Patent · US Active

Method for controlling the refrigerant pressure in an ambient heat exchanger of a refrigerant circuit

US9821632B2 · kind B2 · utility

0Cited by

4References

4Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Stefan Wiedemann · Munich, DE
Oliver Horn · Munich, DE
Martin Knott · Balderstone, GB

Key dates

Filing date	Apr 21, 2015
Grant date	Nov 21, 2017
Priority date	—
Expiry date	Aug 15, 2035

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60H2001/3285
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A method of controlling the refrigerant pressure in an ambient heat exchanger of a refrigerant circuit, particularly a heat pump circuit, for vehicles, in which the current temperature and the current humidity of the ambient air is measured, the current dew point temperature of the ambient air is determined from the measured temperature and humidity, and if the ambient air temperature is below 0° C. the refrigerant pressure in the refrigerant circuit is controlled by adjusting the rotational speed of a refrigerant compressor of the refrigerant circuit, the flow cross-section of a controllable expansion element of the refrigerant circuit and/or the ambient air volume flow flowing around or through the ambient heat exchanger, such that the temperature of the ambient heat exchanger is greater than the dew point temperature.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.