Abstract:
A vent apparatus is used to install a tankless water heater or similar equipment inside an attic without going onto the roof. The vent apparatus may include a main housing and an umbrella assembly movably disposed therein. The main housing (e.g., PVC pipe) is installed through the roof. The umbrella assembly may have a central rod with a flexible umbrella cover on top. The umbrella assembly is pushed up through the main housing until the umbrella cover exits the top of the main housing to cover it and prevent rain from entering the main housing. The bottom of the main housing is then connected to the tankless water heater. Additional embodiments are disclosed for tankless water heaters and other equipment with an air intake port and a gas exhaust port.
Abstract:
A gas distribution unit includes a main flow passage and a plurality of distribution flow passages that branch from the main flow passage and supplies a fuel gas to each of groups of a plurality of nozzles. A main body includes a main depressed portion that forms the main flow passage, a plurality of depressed portions that form the respective distribution flow passages, and fuel gas inlets provided at upstream ends of the respective depressed portions and communicated with the main depressed portion. Among the inlets, the inlet of the depressed portion corresponding to the group including the largest number of the nozzles is formed to have a diameter larger than diameters of the inlets of the other depressed portions, and the inlet having the large diameter is formed to have a thickness in a center axis direction smaller than thicknesses of the inlets of the other depressed portions.
Abstract:
A fluid heater for heating fluid moving along a fluid path between a fluid inlet and a fluid outlet. The fluid heater comprises a fluid preheating assembly configured to directly heat fluid moving along the fluid path, a fluid holding tank for receiving preheated fluid moving along the fluid path from the fluid preheating assembly, a primary fluid pump configured to pump fluid along the fluid path, and a primary fluid heating assembly configured to indirectly heat fluid moving along the fluid path from the fluid holding tank. Fuel is combusted in the primary fluid assembly and an exhaust gas movement path is defined to guide the exhaust gas from the primary fluid heating assembly through the fluid holding tank to the fluid preheating assembly.
Abstract:
A gas hot water heating device and a system with heating function are disclosed. The device includes a combustion device (1), an inlet (E) and an outlet (G) of a hot water pipeline (2), an inlet (I) and an outlet (H) of a heating loop (3), and a water tank (4). The device also includes a first heat exchanger (5), a second heat exchanger (6) and a third heat exchanger (7). A flue gas outlet (1-2) of the combustion device (1) is connected with flue gas passages of the first heat exchanger (5) and the second heat exchanger (6) in order and in series. A first water flow passage (5-1) and a second water flow passage (5-2) are arranged in the first heat exchanger (5), and the water tank (4) and the first water flow passage (5-1) of the first heat exchanger (5) are communicated between the inlet (E) and the outlet (G) of the hot water pipeline (2) in series. The second heat exchanger (6) and the third heat exchanger (7) can exchange heat with water in the water tank (4).
Abstract:
A compact, on-demand system to produce high pressure (≦5,000 psig) and high temperature (≦450° C.) water or other liquids which maintains single-phase flow throughout the system utilizing low-cost, thick-wall tubing and thereby negate the requirement to design the unit as a boiler or adhere to coded pressure vessel design requirements. This design can also replace a conventional boiler for the generation of hot water as well as low and high pressure steam.
Abstract:
A fluid heating apparatus for heating fluid on a fluid path may comprise a fluid pump, a fluid heater, a temperature sensor to sense fluid temperature and generate a temperature signal, and a temperature control assembly configured to control the temperature of the fluid. The control assembly may comprise a target temperature input to receive a target temperature, a pump control to control operation of the fluid pump to control a flow rate of the fluid, and a heater control to control operation of the fluid heater to control a degree of heat output by the fluid heater. The temperature control assembly may be configured to increase and decrease fluid flow along the fluid path and to increase and decrease heat output of the fluid heater to control the temperature of the fluid at the fluid outlet.
Abstract:
A thermostatic condensing gas water heater, comprising a burner; a first heat exchanger (7), a second heat exchanger (4), a water inlet pipe (10), and a water outlet pipe (9) provided in succession along the flow direction of the burnt flue gas; a controller; and a water flow channel connecting the first heat exchanger (7) and the second heat exchanger (4) in parallel between the water inlet pipe (10) and the water outlet pipe (9), wherein flow control valves (3, 5) capable of adjusting the water flow distribution of the first heat exchanger (7) and the second heat exchanger (4) are provided on the water flow channel and controlled by the controller.
Abstract:
A direct contact water heating system employs a vertical water tower having a sidewall with a combustion inlet opening spaced above the tower lower end. A generally horizontal combustion chamber has a sidewall in communication with the tower combustion inlet and an end wall spaced from the water tower. A burner has a combustion outlet in communication with an opening in the end wall, the combustion chamber end wall having an annular area surrounding the burner combustion outlet. Products of combustion flow from the burner, through the combustion chamber into the water tower through the combustion inlet opening. A shell has an inner end attached to the water tower sidewall. A sidewall portion of the shell surrounds the combustion chamber sidewall and an annular portion is spaced exteriorly of the annular area of the combustion chamber end wall. An interior surface of the outer shell and an exterior surface of the combustion chamber form a closed envelope having a water inlet and a water outlet. A flow system passes water through the closed envelope to cool the combustion chamber. In a preferred embodiment the combustion chamber end wall and the shell annular portion are both frustums to provide more rigid support of the burner.
Abstract:
The water heating apparatus is formed by a container having spaced upper and lower walls and a cylindrical side wall having upper and lower portions extending between the upper and lower walls defining an interior of the container. An inlet opening is formed through the central portion of the upper wall. An elongated hollow flame tube is located within the interior of the container and has an upper end coupled to the inlet opening of the upper wall and extends downward. A combustion device is coupled to the inlet opening of the upper wall for directing a flame into the flame tube by way of the upper opening. A plurality of water nozzles coupled together at spaced apart positions by conduits are located in the upper portion of the interior of said container below the upper wall and at spaced apart positions around the upper portion of the flame tube for directing water against the flame tube for cooling purposes and downward into the zone between the flame tube and the side wall for forming hot water for flow into the lower portion of the interior of the container. An exhaust opening for an exhaust device is formed through the upper wall. The upper wall is removably coupled to the upper end of the side wall. The upper and lower portions of the side wall are removably coupled together.
Abstract:
A dual direct contact water heater is described and consists of a heater housing having two sections, each section having a water reservoir. One section provides hot water at a high temperature and provides a source of heat exchange to heat an external source of water for commercial use. A burner is provided in the first section to provide the heat source to a packing through which water percolates. The source of water for the first section is the outlet of a heat exchanger whereby water from the reservoir is recirculated in a closed circuit in the first section. Hot gases rising from the first section is directed to a second section which also includes a second packing and a reservoir and it also has a closed loop whereby a second source of hot water, at a lower temperature, is utilized in a closed loop and in heat exchange with a second external source to produce domestic hot water or without heat exchanger to produce hot water for various processes. The fumes at the exhaust port of the second section are cooled considerably whereby the total efficiency of the water heater is greatly increased.