Water filtering type air cleaning unit

A water filtering type air cleaning unit includes a housing having an upper side defining an air draining conduit and a lower side defining an air inlet conduit, a water permeable air filtering device mounted in the air draining conduit and including a plurality of stacked air filtering pipes, a water permeable disk mounted on a top edge of the water permeable air filtering device, a cold water heat exchanging device mounted in the air inlet conduit and including a cold water inlet and a cold water outlet connected with the water permeable disk, a water pump mounted in the air inlet conduit and connected with the cold water inlet, a water tank mounted in the air inlet conduit and connected with the water permeable air filtering device and the water pump, a natural convention device mounted in the housing and including a plurality of closed circulating pipes each filled with a refrigerant, and a vent mounted in the housing and including an upper side formed with an air outlet and an air inlet.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to an air cleaning unit, and more 
particularly to a water filtering type air cleaning unit. 
2. Description of the Related Prior Art 
Waste or dirty air will be drained from a room or an operating space such 
as a chemical factory and the like into surroundings by means of the 
operation of air conditioning equipments. Therefore, it is necessary to 
prevent waste air from being exhausted into surroundings. The present 
invention has arisen to solve the above-described problem. 
SUMMARY OF THE INVENTION 
The primary objective of the present invention is to provide water 
filtering type air cleaning unit functioning to clean air and to save 
energy consumption. 
In accordance with one aspect of the present invention, there is provided a 
water filtering type air cleaning unit comprising a housing including an 
upper side defining an air draining conduit and a lower side defining an 
air inlet conduit, a water permeable air filtering device mounted in the 
air draining conduit and including a plurality of stacked air filtering 
pipes, a water permeable disk mounted on a top edge of the water permeable 
air filtering device, a cold water heat exchanging device mounted in the 
air inlet conduit and including a cold water inlet and a cold water outlet 
connected with the water permeable disk, a water pump mounted in the air 
inlet conduit and connected with the cold water inlet, a water tank 
mounted in the air inlet conduit and connected with the water permeable 
air filtering device and the water pump, a natural convention device 
mounted in the housing and including a plurality of closed circulating 
pipes each filled with a refrigerant, and a vent mounted in the housing 
and including an upper side formed with an air outlet. 
Further objectives and advantages of the present invention will become 
apparent after a careful reading of the detailed description with 
appropriate reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Referring now to FIGS. 1--3, a water filtering type air cleaning unit in 
accordance with the present invention comprises a housing 10 including an 
upper side defining an air draining conduit 101, a lower side defining an 
air inlet conduit 102, and a baffle 104 mounted between the air draining 
conduit 101 and the air inlet conduit 102. 
A water permeable air filtering device 11 is mounted in the air draining 
conduit 101 and includes a plurality of stacked air filtering pipes 112 
each of which is made of a tubular filtering material defining a plurality 
of pores 114. A water permeable disk 18 is mounted on a top edge of the 
water permeable air filtering device 11 and defines a plurality of small 
apertures 181 such that water can be evenly distributed through each of 
the small apertures 181 and is easy to evaporate. A basin 17 is mounted on 
a bottom portion of the water permeable air filtering device 11. 
A cold water heat exchanging device 16 is mounted in the air inlet conduit 
102 and includes a cold water inlet 161, a cold water outlet 162 connected 
with the water permeable disk 18, and a heat exchanging pipe row 160 
located between the cold water inlet 161 and the cold water outlet 162. A 
connecting pipe 182 is connected between the water permeable disk 18 and 
the cold water outlet 162. A water pump 14 is mounted in the air inlet 
conduit 102 and connected with the cold water inlet 161 for pumping water 
into the water permeable disk 18. A connecting pipe 164 is connected 
between the cold water inlet 161 and the water pump 14. A water tank 13 is 
mounted in the air inlet conduit 102, connected with the water permeable 
air filtering device 11 and the water pump 14 and includes a water inlet 
pipe 132, a water outlet pipe 133 and a float ball 131 for controlling an 
amount of water in the water tank 13. A connecting pipe 136 is connected 
between the water permeable air filtering device 11 and the water tank 13, 
and a connecting pipe 138 is connected between the water pump 14 and the 
water tank 13. 
A natural convention device 12 is mounted in the housing 10 and includes a 
plurality of closed circulating pipes 120 each mounted with a plurality of 
fins 121 and each filled with a refrigerant which is easy to evaporate and 
condense. A vent 15 is mounted in the housing 10 and includes an upper 
side formed with an air outlet 150 and a lower side formed with an air 
inlet 152. 
In operation, dirty air in the room 50 (or operation space) can be drawn 
into the water permeable air filtering device 11 via the air draining 
conduit 101. Water 60 can flow from the water permeable disk 18 into the 
air filtering pipes 112 via the apertures 181 and into the pores 114 of 
each of the air filtering pipes 112, thereby forming a compact effect such 
that the impurities contained in the air can be captured on the air 
filtering pipes 112 and can be carried by the water 60 to be deposited on 
the basin 17. In addition, the evaporation effect of the water 60 on the 
water permeable air filtering device 11 makes the water 60 absorb heat in 
the air so as to evaporate into vapor 62 such that the temperature of the 
water 60 can be reduced, thereby providing a function for decreasing the 
temperature of the air. 
The fresh air after being filtered can be drawn into the natural convention 
device 12. Each of the circulating pipes 120 is filled with a refrigerant 
which is easy to evaporate and condense, wherein the numeral 122 
represents the refrigerant in a liquid state and the numeral 124 
represents the refrigerant in a vapor state. The refrigerant located in 
the upper portion of the natural convention device 12 will condense as 
shown by numeral 126 in FIG. 3A due to the heat exchanging effect of 
emitting heat such that the air passing through the upper portion of the 
natural convention device 12 will absorb heat so as to increase its 
temperature. Therefore, the air drained from the room 50 can be cleaned, 
the cold energy can be recovered, the temperature of the air can be 
increased, and energy can be saved. 
The air in the outer surroundings 52 can be drawn into the lower portion of 
the natural convention device 12 via the air inlet conduit 102. The lower 
portion of the natural convention device 12 corresponds to the upper 
portion so as to form a circulating effect such that the air entering the 
lower portion of the natural convention device 12 from the outer 
surroundings 52 will emit heat due to the heat exchanging action of the 
natural convention device 12, thereby decreasing the temperature of the 
air. The air can then pass through the cold water heat exchanging device 
16 where the air will emit heat so as to further decrease its temperature. 
The water flows through the water permeable air filtering device 11 from 
the water permeable disk 18 can be received by the basin 17 which can 
supply the water into the water tank 13 via the connecting pipe 136. The 
water inlet pipe 132 of the water tank 13 can be used to supply the water 
during the circulating process, and the water outlet pipe 133 can be used 
to drain impurities and excessive circulating water. The water pump 14 can 
be used to pump water in the water tank 13 into the cold water inlet 161 
via the connecting pipe 164, and the water can then be pumped from the 
cold water outlet 162 into the water permeable disk 18 via the connecting 
pipe 182, and finally flows through the water permeable air filtering 
device 11 into the water tank 13, thereby accomplishing the circulating 
process. 
Referring to FIG. 4, a sterilizing device 19 is mounted between the cold 
water inlet 161 and the water pump 14 for providing the sterilizing 
purpose. 
Referring to FIG. 5, a second water permeable air filtering device 111 is 
mounted between the lower portion of the natural convention device 12 and 
the vent 15 and includes a plurality of stacked second air filtering pipes 
116, a second water permeable disk 180 is mounted on a top edge of the 
second water permeable air filtering device 111, a connecting pipe 166 is 
connected between the second water permeable disk 180 and the cold water 
heat exchanging device 16, a second basin 171 is mounted on a bottom 
portion of the second water permeable air filtering device 111, and a 
connecting pipe 138 is connected between the basin 171 and the water tank 
13. 
Referring to FIG. 6, a second water tank 134 is connected with the basin 
171 of the second water permeable air filtering device 111 via a 
connecting pipe 135, and is connected with a second water pump 141 which 
is connected with the second water permeable disk 180 via a connecting 
pipe 139. 
The above-mentioned embodiments can be used to supply cold air to the room 
50. Referring now to FIG. 7, when it is intended to supply warm air into 
the room 50, the moving direction of the air is reverse to that as shown 
in FIG. 1. The operation thereof is similar to that as shown in FIG. 1, 
and will not be further described. 
Although the present invention has been described with a certain degree of 
particularity, it is to be understood that the present disclosure has been 
made by way of example only and that many other possible modifications and 
variations can be made without departing from the scope and spirit of the 
present invention.