Abstract: A cooling storage cabinet includes a freezing compartment, a refrigerating compartment, a compressor, a three-way valve, and a control circuit.

Abstract: A deviation calculating unit 42 calculates a deviation between an internal temperature detected by a temperature sensor 35 and a target temperature provided from a target temperature setting unit 41 for each predetermined time period. The deviation is integrated by a deviation integrating unit 46. When the integrated value exceeds a predetermined reference value, a rotational speed of an inverter motor that drives a compressor is increased. Therefore, for example, even if an internal temperature temporarily rises because a door is opened temporarily and outside air flows into a storage compartment, because there is no sudden change in the integrated value of the temperature deviation and the rotational speed of the compressor does not react in an oversensitive manner and rapidly increase. Consequently the control is stable. Thus, an unnecessarily oversensitive response to a sudden change in an internal temperature can be prevented, enabling operation at a higher efficiency.

Abstract: A liquid refrigerant from a compressor and a condenser is alternately supplied to a cooling device for the freezing room 27F and an evaporator for refrigeration room through a three-way valve, so as to conduct the cooling of a freezing room and a refrigeration room. When the thermal load condition of a refrigerating cycle is light, the three-way valve switches to the “F side opened-state” after the compressor is stopped, and thereby conducting pressure balancing, without the liquid refrigerant flowing into the evaporator for refrigeration room. A cooling storage, wherein from one compressor a refrigerant is selectively supplied to multiple evaporators, is constituted so as to prevent one evaporator side from becoming a supercooled state, and furthermore, quickly conduct pressure balancing after stop of the compressor.

Abstract: The liquid refrigerant from the compressor 20 and the condenser 21 is alternately supplied to the cooling device for the freezing room 27F and the evaporator for the refrigeration room 27R through the three-way valve 24, so that the freezing room and the refrigeration room are alternately cooled. Here, the ratio of the refrigerant supply time to each evaporator is controlled based not on a deviation between a target temperature set for each storage room and an actual storage room temperature measured in each storage room, but on an integrated value obtained by integrating the difference of these deviations. In a cooling storage, in which from one compressor a refrigerant is selectively supplied to multiple evaporators respectively disposed in multiple storage rooms of varied thermal loads, a one-storage room cooling mode is prevented from being unnecessarily switched to a alternate cooling mode.

Abstract: When an internal temperature of a freezing compartment becomes lower than a lower limit temperature during R-compartment F-compartment alternate cooling, starting R-individual overcool preventing control is requested. Then, the rotational speed of a compressor is decreased by one stage and, subsequently, a three-way valve enters “R-side open state”, and individual cooling of the refrigerating compartment is executed. Thereafter, every 30 seconds, the rotational speed of the compressor is decreased by one stage. When the refrigerating compartment becomes lower than a lower limit temperature, stopping R-individual overcool preventing control is requested. Then, the process shifts to individual cooling of the freezing compartment and then, after the freezing compartment to again become lower than the lower limit temperature, the compressor is stopped. When shifted to the individual cooling of the refrigerating compartment, the rotational speed of the compressor is drastically decreased in a short time.

Abstract: An auger type ice making machine is provided with a freezing cylinder into which water for making ice is supplied, an ice-scraping auger for scraping ice formed on the inner surface of the freezing cylinder, and an auger motor for driving the ice-scraping auger. A freezing apparatus has a compressor driven by a motor, circulating refrigerant discharged from the compressor through a condenser, a dryer, a constant pressure expansion valve, and an evaporator provided on the outer peripheral surface of the freezing cylinder. At the outlet of the evaporator there is provided a temperature sensor for sensing refrigerant temperature. A controller controls the rotational speed of the motor through an inverter circuit such that the sensed refrigerant temperature is equal to a specified refrigerant temperature, allowing the freezing apparatus to keep ice-making performance thereof.

Abstract: The liquid refrigerant from the compressor 20 and the condenser 21 is alternately supplied to the cooling device for the freezing room 27F and the evaporator for the refrigeration room 27R through the three-way valve 24, so that the freezing room and the refrigeration room are alternately cooled. Here, the ratio of the refrigerant supply time to each evaporator is controlled based not on a deviation between a target temperature set for each storage room and an actual storage room temperature measured in each storage room, but on an integrated value obtained by integrating the difference of these deviations. In a cooling storage, in which from one compressor a refrigerant is selectively supplied to multiple evaporators respectively disposed in multiple storage rooms of varied thermal loads, a one-storage room cooling mode is prevented from being unnecessarily switched to a alternate cooling mode.

Abstract: PROBLEM TO BE SOLVED: To provide a cooling storage, in which a refrigerant from one compressor is selectively supplied to multiple evaporators respectively disposed in multiple storage rooms having different thermal loads, and prevent any temperature rise of a storage room of higher thermal load. SOLUTION: The liquid refrigerant from the compressor 20 and the condenser 21 is alternately supplied to the cooling device for the freezing room 27F and the evaporator for the refrigeration room 27R through the three-way valve 24, so that the freezing room and the refrigeration room are alternately cooled. Even if any one of the freezing room 13F and the refrigeration room 13R reached the lower limit set temperature on ahead, the freezing room 13F (the storage room of higher thermal load) is always cooled last and certainly cooled until it reaches the lower limit set temperature.

Abstract: A liquid refrigerant from a compressor 20 and a condenser 21 is alternately supplied to a cooling device for the freezing room 27F and an evaporator for refrigeration room 27R through a three-way valve 24, so as to conduct the cooling of a freezing room and a refrigeration room. When the thermal load condition of a refrigerating cycle 40 is light, the three-way valve 24 switches to the “F side opened-state” after the stop of the compressor 20, and thereby conducting pressure balancing, without the liquid refrigerant flowing into the evaporator for refrigeration room 27R. A cooling storage, wherein from one compressor a refrigerant is selectively supplied to multiple evaporators, is constituted so as to prevent one evaporator side from becoming a supercooled state, and furthermore, quickly conduct pressure balancing after stop of the compressor.

Abstract: Deviation calculating means 42 calculates a deviation between an internal temperature detected by a temperature sensor 35 and a target temperature provided from target temperature setting means 41 for each predetermined time period. The deviation is integrated by deviation integrating means 46. When the integrated value exceeds a predetermined reference value, a rotational speed of an inverter motor that drives a compressor is increased. Therefore, for example, even if an internal temperature temporarily rises because a door is opened temporarily and outside air flows into a storage compartment, because there is no sudden change in the integrated value of the temperature deviation and the rotational speed of the compressor does not react in an oversensitive manner and rapidly increase. Consequently the control is stable. Thus, an unnecessarily oversensitive response to a sudden change in an internal temperature can be prevented, enabling operation at a higher efficiency.

Abstract: When an internal temperature of a freezing compartment becomes lower than a lower limit temperature TF(OFF) during R-compartment F-compartment alternate cooling, a request for start of R-individual overcool preventing control is made. Then, the rotational speed of the compressor is decreased by one stage and, subsequently, a three-way valve comes to a “R-side open state”, and thus individual cooling of the refrigerating compartment is executed. Thereafter, after a set time, the rotational speed of the compressor is decreased by one stages. When the refrigerating compartment becomes lower than a lower limit temperature TR(OFF), a request for stop of the R-individual overcool preventing control is made. Then, the process shifts to individual cooling of the freezing compartment and then, after waiting for the freezing compartment to again become lower than the lower limit temperature, the compressor is stopped.

Abstract: An auger type ice making machine is provided with a freezing cylinder into which water for making ice is supplied, an ice-scraping auger for scraping ice formed on the inner surface of the freezing cylinder, and an auger motor for driving the ice-scraping auger. A freezing apparatus has a compressor driven by a motor, circulating refrigerant discharged from the compressor through a condenser, a dryer, a constant pressure expansion valve, and an evaporator provided on the outer peripheral surface of the freezing cylinder. At the outlet of the evaporator there is provided a temperature sensor for sensing refrigerant temperature. A controller controls the rotational speed of the motor through an inverter circuit such that the sensed refrigerant temperature is equal to a specified refrigerant temperature, allowing the freezing apparatus to keep ice-making performance thereof.

Abstract: An auger type ice making machine is provided with a freezing cylinder (21) into which water for making ice is supplied, an ice-scraping auger (23) for scraping ice formed on the inner surface of the freezing cylinder (21), and an auger motor (25) for driving the ice-scraping auger (23). An freezing apparatus (10) has a compressor (11) driven by a motor (16), circulating refrigerant discharged from the compressor (11) through a condenser (12), a dryer (13), a constant pressure expansion valve (14), and an evaporator (15) provided on the outer peripheral surface of the freezing cylinder (21). At the outlet of the evaporator (15) there is provided a temperature sensor (41) for sensing refrigerant temperature. A controller (42) controls the rotational speed of the motor (16) through an inverter circuit (43) such that the sensed refrigerant temperature is equal to a specified refrigerant temperature, allowing the freezing apparatus (10) to keep ice-making performance thereof.

Abstract: An auger type ice making machine is provided with a freezing cylinder (21) into which water for making ice is supplied, an ice-scraping auger (23) for scraping ice formed on the inner surface of the freezing cylinder (21), and an auger motor (25) for driving the ice-scraping auger (23). An freezing apparatus (10) has a compressor (11) driven by a motor (16), circulating refrigerant discharged from the compressor (11) through a condenser (12), a dryer (13), a constant pressure expansion valve (14), and an evaporator (15) provided on the outer peripheral surface of the freezing cylinder (21). At the outlet of the evaporator (15) there is provided a temperature sensor (41) for sensing refrigerant temperature. A controller (42) controls the rotational speed of the motor (16) through an inverter circuit (43) such that the sensed refrigerant temperature is equal to a specified refrigerant temperature, allowing the freezing apparatus (10) to keep ice-making performance thereof.