WO2014035133A1 - Chambre de réception à volume variable pour cycle de congélation, cycle de congélation comportant la chambre de réception variable pour cycle de congélation et son procédé de commande - Google Patents

Chambre de réception à volume variable pour cycle de congélation, cycle de congélation comportant la chambre de réception variable pour cycle de congélation et son procédé de commande Download PDF

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Publication number
WO2014035133A1
WO2014035133A1 PCT/KR2013/007716 KR2013007716W WO2014035133A1 WO 2014035133 A1 WO2014035133 A1 WO 2014035133A1 KR 2013007716 W KR2013007716 W KR 2013007716W WO 2014035133 A1 WO2014035133 A1 WO 2014035133A1
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WIPO (PCT)
Prior art keywords
refrigerant
volume
pressure
variable volume
receiver
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PCT/KR2013/007716
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English (en)
Korean (ko)
Inventor
백영진
김민성
장기창
이영수
나호상
Original Assignee
한국에너지기술연구원
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Application filed by 한국에너지기술연구원 filed Critical 한국에너지기술연구원
Priority to US14/419,947 priority Critical patent/US20150204590A1/en
Publication of WO2014035133A1 publication Critical patent/WO2014035133A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/02—Subcoolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/16—Receivers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/195—Pressures of the condenser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2116—Temperatures of a condenser
    • F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet of the condenser

Definitions

  • the present invention relates to a variable volume receiver for a refrigeration cycle, a refrigeration cycle including the same, and a control method thereof, and more particularly, a refrigeration cycle capable of optimal operation by varying the volume of the receiver according to operating conditions to secure an appropriate subcooling degree.
  • the present invention relates to a variable volume receiver for a refrigeration cycle, and a control method thereof.
  • the appropriate amount of refrigerant required for driving the cycle also changes.
  • the charge amount of the refrigerant is determined based on the case where the required amount is large, and when the excess amount is generated during operation, the refrigerant charge amount is stored in the receiver.
  • the receiver plays a role of allowing the cycle to be stably operated under various conditions.
  • the storage space is predetermined, the receiver is selected to have room.
  • the refrigeration cycle has an optimum degree of superheat and optimum degree of subcooling, respectively, to maximize performance under given conditions.
  • the superheat can be controlled using an electronic expansion valve or the like, but the supercooling degree which is affected by the amount of refrigerant charge is generally not controlled.
  • the supercooling degree cannot be actively controlled due to the free space of the receiver, and thus there is a problem in that the operation in the optimum supercooling state that can maximize the performance of the cycle cannot be guaranteed.
  • the prior patent JP 2550632 increases or decreases the volume of the refrigerant storage space inside the receiver by directly using the refrigerant circulating the refrigerating cycle, but when using the refrigerant discharged from the compressor, a control operation for reducing the volume of the variable capacitor is smooth.
  • the control operation for increasing the volume of the variable capacitor is not smooth, and since the refrigerant circulating the refrigeration cycle is directly used, the refrigeration capacity may decrease.
  • An object of the present invention is to control the amount of refrigerant that can be stored in accordance with the operating conditions to actively control the supercooling degree of the cycle, the variable volume receiver for a refrigeration cycle that can be operated optimally, a refrigeration cycle comprising the same and It relates to a control method thereof.
  • a variable volume receiver for a refrigeration cycle includes a receiver tank connected to a refrigerant passage and forming a refrigerant storage space in which a refrigerant passing through the refrigerant passage is temporarily stored, and provided in the receiver tank and being contracted or expanded.
  • a variable volume that reduces or increases the volume of the refrigerant storage space, and is installed separately from the refrigerant passage, and in communication with the variable volume and sealed to the outside, the fluid filled therein of the compressor outlet refrigerant of the refrigeration cycle
  • a pressure controller configured to adjust the pressure inside the variable volume body by receiving heat, and control the pressure controller according to an operating condition to change the volume of the refrigerant storage space to determine the amount of refrigerant that can be stored in the refrigerant storage space. It includes a control unit for controlling.
  • a variable volume receiver for a refrigeration cycle, comprising: a receiver tank connected to a refrigerant passage and forming a refrigerant storage space in which a refrigerant passing through the refrigerant passage is temporarily stored; A piston coupled to the receiver tank so as to linearly reciprocate, thereby reducing or increasing a volume of the refrigerant storage space while linearly reciprocating; A linear movement mechanism for linearly reciprocating the piston; And a controller for controlling the amount of refrigerant that can be stored in the refrigerant storage space by changing the volume of the refrigerant storage space by controlling the linear movement mechanism according to an operating condition.
  • the refrigeration cycle in the refrigerating cycle including a compressor, a condenser, an expansion mechanism, an evaporator and a control unit, the refrigeration cycle is installed on a refrigerant passage connecting the condenser and the expansion mechanism, and the condenser outlet refrigerant is temporarily stored.
  • a variable volume receiver partitioned by a refrigerant storage unit and a volume adjusting unit installed separately from the refrigerant passage and contracted or expanded by an externally sealed pressure regulator to adjust the volume of the refrigerant storage unit.
  • the refrigeration cycle in a refrigeration cycle including a compressor, a condenser, an expansion mechanism, an evaporator and a control unit, the refrigeration cycle is installed on a refrigerant passage connecting the condenser and the expansion mechanism, A receiver tank forming a temporarily stored refrigerant storage space, a variable volume provided in the receiver tank and shrinking or expanding to reduce or increase a volume of the refrigerant storage space, and a variable volume installed separately from the refrigerant flow path.
  • variable volume receiver in communication with and sealed to the outside, wherein the fluid filled therein receives a heat of the compressor outlet refrigerant to adjust a pressure inside the variable volume
  • control unit includes: And calculating the subcooling degree according to the temperature and pressure of the condenser outlet refrigerant, and calculating the subcooling degree. La and controls parts of the pressure control.
  • a refrigerant storage space connected to the refrigerant passage and temporarily storing the refrigerant passing through the refrigerant passage
  • Variable volume consisting of a receiver tank for forming a straight line, a piston coupled to the receiver tank so as to be capable of linear reciprocation, reducing or increasing the volume of the refrigerant storage space while linear reciprocating, and a linear moving mechanism for linearly reciprocating the piston.
  • a receiver further includes, The control unit calculates the subcooling degree according to the temperature and pressure of the condenser outlet refrigerant, and controls the linear movement mechanism in accordance with the calculated subcooling degree.
  • the subcooling degree calculating step of measuring the temperature and pressure of the condenser outlet refrigerant, the subcooling degree is calculated, and the volume control unit of the variable volume receiver in accordance with the calculated subcooling degree
  • a volume control step of increasing and decreasing the volume of the refrigerant storage unit of the variable volume receiver by receiving the heat of the compressor outlet refrigerant, and the volume control step if the calculated subcooling degree is greater than or equal to a preset subcooling degree, Blocking the transfer of the heat of the compressor outlet refrigerant to the fluid charged in the controller, thereby reducing the pressure in the volume controller and increasing the volume of the refrigerant reservoir, and the calculated subcooling degree being pre-set. If less, the fluid charged in the volume control unit receives heat from the compressor outlet refrigerant and the sieve Increasing the pressure in the control unit and includes a process of reducing the volume of the coolant reservoir portion.
  • variable volume receiver for a refrigeration cycle it is possible to adjust the capacity to store the refrigerant in accordance with the change of operating conditions such as the outside temperature or the load-side temperature, to ensure the appropriate supercooling degree even if the operating conditions change Therefore, there is an advantage that the optimum operation is always possible regardless of the ambient temperature and the load side temperature change.
  • variable volume receiver for the refrigeration cycle of the present invention is configured to expand the variable volume by increasing the fluid pressure of the pressure regulating tube by using the heat of the high temperature refrigerant discharged from the compressor.
  • variable volume receiver for the refrigerating cycle of the present invention uses a separate fluid instead of a refrigerant circulating the refrigerating cycle when shrinking or expanding the variable volume, the refrigerant discharged from the compressor is transferred to the entire condenser without loss. There is an advantage that can be introduced.
  • FIG. 1 is a view showing a state in which the volume of the refrigerant storage unit is increased in the refrigeration cycle according to the first embodiment of the present invention.
  • FIG. 2 is a view showing a state in which the volume of the refrigerant storage unit is reduced in the refrigeration cycle shown in FIG.
  • FIGS. 1 and 2 are views illustrating the operation of the heat exchanger illustrated in FIGS. 1 and 2.
  • FIG. 4 is a control block diagram of the refrigeration cycle shown in FIG.
  • FIG. 5 is a control flowchart of the refrigeration cycle shown in FIG.
  • FIG. 6 is a view showing the operation of the heat exchanger according to the second embodiment of the present invention.
  • FIG. 7 is a view showing a state in which the volume of the refrigerant storage unit is increased in the refrigeration cycle according to the third embodiment of the present invention.
  • FIG. 8 is a view showing a state in which the volume of the refrigerant storage unit is reduced in the refrigeration cycle shown in FIG.
  • FIG. 9 is a control block diagram of the refrigeration cycle shown in FIG.
  • FIG. 10 is a view showing a modification of the variable volume receiver shown in FIG. 7.
  • FIG. 11 is a view showing a state in which the volume of the refrigerant storage unit is reduced in the refrigeration cycle according to the fifth embodiment of the present invention.
  • FIG. 12 is a view illustrating a state in which the volume of the refrigerant storage unit is increased in the refrigeration cycle shown in FIG. 11.
  • FIG. 1 is a view showing a state in which the volume of the refrigerant storage unit is increased in the refrigeration cycle according to the first embodiment of the present invention.
  • 2 is a view showing a state in which the volume of the refrigerant storage unit is reduced in the refrigeration cycle shown in FIG. 3 is a view illustrating the operation of the heat exchanger illustrated in FIGS. 1 and 2.
  • 4 is a control block diagram of the refrigeration cycle shown in FIG.
  • the refrigeration cycle according to the first embodiment of the present invention, the compressor 2, the condenser 4, the variable volume receiver 10, expansion valve 8, evaporator 6 Include.
  • the variable volume receiver 10 is installed on a refrigerant passage connecting the condenser 4 and the expansion valve 8.
  • the variable volume receiver 10 includes a receiver tank forming a refrigerant storage unit 12 in which the outlet refrigerant of the condenser 4 is temporarily stored, and a variable volume 14 provided in the receiver tank and contracted or expanded. And a pressure regulator for controlling the pressure of the fluid filled in the pressure regulator tube 20 to be described later in order to contract or expand the variable volume 14.
  • the receiver tank is connected to the refrigerant passage, and temporarily stores the liquid refrigerant from the condenser 4 and sends it to the expansion valve 8.
  • the variable volume 14 is a bladder that is a synthetic rubber bag with good elasticity is used, it is connected to the pressure control tube (20).
  • the variable volume 14 expands when the pressure of the fluid in the pressure control tube 20 increases, and contracts when the pressure of the fluid in the pressure control tube 20 decreases.
  • the variable volume 14 is contracted, the portion occupied by the variable volume 14 in the receiver tank is reduced to increase the volume of the refrigerant storage 12.
  • the variable volume 14 is expanded, the portion occupied by the variable volume 14 in the receiver tank increases, thereby reducing the volume of the refrigerant storage 12.
  • the pressure regulator is provided separately from the refrigerant passage.
  • the pressure regulator communicates with the variable volume 14 and is closed to the outside.
  • the pressure control unit controls the pressure of the variable volume 14 while the fluid filled therein is evaporated and expanded by receiving the heat of the refrigerant exiting the compressor 2.
  • the pressure adjusting unit may include a heat exchanger 40 installed at the discharge side of the compressor 2 and a pressure control tube 20 for transmitting the pressure of the fluid in the heat exchanger tube 21 to be described later to the variable volume 14. Include.
  • the fluid may be the same as the refrigerant circulating in the refrigerating cycle, or a volume expansion coefficient larger than that of the refrigerant may be used. When the volume expansion coefficient of the fluid is large, since the fluid is well contracted or expanded by heat exchange, it may be well contracted or expanded of the variable volume 14 filled with the fluid.
  • the heat exchanger 40 includes a discharge pipe 41 of the compressor 2, the pressure control tube 20, a linear moving mechanism. In the heat exchange part 40, heat exchange is performed between the discharge pipe 41 and the pressure control pipe 20.
  • the discharge pipe 41 of the compressor 2 is provided to pass through the heat exchange part 40.
  • the refrigerant compressed by the high temperature and high pressure in the compressor 2 passes through the discharge pipe 41 of the compressor 2.
  • the pressure control tube 20 is composed of a heat exchange tube 21 and a capillary tube 22.
  • the pressure regulating tube 20 is formed of the capillary tube 22 in the entire section except for the portion connected to the discharge pipe 41 of the compressor 2 and the portion communicating with the variable volume 14.
  • the capillary tube 22 speeds up the pressure transfer rate, and the pressure control tube 20 has an abnormal state, that is, a state in which both a liquid fluid and a gaseous fluid exist.
  • the liquid fluid is collected on the heat exchange tube 21 side, and when the liquid is in contact with the discharge pipe 41, the heat is transferred from the hot refrigerant flowing through the discharge pipe 41 to evaporate and expand.
  • the linear movement mechanism adjusts the distance between the heat exchange pipe 21 and the compressor 2 to the discharge pipe 41.
  • the linear movement mechanism moves linearly in the direction in which the heat exchange tube 21 is in contact with or separated from the discharge pipe 41 of the compressor 2.
  • the linear movement mechanism includes a rack 24 coupled to the heat exchange tube 21, a pinion 26 engaged with the rack, and a motor 28 for rotating the pinion 26.
  • the rack 24 is coupled to one side of the heat exchanger tube 21 to linearly move when the pinion 26 is rotated by the driving of the motor 28.
  • the rack 24 is coupled to the heat exchange tube 21 in the present embodiment, for example, but is not limited thereto.
  • the pinion 26 may be coupled to the heat exchange tube 21.
  • the position of the discharge pipe 41 is fixed and the heat exchange pipe 21 is linearly moved, for example, but not limited thereto, and the position of the heat exchange pipe 21 is fixed, It is also possible to linearly move the discharge pipe 41, and of course, it is also possible to linearly move both the heat exchange pipe 21 and the discharge pipe 41.
  • the motor 28 is a motor capable of bidirectional rotation, the rotation direction is changed according to the signal of the control unit 60.
  • the refrigeration cycle further includes a temperature sensor 31 for measuring the temperature T of the outlet refrigerant of the condenser 4 and a pressure sensor 32 for measuring the pressure P of the outlet refrigerant of the condenser 4. do.
  • the control unit 60 calculates the subcooling degree according to the values detected from the temperature sensor 31 and the pressure sensor 32, compares the calculated subcooling degree with a preset subcooling range, and accordingly To control operation.
  • the control unit 60 controls the operation of the motor 28 in accordance with the degree of supercooling, but is not limited thereto, but the present invention is not limited thereto. It is of course also possible to adjust the volume of the variable volume receiver 10 by controlling its operation.
  • the temperature T and the pressure P of the outlet refrigerant of the condenser 4 are measured.
  • the temperature sensor 31 measures the temperature T of the outlet refrigerant of the condenser 4.
  • the pressure sensor 32 measures the pressure P of the outlet refrigerant of the condenser 4.
  • the saturation temperature Tsat of the refrigerant can be known from the pressure P of the refrigerant measured by the pressure sensor 32.
  • the subcooling degree may be calculated by calculating a difference between the saturation temperature Tsat of the refrigerant and the measured temperature T. (S3) The calculated subcooling value is compared with a preset subcooling value. (S4) When the two values are different from each other, the pressure adjusting unit is controlled to contract or expand the variable volume 14, thereby decreasing or increasing the volume of the refrigerant storage unit 12.
  • the refrigerant storage unit ( 12) The change in volume, except for the amount of refrigerant stored in the variable volume receiver 10, the compressor (2), the condenser (4), the expansion valve (8), the evaporator (6) and their connection
  • the actual charge amount of the cycle defined as the sum of the amount of refrigerant charged in the pipe is changed, which in turn leads to a change in the supercooling degree, and thus the subcooling degree can be controlled through the control of the pressure adjusting unit.
  • the volume of the variable volume 14 in the variable volume receiver 10 is reduced, and the volume of the refrigerant storage 12 is increased to increase the amount of refrigerant stored in the refrigerant storage 12.
  • the discharge pipe 41 and the heat exchange tube 21 of the compressor 2 in the heat exchange unit 40 are spaced apart from each other to prevent heat exchange.
  • the motor 28 is rotated clockwise, the rack 24 is reversed, and the heat exchange tube 21 is spaced apart from the discharge pipe 41.
  • the fluid in the heat exchange tube 21 does not receive heat from the discharge pipe 41, and the fluid in the pressure control tube 20 is reduced. Will maintain the room temperature. At room temperature, the fluid is a two-phase fluid mixed with a liquid phase and a gaseous phase.
  • variable volume 14 Since the pressure is lower than that of the condenser outlet refrigerant, the pressure inside the variable volume 14 is also reduced, so that the variable volume 14 contracts. do.
  • the volume of the refrigerant storage unit 12 is relatively increased, so that the amount of refrigerant that can be stored in the variable volume receiver 10 is increased.
  • the amount of refrigerant stored in the variable volume receiver 10 increases, the actual amount of charge in the refrigeration cycle is reduced, and the amount of refrigerant inside the condenser 4 is also reduced. Therefore, the subcooling degree of the refrigerant is reduced, so that it is adjusted to the preset subcooling range.
  • the volume of the variable volume 14 in the variable volume receiver 10 is increased, and the volume of the refrigerant storage 12 is reduced, thereby reducing the amount of refrigerant stored in the refrigerant storage 12.
  • the discharge pipe 41 and the heat exchange tube 21 of the compressor 2 in the heat exchange unit 40 contact each other to allow heat exchange.
  • the motor 28 is rotated counterclockwise, the rack 24 is advanced, and the heat exchange tube 21 is advanced toward the discharge pipe 41 to be in contact with each other.
  • the heat exchange tube 21 and the discharge pipe 41 is in contact, the fluid in the heat exchange tube 21 receives heat from a high temperature refrigerant passing through the discharge pipe 41.
  • the temperature of the fluid in the pressure control pipe 20 rises and the liquid fluid evaporates, so that the ratio of the gaseous fluid increases.
  • variable volume 14 When the variable volume 14 is inflated to increase the volume, the volume of the refrigerant storage 12 is relatively reduced. When the volume of the refrigerant storage unit 12 decreases, so that the amount of refrigerant that can be stored in the variable volume receiver 10 decreases, the actual charge amount increases, and the amount of the refrigerant inside the condenser 4 increases. As a result, the supercooling degree of the refrigerant is increased.
  • the volume of the refrigerant storage unit 12 can be reduced or increased, thereby adjusting the supercooling degree of the refrigerant to a predetermined range.
  • FIG. 6 is a view showing the operation of the heat exchanger according to the second embodiment of the present invention.
  • the heat exchange part according to the second embodiment of the present invention may include a seat 50 that linearly reciprocates between the discharge pipe 41 and the heat exchange pipe 21 of the compressor 2. It differs from 1st Example, and demonstrates it centering around a different point.
  • the sheet 50 may be a heat insulating sheet which insulates between the discharge pipe 41 and the heat exchange pipe 21, and transfers heat of the discharge pipe 41 to the heat exchange pipe 21. It is also possible. In the present embodiment, the sheet 50 is described as an insulating sheet to insulate between the discharge pipe 41 and the heat exchange pipe 21.
  • the heat exchange part further includes a linear movement mechanism for linearly reciprocating the sheet 50 between the discharge pipe 41 and the heat exchange pipe 21.
  • the linear movement mechanism includes a rack 51 integrally formed with the seat 50 or coupled to the seat 50, a pinion 42 engaged with the rack 51, and the pinion 42. And a motor 53 for rotating.
  • the present invention is not limited thereto, and the pinion 42 may be coupled to the rack 51.
  • the motor 53 is rotated counterclockwise.
  • the sheet 50 is moved downward.
  • the heat exchange tube 21 is provided to have elasticity in the direction toward the discharge pipe 41, and the heat exchange tube 21 and the discharge pipe 41 are in contact with each other to perform heat exchange.
  • the fluid in the heat exchange tube 21 receives heat from the discharge pipe 41 to evaporate and expand, thereby expanding the variable volume 14.
  • FIG. 7 is a view showing a state in which the volume of the refrigerant storage unit is increased in the refrigeration cycle according to the third embodiment of the present invention.
  • 8 is a view showing a state in which the volume of the refrigerant storage unit is reduced in the refrigeration cycle shown in FIG. 9 is a control block diagram of the refrigeration cycle shown in FIG.
  • the refrigerating cycle according to the third embodiment of the present invention further includes a refrigerant bypass flow path 110, a bypass valve 112, a heat exchange part 100, and a pressure control tube 20. Include.
  • the bypass flow path 110 bypasses the refrigerant from the discharge pipe of the compressor 2 to the heat exchange part 100 side.
  • a check valve 116 is installed at the outlet side of the bypass flow path 110.
  • the discharge pipe of the compressor 2 is provided with a flow control valve 114 for opening and closing the flow path.
  • heat exchange is performed between the refrigerant bypassed to the bypass flow path 110 and the heat exchange tube 21 of the pressure control tube 20.
  • the control unit 120 calculates the supercooling degree according to the temperature and pressure sensed by the temperature sensor 31 and the pressure sensor 32, compares the calculated subcooling degree with a preset subcooling and accordingly the bypass valve. 112 and the flow control valve 114.
  • the subcooling degree calculated according to the temperature and pressure sensed by the temperature sensor 31 and the pressure sensor 32 is greater than or equal to a preset subcooling degree, it is determined that the actual filling amount in the cycle is larger than the optimum filling amount.
  • the volume of the refrigerant storage portion 12 of the variable volume receiver 10 is increased.
  • the controller 120 closes the bypass valve 112 and opens the flow control valve 114 so that the refrigerant discharged from the compressor 2 is not bypassed to the bypass flow path 110. . Therefore, since the heat of the high temperature refrigerant discharged from the compressor 2 is not transferred to the fluid in the heat exchange tube 21, the fluid in the pressure control tube 20 maintains a normal temperature state. At room temperature, the fluid is a two-phase fluid mixed with a liquid phase and a gaseous phase. Since the pressure is lower than that of the condenser outlet refrigerant, the pressure inside the variable volume 14 is also reduced, so that the variable volume 14 contracts. do.
  • variable volume 14 When the variable volume 14 is contracted, the volume of the refrigerant storage unit 12 is relatively increased, so that the amount of refrigerant that can be stored in the variable volume receiver 10 is increased. As the amount of refrigerant stored in the variable volume receiver 10 increases, the actual amount of charge in the refrigeration cycle is reduced, and the amount of refrigerant inside the condenser 4 is also reduced. Thus, the supercooling degree of the refrigerant is reduced.
  • the subcooling degree of the coolant may be reduced as described above to match the preset subcooling degree.
  • the calculated subcooling degree is less than the preset subcooling degree, it is determined that the actual filling amount is insufficient compared to the optimum filling amount and the volume of the refrigerant storage unit 12 of the variable volume receiver 10 is reduced.
  • the control unit 120 opens the bypass valve 112 and closes the flow control valve 114.
  • the refrigerant discharged from the compressor 2 is bypassed to the bypass flow path 110 so that heat of the high temperature refrigerant discharged from the compressor 2 is transferred to the fluid.
  • the temperature of the fluid in the pressure control pipe 20 is increased, the liquid phase fluid evaporates, the ratio of the gaseous fluid is increased.
  • the temperature and pressure inside the pressure control tube 20 increases, and the pressure inside the variable volume 14 also rises, thereby expanding the variable volume 14.
  • the variable volume 14 is inflated to increase the volume, the volume of the refrigerant storage 12 is relatively reduced.
  • the volume of the refrigerant storage unit 12 decreases, so that the amount of refrigerant that can be stored in the variable volume receiver 10 decreases, the actual charge amount increases, and the amount of the refrigerant inside the condenser 4 increases. As a result, the supercooling degree of the refrigerant is increased.
  • the subcooling degree of the refrigerant may be increased to match the preset subcooling degree as described above.
  • variable volume type accumulator 150 may be used as the variable volume receiver.
  • a variable volume body 153 which is a synthetic rubber bag, is installed on the upper side of the pressure tank 151, so that the fluid inside the pressure tank 151 and the fluid in the variable volume body 153 It is an isolated structure. As the variable volume 153 contracts or expands, the volume of the internal space 152 of the pressure tank is increased or decreased.
  • the linear movement mechanism includes a magnetic body (not shown) installed in any one of the pressure control pipe 20 and the discharge pipe 41 of the compressor 2, It is different from the third embodiment to include an electromagnet (not shown) installed in the other one, and a power supply unit for applying power to the electromagnet (not shown) according to the signal of the controller 120. Therefore, the control unit 120 controls the distance between the pressure control pipe 20 and the discharge pipe 41 of the compressor 2 by applying or cutting off power to the electromagnet (not shown), so that the compressor The pressure of the fluid in the pressure control tube 20 can be increased or decreased by using the heat of the discharge pipe 41 of (2).
  • FIG. 11 is a view showing a state in which the volume of the refrigerant storage unit is reduced in the refrigeration cycle according to the fifth embodiment of the present invention.
  • FIG. 12 is a view illustrating a state in which the volume of the refrigerant storage unit is increased in the refrigeration cycle shown in FIG. 11.
  • variable volume receiver 200 in the refrigeration cycle according to the fifth embodiment of the present invention, includes a receiver tank, a piston 210, and a linear moving mechanism in which a refrigerant storage unit 201 is formed. .
  • the piston 210 is coupled to the receiver tank so as to linearly reciprocate, and increases or decreases the volume of the refrigerant storage unit 201 while linearly reciprocating.
  • a sealing member is installed between the piston 210 and the receiver tank to prevent leakage of the refrigerant stored in the refrigerant storage unit 201.
  • the linear movement mechanism linearly moves the piston 210.
  • a rack 211 integrally formed or coupled to the rod of the piston 210, a pinion 212 engaged with the rack 211, and a motor 213 for rotating the pinion 212.
  • the volume of the refrigerant storage unit 201 of the variable volume receiver 200 is reduced.
  • the rack 211 moves downward while the piston 210 reduces the volume of the refrigerant storage unit 201.
  • the volume of the refrigerant storage unit 201 is reduced, the amount of refrigerant that can be stored in the refrigerant storage unit 201 is reduced.
  • the amount of the refrigerant that can be stored in the refrigerant storage unit 201 is reduced, the actual charge amount is increased, the amount of the refrigerant inside the condenser 4 is increased, the degree of supercooling of the refrigerant is increased.
  • the subcooling degree of the refrigerant may be increased to match the preset subcooling degree as described above.
  • the calculated subcooling degree is greater than or equal to the preset subcooling degree, it is determined that the actual filling amount is larger than the optimum filling amount and the volume of the refrigerant storage unit 201 of the variable volume receiver 200 is increased.
  • the subcooling degree of the coolant may be reduced as described above to match the preset subcooling degree.
  • variable volume receiver for a refrigeration cycle capable of optimal operation and a refrigeration cycle comprising the same.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Air Conditioning Control Device (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

Selon la présente invention, une chambre de réception variable pour un cycle de congélation peut régler la capacité de stockage d'un fluide frigorigène en fonction des variations des conditions de marche, telles que la température de l'air extérieur ou la température côté charge, et peut assurer un degré approprié de sous-refroidissement, même lorsque les conditions de marche varient, apportant ainsi l'avantage de permettre une commande optique indépendamment des variations de la température de l'air extérieur ou de la température côté charge.
PCT/KR2013/007716 2012-08-30 2013-08-28 Chambre de réception à volume variable pour cycle de congélation, cycle de congélation comportant la chambre de réception variable pour cycle de congélation et son procédé de commande WO2014035133A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/419,947 US20150204590A1 (en) 2012-08-30 2013-08-28 Variable volume receiver for refrigerating cycle, refrigerating cycle comprising the variable receiver, and method for controlling the refrigerating cycle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120095486A KR101368794B1 (ko) 2012-08-30 2012-08-30 냉동 사이클용 가변체적 리시버, 이를 포함하는 냉동 사이클 및 그의 제어방법
KR10-2012-0095486 2012-08-30

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WO2014035133A1 true WO2014035133A1 (fr) 2014-03-06

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Country Status (3)

Country Link
US (1) US20150204590A1 (fr)
KR (1) KR101368794B1 (fr)
WO (1) WO2014035133A1 (fr)

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EP3285026A4 (fr) * 2015-07-15 2018-09-26 Gree Electric Appliances, Inc. of Zhuhai Récipient de stockage de liquide

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DE102014019856B3 (de) 2014-11-25 2021-10-14 Konvekta Ag Verfahren und Vorrichtung zur Überwachung einer Füllmenge eines Kältemittels
CN110375466B (zh) 2018-04-13 2022-10-28 开利公司 用于空气源热泵系统的制冷剂泄露的检测装置和方法
CN111836506A (zh) * 2019-04-17 2020-10-27 鸿富锦精密电子(天津)有限公司 散热装置及应用所述散热装置的散热系统

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KR101368794B1 (ko) 2014-03-03

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