Dehumidification system

The dehumidification system stabilizes dew point temperatures in low-dew-point rooms by using historical weather data to adjust regeneration heater temperature and airflow, addressing fluctuations caused by weather conditions.

JP7868715B1Active Publication Date: 2026-06-02SANKI ENG CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
SANKI ENG CO LTD
Filing Date
2025-02-17
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing dehumidification systems fail to stably control dew point temperatures in low-dew-point rooms due to fluctuations caused by varying weather conditions, leading to unstable dew point temperatures in the dehumidified air.

Method used

A dehumidification system that includes a dehumidifier with a dehumidifying rotor, a regeneration heater, and a control device using historical weather data to estimate outside air dew point temperature and adjust regeneration heater temperature, airflow of fans, and dehumidifying rotor speed to stabilize dew point temperatures.

Benefits of technology

Stabilizes dew point temperatures in low-dew-point rooms by accurately adjusting regeneration heater temperature and airflow based on weather data, ensuring consistent dew point control and reducing power consumption.

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Abstract

This invention provides a dehumidification system that can stably control the dew point in a low-dew-point room based on weather conditions. [Solution] The dehumidification system estimates the outside air dew point temperature for a predetermined past date and time corresponding to the current date and time, based on past weather data. The dehumidification system also estimates the supply air inlet temperature, which indicates the temperature at the inlet of the supply air area, and the supply air inlet absolute humidity, which indicates the absolute humidity at the inlet of the supply air area, based on the inlet conditions of the supply air area. Then, the dehumidification system calculates the regeneration inlet target temperature, which indicates the target temperature at the inlet of the regeneration area, based on the outside air dew point temperature, the supply air inlet temperature, and the supply air inlet absolute humidity. After calculating the regeneration inlet target temperature, the dehumidification system performs at least one of the following actions to bring the temperature of the regeneration heater closer to the regeneration inlet target temperature: temperature control of the regeneration heater, airflow control of the first fan installed on the inlet side of the supply air area in the first duct, and airflow control of the second fan installed on the outlet side of the regeneration area in the second duct.
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