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Method for operating a refrigerant circuit for a vehicle air conditioning system

A refrigeration medium and circulation circuit technology, which is applied in the direction of refrigerators, vehicle parts, refrigeration components, etc., can solve the problem of not being able to identify the start-up failure of the refrigeration medium compressor, so as to avoid refilling and component replacement, and avoid component maintenance. The effect of preventing pressure spikes

Active Publication Date: 2021-02-12
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] It is also disadvantageous in this known method that a start-up fault of the refrigerant compressor cannot be detected

Method used

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  • Method for operating a refrigerant circuit for a vehicle air conditioning system
  • Method for operating a refrigerant circuit for a vehicle air conditioning system
  • Method for operating a refrigerant circuit for a vehicle air conditioning system

Examples

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Embodiment Construction

[0055] figure 1 Shown is a refrigerant circuit 1 of a vehicle air-conditioning system, which is composed of an evaporator 2, a refrigerant compressor 3, a refrigerant condenser or a gas cooler 4, in the direction of flow of a refrigerant, for example R744 refrigerant The expansion mechanism 5 connected before the evaporator 2, the internal heat exchanger 7 and the refrigerant medium collector 8 constitute.

[0056] The regulation of the refrigerant circuit 1 takes place by means of the controller 6 as a function of the parameters supplied to the controller 6 as input variables. As input parameters, in particular pressure and temperature values ​​are detected by the pressure-temperature sensors pT1 , pT2 and pT3 , wherein alternatively pure pressure sensors can also be used. In the refrigerant circuit 1, the pressure-temperature sensor pT1 is arranged on the high pressure side after the compressor 3 in the flow direction of the refrigerant medium, and the pressure-temperature ...

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PUM

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Abstract

The present invention involves a method for running a refrigeration medium cycle. According to the provisions of the present invention, A) In order to generate the starting phase of the refrigeration medium compressor (3), the from the minimum value of the refrigeration medium compressor (ST min ) The control signal ST, b) provides the maximum control signal value (ST max ) And control signal threshold (ST SW ), Of which ST SW <ST max , C) When the control signal (ST) reaches the control signal threshold (ST SW ) And the measured high pressure pressure value (P HD ) And / or low pressure pressure value (P ND ) When meeting one of the following conditions, limit the control signal (ST) to the maximum value of the control signal (ST max ): (I) High -voltage value (p HD ) Smaller than high pressure threshold (S S P_HD ), (Ii) low voltage value (P) ND ) Greater than the low pressure threshold (S S P_ND ), And / or (iii) high voltage value (P) HD ) And low voltage value (P ND The difference (Δ于) is less than the pressure differential threshold (S ΔP ), And, d) After the limited time period (T) passes, when the high voltage value (P HD ) And / or low voltage value (p ND ) The end of the starting phase is still met when the conditions (i) to (III) are still met.

Description

technical field [0001] The invention relates to a method for operating a refrigerant circuit for a vehicle air-conditioning system, the refrigerant circuit having a refrigerant compressor which can be adjusted by means of an actuation signal to regulate the compressor output ; a condenser or a gas cooler; an evaporator with an associated expansion mechanism; and at least one pressure sensor device for measuring the pressure of the refrigerant on the high-pressure side and / or the low-pressure side of the refrigerant circuit. Furthermore, the invention relates to a vehicle air-conditioning system having a refrigerant circuit for carrying out the method according to the invention. Background technique [0002] Depending on the vehicle drive concept, a vehicle air-conditioning system with a refrigerant circuit for cooling system operation and possibly also a heat pump function can be equipped with a mechanical or electrical refrigerant compressor. [0003] The mechanical refrig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02
CPCF25B49/022F25B2500/222F25B2500/24F25B2500/26F25B2600/01F25B2600/0253F25B2700/1931F25B2700/1933F25B2700/195F25B2700/2106F25B2700/21151F25B2700/21152F25B2700/21163B60H1/00007B60H1/00428B60H1/0045B60H1/00899B60H1/22B60H1/3208B60H1/3222B60H2001/3238
Inventor D·施罗德C·雷宾格尔H·罗腾科尔布J·瓦克
Owner AUDI AG