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Method for determining the tightness of process air circuits in cold-air air conditioning units

A technology for air conditioning equipment, process air, used in the testing of fluid tightness, control inputs involving air characteristics, heating/cooling equipment, etc.

Active Publication Date: 2021-12-14
LIEBHERR TRANSPORTATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not feasible with pure inspection through the maintenance cover, which would necessitate a workshop stop for early identification

Method used

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  • Method for determining the tightness of process air circuits in cold-air air conditioning units
  • Method for determining the tightness of process air circuits in cold-air air conditioning units
  • Method for determining the tightness of process air circuits in cold-air air conditioning units

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0028] Figures 1a to 1d An exemplary system arrangement is shown for carrying out the method according to the invention on a cooling air-conditioning system provided for open vacuum operation.

[0029] The cold air-conditioning equipment is as Figures 1a to 1d The core parts in the arrangement constitute the refrigeration turbine, including the expansion turbine 1, the compressor 3 arranged on the same shaft as the expansion turbine 1, and the compressor 3 arranged on the shaft between the expansion turbine 1 and the compressor 3 Engine 2 between. The engine 2 is connected to a drive unit 4 . The process air circuit 6 of the cold air conditioner extends in the flow direction of the process air from the expansion turbine 1 to the compressor 3 and flows through the cooling side of the load heat exchanger 5 in order to absorb air from the passenger cabin. heat. The air conditioning air lines 9 and 10 conduct the air of the passenger compartment via the heating side of the l...

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PUM

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Abstract

The invention relates to a method for determining the tightness of a process air circuit of a cold-air air-conditioning system, wherein the air-conditioning system has a cooling turbine comprising a compressor and an expansion turbine, which is arranged in the process air cycle, wherein an engine is provided for the operation of the compressor, and wherein the compressor, expansion turbine and engine are connected by the same shaft, and wherein a calibration is performed, the cold air conditioner is calculated within the engine Several characteristic curves of the components under different frame conditions, wherein the calculated characteristic curves are saved, wherein the saved characteristic curves are extracted during a test run for determining the tightness of the process air circuit . Furthermore, the invention relates to a system comprising a cold air conditioner and a control unit connected thereto for carrying out such a method, as well as to a motor vehicle having such a system.

Description

technical field [0001] The invention relates to a method for determining the tightness of a process air circuit of a cold air conditioning system, a system comprising a cold air conditioning system and a control unit connected thereto, and a vehicle with such a system . Background technique [0002] Leakages in the process air circuit of vehicles such as air-cooled air conditioners in trains lead to a reduction in the cooling effect. Known devices can often compensate for loss of efficiency in case of leakage with higher power consumption. This fact presents difficulties in the diagnosis of leaks, since a perceptible loss of power of the device occurs only when the limit of the supplied electrical power is reached. This is the case when the cooling power requirement is high. Currently, the tightness of the process air circuit of cold-air air conditioning systems installed in vehicles can only be checked by means of a visual inspection. This would not be possible with a s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/38F24F11/64F24F11/88F24F11/89F24F110/10F24F110/30
CPCF24F11/38F24F11/64F24F11/88F24F11/89F24F2110/10F24F2110/30B60H1/00585G01M3/025F24F11/36B60H1/3229F25B9/004B60H2001/3297F25B9/06F25B2500/222F25B2700/1933F25B2700/21151
Inventor 安妮卡特林·弗兰肯贝格尔斯特凡·赫雷尔斯多费尔安德里亚斯·克拉万贾
Owner LIEBHERR TRANSPORTATION SYST