Heat pump water heater with external inlet tube
a technology of heat pump and water heater, which is applied in the direction of heat pump, compression machine with reversible cycle, refrigerating machine, etc., can solve the problems that the design of water heater tanks developed for electric water heaters is not particularly efficient for heat pump water heaters, and achieves the effect of increasing the temperature range and enhancing the thermodynamic cycle efficiency of the system
Inactive Publication Date: 2012-03-15
GENERAL ELECTRIC CO
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Benefits of technology
"The invention is a heat pump water heater system with a sealed heat pump cycle that includes a compressor, condenser / gas cooler, evaporator, and refrigerant. The system includes a water storage tank with an outlet for hot water and an inlet for cold water. The condenser / gas cooler is in heat exchange relationship with the tank for heating the water within it. The tank may have an inlet pipe connected to the cold water inlet, and a cold water discharge pipe connected to the cold water inlet. The system may also have a supplemental heat source, such as electric resistive heating elements within the tank. The tank apparatus may also have an outlet for hot water and outlets for cold water along its length. The technical effects of the invention include improved thermodynamic cycle efficiency, increased temperature range over which heat is rejected, and better utilization of the refrigerant."
Problems solved by technology
Water heater tank designs developed for electric water heaters are, however, not particularly efficient for heat pump water heaters.
Method used
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[0022]Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.
[0023]Referring now to the figures, FIG. 1 depicts a heat pump water heater (HPWH) system 100 that includes an evaporator 102, a compressor 130, a condenser 108, a throttling device 106, and at least one fan 104. The condenser 108 is assembled in a heat exc...
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A heat pump water heater system includes a water storage tank and a sealed heat pump cycle with a compressor, a condenser or gas cooler, an evaporator, and a refrigerant. The condenser / gas cooler is disposed in a heat exchange relationship with at least a portion of the water storage tank for heating water within the tank. The tank includes an outlet through which hot water is discharged, and a cold water inlet that is disposed so as to introduce cold water into the tank at a location of a bottommost portion of the condenser / gas cooler. The cold water introduced into the tank is not pre-heated by hot water in the tank so as to establish a thermodynamically efficient temperature differential between the cold water and hot water in the tank.
Description
FIELD OF THE INVENTION[0001]The present subject matter relates generally to water heaters, and more particularly to a heat pump water heater with an improved inlet tube design.BACKGROUND OF THE INVENTION[0002]Conventional electric resistance water heaters include a tank defining a chamber for retention of water. A water inlet pipe connects to a cold water supply line and relatively cold water into the chamber. Typically, the inlet pipe (“dip tube”) extends internally from the top of the tank to a location adjacent to the bottom of the tank. Within the tank, electric resistance elements (typically two) heat the water, which is dispensed from an outlet pipe located adjacent to the top of the tank. As hot water is dispensed, cold water is introduced into the bottom of the tank. As the water is heated, in rises in the tank.[0003]Heat pump water heaters are gaining broader acceptance as a more economic and ecologically-friendly alternative to electric water heaters. These systems utilize...
Claims
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IPC IPC(8): F25B13/00
CPCF24H4/04F25B2339/046F25B30/02
Inventor CROSBY, JONATHAN CHARLESROETKER, JOHN JOSEPH
Owner GENERAL ELECTRIC CO