摘要:
Provided is a refrigeration apparatus that uses R32 for the refrigerant, and that is capable of injection in order to suppress the discharge temperature even in the case in which operating efficiency deteriorates by intermediate injection. An air conditioning apparatus (10) that uses R32 refrigerant is provided with a compressor (20), an indoor heat exchanger (50), an outdoor expansion valve (41), an outdoor heat exchanger (30), an intermediate injection channel (65), a suction injection channel (67) and injection switching valves (66, 68). The intermediate injection channel (65) causes a part of the refrigerant flowing in a main refrigerant channel (11a) to merge with intermediate-pressure refrigerant of the compressor (20). The suction injection channel (67) guides a part of the refrigerant in the main refrigerant channel (11a) to a suction passage (27).
摘要:
Provided is a refrigeration apparatus that uses R32 for the refrigerant, and that is capable of injection in order to suppress the discharge temperature even in the case in which operating efficiency deteriorates by intermediate injection. An air conditioning apparatus (10) that uses R32 refrigerant is provided with a compressor (20), an indoor heat exchanger (50), an outdoor expansion valve (41), an outdoor heat exchanger (30), an intermediate injection channel (65), a suction injection channel (67) and injection switching valves (66, 68). The intermediate injection channel (65) causes a part of the refrigerant flowing in a main refrigerant channel (11a) to merge with intermediate-pressure refrigerant of the compressor (20). The suction injection channel (67) guides a part of the refrigerant in the main refrigerant channel (11a) to a suction passage (27).
摘要:
Provided is a refrigeration apparatus that uses R32 for the refrigerant, and that is capable of injection in order to suppress the discharge temperature even in the case in which operating efficiency deteriorates by intermediate injection. An air conditioning apparatus (10) that uses R32 refrigerant is provided with a compressor (20), an indoor heat exchanger (50), an outdoor expansion valve (41), an outdoor heat exchanger (30), an intermediate injection channel (65), a suction injection channel (67) and injection switching valves (66, 68). The intermediate injection channel (65) causes a part of the refrigerant flowing in a main refrigerant channel (11a) to merge with intermediate-pressure refrigerant of the compressor (20). The suction injection channel (67) guides a part of the refrigerant in the main refrigerant channel (11a) to a suction passage (27).
摘要:
Provided is a refrigeration apparatus that uses R32 for the refrigerant, and that is capable of injection in order to suppress the discharge temperature even in the case in which operating efficiency deteriorates by intermediate injection. An air conditioning apparatus (10) that uses R32 refrigerant is provided with a compressor (20), an indoor heat exchanger (50), an outdoor expansion valve (41), an outdoor heat exchanger (30), an intermediate injection channel (65), a suction injection channel (67) and injection switching valves (66, 68). The intermediate injection channel (65) causes a part of the refrigerant flowing in a main refrigerant channel (11a) to merge with intermediate-pressure refrigerant of the compressor (20). The suction injection channel (67) guides a part of the refrigerant in the main refrigerant channel (11a) to a suction passage (27).
摘要:
Motor drive device (30) includes brushless DC motor (5) that drives a load and speed controller (8) that decides a PWM ON ratio for performing PWM control on brushless DC motor (5). The motor drive device further includes PWM ON ratio increasing-reducing unit (9) that increases/reduces the PWM ON ratio in accordance with a driving speed of brushless DC motor (5) and drive unit (10) that performs PWM control for driving brushless DC motor (5) in accordance with the PWM ON ratio decided by PWM ON ratio increasing-reducing unit (9). PWM ON ratio increasing-reducing unit (9) sets the PWM ON ratio to a ratio equal to or lower than the PWM ON ratio decided by speed controller (8) in an interval in which the driving speed of brushless DC motor (5) is lower than a predetermined speed, and sets the PWM ON ratio to a ratio equal to or higher than the PWM ON ratio decided by speed controller (8) in an interval in which the driving speed is higher than the predetermined speed.
摘要:
A C02 refrigeration system has an LT system with LT compressors and LT evaporators, and an MT system with MT compressors and MT evaporators, operating in a refrigeration mode and a defrost mode using C02 hot gas discharge from the MT and/or the LT compressors to defrost the LT evaporators. A C02 refrigerant circuit directs C02 refrigerant through the system and has an LT compressor discharge line with a hot gas discharge valve, a C02 hot gas defrost supply header directing C02 hot gas discharge from the LT and/or the MT compressors to the LT evaporators, a flash tank supplying C02 refrigerant to the MT and LT evaporators during the refrigeration mode, and receiving the C02 hot gas discharge from the LT evaporators during the defrost mode, and a control system directing the C02 hot gas discharge through the LT evaporators and to the flash tank during the defrost mode.
摘要:
A pressure control device for controlling a compressor includes a pressure sensor configured to measure pressure of a pressure line and a processing circuit. The processing circuit is configured to receive the measured pressure of the pressure line from the pressure sensor and control the compressor based on a set-point and the measured pressure. The pressure control device includes a mechanical switch sensitive to the pressure of the pressure line and configured to move between an open position and a closed position responsive to the pressure of the pressure line. Movement of the mechanical switch into one of the open position or the closed position causes the compressor to turn off and overrides the control of the compressor by the processing circuit.
摘要:
Die vorliegende Erfindung betrifft eine Absorptionswärmepumpe mit einem Generator (20), der zur Aufnahme einer ein Kältemittel enthaltenden Lösung ausgebildet ist, einer Wärmequelle, der zum Erhitzen des Generators (20) ausgebildet ist, um einen Kältemitteldampf aus der Lösung auszutreiben, und einem Kondensator zum Abkühlen des Kältemitteldampfs gegen einen Verbraucher. Ein Expansionsventil (40) ist vorgesehen, welches zum Expandieren des Kältemittelfluids ausgebildet ist, sowie ein Verdampfer (50) zum mindestens teilweisen Verdampfen des expandierten Kältemittelfluids gegen ein Medium, welcher mit mindestens einem Absorber (60, 60A, 60B) in Verbindung steht, der zum Absorbieren des expandierten Kältemittelfluids durch eine kältemittelarme Lösung vorgesehen ist. Erfindungsgemäß ist eine Heißgasleitung (100) vorgesehen, die von einer Leitung (32) für Kältemitteldampf vor dem Kondensator (30) abzweigt und mit dem Verdampfer (50) so in Fluidverbindung steht, dass sie den Kondensator (30) und das Expansionsventil (40) umgeht, wobei ein Abtauventil (102) in der Heißgasleitung vorgesehen ist, mittels dessen der Durchfluss von Kältemitteldampf durch die Heißgasleitung gesteuert werden kann. Die Erfindung betrifft ferner ein Verfahren zum Betreiben einer Absorptionswärmepumpe in einem zyklischen Kreisprozess, wobei in einem Abtaubetrieb der dem Generator entnommene Kältemitteldampf mindestens teilweise vor dem Kondensator (30) abgezweigt und dem Verdampfer (50) unter Umgehung von Kondensator (30) und Expansionsventil (40) zugeführt wird, um den Verdampfer zu erwärmen.
摘要:
The invention relates to an air-conditioning system (4) comprising a coolant compressor having a low-pressure inlet (11) and a high-pressure outlet (12), and a variable flow resistance arranged in a main mass flow from the high-pressure outlet of the coolant compressor to a consumer. The invention is characterised in that a mass flow regulating device in the main mass flow has a variable flow resistance that can be adjusted by means of a control device (32).
摘要:
An ice cube-making machine that is characterized by noiseless operation at the location where ice cubes are dispensed and be lightweight packages for ease of installation. The ice cube-making machine has an evaporator package (30), a separate compressor package (50) and a separate condenser package(70). Each of these packages has a weight that can generally by handled by one or two installers for ease of installation. The noisy compressor and condenser packages can be located remotely of the evaporator package. The maximum height distance between the evaporator package and the condenser package is greatly enhanced by the three package system. A pressure regulator (157) operates during a harvest cycle to limit flow of refrigerant leaving the evaporator, thereby increasing pressure and temperature of the refrigerant in the evaporator and assisting in defrost thereof.