WO2007119641A1 - 空調装置 - Google Patents
空調装置 Download PDFInfo
- Publication number
- WO2007119641A1 WO2007119641A1 PCT/JP2007/057374 JP2007057374W WO2007119641A1 WO 2007119641 A1 WO2007119641 A1 WO 2007119641A1 JP 2007057374 W JP2007057374 W JP 2007057374W WO 2007119641 A1 WO2007119641 A1 WO 2007119641A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- air conditioner
- solenoid
- valve
- control
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1822—Valve-controlled fluid connection
- F04B2027/1827—Valve-controlled fluid connection between crankcase and discharge chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/184—Valve controlling parameter
- F04B2027/1854—External parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/184—Valve controlling parameter
- F04B2027/1859—Suction pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/54—Heating and cooling, simultaneously or alternatively
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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
- 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
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0403—Refrigeration circuit bypassing means for the condenser
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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
- 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
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube
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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
- 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
- F25B2400/07—Details of compressors or related parts
- F25B2400/076—Details of compressors or related parts having multiple cylinders driven by a rotating swash plate
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/027—Compressor control by controlling pressure
- F25B2600/0271—Compressor control by controlling pressure the discharge pressure
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
Definitions
- the present invention relates to an air conditioner capable of heating operation using high-temperature and high-pressure gas in a refrigeration cycle.
- Patent Document 1 auxiliary heating that assists the heating capacity of the hot water heater by guiding the high-temperature and high-pressure gas in the refrigeration cycle to the evaporator and heating the air flowing in the air conditioning duct through the evaporator.
- a vehicle air conditioner that can be operated is disclosed. The compressor of the vehicle air conditioner is ONZOFF controlled based on the detection signal of the high pressure refrigerant pressure sensor.
- Patent Document 1 Japanese Patent Application Laid-Open No. 5-223357
- the pressure in the control chamber is adjusted by adjusting the opening of a control valve having a pressure sensing mechanism that senses the low-pressure side pressure of the refrigeration cycle and energizes the valve element and a solenoid that energizes the valve element in response to an input current.
- air conditioners equipped with variable displacement compressors that variably control discharge capacity by changing the above are being installed in vehicles.
- the low pressure side pressure of the refrigeration cycle is sensed by the pressure sensing mechanism of the variable capacity compressor, and the discharge capacity of the variable capacity compressor is variably controlled so as to autonomously control the pressure to a predetermined value.
- the cabin cooling temperature is autonomously controlled to a predetermined value.
- variable capacity compressors provided in conventional in-vehicle air conditioners are configured to variably control the discharge capacity and autonomously control the low-pressure side pressure of the refrigeration cycle to a predetermined value, so the discharge capacity is variably controlled.
- heating operation in which the high-pressure side pressure of the refrigeration cycle is autonomously controlled to a predetermined value and the vehicle compartment heating temperature is autonomously controlled to a predetermined value is impossible.
- the present invention has been made in view of the above problems, and includes a pressure-sensitive mechanism that senses a low-pressure side pressure in a refrigeration cycle and energizes the valve element, and a solenoid that energizes the valve element in response to an input current.
- a variable displacement compressor that variably controls the discharge capacity by changing the pressure in the control chamber by adjusting the opening of the control valve having a control valve, and a control device that adjusts the opening of the control valve by controlling the energization state of the solenoid
- the air conditioner is capable of switching between cooling operation and heating operation using high-temperature and high-pressure gas in the refrigeration cycle, and variably controls the discharge capacity of the variable capacity compressor to cool the cabin cooling temperature. It is an object of the present invention to provide an air conditioner capable of performing a cooling operation for controlling the vehicle interior temperature to a predetermined value and a heating operation for controlling the vehicle compartment heating temperature to a predetermined value by variably controlling the discharge capacity of the variable capacity compressor.
- a pressure sensing mechanism for energizing the valve body by sensing the low-pressure side pressure of the refrigeration cycle, and energizing the valve body in accordance with an input current.
- a variable capacity compressor that variably controls the discharge capacity by changing the pressure in the control chamber by adjusting the opening degree of the control valve having a solenoid that controls, and the control device that adjusts the opening degree of the control valve by controlling the energization state of the solenoid
- the air conditioner is capable of switching between a cooling operation and a heating operation using high-temperature and high-pressure gas during the refrigeration cycle, and the control device detects the low-pressure side of the refrigeration cycle sensed by the pressure-sensitive mechanism during the cooling operation.
- Control valve operates in response to the pressure and the energization amount of the solenoid, and does not respond to the refrigerant pressure sensed by the pressure sensing mechanism during heating operation, but operates only in response to the energization amount of the solenoid.
- Control solenoid energization Provide an air conditioner characterized by control.
- the discharge capacity of the variable capacity compressor is operated while operating the control valve in response to the low-pressure side pressure of the refrigeration cycle detected by the pressure-sensitive mechanism and the energization amount of the solenoid.
- the low-pressure side pressure of the refrigeration cycle can be autonomously controlled to a predetermined value, and the cooling temperature can be controlled to a predetermined value.
- the control valve is operated only in response to the energization amount of the solenoid without responding to the low-pressure side pressure of the refrigeration cycle sensed by the pressure-sensitive mechanism, so that the high-pressure side pressure of the refrigeration cycle is set to a predetermined value.
- the heating temperature can be controlled to a predetermined value.
- a diode is connected in parallel to the solenoid to form a flywheel circuit, and the control device opens and closes the switching element at a predetermined frequency and adjusts the duty ratio that is the ONZOFF ratio.
- the switching element is driven at the first frequency at which the flywheel circuit can obtain a current smoothing action, and during the heating operation, the current smoothing action by the flywheel circuit cannot be obtained at a lower frequency than the first frequency.
- the switching element is driven at two frequencies.
- the duty ratio is adjusted while driving the switching element at the first frequency that allows the current to be smoothed by the flywheel circuit, thereby adjusting the solenoid current and variably controlling the opening of the control valve.
- the low-pressure side pressure of the refrigeration cycle can be autonomously controlled to a predetermined value, and thus the cooling temperature can be controlled to a predetermined value.
- the energization amount of the solenoid is adjusted by adjusting the duty ratio while driving the switching element at the second frequency that is lower than the first frequency and cannot obtain the current smoothing action by the flywheel circuit.
- the ratio between the fully open time and the fully closed time of the control valve can be variably controlled, the high-pressure side pressure of the refrigeration cycle can be controlled to a predetermined value, and the heating temperature can be controlled to a predetermined value.
- control device has detection means for detecting the high-pressure side refrigerant pressure or the high-pressure side refrigerant temperature in the refrigeration cycle, and the detection value of the detection means is within a predetermined range during heating operation. So that the switching element is driven at the second frequency and with the duty ratio changed.
- Comfortable heating can be obtained by controlling the high-pressure side refrigerant pressure or the high-pressure side refrigerant temperature in the refrigeration cycle within a predetermined range during heating operation.
- the detection value of the detection means when the detection value of the detection means reaches an upper limit value that deviates from the set region to the high pressure side or the high temperature side during heating operation, the discharge capacity of the compressor is increased.
- the duty ratio of the switching element is controlled so as to be minimized, or the operation of the compressor is stopped.
- the switching element is set so that the discharge capacity of the compressor is minimized.
- control device has a duty equal to or greater than a predetermined value during heating operation.
- the duty ratio is changed to less than the predetermined value.
- control device controls the duty ratio so that the discharge capacity of the compressor is minimized when a duty ratio of a predetermined value or more continues continuously for a predetermined time during heating operation, or Stop the compressor.
- the duty ratio is changed to less than the predetermined value, or the duty ratio is controlled so that the discharge capacity of the compressor is minimized, or the compressor By stopping the operation, the temperature rise of the solenoid can be suppressed within an appropriate range.
- the detection means for detecting the high-pressure side refrigerant pressure or the high-pressure side refrigerant temperature in the refrigeration cycle is arranged upstream of the refrigerant circuit switching valve that controls switching between cooling operation and heating operation. It is set up.
- the detection means for detecting the high-pressure side refrigerant pressure or the high-pressure side refrigerant temperature can be used in both the cooling operation and the heating operation, the configuration of the air conditioner is simplified. .
- a check valve is disposed in the discharge path of the variable capacity compressor, and the detection means for detecting the high-pressure side refrigerant pressure detects the pressure upstream of the check valve. .
- the detection means for detecting the high-pressure side refrigerant pressure detects the pressure upstream from the check valve, if the check valve is abnormal and does not open, the upstream abnormal pressure is detected quickly. It is possible to avoid the occurrence of a situation that impairs the safety of the air conditioner.
- the variable capacity compressor is operated while operating the control valve in response to the low-pressure side pressure of the refrigeration cycle detected by the pressure-sensitive mechanism and the energization amount of the solenoid.
- the low-pressure side pressure of the refrigeration cycle can be autonomously controlled to a predetermined value, and thus the cooling temperature can be controlled to a predetermined value.
- Heating luck on the other hand
- the control valve is operated in response to only the energization amount of the solenoid without responding to the low pressure side pressure of the refrigeration cycle sensed by the pressure sensing mechanism, thereby controlling the high pressure side pressure of the refrigeration cycle to a predetermined value.
- the heating temperature can be controlled to a predetermined value.
- a vehicle air conditioner 1 includes a first refrigerant circulation circuit (hereinafter referred to as a refrigeration circuit) 10, a second refrigerant circulation circuit (hereinafter referred to as a hot gas no-pass circuit) 11, and a refrigeration circuit 10. And a first solenoid valve 12 and a second solenoid valve 13 for switching between the hot gas bypass circuit 11 and the hot gas bypass circuit 11.
- the refrigeration circuit 10 supplies high-temperature and high-pressure gas refrigerant discharged from the discharge port of the variable capacity compressor 100 to the first solenoid valve 12, the capacitor 14, the receiver 15, the check valve 16, the expansion valve 17, the evaporator 18 and the accumulator.
- the hot gas bypass circuit 11 is a variable-capacity compressor that discharges the high-temperature and high-pressure gas refrigerant discharged from the discharge port of the variable-capacity compressor 100 via the second solenoid valve 13, the fixed throttle 20, the evaporator 18, and the accumulator 19.
- This is a refrigerant circulation circuit that recirculates to the compressor 100.
- the evaporator 18 When the refrigerant circulates in the refrigeration circuit 10, the evaporator 18 functions as a cooling heat exchanger that evaporates the low-temperature gas-liquid two-phase refrigerant flowing from the expansion valve 17 and cools the passing air.
- the refrigerant circulates through the bypass circuit 11 it functions as a heating heat exchanger (auxiliary heating device) that heats the air passing by the high-temperature gas refrigerant flowing from the fixed throttle 20.
- the variable capacity compressor 100 includes a cylinder block 101 having a plurality of cylinder bores 101a, a front housing 102 provided at one end of the cylinder block 101, and a valve plate 103.
- a rear housing 104 provided at the other end of the cylinder block 101 is provided.
- a drive shaft 106 is disposed across the crank chamber 105 defined by the cylinder block 101 and the front housing 102.
- the drive shaft 106 is inserted through the swash plate 107.
- the swash plate 107 is coupled to a rotor 108 fixed to the drive shaft 106 via a connecting portion 109 and is supported by the drive shaft 106 so that the tilt angle is variable.
- a coil panel 110 that urges the swash plate 107 in the direction of decreasing the tilt angle is disposed.
- a coil panel ill for urging the swash plate 107 in the minimum tilt state in the direction of increasing the tilt angle is provided.
- One end of the drive shaft 106 extends through the boss portion 102a of the front housing 102 to the outside of the housing, and is directly connected to a vehicle engine (not shown) via a power transmission device (not shown) via an electromagnetic clutch. ing.
- a shaft sealing device 112 is disposed between the drive shaft 106 and the boss portion 102a.
- the drive shaft 106 is supported in the radial direction and the thrust direction by bearings 113, 114, 115, and 116.
- a piston 117 is disposed in the cylinder bore 101a, and a pair of shrouds 118 housed in a recess 117a at one end of the piston 117 sandwich the outer peripheral portion of the swash plate 107 so as to be slidable relative to each other.
- the rotation of the drive shaft 106 is converted into the reciprocating motion of the piston 117 via the swash plate 107 and the shoe 118.
- a suction chamber 119 and a discharge chamber 120 are formed in the rear housing 104.
- the suction chamber 119 communicates with the cylinder bore 101a through a communication hole 103a formed in the valve plate 103 and a suction valve (not shown), and the discharge chamber 120 communicates with a discharge valve (not shown) and a communication hole formed in the valve plate 103.
- the cylinder bore 101a communicates with 103b.
- the suction chamber 119 is connected to the accumulator 19 of the air conditioner 1 through the suction port 104a and piping.
- a muffler 121 is disposed outside the cylinder block 101.
- the muffler 121 is formed by joining a bottomed cylindrical lid member 122 separate from the cylinder block 101 to a cylindrical wall 101b erected on the outer surface of the cylinder block 101 via a seal member.
- a discharge port 122 a is formed in the lid member 122. The discharge port 122a is connected to the solenoid valves 12 and 13 of the air conditioner 1 through a pipe.
- a communication passage 123 that allows the muffler 121 to communicate with the discharge chamber 120 has a cylinder block 101 and a valve. It is formed over the plate 103 and the rear housing 104. The muffler 121 and the communication path 123 form a discharge path that extends between the discharge chamber 120 and the discharge port 122a. A pressure sensor 124 for detecting the refrigerant pressure in the discharge chamber 120 is attached to the rear housing 104.
- a check valve 200 for opening and closing an upstream opening connected to the communication path 123 of the muffler 121 is disposed in the muffler 121.
- the check valve 200 closes the upstream opening and shuts off the discharge path extending between the discharge chamber 120 and the discharge port 122a when the differential pressure across the valve body is smaller than a predetermined value.
- the upstream opening is opened to open the discharge path.
- the front housing 102, the cylinder block 101, the valve plate 103, and the rear housing 104 are adjacent to each other via a gasket, and are integrally assembled using a plurality of through bolts.
- a capacity control valve 300 is attached to the rear housing 104.
- the capacity control valve 300 adjusts the opening of the communication passage 125 between the discharge chamber 120 and the crank chamber 105, and controls the amount of refrigerant gas discharged into the crank chamber 105.
- the refrigerant gas in the crank chamber 105 is sucked through the gaps between the bearings 115 and 116 and the drive shaft 106, the space 126 formed in the cylinder block 101, and the orifice hole 103c formed in the valve plate 103.
- the capacity control valve 300 flowing into the chamber 119, the internal pressure of the crank chamber 105 can be variably controlled, and the discharge capacity of the variable capacity compressor 100 can be variably controlled.
- the capacity control valve 300 adjusts the energization amount to the built-in solenoid based on the external signal, variably controls the discharge capacity of the variable capacity compressor 100 so that the internal pressure of the suction chamber 119 becomes a predetermined value, and is also built-in.
- the communication passage 125 is forcibly opened by turning off the energization of the solenoid to be controlled, and the discharge capacity of the variable capacity compressor 100 is controlled to the minimum.
- the discharge capacity control valve 300 is disposed in a pressure-sensitive chamber 302 formed in the nozzle housing 301, and is disposed in the suction chamber 119 via a communication hole 301a and a communication passage 127.
- the bellows 303 that functions as pressure-sensitive means that receives the pressure (hereinafter referred to as suction pressure), evacuates the inside, and is provided with a spring, and one end portion is disposed in a valve chamber 312 formed in the valve housing 301. Is installed to receive the pressure in the crank chamber 105 (hereinafter referred to as the crank chamber pressure), open and close the valve hole 305a disposed in the communication passage 125 between the discharge chamber 120 and the crank chamber 105, and open the other end.
- the valve body 304 is slidably supported in the support hole 301b of the valve ring and the bossing 301, and the other end is connected to the bellows 303, and the valve hole 305a and the valve seat 305b are formed in the housing hole 301c of the valve housing 301.
- a press-fitted and fixed valve seat forming body 305 and a solenoid rod 304a, which is integrally formed with the valve body 304 and press-fixed the movable iron core 306 at one end, and the solenoid rod 304a are inserted and opposed to the movable iron core 306 with a predetermined gap.
- the fixed iron core 307 is disposed, the spring 307 disposed between the fixed iron core 307 and the movable iron core 306 and biasing the movable iron core 306 in the valve opening direction, and the fixed iron core 307 and the movable iron core 306 are interpolated.
- the cylindrical member 310 fixed to the solenoid case 309 and the cylinder Surrounds the member 310, is composed of the contained electric magnetic coil 311. the solenoid case 309, Ru.
- the pressure sensing chamber 302 and the bellows 303 constitute a pressure sensing mechanism 300A that senses the suction pressure and biases the valve body 304.
- the solenoid rod 304a, the movable iron core 306, the fixed iron core 307, the cylindrical member 310, the electromagnetic coil 311 and the solenoid case 309 constitute a solenoid 300B that urges the valve body 304 in accordance with the input current.
- the node 308 forcibly opens the valve body 304 when the solenoid 300B is demagnetized.
- the other end of the valve body 304 connected to the bellows 303 is cut off from the accommodation hole 301c, and thus cut off from the discharge chamber 120.
- the valve chamber 312 communicates with the crank chamber 105 through the communication hole 301e and the communication passage 125.
- the communication hole 301d, the accommodation hole 301c, the valve hole 305a, the valve chamber 312, and the communication hole 301e form a part of the communication path 125 between the discharge chamber 120 and the crank chamber 105.
- the vehicle air conditioner 1 includes a control device 400.
- the control device 400 is connected to a vehicle-mounted battery 500.
- the idling switch of the vehicle engine is turned on, DC power is supplied from the vehicle-mounted battery 500 to the control device 400.
- the control device 400 includes a cooling mode using the refrigeration circuit 10 and a hot gas bypass circuit 11.
- Mode switching switch 401 for switching the air-conditioning mode to and from the auxiliary heating mode using the temperature setting switch 402 for setting the temperature in the vehicle interior to a desired temperature, and the air-conditioning switch for commanding the operation or stop of the variable capacity compressor 100
- a command signal is input from 403, an air volume switching switch 404 or the like that switches the air flow of the fan of the evaporator 18.
- the control device 400 includes a passenger compartment temperature sensor 405 for detecting the passenger compartment temperature, an outdoor air temperature sensor 406 for detecting the temperature of the outside air, a solar radiation sensor 407 for detecting the amount of solar radiation incident on the passenger compartment, and an evaporator 18.
- Evacuation temperature sensor 408 that detects the air temperature immediately after passing, cooling water temperature sensor 409 that detects the temperature of the engine cooling water flowing into the hot water heater, pressure in the discharge chamber 120 of the variable capacity compressor 100 (hereinafter referred to as discharge pressure)
- a detection signal is input from the pressure sensor 1 24 that detects the call).
- an air mix door From the control device 400, an air mix door, an air outlet switching door, an inside / outside air switching door (not shown), a fan motor for the condenser 14, a fan motor for the evaporator 18 , the first solenoid valve 12, the second solenoid valve 13, and the control valve 300 Control power is supplied to the electromagnetic coil 311.
- the power supply line to the electromagnetic coil 311 forms a flywheel circuit 411 by arranging the diode 410 in parallel with the electromagnetic coil 311.
- the terminal of the power supply line to the electromagnetic coil 311 is grounded.
- a current sensor 412 for detecting the current value flowing through the flywheel circuit 411 is provided.
- the detection signal of the current sensor 412 is input to the control device 400.
- the power supply to the electromagnetic coil 311 is performed via a switching element, not shown.
- the current value supplied to the electromagnetic coil 311 is controlled by a so-called pulse width modulation method (PWM control) that changes the duty ratio, which is the ONZOFF ratio, while turning the switching element ONZOFF at a predetermined frequency.
- PWM control pulse width modulation method
- the driving force is transmitted to the variable displacement compressor 100 directly connected to the vehicle engine, and DC power is supplied from the vehicle-mounted battery 500 to the control device 400. .
- the control device 400 When the cooling operation mode is selected by the mode switching switch 401, the control device 400 opens the first electromagnetic valve 12, closes the second electromagnetic valve 13, and makes the refrigeration circuit 10 operable. When the control device 400 determines that the condition for operating the compressor 100 is satisfied based on the command signal from each switch and the detection signal of each sensor force, the control device 400 turns the switching element ON and OFF at 400 Hz. In the frequency region near 400 Hz, even if the switching element is turned on, the value of the current flowing through the electromagnetic coil 311 does not increase immediately due to the inductance of the electromagnetic coil 311, and the switching element is turned off before the current value reaches the maximum. Become.
- variable displacement compressor 100 control valve 300 functions as an on-off valve that operates in response to the suction pressure acting on the pressure sensing mechanism 300A and the current flowing through the solenoid 300B.
- the control valve 300 has the suction pressure control characteristic shown in the equation (1) of FIG. Therefore, as shown in FIG. 7, the suction pressure can be variably controlled by changing the energization amount and changing the discharge capacity. Since Sv is only slightly larger than Sr in the equation (1), the control valve 300 has a suction pressure control characteristic that is hardly affected by the discharge pressure Pd.
- the control device 400 receives a command signal from each switch and a detection signal of each sensor force, and sets a target air temperature that should control the air temperature on the outlet side of the evaporator 18 to a predetermined value.
- the control device 400 compares the detection value of the evaporation temperature sensor 408 with the target air temperature, and sets the target control current value based on the difference between the two.
- the control device 400 compares the detection signal from the current sensor 412 with the target control current value, adjusts the duty ratio of the switching element based on the difference between the two, and adjusts the current value flowing through the electromagnetic coil 311.
- the variable capacity compressor 100 so that the detected value of the temperature sensor 408 finally becomes the target air temperature so that the current value becomes the target control current value, and consequently the suction pressure becomes the target suction pressure. Feedback control of the discharge capacity.
- the control device 400 closes the first solenoid valve 12, opens the second solenoid valve 13, and can operate the hot gas bypass circuit 11. To make a state.
- the control device 400 determines that the condition for operating the compressor 100 is satisfied based on the command signal from each switch and the detection signal of each sensor force, the control device 400 turns the switching element ONZOFF at 10 Hz.
- the current value rises to the maximum current determined by the voltage of the on-vehicle battery 500 and the resistance value of the electromagnetic coil 311.
- the electromagnetic force of the solenoid 300B becomes maximum, and the valve body 304 of the control valve 300 moves in a fully closed direction regardless of the suction pressure acting on the bellows 303. Thereafter, when the switching element is turned OFF, the current value decreases to zero.
- the solenoid 300B is demagnetized, and regardless of the suction pressure acting on the bellows 303, the valve body 304 is moved in the fully opened direction by the panel 308. Therefore, in the frequency range near 10 Hz, the control valve 300 functions as an ONZOFF 2-position control on-off valve, and becomes an ON / OFF duty control valve.
- control valve 300 When control valve 300 functions as an ONZOFF duty control valve, the ratio of the fully open time to the fully closed time changes according to the duty ratio.
- the duty ratio is 0%
- the control valve 300 When the duty ratio is 0%, the control valve 300 is always fully open and the discharge capacity of the variable displacement compressor 100 is minimum, and when the duty ratio is 100%, the control valve 300 is always fully closed and the discharge capacity of the variable capacity compressor 100 is maximized. Become. Therefore, by variably controlling the duty ratio between 0% and 100%, the discharge capacity of the variable capacity compressor 100 can be variably controlled between the minimum and maximum.
- the control device 400 receives a command signal from each switch and a detection signal of each sensor force, and sets a target discharge pressure that controls the discharge pressure of the variable capacity compressor 100 to a predetermined value.
- the control device 400 compares the detected value of the pressure sensor 124 with the target discharge pressure, and adjusts the duty ratio of the switching element based on the difference between the two to adjust the ratio between the fully open time and the fully closed time of the control valve 300.
- the discharge capacity of the variable capacity compressor 100 is feedback-controlled so that the detection value of the pressure sensor 124 becomes the target pressure. As a result, the discharge pressure of the variable capacity compressor 100 is controlled to a predetermined value, and the air temperature on the outlet side of the evaporator 18 is controlled to a predetermined value.
- the pressure sensor 124 is disposed upstream of the first solenoid valve 12 and the second solenoid valve 13, it can be used in both the cooling operation and the heating operation. As a result, the configuration of the air conditioner 1 is simplified.
- the pressure sensor 124 is arranged upstream of the check valve 200, when an abnormality occurs in the check valve 200 and there is no opening force, the abnormal pressure of the upstream side is detected quickly, and the air conditioner Occurrence of a situation that impairs safety can be avoided.
- the resistance value of the electromagnetic coil 311 is set to 10 ⁇ or less at room temperature to widen the suction pressure control range. Therefore, when used in the auxiliary heating mode, the continuous energization state may be maintained for a long time, and the temperature of the solenoid 300B may rise and the deterioration of the solenoid 300B may be accelerated. In order to suppress the deterioration of the solenoid 300B, when the predetermined duty ratio continues for a predetermined time in the auxiliary heating mode, the duty ratio is made less than the predetermined value in preference to the high pressure control, or the variable capacity compressor The duty ratio may be controlled to 0% in order to minimize the discharge capacity of 100.
- variable displacement compressor 100 When the variable displacement compressor 100 is connected to the vehicle engine via an electromagnetic clutch, the Pd is in the auxiliary heating mode, and Pd ⁇ Pd ⁇ Pd ⁇ Pd2 deviates from Pd2 to the high pressure side (Pd3 >> Pd2 ), The electromagnetic clutch is turned off and the variable displacement compressor 100 is stopped to ensure the safety of the air conditioner 1.
- the predetermined duty is set in the auxiliary heating mode.
- the electromagnetic clutch may be turned off and the variable capacity compressor 100 may be stopped to suppress the deterioration of the solenoid 300B.
- the control valve 300 is duty-controlled so that the temperature Td of the discharged refrigerant becomes Tdl ⁇ Td ⁇ Td2. You may do it.
- Td reaches Td3 (Td3 >> Td2) that deviates from the region Tdl ⁇ Td ⁇ Td2 to the high pressure side
- the duty ratio is set to 0%
- the solenoid 300B is demagnetized, and the discharge capacity of the variable capacity compressor 100 is increased. It is also possible to secure the safety of the air conditioner 1 by arranging a protective device to minimize.
- variable capacity compressor 100 when the variable capacity compressor 100 is connected to the vehicle engine via an electromagnetic clutch, when Td reaches Td3 (Td3 >> Td2) that deviates from the region TdKTd and Td2 to the high pressure side in the auxiliary heating mode.
- Td3 Td3 >> Td2
- the safety of the air conditioner 1 may be secured by turning off the electromagnetic clutch and stopping the variable capacity compressor 100.
- the present invention is also applicable to the following air conditioners.
- An air conditioner incorporating a variable displacement compressor with a control valve that has a pressure-sensitive mechanism that operates according to the differential pressure between two locations on the low and high pressure sides.
- An air conditioner incorporating a variable capacity compressor driven by a motor.
- Air conditioners other than vehicle air conditioners are other than vehicle air conditioners.
- An air conditioner equipped with a temperature sensor that detects the refrigerant temperature on the high pressure side or the surface temperature of the evaporator 18 instead of the pressure sensor 124.
- FIG. 1 is a configuration diagram of an air conditioner according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a variable capacity compressor provided in an air conditioner according to an embodiment of the present invention.
- FIG. 3 is a discharge capacity control valve of a variable capacity compressor provided in an air conditioner according to an embodiment of the present invention.
- FIG. (A) is a whole sectional view
- (b) is a partially enlarged sectional view when the valve is closed
- (c) is a partially enlarged sectional view excluding the valve body.
- FIG. 5 is a diagram showing a current value controlled by a pulse width modulation method that flows through the electromagnetic coil of the control valve of FIG. 3.
- FIG. 6 is a view showing a control characteristic equation of the discharge capacity control valve of FIG.
- FIG. 7 is a diagram showing control characteristics of the discharge capacity control valve of FIG. 3.
- FIG. 8 is a diagram showing a control flow of the air conditioner according to the embodiment of the present invention.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Air-Conditioning For Vehicles (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800121112A CN101416003B (zh) | 2006-04-06 | 2007-04-02 | 空调装置 |
US12/296,089 US8117858B2 (en) | 2006-04-06 | 2007-04-02 | Air conditioner |
EP07740810A EP2003407A4 (en) | 2006-04-06 | 2007-04-02 | AIR CONDITIONING |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006105754A JP4799252B2 (ja) | 2006-04-06 | 2006-04-06 | 空調装置 |
JP2006-105754 | 2006-04-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007119641A1 true WO2007119641A1 (ja) | 2007-10-25 |
Family
ID=38609405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/057374 WO2007119641A1 (ja) | 2006-04-06 | 2007-04-02 | 空調装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8117858B2 (ja) |
EP (1) | EP2003407A4 (ja) |
JP (1) | JP4799252B2 (ja) |
KR (1) | KR101012529B1 (ja) |
CN (1) | CN101416003B (ja) |
WO (1) | WO2007119641A1 (ja) |
Cited By (1)
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JP2010038063A (ja) * | 2008-08-06 | 2010-02-18 | Sanden Corp | 可変容量圧縮機の制御システム |
Families Citing this family (22)
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JP2010038062A (ja) * | 2008-08-06 | 2010-02-18 | Sanden Corp | 可変容量圧縮機の制御システム |
JP5423150B2 (ja) * | 2009-05-28 | 2014-02-19 | アイシン精機株式会社 | 空気調和装置 |
JP2011246083A (ja) * | 2010-05-31 | 2011-12-08 | Suzuki Motor Corp | 車両用空調装置 |
JP5697022B2 (ja) * | 2010-12-14 | 2015-04-08 | サンデン株式会社 | 可変容量圧縮機 |
JP5482728B2 (ja) * | 2011-05-20 | 2014-05-07 | 株式会社デンソー | 冷凍サイクル装置 |
US20130133347A1 (en) * | 2011-11-24 | 2013-05-30 | General Electric Company | System and method for compression of fluids |
DE102012003567A1 (de) * | 2012-02-27 | 2013-08-29 | Gea Bock Gmbh | Kälteanlage |
FR2991401B1 (fr) * | 2012-06-01 | 2015-08-07 | Valeo Systemes Thermiques | Dispositif de securite pour compresseur d'un circuit de fluide refrigerant |
EP2703201A1 (en) | 2012-08-28 | 2014-03-05 | Tofas Turk Otomobil Fabrikasi Anonim Sirketi | A heating and cooling system |
JP6101892B2 (ja) * | 2013-04-24 | 2017-03-29 | 株式会社テージーケー | 可変容量圧縮機および流量センサの取付構造 |
US9358856B2 (en) * | 2013-10-03 | 2016-06-07 | Ford Global Technologies, Llc | System off configuration for climate control system |
US9869500B2 (en) * | 2013-11-22 | 2018-01-16 | Lennox Industries Inc. | Heat pump system having a pressure trip sensor recalculation algorithm controller |
JP6164135B2 (ja) * | 2014-03-27 | 2017-07-19 | 株式会社豊田自動織機 | 圧縮機 |
CN105299818B (zh) * | 2014-06-30 | 2018-03-13 | 广东美的集团芜湖制冷设备有限公司 | 空调器和空调器的控制方法 |
JP6090301B2 (ja) * | 2014-12-17 | 2017-03-08 | トヨタ自動車株式会社 | エンジン冷却システムおよびその運転方法 |
JP6500183B2 (ja) * | 2015-04-02 | 2019-04-17 | 株式会社テージーケー | 可変容量圧縮機用制御弁 |
EP3225939B1 (en) | 2016-03-31 | 2022-11-09 | Mitsubishi Electric Corporation | Refrigerant cycle with an ejector |
EP3382300B1 (en) | 2017-03-31 | 2019-11-13 | Mitsubishi Electric R&D Centre Europe B.V. | Cycle system for heating and/or cooling and heating and/or cooling operation method |
US10731903B2 (en) * | 2017-05-01 | 2020-08-04 | Temptronic Corporation | System and method for device under test cooling using digital scroll compressor |
CN107747789B (zh) * | 2017-08-30 | 2019-11-05 | 青岛海尔空调器有限总公司 | 空调及其过冷管组的故障检测和处理方法 |
CN108162712B (zh) * | 2017-11-15 | 2020-06-16 | 珠海格力电器股份有限公司 | 空调控制方法、装置及空调 |
JP6879387B2 (ja) * | 2017-12-25 | 2021-06-02 | 株式会社島津製作所 | 送液装置 |
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-
2007
- 2007-04-02 WO PCT/JP2007/057374 patent/WO2007119641A1/ja active Application Filing
- 2007-04-02 EP EP07740810A patent/EP2003407A4/en not_active Withdrawn
- 2007-04-02 CN CN2007800121112A patent/CN101416003B/zh not_active Expired - Fee Related
- 2007-04-02 US US12/296,089 patent/US8117858B2/en not_active Expired - Fee Related
- 2007-04-02 KR KR1020087023833A patent/KR101012529B1/ko not_active IP Right Cessation
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JP2000205667A (ja) | 1999-01-12 | 2000-07-28 | Toyota Autom Loom Works Ltd | 空調装置 |
JP2004010023A (ja) * | 2002-06-12 | 2004-01-15 | Sanden Corp | 可変容量圧縮機の制御装置 |
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Also Published As
Publication number | Publication date |
---|---|
EP2003407A9 (en) | 2009-05-06 |
KR20080104354A (ko) | 2008-12-02 |
US20090173094A1 (en) | 2009-07-09 |
KR101012529B1 (ko) | 2011-02-07 |
CN101416003A (zh) | 2009-04-22 |
EP2003407A4 (en) | 2009-03-04 |
CN101416003B (zh) | 2010-12-15 |
EP2003407A2 (en) | 2008-12-17 |
JP2007278593A (ja) | 2007-10-25 |
US8117858B2 (en) | 2012-02-21 |
JP4799252B2 (ja) | 2011-10-26 |
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