摘要:
When during a heating operation the value calculated by an oil amount calculation section (51) is equal to or above a predetermined value, a frequency control section (52) of a controller (50) increases the operating frequency of a compressor (21) in order to recover refrigerating machine oil in a refrigerant circuit (R).
摘要:
In concurrent operation of performing a refrigeration cycle in which an outdoor heat exchanger (22) functions as a condenser, and at least one of a plurality of indoor heat exchangers (31, 41, 51) functions as a condenser, pressure difference ΔP1 between a high pressure refrigerant an a refrigerant in a liquid pipe (15) is detected, and the degree of opening of an outdoor expansion valve (23) is adjusted so that the pressure difference ΔP1 becomes larger than a predetermined target value.
摘要:
For cooling operation, a refrigeration apparatus (20) includes a heat-source-side valve opening control means (53) for controlling a degree of opening of a heat-source-side expansion valve (36) so that pressure of a refrigerant flowing into the utilization-side expansion valve (51) in the cooling operation becomes equal to or lower than a predetermined reference pressure value. For heating operation, the refrigeration apparatus (20) includes a utilization-side valve opening control means (38, 54) for performing, when a low-quantity utilization unit (61) in which a quantity of the refrigerant falls below a quantity of the refrigerant required for delivering capacity of the utilization unit (61) is found among a plurality of the utilization units (61) in the heating operation, valve opening reducing operation of reducing a degree of opening of the utilization-side expansion valve (51) of the utilization unit (61) except for the low-quantity utilization unit (61).
摘要:
A time for loading a refrigerant is shortened when a utilization unit of an air conditioner is installed. A heat source unit 1 includes a compressor 100; a heat-source-side heat exchanger 200; a refrigerant regulator 61 storing a refrigerant; an introducing pipe 62 which is a pipe that is branched off from a discharge-side pipe 110 of the compressor 100 and connected to the refrigerant regulator 61, and introduces the refrigerant discharged from the compressor 100 into the refrigerant regulator 61; and a lead-out pipe 63 which is a pipe that is connected from the refrigerant regulator 61 to an intake-side pipe 120 of the compressor 100, and leads out the refrigerant stored in the refrigerant regulator 61 into the intake-side pipe 120.
摘要:
The present invention provides an oil equalizing circuit that can improve the reliability of the oil supply to the compression mechanisms in a refrigeration system provided with a plurality of compression mechanisms. The compressor group of the air conditioning system is equipped chiefly with first, second, and third compressors and an oil equalizing circuit. The oil equalizing circuit is equipped with the first, second and third oil separators provided on the discharge sides of the compressors; first, second, and third oil return pipes connecting the oil separators to the intake sides of the compressors; a communication pipe for allowing the oil return pipes to communicate with one another; first, second, and third oil ON-OFF switching mechanisms provided downstream of the parts where the oil return pipes connect to the communication pipe; and first, second, and third pressure reducing mechanisms provided upstream of the parts where the oil return pipes connect to the communication pipe.
摘要:
A magnetic recording medium having a magnetic film formed on a substrate directly or through an underlayer from an alloy containing Co as a principal component. The central line average surface roughness Ra and maximum surface roughness Rmax of the magnetic film in a direction perpendicular to the direction of magnetic recording are selected so as to fall within the ranges of 1 nm.ltoreq.Ra.ltoreq.20 nm and Rmax.ltoreq.25 Ra, respectively, and the in-plane magnetic anisotropy energy Ku of the magnetic film is selected to fall within the range of 0.ltoreq.Ku.ltoreq.8.times.10.sup.5 erg/cm.sup.3. Thus, it is possible to minimize the value of modulation which represents the degree of variation of read output on the same circumference of a magnetic disk. It is also possible to reduce the noise generated in read and write operations by forming the magnetic film so as have no crystallographic orientation.
摘要:
This invention provides a sample analyzing device and sample analyzing method designed to suppress nonuniform capture of magnetic particles (10) and detect a desired substance with higher accuracy. The sample analyzing device includes a flow channel (15) that conducts thereinto a sample which contains the magnetic particles (10), and magnetic field generating means (12) that generates magnetic fields for capturing the magnetic particles (10) in a magnetic particles capturing region of the flow channel (15); wherein the flow channel has at least one of structural characteristics that a cross-sectional area of the flow channel, at a downstream end of the magnetic particles capturing region, is larger than a cross-sectional area of the flow channel, at an upstream end of the magnetic particles capturing region, and that the magnetic fields generated by the magnetic field generating means (12) have a greater magnitude at a downstream side of the magnetic particles capturing region than at an upstream side thereof.
摘要:
A time for loading a refrigerant is shortened when a utilization unit of an air conditioner is installed. A heat source unit 1 includes a compressor 100; a heat-source-side heat exchanger 200; a refrigerant regulator 61 storing a refrigerant; an introducing pipe 62 which is a pipe that is branched off from a discharge-side pipe 110 of the compressor 100 and connected to the refrigerant regulator 61, and introduces the refrigerant discharged from the compressor 100 into the refrigerant regulator 61; and a lead-out pipe 63 which is a pipe that is connected from the refrigerant regulator 61 to an intake-side pipe 120 of the compressor 100, and leads out the refrigerant stored in the refrigerant regulator 61 into the intake-side pipe 120.
摘要:
An air conditioner is configured by appropriating existing refrigerant pipes of an existing air conditioner to update indoor units and an outdoor unit of a refrigerant circuit of the existing air conditioner. The air conditioner is disposed with an updated refrigerant circuit and a mixer disposed in the updated refrigerant circuit. The updated refrigerant circuit is filled with working refrigerant and refrigerating machine oil that include an acid trapping agent that detoxifies acid components remaining in the refrigerant pipes. The mixer mixes the acid components with the acid trapping agent during refrigeration cycle operation of the updated refrigerant circuit.
摘要:
A magnetic disk medium in which texture working is performed on surfaces of a substrate or on surfaces of subbing films provided on the substrate to attain circumferential worked-traces so that the contact start stop area thereof is different from the recording/reproducing area thereof in roughness of the worked surfaces.