Abstract

The invention relates to a servicing device for vehicle air-conditioning systems comprising an evacuation assembly for withdrawing the coolant/compressor oil mixture from the coolant circuit of a vehicle air-conditioning system and comprising a coolant gas analyser. In said device, a gas analysis connection (161A) is provided on or in at least one of the connection lines between the servicing device (100) and the vehicle air-conditioning system. Said gas analysis connection is fluidically connected or can be fluidically connected to the coolant gas analyser (161) via an oil separator (156) that can be evacuated and that is connected at least at intervals to an evacuation assembly.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices
• F25B 45/00 - Arrangements for charging or discharging refrigerant

Abstract

The invention relates to a method for operating a service device for vehicle air conditioning systems, in particular for the self-cleaning of said device. The service device is equipped with a discharging and a filling device for suctioning the coolant/compressor oil mixture out of the coolant circuit system of a vehicle air conditioning system and for refilling the vehicle air conditioning system with coolant and compressor oil. A vacuum pump (113) is used to completely empty the coolant circuit system of the vehicle air conditioning system and/or the service device, and furthermore the vehicle air conditioning system is refilled with coolant, compressor oil, and optionally an additive using a refilling system (115, 119) with a highly pressurized coolant supply (115). According to the invention, an evacuated or at least partially evacuated flushing agent tank (153) is directly or indirectly connected to at least one of the high-pressure connectors of the service device and/or the downstream pressure tubes and/or the switching valve block via a connecting line; an additional fluid connection to the highly pressurized coolant supply results such that coolant is flushed or flows from the coolant supply into the flushing agent tank; and fluid lines and/or channels containing the coolant/compressor oil mixture from the previous servicing are entirely or partially flushed clear.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices
• F25B 45/00 - Arrangements for charging or discharging refrigerant

Abstract

The invention relates to a service unit for vehicle air-conditioning systems, which is provided with an emptying and filling device for removing the coolant or a coolant/compressor oil mixture from a vehicle air-conditioning system and replenishing the vehicle air-conditioning system with coolant and optionally with compressor oil. Said device further comprises at least one tank (126) for coolant and a vacuum pump (132) for generating a negative pressure in the vehicle air-conditioning system emptied of coolant or coolant/compressor oil mixture for a subsequent intake of coolant and optionally compressor oil into the vehicle air-conditioning system to be replenished. In order to be able to use flammable or otherwise critical coolants, such as, for example, the coolant R-1234 yf, without danger in a generic service unit for vehicle air-conditioning systems, a chimney-like gas-collecting chamber (110) having upper and lower openings (110A, 110B) is arranged inside the service unit (100) and is otherwise sealed off from the surrounding atmosphere. An active fan (120) is provided to enable ambient air to flow through the chimney-like gas-collecting chamber (110) from top to bottom.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices
• F25B 45/00 - Arrangements for charging or discharging refrigerant

Abstract

The invention relates to a method for maintaining a vehicle air-conditioning unit operated with a closed coolant circulation system, in which in a first maintenance phase a circulation mixture comprising coolant, compressor oil and optionally further mixture constituents is extracted by suction from a vehicle air-conditioning unit via a separator into a separator stage (140) by means of a compressor (112), during which process coolant is separated by means of the separator from the extracted circulation mixture, compressed, and collected and the quantity thereof is determined. In a second maintenance phase, the coolant circulation system of the vehicle air-conditioning unit is largely completely emptied by means of a vacuum pump (113). The residual gas pumped off in the second maintenance phase is conducted through the separating stage (140) by means of the compressor (112) and the quantity of residual coolant collected in the process is determined.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices
• F25B 45/00 - Arrangements for charging or discharging refrigerant

Abstract

The invention relates to a plug device (10) in the form of a cigarette lighter plug, in particular for motor vehicles, for an electric connection to a low voltage outlet (20), comprising a housing part (12, 12A, 12B) located outside of the outlet (20), comprising a contact shell (11) that can be inserted into a contact sleeve (21) of the outlet (20), with at least one clamping means (13) arranged in a housing wall recess (11A) of the contact shell having at least one clamping jaw (13A) for fixing the plug device (10) after the insertion thereof into the outlet (20), with at least one spreading means (14) for outwardly spreading the at least one clamping jaw (13A) in relation to the contact shell (11) and with means for displacing the at least one spreading means (14). In order to be able to send relatively high currents to a user through a plug device in a safe manner and/or to improve the secure handling of the plug device, the invention proposes that the means for displacing the at least one spreading means (14) comprise a pushbutton arranged on a housing part (12, 12A, 12B) outside of the plug that is designed in such a way that the at least one spreading means (14) is displaced from a resting position (R) releasing the clamping jaws (13A) into a lockable spreading position (S) of the at least one clamping jaw (13A) and vice versa.

IPC Classes  ?

• B60N 3/14 - Arrangements or adaptations of other passenger fittings, not otherwise provided for of electrically-heated lighters
• F23Q 7/00 - Incandescent ignitionIgnition using electrically-produced heat, e.g. lighters for cigarettesElectrically-heated glowing plugs

Abstract

The invention relates to a power supply device for the recreational and automobile industries, having a housing comprising an axis, and end parts loosely attached to the ends of the housing positioned in the direction of the axis, and serving as functional parts, wherein the housing has a center part configured as a pipe-like extruded part made of aluminum or the like for receiving the power source, on the two ends positioned in the extrusion direction of which a cable connector part and an operating part are attached.

IPC Classes  ?

• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

The invention relates to a portable power supply unit (100) for consumers, in particular for use in the automotive and leisure sectors. Said power supply unit comprises a housing (1) provided with a power source that is accommodated in the housing (1), connection cables for the power that comes from the housing (1) and connection prong-type clamps (9, 10) on the free ends thereof comprising compressible actuating limbs (11, 12) for the user(s), used for opening the clamping limb, and means for housing the connection clamps (9, 10) and the connection cable when they are not required, on the outer side of the housing. Said means comprise a chamber (8) that is open towards the outside and which is formed on the housing (1), the connection clamps (9, 10) can be introduced into said chamber successively and perpendicular to the clamping plane and they can be maintained by the clamping force in said chamber and the actuating limbs (11, 12) of the connection clamps can be accessible from the outside by sections (19, 20) of the chamber housing that are opposite each other, in the chamber.

IPC Classes  ?

• H01M 2/10 - Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
• H01R 11/24 - End pieces terminating in a spring clip with gripping jaws, e.g. crocodile clip

Abstract

The invention relates to a portable power supply unit (100) for consumers, in particular in the automotive and the leisure sectors. Said power supply unit comprises a stationary housing (1), a power source that is accommodated in the housing (1) and connection cables for the power that comes from the power source and means for connecting to the consumer on the free end thereof. A flue-type passage (6, 6A, 6B) for convection guiding cool air, said outlet having a lateral inlet (7;7A, 7B) in the lower region of the housing (1) and an outlet (29; 29B) in the upper region of the housing (1), is provided in order to allow the power source to be cooled as necessary with no or fewer negative effects.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H02M 3/00 - Conversion of DC power input into DC power output