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.

What is claimed is: 
     
         1 . A thermoelectric dehumidifying device, comprising:
 a case, which has a first lateral surface and a second lateral surface, wherein the first lateral surface and the second lateral surface are separated by a first spacing; a horizontal length of the first lateral surface and a horizontal length of the second lateral surface are both greater than the first spacing;   a thermoelectric element, which is provided between the first lateral surface and the second lateral surface, and divides a space between the first lateral surface and the second lateral surface into an upper air passage and a lower air passage, wherein an end of the upper air passage communicates with an end of the lower air passage; the thermoelectric element has a cold surface and a hot surface, wherein the cold surface is located in the lower air passage, and the hot surface is located in the upper air passage;   a first air inlet, which is provided on the case, and communicates with another end of the lower air passage;   a second air inlet, which is provided on the case, and communicates with the end of the upper air passage;   an air outlet, which is provided on the case, and communicates with another end of the upper air passage;   a condenser comprising a plurality of condensing fins, which are provided in the lower air passage, and are arranged substantially parallel to the first lateral surface in a spaced manner, wherein each of the condensing fins has a top side connected to the cold surface, and a bottom side far away from the cold surface; the bottom side of each of the condensing fins is a free side, and is inclined downward in a direction away from the first air inlet;   a heatsink comprising a plurality of heat dissipation fins, which are provided in the upper air passage, and are arranged substantially parallel to the first lateral surface in a spaced manner; wherein a bottom side of each of the heat dissipation fins is connected to the hot surface; and   a fan, which is fixedly provided in the upper air passage, and is located between the second air inlet and the heatsink.   
     
     
         2 . The thermoelectric dehumidifying device of  claim 1 , wherein the condensing fins comprise a plurality of long condensing fins and a plurality of short condensing fins, which are provided in a staggered manner, and any two adjacent ones of the long condensing fins and the short condensing fins are spaced by a fin spacing. 
     
     
         3 . The thermoelectric dehumidifying device of  claim 2 , wherein the fin spacing is between 1.5 and 3.5 mm. 
     
     
         4 . The thermoelectric dehumidifying device of  claim 2 , wherein a height difference between a bottom side of each of the long condensing fins and a bottom side of each of the short condensing fin is between 2 and 4 mm. 
     
     
         5 . The thermoelectric dehumidifying device of  claim 1 , wherein the case further comprises a third lateral surface and a fourth lateral surface, which are provided correspondingly; the third lateral surface and the fourth lateral surface are both respectively connected to the first lateral surface and the second lateral surface; the first air inlet and the air outlet are provided on the third lateral surface of the case. 
     
     
         6 . The thermoelectric dehumidifying device of  claim 5 , wherein the second air inlet are provided on the fourth lateral surface of the case. 
     
     
         7 . The thermoelectric dehumidifying device of  claim 1 , wherein the case further comprises a connecting air passage, which is a hollow passage with two open ends; the two open ends of the connecting air passage are respectively connected to the end of the upper air passage and the end of the lower air passage, so that the upper air passage communicates with the lower air passage through the connecting air passage. 
     
     
         8 . The thermoelectric dehumidifying device of  claim 7 , wherein the case further comprises a plurality of first deflectors, which are provided along a wall of the connecting air passage. 
     
     
         9 . The thermoelectric dehumidifying device of  claim 1 , wherein the case further comprises a second deflector, which is provided between the first air inlet and the lower air passage, and communicates the first air inlet and the lower air passage. 
     
     
         10 . The thermoelectric dehumidifying device of  claim 1 , wherein the case further comprises a third deflector, which is provided between the air outlet and the upper air passage, and communicates the air outlet and the upper air passage. 
     
     
         11 . The thermoelectric dehumidifying device of  claim 1 , wherein a cross-sectional area of an airflow created by the fan is substantially equal to a cross-sectional area of all of the heat dissipation fins which are arranged substantially in parallel to each other.