Abstract:
PROBLEM TO BE SOLVED: To provide a heat pump water heater capable of efficiently heating water by thermally insulating peripheral spaces of a compressor and a refrigerant pipe without increasing manufacturing cost and the size of the heater.SOLUTION: The heat pump water heater includes: a compressor housing unit 111 which is formed of a partition plate 27 and a housing external plate 32 forming an air blow circuit for blowing air to an evaporator 24 and in which a compressor 21 is disposed; an electrical component housing unit 28 which is disposed above the compressor housing unit 111; a refrigerating cycle component insulating part 113 in which insulator contacting the partition plate 27 and an inner side of housing external plate 32 surrounds at least the compressor 21 except the electrical component housing unit 28.The insulating component constituting the refrigerating cycle component insulating part 113 is disposed so as not to cover a connecting pipe portion 112 of the compressor 21 and the evaporator 24. Accordingly, whole space inside the refrigerating cycle component insulating part 113 can be insulated except the connecting pipe portion 112 with a complex configuration and thereby efficiency can be improved by insulation without increasing the cost.
Abstract:
PROBLEM TO BE SOLVED: To provide a refrigerating cycle device and a hot-water heating device capable of improving capacity and performance under a high compression ratio condition of high load in a space heating (heating) operation at a low outside air temperature. SOLUTION: This refrigerating cycle device includes a first bypass circuit 3a including a refrigerant circuit 2 configured by successively connecting a compressor 21, a condenser 22, a supercooling heat exchanger 23, a main expanding means 24 and an evaporator 25, and a control device 4, branched from between the supercooling heat exchanger 23 and the main expanding means 24, and connected to an intake side of the compressor 21 through the bypass expanding means 31 and the supercooling heat exchanger 23, and a second bypass circuit 4a branched from between the condenser 22 and the supercooling heat exchanger 23, and connected to an inlet side of the main expanding means 24 through a flow rate regulation means 41 and the evaporator 25. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a refrigerating cycle device and a hot-water heating device using the same capable of quickly lowering a discharge temperature even if the discharge temperature is abruptly raised. SOLUTION: The refrigerating cycle device includes a refrigerant circuit 1A configured by annularly connecting a compressor 11, a condenser 12, a supercooling heat exchanger 13, a main expansion valve 14 and an evaporator 15, a bypass passage 20 branched from a clearance between the condenser 12 and the supercooling heat exchanger 13, or a clearance between the condenser 12 and the main expansion valve 14, and connected to an inlet side of the compressor 11 or an intermediate pressure chamber of the compressor 11 through a bypass expansion valve 21 and the supercooling heat exchanger 13, and a control device 30. The control device 30 operates to increase an opening of the bypass expansion valve 21 by a predetermined prescribed opening when the discharge temperature of the compressor 11 is a predetermined prescribed discharge temperature or higher, and an operational frequency of the compressor 11 is a predetermined prescribed operational frequency or higher. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a refrigerating cycle device capable of effectively improving COP. SOLUTION: The refrigerating cycle device 1A includes a refrigerant circuit 2 provided with a supercooling heat exchanger 23, a bypass passage 3 bypassing the supercooling heat exchanger 23, and a control device 4 controlling a main expanding means 24 in the refrigerant circuit 2, and a bypass expanding means 31 in the bypass passage 3. The bypass expanding means 31 is controlled so that a dryness of a refrigerant flowing out from the supercooling heat exchanger 23 is kept to be 0.8 or more and less than 1.0 in the bypass passage 3. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a refrigerating cycle device free from radiation of heat in an internal heat exchanger during a defrosting operation without increasing manufacturing cost.SOLUTION: This refrigerating cycle device has a refrigerant circuit formed by successively connecting a compressor 21, a radiator 22, a pressure reducing means 23 and an evaporator 24, an air distributing means 27 for distributing the air to the evaporator 24, and an auxiliary heat exchanger 31 for heating at least a part of the air distributed by the air distributing means 27 by a refrigerant flowing out of the radiator 22. The refrigerant is successively circulated in the compressor 21, the radiator 22, the pressure reducing means 23 and the evaporator 24, the motion of the defrosting operation reduced in rotational frequency of the air distributing means 27, is performed, and the refrigerant at an outlet section of the evaporator 24 is heated by the air heated by the auxiliary heat exchanger 31.
Abstract:
PROBLEM TO BE SOLVED: To provide a refrigerating cycle device capable of suppressing the lowering of a temperature of a compressor, and capable of being operated with high energy efficiency.SOLUTION: The refrigerating cycle device includes: a refrigerant circuit 5 where a compressor 1, a radiator 2, a pressure reducing mechanism 3, and an evaporator 4 are connected in this order so that a refrigerant can be circulated; an evaporator temperature detecting means 12 for detecting a temperature of the evaporator 4, and control devices (11, 13). When a detection temperature detected by the evaporator temperature detecting means 12 after the lapse of a predetermined time from the start of defrosting operation for eliminating frost adhered to the evaporator 4 is lower than a prescribed temperature, a circulation amount of the refrigerant circulated in the refrigerant circuit 5 is increased, and the refrigerating cycle device can be operated with high energy efficiency.
Abstract:
PROBLEM TO BE SOLVED: To provide a heat pump water heater capable of performing reheating operation with high energy efficiency by suppressing an increase of a temperature of water flowing into a radiator, in a returning process from defrosting operation. SOLUTION: The heat pump water heater comprises a heat pump cycle 5 having a compressor 1, the radiator 2, a decompression means 3, and an evaporator 4 connected in series, a hot-water storage tank 11 for storing a heated fluid heated by the radiator 2, a circulation pump 12 for circulating the heated fluid to the hot-water storage tank 11 via the radiator 2, and a control means 15. At the time of changing the defrosting operation for removing the frost formation of the evaporator 4 to the hot water storing operation for heating the heated fluid by the radiator 2 by operating the circulation pump 12 and the compressor 1 to store the fluid in the hot-water storage tank 11, an output of the circulation pump 12 is set to become smaller as a target heating temperature of the heated fluid set beforehand in the radiator 2 becomes higher. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid circulation-type heating system capable of effectively utilizing solar heat. SOLUTION: This liquid circulation-type heating system 1A performs air-heating by heating a liquid to produce a heated liquid and releasing heat of the heated liquid from a heating radiator 3, and includes a heat pump circuit 20 having a radiator 22 for heating the liquid by radiating heat from a circulated refrigerant, and a solar heating apparatus 4A for heating the liquid by solar heat. In this liquid circulation-type heating system 1A, a first passage 3A passing through the radiator 22 and a second passage 3B passing through the solar heating apparatus 4A are formed as passages through which the liquid flows to produce the heated liquid. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To reduce the size of equipment without impairing the reliability while suppressing abnormal elevation in pressure on the high pressure side without using a receiver and an accumulator etc., in a refrigerating cycle device using a refrigerant capable of becoming a supercritical condition on the high pressure side. SOLUTION: The refrigerating cycle device forms a refrigerant circuit A comprising a compressor 11, a refrigerant flow path 12a of a radiator 12 as a hot water supply heat exchanger, a high pressure side refrigerant flow path 15a of an internal heat exchange means 15, a pressure reducer 13, an evaporator 14 and a low pressure side refrigerant flow path 15b of the internal heat exchange means 15. A pressure detecting device 24 detects that pressure on the high pressure side rises close to design pressure, and a solenoid valve control device 25 controls a first solenoid valve 17 provided in a bypass circuit 16 to be in a closed condition. A low pressure side refrigerant is made to flow into the low pressure side refrigerant flow path 15b between the outlet of the evaporator 14 and the inlet of the compressor 11 and a high pressure side refrigerant made to flow in the high pressure side refrigerant flow path 15a between the outlet of the radiator 12 and the inlet of the pressure reducer 13 is cooled, to reduce the pressure on the high pressure side. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a refrigerating cycle device capable of shortening defrosting operation time without deteriorating reliability and increasing electric energy consumption. SOLUTION: The refrigerating cycle device includes a refrigerating cycle annularly connecting a compressor 1, a radiator 2, a first pressure reducing mechanism 3, an evaporator 4, and a second pressure reducing mechanism 5 in this order and circulating a coolant, and it is characterized by that openings of the first pressure reducing mechanism 3 and the second pressure reducing mechanism 5 are controlled such that a pressure of the coolant circulating in the evaporator 4 becomes higher than a pressure of the coolant sucked into the compressor 1 during defrosting operation. During the defrosting operation, by increasing the pressure of the coolant circulating in the evaporator 4 than the pressure of the coolant sucked into the compressor 1, an effect can be exerted of raising a temperature of the coolant circulating in the evaporator, and shortening the defrosting operation time. COPYRIGHT: (C)2010,JPO&INPIT