Thermoelectric dehumidifying device

Abstract

A thermoelectric dehumidifying device includes a case, on which a first air inlet, a second air inlet, and an air outlet are provided, and in which a thermoelectric element, a condenser, a heatsink, and a fan are provided. The thermoelectric element has a cold surface, to which the condenser is connected, and a hot surface, to which the heatsink is connected. The fan is provided between the second air inlet and the heatsink. Airflow flowing through the condenser will be cooled and dehumidified. Each fin of the condenser has a downwardly inclined bottom side, which facilitates the dripping of the water droplets condensed thereon. Said airflow will be mixed with external airflow drawn in through the second air inlet, and then blown by the fan to flow through fins of the heatsink, bringing away heat effectively and therefore improving the dehumidifying efficiency of the device.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]The present invention relates generally to a thermoelectric dehumidifying device, and more particularly to a slim type thermoelectric dehumidifying device which has higher dehumidifying efficiency compared to conventional thermoelectric dehumidifying devices.2. Description of the Prior Art[0002]A conventional dehumidifier typically uses a gas compressor to circulate refrigerant in tube passes involving a condenser and an evaporator. Due to the change in pressure, the refrigerant circulating in tube passes undergoes phase transitions between a liquid state and a gaseous state. Specifically, at the evaporator section, the refrigerant changes from a liquid state to a gaseous state through evaporation. By absorbing the heat contained within, the evaporation of the refrigerant cools the surrounding air which is drawn into the dehumidifier and flows by the outside of the tube passes. As the air temperature decreases, the moisture i...

AI Technical Summary

Benefits of technology

The present invention provides a thermoelectric dehumidifying device with improved efficiency in dehumidification. The device is slim and adapted to be placed in a cramped space. The fan is positioned to improve heat dissipation, allowing the temperature at the cold surface to be maintained. The bottom of each condensing fin is inclined downward in line with the flowing direction of the airflow, and the bottoms of adjacent condensing fins are not at the same height, accelerating the sliding and dropping of water droplets and improving the efficiency of the device. The device is designed to provide improved dehumidification for the airflow which enters the device.

Problems solved by technology

However, this kind of dehumidifiers is usually bulky since it has to accommodate at least a gas compressor, a condenser, and an evaporator within, and therefore is not suitable for cramped usage environments such as in wardrobes, closets, or shoe cabinets.

Due to this reason, when the cold surface and the hot surface have a great temperature difference in between, the cold surface may not be able to be further cooled since only limited heat energy can be transferred to the hot surface.

As a result, the cold surface naturally has a poorer performance in condensing moisture.

However, when such mixed airflow passes by the hot surface, only the heat energy at locations on the hot surface having contact with the cross-section of the mixed airflow can be taken away, so that the heat dissipation effect of the hot surface is still rather limited.

If the heat dissipation effect of the hot surface is limited, so is the cooling effect of the cold surface of the thermoelectric cooling module, leading to a poor moisture-condensing performance on the cold surface, which hinders the dehumidifying efficiency.

However, those water droplets prevent the airflow from contacting the portions of the fins which are directly covered by the droplets, which hinders the cooling of the airflow, and therefore interferes with the water droplet from further condensing on the fins 23.

As a result, the dehumidifying efficiency of the airflow drawn into the dehumidifier is still not satisfying.

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