Liquid heaters and vaporizers – Compartment
Reexamination Certificate
2000-02-11
2001-02-27
Wilson, Gregory (Department: 3749)
Liquid heaters and vaporizers
Compartment
C122S014200
Reexamination Certificate
active
06192836
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to a separate type water heater, more particularly to a water heater in which a burning device and a control device are separately disposed in separate housings and are connected via piping so that, in use, the control device is disposed indoors whereas the burning device is installed outdoors to permit easy operation and prevent possible accidents due to generation of carbon monoxide.
(b) Description of the Prior Art
A conventional water heater is provided with a housing with piping and cock disposed therein to connect to a gas source. The cock is connected to an ignition unit, which has a burner provided thereon. The burner has a water tank disposed thereon. A coiled pipe is disposed to surround the surface of the water tank. Two ends of the coiled pipe are respectively connected to cold and hot water pipes. The water tank further has a heat exchanger disposed thereon. The heat exchange is provided with a discharge port. The burner is ignited by means of the ignition unit to heat the water in the coiled pipe of the water tank. The waste gas after gas burning is discharged via the discharge port. However, since all the components of the conventional water heat are disposed in the same housing, if the user installed the water heater indoors for facilitation of use during winter times, carbon monoxide generated during gas burning may stay indoors and may cause fatal accidents. If the water heater is installed outdoors, although the problem of carbon monoxide intoxication may be eliminated, use is not convenient. Furthermore, in the conventional water heater, since the waste gas is discharged to the ceiling, it will stain the ceiling, and the discharge is not smooth.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide a separate type water heater including two independent first and second housings. The first and second housings respectively have a burning device and a control device that are originally installed together. The components of the devices are connected via piping so that, in use, the first housing provided with the burning device may be installed outdoors, while the second housing with the control device may be installed in a place where the user can easily access, such as the kitchen. Hence, the user can operate the control device indoors to obtain the required hot water. Since the burning device is installed outdoors, possible accidents caused by carbon monoxide can be avoided to ensure the user's safety and properties.
Another object of the present invention is to provide a separate type water heater in which a first housing is provided with a discharge hood having two guide ducts extending from both sides thereof such that waste gas generated after gas combustion can flow to the discharge hood for discharge to the outside via the guide ducts, thereby eliminating the problem of direct waste gas discharge to the ceiling as in the prior art, and facilitating discharge of waste gas.
A further object of the present invention is to provide a separate type water heater in which a second housing has both sides respectively provided with more than one set of connecting pipes of stainless steel whereby, in use, the connecting pipes on any one side of the second housing may be connected to the components of a burning device of a first housing as desired by the user.
REFERENCES:
patent: 4568821 (1986-02-01), Boe
patent: 4785792 (1988-11-01), Saint Laurent
patent: 5571007 (1996-11-01), Ishiguro et al.
Bacon & Thomas PLLC
Wilson Gregory
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