Methods for controlling air conditioning and / or heating systems

The method uses a refrigerant circulation loop with a pre-created map to quickly select and adjust dehumidification modes in vehicles, addressing thermal inertia issues and improving comfort by efficiently controlling humidity and temperature.

JP7877442B2Inactive Publication Date: 2026-06-22VALEO SYST THERMIQUES SAS
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
VALEO SYST THERMIQUES SAS
Filing Date
2022-07-26
Publication Date
2026-06-22
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Conventional air conditioning and heating systems in vehicles, particularly in hybrid or electric vehicles, face challenges in quickly achieving a comfortable cabin temperature due to thermal inertia and iterative adjustments, leading to passenger discomfort and inefficient humidity control.

Method used

A method for controlling the air conditioning and heating system using a refrigerant circulation loop with multiple heat exchangers and a pre-created map of humidity control parameters to select an appropriate dehumidification mode based on actual and set temperatures, airflow rates, and ambient conditions, allowing for rapid mode selection and transition.

Benefits of technology

The method enables faster achievement of desired cabin temperature and humidity levels, reducing passenger discomfort and computational requirements compared to traditional systems.

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Abstract

The invention relates to a method for controlling a system for air conditioning and / or heating of an interior air flow (FAI) intended to be sent to the passenger compartment of a vehicle, the system comprising a loop (100) for the circulation of a refrigerant (FR), the loop comprising a first heat exchanger (120) between the refrigerant (FR) and the interior air flow (FAI) for cooling said air flow and a second heat exchanger (140) between the refrigerant (FR) and said interior air flow or a heat transfer fluid (FC) for heating said interior air flow, located downstream of the first heat exchanger (120) in the circulation direction of the interior air flow (FAI). The method comprises at least one step (30) of selecting a mode for dehumidifying the interior air flow (FAI) from a plurality of dehumidification modes, said selection step (30) being performed on the basis of a pre-created map of at least three parameters of the system, referred to as humidity control parameters, selected from the actual temperature of the interior air flow (FAI) upstream of the first heat exchanger (120) (Tair_Hvac_in), the temperature setpoint downstream of the second heat exchanger (140) (Tinnercd_sp), the temperature setpoint downstream of the first heat exchanger (120) (Tevap_sp), the flow rate of the interior air flow through the first exchanger (Q), the ambient temperature of the air (Tamb) and / or the humidity of the air (Hair).
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Citation Information

Patent Citations

  • JP2016064704A

  • JP2018202896A