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US 5,370,307 AGranted
Air conditioner having high heating capacity
AssigneeGas Research Institute
InventorYuzuru Uehra
Life of this patent
Estimating the term…
Abstract
An air conditioner has a heating capacity which is increased with a compressor driven by an engine when an outdoor temperature is too low. A work load of the compressor is increased by injecting refrigerant into the compressor via an injecting port. As a result, a load of the engine is also increased so that a coolant temperature is also increased. A large heat radiation from the hot coolant to the indoor air is established at a coolant heat exchanger.
Claims8
An air conditioner having a heating capacity, comprising:
- a heat pump circuit having a compressor, an indoor heat exchanger, a receiver which is located downstream of the indoor heat exchanger, an expansion valve, and an outdoor heat exchanger;
- the compressor being driven by an engine and having a suction port, a discharging port, and an injection port;
- detecting means for regulating an opening ratio of the expansion valve;
- refrigerant circulating in the heat pump circuit;
- injection means for injection one part of the refrigerant into the injection port;
- a coolant circuit of the engine;
- coolant circulating in the coolant circuit;
- a coolant heat exchanger for transferring heat from the coolant to the refrigerant prior to injecting the refrigerant into the injection port;
- and
- an indoor unit, said indoor unit including the indoor heat exchanger and the coolant heat exchanger to facilitate heat exchange between indoor air and refrigerant flowing through said indoor heat exchanger and between indoor air and coolant flowing through said coolant heat exchanger.
7 more elements
An air conditioner having a heating capacity, comprising:
- a heat pump circuit having a compressor, an indoor heat exchanger, a receiver which is located downstream of the indoor heat exchanger, a first expansion valve, and an outdoor heat exchanger;
- the compressor being driven by an engine and having a suction port, a discharging port, an injection port, a rotor and vanes, wherein the injection port is located in a spot where the injection port begins to open just after the suction process has been completed, and a diameter of the injection port is smaller than a width of each of the vanes;
- first detecting means for regulating an opening ratio of the first expansion valve;
- refrigerant circulating in the heat pump circuit;
- injection means for injecting one part of the refrigerant into the injection port;
- a coolant circuit of the engine;
- and
- a coolant circulating in the coolant circuit;
- a coolant heat exchanger for transferring heat from the coolant to the refrigerant prior to injecting the refrigerant into the injection port.
6 more elements
Dependencies are inferred from the claim text.