WO2015156647A1 - 전동 압축기 및 이의 제어방법 - Google Patents
전동 압축기 및 이의 제어방법 Download PDFInfo
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- WO2015156647A1 WO2015156647A1 PCT/KR2015/003639 KR2015003639W WO2015156647A1 WO 2015156647 A1 WO2015156647 A1 WO 2015156647A1 KR 2015003639 W KR2015003639 W KR 2015003639W WO 2015156647 A1 WO2015156647 A1 WO 2015156647A1
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- WIPO (PCT)
- Prior art keywords
- refrigerant
- electric compressor
- state
- compressor
- motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
Definitions
- the present invention relates to a motor-driven compressor and a control method thereof, wherein the motor-driven compressor is configured to maintain the gaseous refrigerant through heating when the gaseous refrigerant present in the electric compressor is partially changed into a liquid refrigerant. It relates to a control method thereof.
- compressors used for the purpose of compressing a refrigerant in a vehicle cooling system have been developed in various forms.
- a configuration for compressing a refrigerant is a reciprocating type that performs compression while performing a reciprocating motion, and a compression that performs a rotational motion. There is a rotary to perform.
- the coolant When the temperature of the outdoor air is low, such as a season or a winter season, the coolant is accompanied by a phase change in which the temperature of the coolant drops below the boiling point and is changed from the gaseous phase to the liquid phase. Since the refrigerant in the liquid can not be compressed, a problem that gradually accumulate fatigue in the compression system due to the resistance of the fluid when the liquid refrigerant is introduced.
- liquid refrigerants are not only disadvantageous to lubrication because they basically wash oil in the compressor, and in particular, if the refrigerant is not sufficiently vaporized at the discharge end of the compressor, oil separation does not occur properly, and thus the normal operation of the oil separation system is not accompanied. Will cause problems.
- the compressor of the conventional air conditioning system tests the hydraulic compression start over thousands of cycles in the specification for the durability design, and tests whether the durability standard for the driving unit is achieved.
- the rigid design for the driving unit is necessarily accompanied. Therefore, there is an urgent need for a method for preventing a liquid compression start in a compressor.
- a motor-driven compressor includes a sensing unit for sensing a refrigerant state of the motor-compressor; A connection part wound around a position adjacent to a flow path of a housing in which the refrigerant moves within the electric compressor; And a control unit configured to control the power applied to the connection unit differently from each other according to the sensed data sensed through the detection unit to perform control according to the state of the refrigerant.
- the sensing unit includes a temperature sensor for sensing the temperature of the electric compressor.
- the detection unit includes a pressure sensor for sensing the pressure of the electric compressor.
- the control unit may provide the driver with current display information of the electric compressor through a display unit provided in the instrument panel according to the data sensed by the detection unit.
- the control unit may further include an operation unit for calculating enthalpy data according to the sensed data detected by the detection unit.
- An electric compressor includes: a sensing unit for sensing a refrigerant state of an electric compressor; a connection unit wound adjacent to a flow path of a housing in which a refrigerant moves in the electric compressor; A control unit controlling power applied to the connection unit according to the sensed data detected through the detection unit; And a communication module receiving the control signal transmitted from the controller and providing the state information of the current electric compressor to a terminal owned by the administrator.
- the control unit may further include a memory unit in which the sensing data is stored when the sensing data detected by the sensing unit is not transmitted to the manager through a communication module, and when the manager boards a vehicle, the control unit may store the sensing data stored in the memory unit. Characterized in that the information is provided to the driver through the display unit provided on the instrument panel.
- the sensing unit includes a temperature sensor for sensing the temperature of the electric compressor; It includes a pressure sensor for detecting the pressure of the electric compressor.
- the compressor according to the present embodiment is characterized in that any one of a vehicle or an industrial compressor using a refrigerant as a working fluid is selectively used.
- the control method of the electric compressor according to the third embodiment of the present invention comprises the steps of performing position alignment with respect to the rotor after the power is turned on (ST10); A refrigerant state determination step (ST20) of determining whether the refrigerant is a liquid phase or a gaseous phase after the position alignment with respect to the rotor is made; Applying pre-heating to the refrigerant by applying power to the electric compressor according to the state of the refrigerant (ST30); And controlling the electric compressor to a normal operating state after the preheating is performed (ST40).
- Performing a position alignment with respect to the rotor includes the step of setting the operating position of the rotor and the stator of the motor compressor by applying a DC power to the motor compressor for t seconds.
- the refrigerant state determining step ST20 may include a temperature sensing step of detecting a temperature inside the electric compressor (ST22); And a pressure sensing step ST24 for sensing the pressure inside the electric compressor.
- the refrigerant state determination step ST20 further includes an enthalpy determination step ST26 for determining enthalpy data according to temperature and pressure inside the electric compressor.
- the step of performing preheating on the refrigerant (ST30) includes a first preheating step (ST32) of controlling the intensity and the application time of the DC power applied to the electric compressor differently.
- the pre-heating of the refrigerant (ST30) further includes a second pre-heating step (ST34) of controlling the intensity and the application time of the DC power applied to the electric compressor after the first pre-heating step. Include.
- the step of performing preheating on the coolant (ST30) further includes a coolant state rechecking step (ST36) of re-determining whether the current coolant is in a liquid state or a gas phase while preheating of the coolant is performed.
- the control method of the electric compressor according to the fourth embodiment of the present invention comprises the steps of performing a position alignment for the rotor after the power is turned on (ST100); A refrigerant state determination step (ST200) of determining whether the refrigerant is in a liquid state or a gaseous state after the alignment of the rotor is performed; An information providing step of providing status information of a current electric compressor to a manager according to a refrigerant state inside the electric compressor (ST300); Performing preheating of the refrigerant by applying power to the electric compressor according to the control command of the manager (ST400); And controlling the electric compressor to a normal operating state after the preheating is performed (ST500).
- the information providing step of providing status information of the current electric compressor to the manager may include: connecting the communication with a server through a communication module provided in a mounting object to which the electric compressor is mounted (ST310); In operation ST320, the state information on the refrigerant of the electric compressor is displayed on a terminal owned by an administrator.
- the pre-heating of the refrigerant may include: immediately performing pre-heating of the refrigerant by applying DC power to the electric compressor when a control command is received through the manager (ST410); And a status information repetition notification step ST420 of repeatedly providing additional status information of the electric compressor to the manager for N times when the control command is not transmitted through the manager.
- Performing preheating for the refrigerant is a step of automatically controlling the electric compressor with a predetermined power (ST430) if a control command through the administrator is not received even after the state information repeat notification step (ST420) It includes more.
- the control method of the electric compressor according to the fifth embodiment of the present invention includes a refrigerant state determination step (ST1000) of determining whether the refrigerant located in the interior of the electric compressor is a liquid phase or a gas state when the vehicle is turned off; Performing preheating of the refrigerant by applying power to the electric compressor regardless of whether the vehicle is started or not according to the state of the refrigerant (ST2000); And transmitting the state information of the current electric compressor to the manager after the preheating is performed (ST3000).
- ST1000 refrigerant state determination step
- Refrigerant state determination step (ST1000) of determining whether the refrigerant is a liquid phase or gas phase includes a step (ST1100) of periodically determining the refrigerant state of the electric compressor.
- the preheating of the refrigerant may include: a power supply step (ST2100) of constantly applying the intensity and the application time of the DC power applied to the electric compressor for t1 hours; And controlling the power applied to the motor-compressor to the off state after applying power to the motor-compressor for t1 time (ST2200).
- the present invention it is possible to accurately determine the state of the refrigerant inside the electric compressor, and to change the refrigerant into a gaseous state through preheating according to the determined result, thereby stably blocking problems and errors caused by liquid compression in advance. can do.
- the administrator can remotely check the refrigerant state of the electric compressor or easily maintain the electric compressor irrespective of the on or off state of the mounting object in which the electric compressor is installed, so durability and operation efficiency improvement and electric The oil separation efficiency of the compressor can be improved at the same time.
- FIG. 1 is a block diagram showing the configuration of a motor-driven compressor according to a first embodiment of the present invention.
- FIG. 2 is a longitudinal sectional view of the electric compressor according to the first embodiment of the present invention.
- FIG 3 is a view showing the configuration of the inverter and the connection unit according to the first embodiment of the present invention.
- FIG. 4 is a longitudinal sectional view showing an arrangement state of connection portions and flow paths of the electric compressor according to the first embodiment of the present invention
- FIG. 5 is a view showing a state in which the phase change of the refrigerant is made while the connection portion according to the first embodiment of the present invention generates heat.
- FIG. 6 is a block diagram showing a configuration according to a second embodiment of the present invention.
- FIG. 7 is a flowchart illustrating a method of controlling a motor-driven compressor according to a third embodiment of the present invention.
- FIG. 8 is a graph showing a state in accordance with the refrigerant used in the electric compressor according to a third embodiment of the present invention in a PH diagram.
- FIG. 9 is a flowchart showing a configuration according to a fourth embodiment of the present invention.
- FIG. 10 is a flowchart showing a configuration according to a fifth embodiment of the present invention.
- FIG. 11 is a graph showing a state in accordance with the refrigerant used in the electric compressor according to a fifth embodiment of the present invention in a PH diagram.
- Figure 1 is a block diagram showing the configuration of a motor-driven compressor according to a first embodiment of the present invention
- Figure 2 is a longitudinal cross-sectional view of the motor-driven compressor according to a first embodiment of the present invention
- Figure 3 is 4 is a view showing the configuration of the inverter and the connection unit according to the first embodiment
- FIG. 4 is a longitudinal sectional view showing the arrangement of the connection unit and the flow path of the electric compressor according to the first embodiment of the present invention.
- the motor-driven compressor 1 according to the present embodiment is described as limited to a compressor mounted on a vehicle and used as an air conditioning unit, but a compressor of another industrial field using a refrigerant as a working fluid or It is noted that it can be used by acting on all electric compressors exposed to low temperature operating conditions.
- the present invention provides a sensing unit 10 for detecting a refrigerant state of the motor-compressor 1, and a connection unit wound adjacent to the flow path 3 of the housing 2 in which the refrigerant moves inside the motor-compressor ( 20); And a controller 30 for controlling the power applied to the connection unit 20 differently according to the sensed data sensed by the detector 10 to perform control according to the state of the refrigerant.
- the detection unit 10 includes a temperature sensor 11, the temperature sensor 11 is mounted on the outside of the electric compressor to detect the temperature of the motor compressor, or to sense the temperature around the motor compressor. Or located at a specific location in the engine compartment to sense the internal temperature of the engine compartment in which the motor-compressor is installed, installed around a radiator, installed in a car interior to measure the temperature inside the vehicle, or sensing the temperature of outside air In order to be positioned at an outer position of the mounting object mounted with the electric compressor can sense the temperature of the outside air.
- the temperature sensor 11 may sense the temperature of the outside air and transmit the control signal to the control unit 30.
- the temperature sensor 11 may detect the ambient temperature of the electric compressor and transmit the control signal to the control unit 30. Make it possible.
- the detection unit 10 includes a pressure sensor 12 together with the above-described temperature sensor 11, the pressure sensor 12 is described as sensing the pressure inside the electric compressor, but the motor It is noted that it is not limited to being installed inside the compressor, but is installed at another position to sense the pressure of the electric compressor.
- the temperature sensor 11 and the pressure sensor 12 are both used as the sensing data for determining the state of the refrigerant in the control unit 30, or the current electric compressor only by the sensing data detected by the temperature sensor 11
- the state of the internal refrigerant may be determined, and the control unit 30 may not be limited to determining the state of the refrigerant by receiving the sensing data sensed by the temperature sensor 11 and the pressure sensor 12.
- the temperature sensor 11 and the pressure sensor 12 may be mounted on the inverter 6 to detect a temperature and pressure fluctuation state inside the electric compressor and transmit the same to the controller 30 to be described later. Note that it is also possible to determine the state of the refrigerant of the current electric compressor by sensing the temperature of the outside air without using the pressure sensor 12.
- a refrigerant is used as a working fluid therein, and the refrigerant may be phase-changed into a liquid phase at a sub-zero temperature condition.
- the temperature sensor 11 detects a current temperature state of the refrigerant, and the pressure
- the detection sensor 12 detects the current pressure of the refrigerant.
- the temperature data and the pressure data are transmitted to the control unit 30 via the inverter 6, and in particular, the temperature sensor 11 is mounted on an inverter located at a position facing the suction port S of the electric compressor. Since the temperature of the refrigerant can be stably sensed, the reliability of the sensed temperature data is improved.
- the pressure sensor 12 detects the pressure of the refrigerant sucked through the suction port S and, through the temperature sensor 11 and the pressure sensor 12, whether the refrigerant is present in a gaseous state or in a liquid state. You can pinpoint if it exists.
- enthalpy is also calculated based on the temperature and pressure data of the refrigerant, and the controller 30 calculates enthalpy data according to the temperature and pressure data detected by the sensing unit 10. Further comprising a calculation unit 50, the enthalpy for the refrigerant inside the current electric compressor in the calculation unit 50 is numerically calculated. Therefore, the refrigerant state of the electric compressor can accurately know whether the liquid phase or the gas phase by combining the temperature, pressure and enthalpy data.
- connection unit 20 is a three-phase coil wound around the stator 4 located inside the electric compressor, and is formed in the Y-connecting shape as a whole. 21 and the second connection 22 and the third connection 23.
- the first connection 21 is wound at the outermost number of times based on the stator 4, and the second connection 22 is wound several times toward the radially inner side of the wound first connection 21.
- the third connection 23 is wound a plurality of times toward the radially inner side of the wound second connection 22.
- the first connection 21, the second connection 22 and the third connection 23 is made of the Y connection based on the neutral point 20a, and electromagnetic force is generated by applying the operating power through the inverter 5.
- the operating power source is DC
- power is selectively applied only to the first connection 21 and the second connection 22 corresponding to two phases of the three-phase coil, and heat is generated by the winding resistance.
- connection part 20 is disposed at the position as close as possible to the flow path 3 corresponding to the passage through which the refrigerant moves.
- the first connection 21 and the second connection 22 are disposed at the position as close as possible so that the refrigerant is liquid. While the first connection 21 and the second connection 22 are generated by the applied power in the state, the liquid refrigerant can be quickly changed into a gaseous refrigerant.
- the liquid refrigerant remaining in the electric compressor 1 is phase-changed to a gas state, and the temperature sensor 11 and the pressure sensor 12 are connected to the first connection 21 and the second connection 22. At the same time as the heat of the refrigerant senses the temperature and pressure is transmitted to the control unit (30).
- the controller 30 provides the driver with the current state information of the motor-driven compressor 1 through the display unit 40 provided on the instrument panel according to the data sensed by the sensor unit 10.
- the display unit 40 is displayed in the form of an icon, and when the refrigerant is changed into a liquid state rather than a gas state, the display unit 40 is displayed or lit in a specific color so that visibility is improved, so that the driver visually and accurately manages the electric compressor 1. Can be carried out.
- Reference numeral 8 not described refers to a shaft.
- the housing 2 is disposed radially with respect to the inner center of the electric compressor, and a flow path 3 for the flow of the refrigerant is formed along the longitudinal direction of the housing 2, the flow path 2 being a stator ( Of the first to third connections (21, 22, 23) of 4) limited to the portion adjacent to the first and second connections (21, 22) of at least two phases to which the operating power for initial alignment of the rotor (7) is applied.
- the position is determined. That is, the first connection 21 and the second connection 22 among the first to third connections 21, 22, and 23 are disposed at the closest positions toward the flow path 3.
- the first connection to the first Since the operating power is applied to only the first and second connections 21 and 22 closest to the flow passage 3 among the three connections 21, 22 and 23, the heat is generated by the winding resistance and thus the flow passage 3 is connected. It is possible to implement the preheating for the refrigerant flowing through it, through which the enthalpy of the refrigerant rises it is possible to escape the liquid compression faster than before the initial operation of the electric compressor (1).
- the connection portion 20 Based on the longitudinal cross-sectional view of (1) is maintained on the lower side, and the gaseous phase refrigerant in the gas state is formed on the upper side, if there is some liquid refrigerant in this way, the connection portion 20 generates heat and the liquid refrigerant to the gaseous refrigerant Phase change is intended to achieve stable operation of the electric compressor (1).
- the liquid refrigerant may be generated at 5 o'clock to 7 o'clock or 4 o'clock to 8 o'clock with respect to the clockwise direction, but may be generated at an increased range or a reduced range, and the connection part 20 generates heat. All phase change to gaseous refrigerant.
- any one of a vehicle or an industrial compressor using refrigerant as a working fluid is selectively used, and the vehicle may be one of a gasoline vehicle, a diesel vehicle, a fuel cell vehicle, or an electric energy vehicle.
- Industrial compressors are limited to those used in various industries.
- the sensing unit 100 that detects a refrigerant state of the motor-compressor 1 and the flow path 3 of the housing 2 in which the refrigerant moves in the motor-compressor are wound adjacent to each other.
- a control unit 300 for controlling a power applied to the connection unit 200 according to a connection unit 200 and sensing data sensed through the detection unit 100;
- a communication module 400 receiving the control signal transmitted from the controller 300 and providing the state information of the current electric compressor to the terminal 5 owned by the manager.
- the communication module 400 may be mounted on the motor compressor 1 together with the control unit 300, or may be mounted on a vehicle or an installation object (not shown) in which the motor compressor 1 is installed, and is owned by an administrator. ) May be used in any one of the smartphone or PDA, and is not necessarily limited to the above-mentioned smartphone or PDA.
- the communication module 400 When the communication module 400 is mounted on the control unit 300, the communication module 400 is independently operated by being given a unique serial number so as not to be confused with other communication modules mounted on the other electric compressor 1. Motor compressors do not cross or malfunction with each other.
- the controller 300 further includes a memory unit 310 in which the sensed data is stored when the sensed data detected by the detector 100 is not transmitted to the manager through the communication module 400.
- a memory unit 310 in which the sensed data is stored when the sensed data detected by the detector 100 is not transmitted to the manager through the communication module 400.
- the sensing data is temporarily stored in the memory unit 310.
- the terminal 5 of the manager can normally receive data, the sensing data is retransmitted repeatedly through the communication module 400. Therefore, the manager does not check the current state information of the electric compressor 1 due to the non-receipt of the sensing data. Failure is minimized.
- the detection unit 100 includes a temperature sensor 110 for detecting a temperature inside the motor compressor, and a pressure sensor 120 for detecting a pressure in the motor compressor.
- the pressure sensor 120 is all mounted on the inverter 6 detects the temperature and pressure fluctuation state inside the electric compressor and transmits it to the controller 300 to be described later.
- the state of the refrigerant may be determined using only the temperature sensor, or the state of the refrigerant may be determined using the pressure sensor simultaneously.
- the installation position is not necessarily limited to the inside of the electric compressor.
- a refrigerant is used as a working fluid therein, and the refrigerant may be phase-changed to a liquid phase at a sub-zero temperature condition.
- the temperature sensor 110 detects a current temperature state of the refrigerant, and the pressure Detection sensor 120 detects the current pressure of the refrigerant.
- the temperature data and the pressure data are transmitted to the control unit 300 via the inverter 6, and in particular, the temperature sensor 110 is mounted on an inverter located at a position facing the suction port S of the electric compressor. Since the temperature of the refrigerant can be stably sensed, the reliability of the sensed temperature data is improved.
- the temperature sensor may be installed at a location other than the above-described location.
- the temperature sensor may be installed outside the vehicle to detect the temperature of the outside air, installed at a position to sense the temperature around the electric compressor, or inside the engine room. Installed in the engine room to detect the temperature of the vehicle, or installed in a position to detect the temperature inside the vehicle can detect the temperature.
- the pressure sensor 120 detects the pressure of the refrigerant sucked through the suction port S, and through the temperature sensor 110 and the pressure sensor 120, whether the current refrigerant exists in a gaseous state or in a liquid state. You can pinpoint if it exists.
- the connection unit 200 is a three-phase coil wound around the stator 4 located inside the electric compressor.
- the connection unit 200 is formed in a Y-connecting shape as a whole, and the first connection 210 and the second connection 220 and the second connection 220 to be described later. It includes three wires 230.
- the first connection 210 is wound a plurality of times on the outermost basis with respect to the stator 4, and the second connection 220 is wound a plurality of times toward the radially inner side of the wound first connection 21.
- the third connection 230 is wound a plurality of times toward the radially inner side of the wound second connection 220.
- the first connection 210, the second connection 220 and the third connection 230 is made of the Y connection based on the neutral point 20a, the electromagnetic force is generated by applying the operating power through the inverter (6).
- the operating power is DC
- power is selectively applied only to the first connection 210 and the second connection 220 corresponding to two phases of the three-phase coil, and heat is generated by the winding resistance.
- connection unit 200 is disposed at the position as close as possible to the flow path 3 corresponding to the passage through which the refrigerant moves, and the refrigerant is disposed in the position as close as possible to the first connection 210 and the second connection 220.
- first connection 210 and the second connection 220 are heated by the applied power, and the refrigerant in the liquid state can be rapidly changed into the refrigerant in the gas state.
- the liquid refrigerant remaining in the electric compressor 1 phase-changes to a gas state
- the temperature sensor 110 and the pressure sensor 120 are connected to the first connection 210 and the second connection 220.
- the temperature and pressure of the refrigerant are sensed and transmitted to the controller 300.
- the control unit 300 provides the driver with the current state information of the electric compressor 1 through the display unit 40 provided in the instrument panel according to the data detected by the detection unit 100, wherein the display unit 40 is the driver.
- the control method of the electric compressor includes the step of performing position alignment with respect to the rotor after power is turned on (ST10), and after the position alignment with respect to the rotor is performed.
- Performing the position alignment with respect to the rotor includes the step of setting the operating position of the rotor and stator of the motor compressor by applying a DC power to the motor compressor for t seconds, the rotor and the stator
- the operating position when the first DC power is applied to the electric compressor for t seconds, the DC power is applied only to the first connection 21 and the second connection 22 so that a specific pole (N pole, S pole) can be set.
- N pole, S pole a specific pole
- the polarity is formed, and the electromagnetic force of the magnet and the stator provided in the rotor with different polarities is maintained to maintain the ready state for stable operation of the electric compressor.
- the coolant inside the electric compressor After determining the state of the coolant as described above (ST10), it is necessary to determine whether the coolant inside the electric compressor is in a liquid state or a vapor phase (ST20). For this purpose, the temperature inside the electric compressor is sensed (ST22), and The pressure is detected (ST24) to determine whether the refrigerant inside the compressor is a liquid phase or a gas phase.
- the temperature inside the motor compressor is minus 20 degrees, and when the pressure is detected as 1000 kPa, the current exists inside the motor compressor.
- the refrigerant may be determined to be in the liquid phase section indicated by A in the upper left corner.
- the refrigerant indicated by B represents a refrigerant present in a gaseous state at an image temperature condition.
- the left side of the P-H diagram may be defined as a gaseous state on the right side of the liquid phase.
- the current transmission is performed through an enthalpy determination (ST26) that numerically calculates an enthalpy through the temperature data and the pressure data. Know the state of the refrigerant inside the compressor.
- the enthalpy determination (ST26) can be calculated numerically by inputting a program for calculating the enthalpy to the control unit, so that the above-mentioned temperature data, pressure data, and enthalpy data can be combined to accurately determine the current state of the medium of the electric compressor.
- the enthalpy corresponding to 25kj / kg is numerically calculated and the state of the current refrigerant is liquid. It is judged correctly. Therefore, an error does not occur in determining the refrigerant state of the electric compressor refrigerant, and thus an accurate determination is made.
- a first preheating step of differently controlling the intensity and the application time of the DC power applied to the electric compressor can be rapidly changed into a gaseous refrigerant.
- the DC power can be changed to the gaseous refrigerant quickly even when the amount of the liquid refrigerant is large. Can be.
- the step (ST30) of preheating the refrigerant further includes a second preheating step (ST34) of controlling the intensity and the application time of the DC power applied to the electric compressor after the first preheating step.
- a second preheating step (ST34) of controlling the intensity and the application time of the DC power applied to the electric compressor after the first preheating step if the DC power is increased for a long time and applied to an electric compressor, it may cause unnecessary power consumption. Therefore, it may be different depending on the amount of refrigerant in the liquid refrigerant.
- the strength and time of the DC power supply are changed. During the time, the intensity and time of the DC power supply are kept constant, and preheating of some of the remaining liquid refrigerant may be performed.
- the liquid refrigerant generated inside the motor compressor can be used stably by changing the phase of the liquid refrigerant quickly and stably through the change of the intensity and time of the DC power applied to change the gas phase refrigerant. Efficiency can be improved in oil separation due to compression.
- a refrigerant state rechecking step ST36 for re-determining whether the state of the refrigerant is in the liquid state or the gas phase is further included.
- the temperature and the pressure inside the electric compressor are repeatedly detected.
- the enthalpy is also recalculated to determine the exact state of the refrigerant remaining inside the electric compressor.
- the liquid refrigerant remaining in the electric compressor is changed into gaseous refrigerant through real time communication with the manager, unlike the above-described embodiment. do.
- the present invention provides a step (ST100) of performing a position alignment with respect to the rotor after the power is turned on in the electric compressor, and determining whether the refrigerant is a liquid phase or a gaseous state after the alignment with respect to the rotor is performed.
- a state determination step (ST200) an information providing step of providing status information of a current electric compressor to a manager according to a refrigerant state inside the motor compressor (ST300), and power supply to the motor compressor according to the control command of the manager; Applying and preheating the refrigerant (ST400); And controlling the electric compressor to a normal operating state after the preheating is performed (ST500).
- step ST100 of performing the position alignment with respect to the rotor and the state determination of the refrigerant state ST200 determining whether the refrigerant is a liquid phase or a gaseous phase after the position alignment with respect to the rotor are performed, the detailed description will be made. Omit.
- the information providing step of providing the administrator with the current state of the electric compressor includes the step of connecting the communication with the server through a communication module provided in the mounting object on which the electric compressor is mounted (ST310), and the refrigerant of the electric compressor.
- the state information on the terminal is displayed on the terminal owned by the administrator (ST320).
- the manager can provide it to the manager so that the manager can accurately determine the state of the electric compressor even at a remote location. have.
- the communication module provided in the mounting object equipped with a motor-compressor is capable of transmitting and receiving data with a smartphone owned by the administrator, and the above-mentioned state in which an application for checking the status information of the motor-compressor is installed on the smartphone owned by the manager. Data transmission and reception are performed.
- Various data can be transmitted as the state information on the refrigerant, and the above state information of the refrigerant, numerical information according to temperature, pressure, and enthalpy, and state information of the weekly and monthly electric motor compressors can be collectively displayed. Status information of the current electric compressor may be displayed.
- the information providing step (ST300) of providing the manager with the state information of the current electric compressor may be visually recognizable around the instrument panel located in the driver's seat of the vehicle or linked with a smartphone owned by the manager as described above. have.
- the manager can visually accurately recognize the current state of the electric compressor in the state of boarding the vehicle, and can perform maintenance and management, thereby improving durability, safety, and efficiency of the electric compressor.
- Performing preheating for the refrigerant is a step of immediately preheating the refrigerant by applying a DC power to the electric compressor when a control command is transmitted through the manager (ST410) and the manager And a status information repetition notification step (ST420) of repeatedly providing additional status information of the electric compressor to the manager for N times when the control command has not been transmitted.
- the pre-heating for the liquid refrigerant is made only when the manager transmits a control command to the communication module, and if the control command is not received for a predetermined time, whether or not the preheating is repeatedly performed is transmitted to the manager. do.
- the motor-driven compressor is automatically controlled by a preset power source (ST430).
- ST430 a preset power source
- a control method of an electric compressor according to a fifth embodiment of the present invention will be described with reference to the drawings.
- the present embodiment is characterized in that the liquid phase refrigerant generated in the interior of the electric compressor is automatically changed into gaseous refrigerant even without the manager's approval even when the vehicle is turned off.
- the present embodiment is a refrigerant state determination step (ST1000) of determining whether the refrigerant located in the interior of the electric compressor is a liquid state or the gas phase in the state that the start of the vehicle off, and the refrigerant Performing preheating of the refrigerant by applying power to the electric compressor according to a state regardless of whether the vehicle is started or not (ST2000); And transmitting the state information of the current electric compressor to the manager after the preheating is performed (ST3000).
- ST1000 refrigerant state determination step of determining whether the refrigerant located in the interior of the electric compressor is a liquid state or the gas phase in the state that the start of the vehicle off, and the refrigerant Performing preheating of the refrigerant by applying power to the electric compressor according to a state regardless of whether the vehicle is started or not (ST2000); And transmitting the state information of the current electric compressor to the manager after the preheating is performed (ST3000).
- Refrigerant state determination step (ST1000) of determining whether the refrigerant is a liquid phase or a gas phase periodically determines the refrigerant state of the electric compressor (ST1100), when the refrigerant is supplied for a long time in a low temperature temperature condition from the gas state to the liquid state While it may be changed into a difficult state to compress, in the present embodiment, the state of the refrigerant is periodically determined to determine whether the gas state is maintained or changed to the liquid state.
- the refrigerant used inside the motor compressor is R1234yf
- the current temperature of the refrigerant is minus 20 degrees and the pressure is detected as 1000 kPa
- the refrigerant currently in the motor compressor is A in the upper left corner. It can be determined that the liquid phase is represented by.
- the enthalpy through the temperature data and the pressure data is numerically calculated to determine the current state of the refrigerant in the motor compressor. Can be identified.
- the enthalpy can be numerically calculated by inputting a program for calculating the enthalpy to the controller, the above-mentioned temperature data, pressure data, and enthalpy data can be combined to accurately determine the current state of the medium of the electric compressor.
- the strength and application time of the DC power applied to the motor-driven compressor are constantly applied for t1 hours (ST2100), and the power is applied to the motor-compressor for t1 hours.
- the power applied to the electric compressor is controlled to be in an off state (ST2200).
- the intensity of the DC power and the time of t1 are set according to the temperature.
- the present embodiment is a phase change to the liquid cold vein gas phase refrigerant while the DC power is applied for a time of t1 through a relay (not shown) because the DC power is applied to the electric compressor with or without starting.
- the power applied to the connection part of the electric compressor is switched to the off state, and the state in which the refrigerant of the current electric compressor is changed into the gaseous refrigerant is transmitted to the manager (ST3000).
- the electric compressor and its control method according to an embodiment of the present invention can be used in a vehicle equipped with a compressor for compressing a refrigerant or an industrial compressor using a refrigerant as a working fluid.
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- Compressor (AREA)
Abstract
Description
Claims (23)
- 전동 압축기의 냉매 상태를 감지하기 위한 감지부(10);상기 전동 압축기의 내부에서 냉매가 이동하는 하우징(2)의 유로(3)와 인접한 위치에 권취된 결선부(20); 및상기 감지부(10)를 통해 감지된 감지 데이터에 따라 상기 결선부(20)에 인가되는 전원을 서로 상이하게 제어하여 상기 냉매의 상태에 따른 제어를 실시하는 제어부(30)를 포함하는 전동 압축기.
- 상기 감지부(10)는,상기 전동 압축기의 온도를 감지하는 온도 감지 센서(11)를 포함하는 전동 압축기.
- 상기 감지부(10)는,상기 전동 압축기의 압력을 감지하는 압력 감지 센서(12)를 더 포함하는 전동 압축기.
- 상기 결선부(20)는,상기 전동 압축기의 내부에 위치된 스테이터(4)에 권취된 3상 코일로 이루어지고, 상기 전동 압축기의 내부에 위치된 스테이터(4)를 기준으로 최 외곽에 다수회 권취된 제1 결선(21);상기 권취된 제1 결선(21)의 반경 방향 내측을 향해 다수회 권취된 제2 결선(22);상기 권취된 제2 결선(22)의 반경 방향 내측을 향해 다수회 권취된 제3 결선(23)을 포함하는 전동 압축기.
- 제1 항에 있어서,상기 제어부(30)는,상기 감지부(10)에서 감지된 데이터에 따라 전동 압축기의 현재 상태 정보를 계기판에 구비된 표시부(40)를 통해 운전자에게 제공하는 것을 특징으로 하는 전동 압축기.
- 제1 항에 있어서,상기 제어부(30)는,상기 감지부(10)를 통해 감지된 감지 데이터에 따른 엔탈피 데이터가 연산되는 연산부(50)를 더 포함하는 전동 압축기.
- 전동 압축기의 냉매 상태를 감지하는 감지부(10);상기 전동 압축기의 내부에서 냉매가 이동하는 하우징(2)의 유로(3)와 인접하여 권취된 결선부(20);상기 감지부(10)를 통해 감지된 감지 데이터에 따라 상기 결선부(20)에 인가되는 전원을 제어하는 제어부(30); 및상기 제어부(30)에서 전송된 제어 신호를 전달받아 관리자가 소유한 단말기(5)로 현재 전동 압축기의 상태 정보를 제공하는 통신 모듈(400)을 포함하는 전동 압축기.
- 제7 항에 있어서,상기 제어부(30)는,상기 감지부(10)에서 감지된 감지 데이터가 통신 모듈(400)을 통해 관리자에게 전송되지 못할 경우 상기 감지 데이터가 저장되는 메모리 부(310)를 더 포함하고,상기 관리자가 차량에 탑승할 경우 상기 메모리 부(310)에 저장된 감지 데이터에 대한 정보를 계기판에 구비된 표시부(40)를 통해 운전자에게 제공하는 것을 특징으로 하는 전동 압축기.
- 제1 항 내지 제8 항 중 어느 한 항에 따른 압축기는 냉매를 작동 유체로 사용하는 차량 또는 산업용 압축기 중의 어느 하나가 선택적으로 사용되는 전동 압축기.
- 전동 압축기에 전원이 온(On)된 이후에 로터에 대한 위치 정렬을 실시하는 단계(ST10);상기 로터에 대한 위치 정렬이 이루어진 이후에 냉매가 액상 인지 기상인지 판단하는 냉매 상태 판단 단계(ST20);상기 냉매의 상태에 따라 전동 압축기로 전원을 인가하여 냉매에 대한 프리히팅을 실시하는 단계(ST30); 및상기 프리히팅이 이루어진 이후에 상기 전동 압축기를 정상 작동 상태로 제어하는 단계(ST40)를 포함하는 전동 압축기의 제어 방법.
- 제10 항에 있어서,상기 로터에 대한 위치 정렬을 실시하는 단계(ST10)는,상기 전동 압축기에 직류 전원을 t초간 인가하여 전동 압축기의 로터와 스테이터의 작동 위치를 셋팅하는 단계(ST12)를 포함하는 전동 압축기의 제어 방법.
- 제10 항에 있어서,상기 냉매 상태 판단 단계(ST20)는,상기 전동 압축기 내부의 온도를 감지하는 온도 감지 단계(ST22);상기 전동 압축기 내부의 압력을 감지하는 압력 감지 단계(ST24)를 포함하는 전동 압축기의 제어 방법.
- 제12 항에 있어서,상기 냉매 상태 판단 단계(ST20)는,상기 전동 압축기 내부의 온도와 압력에 따른 엔탈피 데이터를 함께 판단하는 엔탈피 판단 단계(ST26)를 더 포함하는 전동 압축기의 제어 방법.
- 제10 항에 있어서,상기 냉매에 대한 프리히팅을 실시하는 단계(ST30)는,상기 전동 압축기에 인가되는 직류 전원의 세기와 인가 시간을 서로 다르게 제어하는 제1 프리 히팅 단계(ST32)를 포함하는 전동 압축기의 제어 방법.
- 제14 항에 있어서,상기 냉매에 대한 프리히팅을 실시하는 단계(ST30)는,상기 제1 프리 히팅 단계 이후에 상기 전동 압축기에 인가되는 직류 전원의 세기와 인가 시간을 일정하게 제어하는 제2 프리 히팅 단계(ST34)를 더 포함하는 전동 압축기의 제어 방법.
- 제10 항에 있어서,상기 냉매에 대한 프리히팅을 실시하는 단계(ST30)는,상기 냉매에 대한 프리히팅이 이루어지는 동안 현재 냉매의 상태가 액상 인지 기상인지 재 판단하는 냉매 상태 재확인 단계(ST36)를 더 포함하는 전동 압축기의 제어 방법.
- 전동 압축기에 전원이 온(On)된 이후에 로터에 대한 위치 정렬을 실시하는 단계(ST100);상기 로터에 대한 위치 정렬이 이루어진 이후에 냉매가 액상 인지 기상인지 판단하는 냉매 상태 판단 단계(ST200);상기 전동 압축기 내부의 냉매 상태에 따라 관리자에게 현재 전동 압축기의 상태 정보를 제공하는 정보 제공 단계(ST300);상기 관리자의 제어 명령 유무에 따라 상기 전동 압축기로 전원을 인가하여 냉매에 대한 프리히팅을 실시하는 단계(ST400); 및상기 프리히팅이 이루어진 이후에 상기 전동 압축기를 정상 작동 상태로 제어하는 단계(ST500)를 포함하는 전동 압축기의 제어 방법.
- 제17 항에 있어서,상기 관리자에게 현재 전동 압축기의 상태 정보를 제공하는 정보 제공 단계(ST300)는,상기 전동 압축기가 장착된 장착 대상물에 구비된 통신 모듈을 통해 서버와 통신을 접속하는 단계(ST310);상기 전동 압축기의 냉매에 대한 상태 정보가 관리자가 소유한 단말기에 표시되는 단계(ST320)를 포함하는 전동 압축기의 제어 방법.
- 제17 항에 있어서,상기 냉매에 대한 프리히팅을 실시하는 단계(ST400)는,상기 관리자를 통해 제어 명령이 수신된 경우 상기 전동 압축기에 직류 전원을 인가하여 냉매에 대한 프리 히팅을 즉시 실시하는 단계(ST410);상기 관리자를 통해 제어 명령이 미 전송된 경우 상기 관리자에게 N회 동안 반복적으로 전동 압축기의 상태 정보를 추가로 제공하는 상태 정보 반복 알림 단계(ST420)를 포함하는 전동 압축기의 제어 방법.
- 제19 항에 있어서,상기 냉매에 대한 프리히팅을 실시하는 단계(ST400)는,상기 상태 정보 반복 알림 단계(ST420)이후에도 관리자를 통한 제어 명령이 수신되지 않을 경우 기 설정된 전원으로 상기 전동 압축기를 자동 제어하는 단계(ST430)를 더 포함하는 전동 압축기의 제어 방법.
- 차량의 시동이 오프된 상태에서 전동 압축기의 내부에 위치된 냉매가 액상 인지 기상인지 판단하는 냉매 상태 판단 단계(ST1000);상기 냉매의 상태에 따라 상기 차량의 시동 유무에 상관없이 상기 전동 압축기로 전원을 인가하여 냉매에 대한 프리히팅을 실시하는 단계(ST2000); 및상기 프리히팅이 이루어진 이후에 관리자에게 현재 전동 압축기의 상태 정보를 전송하는 단계(ST3000)를 포함하는 전동 압축기의 제어 방법.
- 제21 항에 있어서,상기 냉매가 액상 인지 기상인지 판단하는 냉매 상태 판단 단계(ST1000)는 주기적으로 상기 전동 압축기의 냉매 상태를 판단하는 단계(ST1100)를 포함하는 전동 압축기의 제어 방법.
- 제21 항에 있어서,상기 냉매에 대한 프리히팅을 실시하는 단계(ST2000)는,상기 전동 압축기에 인가되는 직류 전원의 세기와 인가 시간을 t1 시간 동안 일정하게 인가하는 전원 인가 단계(ST2100);상기 전동 압축기로 t1 시간 동안 전원을 인가한 이후에 상기 전동 압축기로 인가되는 전원을 오프 상태로 제어하는 단계(ST2200)를 포함하는 전동 압축기의 제어 방법.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112015000134.4T DE112015000134T5 (de) | 2014-04-11 | 2015-04-10 | Elektrischer Kompressor und Verfahren zum Steuern desselben |
| US14/910,282 US10309699B2 (en) | 2014-04-11 | 2015-04-10 | Electric compressor and method for controlling same |
| CN201580001560.1A CN105579708B (zh) | 2014-04-11 | 2015-04-10 | 电动压缩机及其控制方法 |
| US16/389,351 US20190242629A1 (en) | 2014-04-11 | 2019-04-19 | Method of controlling electric compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| KR20140043752 | 2014-04-11 | ||
| KR10-2014-0043752 | 2014-04-11 | ||
| KR1020150050908A KR102138567B1 (ko) | 2014-04-11 | 2015-04-10 | 전동 압축기 및 이의 제어방법 |
| KR10-2015-0050908 | 2015-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| US14/910,282 A-371-Of-International US10309699B2 (en) | 2014-04-11 | 2015-04-10 | Electric compressor and method for controlling same |
| US16/389,351 Division US20190242629A1 (en) | 2014-04-11 | 2019-04-19 | Method of controlling electric compressor |
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| WO2015156647A1 true WO2015156647A1 (ko) | 2015-10-15 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0875274A (ja) * | 1994-09-05 | 1996-03-19 | Sanyo Electric Co Ltd | 冷凍装置 |
| JPH09113039A (ja) * | 1995-10-16 | 1997-05-02 | Matsushita Refrig Co Ltd | 圧縮機の加熱装置 |
| JP2001065478A (ja) * | 1999-08-30 | 2001-03-16 | Daikin Ind Ltd | スクリュー圧縮機 |
| JP2007162572A (ja) * | 2005-12-14 | 2007-06-28 | Sanden Corp | 電動圧縮機 |
| KR20100129491A (ko) * | 2009-06-01 | 2010-12-09 | (주)한국유체 | 스크류 압축기용 디지털 제어장치 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0875274A (ja) * | 1994-09-05 | 1996-03-19 | Sanyo Electric Co Ltd | 冷凍装置 |
| JPH09113039A (ja) * | 1995-10-16 | 1997-05-02 | Matsushita Refrig Co Ltd | 圧縮機の加熱装置 |
| JP2001065478A (ja) * | 1999-08-30 | 2001-03-16 | Daikin Ind Ltd | スクリュー圧縮機 |
| JP2007162572A (ja) * | 2005-12-14 | 2007-06-28 | Sanden Corp | 電動圧縮機 |
| KR20100129491A (ko) * | 2009-06-01 | 2010-12-09 | (주)한국유체 | 스크류 압축기용 디지털 제어장치 |
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