Patent Application
20110262119
1. Field of the Invention
The present invention relates to a steam generating device, and more particularly, to a steam generating device having a pre-heat tube to increase the efficiency for generating steam.
2. Description of the Prior Art
A conventional steam generating device is cooperated with a water tank from which water is pumped into the steam generating device and heated to generate steam. The steam is ejected from an outlet to clean stains or kill germs or even to iron wrinkles of fabrics.
The conventional steam generating device is shown in
However, the length of the body 60 is limited so as to be installed into the casing of the appliance so that the time that the water in the waterway is too short to be heated to become steam. What ejected from the outlet 63 is a mixture of water and steam, and the mixture containing too much water and has lower temperature than expected.
The present invention intends to provide a steam generating device which includes a pre-heat tube such that water is pre-heated before entering into the waterway and the steam ejected from the outlet contains less water and has high temperature.
The present invention relates to a steam generating device that comprises a body having a waterway defined longitudinally therein. An inlet and an outlet are respectively connected to two ends of the body and communicate with the waterway. A heating tube is connected to the body and located close to the waterway. A pre-heat tube is connected to the body and located close to the heating tube. The pre-heat tube includes a first end and a second end, wherein the first end introduces cold water into the pre-heat tube and the second end is connected to the inlet so as to deliver the pre-heated water into the waterway.
The primary object of the present invention is to provide a steam generating device that generates steam containing less water and has high temperature by suing a pre-heat tube.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
Referring to
The body 60 has a recess 32 defined in an outside 30 thereof and the recess 32 is located close to the heating tube 70. The pre-heat tube 10 is received in the recess 32. The pre-heat tube 10 includes a U-shaped tubular body 11 which has the first end 12 and the second end 13. The first end 12 introduces cold water into the pre-heat tube 10 and the second end 13 is connected to the inlet 62 to the body 60. The connection tube 20 includes a first connection end 21 and a second connection end 23, the first connection end 21 is connected to the inlet 62 of the body 60 and the second connection end 23 is connected to the second end 13 of the pre-heat tube 10.
The cold water is introduced into the pre-heat tube 10 via the first end 12 of the pre-heat tube 10 and the water in the pre-heat tube 10 is pre-heated by the heating tube 70. The pre-heated water then flows into the waterway 61 via the connection tube 20 and the inlet 62. Because the water entering the waterway 61 is pre-heated, so that the temperature of the pre-heated water can be easily raised and transferred into steam. In other words, the travel distance of the water is increased while the size of the body 60 does not change too much, and the efficiency is increased.
The pre-heat tube 10 is received in the recess 32 in the outside 30 of the body 60 so that the size of the body 60 does not need to change too much and can still be installed in the appliances. The travel distance of the water is increased and the time for absorbing the heat is increased so that the water can be transferred into steam efficiently. The casing 42 encloses the pre-heat tube 10 and the body 60 to reduce heat loss during operation.
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
