WO2012046528A1 - 空気調和機 - Google Patents
空気調和機 Download PDFInfo
- Publication number
- WO2012046528A1 WO2012046528A1 PCT/JP2011/070014 JP2011070014W WO2012046528A1 WO 2012046528 A1 WO2012046528 A1 WO 2012046528A1 JP 2011070014 W JP2011070014 W JP 2011070014W WO 2012046528 A1 WO2012046528 A1 WO 2012046528A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat exchanger
- outdoor
- indoor
- fan
- defrosting
- Prior art date
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Classifications
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/004—Control mechanisms
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
-
- 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
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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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
-
- 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
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- 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
- F25B2313/0293—Control issues related to the indoor fan, e.g. controlling speed
-
- 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
-
- 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
- F25B2313/031—Sensor arrangements
- F25B2313/0314—Temperature sensors near the indoor heat exchanger
-
- 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
- F25B2313/031—Sensor arrangements
- F25B2313/0315—Temperature sensors near the outdoor heat exchanger
-
- 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 that performs a heating operation and a defrosting operation.
- Patent Document 1 A conventional air conditioner is disclosed in Patent Document 1.
- This air conditioner includes an indoor unit arranged indoors and an outdoor unit arranged outdoors.
- the outdoor unit is provided with a compressor, an outdoor heat exchanger, and an outdoor fan
- the indoor unit is provided with an indoor heat exchanger and an indoor fan.
- the compressor operates the refrigeration cycle by circulating the refrigerant.
- each of the indoor heat exchanger and the outdoor heat exchanger is connected to the refrigerant discharge side of the compressor by a refrigerant pipe via a four-way valve.
- the other ends of the indoor heat exchanger and the outdoor heat exchanger are connected by a refrigerant pipe via an expansion valve.
- the outdoor fan is disposed opposite to the outdoor heat exchanger, and promotes heat exchange between the outdoor heat exchanger and outdoor air.
- the indoor fan takes indoor air into the indoor unit and sends out the air heat-exchanged with the indoor heat exchanger into the room.
- the refrigerant discharged from the compressor by switching the four-way valve flows through the indoor heat exchanger, the expansion valve, and the outdoor heat exchanger and returns to the compressor.
- an indoor heat exchanger becomes a high temperature part of a refrigerating cycle
- an outdoor heat exchanger becomes a low temperature part of a refrigerating cycle.
- the indoor air is heated by the heat exchange with the indoor heat exchanger, sent out indoors, and the room is heated.
- the indoor heat exchanger is cooled by exchanging heat with indoor air
- the outdoor heat exchanger is heated by exchanging heat with outdoor air by driving the outdoor fan.
- the refrigerant discharged from the compressor by switching the four-way valve flows in the opposite direction to that during heating operation. That is, the refrigerant flows through the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger and returns to the compressor.
- an outdoor heat exchanger becomes a high temperature part of a refrigerating cycle
- an indoor heat exchanger becomes a low temperature part of a refrigerating cycle.
- the indoor air is cooled by heat exchange with the indoor heat exchanger, sent to the room, and the room is cooled.
- the indoor heat exchanger is heated by exchanging heat with indoor air
- the outdoor heat exchanger is cooled by exchanging heat with outdoor air by driving the outdoor fan.
- defrosting operation is performed when the outdoor heat exchanger is frosted during heating operation.
- the indoor fan and the outdoor fan are stopped, and the refrigerant flows in the same direction as during the cooling operation by switching the four-way valve.
- This invention aims at providing the air conditioner which can reduce a defrosting defect and can improve usability and reliability.
- the present invention provides a compressor that operates a refrigeration cycle, an outdoor heat exchanger that is arranged outdoors, an indoor heat exchanger that is arranged indoors, and the outdoor heat exchange of the outdoor air. And an outdoor fan for supplying indoor air to the indoor heat exchanger.
- the indoor heat exchanger and the outdoor heat are driven by the compressor by driving the indoor fan and the outdoor fan.
- the refrigerant is circulated through the exchanger in one direction for heating operation, and when the outdoor heat exchanger is frosted, the refrigerant is circulated in the opposite direction to that during the heating operation to stop the indoor fan and the outdoor fan.
- the indoor fan and the outdoor fan are driven during the heating operation, and the refrigerant discharged from the compressor flows in the order of the indoor heat exchanger and the outdoor heat exchanger and returns to the compressor.
- an indoor heat exchanger becomes a high temperature part of a refrigerating cycle
- an outdoor heat exchanger becomes a low temperature part of a refrigerating cycle.
- the indoor air is heated by the heat exchange with the indoor heat exchanger, sent out indoors, and the room is heated.
- Defrosting operation is performed when the outdoor heat exchanger is frosted.
- the indoor fan and the outdoor fan are stopped, and the refrigerant discharged from the compressor flows in the order of the outdoor heat exchanger and the indoor heat exchanger and returns to the compressor.
- the outdoor heat exchanger becomes the high temperature part of the refrigeration cycle
- the indoor heat exchanger becomes the low temperature part of the refrigeration cycle
- the outdoor heat exchanger is heated.
- the defrosting operation is terminated and the operation is switched to the heating operation.
- Defrosting operation is performed when the outdoor heat exchanger is not heated sufficiently and the defrosting failure occurs because the defrosting operation is performed for a predetermined period.
- the outdoor fan is driven to stop the indoor fan, and the refrigerant discharged from the compressor flows in the order of the indoor heat exchanger and the outdoor heat exchanger in the same manner as in the heating operation, and returns to the compressor. .
- circulates a refrigerating cycle rises.
- the defrosting operation is resumed, and the refrigerant whose temperature has been raised in the defrosting preparation operation flows through the refrigeration cycle, and the outdoor heat exchanger is defrosted.
- the present invention is characterized in that, in the air conditioner having the above-described configuration, the heating operation is performed for a predetermined period before the defrost preparation operation. According to this configuration, when the defrosting failure occurs during the defrosting operation, the defrosting preparation operation is performed after the heating operation is performed for a predetermined period. Thereby, the indoor temperature fall can be suppressed.
- the temperature of the indoor heat exchanger rises above a predetermined temperature when a predetermined time has elapsed after the start of the defrost preparation operation or during the defrost preparation operation. In this case, the defrosting operation is restarted.
- the present invention provides a case where the temperature of the outdoor heat exchanger does not rise above a predetermined temperature even after a predetermined time has elapsed since the start of the defrosting operation or during the defrosting operation Further, when the discharge temperature of the refrigerant of the compressor is lower than a predetermined temperature, it is judged that the defrosting is defective.
- the defrosting operation is resumed after performing the defrosting preparation operation in which the refrigerant is circulated in the same direction as the heating operation and the outdoor fan is driven to stop the indoor fan when the defrosting is defective.
- the refrigerant that has been heated in the defrost preparation operation is circulated to resume the defrost operation.
- circuit diagram which shows the refrigerating cycle of the air conditioner of embodiment of this invention
- flowchart which shows the operation
- FIG. 1 is a circuit diagram showing a refrigeration cycle of an air conditioner according to an embodiment.
- the air conditioner 1 has an indoor unit 10 arranged indoors and an outdoor unit 20 arranged outdoor.
- a compressor 21 that operates a refrigeration cycle by circulating a refrigerant in the refrigerant pipe 2 is disposed in the outdoor unit 20.
- a four-way valve 22 connected to the compressor 21, an outdoor heat exchanger 23, an expansion valve 24, and an indoor fan 25 are provided in the outdoor unit 20.
- An indoor heat exchanger 13 and an indoor fan 15 are provided in the indoor unit 10.
- One end of the outdoor heat exchanger 23 and the indoor heat exchanger 13 is connected to the compressor 21 via the four-way valve 22 by the refrigerant pipe 2.
- the other ends of the outdoor heat exchanger 23 and the indoor heat exchanger 13 are connected by the refrigerant pipe 2 via the expansion valve 24.
- the outdoor fan 25 is disposed opposite to the outdoor heat exchanger 23. Outdoor air is supplied to the outdoor heat exchanger 23 by driving the outdoor fan 25, and heat exchange between the outdoor heat exchanger 23 and the outdoor air is promoted. The air that has exchanged heat with the outdoor heat exchanger 23 is exhausted to the outside through an exhaust port (not shown) that faces the outdoor fan 25 and opens to the outdoor unit 20.
- the indoor fan 15 and the indoor heat exchanger 13 are arranged in a ventilation passage (not shown) provided in the indoor unit 10. Indoor air flows into the ventilation passage by driving the indoor fan 15 and is supplied to the indoor heat exchanger 13, and the air flowing through the ventilation passage and the indoor heat exchanger 13 are heat-exchanged. The air that has exchanged heat with the indoor heat exchanger 13 is sent out indoors through an outlet (not shown) that opens to the indoor unit 10.
- the outdoor heat exchanger 23 is attached with an outdoor heat exchanger temperature sensor 26 that detects the temperature of the outdoor heat exchanger 23.
- the refrigerant pipe 2 on the discharge side of the compressor 21 is provided with a discharge temperature sensor 27 that detects the refrigerant discharge temperature.
- An indoor heat exchanger temperature sensor 16 that detects the temperature of the indoor heat exchanger 13 is attached to the indoor heat exchanger 13.
- the indoor fan 15 and the outdoor fan 25 are driven, and the four-way valve 22 is switched as indicated by a solid line in the figure.
- the refrigerant flows in the direction indicated by the arrow A by driving the compressor 21, and the high-temperature and high-pressure refrigerant compressed by the compressor 21 is condensed while releasing heat in the indoor heat exchanger 13.
- the high-temperature refrigerant is expanded by the expansion valve 24 to become low-temperature and low-pressure, and is sent to the outdoor heat exchanger 23.
- the refrigerant flowing into the outdoor heat exchanger 23 evaporates while absorbing heat to become a low-temperature gas refrigerant, and is sent to the compressor 21. Thereby, the refrigerant circulates and the refrigeration cycle is operated.
- the air heat-exchanged with the indoor heat exchanger 13 which is a high temperature part of the refrigeration cycle is sent out indoors by the indoor fan 15 and the room is heated.
- the air exchanged with the outdoor heat exchanger 23 that is a low temperature part of the refrigeration cycle is exhausted to the outside by the indoor fan 25.
- the indoor fan 15 and the outdoor fan 25 are driven, and the four-way valve 4 is switched as indicated by a broken line in the figure.
- the refrigerant flows in the direction opposite to the arrow A by driving the compressor 21, the indoor heat exchanger 13 becomes the low temperature part of the refrigeration cycle, and the outdoor heat exchanger 23 becomes the high temperature part of the refrigeration cycle.
- the air heat-exchanged with the indoor heat exchanger 13 is sent out indoors by the indoor fan 15, and the room is cooled.
- the air exchanged with the outdoor heat exchanger 23 that is a high temperature part of the refrigeration cycle is exhausted to the outside by the indoor fan 25.
- FIG. 2 is a flowchart showing the detailed operation during the heating operation of the air conditioner 1.
- the indoor fan 15, the outdoor fan 25, and the compressor 21 are driven in step # 11 to perform the heating operation.
- circulates to the arrow A direction.
- step # 12 it is determined whether or not the outdoor heat exchanger 23 has become lower than a predetermined temperature due to frost formation by the detection of the outdoor heat exchanger temperature sensor 26.
- step # 13 If the outdoor heat exchanger 23 is not lower than the predetermined temperature, the process returns to step # 11, and steps # 11 and # 12 are repeated. When the outdoor heat exchanger 23 becomes cooler than the predetermined temperature, the defrosting operation is performed at step # 13.
- the indoor fan 15 and the outdoor fan 25 are stopped, and the four-way valve 22 is switched as shown by the broken line in FIG.
- circulates in the reverse direction to the arrow A direction, and the outdoor heat exchanger 23 becomes a high temperature part of a refrigerating cycle, and is heated up.
- heat exchange between the outdoor heat exchanger 23 and the outdoor air is suppressed by stopping the outdoor fan 25, and the outdoor heat exchanger 23 can be efficiently heated.
- the stop of the indoor fan 15 can prevent the low temperature air from being sent into the room.
- Step # 14 it is determined whether or not the outdoor heat exchanger 23 has been heated to a temperature higher than a predetermined temperature by the detection of the outdoor heat exchanger temperature sensor 26. If the outdoor heat exchanger 23 has not been heated above the predetermined temperature, the process proceeds to step # 15. In step # 15, it is determined whether or not a predetermined time has elapsed since the defrosting operation was started. When a predetermined time has elapsed after the start of the defrosting operation, it is determined that the defrosting is defective and the process proceeds to step # 17. If the predetermined time has not elapsed since the start of the defrosting operation, the process proceeds to step # 16.
- step # 16 it is determined whether or not the refrigerant discharge temperature has fallen below a predetermined temperature (20 ° C. in the present embodiment) by detection of the discharge temperature sensor 27. If the refrigerant discharge temperature is lower than the predetermined temperature, it is determined that the defrosting is defective and the process proceeds to step # 17. If the refrigerant discharge temperature is not lower than the predetermined temperature, the process returns to step # 14, and steps # 14 to # 16 are repeated. If the outdoor heat exchanger 23 is heated above the predetermined temperature in step # 14, it is determined that the defrosting is completed, and the process returns to step # 11 and steps # 11 to # 14 are repeated.
- step # 18 the process waits until the heating operation started in step # 17 is performed for a predetermined time (6 minutes in the present embodiment).
- the outdoor heat exchanger 23 is suppressed from rising in temperature by outdoor low-temperature air, and the temperature of the refrigerant flowing through the refrigeration cycle is lowered. For this reason, the temperature of the refrigerant flowing through the refrigeration cycle can be raised by heating operation.
- the indoor temperature drop can be suppressed by performing the heating operation for a predetermined time after the defrosting operation.
- step # 19 When the heating operation is performed for a predetermined time, the process proceeds to step # 19, and the defrost preparation operation is performed.
- the indoor fan 13 In the defrost preparation operation, the indoor fan 13 is stopped from the heating operation state. That is, the four-way valve 22 is switched as indicated by the solid line in FIG. 1, and the compressor 21 and the outdoor fan 25 are driven to stop the indoor fan 15. Thereby, a refrigerant
- heat exchange between the indoor heat exchanger 13 in the high temperature part of the refrigeration cycle and the indoor air can be suppressed, and the temperature of the refrigerant can be raised compared to that during the heating operation.
- step # 20 it is determined whether or not a predetermined time (3 minutes in the present embodiment) has elapsed since the start of the defrost preparation operation. If the predetermined time has not elapsed since the start of the defrost preparation operation, the process proceeds to step # 21.
- step # 21 it is determined whether or not the indoor heat exchanger 13 has been heated above a predetermined temperature by the detection of the indoor heat exchanger temperature sensor 16 (56 ° C. or higher in this embodiment). If the indoor heat exchanger 13 has not been heated above the predetermined temperature, steps # 20 and # 21 are repeated.
- step # 20 If a predetermined time has elapsed since the start of the defrost preparation operation in step # 20, or if the indoor heat exchanger 13 has been heated to a temperature higher than the predetermined temperature in step # 21, the process returns to step # 13.
- the defrosting operation is resumed. Thereby, the refrigerant
- the pressure when R410A is used as the refrigerant corresponds to 3.5 MPa-abs. For this reason, even if the time lag until switching to the defrosting operation after detecting the temperature rise of the indoor heat exchanger 13 and the temperature measurement error of the indoor heat exchanger temperature sensor 16 are taken into consideration, the pressure is safe within the specification range. .
- the discharge temperature of the compressor 21 is used as a reference for determining that the temperature of the indoor heat exchanger 13 has been raised.
- the pressure detected by the indoor heat exchanger temperature sensor 16 is used.
- the defrosting operation is resumed by circulating the refrigerant heated in the defrosting preparation operation.
- the defrosting failure at the time of restarting the defrosting operation is reduced, the room can be heated to the heating operation at an early stage, and the failure of the outdoor unit 20 due to the growth of frost can be prevented. Therefore, the usability and reliability of the air conditioner 1 can be improved.
- step # 17 since the heating operation is performed for a predetermined period in step # 17 before the defrost preparation operation, the temperature drop in the room can be suppressed.
- steps # 17 and # 18 may be omitted, and the defrost preparation operation may be performed immediately when the defrost is poor. Thereby, the temperature of a refrigerant
- coolant can be raised more rapidly and a defrost operation can be restarted rapidly.
- step # 20 when the predetermined time has elapsed since the start of the defrost preparation operation (step # 20), the process proceeds to step # 13. Therefore, the defrost preparation operation is resumed until the refrigerant is sufficiently heated. Can be made.
- step # 21 when the temperature of the indoor heat exchanger 13 rises above a predetermined temperature during the defrost preparation operation (step # 21), the process moves to step # 13, so that the defrost operation can be restarted quickly.
- step # 15 when the temperature of the outdoor heat exchanger 23 does not rise above the predetermined temperature even after a predetermined time has elapsed since the start of the defrosting operation (step # 15), or the refrigerant is discharged from the compressor 21 during the defrosting operation.
- step # 16 when the temperature is lower than the predetermined temperature (step # 16), it is determined that the defrosting is poor, so the defrosting can be easily determined and the defrosting operation can be terminated.
- the present invention can be used for an air conditioner that performs heating operation and defrosting operation.
Abstract
Description
2 冷媒管
10 室内機
13 室内熱交換器
15 室内ファン
16 室内熱交換器温度センサ
20 室外機
21 圧縮機
22 四方弁
23 室外熱交換器
24 膨張弁
25 室外ファン
26 室外熱交換器温度センサ
27 吐出温度センサ
Claims (4)
- 冷凍サイクルを運転する圧縮機と、室外に配される室外熱交換器と、室内に配される室内熱交換器と、室外の空気を前記室外熱交換器に供給する室外ファンと、室内の空気を前記室内熱交換器に供給する室内ファンとを備え、前記室内ファン及び前記室外ファンを駆動して前記圧縮機により前記室内熱交換器及び前記室外熱交換器に一方向に冷媒を流通させて暖房運転を行うとともに、前記室外熱交換器の着霜時に冷媒を前記暖房運転時と逆方向に流通させて前記室内ファン及び前記室外ファンを停止した除霜運転を行う空気調和機において、前記除霜運転による除霜不良時に冷媒を前記暖房運転と同じ方向に流通させて前記室外ファンを駆動して前記室内ファンを停止した除霜準備運転を所定期間行った後に、前記除霜運転を再開することを特徴とする空気調和機。
- 前記除霜準備運転の前に前記暖房運転を所定期間行うことを特徴とする請求項1に記載の空気調和機。
- 前記除霜準備運転を開始して所定時間が経過した場合、または前記除霜準備運転中に前記室内熱交換器の温度が所定温度よりも上昇した場合に前記除霜運転を再開したことを特徴とする請求項1または請求項2に記載の空気調和機。
- 前記除霜運転を開始して所定時間が経過しても前記室外熱交換器の温度が所定温度よりも上昇しない場合、または前記除霜運転中に前記圧縮機の冷媒の吐出温度が所定温度よりも低下した場合に除霜不良と判断したことを特徴とする請求項1または請求項2に記載の空気調和機。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1350427A SE537196C2 (sv) | 2010-10-05 | 2011-09-02 | Klimatapparat med avfrostningsfunktion |
CN201180048219.3A CN103154623B (zh) | 2010-10-05 | 2011-09-02 | 空调 |
US13/824,414 US10006690B2 (en) | 2010-10-05 | 2011-09-02 | Air conditioner and method for controlling the air conditioner |
CA2811870A CA2811870C (en) | 2010-10-05 | 2011-09-02 | Air conditioner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-226099 | 2010-10-05 | ||
JP2010226099A JP5053430B2 (ja) | 2010-10-05 | 2010-10-05 | 空気調和機 |
Publications (1)
Publication Number | Publication Date |
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WO2012046528A1 true WO2012046528A1 (ja) | 2012-04-12 |
Family
ID=45927525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/070014 WO2012046528A1 (ja) | 2010-10-05 | 2011-09-02 | 空気調和機 |
Country Status (6)
Country | Link |
---|---|
US (1) | US10006690B2 (ja) |
JP (1) | JP5053430B2 (ja) |
CN (1) | CN103154623B (ja) |
CA (1) | CA2811870C (ja) |
SE (1) | SE537196C2 (ja) |
WO (1) | WO2012046528A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5897994B2 (ja) * | 2012-06-06 | 2016-04-06 | シャープ株式会社 | 空気調和機 |
JP6137461B2 (ja) * | 2013-03-29 | 2017-05-31 | 株式会社富士通ゼネラル | 空気調和機 |
JP6137462B2 (ja) * | 2013-03-29 | 2017-05-31 | 株式会社富士通ゼネラル | 空気調和機 |
CN104456859B (zh) * | 2013-09-12 | 2017-09-26 | 珠海格力电器股份有限公司 | 空调器及其除霜控制方法和装置 |
JP6367642B2 (ja) * | 2014-07-31 | 2018-08-01 | シャープ株式会社 | 空気調和機 |
KR102108616B1 (ko) * | 2014-10-07 | 2020-05-07 | 버터플라이 네트워크, 인크. | 초음파 신호 처리 회로와 관련 장치 및 방법 |
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Also Published As
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CN103154623B (zh) | 2016-03-23 |
CA2811870C (en) | 2018-05-22 |
SE1350427A1 (sv) | 2013-04-05 |
US20130180269A1 (en) | 2013-07-18 |
JP2012078065A (ja) | 2012-04-19 |
JP5053430B2 (ja) | 2012-10-17 |
CA2811870A1 (en) | 2012-04-12 |
CN103154623A (zh) | 2013-06-12 |
SE537196C2 (sv) | 2015-03-03 |
US10006690B2 (en) | 2018-06-26 |
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