JPS62134464A - Controller for air conditioner - Google Patents
Controller for air conditionerInfo
- Publication number
- JPS62134464A JPS62134464A JP60274451A JP27445185A JPS62134464A JP S62134464 A JPS62134464 A JP S62134464A JP 60274451 A JP60274451 A JP 60274451A JP 27445185 A JP27445185 A JP 27445185A JP S62134464 A JPS62134464 A JP S62134464A
- Authority
- JP
- Japan
- Prior art keywords
- defrosting
- refrigerant
- air conditioner
- valve
- control device
- 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.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、ヒートポンプ式の冷媒回路を有する空気調
和機の制御装置、特に自動的に除霜運転を行う空気調和
機の制御装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control device for an air conditioner having a heat pump type refrigerant circuit, and particularly to a control device for an air conditioner that automatically performs defrosting operation. be.
第７図は、１９８５年三菱電機株式会社発行の「冷熱ハ
ンドブック」の第９１４頁に記載されている従来の空気
調和機の制御装置を示す図である。FIG. 7 is a diagram showing a conventional air conditioner control device described on page 914 of "Cooling and Heat Handbook" published by Mitsubishi Electric Corporation in 1985.
これはヒートポンプ式の冷凍サイクル？有した分離形空
気調和機の冷媒回路を示すもので、図において、１，２
はそれぞれ分離形空気ｔｐ和機の室外機及び室内機、３
は圧縮機、４は冷媒の流れを切り換えて冷房、暖房の冷
凍サイクルの切換えを行う四方弁、５は室外側熱交換器
、６は冷凍サイクルにおける減圧器としての毛細管、７
は分配管、８（・ま室内側熱交換器、９は上記四方弁４
の下流側に接続されたアキュムレータ、１０はアキュム
レータ９と圧縮機３の間に介装された受液器、１）は暖
房運転時に冷媒の高圧圧力側と低圧圧力側全バイパスす
るために設けられた圧力調整弁で、毛細管６をバイパス
するように接続されている。１２ないし２０はそれぞれ
上述した冷媒回路の各構成部品全連結している冷ρ（配
管である。Is this a heat pump refrigeration cycle? This figure shows the refrigerant circuit of a separate air conditioner with
3 are the outdoor unit and indoor unit of the separate air TP unit, respectively.
is a compressor, 4 is a four-way valve that switches the flow of refrigerant to switch between cooling and heating refrigeration cycles, 5 is an outdoor heat exchanger, 6 is a capillary tube as a pressure reducer in the refrigeration cycle, 7
is the distribution pipe, 8 is the indoor heat exchanger, and 9 is the four-way valve 4 above.
10 is a liquid receiver interposed between the accumulator 9 and the compressor 3, and 1) is provided for completely bypassing the high pressure side and low pressure side of the refrigerant during heating operation. The capillary tube 6 is connected to bypass the capillary tube 6. Reference numerals 12 to 20 are cold pipes that connect all the components of the refrigerant circuit described above.
次に動作について説明する。暖房運転時は、四方弁４才
暖房サイクルに切換操作する。これにより図の点線矢印
で示すように、圧縮機３から吐出されたガス冷媒は冷媒
配管１２及び四方弁４を経て冷媒配管１７を流れ、室内
側熱交換器８に入って凝縮され、ここで液冷媒となる。Next, the operation will be explained. During heating operation, switch to the four-way valve 4-year heating cycle. As a result, as shown by the dotted arrow in the figure, the gas refrigerant discharged from the compressor 3 passes through the refrigerant pipe 12 and the four-way valve 4, flows through the refrigerant pipe 17, enters the indoor heat exchanger 8, and is condensed here. It becomes a liquid refrigerant.
そして、との液冷姪は冷媒配管１６？経て分配管７を通
り、ここで果柄されて冷媒配雀１５Ｗｒ流れる。この冷
媒配管１５を流れて来た液冷媒は、毛細管６にて減圧さ
れて液あるいは二相の冷媒となり、冷媒配管１４を流れ
室外イ則熱交換器５に入る。又、上記毛細管６に流入す
る前の冷媒圧力が圧力調整弁１）の許容圧力より高い場
合は、上記圧力δ４整弁１）が作動して冷媒が上記毛細
管６をバイパスする。And the liquid cooling niece is refrigerant piping 16? After that, it passes through the distribution pipe 7, where it is separated and flows with 15Wr of refrigerant. The liquid refrigerant flowing through the refrigerant pipe 15 is depressurized in the capillary tube 6 to become a liquid or two-phase refrigerant, which flows through the refrigerant pipe 14 and enters the outdoor law heat exchanger 5 . Further, when the refrigerant pressure before flowing into the capillary tube 6 is higher than the allowable pressure of the pressure regulating valve 1), the pressure δ4 regulating valve 1) is operated and the refrigerant bypasses the capillary tube 6.
更に、室外側熱交換器５に流入した冷媒は蒸発し、冷媒
配管１４及び四方弁４全通って冷媒配管１８を流れ、ア
キュムレータ９へ流れ込む。このアキュムレータ９を出
たガス冷媒は、冷媒管１９．受液器１０．冷媒配管２０
を通り、再び圧縮機３に吸入されて、一つの冷凍サイク
ルが終了する。Further, the refrigerant that has flowed into the outdoor heat exchanger 5 evaporates, passes through the refrigerant pipe 14 and the four-way valve 4, flows through the refrigerant pipe 18, and flows into the accumulator 9. The gas refrigerant leaving the accumulator 9 is transferred to the refrigerant pipe 19. Receiver 10. Refrigerant piping 20
, and is sucked into the compressor 3 again, completing one refrigeration cycle.
又、冷房運転時は、四方弁４を冷房サイクルに切換操作
する。これによって図の実線矢印で示す方向に冷媒が流
れ、上記暖房運転時とは逆の流れで一つの冷凍サイクル
が形成される。Also, during cooling operation, the four-way valve 4 is switched to the cooling cycle. As a result, the refrigerant flows in the direction shown by the solid arrow in the figure, and one refrigeration cycle is formed with a flow opposite to that during the heating operation.
ここで、暖房運転時に室外惧ｉｊ熱交換器５に付着した
霜を除去する場合は、一旦暖房運転を停止して冷房サイ
クルに四方弁４を切り換え、一時的に冷房運転全行う。Here, when removing frost adhering to the outdoor heat exchanger 5 during the heating operation, the heating operation is temporarily stopped, the four-way valve 4 is switched to the cooling cycle, and the entire cooling operation is temporarily performed.
これで、除節運転が行われることになり、上記熱交換器
５に付着した霜が取り除かれる。As a result, the moderation operation is performed, and the frost attached to the heat exchanger 5 is removed.
従来の空気調和機の制御装置は以上のように構成されて
おり、暖房運転時に霜取動作を行う場合は、Ｎ １６
Ｍにかかわらず四方弁４を切り換えて冷房サイクルにし
なければならず、このため室内ファンを停止して冷風が
室内へ吹き出さないようにすることが必要となり、又一
時に暖房運転を停止するので室温が大きく低下し、快適
性を損うなどの問題点があった。The conventional air conditioner control device is configured as described above, and when defrosting operation is performed during heating operation, N16
Regardless of M, the four-way valve 4 must be switched to the cooling cycle, which requires stopping the indoor fan to prevent cold air from blowing into the room, and also temporarily stopping the heating operation. There were problems such as a significant drop in room temperature, impairing comfort.
この発明は、このような問題点全解消するためになされ
たもので、暖房運転時に霜取動作を行う場合、尤霜量が
多い時Ｖこのみ冷房サイクルに切換えて除１５に行い、
室温の低下を抑制して快適性を損うことのない空気調和
機の制御装置を提供することを目的としている。This invention was made in order to eliminate all of these problems, and when defrosting operation is performed during heating operation, when there is a large amount of frost, the system switches to the cooling cycle and performs defrosting at 15.
It is an object of the present invention to provide a control device for an air conditioner that suppresses a decrease in room temperature and does not impair comfort.
可変周波数電源で付勢される圧縮機と、冷房と１後房の
冷凍サイクルケ切り換える切換弁とを有した空気Ｓ４和
機の制御装置において、前記圧縮機の吐出乱と切換弁と
が冷媒配管で接続され、且つその冷媒配管の途中に開閉
弁が介装され、又熱交換器の着霜量を検出する検出手段
と、暖房運転中かどうかを判定する判定手段と、これら
の両手段からの出力に基づいて除霜運転を行うことを決
定する除霜運転決定手段とが設けられ、更に除霜運転時
に前記圧縮機及び開閉弁を制御して険相を行うと共に、
除ｎ開始後所定時間内に除霜が完了しない場合に前記切
換弁全切り換えて冷房運転にして除霜を行う除霜運転制
御装置が設けられている。In a control device for an air S4 generator, which has a compressor energized by a variable frequency power source and a switching valve that switches between cooling and one refrigeration cycle, the discharge disturbance of the compressor and the switching valve are connected to the refrigerant piping. A switching valve is connected to the refrigerant pipe, and an on-off valve is interposed in the middle of the refrigerant piping, and a detection means for detecting the amount of frost on the heat exchanger, a determination means for determining whether heating operation is in progress, and a control valve from both of these means. a defrosting operation determining means for determining whether to perform a defrosting operation based on the output;
A defrosting operation control device is provided which switches all of the switching valves to perform cooling operation and defrost when defrosting is not completed within a predetermined time after the start of defrosting.
暖房運転時に除霜運転が必要となった場合、除霜運転制
御装置は先ず圧縮機及び開閉弁全制御し暖房運転を行い
ながら除霜を行う。その結果所定時間内に除霜が完了し
ない場合、つまり着Ｎ量が多い場合には更に四方弁を切
換え、暖房サイクルから冷房サイクルに切り換えて除ｆ
！’に行う。When defrosting operation is required during heating operation, the defrosting operation control device first fully controls the compressor and on-off valve to perform defrosting while performing heating operation. As a result, if defrosting is not completed within the specified time, that is, if the amount of arriving N is large, the four-way valve is further switched and the heating cycle is switched to the cooling cycle to defrost the defrost.
! ' to do.
以下、この発明の実施例ゲ図面について説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings of embodiments of this invention will be described below.
第１図はこの発明の一実施例を示す概略構成図で、図中
１〜８及び１０〜２０は従来の第７図の同一符号のもの
と同−又（は相当部分であるので詳細説明は省略する。FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention. In the figure, 1 to 8 and 10 to 20 are the same or equivalent parts as those with the same reference numerals in FIG. 7, so a detailed explanation will be given. is omitted.
２１は電子式リニア膨張弁、２２は逆止弁、２３は圧縮
機３の吐出側と四方弁４との間に接続された電磁弁（開
閉弁）、２４はこの電磁弁２３と圧縮機３の吐出側の冷
媒配管１２を連結する冷媒配管、２５は毛細管６と電磁
弁２３を連結する冷媒配管、２６はこの冷媒配管２５か
ら分岐して逆止弁２２と連結された冷媒配管、２７は膨
張弁２１と室外側熱交換器５を連結している冷媒配管１
４と逆止弁２２とを連結する冷媒配管、２８は四方弁４
とアキュムレータ９を連結している冷媒配管１８と毛細
管６とを連結する冷媒配管で、これらの冷媒配管により
ヒートポンプ式冷凍サイクルの冷媒回路が形成されてい
る。２９は冷媒回路の所定の位置（室外側熱交換器５）
に設けられた温度検出器、３０はこの温度検出器２９の
検出値により室外側熱交換器５の霜の付着状態を検出す
る手段である霜取温度検出手段、３１は室内機２から送
られる情報により暖房運転中かどうかを判定する暖房運
転判定手段、３２は上記検出手段３０の出力データによ
り除霜運転が必要かどうかを判定する除霜運転判定手段
、３３は」−記者手段の出力に基づいて除脛運転を行う
こと金決定する除霜運転決定手段、３４は四方弁４を制
御して暖房サイクルから冷房サイクルへ空気調和機の冷
凍サイクル全期り換える四方弁制御手段、３５は圧縮機
３の運転周波数を規定周波数に設定してＦＥ縮機３を運
転する圧縮機制御手段、３６ｉ−ｉ除霜運転時に電磁弁
２３を開く電磁弁制御手段、３７は上記各手段３０〜３
６からなる除霜運転制御装置で、除霜運転時に圧縮機３
及び電磁弁２３を制御して除ｎを行うと共に、除霜開始
後所定時間内に除霜が完了しない場合には西方弁４を切
り換えて冷房運転を行い、除霜全完了させる。21 is an electronic linear expansion valve, 22 is a check valve, 23 is a solenoid valve (on-off valve) connected between the discharge side of the compressor 3 and the four-way valve 4, and 24 is this solenoid valve 23 and the compressor 3. 25 is a refrigerant pipe that connects the capillary tube 6 and the electromagnetic valve 23, 26 is a refrigerant pipe branched from this refrigerant pipe 25 and connected to the check valve 22, and 27 is a refrigerant pipe that connects the refrigerant pipe 12 on the discharge side. Refrigerant pipe 1 connecting expansion valve 21 and outdoor heat exchanger 5
4 and the check valve 22; 28 is the four-way valve 4;
A refrigerant pipe connects the capillary tube 6 to the refrigerant pipe 18 that connects the capillary tube 6 and the accumulator 9, and these refrigerant pipes form a refrigerant circuit of a heat pump type refrigeration cycle. 29 is a predetermined position in the refrigerant circuit (outdoor heat exchanger 5)
30 is a means for detecting the frost adhesion state of the outdoor heat exchanger 5 based on the detected value of the temperature detector 29; 31 is a defrosting temperature detection means for detecting the frost adhesion state on the outdoor heat exchanger 5; and 31 is a temperature sensor sent from the indoor unit 2. Heating operation determining means for determining whether heating operation is in progress based on the information; 32 is a defrosting operation determining means for determining whether defrosting operation is necessary based on the output data of the detection means 30; 33 is an output of the reporter means; 34 is a four-way valve control means for controlling the four-way valve 4 to switch the entire refrigeration cycle of the air conditioner from the heating cycle to the cooling cycle; 35 is a compression Compressor control means for operating the FE compressor 3 by setting the operating frequency of the compressor 3 to a specified frequency; 36i-i solenoid valve control means for opening the solenoid valve 23 during defrosting operation; 37, each of the above-mentioned means 30 to 3;
A defrosting operation control device consisting of 6 compressors 3 and 3 during defrosting operation.
and the solenoid valve 23 to perform defrosting, and if defrosting is not completed within a predetermined time after the start of defrosting, the west valve 4 is switched to perform cooling operation to completely complete defrosting.
第２図は上記除霜運転制御装置３７の一例を示す′眠気
回路図である。図中、３８は室内機２の制御回路で、除
霜運転制御装置３７のインターフェース３９と端子板４
６．４１を通して接続されている。４２は該制御装置３
７に設けられたマイクロコンピュータ（以下マイフンと
いう）で、上記インターフェース３９を介して室内機２
０制御回路３８と信号を送受信する。４３はＡ／Ｄ （
アナログ／ディジタル）変換器２９の抵抗値を温度情報
に変換してマイコン４２に入力する。４４，４５．４６
，４７はそれぞれマイコン４２を構成する入力回路、Ｃ
ＰＵ（中央情報処理回路）、メモリ及び出力回路、４８
は出力バッファ４８を通じて各制御用リレーコイル４９
．５０の駆動信号がマイコン４２から出力される。この
リレーコイル４９．５０が作動すると各々の常開接点（
ａ接点）５１．５２が閉じ、これで四方弁４及び電磁弁
２３は電源５３が供給されて作動する。５４はマイコン
４２の出力回路４７より出力される制御信号に従って圧
縮機３の駆動周波数を変換する可変周波数装置である。FIG. 2 is a drowsiness circuit diagram showing an example of the defrosting operation control device 37. In the figure, 38 is a control circuit of the indoor unit 2, and an interface 39 of the defrosting operation control device 37 and a terminal board 4.
Connected through 6.41. 42 is the control device 3
A microcomputer (hereinafter referred to as "MyFun") installed in the indoor unit 2
It transmits and receives signals to and from the 0 control circuit 38. 43 is A/D (
The resistance value of the analog/digital converter 29 is converted into temperature information and input to the microcomputer 42. 44, 45.46
, 47 are input circuits constituting the microcomputer 42, and C
PU (central information processing circuit), memory and output circuit, 48
is connected to each control relay coil 49 through the output buffer 48.
．． 50 drive signals are output from the microcomputer 42. When this relay coil 49.50 is activated, each normally open contact (
A contacts) 51 and 52 are closed, and the four-way valve 4 and the solenoid valve 23 are now supplied with power 53 and operated. 54 is a variable frequency device that converts the drive frequency of the compressor 3 in accordance with a control signal output from the output circuit 47 of the microcomputer 42.
次に、上記構成の制御装置の動作を第３図のフローチャ
ートを用いて説明する。このフローチャートハ、マイコ
ン４２のメモリ４６に記憶され、ＣＰＵ、１５で実行さ
れＡ詮腔運転制店Ｉプログラムを示すフローチャートで
ある。先ずプログラムのスタートにあたり、ステップ１
０１で暖房中かどうかを判定する。暖房運転中と判定さ
れると、ステップ１０２で四方弁４ｔＯＮにして冷凍ザ
イクルを暖房サイクルに切り挨え、ステップ１０３でタ
イマｓ１セットし、ステップ１０４でタイマＳが規定時
間茗より経過したかどうかを判別する。Next, the operation of the control device having the above configuration will be explained using the flowchart shown in FIG. This flowchart is a flowchart showing the A-snoop operation system I program which is stored in the memory 46 of the microcomputer 42 and executed by the CPU 15. First, to start the program, step 1
01 to determine whether heating is in progress. When it is determined that the heating operation is in progress, the four-way valve 4t is turned on in step 102 to cut off the freezing cycle to the heating cycle, the timer s1 is set in step 103, and the timer S checks whether the specified time has passed in step 104. Discern.
経過していればステップ１０５ＶＣで温度検出器２９に
より蒸発温度（局数温度）Ｌを測定し、ステップ１０６
にて上記測定した蒸発温度ｔが除ね運転開始温度ｔ０よ
り低いかどうかを判断し、低ければ除霜運転が実行され
る（ステップ１０７）。この除霜運転が開始されると、
まずステップ１０８で電磁弁２３が開かれるとともに、
ステップ１０９で除霜運転時の圧縮機運転周波数が可変
周波数装置５４から出力され、その周波数で圧縮機３が
運転される。その後、ステップ１）０にて第２のタイマ
Ｔ全セットし、ステップ１）１で再度蒸発温度を合測定
する。そして、ステップ１）２でその蒸発湿度【が除霜
迎転終了渇度ｔ、により高いかどうかを判断し、高い場
合には通常運転に戻るが高くない場合はステップ１）３
に進み、ここで上記ステップ１）０で設定したタイマＴ
が所定時間Ｔ０（着霜量が多いか少ないかどうかを決定
する時間）を経過したかを判定する。経過している場合
、つまり着霜量が多いと判断すると、ステップ１）４で
四方弁４をＯＦＦにして暖房サイクルから冷房サイクル
に冷凍サイクルを切換る。又、経過してい力い場合はス
テップ１）１に戻る。そして、ステップ１）５にて再び
蒸発温度ｔを測定し、ステップ１）６でこの測定温度ｔ
が除霜運転終了温度ｔ、より高いかどうかを判断する。If the elapsed time has elapsed, the evaporation temperature (station temperature) L is measured by the temperature detector 29 in step 105VC, and step 106
At step 107, it is determined whether the measured evaporation temperature t is lower than the defrosting operation start temperature t0, and if it is lower, the defrosting operation is executed (step 107). When this defrosting operation starts,
First, in step 108, the solenoid valve 23 is opened, and
In step 109, the compressor operating frequency during the defrosting operation is output from the variable frequency device 54, and the compressor 3 is operated at that frequency. Thereafter, in step 1) 0, the second timer T is fully set, and in step 1) 1, the total evaporation temperature is measured again. Then, in step 1) 2, it is determined whether the evaporation humidity [is higher than the defrosting transfer end thirst t], and if it is high, normal operation is resumed, but if it is not high, step 1) 3
Proceed to step 1) and set the timer T set in step 1) 0 above.
It is determined whether or not a predetermined time T0 (time for determining whether the amount of frost formation is large or small) has elapsed. If it has passed, that is, if it is determined that there is a large amount of frost, the four-way valve 4 is turned off in step 1) 4, and the refrigeration cycle is switched from the heating cycle to the cooling cycle. Also, if it has passed and it is not strong enough, return to step 1)1. Then, in step 1)5, the evaporation temperature t is measured again, and in step 1)6, this measured temperature t
It is determined whether or not is higher than the defrosting operation end temperature t.
高い場合には四方弁４’ａ：ＯＮにして通常運転に戻る
が、まだ低い場合には上記タイマＴが規定除霜終了時開
−より経過しているかどうかをステップ１）７で判断し
、経過していない場合はステップ１）５（Ｃｍるが、経
過している場合Ｇ・；ステップ１）８に移り、四方弁４
’ｋ ＯＮ Ｋする。そして、ステップ１）９で圧銭
鴬運転１！ｉｉ波数を通常運転周波数に戻すとともに、
ステップ１２０で電磁弁２３をＯＦＦにし、さらにステ
ップ１２１でタイマＴをリセットし、これで除霜運転が
終了となる（ステップ１２２）。If it is high, the four-way valve 4'a: is turned ON to return to normal operation, but if it is still low, it is determined in step 1) 7 whether or not the timer T has been opened at the end of the specified defrosting. If the time has not passed, go to step 1) 5 (Cm, but if it has passed, go to step 1) 8, and turn the four-way valve 4.
'k ON K. Then, in step 1) 9, it's pressure driving 1! ii Return the wave number to the normal operating frequency,
The solenoid valve 23 is turned off in step 120, and the timer T is reset in step 121, thereby ending the defrosting operation (step 122).
そして最後にステップ１２３でタイマＳをリセットして
初期に戻る。Finally, in step 123, the timer S is reset and the process returns to the initial state.
第４図は、上述した制御動作において暖房運転を行いな
がら、除霜運転が完了した時、つまり着霜量が少ない時
の動作タイムチャートである。時間Ｓ０で暖房運転が開
始したとすると、規定時間Ｓが経過した時開Ｓ、におい
て、霜取温度ｔが除付運転開始湛度ｔ。より低い時（Ａ
点）除霜タイマＴ（（設定（Ｔｏ）シて電磁弁２３を開
にし、圧縮機運転周波数を通常運転周波数より高い除Ｎ
運転周波数にして除霜運転を開始する。そして、除霜運
転規定時間もの間に霜取温度が除霜運転終了温度ｔｌよ
り高くなった時（Ｂ点）、電磁弁２３を閉にするととも
に圧縮機運転周波数を通常運転周波数に戻し、これで除
霜運転が終了する。FIG. 4 is an operation time chart when the defrosting operation is completed while performing the heating operation in the control operation described above, that is, when the amount of frost formation is small. Assuming that the heating operation starts at time S0, when the specified time S elapses, the defrosting temperature t reaches the defrosting operation start temperature t. When lower (A
Point) Set the defrost timer T ((setting (To)) to open the solenoid valve 23 and set the compressor operating frequency to
Set the operating frequency to start defrosting operation. When the defrost temperature becomes higher than the defrost operation end temperature tl during the defrost operation specified time (point B), the solenoid valve 23 is closed and the compressor operating frequency is returned to the normal operating frequency. The defrosting operation ends.
又、第５図は着霜量が多いと判断された時の動作タイム
チャートであり、除霜開始は第４図の場合と同様である
。今、除霜運転規定時間も経過後も霜取温度が除霜運転
終了温度ｔ、より低い時（０点）、西方弁４をＯＦＦに
して、暖房サイクルから冷房サイクルに冷凍サイクル？
切換え、霜取湿度ｔが除霜運転終了温度ｔ、より高くな
る（Ｄ点）と四方弁４ｉＯＮにするとともに、電磁弁２
３を閉にして圧縮機運転周波数を通常運転周波数に戻し
、これで除霜運転が終了する。Further, FIG. 5 is an operation time chart when it is determined that the amount of frost formation is large, and the start of defrosting is the same as in the case of FIG. 4. Now, even after the defrosting operation specified time has elapsed, when the defrosting temperature is lower than the defrosting operation end temperature t (0 point), the west valve 4 is turned OFF and the heating cycle is changed to the cooling cycle.
When the defrosting humidity t becomes higher than the defrosting operation end temperature t (point D), the four-way valve 4i is turned on, and the solenoid valve 2 is turned on.
3 is closed to return the compressor operating frequency to the normal operating frequency, and this completes the defrosting operation.
第６図はこの発明の他の実施例を示す概略構成図である
。この実施例は、冷媒の圧力を検出して’Ｍ ＄’５
ｉｔ ”ｘ検出するようにしたもので、室外側熱交換器
５に圧力検出器５５が設けられており、又除霜運転制御
装置３７には前述の霜取温度検出手段３０に代えて１取
圧力検出手段５６が設けられている。このような構成と
しても前述の実施例と同様の制御及び効果を得ることが
可能である。FIG. 6 is a schematic diagram showing another embodiment of the present invention. This embodiment detects the refrigerant pressure and calculates 'M $'5
The outdoor heat exchanger 5 is equipped with a pressure detector 55, and the defrosting operation control device 37 is equipped with a pressure detector 55 in place of the defrosting temperature detecting means 30 described above. A pressure detection means 56 is provided. Even with such a configuration, it is possible to obtain the same control and effect as in the above-described embodiment.
以上説明したように、この発明によれば、着霜−に応じ
１こ除霜運転を行うようにしたため、暖房運転時に除霜
を行う必要がある場合、着霜量が少とができ、着ｎｔｋ
が多い時のみ冷凍サイクルに切り換えて除霜運転を行え
ば良く、冷房運転時間が少なくなり、室温の低下を抑制
することができ、快適性を損うことがないという効果が
得られる。As explained above, according to the present invention, one defrosting operation is performed depending on the frost formation, so when it is necessary to defrost during heating operation, the amount of frost formation can be reduced and the frost formation can be reduced. ntk
It is only necessary to switch to the refrigeration cycle and perform defrosting operation when there is a large amount of air, which reduces the cooling operation time, suppresses a drop in room temperature, and provides the effect that comfort is not impaired.
第１図はこの発明の一実施例を示す概略構成図、第２図
は第１図の除霜運転制御装置の一例全示す電気回路図、
第３図はその動作金示すフローチャート、第４図はＮ霜
量が少ない時の動作タイムチャート、第５図は着１６量
が多い時の動作タイムチャート、第６図はこの発明の他
の実施例を示す概略構成図、第７図は従来の空気調和機
の制御装置を示す概略構成図である。
１・・・・・・・・・室外機
２・・・・・・・・・室内機
３・・・・・・・・・圧縮機
４・・・・・・・・・四方弁（切換弁）５・・・・・・
・・・室外側熱交換器
６・・・・・・・・・毛細管
２２・・・・・・・・・逆止弁
２３・・・・・・・・・電磁弁（開閉弁）２５〜２８・
・・・・・・・・冷媒配管２９・・・・・・・・・温度
検出器
３０・・・・・・・・・霜取温度検出手段３１・・・・
・・・・・暖房運転判定手段３２・・・・・・・・・除
霜運転判定手段３３・・・・・・・・・除霜運転決定手
段３４・・・・・・・・・四方弁制御手段３５・・・・
・・・・・圧縮機制御手段３６・・・・・・・・・［磁
弁制御手段３７・・・・・・・・・除霜運転制御装置５
５・・・・・・・・・圧力検出器
５６・・・・・・・・・霜取圧力検出手段なお、図中同
一符号に同−又は相当部分を示す。FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, FIG. 2 is an electric circuit diagram showing an example of the defrosting operation control device of FIG. 1,
Fig. 3 is a flowchart showing its operation, Fig. 4 is an operation time chart when the amount of N frost is small, Fig. 5 is an operation time chart when the amount of N frost is large, and Fig. 6 is another embodiment of the present invention. A schematic configuration diagram showing an example. FIG. 7 is a schematic configuration diagram showing a conventional air conditioner control device. 1......Outdoor unit 2...Indoor unit 3...Compressor 4...Four-way valve (switching valve) 5...
... Outdoor heat exchanger 6 ... Capillary tube 22 ... Check valve 23 ... Solenoid valve (on-off valve) 25 ~ 28・
......Refrigerant piping 29...Temperature detector 30...Defrost temperature detection means 31...
... Heating operation determining means 32 ... Defrosting operation determining means 33 ... Defrosting operation determining means 34 ... Four directions Valve control means 35...
. . . Compressor control means 36 . . . [Magnetic valve control means 37 . . . Defrosting operation control device 5
5...Pressure detector 56...Defrost pressure detection means In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (3)
房の冷凍サイクルを切り換える切換弁とを有した空気調
和機の制御装置において、前記圧縮機の吐出側と切換弁
とを冷媒配管で接続し、且つその冷媒配管の途中に開閉
弁を介装し、熱変換器の着霜量を検出する検出手段と、
暖房運転中かどうかを判定する判定手段と、これらの両
手段からの出力に基づいて除霜運転を行うことを決定す
る除霜運転決定手段とを設け、除霜運転時に前記圧縮機
及び開閉弁を制御して除霜を行うと共に、除霜開始後所
定時間内に除霜が完了していない場合に前記切換弁を切
り換えて冷房運転にして除霜を行う除霜運転制御装置を
設けたことを特徴とする空気調和機の制御装置。(1) In a control device for an air conditioner that has a compressor energized by a variable frequency power source and a switching valve that switches between cooling and heating refrigeration cycles, the discharge side of the compressor and the switching valve are connected to refrigerant piping. a detection means for detecting the amount of frost on the heat converter, which is connected to the refrigerant pipe and has an on-off valve interposed in the middle of the refrigerant pipe;
A determination means for determining whether the heating operation is in progress, and a defrosting operation determining means for determining whether to perform the defrosting operation based on outputs from both of these means are provided, and the compressor and the on-off valve are A defrosting operation control device is provided that controls the defrosting operation and defrosts the air conditioner, and also switches the switching valve to perform cooling operation and defrost the air if the defrosting is not completed within a predetermined time after the start of defrosting. An air conditioner control device featuring:
位置に設けた温度検出器の検出値により検出することを
特徴とする特許請求の範囲第１項記載の空気調和機の制
御装置。(2) Control of the air conditioner according to claim 1, wherein the detection means for detecting the amount of frost is detected by a detected value of a temperature detector provided at a predetermined position in the refrigerant circuit. Device.
する圧力検出器の検出値により検出することを特徴とす
る特許請求の範囲第１項記載の空気調和機の制御装置。(3) The control device for an air conditioner according to claim 1, wherein the detection means for detecting the amount of frost is detected by a detected value of a pressure detector that detects the pressure of the refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60274451A JPS62134464A (en) | 1985-12-06 | 1985-12-06 | Controller for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60274451A JPS62134464A (en) | 1985-12-06 | 1985-12-06 | Controller for air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62134464A true JPS62134464A (en) | 1987-06-17 |
Family
ID=17541872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60274451A Pending JPS62134464A (en) | 1985-12-06 | 1985-12-06 | Controller for air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62134464A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5060768A (en) * | 1988-11-30 | 1991-10-29 | Suzuki Jidosha Kogyo Kabushiki Kaisha | Creep control for a continuously variable transmission |
| JPH07186710A (en) * | 1993-12-27 | 1995-07-25 | Nippondenso Co Ltd | Air conditioner for electric vehicle |
| JP2007051805A (en) * | 2005-08-17 | 2007-03-01 | Matsushita Electric Ind Co Ltd | Air conditioner |
| WO2017042912A1 (en) * | 2015-09-09 | 2017-03-16 | 三菱電機株式会社 | Air conditioner |
| WO2019008742A1 (en) * | 2017-07-07 | 2019-01-10 | 三菱電機株式会社 | Refrigeration cycle device |
-
1985
- 1985-12-06 JP JP60274451A patent/JPS62134464A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5060768A (en) * | 1988-11-30 | 1991-10-29 | Suzuki Jidosha Kogyo Kabushiki Kaisha | Creep control for a continuously variable transmission |
| JPH07186710A (en) * | 1993-12-27 | 1995-07-25 | Nippondenso Co Ltd | Air conditioner for electric vehicle |
| JP2007051805A (en) * | 2005-08-17 | 2007-03-01 | Matsushita Electric Ind Co Ltd | Air conditioner |
| JP4654828B2 (en) * | 2005-08-17 | 2011-03-23 | パナソニック株式会社 | Air conditioner |
| WO2017042912A1 (en) * | 2015-09-09 | 2017-03-16 | 三菱電機株式会社 | Air conditioner |
| JPWO2017042912A1 (en) * | 2015-09-09 | 2018-03-01 | 三菱電機株式会社 | Air conditioner |
| WO2019008742A1 (en) * | 2017-07-07 | 2019-01-10 | 三菱電機株式会社 | Refrigeration cycle device |
| JPWO2019008742A1 (en) * | 2017-07-07 | 2020-05-21 | 三菱電機株式会社 | Refrigeration cycle equipment |
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