält. Für eine längere Standklimatisierung ist ein derartiger Speicher nicht ausreichend.For the air conditioning of a motor vehicle interior by means of an air conditioning system, a drive of the compressor is required both when the motor vehicle is moving and when it is stationary, which is part of the refrigerant circuit of the air conditioning systems. Usually, the compressor is driven by the motor vehicle engine. For idle-stop operation, i. a short-term stop of the engine, air conditioners are known with a cold storage, which maintains the cooling performance over a period of time. For a longer stationary air conditioning such a memory is not sufficient.
Um eine längere Standklimatisierung zu gewährleisten, sind Hilfsantriebe verbreitet. Dabei ist jedoch der Energieverbrauch relativ hoch.In order to ensure a longer stationary air conditioning, auxiliary drives are common. However, the energy consumption is relatively high.
Alternativ kann auch der Kraftfahrzeug-Motor weiterlaufen, jedoch ist auch hierbei der Kraftstoffverbrauch relativ hoch.Alternatively, the motor vehicle engine can continue to run, but also in this case the fuel consumption is relatively high.
BESTÄTIGUNGSKOPJE Aus der DE 199 24 499 A1 ist eine Antriebsvorrichtung für ein an einer Brennkraftmaschine eines Kraftfahrzeugs angeordnetes Nebenaggregat, insbesondere für eine Wasserpumpe, mit einer elektrisch steuerbaren Kupp- lung zwischen einem Antrieb der Brennkraftmaschine und einem Antrieb des Nebenaggregats bekannt. Dabei ist eine Kennfeldsteuereinrichtung zur ständigen und direkten Ansteuerung der Kupplung vorgesehen, mit Kennfeldern, in denen Kupplungsgrade der Kupplung abhängig von Betriebszustän- den der Brennkraftmaschine, des Kraftfahrzeugs oder abhängig von Umge- bungsparametem abgelegt sind, um gemäß dieser Kupplungsgrade elektrische Signale zur Steuerung der Kupplung zu erzeugen.CONFIRMATION SKOPJE DE 199 24 499 A1 discloses a drive device for an auxiliary device arranged on an internal combustion engine of a motor vehicle, in particular for a water pump, with an electrically controllable clutch between a drive of the internal combustion engine and a drive of the auxiliary device. In this case, a map control device for constant and direct control of the clutch is provided, with maps in which clutch degrees of the clutch depending on Betriebszustän- the internal combustion engine, the motor vehicle or depending on environmental parameters are stored to according to these coupling levels electrical signals to control the clutch to create.
Hierbei ist zwischen dem Keilriemen und der Wasserpumpe eine elektrisch steuerbare Kupplung, insbesondere eine elektromagnetische Kupplung, vor- gesehen, durch welche die von der Kurbelwelle über den Keilriemenantrieb abgezweigte Antriebsleistung auf die Wasserpumpe schaltbar ist. Die elektromagnetische Kupplung ist über eine elektrische Steuerleitung mit einer e- lektronischen Kennfeldsteuereinrichtung verbunden, welche in die elektronische Motorsteuerung integriert sein kann. In Kennfeldern eines Kennfeld- Speichers der Kennfeldsteuereinrichtung sind Kupplungsgrade der Kupplung abhängig von Daten über Betriebszustände der Brennkraftmaschine, des Kraftfahrzeugs oder der Daten von Umgebungsparametern abgelegt, welche der Kennfeldsteuereinrichtung über Leitungen zuführbar sind. Als Daten über die Betriebszustände der Brennkraftmaschine kommen unter anderem z.B. die Öltemperatur, die Kühlmitteltemperatur, die Abgastemperatur, die Stellung des Thermostaten, der Drosselklappenwinkel, der Luftmassendurchsatz, die Drehzahl, die Last, die Temperatur an kritischen Bauteilen, z.B. die Stegtemperatur zwischen den Zylindern, der eingelegte Gang oder die Information, ob eine Abgasrückführung oder eine Zylinderabschaltung stattfin- det, in Frage. Die Daten über die Betriebszustände des Kraftfahrzeugs umfassen beispielsweise die Fahrgeschwindigkeit, die im Fahrzeuginnenraum eingestellte Temperatur, den Betrieb der Heizungs- oder der Klimaanlage. Typische Umgebungsparameter sind z.B. die Außentemperatur, der Luftdruck oder die Luftfeuchtigkeit.In this case, an electrically controllable clutch, in particular an electromagnetic clutch, is provided between the V-belt and the water pump, by means of which the drive power diverted from the crankshaft via the V-belt drive can be switched to the water pump. The electromagnetic clutch is connected via an electrical control line to an electronic map control device which can be integrated in the electronic engine control. In maps of a map memory of the map control device coupling degrees of the clutch are stored depending on data on operating states of the internal combustion engine, the motor vehicle or the data of environmental parameters, which can be fed to the map control device via lines. As data on the operating states of the internal combustion engine come, inter alia, for example, the oil temperature, the exhaust gas temperature, the position of the thermostat, the throttle angle, the air mass flow rate, the speed, the load, the temperature at critical components, eg the web temperature between the cylinders, the engaged gear or the information as to whether an exhaust gas recirculation or a cylinder deactivation takes place, in question. The data on the operating states of the motor vehicle include, for example, the driving speed in the vehicle interior set temperature, the operation of the heating or air conditioning. Typical environmental parameters are for example the outside temperature, the air pressure or the humidity.
Aus der US 5,609,037 A ist eine kompakte Klimaanlage bekannt, bei der sämtliche Komponenten in einem Gehäuse angeordnet sind. Der Antrieb erfolgt bevorzugt über eine vom Fahrzeugmotor unabhängige Antriebseinheit, welche bspw. elektrisch betrieben werden kann. Dabei ist zwischen der Antriebseinheit und dem Kompressor eine Kupplung vorgesehen. Über einen Riemen und eine Mehrzahl von Riemenscheiben ist die Antriebseinheit mit verschiedenen Abtrieben verbunden, wie insbesondere Gebläselaufrädern, so dass in der Regel das Verhältnis der Kompressordrehzahl und der Drehzahlen der anderen Komponenten jeweils konstant ist.From US 5,609,037 A a compact air conditioner is known in which all components are arranged in a housing. The drive preferably takes place via a drive unit which is independent of the vehicle engine and which, for example, can be operated electrically. In this case, a coupling is provided between the drive unit and the compressor. Via a belt and a plurality of pulleys, the drive unit is connected to various drives, in particular fan impellers, so that in general the ratio of the compressor speed and the rotational speeds of the other components is constant in each case.
Es ist Aufgabe der Erfindung, einen verbesserte Klimaanlage mit Standklimatisierung zur Verfügung zu stellen.It is an object of the invention to provide an improved air conditioning with stationary air conditioning.
Diese Aufgabe wird gelöst durch eine Klimaanlage mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteran- sprüche.This object is achieved by an air conditioner with the features of claim 1. Advantageous embodiments are the subject of the subclaims.
Erfindungsgemäß ist eine Kraftfahrzeug-Klimaanlage vorgesehen, insbesondere für einen Standbetrieb, mit mindestens einem elektrisch angetriebenen Kompressor, mindestens einem Verdampfer und mindestens einem dem Verdampfer zugeordneten elektrisch angetriebenen Verdampfer-Gebläse, mindestens einem Kondensator und mindestens einem dem Kondensator zugeordneten Kondensator-Gebläse, wobei eine Regelung der am Kondensator-Gebläse anliegende Spannung in Abhängigkeit vom Hochdruck nach dem Kompressor und vom Saugdruck am Eintritt des Kompressors vorgese- hen ist. Dabei ist bevorzugt eine Kennfeldsteuerung für das Kondensator-Gebläse vorgesehen, so dass der den Kondensator durchströmende Luftstrom stets im optimalen Betriebspunkt in Hinblick auf die Kälteleistung betrieben werden kann.According to the invention, a motor vehicle air conditioning system is provided, in particular for a stationary operation, with at least one electrically driven compressor, at least one evaporator and at least one evaporator associated with the evaporator electrically driven evaporator fan, at least one capacitor and at least one condenser associated with the condenser fan, wherein a Regulation of the voltage applied to the condenser fan in dependence on the high pressure after the compressor and the suction pressure at the inlet of the compressor is provided. In this case, a map control for the condenser fan is preferably provided, so that the air flow flowing through the condenser can always be operated at the optimum operating point with regard to the cooling capacity.
Die Klimaanlage ist vorzugsweise für eine Ansaugung von Luft aus dem Fahrzeuginnenraum und/oder der Umgebung ausgelegt ist, wobei eine Regelung vorgesehen ist, welche zeit- und/oder temperaturgesteuert die Quelle der angesaugten Luft regelt. Die Zeitsteuerung kann bspw. derart aussehen, dass alle 10 Minuten 30 Sekunden lang Frischluft zugeführt wird. Die Temperaturregelung kann bspw. derart aussehen, dass bei einer Außentemperatur von 22°C oder weniger im Kühlbedarf automatisch ausschließlich Außenluft angesaugt wird, wobei der Kältemittelkreislauf gestoppt und das Kondensator-Gebläse von der Stromversorgung getrennt werden, um Energie zu sparen. Gegebenenfalls kann auch die Luftzufuhr durch ein anderes Gebläse als das Verdampfer-Gebläse erfolgen, so dass auch dieses von der Stromversorgung getrennt werden kann.The air conditioning system is preferably designed for intake of air from the vehicle interior and / or the environment, wherein a control is provided, which controls the time and / or temperature-controlled, the source of the intake air. For example, the timing may be such that fresh air is supplied for 30 seconds every 10 minutes. The temperature control may, for example, look like that at an outside temperature of 22 ° C or less in cooling demand automatically only outside air is sucked in, the refrigerant circuit is stopped and the condenser fan are disconnected from the power supply to save energy. Optionally, the air supply by another fan as the evaporator blower done, so that this can be separated from the power supply.
Vorzugsweise ist eine Regelung der Luftzufuhr und/oder der Leistung des Kompressors zum Verhindern eines Vereisens des Verdampfers vorgesehen. Die Regelung der Luftzufuhr kann durch eine Umschaltung von Umluftauf Frischluftbetrieb und gleichzeitigem Abschalten des Kompressors erfolgen. Die Regelung zum Verhindern eines Vereisens des Verdampfers kann jedoch auch durch eine verringerte Drehzahl des Kompressors erfolgen, welcher in diesem Fall entsprechend drehzahlregelbar sein muss.Preferably, a control of the air supply and / or the power of the compressor for preventing icing of the evaporator is provided. The control of the air supply can be done by switching from recirculation to fresh air operation and simultaneous shutdown of the compressor. However, the control to prevent icing of the evaporator can also be done by a reduced speed of the compressor, which must be speed controlled in this case accordingly.
Bevorzugt erfolgt eine automatische Umschaltung der Luftzufuhr, die im Falle eines Kühlbedarfs und bei Außentemperaturen, die unterhalb der Lufttemperatur im Innenraum des Kraftfahrzeugs liegen, sicherstellt, dass Luft aus der Umgebung und keine Umluft vom Verdampfer-Gebläse angesaugt wird, und dass der Kompressor außer Betrieb gesetzt ist, so dass Energie gespart werden kann, wodurch die Kühlleistung bei begrenztem Energievorrat (bspw. Batteriebetrieb) länger aufrecht erhalten werden kann.Preferably, an automatic switching of the air supply takes place, in the case of a cooling demand and outside temperatures that are below the air temperature in the interior of the motor vehicle, ensures that air from the environment and no circulating air is sucked in by the evaporator fan, and that the compressor out of service is set, so that saved energy can be maintained, whereby the cooling capacity can be maintained longer with limited energy supply (eg battery operation).
Der Kondensator der Klimaanlage ist bei normalem Fahrtbetrieb während der Fahrt des Kraftfahrzeugs vorzugsweise von außen durch den Fahrtwind zugeführter Luft durchströmbar, wodurch Energie gespart werden kann, da das Kondensator-Gebläse nicht angetrieben werden muss.The condenser of the air conditioner can be flowed through during normal driving operation while driving the motor vehicle, preferably from the outside by the air supplied air, whereby energy can be saved, since the condenser fan does not need to be driven.
Bei der Klimaanlage handelt es sich vorzugsweise um eine kompakte Klima- anläge, die in einem einzigen Gehäuse angeordnet ist. Eine derartige Klimaanlage baut relativ klein und kann ggf. auch ohne größeren Aufwand nachgerüstet werden. Sie ist vorzugsweise im Dachbereich und/oder Rückbereich einer Fahrerkabine angeordnet.The air conditioning system is preferably a compact air conditioning system arranged in a single housing. Such an air conditioner is relatively small and can possibly be retrofitted without much effort. It is preferably arranged in the roof area and / or rear area of a driver's cab.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die beiliegende Zeichnung näher erläutert. Hierbei zeigenIn the following the invention will be explained in more detail with reference to an embodiment with reference to the accompanying drawings. Show here
Fig. 1 eine schematische Darstellung einer Klimaanlage gemäß dem ersten Ausführungsbeispiel,1 is a schematic representation of an air conditioner according to the first embodiment,
Fig. 2 ein Kennfeld der Klimaanlage von Fig. 1 für die optimale Spannung am Kondensatorgebläse in Abhängigkeit von Saugdruck und Hochdruck am Kompressor, undFig. 2 is a characteristic diagram of the air conditioner of Fig. 1 for the optimum voltage on the condenser fan as a function of suction pressure and high pressure at the compressor, and
Fig. 3 den Zusammenhang zwischen der empfohlenen Raumtemperatur in Abhängigkeit von der Außentemperatur nach DIN 1946 Teil 2 [4].Fig. 3 shows the relationship between the recommended room temperature as a function of the outside temperature according to DIN 1946 Part 2 [4].
Eine erfmdungsgemäße Kraftfahrzeug-Klimaanlage 1 für eine Schlafkabine eines Lastkraftwagens weist einen Kältemittel-Kreislauf (vorliegend dient alsAn inventive motor vehicle air conditioning system 1 for a sleeping cabin of a truck has a refrigerant circuit (in the present case serves as
Kältemittel R134a, möglich ist jedoch auch die Verwendung anderer Kälte- mittel, wie insbesondere CO2), in dem ein Kompressor 2, ein der Luftkühlung dienender Verdampfer 3 und ein der Kältemittelkühlung dienender Kondensator 4 angeordnet ist, und ferner ein vor dem Verdampfer angeordnetes Verdampfer-Gebläse 5 und ein vor dem Kondensator angeordnetes Kon- densator-Gebläse 6 auf, welche jeweils Luft ansaugen. Die (Um- )Luftströmung ist in Fig. 1 durch weiße Pfeile und die Luftströmung durch den Kondensator durch schwarze Pfeile dargestellt.Refrigerant R134a, but it is also possible to use other refrigerants medium, such as in particular CO 2 ), in which a compressor 2, an air cooling evaporator 3 and a refrigerant cooling serving condenser 4 is arranged, and also arranged upstream of the evaporator evaporator fan 5 and arranged in front of the condenser capacitor Blower 6, which suck in each case air. The (circulating) air flow is represented in FIG. 1 by white arrows and the air flow through the condenser by black arrows.
Hierbei sind sowohl Kompressor 2 als auch Verdampfer-Gebläse 5 und Kon- densator-Gebläse 6 elektrisch - und damit im Wesentlichen unabhängig vom Fahrzeugmotor - antreibbar, wobei vorliegend das Bordnetz (Bordnetzspannung vorliegend 24V) des Kraftfahrzeugs, also bei Motorstillstand die Batterien, verwendet wird. Ebenfalls kann eine externe Stromquelle oder eine APU (auxiliary power unit), wie bspw. eine Brennstoffzelle oder ein Diesel- /Gas-betriebenes Stromaggregat verwendet werden.Here are both compressor 2 and evaporator blower 5 and capacitor-blower 6 electrically - and thus essentially independently of the vehicle engine - drivable, in the present case the electrical system (vehicle electrical system voltage 24V present) of the motor vehicle, ie at engine standstill the batteries is used , Also, an external power source or an auxiliary power unit (APU) such as a fuel cell or a diesel / gas powered generator may be used.
Die Klimaanlage 1 ist kompakt ausgebildet, und sämtliche Teile derselben sind in einem Gehäuse 7 angeordnet, das im Dachbereich der Kabine des Lastkraftwagens montiert ist. Vorliegend handelt es sich beim Gehäuse 7 um ein Metallgehäuse, prinzipiell kann jedoch auch jedes andere geeignete Material verwendet werden, wie insbesondere Kunststoff. Alternativ wäre beispielsweise eine Montage an der Rückwand der Kabine oder im Innenraum, bspw. unter der Liege der Schlafkabine, möglich. Sowohl der Kondensator als auch der Verdampfer sind gemäß dem vorliegenden Ausführungsbeispiel zwecks Gewichtsoptimierung aus Aluminium gefertigt.The air conditioner 1 is made compact, and all parts thereof are arranged in a housing 7 which is mounted in the roof area of the cab of the truck. In the present case, the housing 7 is a metal housing, but in principle any other suitable material may be used, in particular plastic. Alternatively, for example, a mounting on the rear wall of the cabin or in the interior, for example. Under the couch of the sleeping cabin, possible. Both the condenser and the evaporator are made of aluminum according to the present embodiment for the purpose of weight optimization.
Die Ausgestaltung der Klimaanlage 1 ist vorliegend derart, dass der Kondensator 4 sich in einem Bereich des Gehäuses 7 befindet, der von Umgebungsluft durchströmbar ist, so dass für die Kühlung des Kältemittels - sofern vorhanden - auch der Fahrtwind verwendet werden kann, so dass in diesem Fall - anders als im Standbetrieb - keine Umgebungsluft vom Ventilator an- gesaugt werden muss. Die im Kondensator 4 erwärmte Luft wird wieder an die Umgebung abgegeben.The design of the air conditioner 1 is present such that the condenser 4 is located in a region of the housing 7, which can be flowed through by ambient air, so that for the cooling of the refrigerant - if any - the airstream can be used, so that in this Case - unlike in stand-by mode - no ambient air from the fan must be sucked. The heated air in the condenser 4 is returned to the environment.
Um im Falle eines Kühlbedarfs möglichst energieoptimiert eine ausreichende Kälteleistung zur Verfügung zu stellen, wird die Klimaanlage im Bereich des optimalen Wirkungsgrads betrieben, dessen Kennfeld in Abhängigkeit des Hochdrucks am Kompressoraustritt und des Saugdrucks am Kompressoreintritt gespeichert ist und für die Regelung des Kondensator-Gebläses 6 verwendet wird.In order to provide a cooling capacity as energy-optimized as possible in the case of a cooling demand, the air conditioner is operated in the range of optimum efficiency, the map is stored as a function of the high pressure at the compressor outlet and the suction pressure at the compressor inlet and used for the control of the condenser fan 6 becomes.
Die Regelung des Kondensator-Gebläses 6 erfolgt dabei vorliegend derart, dass das Gebläse 6 ab einem vorgegebenen Druck am Kompressoraustritt eingeschaltet wird, wobei die kleinste Spannung an Kondensator-Gebläse 6 anliegt. Die Spannung wird mit steigendem Druck am Kompressoraustritt und unter Berücksichtigung des Saugdrucks am Kompressoreintritt bis zur Nennspannung erhöht, welche bei Volllast anliegt, wobei die Regelung kontinuierlich erfolgt, d.h. stufenlos. Ein Beispiel für ein Kennfeld zur Regelung der Spannung am Kondensator-Gebläse ist in Fig. 2 dargestellt. Es ist bei Änderungen am Klimagerät neu festzulegen.The regulation of the condenser fan 6 takes place here in such a way that the fan 6 is switched on from a predetermined pressure at the compressor outlet, wherein the smallest voltage is applied to the condenser fan 6. The voltage is increased with increasing pressure at the compressor outlet and taking into account the suction pressure at the compressor inlet to the rated voltage applied at full load, wherein the control is continuous, i. continuously. An example of a characteristic diagram for controlling the voltage on the condenser fan is shown in FIG. 2. It must be redefined when the air conditioner is changed.
Das Gebläse 5 kann sowohl Luft aus dem Fahrzeuginnenraum als auch aus der Umgebung ansaugen, wobei prinzipiell auch ein Mischbetrieb möglich ist, in der Regel jedoch eine Klappe vorgesehen ist, die entweder Umluftoder Frischluftbetrieb ermöglicht. Beim Start der Klimaanlage wird jedoch bevorzugt die Luft aus dem Fahrzeuginnenraum angesaugt, wie in Fig. 1 dargestellt, um den Energieverbrauch möglichst gering zu halten. Damit die Luftqualität im Fahrzeuginnenraum, die unter einem beständigen Umluftbetrieb leidet, nicht zu schlecht wird, ist eine zeitgesteuerte, automatische Um- schaltung auf Frischluftbetrieb vorgesehen, so dass beispielsweise nach je- weils 15 Minuten Umluftbetrieb für 2 Minuten Frischluft angesaugt wird. An- dere Regelungen sind ebenfalls möglich. Insbesondere ist auch eine Regelung von Hand möglich.The blower 5 can suck both air from the vehicle interior and from the environment, in principle, a mixed operation is possible, but usually a flap is provided, which allows either circulating or fresh air operation. When starting the air conditioner, however, the air is preferably sucked from the vehicle interior, as shown in Fig. 1, in order to keep energy consumption as low as possible. To ensure that the air quality in the vehicle interior, which suffers from a constant recirculation mode, is not too bad, a time-controlled, automatic changeover to fresh air mode is provided so that, for example, after 15 minutes recirculation mode fresh air is drawn in for 2 minutes. At- these regulations are also possible. In particular, a manual control is possible.
Ferner berücksichtigt die Regelung vorliegend auch die Außentemperatur in Verbindung mit der Innentemperatur und der Soll-Innentemperatur, wobei - um ein Vereisen des Verdampfers zu verhindern - der Kompressor 2 im Falle einer Außentemperatur unterhalb eines Grenzwerts, insbesondere aber unterhalb der Soll-Innentemperatur - ggf. auch in Abhängigkeit von der Luftfeuchtigkeit - abgeschaltet wird und automatisch Frischluft zur Kühlung des Innenraums durch das Gebläse angesaugt wird. Dies ermöglicht bei entsprechenden Randbedingungen, wie insbesondere Sonnenschein bei geringen Außentemperaturen, eine erhebliche Energieeinsparung, da lediglich das Gebläse für die Ansaugung der Frischluft betrieben werden muss. Hierbei ist allgemein anzumerken, dass an Tagen mit entsprechender Sonnen- einstrahlung bei einer LKW-Kabine, bedingt durch die großen Glasflächen, bereits ab 10 bis 15°C Außentemperatur eine geringe Kühllast vorhanden ist.Furthermore, in the present case, the control also takes into account the outside temperature in conjunction with the inside temperature and the target internal temperature, wherein - in order to prevent icing of the evaporator - the compressor 2 in the case of an outside temperature below a threshold, but below the target internal temperature - if necessary also depending on the humidity - is switched off and automatically fresh air is sucked in to cool the interior by the blower. This allows for corresponding boundary conditions, such as in particular sunshine at low outdoor temperatures, a significant energy savings, since only the fan for the intake of fresh air must be operated. It should be noted in general that on days with corresponding insolation in a truck cab due to the large glass surfaces, a low cooling load is already available from 10 to 15 ° C outside temperature.
In Fig. 3 ist der Bereich der empfohlenen Raumtemperatur (d.h. des Mittelwerts aus der Lufttemperatur im Fahrzeuginnenraum und den Temperaturen der Umschließungsflächen) nach DIN 1946 Teil 2 [4] über der Außentemperatur dargestellt. Wie aus der Darstellung ersichtlich, liegt bis zu einer Außentemperatur von 22 0C die empfohlene minimale Raumtemperatur über der Außentemperatur. Unter 22 0C Außentemperatur ist daher die Kühlung des Innenraums, bspw. der Fahrerkabine, durch die Belüftung mit Frischluft ausreichend.In Fig. 3 the range of the recommended room temperature (ie the average value of the air temperature in the vehicle interior and the temperatures of the enclosing surfaces) according to DIN 1946 Part 2 [4] above the outside temperature is shown. As can be seen from the illustration, the recommended minimum room temperature is above the outside temperature up to an outside temperature of 22 ° C. Under 22 0 C outside temperature is therefore the cooling of the interior, eg. The cab, through the ventilation with fresh air sufficient.
Problematisch beim Betrieb des Verdampfers ist allgemein, dass sich bereits bei einer Temperatur von 220C am Lufteintritt zum Kondensator und Verdampfer, einer relativen Luftfeuchtigkeit von 40% und einem Luftmassen- ström durch den Verdampfer von 3 kg/min eine Verdampfungstemperatur von O0C einstellt. Wird der Luftmassenstrom bei diesen Lufttemperaturen noch weiter gesenkt, oder liegen die Lufteintrittstemperaturen unter 220C1 so sollte wegen drohender Vereisung des Verdampfers der Kühlbetrieb desselben eingestellt werden. Um ein Vereisen des Verdampfers bei derartigen Bedingungen zu verhindern, kann alternativ zum zuvor beschriebenen Aus- führungsbeispiel mit vorgesehener Umschaltung auf Frischluftbetrieb auch ein drehzahlgeregelter Kompressor verwendet werden, dessen Leistung bei niedrigen Temperaturen entsprechend herabgesetzt werden kann.The problem with the operation of the evaporator is generally that even at a temperature of 22 0 C at the air inlet to the condenser and evaporator, a relative humidity of 40% and a Luftmassen- ström through the evaporator of 3 kg / min, an evaporation temperature of 0 0 C. established. Is the air mass flow at these air temperatures lowered even further, or are the air inlet temperatures below 22 0 C 1 so the same should be set because of impending icing of the evaporator of the same. In order to prevent icing of the evaporator under such conditions, as an alternative to the above-described embodiment with intended switching to fresh air operation, a variable-speed compressor can also be used, the power of which can be correspondingly reduced at low temperatures.
Optimal ist jedoch eine Regelung, die beide Betriebsarten vorsieht, d.h. ist der Betrieb des (Stand-)Klimageräts mit Frischluft möglich, so kann auf die Leistungsverringerung des Kompressors verzichtet werden, ist dagegen nur Umluftbetrieb möglich, so wird die Drehzahl des Kompressors entsprechend verringert.Optimal, however, is a scheme that provides for both modes, i. If the operation of the (stationary) air conditioner with fresh air is possible, it is possible to dispense with the power reduction of the compressor, whereas if only recirculation mode is possible, the speed of the compressor is correspondingly reduced.
Gemäß einer Variante in Bezug auf den Kompressor sind an Stelle des einen elektrisch angetriebenen Kompressors 2 mehrere Kompressoren mit unterschiedlicher Kälteleistung und parallel zueinander im Kältemittel-Kreislauf angeordnet vorgesehen, so dass eine Modulation der Kälteleistung möglich ist.According to a variant with respect to the compressor, instead of an electrically driven compressor 2, a plurality of compressors with different cooling capacities and arranged parallel to one another in the refrigerant circuit are provided, so that a modulation of the cooling capacity is possible.
Neben der beschriebenen Standklimatisierung der (Schlaf-)Kabine kann eine entsprechend geregelte, kompakte Klimaanlage in der Fahrerkabine auch für einen entsprechenden Betrieb zur Vorklimatisierung zur Verbesserung der Startbedingungen, zur Überbrückung von Wartezeiten, beispielsweise bei Staus, oder in Kombination mit einer Start-Stopp-Automatik bei einem Ampelstopp verwendet werden. In addition to the described stationary air conditioning of the (sleeping) cabin, a suitably regulated, compact air conditioning system in the driver's cab can also be used for appropriate pre-air conditioning operation to improve starting conditions, to bridge waiting times, for example in the event of traffic jams, or in combination with a start-stop system. Automatic used at a traffic light stop.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Kraftfahrzeug-Klimaanlage, insbesondere für einen Standbetrieb, mit mindestens einem elektrisch angetriebenen Kompressor (2), mindestens einem Verdampfer (3) und mindestens einem dem Verdampfer (3) zugeordneten elektrisch angetriebenen Verdampfer-Gebläse (5), mindestens einem Kondensator (4) und mindestens einem dem Kondensa- tor (4) zugeordneten Kondensator-Gebläse (6), dadurch gekennzeichnet, dass eine Regelung der am Kondensator-Gebläse (6) anliegende Spannung in Abhängigkeit vom Hochdruck nach dem Kompressor (2) und vom Saugdruck am Eintritt des Kompressors (2) vorgesehen ist.1. Motor vehicle air conditioning system, in particular for a stationary operation, with at least one electrically driven compressor (2), at least one evaporator (3) and at least one evaporator (3) associated electrically driven evaporator blower (5), at least one capacitor (4 ) and at least one condenser fan (6) associated with the condenser (4), characterized in that a control of the voltage applied to the condenser fan (6) in dependence on the high pressure to the compressor (2) and the suction pressure at the inlet the compressor (2) is provided.
2. Kraftfahrzeug-Klimaanlage nach Anspruch 1 , dadurch gekennzeichnet, dass eine Kennfeldsteuerung des Kondensator-Gebläses (6) für den Kondensator (4) vorgesehen ist.2. Motor vehicle air conditioning system according to claim 1, characterized in that a map control of the condenser fan (6) for the capacitor (4) is provided.
3. Kraftfahrzeug-Klimaanlage nach Anspruch 1 oder 2, dadurch gekenn- zeichnet, dass die Klimaanlage für eine Ansaugung von Luft aus dem3. Motor vehicle air conditioning system according to claim 1 or 2, characterized in that the air conditioning system for a suction of air from the
Fahrzeuginnenraum und/oder der Umgebung ausgelegt ist, wobei eineVehicle interior and / or the environment is designed, with a
Regelung vorgesehen ist, welche zeit- und/oder temperaturgesteuert die Quelle der angesaugten Luft regelt.Regulation is provided, which controls time and / or temperature-controlled, the source of the intake air.
4. Kraftfahrzeug-Klimaanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Regelung der Luftzufuhr und/oder der Leistung des Kompressors (2) zum Verhindern eines Ver- eisens des Verdampfers (3) vorgesehen ist.4. Motor vehicle air conditioning system according to one of the preceding claims, characterized in that a control of the air supply and / or the power of the compressor (2) is provided for preventing ironing of the evaporator (3).
5. Kraftfahrzeug-Klimaanlage nach einem der vorhergehenden Ansprü- che, dadurch gekennzeichnet, dass eine automatische Umschaltung der Luftzufuhr vorgesehen ist, die im Falle eines Kühlbedarfs und bei Außentemperaturen, die unterhalb der Lufttemperatur im Innenraum des Kraftfahrzeugs liegen, sicherstellt, dass Luft aus der Umgebung und keine Umluft vom Verdampfer-Gebläse (5) angesaugt wird, und dass der Kompressor (2) außer Betrieb gesetzt ist.5. Motor vehicle air conditioning according to one of the preceding claims, characterized in that an automatic switching of the air supply is provided which, in the case of a cooling demand and outside temperatures that are below the air temperature in the interior of the motor vehicle, ensures that air from the Environment and no circulating air from the evaporator fan (5) is sucked in, and that the compressor (2) is disabled.
6. Kraftfahrzeug-Klimaanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kondensator der Klimaanlage bei normalem Fahrtbetrieb während der Fahrt des Kraftfahrzeugs von von außen durch den Fahrtwind zugeführter Luft durchströmbar ist.6. Motor vehicle air conditioning system according to one of the preceding claims, characterized in that the condenser of the air conditioner during normal driving operation while driving the motor vehicle from the outside through the airstream supplied air can be flowed through.
7. Kraftfahrzeug-Klimaanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Klimaanlage kompakt in einem einzigen Gehäuse (7) angeordnet ist.7. Motor vehicle air conditioning system according to one of the preceding claims, characterized in that the air conditioner is arranged compactly in a single housing (7).
8. Kraftfahrzeug-Klimaanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Klimaanlage im Dachbereich und/oder Rückbereich einer Fahrerkabine angeordnet ist.8. Motor vehicle air conditioning system according to one of the preceding claims, characterized in that the air conditioning in the roof area and / or rear area of a driver's cab is arranged.
9. Verfahren zum Betreiben einer Kraftfahrzeug-Klimaanlage, insbesondere im Standbetrieb, mit mindestens einem elektrisch angetriebenen Kompressor (2), mindestens einem Verdampfer (3) und mindestens einem dem Verdampfer (3) zugeordneten elektrisch angetriebenen Verdampfer-Gebläse (5), mindestens einem Kondensator (4) und mindes- tens einem dem Kondensator (4) zugeordneten Kondensator-Gebläse9. A method for operating a motor vehicle air conditioning system, in particular in stationary mode, with at least one electrically driven compressor (2), at least one evaporator (3) and at least one evaporator (3) associated with the electrically driven evaporator fan (5), at least one Condenser (4) and at least one condenser fan associated with the condenser (4)
(6), dadurch gekennzeichnet, dass die am Kondensator-Gebläse (6) anliegende Spannung in Abhängigkeit vom Hochdruck nach dem Kompressor (2) und vom Saugdruck am Eintritt des Kompressors (2) geregelt wird.(6), characterized in that the on the condenser fan (6) voltage applied as a function of the high pressure after the compressor (2) and the suction pressure at the inlet of the compressor (2) is controlled.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Regelung nach einen Kennfeld erfolgt.10. The method according to claim 9, characterized in that the control is carried out according to a map.
11. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass eine Umschaltung von Umluftbetrieb auf Frischluftbetrieb erfolgt und der Kompressor (2) und das Kondensator-Gebläse (6) abgeschaltet werden, das Verdampfer-Gebläse jedoch weiter betrieben wird und/oder die Außenluft über ein anderes Gebläse angesaugt wird, wenn die Außentemperatur unter der Temperatur des Innenraums liegt und Kühlbedarf besteht. 11. The method according to claim 9 or 10, characterized in that a switchover from recirculation mode to fresh air operation takes place and the compressor (2) and the condenser fan (6) are switched off, the evaporator fan is still operated and / or the outside air is drawn in by another blower when the outside temperature is below the temperature of the interior and cooling is required.
EP07711602A 2006-03-17 2007-02-21 Motor vehicle air conditioning system with standstill air conditioning, and method for operating the same Withdrawn EP1998968A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610012749 DE102006012749A1 (en) 2006-03-17 2006-03-17 Automotive air conditioning with stationary air conditioning and method for operating such
PCT/EP2007/001472 WO2007107219A1 (en) 2006-03-17 2007-02-21 Motor vehicle air conditioning system with standstill air conditioning, and method for operating the same

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EP1998968A1 true EP1998968A1 (en) 2008-12-10

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WO (1) WO2007107219A1 (en)

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WO2007107219A1 (en) 2007-09-27

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