WO2012042692A1 - 冷凍サイクル装置 - Google Patents
冷凍サイクル装置 Download PDFInfo
- Publication number
- WO2012042692A1 WO2012042692A1 PCT/JP2011/001138 JP2011001138W WO2012042692A1 WO 2012042692 A1 WO2012042692 A1 WO 2012042692A1 JP 2011001138 W JP2011001138 W JP 2011001138W WO 2012042692 A1 WO2012042692 A1 WO 2012042692A1
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- WIPO (PCT)
- Prior art keywords
- heat
- heat exchanger
- outdoor
- heat storage
- compressor
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0294—Control issues related to the outdoor fan, e.g. controlling speed
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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
- F25B2400/05—Compression system with heat exchange between particular parts of the system
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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
- F25B2400/24—Storage receiver heat
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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
- F25B2700/2106—Temperatures of fresh outdoor air
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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
- F25B2700/2111—Temperatures of a heat storage receiver
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Definitions
- the present invention relates to a refrigeration cycle apparatus in which a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger are connected to each other through a refrigerant pipe, and in particular, a refrigeration capable of improving the reliability of the compressor during a defrosting operation.
- the present invention relates to a cycle device.
- Patent Document 1 a heat storage tank is provided in the compressor provided in the outdoor unit, and what is defrosted using the waste heat of the compressor stored in the heat storage tank during heating operation has been proposed (for example, Patent Document 1).
- FIG. 9 shows an example of a refrigeration cycle apparatus that employs such a defrosting method.
- the compressor 100, the four-way valve 102, the outdoor heat exchanger 104, the capillary tube 106, the indoor unit provided in the outdoor unit are shown. Is connected to the indoor heat exchanger 108 provided by the refrigerant pipe, the first bypass circuit 110 for bypassing the capillary tube 106, and the discharge side of the compressor 100 to the indoor heat exchanger 108 via the four-way valve 102.
- a second bypass circuit 112 is provided in which one end is connected to the connecting pipe and the other end is connected to the pipe extending from the capillary tube 106 to the outdoor heat exchanger 104.
- the first bypass circuit 110 is provided with a two-way valve 114, a check valve 116, and a heat storage heat exchanger 118, and the second bypass circuit 112 is provided with a two-way valve 120 and a check valve 122. Yes.
- a heat storage tank 124 is provided around the compressor 100, and the heat storage tank 124 is filled with a latent heat storage material 126 for exchanging heat with the heat storage heat exchanger 118.
- the two two-way valves 114 and 120 are controlled to open, a part of the refrigerant discharged from the compressor 100 flows to the second bypass circuit 112, and the remaining refrigerant is the four-way valve. 102 and the indoor heat exchanger 108.
- a small amount of refrigerant flows to the outdoor heat exchanger 104 through the capillary tube 106, while the remaining most of the refrigerant passes through the first bypass circuit.
- the heat storage heat exchanger 118 flows into the heat storage heat exchanger 118 through the two-way valve 114, takes heat from the heat storage material 126, passes through the check valve 116, and then merges with the refrigerant that has passed through the capillary tube 106 to the outdoor. It flows to the heat exchanger 104. Thereafter, the refrigerant merged with the refrigerant flowing through the second bypass circuit 112 at the inlet of the outdoor heat exchanger 104, defrosted using the heat of the refrigerant, and after passing through the four-way valve 102, Inhaled.
- the hot gas discharged from the compressor 100 during defrosting is guided to the outdoor heat exchanger 104 and the pressure of the refrigerant flowing into the outdoor heat exchanger 104 Therefore, the defrosting ability can be increased, and the defrosting can be completed in a very short time.
- outdoor heat exchange is performed between the refrigerant discharged from the compressor 100 and the refrigerant that has taken away the heat accumulated in the heat storage material 126 when passing through the heat storage heat exchanger 118.
- the defrosting operation of the outdoor heat exchanger 104 is performed by being supplied to the cooler 104. Therefore, in a case where sufficient heat is not accumulated in the heat storage material 126, there may be a case where the defrosting operation of the outdoor heat exchanger 104 cannot be performed.
- the compressor when the outdoor temperature is high, since the large heating capacity is not required, the compressor is often operated for a long time with a low capacity. In such a case, since the temperature of the compressor is low, the heat storage material 126 is sufficient. Often no heat is accumulated.
- the present invention has been made in view of such problems of the prior art, and performs reliable defrosting operation of the outdoor heat exchanger 104 under conditions where the temperature of the heat storage material is difficult to rise and the outdoor temperature is high.
- An object of the present invention is to provide a refrigeration cycle apparatus that can perform such a process.
- the present invention provides a compressor, an indoor heat exchanger connected to the compressor, an expansion valve connected to the indoor heat exchanger, and an outdoor heat connected to the expansion valve.
- An refrigeration cycle apparatus including an exchanger, an outdoor fan, and an outdoor temperature detection means, and an outdoor heat exchanger and a compressor connected via a four-way valve, arranged so as to surround the compressor, And a heat storage heat exchanger for exchanging heat between the heat stored in the heat storage material and the heat stored in the heat storage material, and during the defrosting operation, the refrigerant discharged from the compressor is used for outdoor heat exchange.
- the refrigerant that has been led to the heat storage heat exchanger via the indoor heat exchanger, passed through the outdoor heat exchanger, and the refrigerant that has exchanged heat with the heat storage material in the heat storage heat exchanger merge.
- the outdoor air detected by the outdoor temperature detection means and guided to the suction side of the compressor If is greater than a predetermined value, it is obtained so as to rotate the outdoor blower fan.
- heat in the outdoor air can be supplied to the outdoor heat exchanger under conditions where the temperature of the heat storage material is difficult to rise and the outdoor outdoor temperature is high. It can be performed.
- FIG. 1 is a diagram showing a configuration of an air conditioner including a refrigeration cycle apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic diagram illustrating the operation and refrigerant flow during normal heating of the air conditioner of FIG.
- FIG. 3 is a schematic diagram showing the operation of the air conditioner of FIG. 1 during defrosting / heating and the flow of refrigerant.
- FIG. 4 is a diagram showing the shape of the merged portion of the liquid-phase refrigerant and the gas-phase refrigerant in the refrigerant pipe of the air conditioner of FIG.
- FIG. 1 is a diagram showing a configuration of an air conditioner including a refrigeration cycle apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic diagram illustrating the operation and refrigerant flow during normal heating of the air conditioner of FIG.
- FIG. 3 is a schematic diagram showing the operation of the air conditioner of FIG. 1 during defrosting / heating and the flow of refrigerant.
- FIG. 5 is a diagram showing the shape of a merged portion of a liquid-phase refrigerant and a gas-phase refrigerant in a refrigerant pipe of an air conditioner equipped with a refrigeration cycle apparatus according to Embodiment 2 of the present invention.
- FIG. 6 is a diagram showing a configuration of an air conditioner including a refrigeration cycle apparatus according to Embodiment 3 of the present invention.
- FIG. 7 is a diagram showing the shape of the merged portion of the liquid-phase refrigerant and the gas-phase refrigerant in the refrigerant pipe of the air conditioner of FIG.
- FIG. 8 is a flowchart showing a control example of the outdoor fan in the defrosting operation of the present invention.
- FIG. 9 is a schematic diagram showing the configuration of a conventional refrigeration cycle apparatus.
- the first invention includes a compressor, an indoor heat exchanger connected to the compressor, an expansion valve connected to the indoor heat exchanger, an outdoor heat exchanger connected to the expansion valve, and an outdoor A refrigeration cycle apparatus comprising a blower fan and an outdoor temperature detecting means, wherein an outdoor heat exchanger and a compressor are connected via a four-way valve, arranged so as to surround the compressor, and generates heat generated by the compressor.
- It further has a heat storage material that stores heat and a heat storage heat exchanger that exchanges heat with the heat stored in the heat storage material, and during the defrosting operation, the refrigerant discharged from the compressor is led to the outdoor heat exchanger And the refrigerant that is guided to the heat storage heat exchanger through the indoor heat exchanger and passes through the outdoor heat exchanger, and the refrigerant that has exchanged heat with the heat storage material in the heat storage heat exchanger. And is introduced to the suction side of the compressor, and by the outdoor temperature detecting means. Outdoor air temperature detected is equal to or larger than a predetermined value, is obtained so as to rotate the outdoor blower fan.
- the heat storage material temperature detection means for detecting the temperature of the heat storage material is further included, and the heat storage material temperature detection means is configured such that the heat storage material temperature during heat storage is equal to or lower than a predetermined temperature.
- the outdoor fan is rotated during the defrosting operation.
- FIG. 1 shows a configuration of an air conditioner including a refrigeration cycle apparatus according to Embodiment 1 of the present invention.
- the air conditioner includes an outdoor unit 2 and an indoor unit 4 that are connected to each other by refrigerant piping. It is configured.
- a compressor 6, a four-way valve 8, a strainer 10, an expansion valve 12, and an outdoor heat exchanger 14 are provided inside the outdoor unit 2.
- a heat exchanger 16 is provided, and these are connected to each other via a refrigerant pipe to constitute a refrigeration cycle.
- the temperature of an outdoor air fan 48 for exchanging heat between the outdoor heat exchanger 14 and outdoor air, an outdoor temperature sensor 44 for detecting the outdoor air temperature, and the temperature of a heat storage material 36 to be described later are stored.
- a heat storage material temperature sensor 46 to be detected is also incorporated.
- the compressor 6 and the indoor heat exchanger 16 are connected via a first pipe 18 provided with a four-way valve 8, and the indoor heat exchanger 16 and the expansion valve 12 are provided with a strainer 10.
- the second pipe 20 is connected.
- the expansion valve 12 and the outdoor heat exchanger 14 are connected via a third pipe 22, and the outdoor heat exchanger 14 and the compressor 6 are connected via a fourth pipe 24.
- a four-way valve 8 is disposed in the middle of the fourth pipe 24, and an accumulator 26 for separating the liquid-phase refrigerant and the gas-phase refrigerant is provided in the fourth pipe 24 on the refrigerant suction side of the compressor 6. ing.
- the compressor 6 and the third pipe 22 are connected via a fifth pipe 28, and the first solenoid valve 30 is provided in the fifth pipe 28.
- a heat storage tank 32 is provided around the compressor 6, and a heat storage heat exchanger 34 is provided inside the heat storage tank 32, and a heat storage material for exchanging heat with the heat storage heat exchanger 34 (for example, An ethylene glycol aqueous solution) 36 is filled, and the heat storage tank 32, the heat storage heat exchanger 34, and the heat storage material 36 constitute a heat storage device.
- a heat storage material for exchanging heat with the heat storage heat exchanger 34 for example, An ethylene glycol aqueous solution
- the second pipe 20 and the heat storage heat exchanger 34 are connected via a sixth pipe 38, the heat storage heat exchanger 34 and the fourth pipe 24 are connected via a seventh pipe 40, and the sixth pipe 38. Is provided with a second electromagnetic valve 42.
- an air blower fan (not shown), upper and lower blades (not shown), and left and right blades (not shown) are provided inside the indoor unit 4, and indoor heat exchange is performed.
- the unit 16 exchanges heat between the indoor air sucked into the interior of the indoor unit 4 by the blower fan and the refrigerant flowing through the interior of the indoor heat exchanger 16, and blows out the air warmed by heat exchange into the room during heating.
- air cooled by heat exchange is blown into the room during cooling.
- the upper and lower blades change the direction of air blown from the indoor unit 4 up and down as necessary, and the left and right blades change the direction of air blown from the indoor unit 4 to right and left as needed.
- the compressor 6, the blower fan, the upper and lower blades, the left and right blades, the four-way valve 8, the expansion valve 12, the electromagnetic valves 30 and 42, and the sensor are electrically connected to a control device (not shown, for example, a microcomputer) for control. Controlled by the device.
- the refrigerant discharged from the discharge port of the compressor 6 passes from the four-way valve 8 to the indoor heat exchanger 16 through the first pipe 18.
- the refrigerant condensed by exchanging heat with the indoor air in the indoor heat exchanger 16 passes through the second pipe 20 through the indoor heat exchanger 16, expands through the strainer 10 that prevents foreign matter from entering the expansion valve 12.
- To valve 12. The refrigerant decompressed by the expansion valve 12 reaches the outdoor heat exchanger 14 through the third pipe 22, and the refrigerant evaporated by exchanging heat with the outdoor air in the outdoor heat exchanger 14 is the fourth pipe 24 and the four-way valve 8. And returns to the suction port of the compressor 6 through the accumulator 26.
- the fifth pipe 28 branched from the compressor 6 discharge port of the first pipe 18 and the four-way valve 8 is connected to the expansion valve 12 of the third pipe 22 and the outdoor heat exchanger 14 via the first electromagnetic valve 30. I am joining in between.
- the heat storage tank 32 in which the heat storage material 36 and the heat storage heat exchanger 34 are housed is disposed so as to be in contact with and surround the compressor 6, and the heat generated in the compressor 6 is accumulated in the heat storage material 36, and the second The sixth pipe 38 branched from the pipe 20 between the indoor heat exchanger 16 and the strainer 10 reaches the inlet of the heat storage heat exchanger 34 via the second electromagnetic valve 42 and exits from the outlet of the heat storage heat exchanger 34.
- the seventh pipe 40 joins between the four-way valve 8 and the accumulator 26 in the fourth pipe 24.
- the strainer 10 is disposed between the diversion portion of the second pipe 20 and the sixth pipe 38 and the expansion valve 12, but the indoor heat exchanger 16 and the sixth pipe 38 in the second pipe 20 Even if it arrange
- FIG. 2 schematically showing the operation during normal heating and the flow of the refrigerant of the air conditioner shown in FIG.
- the first electromagnetic valve 30 and the second electromagnetic valve 42 are controlled to be closed, and the refrigerant discharged from the discharge port of the compressor 6 as described above passes through the first pipe 18 and the four-way valve 8.
- the indoor heat exchanger 16 The refrigerant condensed by exchanging heat with the indoor air in the indoor heat exchanger 16 exits the indoor heat exchanger 16, passes through the second pipe 20, reaches the expansion valve 12, and the refrigerant decompressed by the expansion valve 12 is the third refrigerant. It reaches the outdoor heat exchanger 14 through the pipe 22.
- the refrigerant evaporated by exchanging heat with outdoor air in the outdoor heat exchanger 14 returns from the four-way valve 8 to the suction port of the compressor 6 through the fourth pipe 24.
- the heat generated in the compressor 6 is accumulated in the heat storage material 36 housed in the heat storage tank 32 from the outer wall of the compressor 6 through the outer wall of the heat storage tank 32.
- FIG. 3 schematically showing the operation of the air conditioner shown in FIG. 1 during defrosting / heating and the flow of refrigerant.
- the solid line arrows indicate the flow of the refrigerant used for heating
- the broken line arrows indicate the flow of the refrigerant used for defrosting.
- the air conditioner according to the present invention is provided with a pipe temperature sensor 45 that detects the pipe temperature of the outdoor heat exchanger 14, and the evaporation temperature is lower than that during non-frosting. When this is detected by the pipe temperature sensor 45, an instruction from the normal heating operation to the defrosting / heating operation is output from the control device.
- the first electromagnetic valve 30 and the second electromagnetic valve 42 are controlled to open, and in addition to the refrigerant flow during the normal heating operation described above, the first solenoid valve 30 and the second electromagnetic valve 42 are discharged from the discharge port of the compressor 6. After a part of the vapor-phase refrigerant passes through the fifth pipe 28 and the first electromagnetic valve 30 and merges with the refrigerant passing through the third pipe 22, the outdoor heat exchanger 14 is heated, condensed, and converted into a liquid phase. Through the fourth pipe 24, the four-way valve 8 and the accumulator 26 are returned to the suction port of the compressor 6.
- a part of the liquid-phase refrigerant that is divided between the indoor heat exchanger 16 and the strainer 10 in the second pipe 20 passes through the sixth pipe 38 and the second electromagnetic valve 42, and then is stored in the heat storage material 36 in the heat storage heat exchanger 34. From the accumulator 26 and returns to the suction port of the compressor 6 through the seventh pipe 40 and the refrigerant that passes through the fourth pipe 24.
- the refrigerant returning to the accumulator 26 includes the liquid phase refrigerant returning from the outdoor heat exchanger 14. By mixing this with the high-temperature gas phase refrigerant returning from the heat storage heat exchanger 34, The evaporation of the phase refrigerant is promoted, and the liquid phase refrigerant does not return to the compressor 6 through the accumulator 26, so that the reliability of the compressor 6 can be improved.
- the temperature of the outdoor heat exchanger 14 that has become below freezing due to the attachment of frost at the start of defrosting and heating is heated by the gas-phase refrigerant discharged from the discharge port of the compressor 6, and the frost is melted near zero degrees.
- the temperature of the outdoor heat exchanger 14 begins to rise again.
- the pipe temperature sensor 45 it is determined that the defrosting is completed, and an instruction from the defrosting / heating operation to the normal heating operation is output from the control device.
- the seventh pipe 40 is joined to the side of the fourth pipe 24 at an angle of about 90 degrees.
- the resistance of the inflow portion from the seventh pipe 40 to the fourth pipe 24 increases, and heat is stored from the sixth pipe 38.
- the pressure loss of the entire bypass piping system that reaches the seventh piping 40 through the heat exchanger 34 may increase, and the circulation amount of the bypass piping system may decrease.
- the heat exchange capacity of the heat storage heat exchanger 34 is very large.
- the circulation amount of the heat storage heat exchanger 34 is small, the degree of superheat increases in the latter half of the heat storage heat exchanger 34. Since heat exchange cannot be performed, the heat exchange amount of the heat storage heat exchanger 34 may reach its peak, and the defrosting ability may not be sufficiently exhibited.
- FIG. 5 shows another shape of the joining portion (A portion in FIG. 3) of the seventh pipe 40 and the fourth pipe 24 for improving this point.
- the seventh pipe 40 is joined to the side of the fourth pipe 24 at an angle of less than 90 degrees from the upstream side of the fourth pipe 24.
- this shape has a smaller collision loss when the refrigerant flowing through the seventh pipe 40 collides with the refrigerant in the fourth pipe 24, and the seventh pipe 40 to the fourth pipe 24. Therefore, the pressure loss of the entire bypass piping system from the sixth piping 38 through the heat storage heat exchanger 34 to the seventh piping 40 is reduced, and the circulation amount of the bypass piping system is increased. .
- FIG. 6 shows a refrigeration cycle having yet another shape of the joining portion of the seventh pipe 40 and the fourth pipe 24.
- FIG. 7 shows a joining portion of the seventh pipe 40 and the fourth pipe 24 (B in FIG. 6). Part).
- the joining portion of the seventh pipe 40 and the fourth pipe 24 shown in FIG. 3 is between the four-way valve 8 and the accumulator 26, whereas in the present embodiment, as shown in FIG. A joining portion of the pipe 40 and the fourth pipe 24 is located between the accumulator 26 and the compressor 6.
- the refrigerant that has evaporated and vaporized by absorbing heat from the heat storage material 36 in the heat storage heat exchanger 34 passes through the fourth pipe 24 between the four-way valve 8 and the accumulator 26 through the seventh pipe 40.
- the refrigerant merges with the refrigerant and returns from the accumulator 26 to the suction port of the compressor 6.
- the accumulator 26 whose temperature has decreased before the defrosting has a large heat capacity, and the high-temperature gas-phase refrigerant returned from the heat storage heat exchanger 34 during the defrosting is cooled by the accumulator 26, so Heat cannot be used sufficiently and the defrosting time may be extended.
- the refrigerant from the outdoor heat exchanger 14 is returned to the compressor 6 without going through the accumulator 26, so that the heat of the high-temperature gas-phase refrigerant can be used for defrosting without waste. This can shorten the defrosting time.
- This configuration is not limited to the present embodiment, but can be applied to the above-described first or second embodiment.
- the joining part of the fourth pipe 24 and the seventh pipe 40 is formed in a substantially U shape, and the seventh pipe 40 is a part of the joining part with the fourth pipe 24. It is connected to the fourth pipe 24 so as to be substantially parallel to the fourth pipe 24 on the upstream side. That is, the refrigerant passing through the fourth pipe 24 and the refrigerant passing through the seventh pipe 40 are merged as a substantially parallel flow, thereby reducing the collision loss between them as much as possible.
- the capacity of the compressor 6 is controlled to be low. The temperature hardly rises, and as a result, the temperature of the heat storage material 36 often does not rise.
- frost grows on the outdoor heat exchanger 14 if the temperature of the outdoor heat exchanger 14 is below the freezing point and below the dew point temperature of the outdoor air.
- frost growth is often slow, but in order to detect that defrosting operation is necessary, a certain amount of frost is attached and the outdoor heat exchanger 14 is clogged with frost. Since it is necessary for the temperature of the heat exchanger 14 to decrease, the amount of frost at the time of entering the defrosting operation is not different from the usual, and the amount of heat storage is small, so the defrosting time becomes longer or frost remains. There was a fear.
- Such a tendency is a characteristic peculiar to the configuration of the present invention in which the heat storage amount depends on the operation state of the compressor 6 before the defrosting operation.
- the temperature Ts of the heat storage material 36 is detected by the heat storage material temperature sensor 46 before the defrosting operation.
- the first electromagnetic valve 30 and the second electromagnetic valve 42 are opened as described above.
- the heat storage material temperature Ts detected before the start of defrosting is compared with a predetermined determination temperature.
- This determination temperature is determined from the specific heat of the heat storage material 36 and the outdoor heat exchanger 14, but in the case of this embodiment, it is transmitted from the temperature when the compressor 6 is operated at a low capacity (for example, 40 ° C.). For example, 30 ° C. is determined in consideration of heat loss.
- the outdoor temperature sensor 44 detects the outdoor air temperature To and compares it with a predetermined determination temperature.
- the determination temperature is, for example, 1 ° C. in consideration of the fact that the amount of heat of outdoor air can contribute to defrosting and the design error only when the outdoor air temperature is 0 ° C. or higher. I have decided.
- the defrosting operation is performed with the setting of operating the outdoor fan 48 as shown in the figure.
- the defrosting operation is performed with the setting to stop the outdoor fan 48 as shown in the figure.
- the temperature is determined at the start of the defrosting operation, and the operation state of the outdoor fan 48 during the defrosting operation is determined, but the outdoor air temperature is determined during the defrosting operation, Needless to say, the same effect can be obtained even when the operation of the outdoor fan is started or stopped.
- the refrigeration cycle apparatus can improve the defrosting capability at high outdoor temperature in an air heat source type heat pump that uses the exhaust heat of the compressor. Therefore, the air conditioner, the water heater, and the heat pump type Useful for washing machines.
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- General Engineering & Computer Science (AREA)
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Abstract
Description
図1は、本発明の実施の形態1に係る冷凍サイクル装置を備えた空気調和機の構成を示しており、空気調和機は、冷媒配管で互いに接続された室外機2と室内機4とで構成されている。
図5は、この点を改善するための第7配管40と第4配管24の合流部分(図3のA部)の別の形状を示している。
図6は、第7配管40と第4配管24の合流部分のさらに別の形状を持つ冷凍サイクルを示しており、図7は第7配管40と第4配管24の合流部分(図6のB部)を示している。
次に、制御動作を示す図8を参照しながら、室外送風ファン48等の制御について説明する。以下に記載する室外送風ファンの制御は、上述した各実施の形態の冷凍サイクル装置に適用することができる。
10 ストレーナ、 12 膨張弁、 14 室外熱交換器、
16 室内熱交換器、 18 第1配管、 20 第2配管、
22 第3配管、 24 第4配管、 26 アキュームレータ、
28 第5配管、 30 第1電磁弁、 32 蓄熱槽、
34 蓄熱熱交換器、 36 蓄熱材、 38 第6配管、
40 第7配管、 42 第2電磁弁、 44 室外温度センサ、
45 配管温度センサ、 46 蓄熱材温度センサ、
48 室外送風ファン。
Claims (2)
- 圧縮機と、該圧縮機に接続された室内熱交換器と、該室内熱交換器と接続された膨張弁と、該膨張弁と接続された室外熱交換器と、室外送風ファンと室外温度検知手段を備え、前記室外熱交換器と圧縮機とが四方弁を介して接続された冷凍サイクル装置であって、
前記圧縮機を囲むように配置され、前記圧縮機で発生した熱を蓄熱する蓄熱材と、該蓄熱材に蓄熱された熱とで熱交換を行う蓄熱熱交換器とをさらに有し、
除霜運転時には、前記圧縮機の吐出冷媒が前記室外熱交換器に導かれるとともに、前記室内熱交換器を介して前記蓄熱熱交換器に導かれ、前記室外熱交換器を通った後の冷媒と、前記蓄熱熱交換器で前記蓄熱材と熱交換された冷媒と、が合流して前記圧縮機の吸入側に導かれるように構成し、かつ、前記室外温度検知手段によって検知した室外側気温が所定の値以上の場合は、室外送風ファンを回転させることを特徴とする冷凍サイクル装置。 - 前記蓄熱材の温度を検知する蓄熱材温度検知手段をさらに有し、該蓄熱材温度検知手段が、蓄熱時の蓄熱材温度が所定の温度以下であることを検知した場合は、除霜運転時に前記室外送風ファンを回転させることを特徴とする請求項1に記載の冷凍サイクル装置。
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KR1020137011042A KR20130114154A (ko) | 2010-10-01 | 2011-02-28 | 냉동 사이클 장치 |
EP11828262.3A EP2623897B1 (en) | 2010-10-01 | 2011-02-28 | Refrigeration cycle equipment |
CN2011800476830A CN103154644A (zh) | 2010-10-01 | 2011-02-28 | 制冷循环装置 |
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RU2511804C2 (ru) * | 2012-06-01 | 2014-04-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Южно-Российский государственный университет экономики и сервиса" (ФГБОУ ВПО "ЮРГУЭС") | Способ охлаждения герметичного компресорно-конденсаторного агрегата компрессионного холодильного прибора |
CN105180274A (zh) * | 2015-08-26 | 2015-12-23 | 珠海格力电器股份有限公司 | 一种空调系统及利用该系统的调节方法 |
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WO2015162790A1 (ja) * | 2014-04-25 | 2015-10-29 | 三菱電機株式会社 | 冷凍サイクル装置、及びその冷凍サイクル装置を備えた空気調和装置 |
EP3499149A4 (en) * | 2016-08-12 | 2019-08-28 | Sharp Kabushiki Kaisha | AIR CONDITIONER |
CN106765779B (zh) * | 2017-01-10 | 2019-11-29 | 美的集团武汉制冷设备有限公司 | 一种空调器以及空调器的化霜控制方法 |
JP6669187B2 (ja) * | 2018-03-30 | 2020-03-18 | ダイキン工業株式会社 | 冷凍サイクル装置 |
CN111365819B (zh) * | 2020-03-26 | 2021-11-16 | 宁波奥克斯电气股份有限公司 | 一种调节空调高温制冷量的控制方法、装置及空调器 |
JP2022103989A (ja) * | 2020-12-28 | 2022-07-08 | アクア株式会社 | 冷蔵庫 |
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CN105180274A (zh) * | 2015-08-26 | 2015-12-23 | 珠海格力电器股份有限公司 | 一种空调系统及利用该系统的调节方法 |
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KR20130114154A (ko) | 2013-10-16 |
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