Compressor and air-conditioning device, using it
SUBSTANCE: air conditioner with compressor uses R32 refrigerant. It contains the compressor for the refrigerant compressing; the external heat exchanger; the internal heat exchanger; and the expansion valve for reducing the refrigerant pressure, at that the refrigerant is formed from hydrofluorocarbon (HFC); the compressor comprises the compressor unit for compressing the refrigerant, the electric motor unit to transmit the rotational force to the compressor unit through the rotating shaft, connected to the compressor unit and the compressor oil storage section for containing the compressor oil in order to reduce the friction between the rotating shaft and the compressor unit and to reduce the compressor temperature; and the oil contains the carbon nanoparticle, wherein the compressor oil volume is about 35-45% of the effective volume of the compressor interior part, at that the effective volume is the volume, obtained by subtracting the volume of the motor unit and the compressor unit from the total volume of the compressor.
EFFECT: increase of the compressor reliability and efficiency, when using the refrigerant, based on HFC.
13 cl, 15 dwg
FIELD: engines and pumps.
SUBSTANCE: sensor of current supplied with the generator to the refrigerating plant is installed in the generator. Control is performed in compliance with the data from the measuring sensor and provides for reduction of the drive speed to lower speed when the value of current supplied to the refrigerating plant turns out to be lower than the pre-determined upper value. Provision is made for blocking of those functions of the system at the measured current value caused with a transient process or at the medium temperature above the pre-determined threshold value.
EFFECT: use of the invention will allow reducing the engine fuel consumption.
13 cl, 5 dwg
SUBSTANCE: disclosed is a method of calibrating an overheating sensor (5) for a refrigeration system, according to which: the amount of liquid coolant in the evaporator (1) is increased, for example, by increasing the degree of opening of the control valve (3); at least one parameter, for example, temperature of the coolant coming out of the evaporator (1), is monitored, from which the overheating value of the coolant can be determined; the possibility of reducing said parameter is provided; when the value of the monitored parameter is set at an essentially constant level, the corresponding overheating (SH) value is taken as zero; the overheating sensor (5) is calibrated in accordance with said level at which the overheating value (SH) is equal to zero. A constant level of the value of said parameter indicates that the liquid coolant can pass through the evaporator (1) and, consequently, the overheating value of the coolant at the outlet of the evaporator (1) is equal to zero.
EFFECT: disclosed method enables to calibrate an overheating sensor at the operating site of the refrigeration system, owing to which there is no need to calibrate said sensor at the manufacturing plant and, as a result, the need to monitor conformity of calibration data of a particular sensor.
11 cl, 10 dwg
SUBSTANCE: invention refers to refrigerating equipment. cooling method of a sealed unit of a compression refrigerator involves moistening of a condenser surface. The condenser surface and the compressor housing surface is sprinkled with an air-and-water mixture with further blowing; activation/deactivation of the condenser and/or compressor surface blowing is performed by a controller based on measured temperature values of the unit components.
EFFECT: increasing cooling intensity of compressor and condenser surfaces.
SUBSTANCE: turbo-compressor of a refrigerating unit includes a working stage arranged in the housing, a multiplying gear, the drive gear of which is installed on a drive shaft and is engaged with a driven gear installed on the rotor shaft of a working hub. Inner cavity of the multiplying gear is interconnected with an oil tank frame; the working stage housing is connected to suction and discharge pipelines of a gas system of the refrigerating unit, and the oil tank frame is interconnected with a suction pipeline. The inner cavity of the multiplying gear is interconnected with the suction pipeline through a balancing line equipped with shutoff valves, which are in open position at non-working state of the turbo-compressor and in closed (at start-up) and working state of the turbo-compressor. As per the second version, the turbo-compressor of the refrigerating unit includes at least two working stages, each of which is arranged in the corresponding housing.
EFFECT: providing protection of working stages and gas system of an ice generating unit as a whole against penetration of oil to them from the oil tank frame during preparation of the turbo-compressor for start-up and total oil losses at its operation; improving reliability and service life of the device.
6 cl, 1 dwg
SUBSTANCE: compressor (2) of cooling circuit includes inlet channel (6), compression element (10), outlet channel (18) in which flow (20) of gaseous cooling agent, which transfers some amount of oil, circulates during operation through inlet channel (6), compression element (10) and outlet channel (18), and oil collector (8) in which some amount of oil transferred with gaseous cooling agent is collected. Element (16) is provided for increasing the oil circulation rate, which is provided with possibility of oil transfer from oil collector (8) to cooling agent flow (20) when oil in oil collector (8) exceeds the specified oil level (24) in oil collector. Element for increasing the oil circulation rate is formed by means of bypass line (46, 54) passing between oil collector (8), essentially at the height of the specified oil level (24) in oil collector and cooling agent flow (20) in the position before compression element (10) inside or outside the compressor housing.
EFFECT: use of the invention will allow reliable and failure-free operation of refrigerating systems owing to improving the compressor reliability.
18 cl, 9 dwg
FIELD: machine building.
SUBSTANCE: circuit (2) of coolant consists of compressor unit (38) of low pressure having outlet (42) of low pressure coolant in sub-circuit (4) of low pressure and compressor unit (8) of high pressure having inlet (12) of coolant of high pressure in sub-circuit (6) of high pressure. By fluid medium outlet (42) of coolant of low pressure and inlet (12) of coolant of high pressure are connected to each other. Circuit (2) also has reservoir (56) for oil by means of inlet pipeline (54) for low pressure oil connected with sub-circuit (4) of low pressure for reception of oil in it and connected with sub-circuit (6) of high pressure through outlet (62) of oil. Further, circuit (2) has receiver (22) in sub-circuit (6) of high pressure, discharge line (72) connecting receiver (22) with reservoir (56) for oil and delivery valve (74) in discharge line (72).
EFFECT: increased operational reliability.
16 cl, 4 dwg
FIELD: engines and pumps.
SUBSTANCE: proposed sealed electrical compressor 1 has normally-open pressure switch 7 and fuse 6. Said pressure switch 7 is arranged in tight casing 2 connected in parallel with main winding 3A of motor 3 and short-circuits main winding 3A at excess pressure of coolant in tight casing 2. Fuse 6 is connected in series with main winding 3A and auxiliary winding 3B of motor 3 to interrupt current flow to said motor at over current that originates when pressure switch 7 short-circuits main winding 3A.
EFFECT: protection of element an engine operated at high pressure.
6 cl, 8 dwg
FIELD: food industry.
SUBSTANCE: invention relates to refrigerating engineering and can be used in food industry, in agroindustrial complex and farming enterprises. Milk ice plant contains reservoir with outer low-conductivity coat, gear motor, mixer and freezer built in reservoir as well as air-cooling compression-condensation refrigerating apparatus connected to the freezer by pressure and absorbing sides. Blast-heating container is a part of compression-condensation refrigerating apparatus. It is situated over the compressor. It has corkscrew tubing battery, water spherical valve and detachable plate. Compressor output hole is connected to condenser input hole through corkscrew tubing battery of blast-heating container. Water spherical valve is placed over blast-heating container.
EFFECT: invention allows to reduce operational costs and device value.
FIELD: mechanics, heating.
SUBSTANCE: proposed gas compressor incorporates a gas inlet and a gas outlet, a gas compressor drive, a recycle pressure relief device communicating with the gas outlet and designed to receive a compressed gas flow and opening when the said gas outlet discharge pressure reaches the preset value. It also comprises piping communicating with the said gas inlet and the recycle pressure relief device designed to feed compressed air into the compressed air inlet when the discharge pressure reached the preset value thus increasing the flow mass velocity in the compressor and, at the same time, adjusting the drive. The said drive decelerates with the compressor power demand exceeds the drive maximum output and cuts out at low rpm.
EFFECT: reduced chimney fire in production of liquefied natural gas at rated load.
23 cl, 4 dwg
FIELD: air conditioning or ventilation.
SUBSTANCE: device comprises a number of high-pressure compressors provided with housings filled with oil. The excess of oil in the compressors is collected in an accumulating tank through the pipes for balancing oil. The oil is supplied to the compressor from the collecting tank. The coolant is supplied to the collecting tank from the compressors through the by-pass.
EFFECT: simplified structure.
14 cl, 4 dwg
FIELD: compressor arrangements.
SUBSTANCE: turbine compressor has pressure-tight tank provided with inner space and individual inlet ports from both sides. The fist socket of the bearing and the second socket of the bearing are mounted from the left and right sides of the inner space of the pressure-tight tank and are provided with through openings in their central parts. The driving motor is mounted between the first and second sockets of the bearing. The driving shaft whose both ends pass through the through openings in the first and second sockets of the bearing is mounted in block with the driving motor. The sealing member which is inserted with the use of the driving shaft is secured to the first socket of the bearing. The radial bearing means is interposed between the driving shaft and first socket of the bearing between the driving shaft and the second socket of the bearing. The first working wheel is secured to one end of the driving shaft. The second working wheel is secured to the other end of the driving shaft. The first diffuser is secured to the sealing member. The second diffuser is secured to the second socket of the bushing. The connecting pipe is used for connection of the inlet ports. The axial bearing means is interposed between the driving shaft and sealing member.
EFFECT: simplified assembling.
14 cl, 5 dwg
FIELD: refrigerating engineering; designing, manufacture and operation of hermetic compressors.
SUBSTANCE: proposed method includes placing the compressor casing in filler (vibration layer) set in motion by compressor vibrations, thus increasing the convective and conductive components of heat-exchange process and intensifying it and reducing the temperature level of compressor.
EFFECT: extended field of application; reduced power losses; improved noise characteristics.
FIELD: engines and pumps.
SUBSTANCE: method of cold generation, as per which a cooling agent is evaporated subsequently in an evaporator, its pressure is increased in a compressor, cooled and condensed in a condenser. After that, its pressure is decreased and it is returned to the evaporator. Cooling agent pressure is decreased during a periodic process. It involves the following: accumulation of a cooling agent leaving the condenser in a tank before its filling, pumping-out with a compressor of cooling agent vapours from the tank till the pressure is achieved in it, which is equal to pressure in the evaporator, and supply of the rest cooling agent in the tank to the evaporator.
EFFECT: increasing refrigerating factor of refrigerating machines and a conversion factor of heat pumps.
SUBSTANCE: invention relates to the cooling consumer device with the automatic defrosting, in particular, for home use. This cooling device contains internal compartment for food storage, made by thermoformed section, refrigerating chamber with evaporator and fan for air circulation inside the specified internal compartment. This device contains passage for the cooling air supply by fan to the specified cooling consumer device. Specified passage is provided during thermal forming of the specified thermoformed section. Plate is connected with the thermoformed section to close passage and contains pair of parallel branches passing insides the passage. The sealing elements are made out of sponge material, and are located in the passage, they are installed between the thermoformed section and plate branches to prevent the cooling air leaks. Also, manufacturing method of the cooling consumer device is described.
EFFECT: group of inventions increases efficiency and economic feasibility of the cooling consumer device.
11 cl, 3 dwg