Water heating system

Patent · Tue Nov 13 00:00:00 EST 1984

OSTI ID:5995871

Yoshino, H

A water heating system comprising an outdoor heat exchanger including a heat collection chamber, solar collector panels, collector fins, an evaporator for passing refrigerant therethrough to perform the heat exchange between the refrigerant and the heat transferred from the panels and fins to evaporate the refrigerant. The panels, fins and evaporator are incorporated integrally in the heat collection chamber. A variable rotational speed compressor is connected to the outdoor heat exchanger for compressing the vaporized refrigerant from the evaporator. A heat exchanger disposed on the bottom side in the water storage tank passes the refrigerant vapor from the compressor to perform the heat exchange between the water in the tank and the refrigerant vapor to condense the refrigerant vapor. A variable opening expansion valve adiabatically expands the refrigerant liquefied by the heat exchanger in the tank, thereby decreasing the pressure and temperature of the refrigerant and supplies the refrigerant thus adiabatically expanded to the outdoor heat exchanger. A control unit controls the rotational speed of the compressor and the opening of the expansion valve to maximize the coefficients of performance of the refrigeration cycle in response to the pressures and temperatures measured at various portions in the refrigeration cycle.

• Assignee: System Homes Company Ltd. (Japan); Mitsubishi Denki Kabushiki Kaisha (Japan)
• Patent Number(s): US 4481788
• OSTI ID: 5995871
• Resource Relation: Patent Priority Date: Priority date 8 Dec 1982, Japan; Other Information: PAT-APPL-448045
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
SOLAR WATER HEATERS
DESIGN
EVAPORATORS
FINS
HEAT EXCHANGERS
PERFORMANCE
REFRIGERANTS
REFRIGERATION
SOLAR COLLECTORS
SOLAR-ASSISTED HEAT PUMPS
TANKS
AIR CONDITIONERS
APPLIANCES
CONTAINERS
COOLING
ENERGY SYSTEMS
EQUIPMENT
FLUIDS
HEAT PUMPS
HEATERS
HEATING SYSTEMS
SOLAR AIR CONDITIONERS
SOLAR COOLING SYSTEMS
SOLAR EQUIPMENT
SOLAR HEATING SYSTEMS
WATER HEATERS
WORKING FLUIDS
140907* - Solar Thermal Utilization- Water Heating