KR101728955B1 - Variable ejector and refrigerant cycle apparatus having the same - Google Patents

Variable ejector and refrigerant cycle apparatus having the same Download PDF

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Publication number
KR101728955B1
KR101728955B1 KR1020150104467A KR20150104467A KR101728955B1 KR 101728955 B1 KR101728955 B1 KR 101728955B1 KR 1020150104467 A KR1020150104467 A KR 1020150104467A KR 20150104467 A KR20150104467 A KR 20150104467A KR 101728955 B1 KR101728955 B1 KR 101728955B1
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South Korea
Prior art keywords
nozzle
needle
driving
gear
actuator
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KR1020150104467A
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Korean (ko)
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KR20170012755A (en
Inventor
김용찬
전용석
차도원
이재준
김선재
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고려대학교 산학협력단
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Priority to KR1020150104467A priority Critical patent/KR101728955B1/en
Publication of KR20170012755A publication Critical patent/KR20170012755A/en
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Publication of KR101728955B1 publication Critical patent/KR101728955B1/en

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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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/08—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/06—Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25B49/022—Compressor control arrangements
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/001—Ejectors not being used as compression device
    • F25B2341/0012—Ejectors with the cooled primary flow at high pressure
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/001—Ejectors not being used as compression device
    • F25B2341/0013—Ejector control arrangements
    • 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
    • F25B2400/23—Separators
    • 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
    • F25B2700/2117—Temperatures of an evaporator

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a variable-type ejector and a refrigeration cycle apparatus having the variable-type ejector. A variable type ejector according to the present invention includes a body and a nozzle provided at an inner side of the body and having a discharge portion for discharging the fluid at a high speed and a nozzle for discharging fluid from one side A mixing unit provided inside the body so as to be connected to the nozzle and the suction unit so that the fluid injected from the nozzle and the fluid sucked from the suction unit are mixed with each other; A needle provided at one end of the nozzle so as to move forward and backward with respect to the discharging part in order to vary the opening amount of the discharging part of the nozzle; And a needle driver connected to the needle so as to move forward and backward relative to the needle.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a variable-type ejector and a refrigerating cycle apparatus having the variable-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ejector, and more particularly, to a variable-type ejector capable of controlling a flow control characteristic of a refrigerant and a refrigeration cycle apparatus having the same.

The refrigeration cycle device is used in various devices for cooling air such as refrigerator, freezer, and air conditioner. Generally, the refrigeration cycle apparatus includes an evaporator in which refrigerant evaporates from the cooling space by evaporating heat, a compressor for raising the temperature and pressure of the refrigerant vapor so as to be condensable and providing the driving force of the refrigerant circulation, a condenser for condensing the high- And an expansion mechanism that adjusts the flow rate of the refrigerant entering the evaporator and lowers the high pressure liquid refrigerant in the refrigerant circulation tube to a saturation pressure corresponding to the required low temperature to allow the refrigerant to evaporate at a desirable low temperature.

However, expansion devices such as a capillary tube, an expansion valve (TXV), and an electronic expansion valve (EEV) used in a conventional refrigeration cycle device cause expansion loss due to friction and vortex during refrigerant flow (isenthalpic expansion). In order to solve the problem of the conventional refrigeration cycle apparatus, a refrigeration cycle apparatus using an ejector instead of an expansion mechanism such as a capillary tube, an expansion valve (TXV), and an electronic expansion valve (EEV) has been proposed. The refrigerant passing through the ejector has the effect of reducing the expansion loss due to the isentropic expansion, reducing the compression ratio due to the pressure increasing effect at the ejector outlet, and increasing the cycle efficiency (COP).

A refrigeration cycle apparatus using such an ejector is disclosed in Korean Patent Registration No. 0918712 (2009.09.22). The refrigeration cycle apparatus disclosed in the above publication includes a compressor for sucking and compressing a refrigerant, a radiator for radiating heat of the high-pressure refrigerant discharged from the compressor, and a radiator for converting the pressure energy of the high- A throttle unit disposed in the branch passage for reducing the pressure of the refrigerant; a throttle unit disposed in the branch passage for reducing the pressure of the refrigerant; and a throttle unit disposed in the branch passage for guiding the flow of refrigerant from the throttle unit to the throttle unit. And an evaporator disposed on the downstream side to evaporate the refrigerant to realize the cooling capability.

In this refrigeration cycle apparatus, the refrigerant flow on the upstream side of the ejector is diverted into a driving flow in which the refrigerant flows into the ejector as the refrigerant circulating flow path and a suction flow which flows into the evaporator as the branching flow path. Therefore, even if the suction performance of the ejector is reduced due to the decrease in the temperature of the outside air, a vapor compression refrigeration cycle using the ejector in which the refrigerant flows through the evaporator is realized. The pressure at the outlet of the ejector is made higher than the pressure of the evaporator by the increased pressure due to the action of the pressure increase of the ejector so that the suction pressure of the compressor is also higher than the pressure at the outlet of the evaporator.

However, the conventional refrigeration cycle apparatus as described above is difficult to apply to an apparatus which operates in various operation modes. For example, the refrigerator is controlled in a small operation mode to match the set temperature of the freezing compartment and the freezing compartment, and the evaporation temperature varies depending on the respective operation mode. For example, in the case of the time division multiple (TDM) cycle control, the R / F mode operation, that is, the evaporation temperature at the time of simultaneously lowering the temperatures of the refrigerating chamber and the freezing chamber is about -19 ° C. and the F mode ) The evaporation temperature during operation is about -28 ° C. As another control method, in the case of the parallel cycle control, the difference between the R mode (operation mode for controlling only the temperature of the refrigerating chamber) and the evaporation temperature of the F mode becomes larger. As described above, the evaporation temperature differs depending on the operation mode, and it is difficult to achieve stable performance improvement with a single-shaped ejector because the number of revolutions of the compressor changes according to the refrigerant load variation.

In addition, the refrigerator frequently changes its operation mode due to frequent opening and closing of doors, increase of refrigeration load due to food, or change of ambient temperature. Therefore, in order to apply the ejector, it is inevitable to use ejectors having different shapes in order to cope with the change of the cycle operation condition due to the switching of the operation mode of the refrigerator. As a result, the manufacturing cost of the refrigeration cycle apparatus becomes high.

Korean Patent Registration No. 0798395 (2008.01.28) Korean Registered Patent No. 0879748 (Jan. 21, 2009) Korean Patent Registration No. 0918712 (September 22, 2009)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above and it is an object of the present invention to provide a variable type ejector and a refrigerating cycle apparatus having the variable type ejector, .

According to an aspect of the present invention, there is provided a variable type ejector including a body, a nozzle provided at an inner side of the body and having a discharge portion for discharging fluid at a high speed, A suction portion provided at one side of the body so that fluid is sucked from the outside by an ejection flow of the nozzle and the suction portion and a fluid sucked from the suction portion are mixed with a fluid injected from the nozzle, A diffuser part provided inside the body to be connected to the mixing part to increase the fluid mixed in the mixing part and to send the mixed fluid to the outside, and a diffuser part for varying the opening amount of the discharging part of the nozzle, A needle disposed at one end of the nozzle so as to move forward and backward with respect to the discharge portion, And a needle driving part connected to the needle so as to move forward and backward with respect to the discharging part.

Wherein the needle driving unit includes a sensing tube that is installed in contact with an outer surface of the evaporator so that a working fluid is stored and a pressure of the working fluid changes according to a temperature of the evaporator, And a piston coupled to the needle so as to move the needle relative to the discharge portion of the nozzle in accordance with a pressure of the pressure chamber and movably installed in the pressure chamber.

The needle driving unit may further include a spring installed in the pressure chamber so as to apply an elastic force to the piston in a direction to advance the needle to the discharge portion of the nozzle.

The needle driving part may include an actuator for generating a driving force and a needle power transmitting part for connecting the needle and the actuator to transmit the driving force of the actuator to the needle so that the needle moves.

Wherein the actuator includes a motor and a drive shaft coupled to the motor, wherein the needle power transmission portion includes a needle thread portion integrally formed with the needle on one side of the needle extending outwardly of the nozzle, And a needle driving screw that is connected to the driving shaft and rotates so that the needle can be moved forward and backward by a screw movement.

The variable type ejector according to one aspect of the present invention may further include a nozzle driving unit movably installed on the body such that the nozzle moves forward and backward with respect to the mixing unit and connected to the nozzle to advance and retreat the nozzle with respect to the mixing unit .

The nozzle driving unit may include an actuator for generating a driving force and a nozzle power transmitting unit for connecting the nozzle and the actuator to transmit the driving force of the actuator to the nozzle so that the nozzle moves.

Wherein the actuator includes a motor and a drive shaft coupled to the motor, wherein the nozzle power transmission portion includes a nozzle thread portion integrally provided with the nozzle on one side of the nozzle, and a screw thread portion screwed with the nozzle thread portion, And a nozzle drive screw connected to the drive shaft and rotated to move forward and backward by a motion.

Wherein the needle driving portion includes a needle power transmitting portion for connecting the needle and the actuator to transmit the driving force of the actuator to the needle so that the needle moves, and the needle power transmitting portion is extended to the outside of the nozzle of the needle And a needle driving screw which is connected to the driving shaft so as to move the needle forward and backward by a screw movement.

The nozzle power transmission unit includes a nozzle coupling gear coupled to the nozzle driving screw, a nozzle driving gear that is connected to the nozzle coupling gear, and a driving shaft connected to the driving shaft and the nozzle driving gear so that the rotational force of the driving shaft can be transmitted to the nozzle driving gear. And a first clamp installed on the drive shaft to mechanically connect the drive gear, wherein the needle power transmission portion includes a needle coupling gear engaged with the needle driving screw, a needle drive coupled with the needle coupling gear, And a second clamp installed on the drive shaft so as to be spaced apart from the first clamp to mechanically connect the drive shaft and the needle drive gear so that the rotational force of the drive shaft can be transmitted to the needle drive gear, , The motor is connected or disconnected between the first clamp and the nozzle driving gear, and the second clamp So that the loop and the needle drive gear may be disconnected or the connection can be set up so as to be movable in the body with the drive shaft.

The variable ejector according to one aspect of the present invention further includes an actuator moving part installed on the body for moving the motor so that the driving shaft is mechanically connected to either the nozzle driving gear or the needle driving gear .

According to another aspect of the present invention, there is provided a variable type ejector including a body, a nozzle having a discharge part for discharging the fluid at a high speed and movably installed on the body, A suction part provided at one side of the body so that fluid is sucked from the outside by the flow of the fluid from the nozzle part and the nozzle, A diffuser part provided inside the body to be connected to the mixing part for boosting the fluid mixed in the mixing part and sending the mixed fluid to the outside, And a nozzle driving unit connected to the nozzle so as to move forward and backward with respect to the nozzle.

The nozzle driving unit includes a pressure sensing cylinder that is installed in contact with the outer surface of the evaporator so that the working fluid is stored and the pressure of the working fluid changes according to the temperature of the evaporator, And a piston coupled to the nozzle so as to move the nozzle relative to the mixing unit according to a pressure of the pressure chamber and movably installed in the pressure chamber.

According to another aspect of the present invention, there is provided a refrigeration cycle apparatus including a compressor for sucking and compressing refrigerant, a condenser for condensing the high-pressure refrigerant discharged from the compressor, An evaporator which evaporates by heat, and a variable ejector. Wherein the variable ejector includes a body and a nozzle provided at an inner side of the body and having a discharge portion for discharging a high-pressure refrigerant introduced from the condenser at a high speed, and an evaporator for discharging refrigerant from the evaporator A mixing unit provided on the body to be connected to the nozzle and the suction unit for mixing the refrigerant sprayed from the nozzle and the refrigerant sucked into the suction unit; A diffuser part provided in the body to be connected to the mixing part to increase the pressure of the refrigerant passing through the mixing part and to send it to the compressor, and a diffuser part having an end in an inside of the nozzle for varying the opening amount of the discharge part of the nozzle. A needle provided so as to move forward and backward with respect to the discharging portion; And a needle driving unit connected to the needle.

The variable ejector may further include a nozzle driving unit movably installed on the body so that the nozzle moves forward and backward with respect to the mixing unit and connected to the nozzle to advance and retreat the nozzle with respect to the mixing unit.

The refrigeration cycle apparatus according to an aspect of the present invention may further include a temperature detector coupled to the evaporator to detect the temperature of the evaporator, wherein the variable ejector is configured to control the operation of the needle driver according to a detection signal of the temperature detector And a control unit for controlling the display unit.

According to another aspect of the present invention, there is provided a refrigeration cycle apparatus comprising: a compressor for sucking and compressing refrigerant; a condenser for condensing the high-pressure refrigerant discharged from the compressor; An evaporator which evaporates by heat, and a variable ejector. The variable ejector includes a body, a nozzle having a body and a discharge portion for discharging the high-pressure refrigerant introduced from the condenser at a high speed and movably installed inside the body, and a discharge port for discharging refrigerant from the discharge portion of the nozzle A suction unit provided at one side of the body so that the refrigerant is sucked from the evaporator; a mixer provided in the body to be connected to the nozzle and the suction unit to mix the refrigerant sprayed from the nozzle and the refrigerant sucked into the suction unit; A diffuser part provided on the body to be connected to the mixing part to increase the pressure of the refrigerant passing through the mixing part and to send it to the compressor, a nozzle connected to the nozzle to move the nozzle forward and backward with respect to the mixing part, And a driving unit.

According to another aspect of the present invention, there is provided a refrigeration cycle apparatus including a temperature detector coupled to the evaporator for detecting a temperature of the evaporator, wherein the variable ejector includes: And a control unit for controlling the display unit.

In the refrigeration cycle apparatus according to the present invention having the above-described configuration, the needles provided on the nozzles of the variable ejector are moved to adjust the amount of opening of the discharge portion of the nozzles, thereby effectively coping with various changes in cooling load conditions And the refrigerant cycle efficiency can be improved.

In addition, the refrigeration cycle apparatus according to the present invention does not have a plurality of ejectors according to the cooling load, and can perform a plurality of ejector functions with one variable ejector, thereby reducing manufacturing cost.

Further, since the nozzle of the variable ejector can move forward and backward with respect to the mixing unit, the refrigerating cycle apparatus according to the present invention can effectively cope with various changes in cooling load conditions due to a change in the operation mode of the refrigeration cycle apparatus, The efficiency can be improved, and the power consumption of the refrigeration cycle device can be reduced.

While the present invention has been described with reference to exemplary embodiments shown in the drawings, it is to be understood that various modifications and equivalents may be resorted to by those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1 is a schematic view of a refrigeration cycle apparatus according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing a variable type ejector of a refrigeration cycle apparatus according to an embodiment of the present invention.
3 is a schematic view of a refrigeration cycle apparatus according to another embodiment of the present invention.
4 is a cross-sectional view schematically showing a variable type ejector of a refrigeration cycle apparatus according to another embodiment of the present invention.
5 is a view for explaining the needle moving process of the variable ejector shown in FIG.

Hereinafter, a variable type ejector according to the present invention and a refrigeration cycle apparatus having the same will be described with reference to the drawings.

FIG. 1 is a schematic view of a refrigeration cycle apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of an ejector of a refrigeration cycle apparatus according to an embodiment of the present invention.

1, a refrigeration cycle apparatus according to an embodiment of the present invention includes a compressor 100, a condenser 150, an evaporator 200, a refrigerant circulation pipe 250, a variable ejector 300 ). The compressor 100, the condenser 150, the evaporator 200 and the variable ejector 300 are connected to a refrigerant circulation pipe 250 for guiding the refrigerant. The compressor 100 sucks and compresses the refrigerant, and the condenser 150 condenses the high-pressure refrigerant discharged from the compressor 100. The evaporator 200 discharges the supplied refrigerant by the absorption heat Evaporate to cool the surroundings.

The refrigerant circulation pipe 250 includes a recovery unit 251 through which the refrigerant is sucked into the compressor 100, a high-pressure refrigerant discharge unit 252 through which the refrigerant is discharged from the compressor 100, A condenser discharge unit 253, an ejector discharge unit 254 through which the refrigerant is discharged from the variable ejector 300, an evaporator inlet 255 through which the refrigerant flows into the evaporator 200, And an evaporator discharge unit 256 which is discharged and introduced into the variable ejector 300. The gas-liquid separator 260 is connected to the ejector discharge portion 254.

The refrigerant discharged from the variable-type ejector 300 flows into the gas-liquid separator 260. The gas-liquid separator 260 stores the refrigerant therein, and the refrigerant flowing from the variable-type ejector 300 is separated into the gaseous refrigerant and the liquid-phase refrigerant. The gas refrigerant separated in the gas-liquid separator 260 is sucked into the compressor 100 through the recovery part 251 and the liquid refrigerant separated in the gas-liquid separator 260 flows through the evaporator inlet part 255 to the evaporator 200 ). A decompressor 270 is installed in the evaporator inlet 255 connecting the gas-liquid separator 260 and the evaporator 200 so that the refrigerant flowing from the gas-liquid separator 260 to the evaporator 200 is decompressed. The pressure (evaporation pressure) in the evaporator 200 can be sufficiently reduced by the decompression action by the decompressor 270.

1 and 2, the variable type ejector 300 includes a body 301, a nozzle 310, a suction portion 320, a mixing portion 322, a diffuser portion 324, a needle 330, and a needle driver 340. The variable type ejector 300 decompressively expands the refrigerant flowing out of the condenser 150 and sucks the gaseous refrigerant evaporated in the evaporator 200 from the suction unit 320 and converts the expansion energy into pressure energy, To increase the suction pressure.

The nozzle 310 is installed in a nozzle mounting portion 302 provided inside the body 301. The nozzle 310 serves to convert the pressure energy of the high-pressure refrigerant flowing out of the condenser 150 into velocity energy to expand the refrigerant under reduced pressure. The nozzle 310 includes a refrigerant inlet 311 through which the refrigerant flows from the condenser 150, a refrigerant passage 312 through which the refrigerant flows and is connected to the refrigerant inlet 311, a refrigerant passage 312 for discharging the refrigerant, And has a discharge portion 313 connected thereto. The refrigerant inlet 311 of the nozzle 310 is connected to the refrigerant inlet passage 303 provided in the body 301 so as to be connected to the condenser outlet 253 of the refrigerant circulation pipe 250.

The suction part 320 is provided at one side of the body 301 to be connected to the evaporator discharge part 256 of the refrigerant circulation pipe 250. The suction part 320 sucks the gaseous refrigerant evaporated in the evaporator 200 by the flow of the fluid from the discharge part 313 of the nozzle 310.

The mixing unit 322 is provided inside the body 301 so as to be connected to the nozzle 310 and the suction unit 320. The refrigerant sucked into the suction portion 320 by the high-speed flow of the coolant ejected from the nozzle 310 is mixed with the coolant ejected from the nozzle 310 in the mixing portion 322.

The diffuser portion 324 is provided on the body 301 so as to be connected to the mixing portion 322 for boosting the refrigerant that has passed through the mixing portion 322 and sending it to the compressor 100. The diffuser portion 324 is connected to the ejector discharge portion 254 of the refrigerant circulation pipe 250. The diffuser portion 324 has a shape in which the flow path width is expanded from the mixing portion 322 toward the ejector discharge portion 254 and converts the velocity energy of the refrigerant flowing out of the mixing portion 322 into pressure energy, Lt; / RTI >

When the compressor 100 is driven, the refrigerant compressed by the compressor 100 is cooled in the condenser 150 and then flows into the nozzle 310 of the variable ejector 300 to pass through the discharge portion 313 of the nozzle 310 And is decompressed and expanded. At this time, the refrigerant is sucked from the evaporator 200 through the suction part 320 by the flow of the fluid from the discharge part 313, and the refrigerant sucked from the evaporator 200 is sucked by the nozzle 310 from the mixing part 322, Is mixed with the refrigerant ejected from the evaporator. The mixed refrigerant in the mixing section 322 is converted to a positive pressure by the diffuser section 324 and returned to the compressor 100 through the gas-liquid separator 260. The refrigerant is mixed in the mixing portion 322 such that the amount of the refrigerant sucked from the suction portion 320 and the amount of the refrigerant discharged from the nozzle 310 are stored so that the pressure of the refrigerant in the mixing portion 322 also increases do.

The needle 330 is installed such that one end of the needle 330 moves forward and backward with respect to the discharge part 313 inside the nozzle 310. [ One end of the needle 330 has a pointed shape whose width gradually decreases toward the discharge portion 313. The needle 330 is coupled to the nozzle 310 so as to pass through one end of the nozzle 310 in the refrigerant passage 312 of the nozzle 310 so that the other end is disposed outside the nozzle 310. One end of the needle 330 moves forward and backward with respect to the discharge portion 313 from the refrigerant passage 312, thereby varying the opening amount of the discharge portion 313. That is, when the needle 330 advances toward the discharging portion 313, the opening amount of the discharging portion 313 decreases, and when the needle 330 retracts from the discharging portion 313, the opening amount of the discharging portion 313 increases .

The needle 330 is moved by the needle driver 340. The needle driver 340 is provided to be connected to the needle 330 to move the needle 330 forward and backward with respect to the discharge portion 313. The needle driver 340 has a configuration for operating the needle 330 according to the evaporation temperature change of the evaporator 200. The needle driver 340 includes a sensing tube 341, a piston 342, and a spring 343.

The pressure sensing tube 341 stores the working fluid and is installed on the discharge side of the evaporator 200. The pressure sensing chamber 341 is disposed in contact with the outer surface of the evaporator 200 so that the pressure of the working fluid stored therein changes according to the evaporation temperature of the evaporator 200. A tube 344 is connected to the sensing tube 341 and the tube 344 is connected to a working fluid passage 345 provided on one side of the body 301. The working fluid of the pressure sensing tube 341 is supplied to the pressure chamber 346 through the tube 344 and the working fluid passage 345. The pressure chamber 346 is connected to the working fluid passage 345, ). ≪ / RTI > Therefore, when the working fluid pressure in the pressure sensing cylinder 341 rises, the pressure in the pressure chamber 346 also increases. When the pressure in the sensing cylinder 341 decreases, the pressure in the pressure chamber 346 also decreases.

The piston 342 is engaged with the end of the needle 330 and movably installed in the pressure chamber 346. The piston 342 moves in accordance with the pressure of the pressure chamber 346 to move the needle 330 forward and backward with respect to the discharge portion 313 of the nozzle 310. [ The outer surface of the piston 342 is stably held in close contact with the surface of the pressure chamber 346 of the body 301 so that the pressure of the working fluid can be stably applied to the piston 342, Lt; / RTI >

The spring 343 is installed in the pressure chamber 346 and applies an elastic force to the piston 342 in the direction of advancing the needle 330 to the discharge portion 313 of the nozzle 310. When the evaporation temperature of the evaporator 200 is low and the pressure of the working fluid stored in the sensing chamber 341 is lowered, the spring 343 advances the piston 342 so that the needle 330 moves to the discharge portion 313 of the nozzle 310, Thereby reducing the amount of opening. On the other hand, when the evaporation temperature of the evaporator 200 becomes high and the pressure of the working fluid stored in the pressure sensing cylinder 341 becomes high, the piston 342 retracts while compressing the spring 343 so that the needle 330 is retracted from the discharge portion 313 Whereby the opening amount of the discharge portion 313 is increased. At this time, the flow rate of the refrigerant injected through the discharge portion 313 increases, and the flow rate of the refrigerant sucked through the suction portion 320 also increases. As a result, as the flow rate of the refrigerant flowing into the evaporator 200 increases, 200 will be lowered.

As described above, in the refrigeration cycle apparatus according to an embodiment of the present invention, the needle 330 installed on the nozzle 310 moves according to the evaporation temperature of the evaporator 200, and the opening of the discharge portion 313 of the nozzle 310 It is possible to effectively cope with various changes in the cooling load condition due to the change of the operation mode of the refrigeration cycle apparatus and the like, and the refrigerant cycle efficiency can be improved.

In addition, the refrigeration cycle apparatus according to an embodiment of the present invention can perform a plurality of ejector functions with one variable ejector 300 without having a plurality of ejectors according to the cooling load, thereby reducing manufacturing cost.

In the present embodiment, the needle driver 340 is not limited to the illustrated structure and may be modified into various other structures. For example, the mounting position of the pressure sensing cylinder 341 and the mounting position of the piston 342 and the mounting position of the spring 343 in the pressure chamber 346 can be variously changed.

FIG. 3 is a schematic view of a refrigeration cycle apparatus according to another embodiment of the present invention, FIG. 4 is a cross-sectional view schematically illustrating a variable type ejector of a refrigeration cycle apparatus according to another embodiment of the present invention, and FIG. Is a view for explaining the needle moving process of the variable ejector shown in Fig.

3 to 5, a refrigeration cycle apparatus according to another embodiment of the present invention includes a compressor 100, a condenser 150, an evaporator 200, a variable ejector 400, (250), and a pressure reducer (270). Here, the compressor 100, the condenser 150, the evaporator 200, the refrigerant circulation pipe 250, and the pressure reducer 270 are the same as those described above.

The variable ejector 400 includes a body 401, a nozzle 410, a suction portion 417, a mixing portion 418, a diffuser portion 419, a nozzle driving portion 420, a needle 435, A needle driving unit 440, and a control unit 460. [ The variable type ejector 400 decompressively expands the refrigerant flowing out of the condenser 150 and sucks the gaseous refrigerant evaporated in the evaporator 200 from the suction portion 417 and converts the expansion energy into pressure energy, To increase the suction pressure.

The body 401 is connected to the nozzle installation part 402 where the nozzle 410 is installed and a condenser discharge part 253 of the refrigerant circulation pipe 250 to supply the refrigerant to the nozzle 410 A chamber 404 in which a nozzle driving unit 420 and a needle driving unit 440 are installed, and a first slit 405. The suction unit 417, the mixing unit 418, and the diffuser unit 419 are also provided on the body 401.

The nozzle 410 is movably installed in the body 401 so that a part of the nozzle 410 is positioned at the nozzle mounting portion 402 of the body 401. The nozzle 410 converts the pressure energy of the high-pressure refrigerant flowing out of the condenser 150 into a velocity energy, thereby expanding the pressure of the refrigerant. The nozzle 410 has a refrigerant inlet 411 through which the refrigerant flows from the condenser 150, a refrigerant channel 412 connected to the refrigerant inlet 411 and through which the refrigerant flows, a refrigerant channel 412, And has a discharge portion 413 connected thereto. The refrigerant inlet port 411 of the nozzle 410 is connected to the refrigerant inlet passage 403 of the body 401 through a refrigerant inlet tube 407 provided inside the body 401.

The refrigerant inflow tube 407 may be made of a flexible material capable of maintaining the connection between the refrigerant inflow passage 403 of the body 401 and the refrigerant inflow opening 411 of the nozzle 410 even when the nozzle 410 moves. In addition to the method of using a flexible tube for maintaining the connection between the refrigerant inflow passage 403 of the body 401 and the refrigerant inflow opening 411 of the nozzle 410, the refrigerant inflow passage structure of the body and the refrigerant inflow- So that even if the nozzle moves, the refrigerant can be stably introduced into the nozzle.

The first rotation preventing protrusion 414 protrudes from one side of the outer surface of the nozzle 410. The first rotation preventing protrusion 414 is slidably inserted into the first slit 405 of the body. The first rotation preventing protrusion 414 of the nozzle 410 is inserted into the first slit 405 of the body 401 so that the nozzle 410 is moved in the longitudinal direction of the first slit 405, But it can not be rotated with respect to the body 401. In this case, A second slit 415 extending in the same direction as the first slit 405 of the body 401 is provided at one side of the nozzle 410.

The suction part 417 is provided on one side of the body 401 so as to be connected to the evaporator discharge part 256 of the refrigerant circulation pipe 250. The suction part 417 sucks the vapor-phase refrigerant evaporated in the evaporator 200 by the flow of the fluid from the discharge part 413 of the nozzle 410.

The mixing unit 418 is provided inside the body 401 so as to be connected to the nozzle 410 and the suction unit 417. The refrigerant sucked into the suction portion 417 by the high-speed flow of the coolant ejected from the nozzle 410 is mixed with the coolant ejected from the nozzle 410 in the mixing portion 418.

The diffuser section 419 is provided in the body 401 so as to be connected to the mixing section 418 so as to pressurize the refrigerant that has passed through the mixing section 418 and send it to the compressor 100. The diffuser portion 419 is connected to the ejector discharge portion 254 of the refrigerant circulation pipe 250. The diffuser section 419 has a shape in which the flow path width thereof is enlarged from the mixing section 418 toward the ejector discharge section 254 and converts the velocity energy of the refrigerant flowing out of the mixing section 418 into pressure energy, Lt; / RTI >

The nozzle driving unit 420 includes an actuator 421 for moving the nozzle 410 and generating driving force and a nozzle 410 and an actuator 421 for transmitting the driving force of the actuator 421 to the nozzle 410. [ And a nozzle power transmitting portion 425 for connecting the nozzle power transmitting portion 425 and the nozzle power transmitting portion 425. The actuator 421 includes a motor 422 and a drive shaft 423 coupled to the motor 422. The nozzle power transmitting portion 425 includes a nozzle thread portion 426, a nozzle driving screw 427, a nozzle connecting gear 429, a nozzle driving gear 430 and a first clamp 433.

The nozzle thread portion 426 of the nozzle power transmission portion 425 is provided in a portion disposed outside the nozzle attachment portion 402 of the nozzle 410. [ The nozzle thread portion 426 is provided integrally with the nozzle 410 in the form of a male screw provided on one side of the outer circumferential surface of the nozzle 410.

The nozzle driving screw 427 is rotatably installed in the chamber 404 of the body 401 so as to be screwed with the nozzle thread portion 426 with a female thread corresponding to the male thread portion of the nozzle thread portion 426. The nozzle driving screw 427 is rotatably supported by a nozzle driving screw rotating support portion 428 provided in the chamber 404 of the body 401. When the nozzle driving screw 427 rotates, the nozzle 410 moves forward and backward with respect to the mixing portion 418 by the screw movement of the nozzle screw portion 426 and the nozzle driving screw 427. A nozzle connecting gear 429 is coupled to the nozzle driving screw 427.

The nozzle driving gear 430 is rotatably installed in the chamber 404 of the body 401 so as to be gear-connected to the nozzle connecting gear 429. The nozzle driving gear 430 has a hole through which the driving shaft 423 of the actuator 421 can be inserted and a first clamping groove 431 is formed at a central portion of the nozzle driving gear 430. The nozzle driving gear 430 is rotatably supported by a nozzle driving gear rotation support portion 432 installed in the chamber 404 of the body 401. The nozzle driving gear 430 receives the rotational force of the driving shaft 423 and rotates the nozzle connecting gear 429.

The first clamp 433 is provided to protrude from one side of the outer circumferential surface of the drive shaft 423 to mechanically connect the drive shaft 423 and the nozzle drive gear 430. When the first clamp 433 is inserted into the first clamp groove 431 of the nozzle driving gear 430, the driving shaft 423 and the nozzle driving gear 430 are mechanically connected to each other so that the rotational force of the driving shaft 423 drives the nozzle And transmitted to the gear 430. On the other hand, if the first clamp 433 is moved away from the first clamp groove 431 of the nozzle drive gear 430, the mechanical connection between the drive shaft 423 and the nozzle drive gear 430 is released and the drive shaft 423 is rotated The nozzle driving gear 430 can not rotate.

When the motor 422 is operated in a state where the first clamp 433 is inserted into the first clamp groove 431 of the nozzle driving gear 430, the rotational force of the motor 422 is transmitted to the driving shaft 423 and the nozzle driving gear 430 and the nozzle connecting gear 429 to the nozzle driving screw 427. At this time, the nozzle driving screw 427 rotates and the nozzle 410 moves forward and backward with respect to the mixing part 418 by the screw movement between the nozzle screw part 426 and the nozzle driving screw 427.

The suction amount or the suction pressure of the refrigerant through the suction part 417 varies depending on the position of the nozzle 410 in the body 401. [ In addition, the position of the nozzle 410 affects the evaporation pressure in the evaporator 200. Accordingly, if the position of the nozzle 410 is appropriately adjusted according to the evaporation temperature of the evaporator 200, it is possible to effectively cope with various changes in the cooling load condition due to the change of the operation mode of the refrigeration cycle apparatus, and the refrigerant cycle efficiency can be improved.

The needle 435 is installed such that one end of the needle 435 moves forward and backward with respect to the discharge portion 413 inside the nozzle 410. [ One end of the needle 435 has a pointed shape whose width gradually decreases toward the discharge portion 413. The needle 435 is coupled to the nozzle 410 through one end of the nozzle 410 in the refrigerant passage 412 of the nozzle 410 so that the other end is disposed outside the nozzle 410. One end of the needle 435 advances and retreats from the refrigerant passage 412 to the discharge portion 413, thereby varying the opening amount of the discharge portion 413.

A second rotation preventing protrusion 436 protrudes from one side of the outer surface of the needle 435. The second rotation preventing protrusion 436 is slidably inserted into the second slit 415 provided in the nozzle 410. The second rotation preventing protrusion 436 of the needle 435 is inserted into the second slit 415 of the nozzle 410 so that the needle 435 is moved in the longitudinal direction of the second slit 415, It can move linearly in the advancing / retracting direction with respect to the discharge portion 413, but can not rotate with respect to the nozzle 410.

The needle 435 is moved by the needle driver 440. The needle driving unit 440 includes an actuator 421 for generating a driving force and a needle power transmitting unit 441 for connecting the needle 435 and the actuator 421 to transmit the driving force of the actuator 421 to the needle 435. [ . The actuator 421 is the same as the actuator 421 of the nozzle driving unit 420 and the nozzle driving unit 420 and the needle driving unit 440 share the actuator 421. The needle power transmitting portion 441 includes a needle thread portion 442, a needle driving screw 443, a needle connecting gear 445, a needle driving gear 446 and a second clamp 449.

The needle thread portion 442 of the needle power transmission portion 441 is provided in a portion of the needle 435 disposed outside the nozzle 410. [ The needle thread portion 442 is integrally provided with the needle 435 in the form of a male thread provided on one side of the outer peripheral surface of the needle 435.

The needle drive screw 443 is rotatably mounted in the chamber 404 of the body 401 with a female thread corresponding to the male thread of the needle thread 442 and threaded with the needle thread 442. The needle driving screw 443 is rotatably supported by a needle driving screw rotation support portion 444 provided in the chamber 404 of the body 401. When the needle driving screw 443 is rotated, the needle 435 moves forward and backward with respect to the discharging portion 413 of the nozzle 410 by the screw movement of the needle thread portion 442 and the needle driving screw 443. The needle driving gear 445 is engaged with the needle driving screw 443.

 The needle driving gear 446 is rotatably installed in the chamber 404 of the body 401 so as to be gear-connected to the needle connecting gear 445. The needle driving gear 446 has a hole through which the driving shaft 423 of the actuator 421 can be inserted and a second clamping groove 447 is provided at one side of the central portion of the needle driving gear 446. The needle driving gear 446 is rotatably supported by a needle driving gear rotating support portion 448 provided in the chamber 404 of the body 401. The needle driving gear 446 receives the rotational force of the driving shaft 423 and rotates the needle connecting gear 445.

The second clamp 449 is spaced apart from the second clamp 449 at one side of the outer circumferential surface of the drive shaft 423 to mechanically connect the drive shaft 423 and the needle drive gear 446. When the second clamp 449 is inserted into the second clamp groove 447 of the needle driving gear 446, the driving shaft 423 and the needle driving gear 446 are mechanically connected, And transmitted to the gear 446. On the other hand, if the second clamp 449 is displaced from the second clamp groove 447 of the needle drive gear 446, the mechanical connection between the drive shaft 423 and the needle drive gear 446 is released so that the drive shaft 423 rotates The needle driving gear 446 does not rotate.

When the motor 422 is operated with the second clamp 449 inserted into the second clamp groove 447 of the needle driving gear 446, the rotational force of the motor 422 is transmitted to the driving shaft 423 and the needle driving gear 446 and the needle connecting gear 445 to the needle drive screw 443. The needle driving screw 443 rotates and the needle 435 moves forward and backward with respect to the discharging portion 413 of the nozzle 410 by the screw movement between the needle thread portion 442 and the needle driving screw 443. [

As described above, the amount of opening of the discharge portion 413 of the nozzle 410 can be adjusted by appropriately moving the needle 435 in the nozzle 410. Therefore, if the position of the needle 435 is appropriately adjusted according to the evaporation temperature of the evaporator 200, it is possible to effectively cope with various changes in the cooling load conditions due to the change of the operation mode of the refrigeration cycle apparatus, and improve the refrigerant cycle efficiency.

The driving force of the actuator 421 is selectively transmitted to either the nozzle 410 or the needle 435. To this end, the actuator 421 is movably installed in the chamber 404 of the body 401 and is moved by the actuator moving unit 450.

The actuator moving unit 450 includes a slider 451 coupled to the motor 422 of the actuator 421, a guide 452 slidably supporting the slider 451, and a guide 452 And a slider moving mechanism 453 for moving the slider moving mechanism 453 along the slider moving mechanism 453. The slider 451 is made of a magnetic material that can move by magnetic force such as iron or magnet. The slider moving mechanism 453 includes a first electromagnet 454 and a second electromagnet 455 disposed to face each other with a slider 451 therebetween. The slider 451 is moved toward the first electromagnet 454 when a current is supplied to the first electromagnet 454 and a magnetic force is generated in the first electromagnet 454 in a state in which the current supply to the second electromagnet 455 is cut off And the slider 451 is connected to the second electromagnet 455 when current is supplied to the second electromagnet 455 while the current supply to the first electromagnet 454 is cut off, .

The operation of the actuator 421 and the actuator moving unit 450 is controlled by the control unit 460. The controller 460 receives the detection signal from the temperature detector 465 coupled to the evaporator 200 to detect the temperature of the evaporator 200 and controls the operation of the actuator 421 and the actuator moving unit 450.

4, when the control unit 460 receives the detection signal from the temperature detector 465 and determines that it is necessary to adjust the position of the nozzle 410 according to the temperature of the evaporator 200, The first clamp 433 of the drive shaft 423 is inserted into the first clamp groove 431 of the nozzle drive gear 430 by controlling the actuator 421 to move the actuator 421 forward. Then, the actuator 421 is operated to move the nozzle 410. At this time, the control unit 460 may advance or retreat the nozzle 410 to the mixing unit 418 by rotating the motor 422 in the forward or reverse direction. Since the second clamp 449 of the driving shaft 423 is out of the second clamp groove 447 of the needle driving gear 446 when the driving force of the actuator 421 is transmitted to the nozzle 410, The needle driving gear 446 does not rotate.

The controller 460 receives the detection signal from the temperature detector 465 and determines that it is necessary to adjust the opening amount of the discharging portion 413 of the nozzle 410 according to the temperature of the evaporator 200, The second clamp 449 of the driving shaft 423 is inserted into the first clamp groove 431 of the nozzle driving gear 430 by controlling the actuator moving unit 450 as shown in FIG. Then, the actuator 421 is operated to move the needle 435. At this time, the control unit 460 may advance or retract the needle 435 relative to the discharge portion 413 of the nozzle 410 by rotating the motor 422 in the forward or reverse direction. Since the first clamp 433 of the driving shaft 423 is out of the first clamp groove 431 of the nozzle driving gear 430 when the driving force of the actuator 421 is transmitted to the needle 435, The nozzle driving gear 430 does not rotate.

Although the actuator 421 and the actuator moving unit 450 are shown to be operated in accordance with the detection signal of the temperature detector 465 for detecting the temperature of the evaporator 200, the actuator 421 and the actuator moving unit 450 may be controlled by the user. In this case, the operator operates the actuator 421 and the actuator moving unit 450 by operating the operation unit (not shown) in accordance with the operation mode of the refrigeration cycle apparatus, thereby changing the position of the nozzle 410 and the position of the needle 435 Can be adjusted appropriately.

Further, the actuator moving part 450 can be changed into various other structures that can move the actuator 421, in addition to the structure having the slider moving mechanism 453 of the electromagnet structure as shown in the figure.

The nozzle 410 and the needle 435 are mechanically connected to the actuator 421 to receive the driving force from the actuator 421 to move the nozzle 410 and the needle 435, As shown in FIG. That is, the nozzle driving unit and the needle driving unit may have a structure including the sensing cylinder 341, the piston 342, and the spring 343 as shown in FIG. In this case, the evaporator is provided with a pressure chamber in which a working fluid is stored, and a pair of pressure chambers, into which the working fluid flows, are provided inside the body, and pistons and springs are provided in each of them. The nozzle and the needle can be moved according to the evaporation temperature of the evaporator by connecting the piston and the nozzle provided in one pressure chamber and connecting the needle to the piston provided in the other pressure chamber. One pressure chamber is connected to a pair of pressure chambers through a branch pipe, and a valve is installed in the branch pipe to selectively connect the pressure chamber and the two pressure chambers. In the case of installing two pressure sensing chambers, the respective pressure sensing chambers can be connected to the two pressure chambers, respectively.

As described above, in the refrigeration cycle apparatus according to another embodiment of the present invention, the nozzle 410 of the variable ejector 400 moves forward and backward with respect to the mixing unit 418, The installed needle 435 is moved to adjust the opening amount of the discharge portion 413 of the nozzle 410 to effectively cope with various changes in the cooling load conditions due to the change of the operation mode of the refrigerating cycle apparatus, have.

As described above, in the variable type ejector according to the present invention and the refrigerating cycle apparatus having the variable type ejector according to the present invention, since the nozzle position of the variable ejector is changed or the opening amount of the discharge portion of the nozzle is controlled by the needles, Various configurations are possible within a range that can effectively cope with changes in load conditions.

The variable type ejector according to the present invention and the refrigeration cycle apparatus having the variable type ejector can be applied to various refrigeration cycle devices such as a refrigerator, a freezer, and an air conditioner.

100 ... compressor 150 ... condenser
200 ... evaporator 250 ... refrigerant circulation pipe
300, 400 ... variable type ejectors 301, 401 ... body
302, 402, ... nozzle mounting portions 303, 403, ...,
310, 410 ... Nozzles 311, 411 ... Refrigerant inlet
312, 412, ..., refrigerant flow paths 313, 413, ...,
320, 417 ... suction part 322, 418 ... mixing part
324, 419 ... diffuser portion 330, 435 ... needle
340, 440, a needle driver 341,
342 ... piston 343 ... spring
344 ... tube 346 ... pressure chamber
404 ... chambers 405, 415 ... first and second slits
414, 436 ... first and second rotation preventing projections 420 ... nozzle driving parts
421 ... actuator 422 ... motor
423 ... drive shaft 425 ... nozzle power transmission portion
426 ... nozzle thread 427 ... nozzle drive screw
429 ... Nozzle connecting gear 430 ... Nozzle driving gear
431, 447 ... first and second clamp grooves 433, 449 ... first and second clamps
441 ... Needle power transmission portion 442 ... Needle thread portion
443 ... Needle drive screw 445 ... Needle connecting gear
446 ... Needle drive gear 450 ... Actuator moving part
451 ... slider 425 ... guide
453 ... slider moving mechanism 454, 455 ... first and second electromagnets

Claims (18)

body; A nozzle having a discharge part for discharging the fluid at a high speed and installed inside the body; A suction part provided at one side of the body so that fluid is sucked from the outside by the flow of the fluid from the discharge part of the nozzle; A mixing unit connected to the nozzle and the suction unit on the inside of the body so as to mix the fluid ejected from the nozzle and the fluid sucked from the suction unit; A diffuser unit disposed inside the body to be connected to the mixing unit for boosting the mixed fluid in the mixing unit and sending the mixed fluid to the outside; A needle disposed at one end of the nozzle so as to move forward and backward with respect to the discharging portion in order to vary an opening amount of the discharging portion of the nozzle; And a needle driver connected to the needle to move the needle forward and backward with respect to the discharging portion,
Wherein the nozzle further comprises a nozzle driving part movably installed on the body so as to move forward and backward with respect to the mixing part and connected to the nozzle to advance and retreat the nozzle with respect to the mixing part,
Wherein the nozzle driving unit includes an actuator that generates a driving force and a nozzle power transmission unit that connects the nozzle and the actuator to transmit the driving force of the actuator to the nozzle so that the nozzle moves,
Wherein the actuator includes a motor and a drive shaft coupled to the motor, wherein the nozzle power transmission portion includes a nozzle thread portion integrally provided with the nozzle on one side of the nozzle, and a screw thread portion screwed with the nozzle thread portion, And a nozzle driving screw connected to the driving shaft so as to rotate forward and backward by a motion,
Wherein the needle driving portion includes a needle power transmitting portion for connecting the needle and the actuator to transmit the driving force of the actuator to the needle so that the needle moves, and the needle power transmitting portion is extended to the outside of the nozzle of the needle And a needle driving screw which is connected to the driving shaft so as to be able to move the needle forward and backward by a screw movement,
The nozzle power transmission unit includes a nozzle coupling gear coupled to the nozzle driving screw, a nozzle driving gear that is connected to the nozzle coupling gear, and a driving shaft connected to the driving shaft and the nozzle driving gear so that the rotational force of the driving shaft can be transmitted to the nozzle driving gear. And a first clamp installed on the drive shaft to mechanically connect the drive gear, wherein the needle power transmission portion includes a needle coupling gear engaged with the needle driving screw, a needle drive coupled with the needle coupling gear, And a second clamp installed on the drive shaft so as to be spaced apart from the first clamp to mechanically connect the drive shaft and the needle drive gear so that the rotational force of the drive shaft can be transmitted to the needle drive gear, , The motor is connected or disconnected between the first clamp and the nozzle driving gear, and the second clamp The program and the needle drive gear is movable in the body with the drive shaft installed to be connected or disconnected,
Further comprising an actuator moving part installed on the body for moving the motor so that the driving shaft can be mechanically connected to the nozzle driving gear and the needle driving gear. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete A compressor for sucking and compressing the refrigerant;
A condenser for condensing the high-pressure refrigerant discharged from the compressor;
An evaporator for evaporating the supplied refrigerant by absorption heat; And
body; A nozzle having a discharge part for discharging the fluid at a high speed and installed inside the body; A suction part provided at one side of the body so that fluid is sucked from the outside by the flow of the fluid from the discharge part of the nozzle; A mixing unit connected to the nozzle and the suction unit on the inner side of the body so as to mix the fluid ejected from the nozzle and the fluid sucked from the suction unit; A diffuser unit disposed inside the body to be connected to the mixing unit for boosting the mixed fluid in the mixing unit and sending the mixed fluid to the outside; A needle disposed at one end of the nozzle so as to move forward and backward with respect to the discharging portion in order to vary an opening amount of the discharging portion of the nozzle; And a needle driving part connected to the needle to move the needle forward and backward with respect to the discharging part, wherein the nozzle is movably provided on the body so as to move forward and backward with respect to the mixing part, And a nozzle driving unit connected to the nozzle so as to move forward and backward with respect to the nozzle, wherein the nozzle driving unit includes: an actuator for generating a driving force; and a controller for controlling the nozzle and the actuator to transmit the driving force of the actuator to the nozzle, Wherein the actuator includes a motor and a drive shaft coupled to the motor, wherein the nozzle power transmission portion includes a nozzle thread portion integrally formed with the nozzle on one side of the nozzle, And a driving mechanism for driving the nozzle so that the nozzle can be moved forward and backward by a screw movement, And the needle driving unit includes a needle power transmitting unit for connecting the needle and the actuator to transmit the driving force of the actuator to the needle so that the needle moves, The delivery portion includes a needle thread portion integrally formed with the needle on one side of the needle extending outwardly of the nozzle, a needle thread portion screwed to the needle thread portion, and connected to the drive shaft so as to move the needle forward and backward by a screw movement, Wherein the nozzle driving force transmitting portion includes a nozzle connecting gear which is engaged with the nozzle driving screw, a nozzle driving gear which is gear-connected to the nozzle connecting gear, and a nozzle driving gear which transmits rotational force of the driving shaft to the nozzle driving gear The driving shaft and the nozzle driving gear are mechanically connected Wherein the needle driving force transmitting portion includes a needle connecting gear which is engaged with the needle driving screw, a needle driving gear which is gear-connected to the needle connecting gear, and a second driving force transmitting portion Further comprising a second clamp disposed on the driving shaft so as to be spaced apart from the first clamp to mechanically connect the driving shaft and the needle driving gear so as to be transmitted to the needle driving gear, And the nozzle driving gear is connected or disconnected and is connected to the body so that the second clamp and the needle driving gear can be connected or disconnected together with the driving shaft, To move the motor so as to be mechanically connected to any one of the needle driving gears And a variable ejector including an actuator moving part installed on the body. 18. The method of claim 17,
And a temperature detector coupled to the evaporator for detecting the temperature of the evaporator,
Wherein the variable-type ejector further comprises a controller for controlling an operation of the nozzle driver according to a detection signal of the temperature detector.
KR1020150104467A 2015-07-23 2015-07-23 Variable ejector and refrigerant cycle apparatus having the same KR101728955B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102038934B1 (en) * 2018-08-29 2019-10-31 에이텍엘써모 주식회사 A Lower Global Warming Potential Type of a Cooling System for a Refrigerator Truck

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004044906A (en) * 2002-07-11 2004-02-12 Denso Corp Ejector cycle
JP2004101053A (en) * 2002-09-09 2004-04-02 Denso Corp Air conditioner
JP2005233121A (en) * 2004-02-20 2005-09-02 Nippon Soken Inc Variable flow rate nozzle
JP2005248712A (en) * 2004-03-01 2005-09-15 Toyota Motor Corp Ejector and fuel cell system equipped therewith
JP2005264747A (en) * 2004-03-16 2005-09-29 Jfe Engineering Kk Ejector, its operation method, and refrigerating system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4984453B2 (en) 2004-09-22 2012-07-25 株式会社デンソー Ejector refrigeration cycle
JP4259531B2 (en) 2005-04-05 2009-04-30 株式会社デンソー Ejector type refrigeration cycle unit
US7779647B2 (en) 2005-05-24 2010-08-24 Denso Corporation Ejector and ejector cycle device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004044906A (en) * 2002-07-11 2004-02-12 Denso Corp Ejector cycle
JP2004101053A (en) * 2002-09-09 2004-04-02 Denso Corp Air conditioner
JP2005233121A (en) * 2004-02-20 2005-09-02 Nippon Soken Inc Variable flow rate nozzle
JP2005248712A (en) * 2004-03-01 2005-09-15 Toyota Motor Corp Ejector and fuel cell system equipped therewith
JP2005264747A (en) * 2004-03-16 2005-09-29 Jfe Engineering Kk Ejector, its operation method, and refrigerating system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102038934B1 (en) * 2018-08-29 2019-10-31 에이텍엘써모 주식회사 A Lower Global Warming Potential Type of a Cooling System for a Refrigerator Truck

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