WO2010116619A1 - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- WO2010116619A1 WO2010116619A1 PCT/JP2010/001853 JP2010001853W WO2010116619A1 WO 2010116619 A1 WO2010116619 A1 WO 2010116619A1 JP 2010001853 W JP2010001853 W JP 2010001853W WO 2010116619 A1 WO2010116619 A1 WO 2010116619A1
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- WO
- WIPO (PCT)
- Prior art keywords
- power
- circuit
- air conditioner
- unit
- indoor unit
- 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
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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
- F24F11/46—Improving electric energy efficiency or saving
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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
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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
- F24F2140/60—Energy consumption
Definitions
- the present invention relates to an air conditioner that includes an indoor unit and an outdoor unit, and is configured to supply driving power for the indoor unit via a crossover line between the outdoor unit and the unit.
- a separation type air conditioner composed of an indoor unit and an outdoor unit, and commercial AC power is supplied from the indoor unit to the outdoor unit via an AC power line between the units. After that, some outdoor units returned to DC power and then supplied again to the indoor units.
- This DC power is high voltage DC power (main power circuit output) when the air conditioner is in air conditioning operation, and low voltage DC when air conditioning operation is not performed (stopped or standby). It was electric power (output of auxiliary power circuit).
- High voltage DC power is necessary to drive the motor for the blower fan installed in the indoor unit, and low voltage DC power does not need to drive the motor when air conditioning operation is not performed. This is necessary for driving the control circuit.
- the main power supply circuit IMV drive circuit, supplying power for the outdoor fan motor
- standby power in the outdoor unit is reduced to the extent by the auxiliary power supply circuit. It was reduced.
- the driving of the main power supply circuit is started when the control circuit (such as a microcomputer) of the outdoor unit receives a start signal of air conditioning operation superimposed on a DC power line that supplies DC power from the outdoor unit to the indoor unit. It was something to do.
- the control circuit such as a microcomputer
- the indoor unit and the outdoor unit are It is connected by a total of three lines: a power line through which two commercial alternating currents flow and a signal line that shares one of these power lines.
- the commercial alternating current is directly supplied to the power line in the outdoor unit,
- the unit is supplied through an outdoor unit and a power line in this order.
- a special power supply circuit is required to apply a voltage higher than the voltage used for transmission / reception of a normal signal to the signal line, and at the same time, the indoor unit and the outdoor unit It is necessary to change the communication circuit to the specifications for this high voltage. Alternatively, even if this high voltage is not increased too much, it is necessary to supply a sufficient current to excite the relay. After the start of operation of the power supply circuit due to the difference between the low impedance of the relay exciting coil and the high impedance of the communication circuit It is also necessary to have a configuration that disconnects this relay.
- the present invention pays attention to the fact that the start of the indoor unit (start of the air conditioning operation) is linked with the start of the operation of the motor for the blower fan mounted on the indoor unit, and the current consumption due to the operation of the motor is reduced.
- the outdoor unit can determine the start of the air conditioning operation of the indoor unit. More specifically, the indoor unit and the outdoor unit are connected by two AC power lines and one signal line (whichever one of the AC power lines is shared) to supply AC power to the indoor unit.
- the outdoor unit only needs to include at least a switching circuit for exciting the relay and a CT for detecting current.
- the present invention has a refrigeration cycle in which at least a refrigerant compressor driven by an electric element, a heat source side heat exchanger, a decompression device, and a use side heat exchanger are connected in an annular shape by a refrigerant pipe,
- the refrigeration cycle components are separately installed in an indoor unit and an outdoor unit, and an electric motor that drives the blower fan of the use-side heat exchanger is provided in the indoor unit to drive the electric motor.
- the air conditioner configured to supply the electric power through the outdoor unit, the first power line, the second power line, and the power lines of the first power line through which an alternating current flows between the indoor unit and the outdoor unit.
- the outdoor unit includes a current detector that detects an alternating current flowing from the commercial AC power to either the first power supply line or the second power supply line, and a current detected by the current detector.
- a switch that performs circuit communication when the value exceeds a predetermined reference value, and an outdoor control circuit that is supplied with the commercial AC power through the switch and controls driving of the electric element
- the indoor unit includes an indoor control circuit for controlling supply of the commercial AC power obtained through the first power line and the second power line to the electric motor. The circuit starts driving of the electric motor in response to the start of the air conditioning operation, and transmits and receives signals via the signal line to the outdoor side control circuit of the outdoor side unit after driving the electric motor. It is intended.
- the predetermined reference value for performing the communication operation of the switch includes at least a current consumed by the electric motor. It is.
- the outdoor control circuit of the outdoor unit can be driven at least by driving the electric motor.
- the switch in addition to the air conditioner of claim 2, the switch comprises a normally open contact piece of a relay that constitutes a bypass circuit that bypasses the circuit after the circuit is connected.
- the normally open contact piece is closed by exciting the relay with an outdoor control circuit.
- the first outdoor side control circuit includes a microcomputer that starts operation when supplied with the commercial AC power, and the microcomputer is predetermined. After starting the obtained operation, a signal for determining the start of the air conditioning operation is acquired via the signal line to the indoor side control circuit of the indoor unit, and when the start of the air conditioning operation cannot be determined, the circuit of the switch is set. It is intended to open.
- a switching circuit for blocking the flow of the alternating current to the current detector after the normally open contact piece of the relay is closed is provided. It is a thing.
- This configuration prevents the current from flowing to the current detector after the start of the air conditioning operation of the air conditioner.
- the air conditioner of the present invention detects the current flowing through the power line when the indoor unit and the indoor unit are connected by three lines (two power lines and one signal line). Since the operation of the outdoor control circuit of the outdoor unit is started, the operation of the outdoor control circuit is used to start the air conditioning operation of the indoor unit using the existing three lines without exchanging special signals. It can be interlocked and can reduce standby power in the outdoor unit when the indoor unit is not performing the air conditioning operation.
- FIG. 1 is a schematic electric circuit diagram of an air conditioner according to an embodiment of the present invention.
- FIG. 1 is a schematic electric circuit diagram of an air conditioner composed of an indoor unit 1 and an outdoor unit 2.
- the outdoor unit 1 and the outdoor unit 2 are connected by three lines of power lines 3 and 4 and a signal line 5 through which AC power flows.
- the air conditioner includes components of a refrigerant compressor driven by the electric element 6, a heat source side heat exchanger (not shown), a pressure reducing device (not shown), and a use side heat exchanger (not shown).
- the indoor unit 1 is equipped with a use side heat exchanger
- the outdoor unit is equipped with a refrigerant compressor, a heat source side heat exchanger, and a pressure reducing device.
- the components of the refrigeration cycle that are separately mounted on the indoor unit 1 and the outdoor unit 2 are connected to each other by a refrigerant pipe.
- the outdoor unit 2 is equipped with a four-way switching valve 7, and the refrigerant flow discharged from the refrigerant compressor is changed to the heat source side heat exchanger, the pressure reducing device, the use side heat exchanger in this order, or the use side heat exchanger.
- the refrigerant piping is arranged so that the pressure reducing device and the heat source side heat exchanger can be selectively switched in this order.
- the energization is controlled.
- This power supply circuit 9 is connected to power supply buses 10 and 11 in the outdoor unit 2 connected to the power supply lines 3 and 4, a microcomputer 12 (corresponding to the outdoor control circuit) for controlling the operation of the indoor unit 2, and signal lines The operation power is also supplied to the outdoor communication circuit 13 that exchanges signals with the indoor unit 1 via 5.
- the four-way switching valve 7 switches the flow of the refrigerant when a predetermined direct current is supplied from the power supply circuit 9, and the supply of this direct current is controlled by the power supply circuit 9 according to a signal from the microcomputer 12.
- the electric motor 8 is an induction motor having two speed control taps for low speed and high speed, and the power supply circuit 9 switches which speed control tap the AC current is supplied to in response to a signal from the microcomputer 12. Yes, the electric motor 8 can be switched to stop, low speed, and high speed 3rd speed. If the electric element 6 is an induction motor similar to the electric motor 8, the power supply circuit 9 can perform ON / OFF control of the operation of the refrigerant compressor by switching the supply / interruption of the alternating current according to the signal from the microcomputer 12. it can.
- the capacity of the refrigerant compressor can be varied by changing the frequency and voltage of the AC power supplied to the electric element 6 using inverter technology. Further, when a DC brushless motor is used as the electric element 6, the ability of the refrigerant compressor is similarly changed by changing the energization timing and applied voltage of each stator winding in accordance with the rotational position of the rotor. I'm going.
- the operating capacity of the refrigerant compressor can be changed based on the air conditioning load.
- a current limiting PTC element 14 In the power supply bus 10 extending from the power supply circuit 9 to the power supply line 3, a current limiting PTC element 14, a normally open contact piece 15 (relay contact piece corresponding to a switch), and a CT (current detector) 17 are sequentially switched from the power supply circuit 9.
- a contact piece (relay contact piece corresponding to a changeover switch) 18 is connected.
- Reference numeral 16 denotes a normally open contact piece (relay contact piece corresponding to a switch), which is connected in parallel to a series circuit of the PTC element 14 and the normally open contact piece 15.
- the switching contact 18 is for switching between two contacts of the normally open A contact side and the normally closed B contact side, and the CT 17 flows to the power supply bus 10 when the switching contact 18 is on the normally closed B setting side. It detects AC current.
- the microcomputer 12 controls opening and closing of the normally open contact piece 16 and switching of the switching contact piece 18. Therefore, the normally open contact piece 16 and the switching contact piece 18 are in the state shown in the figure
- Reference numeral 19 denotes a power plug connected to a commercial AC power source. An AC current obtained through the power plug is supplied to the power buses 10 and 11 in the outdoor unit 2.
- the power bus 10 has a normally open contact 15. And the switching contact piece 18.
- Reference numeral 20 denotes an auxiliary power circuit, which is connected to the power buses 10 and 11 at a position where an alternating current from the power plug 19 is directly obtained.
- the auxiliary power circuit 20 supplies driving power to a comparator 21 and a reference current setting unit 22 that supplies a reference voltage to one input of the comparator.
- the normally open contact piece 15 is switched by the output of the comparator 21.
- the other input of the comparator 21 is applied after the output of CT17 is converted into a voltage corresponding to the current value detected by CT17 by a rectifying / smoothing circuit comprising a rectifier diode 23, a resistor 24 and a capacitor 25. Note that full-wave rectification may be used for rectification to increase the output.
- the output of the comparator 21 is inverted.
- the normally open contact piece 15 is closed to enable supply of an alternating current from the power supply bus 10 to the power supply circuit 9.
- the output voltage is 0, so that the relay coil is excited and the normally open contact 15 is closed.
- the output voltage of the comparator 21 is high (5 to 5). It may be configured to excite the relay coil.
- the alternating current is not supplied to the power supply circuit 9 and the microcomputer 12 is in the stop state, and the electric element 6, the electric motor 8, and the four-way switching valve 7. Also not energized. Since the auxiliary power supply circuit 20 is operated by being supplied with an alternating current, the comparator 21 is operating. When the current detected by the CT 17 exceeds the value set by the reference current setting device 22, the output of the comparator 21 is increased. It reverses and the normally open contact piece 15 is closed.
- the normally open contact piece 16 is a contact piece that is closed by exciting a coil of a relay (not shown), and is energized through a drive circuit of the relay in response to a signal from the microcomputer 12.
- the switching contact piece 18 switches the contact piece between the A contact side and the B contact side in response to a signal from the microcomputer 12. This switching contact piece 18 is switched from the B contact side to the A contact side in the same manner as the normally open contact piece 16 is closed, and the output of the comparator 21 is not reversed regardless of the current value detected by the CT 17.
- the opening piece 15 remains open.
- the operation of the microcomputer 12 is continued until the normally open contact piece 16 is opened by the microcomputer 12.
- the microcomputer 12 After closing the normally open contact piece 16 and switching the switching contact piece 18, whether or not the indoor unit 1 is in an air conditioning operation state via the communication circuit 13 and the signal line 5, that is, the indoor unit 1 is the user.
- a signal for requesting information on whether or not the air-conditioning operation is automatically started by direct operation or timer operation is output.
- the microcomputer 12 keeps the normally open contact piece 16 closed when the signal transmitted from the indoor unit 1 via the signal line 5 includes a signal indicating that the air conditioning operation is in progress.
- the switching contact piece 18 is maintained in the state switched to the A contact side and the operation is maintained.
- the signal transmitted from the outdoor unit 1 does not include a signal indicating that it is in the air conditioning operation state, it is determined that the output inversion of the previous comparator 21 is due to a malfunction and the normally open contact piece 16 is The switching contact piece 18 is returned to the B contact side, and the indoor unit 2 returns to the stopped state.
- the indoor unit 1 includes a microcomputer 26 (corresponding to an indoor control circuit) that controls the operation of the indoor unit 1, an indoor communication circuit 27 that is connected to the signal line 5 and exchanges signals with the outdoor unit 2, A signal transmitted in response to the key operation from the inner power supply circuit 28, the electric motor 29 for controlling the supply of power from the power supply circuit 28 and driving the blower fan for blowing air to the use side heat exchanger, and the remote controller 31
- a receiving circuit 30 that receives (for example, an infrared signal), demodulates it, and outputs it to the microcomputer 26 is provided.
- the microcomputer 26 starts the operation of the electric motor 29 via the power supply circuit 8 when the operation start time is reached by the operation of the remote controller 31 or the direct operation of the switch provided in the indoor unit 1 or the timer operation.
- the electric motor 29 an electric element mounted on the outdoor unit 2, an induction motor, a brushless motor, or the like can be used similarly to the electric motor, and the number of rotations can be controlled.
- the rotation speed of the electric motor 29 is automatically controlled based on the room temperature (controlled temperature) and the set temperature (target temperature). Alternatively, the number of rotations is controlled by the user.
- the minimum rotational speed of the electric motor 29 is set in terms of the structure and characteristics of both the induction motor and the brushless motor, and the electric motor 29 is operated at the minimum rotational speed or higher.
- the electric motor 29 As long as the electric motor 29 is in operation, the amount of electricity exceeding the current required for the minimum rotational speed is consumed.
- the current consumed by the electric motor 29 is supplied through the power supply circuit 28, the power supply lines 3 and 4, the outdoor unit 2, the CT 27, and the power supply plug 19.
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
Description
2 室外側ユニット
3、4 電源ライン
5 信号線
6 電動要素
9 電源回路
12 マイコン
15 常開接片
17 CT
18 切り替え接片
26 マイコン
29 電動機 DESCRIPTION OF SYMBOLS 1 Indoor unit 2
18 Switching piece
26
Claims (6)
- 少なくとも電動要素で駆動される冷媒圧縮機、熱源側熱交換器、減圧装置、利用側熱交換器を冷媒配管で環状に接続した冷凍サイクルを有し、この冷凍サイクルの構成要素を室内側ユニットと室外側ユニットと分けて搭載すると共に、前記室内側ユニットには前記利用側熱交換器の送風ファンを駆動する電動機を設け、当該電動機を駆動するための電力を前記室外側ユニットを介して供給するように成した空気調和機において、
前記室内ユニットと前記室外ユニットとを交流電流が流れる第1の電源ライン、第2の電源ラインとこれら電源ラインのいずれか一方を共用線として信号を伝送する信号線との3本でつなぎ、第1の電源ラインと第2の電源ラインに商用の交流電力を前記室外側ユニット内で接続し、前記室外ユニットには、この商用の交流電力から第1の電源ライン若しくは第2の電源ラインのいずれかに流れる交流電流を検出する電流検出器と、この電流検出器の検出する電流値が予め定めた基準値を上回った際に回路の連通動作を成すスイッチと、このスイッチを介して前記商用の交流電力が供給され前記電動要素の駆動を制御する室外側制御回路とを備え、前記室内ユニットには、前記第1の電源ライン及び第2の電源ラインを介して得られる前記商用の交流電力の前記電動機への供給を制御する室内側御回路とを備え、この室内側制御回路は空調運転の開始に応答して前記電動機の駆動を開始させると共に当該電動機の駆動後に前記室外側ユニットの前記室外側制御回路と信号線を介して信号の授受を行うことを特徴とする空気調和機。 At least a refrigerant compressor driven by an electric element, a heat source side heat exchanger, a pressure reducing device, and a use side heat exchanger are connected in a ring shape with refrigerant piping, and the components of the refrigeration cycle are an indoor unit. In addition to being mounted separately from the outdoor unit, the indoor unit is provided with an electric motor for driving the blower fan of the use side heat exchanger, and electric power for driving the electric motor is supplied via the outdoor unit. In the air conditioner
The indoor unit and the outdoor unit are connected by a first power line through which an alternating current flows, a second power line, and a signal line that transmits a signal using one of these power lines as a shared line, Commercial AC power is connected in the outdoor unit to the first power line and the second power line, and either the first power line or the second power line is connected to the outdoor unit from the commercial AC power. A current detector that detects the alternating current flowing through the switch, a switch that performs circuit communication when the current value detected by the current detector exceeds a predetermined reference value, and the commercial power supply via the switch. An outdoor control circuit that is supplied with AC power and controls driving of the electric element, and the indoor unit includes the quotient obtained through the first power line and the second power line. An indoor side control circuit for controlling the supply of alternating current power to the electric motor. An air conditioner, wherein a signal is exchanged with the outdoor control circuit of the unit through a signal line. - 前記スイッチの連通動作を成す際の前記予め定めた基準値は少なくとも前記電動機で消費される電流を含むことを特徴とする請求項1に記載の空気調和機。 2. The air conditioner according to claim 1, wherein the predetermined reference value for performing the communication operation of the switch includes at least a current consumed by the electric motor.
- 前記スイッチが回路の連通動作を成した後にこの回路をバイパスするバイパス回路を構成するリレーの常開接片を備え、当該常開接片は室外側制御回路で前記リレーを励磁して閉じられることを特徴とする請求項2に記載の空気調和機。 The switch has a normally open contact piece of a relay that constitutes a bypass circuit that bypasses the circuit after the circuit has been connected, and the normally open contact piece is closed by exciting the relay in an outdoor control circuit. The air conditioner according to claim 2.
- 運転開始時は室内ユニットに搭載された電動機の運転を開始することを特徴とする請求項1乃至請求項3に記載の空気調和機。 The air conditioner according to any one of claims 1 to 3, wherein the operation of the electric motor mounted on the indoor unit is started when the operation is started.
- 前期室外側制御回路は前記商用の交流電力が供給されて動作を開始するマイコンを有し、
当該マイコンが予め定められえた動作を開始した後室内側ユニットの室内側制御回路へ前記信号線を介して空調運転の開始を判断する信号を取得し、当該空調運転の開始が判断できなかった際に前記スイッチの回路を開くことを特徴とする請求項4に記載の空気調和機。 The outdoor control circuit of the previous period has a microcomputer that starts operation when supplied with the commercial AC power,
When the microcomputer starts a predetermined operation and then acquires a signal for determining the start of the air-conditioning operation via the signal line to the indoor-side control circuit of the indoor unit, and when the start of the air-conditioning operation cannot be determined The air conditioner according to claim 4, wherein a circuit of the switch is opened. - 前記リレーの常開接片が閉じた後に前期電流検出器への前記交流電流の流れを阻止する切換回路を設けたことを特徴等する請求項4に記載の空気調和機。 The air conditioner according to claim 4, further comprising a switching circuit that blocks the flow of the alternating current to the current detector after the normally open contact piece of the relay is closed.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10761327.5A EP2418433A4 (en) | 2009-04-06 | 2010-03-16 | Air conditioner |
CN201080015051.1A CN102388273B (en) | 2009-04-06 | 2010-03-16 | Air conditioner |
US13/201,835 US20120234029A1 (en) | 2009-04-06 | 2011-03-16 | Air conditioner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-092031 | 2009-04-06 | ||
JP2009092031A JP5381252B2 (en) | 2009-04-06 | 2009-04-06 | Air conditioner |
Publications (1)
Publication Number | Publication Date |
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WO2010116619A1 true WO2010116619A1 (en) | 2010-10-14 |
Family
ID=42935919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/001853 WO2010116619A1 (en) | 2009-04-06 | 2010-03-16 | Air conditioner |
Country Status (5)
Country | Link |
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US (1) | US20120234029A1 (en) |
EP (1) | EP2418433A4 (en) |
JP (1) | JP5381252B2 (en) |
CN (1) | CN102388273B (en) |
WO (1) | WO2010116619A1 (en) |
Cited By (1)
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CN102820840A (en) * | 2011-06-10 | 2012-12-12 | 北京理工大学 | Method for sampling current of brushless direct current motor |
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JP5404582B2 (en) * | 2010-11-15 | 2014-02-05 | 三菱電機株式会社 | Air conditioner |
JP5830719B2 (en) * | 2011-05-16 | 2015-12-09 | パナソニックIpマネジメント株式会社 | Control device for multi-room air conditioner |
JP5595560B2 (en) * | 2013-07-04 | 2014-09-24 | 三菱電機株式会社 | Air conditioner |
CN104979817B (en) * | 2015-06-30 | 2019-02-22 | 青岛海尔科技有限公司 | A kind of anti-error protection circuit of domestic air conditioning indoor and outdoor communication |
JP6505256B2 (en) * | 2016-01-06 | 2019-04-24 | 三菱電機株式会社 | Air conditioner |
JP6881503B2 (en) * | 2019-05-31 | 2021-06-02 | ダイキン工業株式会社 | Air conditioning system |
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2009
- 2009-04-06 JP JP2009092031A patent/JP5381252B2/en not_active Expired - Fee Related
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2010
- 2010-03-16 WO PCT/JP2010/001853 patent/WO2010116619A1/en active Application Filing
- 2010-03-16 CN CN201080015051.1A patent/CN102388273B/en not_active Expired - Fee Related
- 2010-03-16 EP EP10761327.5A patent/EP2418433A4/en not_active Withdrawn
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2011
- 2011-03-16 US US13/201,835 patent/US20120234029A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
---|---|
JP5381252B2 (en) | 2014-01-08 |
US20120234029A1 (en) | 2012-09-20 |
CN102388273A (en) | 2012-03-21 |
CN102388273B (en) | 2014-04-02 |
EP2418433A1 (en) | 2012-02-15 |
EP2418433A4 (en) | 2016-03-23 |
JP2010243059A (en) | 2010-10-28 |
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