Abstract:
PROBLEM TO BE SOLVED: To provide an absorption heat pump which can be operated with appropriate COP while making it possible to improve temperature elevating capacity.SOLUTION: The absorption heat pump 1 includes: a first absorber 10 for heating a medium W to be heated with absorption heat generated when a first absorption liquid Sa absorbs first refrigerant steam Vr; an evaporator 20 for supplying the first refrigerant steam Vr to the first absorber 10; a second absorber 30 for generating the first refrigerant steam Vr by heating a refrigerant liquid Vf inside the evaporator 20 with the absorption heat generated when a second absorption liquid Sb absorbs second refrigerant steam Vs; a first regenerator 60 for generating an intermediate concentration absorption liquid Sb by introducing, heating and condensing dilute solutions Sw, Sv; a second regenerator 50 for generating the first absorption liquid Sa by heating and condensing the intermediate concentration absorption liquid Sb; and an absorption heat conveying means 51 for conveying the absorption heat generated in the second absorber 30 into the second regenerator 50. Thus, the heat input to the first regenerator 60 is utilized at a maximum as the heat to be used for regenerating the absorption liquid.
Abstract:
PROBLEM TO BE SOLVED: To provide an absorption heat pump capable of stably avoiding crystallization of absorption solution even when a solution pump cannot be operated before dilution operation of the absorption solution is completed. SOLUTION: The absorption heat pump 1 includes: an absorber 10; a regenerator 30; a diluted solution line 16; a concentrated solution line 35 having the solution pump 35p pressure feeding concentrated solution Sa; and a dilution pipe 58A (58B) having a backflow prevention means 59A (59B) allowing a flow of diluted solution Sw from the diluted solution line 16 side to the concentrated solution line 35 side and blocking a flow of the concentrated solution Sa pressure fed by the solution pump 35p from the concentrated solution line 35 side to the diluted solution line 16 side. Even when the solution pump 35p cannot be operated, the diluted solution Sw can be mixed with the concentrated solution Sa via the dilution pipe 58A (58B) so as to dilute the concentrated solution Sa. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a compression type refrigerating machine which is higher in efficiency and more inexpensive than an existing double refrigerating cycle compression type refrigerating machine.SOLUTION: The compression type refrigerating machine includes a high-pressure condenser 22 and a low-pressure condenser 20, a high-pressure evaporator 14 and a low-pressure evaporator 12, and a compressor 18 connected to the high-pressure condenser 22, and a compressor 16 connected to the low-pressure condenser 20, and has double refrigerating cycles. A refrigerant liquid condensed by the high-pressure condenser 22 is introduced into the low-pressure condenser 20, and control valves V1, V2 are provided at least between the compressor 18 connected to the high-pressure condenser 22 and the high-pressure condenser 22, between the compressor 16 connected to the low-pressure condenser 20 and the low-pressure condenser 20, or between the high-pressure condenser 22 and low-pressure condenser 20.
Abstract:
PROBLEM TO BE SOLVED: To provide a turbo refrigerating machine system which is a turbo refrigerating system including a refrigerating machine group having a plurality of turbo compressors for achieving synthetic energy saving by controlling the number of operation of the turbo compressors in the refrigerating machine group with a simple device.SOLUTION: This turbo refrigerating machine system includes: a plurality of turbo compressors for sucking and compressing refrigerant gas; a plurality of variable speed driving machines for driving each of the plurality of turbo compressors; and a control means 70 for controlling the output of a refrigerating machine 101 equipped with the turbo compressors by adjusting the rotational speeds of the variable speed driving machines in accordance with a refrigeration load. The control means 70 includes a number control part 76 for increasing the number of operation of the turbo compressors on the basis of the rotational speed difference threshold of a difference or rate between the rotational speed and a reference rotational speed.
Abstract:
PROBLEM TO BE SOLVED: To provide a compression refrigerating machine easily improved in a coefficient of performance, and an economizer unit which can be mounted to an existing compression refrigerating machine and improve the coefficient of performance.SOLUTION: The compression refrigerating machine includes: an evaporator 40 evaporating refrigerant liquid into refrigerant gas; a main compressor 10 sucking in and compressing the refrigerant gas; a condenser 30 drawing heat from the refrigerant gas compressed by the main compressor 10 to condense the same into the refrigerant liquid; an economizer 20 evaporating the refrigerant liquid condensed by the condenser 30 into the refrigerant gas at an economizer pressure Pm intermediate between the evaporating pressure Pe of the evaporator 40 and the condensing pressure Pc of the condenser 30, cooling the refrigerant liquid with the evaporation heat during the evaporation, and sending the cooled refrigerant liquid to the evaporator 30; and an auxiliary compressor 70 sucking in, compressing the refrigerant gas evaporated in the economizer 20 and sending the same to the condenser 30.
Abstract:
PROBLEM TO BE SOLVED: To provide an absorption heat pump for effectively utilizing absorption heat while suppressing conveying power.SOLUTION: The absorption heat pump 1 includes: a first absorber 10 for heating a medium W to be heated with absorption heat generated when a first absorption liquid Sa absorbs first refrigerant steam Vr; an evaporator 20 for supplying the first refrigerant steam Vr to the first absorber 10; a second absorber 30 for generating the first refrigerant steam Vr by heating a refrigerant liquid Vf inside the evaporator 20 with the absorption heat generated when a second absorption liquid Sb absorbs second refrigerant steam Vs; a regenerator 50 for generating the first absorption liquid Sa by evaporating a refrigerant V from a dilute solution Sw; and a refrigerant steam heat source pipe 51 for making the first refrigerant steam Vr inside the evaporator 20 flow to the inside. The refrigerant steam heat source pipe 51 is disposed so as to pass through the inside of the regenerator 50. Then, since the absorption heat generated in the second absorber 30 is guided to the regenerator 50 after tentatively changing its form into the first refrigerant steam Vr, special conveying power is not required.
Abstract:
PROBLEM TO BE SOLVED: To provide a refrigerant recovering device capable of minimizing an amount of a refrigerant leaking to the atmospheric air in accompany with a non-condensation gas, and recovering the refrigerant. SOLUTION: In the refrigerant recovering device 50 in which a compact condenser 1 having a heat exchanger 2 inside thereof, and a compression-type refrigerating machine are connected by a communication pipe 9 having a vacuum pump 6, a refrigerant gas from the compression-type refrigerating machine is introduced into the compact condenser 1 by operating the vacuum pump 6, the introduced refrigerant gas is condensed and liquefied by guiding a cooling medium to the heat exchanger 2, and the liquefied refrigerant is recovered in a refrigerant recovering container, the refrigerant recovering device 50 has an adsorption tank 63 having a refrigerant adsorbent 60 and a heater 58 for heating the refrigerant adsorbent, and a connection pipe 54 connecting the compact condenser 1 and the adsorption tank 63 and having an opening/closing valve 5 and an orifice 57, and the adsorption tank 63 includes a connection pipe having an opening/closing valve 52 connected to an external discharge port 64. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a connected type water cooler-heater, and its operating method reducing an initial cost of a whole of the connected type water cooler-heater, and capable of carrying out highly efficient (COP) operation in response to a load by composing water cooler-heaters of the connected type water cooler-heater by at least one commercial power source driven water cooler-heater, and at least one inverter driven water cooler-heater. SOLUTION: The operating method is for the connected type water cooler-heater provided with the commercial power source driven water cooler-heater 11 connected to a common cold water pipe arrangement 14, a commercial power source driven slave water cooler-heater 12-1, and an inverter driven slave water cooler-heater 12-2. Each water cooler-heater carries out predetermined certain temperature control of each cold water outlet temperature. An optimum operating number is calculated at every interval certain by the number of connected water cooler-heaters, a set temperature difference of a cold water inlet and outlet, and the cold water inlet temperature. By comparison between the optimum operating number and an operating number, the operating number is maintained at the present or varied to operate the water cooler-heaters at the optimum operating number. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a surge detector and a surge detecting method of a turbo refrigerator accurately detecting a surge while monitoring the operating current to a motor that drives a turbo compressor in the variable speed turbo refrigerator. SOLUTION: The surge detector of the turbo refrigerator provided with the turbo compressor driven by the motor includes: a rate of change of current detecting means (a differentiation circuit 31) detecting the rate of change of the operating current to the motor; and a surge detecting means (a comparing circuit 33, an off-delay circuit 34, and an on-delay circuit 36) detecting a surge from the rate of change of current detected by the rate of change of current detecting means. COPYRIGHT: (C)2011,JPO&INPIT