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Patent
Mayekawa Manufacturing Co. | Date: 2017-01-25

A bone-in meat deboning apparatus according to the present invention includes: a clamper for holding a piece of bone-in meat including a bone head at least in one end; a first cutter capable of moving toward and away with respect to the piece of bone-in meat being held by the clamper at the first end, for making a cut in a circumferential direction on a meat portion of the piece of bone-in meat in a vicinity of a held section; at least one meat-portion peeling member insertable into the cut on the piece of bone-in meat held by the clamper; an elastic support part for elastically supporting the meat-portion peeling member so that the meat-portion peeling member applies an elastic force to the piece of bone-in meat; a meat-portion-peeling driving part capable of changing a distance between the clamper and the meat-portion peeling member; and a second cutter capable of moving toward and away with respect to the piece of bone-in meat held by the clamper, for cutting the meat portion adhering to the second end including the bone head of the piece of bone-in meat.


Patent
Mayekawa Manufacturing Co. and Railway Technical Research Institute | Date: 2016-02-03

Provided is a cooling device for a superconductive cable which can be installed in a limited installation space with an efficient arrangement. A cooling device (10) cools a superconducting cable (11), by supplying and circulating a refrigerant. The cooling device (10) includes a reservoir tank (12) which stores the refrigerant, a circulation pump unit (13) which pumps the refrigerant, and a cooling unit (14) which cools the refrigerant. The circulation pump unit and the cooling unit are accommodated in the reservoir tank, whereby a compact cooling device can be achieved.


Patent
Mayekawa Manufacturing Co. | Date: 2016-11-30

A CO2 water heater includes: a CO2 circulation path 14; a compressor 16, a gas cooler 18 and an expansion valve 20 provided on the CO2 circulation path 14; a bypass passage 30 to bypass the expansion valve 20; a supercritical tank 32 and flow regulating valves (34, 35) provided on the bypass passage 30. The CO2 circulation path 14 has two CO2 branch passages (14b, 14c) branched in a parallel manner between the compressor 16 and a downstream portion of the expansion valve 20. An air-heat-source heat exchanger (22a, 22b) is provided on the CO2 branch passage 14b, and a water-heat-source heat exchanger 24 is provided on the CO2 branch passage 14c. Electromagnetic valves (48, 50) to switch a CO2 flow path to the CO2 branch passage 14b or the CO2 branch passage 14c, and a blower 46 to form an air flow to be sent to the air-heat-source heat exchanger (22a, 22b) are provided.


Patent
MAYEKAWA Manufacturing CO. | Date: 2016-03-11

A low-cost and space-saving cooling apparatus for a superconductor that prevents a function of the superconductor being compromised when a refrigerator is faulty. A cooling apparatus for a superconductor forms a circulation path in which a coolant, having been used for cooing the superconductor, is pumped by a circulation pump to a heat exchanger unit so that the coolant is cooled by a refrigerator, and the coolant is supplied to the superconductor. The cooling apparatus for a superconductor includes: a sub-cooling tank which is disposed on a downstream side of the superconductor and on an upstream side of the heat exchanger unit in the circulation path and which is configured to store a secondary coolant for cooling the coolant; a secondary heat exchanger unit which is disposed in the sub-cooling tank and which is configured to cool the coolant, having been used for cooling the superconductor, through heat exchange with the secondary coolant; a depressurizing unit configured to reduce pressure in the sub-cooling tank to cool the secondary coolant; a temperature detection unit for detecting temperature of the secondary coolant; a fault detection unit capable of detecting a fault state of the refrigerator; and a control unit configured to determine whether the refrigerator is faulty, based on information detected by the fault detection unit, and to control, upon determining that the refrigerator is faulty, an operation of the depressurizing unit so that the temperature of the secondary coolant, detected by the temperature detection unit, becomes a predetermined temperature at which the secondary coolant is capable of cooling the superconductor through the coolant.


Patent
Mayekawa Manufacturing Co. | Date: 2015-01-21

A deboning system for an arm part of bone-in meat includes: a clamp which suspends the arm part of the bone-in meat by holding a tip part of a forearm bone; at least one forearm-bone incision making device which is configured to cut the bone-in meat around the forearm bone of the arm part in a state where the arm part of the bone-in meat is suspended by the clamp; an olecranon incision making device which is disposed along an endless track and which is configured to cut meat around the olecranon of the arm part of the bone-in meat in a state where the arm part of the bone-in meat is suspended by the clamp; and a forearm-bone separation device which is disposed along the endless track and which is configured to pull the bone-in meat suspended by the clamp such that the forearm bone and an upper arm bone of the bone-in meat are separated from each other, wherein the at least one forearm-bone incision making device includes a robot arm disposed along the endless track and a forearm cutter attached to the robot arm, and the olecranon incision making device includes a pair of olecranon cutters disposed on both sides of the endless track.


Patent
Mayekawa Manufacturing Co. | Date: 2016-08-17

To reduce heat transfer from leakage fluid from a compressor side to an expander in a casing of an expander-integrated compressor to improve the coefficient of performance (COP) of a refrigerator, the expander-integrated compressor includes a motor, a compressor connected to an output shaft of the motor, an expander connected to the output shaft of the motor, a non-contact bearing disposed between the compressor and the expander, a casing, and an extraction line provided so as to be in communicated with a region between the compressor and the expander in the internal space of the casing and configured to extract, from the region, the leakage fluid from the compressor side toward the expander side in the casing and to send the leakage fluid to a fluid line connected to the intake side or the discharge side of the compressor outside the casing. The casing is configured to seal the region from outside of the casing so that the flow of the at least a part of the leakage fluid through the extraction line is the only flow of fluid between the region and the outside of the casing.


Patent
Mayekawa Manufacturing Co. | Date: 2015-07-08

A reciprocating compressor according to at least one embodiment of the present invention includes a housing which includes an intake chamber, a discharge chamber, a cylinder, and a crank chamber, the crank chamber having a lower portion formed as an oil storage chamber configured to store lubricant; a piston which is reciprocatively located in the cylinder; a crank shaft which is rotatably arranged in the crank chamber and is coupled to the piston via a connecting rod; a pressure equalization path through which the intake chamber and the crank chamber communicates, the pressure equalization path having an opening end open to the crank chamber; and a partition member which is located between the crank shaft and the opening end of the pressure equalization path. The partition member extends below the crank shaft from one side of the crank shaft to the other side of the crank shaft so as to cover at least the lower side of the crank shaft.


Patent
Mayekawa Manufacturing Co. | Date: 2016-01-20

To provide a refrigeration system capable of being installed efficiently in a limited space while ensuring a good reliability, the refrigeration system according to the present invention comprises a refrigeration cycle having: a circulation path (101) in which a refrigerant flows; and at least one compressor (102) for compressing the refrigerant, a heat exchanger (103) for cooling the refrigerant compressed by the compressor, at least one expansion turbine (104) for expanding the refrigerant cooled by the heat exchanger to generate cold heat, and a cooling part (105) for cooling an object to be cooled by the cold heat, which are provided on the circulation path in order, wherein at least either the at least one compressor or the at least one expansion turbine comprises a plurality of compressors or expansion turbines which are arranged in parallel with one another with respect to the circulation path.


Patent
Mayekawa Manufacturing Co. | Date: 2016-05-04

An object is to provide a freeze-drying system and a freeze-drying method which can improve cleanliness and productivity. The present invention relates to a freeze-drying system in which freeze-drying is performed by sublimating moisture frozen by cooling an object. The system includes a cooling device (3) which generates cold with an air cycle in which air is used as a refrigerant, a freeze-drying chamber (2) accommodating a heat exchange unit which causes heat exchange between the refrigerant and the object, and a control unit (11) which controls a cooling capacity of the cooling device. The control unit adjusts the temperature in the freeze-drying chamber to a predetermined target temperature by controlling an amount of the cold generated in the cooling device.


Patent
Mayekawa Manufacturing Co. | Date: 2015-11-04

A defrost system includes: a cooling device which is disposed in a freezer, and includes a heat exchanger pipe with a difference in elevation disposed in a casing, and a drain receiver unit disposed below the heat exchanger pipe; a refrigerating device configured to cool and liquefy CO_(2) refrigerant; a refrigerant circuit for permitting the CO_(2) refrigerant cooled and liquefied in the refrigerating device to circulate to the heat exchanger pipe; a bypass pipe connected between an inlet path and an outlet path of the heat exchanger pipe to form a CO_(2) circulation path including the heat exchanger pipe; an on-off valve disposed in each of the inlet path and the outlet path of the heat exchanger pipe and configured to be closed at a time of defrosting so that the CO_(2) circulation path becomes a closed circuit; a pressure adjusting unit for adjusting pressure of the CO_(2) refrigerant circulating in the closed circuit at the time of defrosting; and a brine circuit which includes a first lead path disposed adjacent to lower area of the heat exchanger pipe in the cooling device and forming a first heat exchanger part for heating the CO_(2) refrigerant circulating in the heat exchanger pipe, with brine, in the lower area of the heat exchanger pipe, in which the defrost system permits the CO_(2) refrigerant to naturally circulate in the closed circuit at the time of defrosting by a thermosiphon effect.

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