JPH10246525A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH10246525A JPH10246525A JP9067480A JP6748097A JPH10246525A JP H10246525 A JPH10246525 A JP H10246525A JP 9067480 A JP9067480 A JP 9067480A JP 6748097 A JP6748097 A JP 6748097A JP H10246525 A JPH10246525 A JP H10246525A
- Authority
- JP
- Japan
- Prior art keywords
- expansion valve
- control means
- way valve
- electronic expansion
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
(57)【要約】
【課題】 圧縮機２、四方弁３、室外熱交換器４、電子
膨張弁５及び室内熱交換器６によりヒートポンプ冷凍サ
イクルを構成し、電子膨張弁５の開度を最適状態に制御
する膨張弁制御手段21を備えた空気調和機において、四
方弁３を確実に切換えるとともに四方弁３を切り換える
際に発生する騒音を抑制する。
【解決手段】 四方弁３の切り換えに先立って電子膨張
弁５の開度を予め全開とする膨張弁補助制御手段43を付
設した。
(57) [Problem] To constitute a heat pump refrigeration cycle by a compressor 2, a four-way valve 3, an outdoor heat exchanger 4, an electronic expansion valve 5, and an indoor heat exchanger 6, and to optimize the opening of the electronic expansion valve 5. In the air conditioner provided with the expansion valve control means 21 for controlling the state, the four-way valve 3 is reliably switched, and noise generated when the four-way valve 3 is switched is suppressed. SOLUTION: Prior to switching of a four-way valve 3, expansion valve auxiliary control means 43 for fully opening an electronic expansion valve 5 in advance is provided.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気調和機に関す
る。[0001] The present invention relates to an air conditioner.
【０００２】[0002]
【従来の技術】従来の空気調和機の冷媒回路が図７に示
されている。空気調和機の冷房運転時、圧縮機２から吐
出されたガス冷媒は、実線矢印で示すように、四方弁３
を経て室外熱交換器４に入り、ここでモータ９により駆
動される室外フアン７によって送風される外気に放熱し
て凝縮液化する。2. Description of the Related Art A refrigerant circuit of a conventional air conditioner is shown in FIG. During the cooling operation of the air conditioner, the gas refrigerant discharged from the compressor 2 is supplied to the four-way valve 3 as shown by a solid arrow.
, And enters the outdoor heat exchanger 4, where heat is radiated to the outside air blown by the outdoor fan 7 driven by the motor 9 and condensed and liquefied.
【０００３】この液冷媒は電子膨張弁５を流過する過程
で絞られることにより断熱膨張して室内熱交換器６に入
り、ここでモータ10により駆動される室内フアン８によ
って送風される室内空気を冷却して蒸発気化した後、四
方弁３を経て圧縮機２に吸い込まれる。The liquid refrigerant is adiabatically expanded by being throttled in the process of flowing through the electronic expansion valve 5, enters the indoor heat exchanger 6, where the indoor air blown by the indoor fan 8 driven by the motor 10. After being cooled and evaporated and vaporized, it is sucked into the compressor 2 through the four-way valve 3.
【０００４】暖房運転時には四方弁３が上記と逆に切り
換えられるので、圧縮機２から吐出された冷媒は、破線
矢印で示すように、四方弁３、室内熱交換器６、電子膨
張弁５、室外熱交換器４、四方弁３をこの順に経て圧縮
機２に吸い込まれる。[0004] During the heating operation, the four-way valve 3 is switched in the opposite manner to the above, so that the refrigerant discharged from the compressor 2 receives the four-way valve 3, the indoor heat exchanger 6, the electronic expansion valve 5, The refrigerant is sucked into the compressor 2 through the outdoor heat exchanger 4 and the four-way valve 3 in this order.
【０００５】室温センサ11によって検出された室温とそ
の設定温度との偏差に応じて圧縮機２の運転周波数が決
定され、圧縮機２に供給される電流の周波数をインバー
タ12により変更することによって圧縮機２の回転数、即
ち、容量が変化する。The operating frequency of the compressor 2 is determined in accordance with the deviation between the room temperature detected by the room temperature sensor 11 and the set temperature, and the frequency of the current supplied to the compressor 2 is changed by the inverter 12 to compress the compressor. The rotation speed of the machine 2, that is, the capacity changes.
【０００６】また、圧縮機２から吐出されたガス冷媒の
温度を吐出管温度センサ13によって検出し、これが予め
定められた目標範囲内に入るように電子膨張弁５の開度
がフィードバック制御される。Further, the temperature of the gas refrigerant discharged from the compressor 2 is detected by a discharge pipe temperature sensor 13, and the opening degree of the electronic expansion valve 5 is feedback-controlled so that the temperature falls within a predetermined target range. .
【０００７】暖房運転によって室外熱交換器４に霜が付
着した場合には、四方弁３を切り換えることによってリ
バースサイクルデフロスト運転が実施され、このデフロ
スト運転時、冷媒は冷房運転時と同様実線矢印で示すよ
うに循環する。[0007] When frost adheres to the outdoor heat exchanger 4 during the heating operation, the reverse cycle defrost operation is performed by switching the four-way valve 3, and during this defrost operation, the refrigerant is indicated by solid arrows as in the cooling operation. Circulate as shown.
【０００８】このデフロスト運転によって室外熱交換器
４に付着していた霜が溶融除去されたとき、四方弁３を
切り換えることによって暖房運転に復帰する。When the frost adhering to the outdoor heat exchanger 4 is melted and removed by the defrost operation, the four-way valve 3 is switched to return to the heating operation.
【０００９】[0009]
【発明が解決しようとする課題】上記従来の空気調和機
においては、リバースサイクルデフロスト運転時、四方
弁３を暖房状態から冷房状態に又はこの逆に切り換える
と、四方弁３を経てその片側の高圧ガス冷媒が他側に移
動してその前後の高・低圧がバランスするため、四方弁
３から大きな騒音が発生するという問題があった。In the conventional air conditioner, when the four-way valve 3 is switched from the heating state to the cooling state or vice versa during the reverse cycle defrost operation, the high pressure on one side of the air conditioner is passed through the four-way valve 3. Since the gas refrigerant moves to the other side and the high and low pressures before and after the gas refrigerant are balanced, there is a problem that loud noise is generated from the four-way valve 3.
【００１０】また、空気調和機のサーモ停止を含む運転
停止時、高・低圧をバランスさせるために四方弁３が切
り換えられるが、高・低圧差が残った状態では四方弁３
を確実に切り換えることができない場合があった。When the operation of the air conditioner is stopped including the thermo stop, the four-way valve 3 is switched to balance the high and low pressures.
May not be able to be switched reliably.
【００１１】[0011]
【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、第１の発明の要旨
とするところは、圧縮機、四方弁、室外熱交換器、電子
膨張弁及び室内熱交換器によりヒートポンプ冷凍サイク
ルを構成するとともに上記電子膨張弁の開度を最適状態
に制御する膨張弁制御手段を備えた空気調和機におい
て、上記四方弁の切り換えに先立って上記電子膨張弁の
開度を予め全開とする膨張弁補助制御手段を付設したこ
とを特徴とする空気調和機にある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of the first invention is to provide a compressor, a four-way valve, an outdoor heat exchanger, In an air conditioner comprising an expansion valve and an indoor heat exchanger, comprising a heat pump refrigeration cycle and an expansion valve control means for controlling an opening degree of the electronic expansion valve to an optimum state, prior to switching of the four-way valve, An air conditioner is provided with expansion valve auxiliary control means for fully opening the expansion valve in advance.
【００１２】他の特徴とするところは、上記四方弁の切
換信号がサーモ停止を含む運転停止時の高・低圧バラン
スのための切換信号であることにある。Another feature is that the switching signal for the four-way valve is a switching signal for high / low pressure balance at the time of operation stop including thermo stop.
【００１３】更に他の特徴とするところは、上記四方弁
の切換信号がリバースサイクルデフロストのための切換
信号であることにある。Still another feature is that the four-way valve switching signal is a switching signal for reverse cycle defrost.
【００１４】第２の発明の要旨とするところは、圧縮
機、四方弁、室外熱交換器、電子膨張弁及び室内熱交換
器によりヒートポンプ冷凍サイクルを構成するとともに
上記電子膨張弁の開度を最適状態に制御する膨張弁制御
手段を備えた空気調和機において、上記四方弁を切り換
えてリバースサイクルデフロストを行うための着霜信号
により上記電子膨張弁の開度を所定のデフロスト入り開
度となすとともに除霜信号により上記電子膨張弁の開度
を所定のデフロスト終り開度となす膨張弁補助制御手段
を付設したことを特徴とする空気調和機にある。The gist of the second invention is that a heat pump refrigeration cycle is constituted by a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve and an indoor heat exchanger, and the opening degree of the electronic expansion valve is optimized. In an air conditioner having expansion valve control means for controlling the state, the opening degree of the electronic expansion valve is set to a predetermined defrosting opening degree by a frost signal for switching the four-way valve and performing reverse cycle defrosting. An air conditioner is provided with expansion valve auxiliary control means for setting the opening of the electronic expansion valve to a predetermined defrost end opening in accordance with a defrost signal.
【００１５】[0015]
【発明の実施の形態】本発明の第１の実施形態が図１及
び図２に示され、図１は制御系統図、図２はタイムチャ
ートである。空気調和機の運転中、圧縮機２から吐出さ
れたガス冷媒の温度が吐出管温度センサ13によって検出
されて膨張弁制御手段21に入力される。すると、膨張弁
制御手段21は電子膨張弁５に出力して吐出ガス冷媒温度
が予め定められた目標範囲内に入るようにその開度を制
御することによって最適状態ｆとする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention is shown in FIGS. 1 and 2, FIG. 1 is a control system diagram, and FIG. 2 is a time chart. During the operation of the air conditioner, the temperature of the gas refrigerant discharged from the compressor 2 is detected by the discharge pipe temperature sensor 13 and input to the expansion valve control means 21. Then, the expansion valve control means 21 outputs to the electronic expansion valve 5 and controls the opening thereof so that the temperature of the discharged gas refrigerant falls within a predetermined target range, thereby setting the optimum state f.
【００１６】空気調和機の停止信号、サーモ停止信号等
の停止信号が運転・停止制御手段22に入力されると、運
転・停止制御手段22は、図２に示されるように、直ちに
タイマ23及び圧縮機運転・停止手段24に出力し、これに
よってタイマ23はカウントを開始し、また、圧縮機運転
・停止手段24はインバータ12に出力することによって圧
縮機２を停止する。When a stop signal such as an air conditioner stop signal or a thermo stop signal is input to the operation / stop control means 22, the operation / stop control means 22 immediately starts the timer 23 and the timer 23 as shown in FIG. This is output to the compressor operation / stop means 24, whereby the timer 23 starts counting, and the compressor operation / stop means 24 outputs the signal to the inverter 12 to stop the compressor 2.
【００１７】タイマ23に設定された第１の設定時間T1が
経過したとき、この信号を受けて運転・停止制御手段22
は膨張弁補助制御手段25に出力する。すると、膨張弁補
助制御手段25は開度設定手段26に設定された開度、即
ち、全開する旨を決定し、この決定が膨張弁制御手段21
を経由して電子膨張弁５に出力されてこれを全開ｇとす
る。[0017] When the first setting time set in the timer 23 T 1 has elapsed, the operation-stop control section receives the signal 22
Is output to the expansion valve auxiliary control means 25. Then, the expansion valve auxiliary control means 25 determines the opening degree set in the opening degree setting means 26, that is, the full opening, and this determination is based on the expansion valve control means 21.
And is output to the electronic expansion valve 5 via the valve to make the valve fully open.
【００１８】これによって電子膨張弁５の片側の高圧の
液冷媒が電子膨張弁５を通って他側に移動し、電子膨張
弁５の前後の高・低圧がバランスするが、この際電子膨
張弁５は全開となっているので、これから冷媒の流動音
が発生することはない。As a result, the high-pressure liquid refrigerant on one side of the electronic expansion valve 5 moves to the other side through the electronic expansion valve 5, and the high and low pressures before and after the electronic expansion valve 5 are balanced. 5 is fully opened, so that no flow noise of the refrigerant is generated.
【００１９】タイマ23に設定された第２の設定時間T2が
経過したとき、この信号を受けて運転・停止制御手段22
は膨張弁補助制御手段25及び四方弁切換手段27に出力す
る。これによって膨張弁補助制御手段25は電子膨張弁５
の開度を停止時開度ｋとし、四方弁切換手段27は四方弁
３に出力してこれを切り換える。この際、回路内の高圧
と低圧の差が少なくなっているので、四方弁３を確実に
切り換えることができ、また、四方弁３を切り換えたと
きに発生する騒音を抑制できる。[0019] When the second setting time set in the timer 23 T 2 has elapsed, the operation-stop control section receives the signal 22
Is output to the expansion valve auxiliary control means 25 and the four-way valve switching means 27. As a result, the expansion valve auxiliary control means 25 sets the electronic expansion valve 5
Is set as the stop-time opening k, and the four-way valve switching means 27 outputs the same to the four-way valve 3 to switch it. At this time, since the difference between the high pressure and the low pressure in the circuit is reduced, the four-way valve 3 can be reliably switched, and the noise generated when the four-way valve 3 is switched can be suppressed.
【００２０】本発明の第２の実施形態が図３及び図４に
示され、図３は制御系統図、図４はタイムチャートであ
る。暖房運転時、室外熱交換器４又はその近傍の液管に
取り付けられた霜センサ14によって検出された温度が所
定値以下に低下したとき、即ち、室外熱交換器４に霜が
付着したとき、この霜センサ14からの着霜信号がデフロ
スト制御手段30に入力される。FIGS. 3 and 4 show a second embodiment of the present invention. FIG. 3 is a control system diagram, and FIG. 4 is a time chart. During the heating operation, when the temperature detected by the frost sensor 14 attached to the outdoor heat exchanger 4 or a liquid pipe in the vicinity of the outdoor heat exchanger 4 falls below a predetermined value, that is, when frost adheres to the outdoor heat exchanger 4, The frost signal from the frost sensor 14 is input to the defrost control means 30.
【００２１】すると、このデフロスト制御手段30は直ち
にタイマ31及び膨張弁補助制御手段32に出力し、これに
よってタイマ31はカウントを開始する。また、膨張弁補
助制御手段32は開度設定手段33に設定された開度、即
ち、全開にする旨を決定し、この決定は膨張弁制御手段
21を経由して電子膨張弁５に出力されてその開度は全開
ｇとなる。Then, the defrost control means 30 immediately outputs to the timer 31 and the expansion valve auxiliary control means 32, whereby the timer 31 starts counting. The expansion valve auxiliary control means 32 determines the opening degree set in the opening degree setting means 33, that is, determines that the opening is to be fully opened.
It is output to the electronic expansion valve 5 via 21 and its opening degree becomes full open g.
【００２２】タイマ31に設定された第１の設定時間T3が
経過したとき、この信号を受けてデフロスト制御手段30
は四方弁切換手段27に出力し、四方弁切換手段27は四方
弁３に出力してこれをON( 冷房）側に切り換える。これ
と同時にデフロスト制御手段30は膨張弁補助制御手段32
に出力し、膨張弁補助制御手段32は電子膨張弁５の開度
を所定のデフロスト開度ｅにする旨を決定し、この決定
は膨張弁制御手段21を経由して電子膨張弁５に出力され
てその開度はｅとなる。これによってリバースサイクル
デフロスト運転が実施され、冷媒は冷房時と同様に循環
する。[0022] When the first set time T 3 set in the timer 31 has elapsed, the defrost control means 30 receives this signal
Is output to the four-way valve switching means 27, and the four-way valve switching means 27 outputs to the four-way valve 3 to switch it to the ON (cooling) side. At the same time, the defrost control means 30
The expansion valve auxiliary control means 32 determines that the opening of the electronic expansion valve 5 is set to a predetermined defrost opening e, and this determination is output to the electronic expansion valve 5 via the expansion valve control means 21. Then, the opening degree becomes e. As a result, the reverse cycle defrost operation is performed, and the refrigerant circulates in the same manner as in cooling.
【００２３】霜センサ14からの霜が溶融除去された旨の
信号、即ち、除霜信号がデフロスト制御手段32に入力さ
れると、デフロスト制御手段32はタイマ31及び膨張弁補
助制御手段32に出力し、これによってタイマ31はカウン
トを開始し電子膨張弁５の開度は全開ｇとされる。そし
て、タイマ31に設定された第２の設定時間T4が経過した
とき、四方弁３はOFF(暖房) 側に切り換えられると同時
に電子張弁５の開度は最適状態ｆとされて暖房運転に復
帰する。When a signal indicating that the frost has been melted and removed from the frost sensor 14, that is, a defrost signal is input to the defrost control means 32, the defrost control means 32 outputs to the timer 31 and the expansion valve auxiliary control means 32. As a result, the timer 31 starts counting and the opening of the electronic expansion valve 5 is set to the full open g. Then, when the second set time T 4 set in the timer 31 has passed, heating operation the four-way valve 3 is turned OFF opening of the electronic Zhang valve 5 at the same time is switched to the (heating) side-optimal f Return to.
【００２４】かくして、着霜信号及び除霜信号が入力さ
れたとき、電子膨張弁５が全開ｇとされ、回路内の低圧
と高圧がバランスした後に四方弁３が切り換えられるの
で、四方弁３を確実に切り換えることができるとともに
四方弁３から発生する騒音を抑制できる。Thus, when the frosting signal and the defrosting signal are input, the electronic expansion valve 5 is fully opened, and the four-way valve 3 is switched after the low pressure and the high pressure in the circuit are balanced. Switching can be performed reliably, and noise generated from the four-way valve 3 can be suppressed.
【００２５】本発明の第３の実施形態が図５及び図６に
示され、図５は制御系統図、図６はタイムチャートであ
る。暖房運転時、霜センサ14からの着霜信号がデフロス
ト制御手段40に入力されると、デフロスト制御手段40は
タイマ41に出力してカウントを開始させると同時に圧縮
機回転数制御手段42及び膨張弁補助制御手段43に出力す
る。FIGS. 5 and 6 show a third embodiment of the present invention. FIG. 5 is a control system diagram, and FIG. 6 is a time chart. During the heating operation, when a frost signal from the frost sensor 14 is input to the defrost control means 40, the defrost control means 40 outputs the same to the timer 41 to start counting, and at the same time the compressor speed control means 42 and the expansion valve Output to the auxiliary control means 43.
【００２６】すると、圧縮機回転数制御手段42はインバ
ータ12に出力して圧縮機２の回転数を暖房負荷に対応す
る回転数Ｆから零とする。また、膨張弁補助制御手段43
は入り開度設定手段44から入力されたデフロスト入り開
度ｅ( 中間開度近傍) とする旨を決定し、この決定は膨
張弁制御手段21を経由して電子膨張弁５に出力されて電
子膨張弁５の開度はｅとなる。Then, the compressor speed control means 42 outputs to the inverter 12 to reduce the speed of the compressor 2 from the speed F corresponding to the heating load to zero. The expansion valve auxiliary control means 43
Is determined to be the defrosting opening e (near the intermediate opening) input from the opening opening setting means 44, and this determination is output to the electronic expansion valve 5 via the expansion valve control means 21 and The opening of the expansion valve 5 is e.
【００２７】かくして、入り運転が開始され、この入り
運転中圧縮機２が停止しているので電子膨張弁５の片側
の高圧液冷媒が電子膨張弁５を通って低圧側に移動する
ことによって回路内の高圧と低圧とが迅速にバランスす
る。この際電子膨張弁５の開度はデフロスト入り開度ｅ
とされているので、電子膨張弁５から冷媒流動音が発生
することはない。Thus, the on-coming operation is started, and the compressor 2 is stopped during the on-coming operation, so that the high-pressure liquid refrigerant on one side of the electronic expansion valve 5 moves to the low-pressure side through the electronic expansion valve 5 to thereby make the circuit. The high and low pressures in the balance quickly. At this time, the opening degree of the electronic expansion valve 5 is the opening degree e with defrost.
Therefore, no refrigerant flow noise is generated from the electronic expansion valve 5.
【００２８】タイマ41に設定された第１の設定時間T5が
経過したとき、この信号を受けてデフロスト制御手段40
は圧縮機回転数制御手段42及び四方弁切換手段27に出力
する。すると、圧縮機回転数制御手段42はインバータ12
に出力して圧縮機２の回転数を回転数設定手段45に設定
された回転数Ｘに上昇させる。[0028] When the first set time T 5 which is set in the timer 41 has elapsed, the defrost control means 40 receives this signal
Is output to the compressor speed control means 42 and the four-way valve switching means 27. Then, the compressor rotation speed control means 42
And the rotation speed of the compressor 2 is increased to the rotation speed X set by the rotation speed setting means 45.
【００２９】また、四方弁切換手段27は四方弁３に出力
してこれをON( 冷房) 側に切り換える。この際回路内の
高圧と低圧がバランスしているので、四方弁３を確実に
切り換えることができ、また、四方弁３から騒音が発生
することもない。これによってリバースサイクルデフロ
スト運転が開始され、冷媒は冷房運転と同様に循環し、
圧縮機２は高速の回転数Ｘで回転するので、室外熱交換
器４に付着している霜を効果的に溶融しうる。。The four-way valve switching means 27 outputs the signal to the four-way valve 3 and switches it to the ON (cooling) side. At this time, since the high pressure and the low pressure in the circuit are balanced, the four-way valve 3 can be reliably switched, and no noise is generated from the four-way valve 3. Thereby, the reverse cycle defrost operation is started, and the refrigerant circulates similarly to the cooling operation,
Since the compressor 2 rotates at a high rotation speed X, the frost adhering to the outdoor heat exchanger 4 can be effectively melted. .
【００３０】このデフロスト運転によって室外熱交換器
４に付着していた霜が溶融除去され、これを検知した霜
センサ14からの除霜信号がデフロスト制御手段40に入力
されると、デフロスト制御手段40はタイマ41に出力して
カウントを開始させると同時に圧縮機回転数制御手段42
及び膨張弁補助制御手段43に出力する。By the defrosting operation, the frost adhering to the outdoor heat exchanger 4 is melted and removed. When a defrosting signal from the frost sensor 14 which detects this is input to the defrost control means 40, the defrost control means 40 Is output to the timer 41 to start counting, and at the same time,
And to the expansion valve auxiliary control means 43.
【００３１】すると、圧縮機回転数制御手段42はインバ
ータ12に出力して圧縮機２の回転数を零とする。また、
膨張弁補助制御手段43は終り開度設定手段47から入力さ
れたデフロスト終り開度ｊ( 全開近傍) とする旨を決定
し、この決定は膨張弁制御手段21を経由して電子膨張弁
５に出力されて電子膨張弁５の開度は終り開度ｊとな
る。Then, the compressor speed control means 42 outputs to the inverter 12 to make the speed of the compressor 2 zero. Also,
The expansion valve auxiliary control means 43 determines that the defrost end opening degree j (near full open) input from the end opening degree setting means 47 is inputted to the electronic expansion valve 5 via the expansion valve control means 21. The output is output, and the opening of the electronic expansion valve 5 becomes the end opening j.
【００３２】かくして、終り運転が開始され、この終り
運転中圧縮機２が停止しているので、電子膨張弁５を通
って冷媒が移動することにより回路内の高圧と低圧を迅
速にバランスさせることができる。この際電子膨張弁５
はデフロスト終り開度となっているので電子膨張弁５か
ら冷媒流動音が発生することはない。Thus, since the end operation is started and the compressor 2 is stopped during the end operation, the refrigerant moves through the electronic expansion valve 5 to quickly balance the high pressure and the low pressure in the circuit. Can be. At this time, the electronic expansion valve 5
Has the opening degree at the end of defrost, so that no refrigerant flow noise is generated from the electronic expansion valve 5.
【００３３】タイマ41に設定された第２の設定時間T6が
経過したとき、この信号を受けると、デフロスト制御手
段40は圧縮機回転数制御手段42及び膨張弁補助制御手段
43及び四方弁切換手段27に出力する。すると、圧縮機回
転数制御手段42はインバータ12に出力してその回転数を
暖房負荷に対応する回転数Ｆに上昇させる。When this signal is received when the second set time T 6 set in the timer 41 has elapsed, the defrost control means 40 sets the compressor speed control means 42 and the expansion valve auxiliary control means.
43 and the four-way valve switching means 27. Then, the compressor rotation speed control means 42 outputs to the inverter 12 to increase the rotation speed to the rotation speed F corresponding to the heating load.
【００３４】そして、膨張弁補助制御手段43はその制御
を停止し、膨張弁制御手段21が電子膨張弁５に出力する
ことにより電子膨張弁５の開度は最適状態ｆとなる。ま
た、四方弁切換手段27は四方弁３に出力してこれをOFF
(暖房側) に切り換える。これによって空気調和機は暖
房運転に復帰する。この際回路内の高圧と低圧がバラン
スしているので、四方弁３を確実に切り換えることがで
きるとともに四方弁３から騒音が発生することもない。Then, the expansion valve auxiliary control means 43 stops the control, and the expansion valve control means 21 outputs to the electronic expansion valve 5, whereby the opening degree of the electronic expansion valve 5 becomes the optimum state f. Also, the four-way valve switching means 27 outputs to the four-way valve 3 and turns it off.
(Heating side). Thereby, the air conditioner returns to the heating operation. At this time, since the high pressure and the low pressure in the circuit are balanced, the four-way valve 3 can be reliably switched, and no noise is generated from the four-way valve 3.
【００３５】上記第２及び第３の実施形態においては、
霜センサ14から着霜信号又は除霜信号を出力している
が、リバースサイクルデフロスト運転を周期的に、か
つ、所定時間だけ実施することができ、この場合にはデ
フロスト運転終了後の暖房運転時間をカウントするタイ
マから着霜信号を出力させることができ、また、デフロ
スト運転時間をカウントするタイマから除霜信号を出力
させることができる。In the second and third embodiments,
Although the frost sensor 14 outputs the frost signal or the defrost signal from the frost sensor 14, the reverse cycle defrost operation can be performed periodically and for a predetermined time, and in this case, the heating operation time after the end of the defrost operation The defrost signal can be output from a timer that counts the defrosting time, and the defrost signal can be output from a timer that counts the defrost operation time.
【００３6 】[0036]
【発明の効果】請求項１記載の第１の発明においては、
サーモ停止を含む運転停止時又はリバースサイクルデフ
ロストのために四方弁を切り換える場合、四方弁の切り
換えに先立って電子膨張弁の開度を予め全開としてこの
電子膨張弁を通って冷媒を移動させることにより回路内
の高圧と低圧をバランスさせることができるので、安価
な四方弁であってもこれを確実に切り換えることができ
るとともに四方弁から発生する騒音を低減しうる。According to the first aspect of the present invention,
When switching the four-way valve at the time of operation stop including thermostat stop or for reverse cycle defrost, by opening the electronic expansion valve fully beforehand before switching of the four-way valve and moving the refrigerant through this electronic expansion valve, Since the high pressure and the low pressure in the circuit can be balanced, even an inexpensive four-way valve can be switched reliably and noise generated from the four-way valve can be reduced.
【００３６】請求項４記載の第２の発明においては、四
方弁を切り換えてリバースサイクルデフロストを行うた
めの着霜信号により電子膨張弁の開度を所定のデフロス
ト入り開度となすとともに除霜信号により電子膨張弁の
開度を所定のデフロスト終り開度となすので、第１の発
明と同様の効果を奏することができるのみならず電子膨
張弁から発生する冷媒流動音を抑制できる。In the second aspect of the present invention, the opening degree of the electronic expansion valve is set to a predetermined defrosting opening degree by the frosting signal for performing the reverse cycle defrosting by switching the four-way valve and the defrosting signal. As a result, the opening degree of the electronic expansion valve is set to the predetermined opening degree at the end of defrost, so that not only the same effect as in the first aspect of the invention but also the refrigerant flow noise generated from the electronic expansion valve can be suppressed.
【図１】本発明の第１の実施形態を示す制御系統図であ
る。FIG. 1 is a control system diagram showing a first embodiment of the present invention.
【図２】第１の実施形態のタイムチャートである。FIG. 2 is a time chart of the first embodiment.
【図３】本発明の第２の実施形態を示す制御系統図であ
る。FIG. 3 is a control system diagram showing a second embodiment of the present invention.
【図４】第２の実施形態のタイムチャートである。FIG. 4 is a time chart of the second embodiment.
【図５】本発明の第３の実施形態を示す制御系統図であ
る。FIG. 5 is a control system diagram showing a third embodiment of the present invention.
【図６】第３の実施形態のタイムチャートである。FIG. 6 is a time chart of the third embodiment.
【図７】従来の空気調和機の冷媒回路図である。FIG. 7 is a refrigerant circuit diagram of a conventional air conditioner.
２ 圧縮機 ３ 四方弁 ４ 室外熱交換器 ５ 電子膨張弁 ６ 室内熱交換器 2 Compressor 3 Four-way valve 4 Outdoor heat exchanger 5 Electronic expansion valve 6 Indoor heat exchanger
Claims (4)
張弁及び室内熱交換器によりヒートポンプ冷凍サイクル
を構成するとともに上記電子膨張弁の開度を最適状態に
制御する膨張弁制御手段を備えた空気調和機において、 上記四方弁の切り換えに先立って上記電子膨張弁の開度
を予め全開とする膨張弁補助制御手段を付設したことを
特徴とする空気調和機。1. A heat pump refrigeration cycle comprising a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve, and an indoor heat exchanger, and expansion valve control means for controlling an opening of the electronic expansion valve to an optimum state. An air conditioner provided with expansion valve auxiliary control means for fully opening an opening of the electronic expansion valve in advance before switching the four-way valve.
む運転停止時の高・低圧バランスのための切換信号であ
ることを特徴とする請求項１記載の空気調和機。2. The air conditioner according to claim 1, wherein the switching signal of the four-way valve is a switching signal for high / low pressure balance at the time of operation stop including thermo stop.
ルデフロストのための切換信号であることを特徴とする
請求項１記載の空気調和機。3. The air conditioner according to claim 1, wherein the switching signal for the four-way valve is a switching signal for reverse cycle defrost.
張弁及び室内熱交換器によりヒートポンプ冷凍サイクル
を構成するとともに上記電子膨張弁の開度を最適状態に
制御する膨張弁制御手段を備えた空気調和機において、 上記四方弁を切り換えてリバースサイクルデフロストを
行うための着霜信号により上記電子膨張弁の開度を所定
のデフロスト入り開度となすとともに除霜信号により上
記電子膨張弁の開度を所定のデフロスト終り開度となす
膨張弁補助制御手段を付設したことを特徴とする空気調
和機。4. A heat pump refrigeration cycle comprising a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve and an indoor heat exchanger, and expansion valve control means for controlling an opening of the electronic expansion valve to an optimum state. In the air conditioner provided, the opening degree of the electronic expansion valve is set to a predetermined defrosting opening degree by a frosting signal for performing the reverse cycle defrost by switching the four-way valve, and the electronic expansion valve is opened by the defrosting signal. An air conditioner comprising an expansion valve auxiliary control means for setting an opening degree to a predetermined defrost end opening degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06748097A JP3764551B2 (en) | 1997-03-06 | 1997-03-06 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06748097A JP3764551B2 (en) | 1997-03-06 | 1997-03-06 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10246525A true JPH10246525A (en) | 1998-09-14 |
| JP3764551B2 JP3764551B2 (en) | 2006-04-12 |
Family
ID=13346188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06748097A Expired - Lifetime JP3764551B2 (en) | 1997-03-06 | 1997-03-06 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3764551B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008025919A (en) * | 2006-07-21 | 2008-02-07 | Sanyo Electric Co Ltd | Air conditioner |
| JP2012239289A (en) * | 2011-05-11 | 2012-12-06 | Mitsubishi Electric Corp | Control device for air conditioner |
| JP2014098551A (en) * | 2014-02-28 | 2014-05-29 | Daikin Ind Ltd | Heat pump system |
| US8984901B2 (en) | 2009-02-24 | 2015-03-24 | Daikin Industries, Ltd. | Heat pump system |
| WO2016117113A1 (en) * | 2015-01-23 | 2016-07-28 | 三菱電機株式会社 | Air conditioner |
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| CN116045540A (en) * | 2022-12-26 | 2023-05-02 | 珠海格力电器股份有限公司 | Refrigerating system, refrigerating system control method and air conditioner |
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|---|---|---|---|---|
| JP2008025919A (en) * | 2006-07-21 | 2008-02-07 | Sanyo Electric Co Ltd | Air conditioner |
| US8984901B2 (en) | 2009-02-24 | 2015-03-24 | Daikin Industries, Ltd. | Heat pump system |
| JP2012239289A (en) * | 2011-05-11 | 2012-12-06 | Mitsubishi Electric Corp | Control device for air conditioner |
| JP2014098551A (en) * | 2014-02-28 | 2014-05-29 | Daikin Ind Ltd | Heat pump system |
| US20170336115A1 (en) * | 2015-01-23 | 2017-11-23 | Mitsubishi Electric Corporation | Air-conditioning apparatus |
| US10753658B2 (en) | 2015-01-23 | 2020-08-25 | Mitsubishi Electric Corporation | Air-conditioning apparatus |
| JPWO2016117113A1 (en) * | 2015-01-23 | 2017-04-27 | 三菱電機株式会社 | Air conditioner |
| CN107110551A (en) * | 2015-01-23 | 2017-08-29 | 三菱电机株式会社 | Air conditioner |
| WO2016117113A1 (en) * | 2015-01-23 | 2016-07-28 | 三菱電機株式会社 | Air conditioner |
| CN107110551B (en) * | 2015-01-23 | 2019-08-16 | 三菱电机株式会社 | Air conditioner |
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| WO2018029872A1 (en) * | 2016-08-12 | 2018-02-15 | シャープ株式会社 | Air conditioner |
| CN109564036A (en) * | 2016-08-12 | 2019-04-02 | 夏普株式会社 | air conditioner |
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| JP2019082316A (en) * | 2017-10-31 | 2019-05-30 | ダイキン工業株式会社 | Refrigerant cycle device |
| WO2020087903A1 (en) * | 2018-10-31 | 2020-05-07 | 广东美芝精密制造有限公司 | Air conditioner and control method for air conditioner |
| CN112923521A (en) * | 2021-02-05 | 2021-06-08 | 海信（山东）空调有限公司 | Air conditioner and control method |
| CN116045540A (en) * | 2022-12-26 | 2023-05-02 | 珠海格力电器股份有限公司 | Refrigerating system, refrigerating system control method and air conditioner |
| CN116878135A (en) * | 2023-07-05 | 2023-10-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Four-way valve reversing method, four-way valve reversing control device and air conditioner |
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