Heat exchange type ventilation device

The system uses temperature monitoring to detect and correct damper malfunctions, ensuring correct internal air circulation and preventing freezing in heat exchange ventilation systems.

WO2026140715A1PCT designated stage Publication Date: 2026-07-02PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Filing Date
2025-12-02
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing heat exchange ventilation systems face issues with internal air circulation failure due to damper malfunctions, leading to potential freezing and inefficiencies, especially in internal air circulation mode.

Method used

The system incorporates a control unit that monitors outside and return air temperatures to detect damper malfunctions by comparing the temperature differences, allowing for accurate determination of internal air circulation status and automatically correcting or switching modes to prevent freezing and maintain functionality.

Benefits of technology

Ensures correct internal air circulation by detecting and addressing damper malfunctions, preventing freezing of the heat exchange element and maintaining system efficiency by suppressing outside air intake during internal circulation mode.

✦ Generated by Eureka AI based on patent content.

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Abstract

An outside air sensor 60 measures the outside air temperature in an outside air chamber 22, and outputs the measured outside air temperature to a control unit 70. A return air sensor 62 measures the return air temperature of the return air sensor 62, and outputs the measured return air temperature to the control unit 70. In a heat-exchange ventilation mode, the control unit 70 opens an outside air damper 40 and an exhaust damper 42 and closes a central damper 44. In an internal circulation mode, the control unit 70 closes the outside air damper 40 and the exhaust damper 42 and opens the central damper 44. In the internal circulation mode, the control unit 70 detects an abnormality or failure in any of the outside air damper 40, the exhaust damper 42, and the central damper 44 on the basis of the outside air temperature and the return air temperature.
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