DE1505655A1 - Vehicle air conditioner with hydraulic drive - Google Patents

Description

BROWN, 3OVER! -SCIEAG l ^ rrheiz, the M.lo.1966

MANNHEIM ^{: c} " ^T · ^HU /" ^{J r}

: ip.- :, ^r r. 653/66

"Vehicle air conditioning unit with hydraulic drive ' ¹

In order to increase the comfort or the comfort in road and rail vehicles, there is an increasing trend towards installing air conditioning units. Such devices also have the task of shielding the fairer from the tiring influences of the outside climate. While in Suropa the KiI-mat ::: - ation is to a greater extent on the behiene in the features of : «.. _; ■ - .. has achieved a high level of comfort, practically all buses and almost all larger types of cars are equipped with air conditioning units in the '- "' .... In addition, more and more of the truck cabins are air-conditioned.

The essential components of a USji car air conditioning system are α er "rom drive motor directly driven by a V-belt Compressor acted upon by the driving wind or Kühiventüatcr Condenser, which is generally used for flexible refrigerant lines. Cooling or evaporation is provided by the fin-ribbed air cooler (Evaporator) with axial or cadial valve axors inside and the air distribution system or dosing system in the passenger compartment.

They correspond to the speeds of the compressor and condenser fans thus via a translation that may be available the respective engine speed. The fans assigned to the air cooler and used to circulate the air in the passenger compartment are generally electrically driven by DC motors, which draw the energy from the alternator.

The performance of the compressor and thus the entire cooling performance of the system is therefore dependent on the speed of the traction motor. In practice this means that they are exposed to a high incidence of heat

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(slow driving speed and low motor speed) is much lower than at low V / arr.eeiniall (high driving speed or high Kotor speed).

To avoid this disadvantage, one equips larger chillers, as it ends for buses, with a drive independent of the traction motor, e.g. by installing a small internal combustion engine, which is glued to the Energy requirements of the air conditioning is adapted. The disadvantage of such a special motor is generally in its high susceptibility to failure, especially when switching α he air conditioning and diesel-powered vehicles in the Need to have a separate drive for this Kotor :: -. Off (Otto fuel) to be carried.

In order to rule out this disadvantage, one is already there passed over, such large Cmnibus air conditioners over a ©! Hydraulic power supply to drive. This is on Drive motor has an oil pump built in, which has an oil circuit Pressure oil is supplied and thus the refrigeration machine via an oil motor drives. The essential components of the oil cycle are still an oil cooler, a collecting tank and a suction throttle on the suction side of the pump. The latter enables speed compensation, with practically no energy loss, i.e. if the suction throttle setting is selected accordingly the speed of the drive motor and thus also the speed of the oil pump fluctuate in a ratio of 1: 3 to 1: 4 without changing the speed of the motor and thus of the compressor changes significantly. It thus becomes one of the speed of the traction motor and thus achieves uniform cooling performance independent of the driving speed. The drive of the associated fan motors takes place via mechanical drive means (condenser fan) or with electric motors (cooler fan or Fans).

The aim is for such vehicle air conditioning units, regardless of whether they are car or bus air conditioning units

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acts, regardless of the speed of the i "ahrr.ütors or the driving speed of the vehicle, constant cooling capacity or constant cooling air intake, also; z low weight, compact Construction, simple maintenance and absolute operational safety, It is also important that the hydraulic and refrigeration system as well as the associated control and regulation devices independent of driver vibrations and accelerations work, regardless of whether it is i ::. the latter case of starting or 3rens deceleration or acceleration acts or uir. the accelerations that occur when cornering. Likewise, independence from the location or Inclined position (ascent, descent) - aimed.

If there is a technical need for such vehicle clinker devices, the invention is based on the object of sounding a vehicle air conditioning device of the venani.ten type, which according to the proposed "equipment" and I-au './ ei se through a lower space requirements: ₍ nir ~: _-. .:. _t -r--. opposite.

This object is achieved according to the invention in that: in a functional amalgamation, the following listed, 2UIS '! Eil well-known Xain ancestors at dez fiction ._; iien Fahrseugkl image recommends using corks:

Bas vehicle ski device is designed in a compact design, with ■ The structural and functional elements are divided into three assemblies are.

The construction and management elements of the refrigeration and hydraulic circuit are designed to be insensitive to position, so also at extreme inclination of the vehicle r.cch the full cooling capacity and the safe oil pressure management is guaranteed,

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BAD ORSGiNAL

Purely the adaptation of the drive of the refrigeration machine and the. The two hydraulic motors that drive the condenser fan are the fan motor of the refrigerating machine motor downstream in the hydraulic circuit and a bypass line with a non-return valve is provided parallel to the fan motor, thus the oil flow when the hydraulic circuit is switched off does not tear off in the following gear motor.

In order to ensure that the vehicle is leaned independently To ensure an uninterrupted flow of liquid refrigerant, the collector is via two, opposite one another Ends of the collector arranged Plüssigkeitsableitungsrohren connected to the refrigerant circuit.

The collecting line connected to the air cooler (evaporator) is laid in such a way that even when the vehicle is extremely tilted proper refrigerant and oil pressure routing is ensured.

With the aid of the attached drawing, which shows the circuit necessary for operating the vehicle air conditioning system according to the invention reproduces the refrigerant and hydraulic circuit, the invention is explained in more detail, for example.

Hit 1 denotes a compressor unit which consists of a compressor 2 built into it and an oil piston motor 4 which drives it via a V-belt 3. The hydraulic energy is made available via an on-board network 5. The oil enters a flow regulator 7 via a pressure reducer 6. These two control units cause the oil inlet for the oil motor 4 independently of the pressure fluctuations in the electrical system a constant amount of current and therefore a constant speed of the oil motor 4 and compressor 2. The piston engine 4 nachgesehaltet is a gear motor 8 which fltieeigerventilatore for driving the encryption serves sixteenth Parallel to the gear motor 8

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BAD OP'GIN'AL

there is a hang eh. «r,: slei tung kl with a check valve 9, which leg; Switching off the A ^ j-age prevents an ADreiJ · cn aer oil column. The oil whose pressure i;:. Gear motor ö was almost completely dismantled, flows back into the on-board circuit via an oil cooler Ic. If a lord circuit is not available, vine oil pump 11 must be attached to the drive motor for the hydraulic energy supply. Pressure reducing valve 6 and flow control valve 7 are then omitted. From the oil cooler Io the oil then flows to the oil tank 12 and from there via the suction throttle 13 to the pump 11. The shaft of the gear motor 8 carries an axial fan 16 which sucks the cooling air through the condenser and the oil cooler Io.

~ j ~ j Cold cycle consists of the components known per se:

·, Denser 1, condenser 14 with associated balance 15 and Condenser fan 16 and expansion valve 17 and air cooler (evaporator) 18.

X> - ^: - In the case in question, the vehicle to be air-conditioned can assume extreme inclinations both in the direction of travel and to the side, the line routing on both the collector 15 and the air cooler 18 is designed so that the flui3 of the refrigerant in none of the possible extreme inclines or the oil return may be impaired. Reduced performance or even compressor damage are thus reliably avoided. The air cooler (evaporator) 18 is also equipped with an axial fan 19 which is driven by a direct current motor 2o. There is an electrical resistance heater of a few kW under the air cooler; the system can therefore also be used to heat the passenger compartment; the energy for this is provided by the on-board electrical system.

All individual components as well as the entire oil and hydraulic circuit are also designed in such a way that they can withstand extreme climatic stresses. This is especially true with regard to the ambient temperature. Both + 4o to + 5o ° and -4o ° are taken into account here.

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BATH

Because of the built-in electric heater, which ae:;: luitkühler is connected downstream, the device can also: a ^ r.tieuchten used what 2.3. in a company with a pure V'ürnepumpensciialtung is not possible in a simple way.

BATH ORIGINAL

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Claims (1)

Claims 1. Vehicle air conditioning unit with hydraulic drive, marked by combining the following z.'J. known features: a) The vehicle air conditioner is a compact design, whereby the structural and functional elements are divided into three assemblies, b) the structural and functional elements of the refrigeration and hydraulic circuit are designed to be insensitive to position, c) for the adaptation of the two hydraulic motors serving to drive the cooler and the condenser fan, the fan is: notcr (3) the refrigeration machine motor (4) i: - '-lyöraulicireisiauf r. : Ventila tor ::. Otor (S) a bypass line (21) with e \ .- .AUckscV-agventil (9) is provided, ά) of the collector (15) is about .. 'vei, ^ARX:.: .i: .. 'ά ^ τ;, -: .-. .central ends of Sa:. :::.: ··; angeüri :: c> · ....-.,,:,.,., X ₆ ^. Λ., ~ Drainage pipes connected to the Kaiter.ixtel circuit ^. W3-s en, e) the one connected to the air cooler (Verdar.pfer) (16) Saius line is laid in such a way that even with extreme Inclined position of the vehicle a perfect! and oil return is ensured, S, iafcr-r.eugkliinagerat according to claim 1, characterized in that daii for the energy supply in the Hyäraulj & reislauf of the Clko-i.fiO.omc ^ üi * (4) of the eCälxecittel compressor (2) on the on-board >#aiu'«eugklimag<rrä * according to claim 1, characterized thereby, u' \ ii ti.ino YOw, P.'uuv.üvigmotor-driven oil pump (11) in the .'iu.l.lk ^ -t'oi. ^ liut? is provided. 0 0 9 8 3 2 I 0 1 06 BAD Blank page