JP2009014225A - Air conditioner - Google Patents

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JP2009014225A
JP2009014225A JP2007174282A JP2007174282A JP2009014225A JP 2009014225 A JP2009014225 A JP 2009014225A JP 2007174282 A JP2007174282 A JP 2007174282A JP 2007174282 A JP2007174282 A JP 2007174282A JP 2009014225 A JP2009014225 A JP 2009014225A
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unit
power supply
capacitor
outdoor unit
transmission line
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JP5125262B2 (en
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Akira Kasamatsu
晃 笠松
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Daikin Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of reducing a circuit size and manufacturing costs besides reducing standby power. <P>SOLUTION: When a control portion for indoor unit 11 makes a relay MR10 conductive, electric current from a main power supply portion 26 flows to a capacitor C22 through the relay MR10, a transmission line COML, a resistor R1 and a diode D1. A power supply portion for controlling outdoor unit 22 supplies voltage of both ends of the charged capacitor C22 to a control portion for outdoor unit 21 as operating voltage. The control portion for outdoor unit 21 receiving the supply of the operating voltage makes a relay MRM20 conductive. The electric current from the main power supply portion 26 flows to the capacitor C22 through the relay MRM20, a resistor R2, and diodes D22a-D22d by conduction of the relay MRM20. Then the control portion for indoor unit 11 makes the relay MR10 non-conductive, and the control portion for indoor unit 11 and the control portion for outdoor unit 21 are transferred to normal operations. In the normal operation, the capacitor C22 is not charged through the relay MR10 and the transmission line COML. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は空気調和機に関し、特に室外機側に電源がある室外受電機であっても、待機電源を低減する技術に関する。   The present invention relates to an air conditioner, and more particularly to a technique for reducing standby power even in an outdoor receiving electric machine having a power supply on the outdoor unit side.

特許文献１には、室内機と、室外機と、室内機及び室外機に電源を供給する電源線と、室内機及び室外機の通信用の伝送線とを有する空気調和機が開示されている。この空気調和機において、動作を停止しているときに（待機状態のときに）室外機の待機電源を除き、動作を開始する起動時において室内機から室外機へと電源を供給して室外機を起動している。   Patent Document 1 discloses an air conditioner having an indoor unit, an outdoor unit, a power supply line that supplies power to the indoor unit and the outdoor unit, and a communication transmission line for the indoor unit and the outdoor unit. . In this air conditioner, when the operation is stopped (when in the standby state), the outdoor unit is powered off by supplying power from the indoor unit to the outdoor unit at the time of starting the operation except for the standby power source of the outdoor unit. Has started.

具体的には、室外機は、室外機制御部と、当該室外機制御部と伝送線とを接続する第１接続関係及び当該室外機制御部と電源線とを接続する第２接続関係の何れか一方を選択する第１スイッチとを有している。室内機は伝送線と電源線とを接続する第２スイッチを有している。   Specifically, the outdoor unit includes any one of an outdoor unit control unit, a first connection relationship that connects the outdoor unit control unit and a transmission line, and a second connection relationship that connects the outdoor unit control unit and a power line. And a first switch for selecting one of them. The indoor unit has a second switch that connects the transmission line and the power supply line.

待機状態において室外機では、第１スイッチは第１接続関係を選択している。よって、待機状態では電源線と室外機制御部の接続は遮断されている。   In the outdoor unit in the standby state, the first switch selects the first connection relationship. Therefore, in the standby state, the connection between the power line and the outdoor unit controller is cut off.

そして、起動時において室内機が自身の第２スイッチを制御して電源線と伝送線とを接続する。よって、電源線を介して室内機へと供給された電源が第２スイッチ、伝送線を介して室外機へと伝達する。室外機では伝送線を介して室外機制御部へと当該電源が供給されて室外機制御部を起動することができる。   At the time of activation, the indoor unit controls its second switch to connect the power line and the transmission line. Therefore, the power supplied to the indoor unit via the power line is transmitted to the outdoor unit via the second switch and the transmission line. In the outdoor unit, the power is supplied to the outdoor unit control unit via the transmission line, and the outdoor unit control unit can be activated.

なお、関連する技術として特許文献２〜４が開示されている。   Patent documents 2 to 4 are disclosed as related techniques.

特開２００５−２５７２３８号公報JP 2005-257238 A 特開２００５−２５７２３９号公報JP 2005-257239 A 特開２００６−１５３３４６号公報JP 2006-153346 A 特許第３０１９８４４号Patent 3019844

しかしながら、特許文献１に記載の空気調和機においては、第１スイッチを用いているので、スイッチ損失が生じるとともに、回路規模や製造コストが増大していた。   However, in the air conditioner described in Patent Document 1, since the first switch is used, switch loss occurs, and the circuit scale and manufacturing cost increase.

そこで、本発明は、回路規模や製造コストを低減する空気調和機を提供することを目的とする。   Then, an object of this invention is to provide the air conditioner which reduces a circuit scale and manufacturing cost.

本発明にかかる空気調和機の第１の態様は、交流が供給される第１及び第２電源供給線(ACL1,ACL2)と、伝送線(COML)と、前記伝送線と前記第１電源供給線との導通／非導通を制御する第１選択部(MR10)を有する室内機(10)と、動作電圧を受けて動作する室外機制御部(21)と、前記室外機制御部の制御によって導通し、当該制御がなければ非導通となる第２選択部(MRM10;MRM20)と、第２電源供給線と接続され、前記第２選択部を介して前記第１電源供給線にも接続される内部負荷(23；24,25)と、前記第２選択部を介して前記第１電源供給線に接続される第１充電経路(D22a，D22c)と、前記伝送線に接続される第２充電経路(R1,D1；D2)と、前記第１充電経路及び前記第２充電経路と接続されて、前記第２電源供給線を流れる電流によって充電されるコンデンサ(C22;C22a,C22b)とを含み、当該コンデンサの両端電圧を前記動作電圧として出力する室外制御電力供給部(22)とを有する室外機(20)とを備える。   The first aspect of the air conditioner according to the present invention includes first and second power supply lines (ACL1, ACL2) to which alternating current is supplied, a transmission line (COML), the transmission line, and the first power supply. An indoor unit (10) having a first selection unit (MR10) for controlling conduction / non-conduction with a line, an outdoor unit control unit (21) that operates by receiving an operating voltage, and control of the outdoor unit control unit The second selection unit (MRM10; MRM20) that is conductive and is non-conductive if there is no such control is connected to the second power supply line, and is also connected to the first power supply line via the second selection unit. Internal load (23; 24, 25), a first charging path (D22a, D22c) connected to the first power supply line via the second selector, and a second connected to the transmission line. Capacitors (C22; C22a, C22) connected to the charging path (R1, D1; D2), the first charging path and the second charging path, and charged by the current flowing through the second power supply line. and an outdoor unit (20) having an outdoor control power supply unit (22) that outputs the voltage across the capacitor as the operating voltage.

本発明にかかる空気調和機の第２の態様は、第１の態様にかかる空気調和機であって、空気調和機前記室外機(20)は、空気調和に関する室外機駆動機構(27)と、前記コンデンサ(C22;C22a,C22b)の両端電圧が入力されて、前記室外機駆動機構へと駆動電流を供給する室外機駆動電力供給部(23)を更に備える。   A second aspect of the air conditioner according to the present invention is the air conditioner according to the first aspect, wherein the air conditioner outdoor unit (20) includes an outdoor unit drive mechanism (27) related to air conditioning, An outdoor unit drive power supply unit (23) that receives a voltage across the capacitor (C22; C22a, C22b) and supplies a drive current to the outdoor unit drive mechanism is further provided.

本発明にかかる空気調和機の第３の態様は、第１または第２の態様にかかる空気調和機であって、前記第２充電経路（D22a，D22c）及び前記第２電源供給線（ACL2）は、前記コンデンサ(C22;C22a,C22b)を充電する倍電圧整流回路を構成する。   A third aspect of the air conditioner according to the present invention is the air conditioner according to the first or second aspect, wherein the second charging path (D22a, D22c) and the second power supply line (ACL2) are provided. Constitutes a voltage doubler rectifier circuit for charging the capacitors (C22; C22a, C22b).

本発明にかかる空気調和機の第４の態様は、第１乃至第３の何れか一つにかかる空気調和機であって、前記内部負荷(24,25)は、前記伝送線(COML)を介して前記コンデンサ(C22;C22a,C22b)の低電位側端の電位以上の電位を信号として前記室内機(10)へ伝達する通信部(25)を有しており、前記第２充電経路(R1,D1;D2)は、アノードが前記コンデンサの前記低電位側端と、カソードが前記伝送線と接続された整流素子（D1）を有する。   A fourth aspect of the air conditioner according to the present invention is the air conditioner according to any one of the first to third, wherein the internal load (24, 25) includes the transmission line (COML). Via a communication unit (25) that transmits a potential equal to or higher than the potential of the low potential side end of the capacitor (C22; C22a, C22b) to the indoor unit (10) as a signal, and the second charging path ( R1, D1; D2) includes a rectifier element (D1) having an anode connected to the low potential side end of the capacitor and a cathode connected to the transmission line.

本発明にかかる空気調和機の第５の態様は、第１乃至第３の何れか一つにかかる空気調和機であって、前記内部負荷(24,25)は、前記伝送線(COML)を介して前記コンデンサ(C22;C22a,C22b)の高電位側端の電位以下の電位を信号として前記室内機(10)へ伝達する通信部(25)を有し、前記第２充電経路(R1,D1;D2)は、カソードが前記コンデンサの高電位側端と、アノードが前記伝送線と接続された整流素子（D2）を有する。   A fifth aspect of the air conditioner according to the present invention is the air conditioner according to any one of the first to third, wherein the internal load (24, 25) includes the transmission line (COML). A communication unit (25) for transmitting a potential equal to or lower than the potential at the high potential side end of the capacitor (C22; C22a, C22b) to the indoor unit (10) as a signal, and the second charging path (R1, D1; D2) has a rectifier element (D2) having a cathode connected to the high potential side end of the capacitor and an anode connected to the transmission line.

本発明にかかる空気調和機の第６の態様は、第５の態様にかかる空気調和機であって、前記通信部(25)は、前記伝送線(COML)を介して、前記コンデンサ(C22;C22a,C22b)の低電位側の電位以上且つ前記コンデンサの高電位側の電位以下の電位を信号として前記室内機(10)へ伝達し、前記第２充電経路(R1,D1;D2)は、アノードが前記コンデンサの低電位側と、カソードが前記伝送線と接続された整流素子（D1）を更に有する。   The 6th aspect of the air conditioner concerning this invention is an air conditioner concerning a 5th aspect, Comprising: The said communication part (25) is the said capacitor | condenser (C22;) via the said transmission line (COML). C22a, C22b) is transmitted to the indoor unit (10) as a signal a potential not lower than the low potential side potential and not higher than the high potential side potential of the capacitor, the second charging path (R1, D1; D2), It further has a rectifying element (D1) having an anode connected to the low potential side of the capacitor and a cathode connected to the transmission line.

本発明にかかる空気調和機の第１の態様によれば、第１選択部が導通することにより、コンデンサは第１電源供給線と伝送線と、第２充電経路と、第２電源供給線とを流れる電流によって充電される。かかる充電により、室外機制御部が給電され、その動作が可能となる。そして室外機制御部が動作可能となることにより、第２選択部を導通させることができる。これにより内部負荷に電源が供給される。しかも、コンデンサは第１充電経路によって充電されるので、第２充電経路をカットすることができる。具体的には、第１選択部を非導通にできるので、一旦、第１充電経路による充電が生じた後は、伝送線に充電電流を流す必要が無く、信号伝達のために伝送線を用いることができる。   According to the 1st aspect of the air conditioner concerning this invention, when a 1st selection part conduct | electrically_connects, a capacitor | condenser is a 1st power supply line, a transmission line, a 2nd charging path, and a 2nd power supply line. It is charged by the current flowing through it. By such charging, the outdoor unit control unit is supplied with power and can operate. When the outdoor unit control unit becomes operable, the second selection unit can be conducted. As a result, power is supplied to the internal load. Moreover, since the capacitor is charged by the first charging path, the second charging path can be cut. Specifically, since the first selection unit can be made non-conductive, it is not necessary to flow a charging current through the transmission line once charging is performed through the first charging path, and the transmission line is used for signal transmission. be able to.

また、第１電源供給線と接続する第１充電経路と、伝送線と接続する第２充電経路との切替えが可能なスイッチを設ける態様に比べて、このスイッチを不要とすることができ、ひいては回路規模や製造コストを低減することができる。   Moreover, this switch can be made unnecessary compared with the aspect which provides the switch which can switch between the 1st charge path | route connected with a 1st power supply line, and the 2nd charge path | route connected with a transmission line, and by extension. The circuit scale and manufacturing cost can be reduced.

本発明にかかる空気調和機の第２の態様によれば、同じコンデンサを用いて室外機制御部及び室外機駆動電力供給部へと電力を供給できる。よって、回路規模や製造コストを低減できる。   According to the 2nd aspect of the air conditioner concerning this invention, electric power can be supplied to an outdoor unit control part and an outdoor unit drive electric power supply part using the same capacitor | condenser. Therefore, the circuit scale and manufacturing cost can be reduced.

本発明にかかる空気調和機の第３の態様によれば、室外機制御電力供給部及び室外機駆動電力供給部への電圧を高くできる。   According to the 3rd aspect of the air conditioner concerning this invention, the voltage to an outdoor unit control electric power supply part and an outdoor unit drive electric power supply part can be made high.

本発明にかかる空気調和機の第４の態様によれば、第１選択部が非導通であり、室外機制御部の制御により通第２選択部が導通しているときに、第１充電経路を介してコンデンサから伝送線へと電流が流れることを防ぐ。   According to the 4th aspect of the air conditioner concerning this invention, when the 1st selection part is non-conduction and the 2nd selection part has conduct | electrically_connected by control of an outdoor unit control part, it is 1st charge path | route. Prevents current from flowing from the capacitor to the transmission line.

本発明にかかる空気調和機の第５の態様によれば、第１選択部が非導通且つ第２選択部が導通しているときに、第１充電経路を介してコンデンサから伝送線へと電流が流れることを防ぐ。   According to the fifth aspect of the air conditioner of the present invention, when the first selection unit is non-conductive and the second selection unit is conductive, the current is transferred from the capacitor to the transmission line through the first charging path. To prevent the flow.

本発明にかかる空気調和機の第６の態様によれば、第２充電経路及び第２電源供給線を介して全波整流してコンデンサを充電でき、ひいてはコンデンサの充電に要する時間を短縮できる。更に第２および第３の態様にかかる場合は、室外機制御部及び室外機駆動電力供給部への突電流を低減することができる。   According to the sixth aspect of the air conditioner of the present invention, the capacitor can be charged by full-wave rectification via the second charging path and the second power supply line, and thus the time required for charging the capacitor can be shortened. Furthermore, in the case of the second and third aspects, it is possible to reduce the rush current to the outdoor unit control unit and the outdoor unit driving power supply unit.

第１の実施の形態．
本発明に係る第１の実施の形態の空気調和機の一例の概念的な構成図を図１に示す。 First embodiment.
The conceptual block diagram of an example of the air conditioner of 1st Embodiment which concerns on this invention is shown in FIG.

本空気調和機１は、交流が供給される電源供給線ＡＣＬ１，ＡＣＬ２と、伝送線ＣＯＭＬと、室内機１０と、室外機２０とを備えている。室内機１０と室外機２０はそれぞれ電源供給線ＡＣＬ１，ＡＣＬ２、伝送線ＣＯＭＬによって相互に接続されている。   The air conditioner 1 includes power supply lines ACL1 and ACL2 to which alternating current is supplied, a transmission line COML, an indoor unit 10, and an outdoor unit 20. The indoor unit 10 and the outdoor unit 20 are connected to each other by power supply lines ACL1, ACL2 and a transmission line COML, respectively.

室内機１０は、室内機制御部１１と、室内機制御電力供給部１２と、室内機通信部１５と、室内機選択部ＭＲ１０（例えばリレー、以下リレーＭＲ１０と呼ぶ）とを備えている。   The indoor unit 10 includes an indoor unit control unit 11, an indoor unit control power supply unit 12, an indoor unit communication unit 15, and an indoor unit selection unit MR10 (for example, a relay, hereinafter referred to as a relay MR10).

室内機制御電力供給部１２は電源供給線ＡＣＬ１，ＡＣＬ２の間に接続されており、当該電源供給線ＡＣＬ１，ＡＣＬ２を介して入力された交流電圧を直流電圧に変換して室内機制御部１１へと供給する。   The indoor unit control power supply unit 12 is connected between the power supply lines ACL1 and ACL2. The AC voltage input via the power supply lines ACL1 and ACL2 is converted into a DC voltage to the indoor unit control unit 11. And supply.

リレーＭＲ１０は電源供給線ＡＣＬ１と伝送線ＣＯＭＬとの間に接続されて、伝送線ＣＯＭＬと電源供給線ＡＣＬ１との導通／非導通を選択する。   Relay MR10 is connected between power supply line ACL1 and transmission line COML, and selects conduction / non-conduction between transmission line COML and power supply line ACL1.

室内機制御部１１はリレーＭＲ１０を制御する。また、図示せぬリモコン等によりユーザから入力された運転指令を認識することができる。運転指令とは待機中の空気調和機１を起動して、運転を開始させるための指令である。   The indoor unit control unit 11 controls the relay MR10. In addition, an operation command input from the user can be recognized by a remote controller (not shown). The operation command is a command for starting the air conditioner 1 in standby and starting the operation.

室内機通信部１５は電源供給線ＡＣＬ２と伝送線ＣＯＭＬとの間に接続されて、伝送線ＣＯＭＬを介して室外機２０と相互に信号を送受信する。室内機通信部１５の内部構成については後に詳述する。   The indoor unit communication unit 15 is connected between the power supply line ACL2 and the transmission line COML, and transmits / receives signals to / from the outdoor unit 20 via the transmission line COML. The internal configuration of the indoor unit communication unit 15 will be described in detail later.

室外機２０は、室外機制御部２１と、室外機制御電力供給部２２と、室外機駆動電力供給部２３と、伝送電力供給部２４と、室外機通信部２５と、主電力供給部２６と、室外機駆動部２７と、室外機遮断部２８と、雑音低減部ＬＣ１と、リレーＭＲＭ１１とを備えている。   The outdoor unit 20 includes an outdoor unit control unit 21, an outdoor unit control power supply unit 22, an outdoor unit drive power supply unit 23, a transmission power supply unit 24, an outdoor unit communication unit 25, and a main power supply unit 26. The outdoor unit drive unit 27, the outdoor unit blocking unit 28, the noise reduction unit LC1, and the relay MRM 11 are provided.

主電力供給部２６は、電源供給線ＡＣＬ１，ＡＣＬ２と接続されており、当該電源供給線ＡＣＬ１，ＡＣＬ２の間に交流を供給する。なお、主電力供給部２６は室外機２０の代わりに室内機１０が備えていてもよい。   The main power supply unit 26 is connected to the power supply lines ACL1 and ACL2, and supplies alternating current between the power supply lines ACL1 and ACL2. The main power supply unit 26 may be included in the indoor unit 10 instead of the outdoor unit 20.

雑音低減部ＬＣ１は電源供給線ＡＣＬ１及びＡＣＬ２の両方に介在して、電源供給線ＡＣＬ１，ＡＣＬ２間の交流のノイズを除去する。   The noise reduction unit LC1 is interposed in both the power supply lines ACL1 and ACL2, and removes AC noise between the power supply lines ACL1 and ACL2.

室外機制御部２１は室外機制御電力供給部２２から動作電圧を受けて動作する。   The outdoor unit control unit 21 operates by receiving an operating voltage from the outdoor unit control power supply unit 22.

室外機遮断部２８は、選択部ＭＲＭ１０（例えばリレー；以下リレーＭＲＭ１０と呼ぶ）と、選択部ＭＲＭ２０（例えばリレー；以下リレーＭＲＭ２０と呼ぶ）と、抵抗Ｒ２とを備えている。リレーＭＲＭ１０は一端が電源供給線ＡＣＬ１と接続されている。リレーＭＲＭ２０と抵抗Ｒ２は相互に直列に接続されており、当該リレーＭＲＭ２０と抵抗Ｒ２の一組はリレーＭＲＭ１０と並列に接続されている。リレーＭＲＭ１０，ＭＲＭ２０は室外機制御部２１の制御によって導通し、当該制御がなければ非導通となる。   The outdoor unit cutoff unit 28 includes a selection unit MRM10 (for example, a relay; hereinafter referred to as relay MRM10), a selection unit MRM20 (for example, a relay; hereinafter referred to as relay MRM20), and a resistor R2. Relay MRM10 has one end connected to power supply line ACL1. Relay MRM20 and resistor R2 are connected in series with each other, and one set of relay MRM20 and resistor R2 is connected in parallel with relay MRM10. Relays MRM10 and MRM20 are turned on under the control of the outdoor unit control unit 21, and are turned off when there is no such control.

室外機制御電力供給部２２は、ＤＣ−ＤＣコンバータ２２０と、ダイオードＤ１，Ｄ２２ａ〜Ｄ２２ｄと、コンデンサＣ２２と、抵抗Ｒ１とを備えている。   The outdoor unit control power supply unit 22 includes a DC-DC converter 220, diodes D1, D22a to D22d, a capacitor C22, and a resistor R1.

ダイオードＤ２２ａ〜Ｄ２２ｄは全波整流回路を構成している。より具体的には、ダイオードＤ２２ａ，Ｄ２２ｂのカソードがコンデンサＣ２２の一端（以下、高電位側端と呼ぶ）に接続され、ダイオードＤ２２ｃ，Ｄ２２ｄのアノードがコンデンサＣ２２の他端（以下、低電位側端と呼ぶ）に接続されている。ダイオードＤ２２ｂのアノード及びダイオードＤ２２ｄのカソードは共通して電源供給線ＡＣＬ２に接続されている。ダイオードＤ２２ａのアノード及びダイオードＤ２２ｃのカソードは共通して、室外機遮断部２８を介して電源供給線ＡＣＬ１と接続されている。なお、ダイオードＤ２２ａ，Ｄ２２ｃからなる経路は、室外機遮断部２８を介して電源供給線ＡＣＬ１と接続され、コンデンサＣ２２を充電する電流が流れる第１充電経路と把握できる。   Diodes D22a to D22d constitute a full-wave rectifier circuit. More specifically, the cathodes of the diodes D22a and D22b are connected to one end (hereinafter referred to as a high potential side end) of the capacitor C22, and the anodes of the diodes D22c and D22d are the other end of the capacitor C22 (hereinafter referred to as a low potential side end). Connected). The anode of the diode D22b and the cathode of the diode D22d are commonly connected to the power supply line ACL2. The anode of the diode D22a and the cathode of the diode D22c are commonly connected to the power supply line ACL1 via the outdoor unit cutoff unit 28. The path formed by the diodes D22a and D22c is connected to the power supply line ACL1 via the outdoor unit cutoff unit 28, and can be understood as a first charging path through which a current for charging the capacitor C22 flows.

ダイオードＤ１はアノードがコンデンサＣ１の低電位側端と、カソードが抵抗Ｒ１を介して伝送線ＣＯＭＬと接続されている。なお、ダイオードＤ１、抵抗Ｒ１からなる経路は、伝送線ＣＯＭＬに接続され、コンデンサＣ２２を充電する電流が流れる第２充電経路と把握することができる。   The diode D1 has an anode connected to the low potential side end of the capacitor C1, and a cathode connected to the transmission line COML via the resistor R1. The path formed by the diode D1 and the resistor R1 is connected to the transmission line COML and can be understood as a second charging path through which a current for charging the capacitor C22 flows.

ＤＣ−ＤＣコンバータ２２０はコンデンサＣ２２の両端と接続され、コンデンサＣ２２の両端電圧を所望の電圧に変換して当該電圧を動作電圧として室外機制御部２１へと出力する。   The DC-DC converter 220 is connected to both ends of the capacitor C22, converts the voltage across the capacitor C22 into a desired voltage, and outputs the voltage as an operating voltage to the outdoor unit control unit 21.

リレーＭＲＭ１１は一端が電源供給線ＡＣＬ２に接続されている。リレーＭＲＭ１１は室外機制御部２１によって制御される。なお、リレーＭＲＭ１１は、配線の接続ミスによる感電防止用として設けられているが、配線の接続ミスが生じ得ない場合はなくても構わない。   One end of relay MRM11 is connected to power supply line ACL2. The relay MRM 11 is controlled by the outdoor unit control unit 21. The relay MRM 11 is provided for preventing an electric shock due to a wiring connection mistake. However, the relay MRM 11 may be omitted if a wiring connection mistake cannot occur.

室外機駆動電力供給部２３は、室外機遮断部２８を介して電源供給線ＡＣＬ１と、リレーＭＲＭ１１を介して電源供給線ＡＣＬ２とそれぞれ接続されており、当該電源供給線ＡＣＬ１，ＡＣＬ２の間の交流が入力されて室外機駆動部２７へと駆動電圧（例えば直流電圧）を供給する。なお、室外機駆動電力供給部２３（あるいは更に室外機駆動部２７）は、電源供給線ＡＣＬ２と接続され、室外機遮断部２８を介して電源供給線ＡＣＬ１にも接続される内部負荷と把握することができる。   The outdoor unit driving power supply unit 23 is connected to the power supply line ACL1 via the outdoor unit cutoff unit 28 and the power supply line ACL2 via the relay MRM11, and the AC between the power supply lines ACL1 and ACL2 is connected. Is supplied to the outdoor unit drive unit 27 to supply a drive voltage (for example, DC voltage). Note that the outdoor unit drive power supply unit 23 (or further, the outdoor unit drive unit 27) is connected to the power supply line ACL2, and is grasped as an internal load connected to the power supply line ACL1 via the outdoor unit cutoff unit 28. be able to.

室外機駆動部２７は、例えば圧縮機やファン等の空気調和に関する駆動機構であり、室外機駆動電力供給部２３からの駆動電流を受けて動作する。   The outdoor unit driving unit 27 is a driving mechanism related to air conditioning such as a compressor and a fan, and operates by receiving a driving current from the outdoor unit driving power supply unit 23.

伝送電力供給部２４は、抵抗Ｒ２４ａ，Ｒ２４ｂと、ダイオードＤ２４と、ツェナダイオードＺＤ２４と、コンデンサＣ２４とを備えている。   The transmission power supply unit 24 includes resistors R24a and R24b, a diode D24, a Zener diode ZD24, and a capacitor C24.

抵抗Ｒ２４ａは一端が室外機遮断部２８を介して電源供給線ＡＣＬ１と接続されている。ダイオードＤ２４はアノードが抵抗Ｒ２４ａの他端と接続されている。ツェナダイオードＺＤ２４は、カソードがダイオードＤ２４のカソードと、アノードが雑音低減部ＬＣ１を介さずに電源供給線ＡＣＬ２と接続されている。抵抗Ｒ２４ｂ及びコンデンサＣ２４はそれぞれツェナダイオードＺＤ２４と並列に接続されている。   One end of the resistor R24a is connected to the power supply line ACL1 via the outdoor unit cutoff unit 28. The anode of the diode D24 is connected to the other end of the resistor R24a. The Zener diode ZD24 has a cathode connected to the cathode of the diode D24 and an anode connected to the power supply line ACL2 without going through the noise reduction unit LC1. The resistor R24b and the capacitor C24 are each connected in parallel with the Zener diode ZD24.

室外機遮断部２８を介して電源供給線ＡＣＬ１から伝送電力供給部２４に入力された交流がダイオードＤ２４によって整流され、この整流された電流がコンデンサＣ２４を充電する。この電流に起因するコンデンサＣ２２の両端電圧はツェナダイオードＺＤ２４の機能により一定に維持される。当該両端電圧が室外機通信部２５へと伝達される。   The alternating current input from the power supply line ACL1 to the transmission power supply unit 24 via the outdoor unit cutoff unit 28 is rectified by the diode D24, and this rectified current charges the capacitor C24. The voltage across the capacitor C22 caused by this current is kept constant by the function of the Zener diode ZD24. The both-end voltage is transmitted to the outdoor unit communication unit 25.

室外機通信部２５は、ツェナダイオードＺＤ２４及びダイオードＤ２４の間の点Ｐと、伝送線ＣＯＭＬとの間に接続されており、室内機１０（より具体的には室内機通信部１５）と相互に信号を送受信する。なお、伝送電力供給部２４（あるいは更に室外機通信部２５）は、電源供給線ＡＣＬ２と接続され、室外機遮断部２８を介して電源供給線ＡＣＬ１にも接続される内部負荷と把握することができる。   The outdoor unit communication unit 25 is connected between the point P between the Zener diode ZD24 and the diode D24 and the transmission line COML, and is mutually connected to the indoor unit 10 (more specifically, the indoor unit communication unit 15). Send and receive signals. The transmission power supply unit 24 (or the outdoor unit communication unit 25) can be understood as an internal load connected to the power supply line ACL2 and also connected to the power supply line ACL1 via the outdoor unit cutoff unit 28. it can.

室内機通信部１５及び室外機通信部２５の具体的な内部構成の一例をそれぞれ図２及び図３に示す。室内機通信部１５は、ダイオードＤ１５と、抵抗Ｒ１５ａ〜Ｒ１５ｃと、フォトダイオードＰＤ１５と、フォトトランジスタＰＴ１５と、ツェナダイオードＺＤ１５とを備えている。   Examples of specific internal configurations of the indoor unit communication unit 15 and the outdoor unit communication unit 25 are shown in FIGS. 2 and 3, respectively. The indoor unit communication unit 15 includes a diode D15, resistors R15a to R15c, a photodiode PD15, a phototransistor PT15, and a Zener diode ZD15.

ダイオードＤ１５、抵抗Ｒ１５ａ，Ｒ１５ｂ、ツェナダイオードＺＤ１５は、伝送線ＣＯＭＬと電源供給線ＡＣＬ２の間で直列に接続されている。ダイオードＤ１５はアノードが伝送線ＣＯＭＬ側に、カソードが電源供給線ＡＣＬ２側にそれぞれ接続されている。ツェナダイオードＺＤ１５はアノードが電源供給線ＡＣＬ２側に、カソードが伝送線ＣＯＭＬ側にそれぞれ接続されている。   The diode D15, the resistors R15a and R15b, and the Zener diode ZD15 are connected in series between the transmission line COML and the power supply line ACL2. The diode D15 has an anode connected to the transmission line COML side and a cathode connected to the power supply line ACL2 side. The Zener diode ZD15 has an anode connected to the power supply line ACL2 side and a cathode connected to the transmission line COML side.

フォトダイオードＰＤ１５は抵抗Ｒ１５ｂと並列に接続されており、アノードが伝送線ＣＯＭＬ側に、カソードが電源供給線ＡＣＬ２側にそれぞれ接続されている。フォトトランジスタＰＴ１５及びツェナダイオードＺＤ１５は抵抗１５ｃとそれぞれ並列に接続されている。ツェナダイオードＺＤ１５は、フォトトランジスタＰＴ１５に所定の電圧以上の電圧が印加されることを防ぐ。   The photodiode PD15 is connected in parallel with the resistor R15b, and has an anode connected to the transmission line COML side and a cathode connected to the power supply line ACL2 side. The phototransistor PT15 and the Zener diode ZD15 are respectively connected in parallel with the resistor 15c. The Zener diode ZD15 prevents a voltage higher than a predetermined voltage from being applied to the phototransistor PT15.

フォトトランジスタＰＴ１５は、例えば室内機制御部１１が有する発光素子（図示せず）からの光信号を受けて導通し、フォトダイオードＰＤ１５は自身に電流が流れるときに、例えば室内機制御部１１が有する受光素子（図示せず）に光信号を与える。   For example, the phototransistor PT15 is turned on by receiving an optical signal from a light emitting element (not shown) included in the indoor unit control unit 11, and the photodiode PD15 has, for example, the indoor unit control unit 11 when a current flows through the photodiode PD15. An optical signal is given to a light receiving element (not shown).

室外機通信部２５は、ダイオードＤ２５と、抵抗Ｒ２５ａ〜Ｒ２５ｃと、フォトダイオードＰＤ２５と、フォトトランジスタＰＴ２５と、ツェナダイオードＺＤ２５とを備えている。ツェナダイオードＺＤ２５は、フォトトランジスタＰＴ２５に所定の電圧以上の電圧が印加されることを防ぐ。   The outdoor unit communication unit 25 includes a diode D25, resistors R25a to R25c, a photodiode PD25, a phototransistor PT25, and a Zener diode ZD25. The Zener diode ZD25 prevents a voltage higher than a predetermined voltage from being applied to the phototransistor PT25.

ダイオードＤ２５、抵抗Ｒ２５ａ，Ｒ２５ｂ、ツェナダイオードＺＤ２５は、点Ｐと伝送線ＣＯＭＬとの間で直列に接続されている。ダイオードＤ２５はアノードが点Ｐ側に、カソードが伝送線ＣＯＭＬ側にそれぞれ接続されている。   The diode D25, resistors R25a and R25b, and Zener diode ZD25 are connected in series between the point P and the transmission line COML. The diode D25 has an anode connected to the point P side and a cathode connected to the transmission line COML side.

フォトダイオードＰＤ２５は抵抗Ｒ２５ｂと並列に接続されており、アノードが点Ｐ側に、カソードが伝送線ＣＯＭＬ側にそれぞれ接続されている。フォトトランジスタＰＴ２５及びツェナダイオードＺＤ２５は抵抗Ｒ２５ｃとそれぞれ並列に接続されている。   The photodiode PD25 is connected in parallel with the resistor R25b, and the anode is connected to the point P side and the cathode is connected to the transmission line COML side. The phototransistor PT25 and the Zener diode ZD25 are connected in parallel with the resistor R25c.

フォトトランジスタＰＴ２５は、例えば室外機制御部２１が有する発光素子（図示せず）からの光信号を受けて導通し、フォトダイオードＰＤ２５は自身に電流が流れるときに例えば室外機制御部２１が有する受光素子（図示せず）に光信号を与える。   The phototransistor PT25 is turned on by receiving an optical signal from a light emitting element (not shown) included in the outdoor unit control unit 21, for example, and the photodiode PD25 receives light received in the outdoor unit control unit 21, for example, when a current flows through itself. An optical signal is applied to an element (not shown).

通常運転において例えば室内機制御部１１及び室外機制御部２１は、フォトトランジスタＰＴ１５，ＰＴ２５へ光信号を送っていない。よって、フォトトランジスタＰＴ１５，ＰＴ２５はそれぞれ非導通しており、点Ｐから室外機通信部２５、伝送線ＣＯＭＬ、室内機通信部１５（図１も参照）へとオフ電流が流れている。   In normal operation, for example, the indoor unit control unit 11 and the outdoor unit control unit 21 do not send optical signals to the phototransistors PT15 and PT25. Accordingly, the phototransistors PT15 and PT25 are non-conductive, and an off-current flows from the point P to the outdoor unit communication unit 25, the transmission line COML, and the indoor unit communication unit 15 (see also FIG. 1).

そして、例えば室内機１０から室外機２０へと伝送線ＣＯＭＬを介して信号を伝達する際には、例えば室内機制御部１１は光信号を与えてフォトトランジスタＰＴ１５を導通とする。また室外機制御部２１は室内機１０からの信号を確認するために光信号を与えてフォトトランジスタＰＴ２５を導通する。フォトトランジスタＰＴ１５，ＰＴ２５が導通することにより伝送線ＣＯＭＬにオン電流が流れ、フォトダイオードＰＤ２５からの光信号により、室内機１０からの信号の伝達を認識する。室外機２０から室内機１０への信号の伝達も同様にして行われる。   For example, when transmitting a signal from the indoor unit 10 to the outdoor unit 20 via the transmission line COML, for example, the indoor unit control unit 11 provides an optical signal to turn on the phototransistor PT15. In addition, the outdoor unit control unit 21 provides an optical signal to confirm the signal from the indoor unit 10 and conducts the phototransistor PT25. When the phototransistors PT15 and PT25 are turned on, an on-current flows through the transmission line COML, and transmission of a signal from the indoor unit 10 is recognized by an optical signal from the photodiode PD25. Signal transmission from the outdoor unit 20 to the indoor unit 10 is performed in the same manner.

このような構成の空気調和機１において、室外機２０を起動する際の空気調和機１の動作について図４を参照して説明する。図４は運転指令、リレーＭＲ１０，ＭＲＭ１０，ＭＲＭ２０，ＭＲＭ１１、コンデンサＣ２２の両端電圧、コンデンサＣ２４の両端電圧、室外機駆動電力供給部２３が出力する直流電圧、を示している。   In the air conditioner 1 having such a configuration, the operation of the air conditioner 1 when starting the outdoor unit 20 will be described with reference to FIG. FIG. 4 shows the operation command, the relay MR10, MRM10, MRM20, MRM11, the voltage across the capacitor C22, the voltage across the capacitor C24, and the DC voltage output by the outdoor unit driving power supply unit 23.

まず、待機状態においては、リレーＭＲ１０，ＭＲＭ１０，ＭＲＭ１１，ＭＲＭ２０は非導通となっている。   First, in the standby state, relays MR10, MRM10, MRM11, and MRM20 are non-conductive.

そして、ユーザにより運転指令が図示せぬリモコン等により入力されると、室内機制御部１１が当該入力を認識して、リレーＭＲ１０を導通させる（図４中の状態１を参照）。   When the operation command is input by the user using a remote controller (not shown) or the like, the indoor unit control unit 11 recognizes the input and turns on the relay MR10 (see state 1 in FIG. 4).

当該リレーＭＲ１０の導通により、図５に示すように、主電力供給部２６、電源供給線ＡＣＬ１、リレーＭＲ１０、伝送線ＣＯＭＬ、抵抗Ｒ１、ダイオードＤ１、コンデンサＣ２２、ダイオードＤ２２ｂ、電源供給線ＡＣＬ２、雑音低減部ＬＣ１からなる第１回路に電流が流れる。この場合、当該第１回路を流れる電流はダイオードＤ１，Ｄ２２ｂによって整流される。より具体的には、主電力供給部２６が供給する交流のうち図５中の矢印で示す方向の半周期が当該第１回路を流れる。   Due to the conduction of the relay MR10, as shown in FIG. 5, the main power supply unit 26, the power supply line ACL1, the relay MR10, the transmission line COML, the resistor R1, the diode D1, the capacitor C22, the diode D22b, the power supply line ACL2, the noise A current flows through the first circuit including the reduction unit LC1. In this case, the current flowing through the first circuit is rectified by the diodes D1 and D22b. More specifically, out of the alternating current supplied by the main power supply unit 26, a half cycle in the direction indicated by the arrow in FIG. 5 flows through the first circuit.

従って、コンデンサＣ２２には直流電圧が充電される。なお、抵抗Ｒ１は当該電流が流れる際の突電流を防止する。なお、コンデンサＣ２２は、伝送線ＣＯＭＬに接続される抵抗Ｒ１、ダイオードＤ１を有する第２充電経路と接続されて、電源供給線ＡＣＬ２を流れる電流によって充電される、と把握できる。   Accordingly, the capacitor C22 is charged with a DC voltage. The resistor R1 prevents an inrush current when the current flows. It can be understood that the capacitor C22 is connected to the second charging path having the resistor R1 and the diode D1 connected to the transmission line COML, and is charged by the current flowing through the power supply line ACL2.

そして、室外機制御電力供給部２２は、充電されたコンデンサＣ２２の両端電圧をＤＣ−ＤＣコンバータ２２０によって適切な電圧値に変換し、当該電圧を動作電圧として室外機制御部２１へと供給する。   The outdoor unit control power supply unit 22 converts the charged voltage across the capacitor C22 into an appropriate voltage value by the DC-DC converter 220, and supplies the voltage to the outdoor unit control unit 21 as an operating voltage.

当該動作電圧の供給を受けた室外機制御部２１は、リレーＭＲＭ１１，ＭＲＭ２０を導通させる（図４中の状態２を参照）。当該リレーＭＲＭ１１，ＭＲＭ２０の導通により、室外機駆動電力供給部２３にも電力が供給される。より具体的には、主電力供給部２６、電源供給線ＡＣＬ１、雑音低減部ＬＣ１、リレーＭＲＭ２０、抵抗Ｒ２、室外機駆動電力供給部２３、リレーＭＲＭ１１、電源供給線ＡＣＬ２からなる回路に交流が流れる。なお、リレーＭＲＭ１０に先立ってリレーＭＲＭ２０を導通させることにより、抵抗Ｒ２を介して室外機駆動電力供給部２３へ交流を供給でき、以って突電流が流れることを防止している。   The outdoor unit control unit 21 that has received the supply of the operating voltage turns on the relays MRM11 and MRM20 (see state 2 in FIG. 4). Electric power is also supplied to the outdoor unit driving power supply unit 23 by the conduction of the relays MRM11 and MRM20. More specifically, an alternating current flows through a circuit including the main power supply unit 26, the power supply line ACL1, the noise reduction unit LC1, the relay MRM20, the resistor R2, the outdoor unit driving power supply unit 23, the relay MRM11, and the power supply line ACL2. . Note that by making the relay MRM20 conductive prior to the relay MRM10, alternating current can be supplied to the outdoor unit drive power supply unit 23 via the resistor R2, thereby preventing a rush current from flowing.

また、リレーＭＲＭ２０の導通によって、図６に示すように、電源供給線ＡＣＬ１、雑音低減部ＬＣ１、リレーＭＲＭ２０、抵抗Ｒ２、ダイオードＤ２２ａ〜Ｄ２２ｄ、コンデンサＣ２２、電源供給線ＡＣＬ２からなる第２回路にも電流が流れる。当該第２回路の導通によっても、コンデンサＣ２２は充電される。なお、コンデンサＣ２２は、室外機遮断部２８を介して電源供給線ＡＣＬ１に接続されるダイオードＤ２２ａ，Ｄ２２ｃを有する第１充電経路と接続されて、電源供給線ＡＣＬ２を流れる電流によって充電される、と把握できる。   Further, due to the conduction of relay MRM20, as shown in FIG. 6, the second circuit including power supply line ACL1, noise reduction unit LC1, relay MRM20, resistor R2, diodes D22a to D22d, capacitor C22, and power supply line ACL2 is also provided. Current flows. The capacitor C22 is also charged by the conduction of the second circuit. The capacitor C22 is connected to the first charging path having the diodes D22a and D22c connected to the power supply line ACL1 via the outdoor unit cutoff unit 28, and is charged by the current flowing through the power supply line ACL2. I can grasp.

また、リレーＭＲＭ２０の導通によって伝送電力供給部２４にも電流が流れる。より具体的には、所定の半周期において主電力供給部２６からの交流が図７中の太線で示す回路を実線矢印で示す方向に流れ、コンデンサＣ２４に直流電圧が充電される。他の半周期においては２点波線矢印で示す方向に電流が流れる。   Further, a current also flows through the transmission power supply unit 24 due to the conduction of the relay MRM 20. More specifically, the alternating current from the main power supply unit 26 flows in the direction indicated by the solid line arrow in FIG. 7 in the direction indicated by the solid line arrow in a predetermined half cycle, and the DC voltage is charged in the capacitor C24. In the other half cycle, current flows in the direction indicated by the two-dot dashed line arrow.

このときのコンデンサＣ２４の両端電圧の変動は回路抵抗に依存するが、本第１の実施の形態においては次の理由によりわずかに上昇している（図４参照）。具体的には、他の半周期において室外機通信部２５を介して電流が流れている。室外機制御部２１は光信号を室外機通信部２５に与えないので、フォトトランジスタＰＴ２５は非導通である（図３も参照）。よって、当該他の半周期においては、コンデンサＣ２４から放電される電流が、抵抗Ｒ２５ｂ，Ｒ２５ｃ（図３も参照）を通る。   The fluctuation of the voltage across the capacitor C24 at this time depends on the circuit resistance, but in the first embodiment, it slightly increases for the following reason (see FIG. 4). Specifically, current flows through the outdoor unit communication unit 25 in another half cycle. Since the outdoor unit control unit 21 does not give an optical signal to the outdoor unit communication unit 25, the phototransistor PT25 is non-conductive (see also FIG. 3). Therefore, in the other half cycle, the current discharged from the capacitor C24 passes through the resistors R25b and R25c (see also FIG. 3).

Ｒ１５ｃ、Ｒ２５ｃは室外機２０への電源が遮断された時に、コンデンサＣ２２の電荷を放電する為の抵抗であるが、フォトトランジスタＰＴ１５、ＰＴ２５が非導通であるときに伝送線ＣＯＭＬに流れる電流も小さく設定する必要があるので、一般に抵抗値が高い。よって、当該他の半周期において流れる放電電流は、所定の半周期においてコンデンサＣ２２に供給される充電電流に比べて小さく、全体としてコンデンサＣ２４の両端電圧はわずかに上昇する。   R15c and R25c are resistors for discharging the charge of the capacitor C22 when the power supply to the outdoor unit 20 is cut off, but the current flowing through the transmission line COML is small when the phototransistors PT15 and PT25 are non-conductive. Since it is necessary to set, the resistance value is generally high. Therefore, the discharge current flowing in the other half cycle is smaller than the charging current supplied to the capacitor C22 in a predetermined half cycle, and the voltage across the capacitor C24 slightly increases as a whole.

次に、室外機制御部２１はリレーＭＲＭ１０を導通させる。当該リレーＭＲＭ１０の導通により、室外機制御電力供給部２２、室外機駆動電力供給部２３へ供給される交流は抵抗Ｒ２を迂回するので、抵抗Ｒ２による不要な電圧降下を避けることができ、コンデンサＣ２２及び室外機駆動電力供給部２３に所望の直流電圧を充電できる。   Next, the outdoor unit control unit 21 turns on the relay MRM10. Due to the conduction of the relay MRM10, the alternating current supplied to the outdoor unit control power supply unit 22 and the outdoor unit drive power supply unit 23 bypasses the resistor R2. Therefore, an unnecessary voltage drop due to the resistor R2 can be avoided, and the capacitor C22. In addition, the outdoor unit driving power supply unit 23 can be charged with a desired DC voltage.

その後、室外機制御部２１はリレーＭＲＭ２０を遮断する。そして、室内機制御部１１はリレーＭＲ１０を遮断する（図４中の状態３を参照）。   Thereafter, the outdoor unit control unit 21 shuts off the relay MRM20. And the indoor unit control part 11 interrupts | blocks relay MR10 (refer the state 3 in FIG. 4).

当該リレーＭＲ１０の遮断により、他の半周期においてコンデンサＣ２４は放電する経路を失うので、コンデンサＣ２４の両端電圧は所定の値（ツェナダイオードＺＤ２４のツェナー電圧）まで上昇する（図４中の状態３を参照）。   As the relay MR10 is cut off, the capacitor C24 loses the discharge path in the other half cycle, so that the voltage across the capacitor C24 rises to a predetermined value (the Zener voltage of the Zener diode ZD24) (state 3 in FIG. 4). reference).

また当該リレーＭＲ１０の遮断により、伝送線ＣＯＭＬには主電力供給部２６からの交流が伝達されないので、抵抗Ｒ１、ダイオードＤ１を介した第２充電経路によるコンデンサＣ２２の充電は停止する。   Further, since the AC from the main power supply unit 26 is not transmitted to the transmission line COML due to the interruption of the relay MR10, the charging of the capacitor C22 through the second charging path via the resistor R1 and the diode D1 is stopped.

そして、室内機制御部１１、室外機制御部２１は通常運転へと移行する。   And the indoor unit control part 11 and the outdoor unit control part 21 transfer to a normal driving | operation.

なお、ツェナダイオードＺＤ２４によって点Ｐの電位は電源供給線ＡＣＬ２の電位よりも高いので、コンデンサＣ２２の低電位側端の電位は伝送線ＣＯＭＬの電位に比べて低い。これにより、ダイオードＤ１、抵抗Ｒ１を介してコンデンサＣ２２から伝送線ＣＯＭＬへと電流が流れることを防ぐことができ、通常運転における伝送線ＣＯＭＬを介した室内機１０、室外機２０間の通信を阻害しない。なお、室外機通信部２５は伝送線ＣＯＭＬを介して、コンデンサＣ２２の低電位側端の電位以上の電位を信号として室内機１０へ伝達する、と把握することができる。   Since the Zener diode ZD24 causes the potential at the point P to be higher than the potential of the power supply line ACL2, the potential at the low potential side end of the capacitor C22 is lower than the potential of the transmission line COML. As a result, current can be prevented from flowing from the capacitor C22 to the transmission line COML via the diode D1 and the resistor R1, and communication between the indoor unit 10 and the outdoor unit 20 via the transmission line COML during normal operation is obstructed. do not do. Note that the outdoor unit communication unit 25 can grasp that a potential equal to or higher than the potential at the low potential side end of the capacitor C22 is transmitted as a signal to the indoor unit 10 via the transmission line COML.

以上のように、リレーＭＲ１０が導通することにより、コンデンサＣ２２は電源供給線ＡＣＬ１と、伝送線ＣＯＭＬと、抵抗Ｒ１、ダイオードＤ１を有する第２充電経路と、電源供給線ＡＣＬ２とを流れる電流によって充電される。かかる充電により、室外機制御部２１が給電され、その動作が可能となる。そして室外機制御部２１が動作可能となることにより、リレーＭＲＭ２０（若しくはリレーＭＲＭ１０）を導通させることができる。これにより室外機駆動電力供給部２３や伝送電力供給部２４に電源が供給される。しかも、コンデンサＣ２２は、ダイオードＤ２２ａ，Ｄ２２ｃを有する第１充電経路によっても充電されるので、抵抗Ｒ１、ダイオードＤ１を有する第２充電経路をカットすることができる。具体的には、リレーＭＲ１０を非導通にできるので、一旦、ダイオードＤ２２ａ，Ｄ２２ｃを有する第１充電経路による充電が生じた後は、伝送線ＣＯＭＬに充電電流を流す必要が無く、信号伝達のために伝送線ＣＯＭＬを用いることができる。   As described above, when the relay MR10 is turned on, the capacitor C22 is charged by the current flowing through the power supply line ACL1, the transmission line COML, the second charging path including the resistor R1 and the diode D1, and the power supply line ACL2. Is done. By such charging, the outdoor unit control unit 21 is supplied with power and can operate. When the outdoor unit control unit 21 becomes operable, the relay MRM 20 (or the relay MRM 10) can be turned on. As a result, power is supplied to the outdoor unit drive power supply unit 23 and the transmission power supply unit 24. In addition, since the capacitor C22 is also charged by the first charging path having the diodes D22a and D22c, the second charging path having the resistor R1 and the diode D1 can be cut. Specifically, since the relay MR10 can be made non-conductive, once charging has occurred through the first charging path having the diodes D22a and D22c, there is no need to flow a charging current through the transmission line COML, and signal transmission is possible. A transmission line COML can be used.

また、特許文献１（特開２００５−２５７２３８号公報）に記載の態様（背景技術の欄で述べた態様を参照）に比べて、第１スイッチを不要とすることができる。よって第１スイッチに起因する不要なスイッチ損失の発生を防止でき、また回路規模や製造コストを低減することができる。   In addition, the first switch can be omitted as compared with the aspect described in Patent Document 1 (Japanese Patent Laid-Open No. 2005-257238) (see the aspect described in the background art section). Therefore, unnecessary switch loss due to the first switch can be prevented, and the circuit scale and manufacturing cost can be reduced.

なお、本第１の実施の形態においては、室外機制御電力供給部２２はダイオードＤ２２ａ〜Ｄ２２ｄ、コンデンサＣ２２からなる全波整流回路を備えているがこれに限らず、倍電圧整流回路を備えていてもよい。   In the first embodiment, the outdoor unit control power supply unit 22 includes a full-wave rectifier circuit including diodes D22a to D22d and a capacitor C22, but is not limited thereto, and includes a voltage doubler rectifier circuit. May be.

なお、本第１の実施の形態においては、ダイオードＤ１がコンデンサＣ２２の低電位側端に接続されているがこれに限らず、ダイオードＤ１のカソードがコンデンサＣ２２の高電位側端に、アノードが抵抗Ｒ１を介して伝送線ＣＯＭＬに接続されていてもよい。この場合、通常運転において室外機通信部２５は伝送線ＣＯＭＬを介して、コンデンサＣ２２の高電位側端の電位以下の電位を信号として室内機１０へ伝達すればよい。   In the first embodiment, the diode D1 is connected to the low potential end of the capacitor C22. However, the present invention is not limited to this, and the cathode of the diode D1 is connected to the high potential end of the capacitor C22 and the anode is a resistor. It may be connected to the transmission line COML via R1. In this case, during normal operation, the outdoor unit communication unit 25 may transmit a potential equal to or lower than the potential at the high potential side end of the capacitor C22 to the indoor unit 10 through the transmission line COML.

第２の実施の形態．
第２の実施の形態に係る空気調和機の一例の概念的な構成図を図８に示す。第１の実施の形態と比較して、室外機制御電力供給部２２はダイオードＤ２を更に備えている。その他の構成は第１の実施の形態と同一である。また、起動時における室内機制御部１１、室外機制御部２１の動作は第１の実施の形態と同一であるため詳細な説明は省略し、第１の実施の形態と異なる点のみについて詳述する。 Second embodiment.
FIG. 8 shows a conceptual configuration diagram of an example of an air conditioner according to the second embodiment. Compared to the first embodiment, the outdoor unit control power supply unit 22 further includes a diode D2. Other configurations are the same as those of the first embodiment. Further, since the operations of the indoor unit control unit 11 and the outdoor unit control unit 21 at the time of activation are the same as those in the first embodiment, detailed description thereof will be omitted, and only differences from the first embodiment will be described in detail. To do.

ダイオードＤ２はアノードが抵抗Ｒ１とダイオードＤ１との間に、カソードがコンデンサＣ２２の高電位側端にそれぞれ接続されている。ダイオードＤ２は、ダイオードＤ１，Ｄ２２ｂ，Ｄ２２ｄと共に全波整流回路を構成している。   The diode D2 has an anode connected between the resistor R1 and the diode D1, and a cathode connected to the high potential side end of the capacitor C22. The diode D2 constitutes a full-wave rectifier circuit together with the diodes D1, D22b, and D22d.

本第２の実施の形態に係る空気調和機１においては、室内機制御部１１がリレーＭＲ１０を導通させると、主電力供給部２６からの交流が、電源供給線ＡＣＬ１、リレーＭＲ１０、伝送線ＣＯＭＬ、抵抗Ｒ１、ダイオードＤ１，Ｄ２、コンデンサＣ２２、ダイオードＤ２２ｂ，２２ｄ、電源供給線ＡＣＬ２、雑音低減部ＬＣ１からなる回路に電流が流れる。   In the air conditioner 1 according to the second embodiment, when the indoor unit control unit 11 causes the relay MR10 to conduct, the alternating current from the main power supply unit 26 is converted to the power supply line ACL1, the relay MR10, and the transmission line COML. , A current flows through a circuit including the resistor R1, the diodes D1 and D2, the capacitor C22, the diodes D22b and 22d, the power supply line ACL2, and the noise reduction unit LC1.

よって、ダイオードＤ１，Ｄ２，Ｄ２２ｂ，Ｄ２２ｄを介して全波整流してコンデンサＣ２２を充電できる。ひいては、起動時におけるコンデンサＣ２２の充電時間を短縮することができる。   Therefore, full-wave rectification can be performed via the diodes D1, D2, D22b, and D22d to charge the capacitor C22. As a result, the charge time of the capacitor | condenser C22 at the time of starting can be shortened.

第３の実施の形態．
本発明に係る第３の実施の形態の空気調和機の一例の概念的な構成図を図９に示す。第１の実施の形態と比較して構成上の相違点を説明する。 Third embodiment.
The conceptual block diagram of an example of the air conditioner of 3rd Embodiment which concerns on this invention is shown in FIG. Differences in configuration compared to the first embodiment will be described.

室外機２０はコイルＬ１を更に備えている。コイルＬ１は力率を改善するためであり、第１の実施の形態および第２の実施の形態では室外機駆動電力供給部２３に含まれる。室外機遮断部２８はリレーＭＲＭ１０を備えている。室外機制御電力供給部２２は、抵抗Ｒ１と、ダイオードＤ１，Ｄ２２ａ〜Ｄ２２ｄと、コンデンサＣ２２ａ，Ｃ２２ｂと、ＤＣ−ＤＣコンバータ２２０とを備えている。   The outdoor unit 20 further includes a coil L1. The coil L1 is for improving the power factor, and is included in the outdoor unit driving power supply unit 23 in the first embodiment and the second embodiment. The outdoor unit cutoff unit 28 includes a relay MRM10. The outdoor unit control power supply unit 22 includes a resistor R1, diodes D1, D22a to D22d, capacitors C22a and C22b, and a DC-DC converter 220.

コイルＬ１は、電源供給線ＡＣＬ１上であって雑音低減部ＬＣ１とダイオードＤ２２ａのアノード（ダイオードＤ２２ｃのカソード）との間に接続されている。   The coil L1 is on the power supply line ACL1 and is connected between the noise reduction unit LC1 and the anode of the diode D22a (the cathode of the diode D22c).

リレーＭＲＭ１０は電源供給線ＡＣＬ１上であって主電力供給部２６と雑音低減部ＬＣ１との間に接続されている。   Relay MRM10 is on power supply line ACL1 and is connected between main power supply unit 26 and noise reduction unit LC1.

コンデンサＣ２２ａ，Ｃ２２ｂは直列に接続されており、ダイオードＤ２２ａ，Ｄ２２ｃおよびＤ２２ｂ，Ｄ２２ｄの二組はコンデンサＣ２２ａ，Ｃ２２ｂの一組と並列に接続されている。コンデンサＣ２２ａ，Ｃ２２ｂの間は電源供給線ＡＣＬ２が接続されている。ダイオードＤ２２ａ，Ｄ２２ｃ、コンデンサＣ２２ａ，Ｃ２２ｂは倍電圧整流回路を構成している。ダイオードＤ２２ｂのアノードおよびＤ２２ｄのカソードはコンデンサＣ２２ａ，Ｃ２２ｂ間に接続され、各コンデンサＣ２２ａ，Ｃ２２ｂに逆電圧がかかるのを防止する。なお、ダイオードＤ２２ａ，Ｄ２２ｃからなる経路は、リレーＭＲＭ１０を介して電源供給線ＡＣＬ１と接続され、コンデンサＣ２２ａ，Ｃ２２ｂを充電する電流が流れる第１充電経路と把握することができる。   Capacitors C22a and C22b are connected in series, and two sets of diodes D22a and D22c and D22b and D22d are connected in parallel with one set of capacitors C22a and C22b. A power supply line ACL2 is connected between the capacitors C22a and C22b. The diodes D22a and D22c and the capacitors C22a and C22b constitute a voltage doubler rectifier circuit. The anode of the diode D22b and the cathode of the D22d are connected between the capacitors C22a and C22b to prevent reverse voltages from being applied to the capacitors C22a and C22b. The path formed by the diodes D22a and D22c is connected to the power supply line ACL1 via the relay MRM10 and can be understood as a first charging path through which a current for charging the capacitors C22a and C22b flows.

ダイオードＤ１のアノードは、コンデンサＣ２２ａと反対側に位置するコンデンサＣ２２ｂの一端（低電位側端）と接続されている。なお、ダイオードＤ１、抵抗Ｒ１からなる経路は、伝送線ＣＯＭＬと接続され、コンデンサＣ２２ｂを充電する電流が流れる第２充電経路と把握できる。   The anode of the diode D1 is connected to one end (low potential side end) of a capacitor C22b located on the opposite side of the capacitor C22a. The path formed by the diode D1 and the resistor R1 can be grasped as the second charging path that is connected to the transmission line COML and through which the current for charging the capacitor C22b flows.

室外機駆動電力供給部２３はコンデンサＣ２２ａ，Ｃ２２ｂの一組の両端と接続されている。   The outdoor unit driving power supply unit 23 is connected to both ends of a set of capacitors C22a and C22b.

このような構成の空気調和機１において、室外機２０を起動する際の空気調和機の動作について、第１の実施の形態との相違点を説明する。   In the air conditioner 1 having such a configuration, the operation of the air conditioner when starting the outdoor unit 20 will be described with respect to differences from the first embodiment.

まず、室内機制御部１１がリレーＭＲ１０を導通させると、主電力供給部２６、電源供給線ＡＣＬ１、リレーＭＲ１０、伝送線ＣＯＭＬ、抵抗Ｒ１、ダイオードＤ１、コンデンサＣ２２ｂ、電源供給線ＡＣＬ２、雑音低減部ＬＣ１からなる回路に電流が流れる。この回路に流れる電流はダイオードＤ１によって整流されるので、コンデンサＣ２２ｂには直流電圧が充電される。   First, when the indoor unit control unit 11 turns on the relay MR10, the main power supply unit 26, the power supply line ACL1, the relay MR10, the transmission line COML, the resistor R1, the diode D1, the capacitor C22b, the power supply line ACL2, and the noise reduction unit. A current flows through the circuit composed of LC1. Since the current flowing through this circuit is rectified by the diode D1, the capacitor C22b is charged with a DC voltage.

充電されたコンデンサＣ２２ｂの両端電圧はコンデンサＣ２２ａを介してＤＣ−ＤＣコンバータ２２０に入力される。ＤＣ−ＤＣコンバータ２２０は入力された電圧を適切な電圧値に変換し、動作電圧として室外機制御部２１へと出力する。また、充電されたコンデンサＣ２２ｂの両端電圧はコンデンサＣ２２ａを介して室外機駆動電力供給部２３へも供給される。   The charged voltage across the capacitor C22b is input to the DC-DC converter 220 via the capacitor C22a. The DC-DC converter 220 converts the input voltage into an appropriate voltage value, and outputs it to the outdoor unit control unit 21 as an operating voltage. The charged voltage across the capacitor C22b is also supplied to the outdoor unit driving power supply unit 23 via the capacitor C22a.

そして、動作電圧の供給を受けた室外機制御部２１はリレーＭＲＭ１０を導通させる。当該リレーＭＲＭ１０の導通によって、主電力供給部２６、電源供給線ＡＣＬｌ、リレーＭＲＭ１０、雑音低減部ＬＣ１、コイルＬ１、ダイオードＤ２２ａ，Ｄ２２ｃ、コンデンサＣ２２ａ，Ｃ２２ｂ、電源供給線ＡＣＬ２からなる回路にも電流が流れる。よって、コンデンサＣ２２ａ，Ｃ２２ｂが充電される。   And the outdoor unit control part 21 which received supply of the operating voltage makes the relay MRM10 conduct | electrically_connecting. Due to the conduction of the relay MRM10, a current is also supplied to the circuit including the main power supply unit 26, the power supply line ACL1, the relay MRM10, the noise reduction unit LC1, the coil L1, the diodes D22a and D22c, the capacitors C22a and C22b, and the power supply line ACL2. Flowing. Therefore, the capacitors C22a and C22b are charged.

また、当該リレーＭＲＭ１０の導通によって、第１の実施の形態と同様に伝送電力供給部２４へも電流が供給される。   Further, as the relay MRM 10 is turned on, a current is also supplied to the transmission power supply unit 24 as in the first embodiment.

その後、室内機制御部１１はリレーＭＲ１０を非導通とし、室内機制御部１１、室外機制御部２１は通常運転へと移行する。   Thereafter, the indoor unit control unit 11 turns off the relay MR10, and the indoor unit control unit 11 and the outdoor unit control unit 21 shift to normal operation.

本第３の実施の形態に係る空気調和機１においては、室外機駆動電力供給部２３がコンデンサＣ２２ａ，Ｃ２２ｂの一組の両端に接続されている。よって、同じコンデンサＣ２２ａ，Ｃ２２ｂを用いて室外機制御部２１及び室外機駆動電力供給部２３へと電力を供給でき、回路規模や製造コストを低減できる。   In the air conditioner 1 according to the third embodiment, the outdoor unit driving power supply unit 23 is connected to both ends of a set of capacitors C22a and C22b. Therefore, electric power can be supplied to the outdoor unit control unit 21 and the outdoor unit driving power supply unit 23 using the same capacitors C22a and C22b, and the circuit scale and manufacturing cost can be reduced.

なお、第３の実施の形態において、リレーＭＲ１０のみが導通しているときは、コンデンサＣ２２ｂにのみ充電され、コンデンサＣ２２ａには充電されない。この状態で室外機制御部２１がリレーＭＲＭ１０を導通させるので、コンデンサＣ２２ａを充電する為の大きな突入電流が流れる可能性がある。   In the third embodiment, when only the relay MR10 is conducting, only the capacitor C22b is charged, and the capacitor C22a is not charged. In this state, the outdoor unit control unit 21 causes the relay MRM10 to conduct, so that a large inrush current for charging the capacitor C22a may flow.

そこで、本第３の実施の形態においても、図１０に示すように第２の実施の形態と同様にダイオードＤ２を設けてもよい。この場合、リレーＭＲ１０のみが導通しているときでも、ダイオードＤ１，Ｄ２を介した全波倍電圧整流によりコンデンサＣ２２ａ，Ｃ２２ｂを充電できるので、室外機制御部２１がリレーＭＲＭ１０を導通させた際の突入電流の発生を防止できる。   Therefore, also in the third embodiment, a diode D2 may be provided as in the second embodiment, as shown in FIG. In this case, even when only the relay MR10 is conducting, the capacitors C22a and C22b can be charged by full-wave voltage doubler rectification via the diodes D1 and D2, and therefore when the outdoor unit control unit 21 conducts the relay MRM10. Generation of inrush current can be prevented.

なお、本第３の実施の形態においては、室外機制御電力供給部２２はダイオードＤ２２ｂ，Ｄ２２ｄを備えているが，逆電圧がないあるいは問題がない場合は備えなくてもよい。このとき、ダイオードＤ１、Ｄ２の何れか一方を備えていてもよく、両方を備えていてもよい。   In the third embodiment, the outdoor unit control power supply unit 22 includes the diodes D22b and D22d. However, the outdoor unit control power supply unit 22 may be omitted if there is no reverse voltage or no problem. At this time, either one of the diodes D1 and D2 may be provided, or both may be provided.

第１の実施の形態にかかる空気調和機の一例の概念的な構成図である。It is a notional block diagram of an example of the air conditioner concerning 1st Embodiment. 室内機通信部の概念的な内部構成図である。It is a notional internal block diagram of an indoor unit communication unit. 室外機通信部の概念的な内部構成図である。It is a notional internal block diagram of an outdoor unit communication part. 第１の実施の形態にかかる空気調和機を起動する際の動作を説明するための図である。It is a figure for demonstrating the operation | movement at the time of starting the air conditioner concerning 1st Embodiment. 第１の実施の形態にかかる空気調和機の一例の概念的な構成図である。It is a notional block diagram of an example of the air conditioner concerning 1st Embodiment. 第１の実施の形態にかかる空気調和機の一例の概念的な構成図である。It is a notional block diagram of an example of the air conditioner concerning 1st Embodiment. 第１の実施の形態にかかる空気調和機の一例の概念的な構成図である。It is a notional block diagram of an example of the air conditioner concerning 1st Embodiment. 第２の実施の形態にかかる空気調和機の一例の概念的な構成図である。It is a notional block diagram of an example of the air conditioner concerning 2nd Embodiment. 第３の実施の形態にかかる空気調和機の一例の概念的な構成図である。It is a notional block diagram of an example of the air conditioner concerning 3rd Embodiment. 第３の実施の形態にかかる空気調和機の一例の概念的な構成図である。It is a notional block diagram of an example of the air conditioner concerning 3rd Embodiment.

符号の説明Explanation of symbols

１ 空気調和機
１０ 室内機
２０ 室外機
２１ 室外機制御部
２２ 室外機制御電力供給部
ＡＣＬ１，ＡＣＬ２ 電源供給線
ＣＯＭＬ 伝送線
Ｃ２２，Ｃ２２ａ，Ｃ２２ｂ コンデンサ
Ｄ１，Ｄ２ ダイオード
ＭＲ１０，ＭＲＭ１０，ＭＲＭ２０ リレー DESCRIPTION OF SYMBOLS 1 Air conditioner 10 Indoor unit 20 Outdoor unit 21 Outdoor unit control part 22 Outdoor unit control electric power supply part ACL1, ACL2 Power supply line COML Transmission line C22, C22a, C22b Capacitor D1, D2 Diode MR10, MRM10, MRM20 Relay

Claims (6)

交流が供給される第１及び第２電源供給線(ACL1,ACL2)と、
伝送線(COML)と、
前記伝送線と前記第１電源供給線との導通／非導通を制御する第１選択部(MR10)を有する室内機(10)と、
動作電圧を受けて動作する室外機制御部(21)と、
前記室外機制御部の制御によって導通し、当該制御がなければ非導通となる第２選択部(MRM10;MRM20)と、
第２電源供給線と接続され、前記第２選択部を介して前記第１電源供給線にも接続される内部負荷(23；24,25)と、
前記第２選択部を介して前記第１電源供給線に接続される第１充電経路(D22a，D22c)と、前記伝送線に接続される第２充電経路(R1,D1；D2)と、前記第１充電経路及び前記第２充電経路と接続されて、前記第２電源供給線を流れる電流によって充電されるコンデンサ(C22;C22a,C22b)とを含み、当該コンデンサの両端電圧を前記動作電圧として出力する室外制御電力供給部(22)と
を有する室外機(20)と
を備える、空気調和機(1)。 First and second power supply lines (ACL1, ACL2) supplied with alternating current;
Transmission line (COML),
An indoor unit (10) having a first selection unit (MR10) for controlling conduction / non-conduction between the transmission line and the first power supply line;
An outdoor unit controller (21) that operates in response to an operating voltage;
A second selection unit (MRM10; MRM20) that is turned on by the control of the outdoor unit control unit and is turned off if there is no such control;
An internal load (23; 24, 25) connected to the second power supply line and also connected to the first power supply line via the second selector;
A first charging path (D22a, D22c) connected to the first power supply line via the second selection unit; a second charging path (R1, D1; D2) connected to the transmission line; A capacitor (C22; C22a, C22b) connected to the first charging path and the second charging path and charged by a current flowing through the second power supply line, and the voltage across the capacitor as the operating voltage An air conditioner (1) comprising an outdoor unit (20) having an outdoor control power supply unit (22) for outputting. 前記室外機(20)は、
空気調和に関する室外機駆動機構(27)と、
前記コンデンサ(C22;C22a,C22b)の両端電圧が入力されて、前記室外機駆動機構へと駆動電流を供給する室外機駆動電力供給部(23)
を更に備える、請求項１に記載の空気調和機。 The outdoor unit (20)
Outdoor unit drive mechanism (27) for air conditioning,
An outdoor unit drive power supply unit (23) that receives a voltage across the capacitor (C22; C22a, C22b) and supplies a drive current to the outdoor unit drive mechanism
The air conditioner according to claim 1, further comprising: 前記第１充電経路（D22a，D22c）及び前記第２電源供給線（ACL2）は、前記コンデンサ(C22;C22a,C22b)を充電する倍電圧整流回路を構成する、請求項１又は２に記載の空気調和機。   The first charging path (D22a, D22c) and the second power supply line (ACL2) constitute a voltage doubler rectifier circuit that charges the capacitor (C22; C22a, C22b). Air conditioner. 前記内部負荷(24,25)は、前記伝送線(COML)を介して前記コンデンサ(C22;C22a,C22b)の低電位側端の電位以上の電位を信号として前記室内機(10)へ伝達する通信部(25)を有しており、
前記第２充電経路(R1,D1;D2)は、アノードが前記コンデンサの前記低電位側端と、カソードが前記伝送線と接続された整流素子（D1）を有する、請求項１乃至３のいずれか一つに記載の空気調和機。 The internal load (24, 25) transmits, as a signal, a potential equal to or higher than the potential at the low potential side end of the capacitor (C22; C22a, C22b) to the indoor unit (10) via the transmission line (COML). Has a communication department (25),
The second charging path (R1, D1, D2) has a rectifying element (D1) having an anode connected to the low potential side end of the capacitor and a cathode connected to the transmission line. The air conditioner as described in one. 前記内部負荷(24,25)は、前記伝送線(COML)を介して前記コンデンサ(C22;C22a,C22b)の高電位側端の電位以下の電位を信号として前記室内機(10)へ伝達する通信部(25)を有し、
前記第２充電経路(R1,D1;D2)は、カソードが前記コンデンサの高電位側端と、アノードが前記伝送線と接続された整流素子（D2）を有する、請求項１乃至３のいずれか一つに記載の空気調和機。 The internal load (24, 25) transmits, as a signal, a potential equal to or lower than the potential at the high potential side end of the capacitor (C22; C22a, C22b) to the indoor unit (10) via the transmission line (COML). Has a communication part (25),
The second charging path (R1, D1, D2) has a rectifying element (D2) having a cathode connected to a high potential side end of the capacitor and an anode connected to the transmission line. The air conditioner described in one. 前記通信部(25)は、前記伝送線(COML)を介して、前記コンデンサ(C22;C22a,C22b)の低電位側の電位以上且つ前記コンデンサの高電位側の電位以下の電位を信号として前記室内機(10)へ伝達し、
前記第２充電経路(R1,D1;D2)は、アノードが前記コンデンサの低電位側と、カソードが前記伝送線と接続された整流素子（D1）を更に有する、請求項５に記載の空気調和機。 The communication unit (25), through the transmission line (COML), the signal having a potential not lower than the potential on the low potential side of the capacitor (C22; C22a, C22b) and not higher than the potential on the high potential side of the capacitor as a signal. To the indoor unit (10)
The air conditioning according to claim 5, wherein the second charging path (R1, D1, D2) further includes a rectifying element (D1) having an anode connected to the low potential side of the capacitor and a cathode connected to the transmission line. Machine.
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