JPS6334434A - Defrosting operation device of heat pump type air conditioner - Google Patents
Defrosting operation device of heat pump type air conditionerInfo
- Publication number
- JPS6334434A JPS6334434A JP61179199A JP17919986A JPS6334434A JP S6334434 A JPS6334434 A JP S6334434A JP 61179199 A JP61179199 A JP 61179199A JP 17919986 A JP17919986 A JP 17919986A JP S6334434 A JPS6334434 A JP S6334434A
- Authority
- JP
- Japan
- Prior art keywords
- defrosting
- heat exchanger
- defrosting operation
- pressure
- compressor
- 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
- 238000010257 thawing Methods 0.000 title claims abstract description 67
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明はヒートポンプ式空調機の除霜運転装置、より詳
細には、室内熱交換器と室外熱交換器とを直列に接続し
た管路を、四方弁を介して圧縮機に接続し、暖房運転時
に除霜用１ノー七スイツプの作動により冷媒をリバース
、サイクルで楯１マさせ、所定の除霜時間だけ除霜運転
を行うようにしたヒートポンプ式空調機の除霜運転装置
に閏する。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is a defrosting operation device for a heat pump type air conditioner, more specifically, an indoor heat exchanger and an outdoor heat exchanger connected in series. The connected pipe line is connected to the compressor via a four-way valve, and during heating operation, the refrigerant is reversed by operating the defrosting 1/7 switch, and the refrigerant is cycled through the shield 1 cycle to perform defrosting operation for a predetermined defrosting time. This article describes a defrosting operation device for a heat pump air conditioner that is designed to perform the following steps.
（従来の技術）
この種のヒートポンプ式空：ＪＪｉの典型的描成例を第
４図により説明する。圧縮機２を右する管路１と、室内
熱交換２１ｉ４、冷房用絞り５、暖房用較り６、および
室外熱交換３７をこの順に直列接続した管路３とを、四
方弁９を介して接続υ゛ることにより冷凍りイクルが構
成されている。−；ゴ内熱交換器４には室内ファン４Ｆ
が設けられ、室外熱交換器７には室外フッ７ン７「が設
りられ′Ｃいる。また、冷房用絞り５には、暖房運転ｌ
）にこれをバイパスする逆止弁５Ｒが並設され、暖房Ｉ
ＩＩ絞り６には、冷房運転時にこれをバイパスする逆市
井８が並設されている。なお、室内熱交換器４、室内フ
ァン４Ｆおよび冷房用絞り５は室内ユニットＵ１を構成
し、他の機器により室外ユニットＵ２を構成している。(Prior Art) A typical drawing example of this type of heat pump type sky: JJi will be explained with reference to FIG. A conduit 1 leading to the compressor 2 and a conduit 3 in which an indoor heat exchanger 21i4, a cooling aperture 5, a heating aperture 6, and an outdoor heat exchanger 37 are connected in series in this order are connected via a four-way valve 9. A refrigeration cycle is constructed by the connections υ゛. −; Indoor heat exchanger 4 has indoor fan 4F
The outdoor heat exchanger 7 is provided with an outdoor vent 7'.
) is installed in parallel with a check valve 5R that bypasses this, and the heating I
In parallel to the II throttle 6, there is a reverse channel 8 that bypasses the throttle during cooling operation. Note that the indoor heat exchanger 4, indoor fan 4F, and cooling throttle 5 constitute an indoor unit U1, and other devices constitute an outdoor unit U2.
第４図の冷凍サイクルにおいては、暖房運転時には四方
弁９により、実線矢印で示寸ように、圧縮機２から吐出
された冷媒が室内熱交換器４を通ってから室外熱交換器
７を介して圧縮機２に戻る経路で環１ｎ−５１−る。冷
房運転時または後述の室外熱交換器７のための除霜運転
時には、四方弁９の切換により、破線で示すように、圧
縮機２からのホットガスを先に室外熱交換？Ａ７に流し
た後、室内熱交換４４を介して圧縮機２へ戻り経路で１
ｍ流させる。In the refrigeration cycle shown in FIG. 4, during heating operation, the four-way valve 9 causes the refrigerant discharged from the compressor 2 to pass through the indoor heat exchanger 4 and then through the outdoor heat exchanger 7, as indicated by the solid arrow. The ring 1n-51- is then returned to the compressor 2. During cooling operation or defrosting operation for the outdoor heat exchanger 7 (described later), by switching the four-way valve 9, as shown by the broken line, the hot gas from the compressor 2 is first transferred to the outdoor heat exchanger. After flowing to A7, it returns to the compressor 2 via the indoor heat exchanger 44 and returns to the compressor 2.
Let m flow.
圧縮機２の吐出側には過圧検出用、例えば３０８９／ａ
Ａ以上の圧力を検出して接点を開じる高圧スイッチ１０
が設けられ、室外熱交換器７の絞り側には所定以下の温
度で接点を履ｌじる除霜用サーモスイッチ１１が設けら
れ又いる。For overpressure detection, for example, 3089/a is installed on the discharge side of the compressor 2.
High pressure switch 10 that opens contacts when detecting pressure of A or higher
A defrosting thermoswitch 11 is provided on the constriction side of the outdoor heat exchanger 7 and closes its contacts at a temperature below a predetermined temperature.
以上の冷凍サイクルを暖房運転とするとさは、四方弁９
を実線矢印の冷媒流れが生ずるように切換え、図示して
いない室温ヒンリの検出温度が設定値となるように図ホ
していないｉ、ＩＩ ｍ装置１によりオンオフ運転を繰
返して室温をｉ、制御する。If the above refrigeration cycle is used for heating operation, the four-way valve 9
is switched so that the refrigerant flow as shown by the solid line arrow occurs, and the room temperature is controlled by repeating on/off operation using the device 1 (not shown) so that the detected temperature of the room temperature (not shown) becomes the set value. do.
暖房運転を続けて室外熱交換：も７に着霜して温度低下
により除霜用サーモスイッチ１１が作動する（第５図ス
テップ５１）と、圧縮１１２をメツとし、安定化のため
のわずかな持ち時間寸ムわら除霜持ちｖ１閤だけ持って
（ステップ５２）除゛霜運転（ステップ５３）に入る。Continuing heating operation and outdoor heat exchange: When frost forms on the outside and the temperature drops, the defrosting thermoswitch 11 is activated (Step 51 in Figure 5), the compression 112 is turned on and a small amount of air is turned on for stabilization. The defrosting operation is started (step 53) with only the defrosting time v1 (step 52).
この除霜運転は、四方弁９を冷１７１運転側（これを仮
にオフ側と１６）とし、室外ファン７Ｆをオフ、室内フ
ァン４［をＡ）として圧縮機２をオン（運転）とするこ
とにＪ、り行われる。この除霜運転は予め設定された除
霜時間を経過するか（ステップ５４）除霜用リレしスイ
ッチ１１がオフとなる（ステップ５５）まで継続される
。In this defrosting operation, the four-way valve 9 is set to the cold 171 operating side (temporarily set to the off side and 16), the outdoor fan 7F is turned off, the indoor fan 4 is set to A, and the compressor 2 is turned on (operated). It will be held in J. This defrosting operation is continued until a preset defrosting time elapses (step 54) or the defrosting relay switch 11 is turned off (step 55).
第６図は、以上述べた除霜運転を実施する回路である。FIG. 6 shows a circuit for carrying out the defrosting operation described above.
図は便宜上、ｉ制御要素もパワー要素も同一の電源母線
Ｒ，Ｓに接続されているものとして示さ机でいる。図に
おいて、ＡＸｌ、ＡＸ２は補助リレーであり、Ｔｌｏは
除霜持ちタイマ、Ｔ２は除霜時間を設定する除霜タイマ
、２Ｍは圧縮機２を駆動Ｊるモータである。各補助リレ
ーおよびタイマのメーク接点は各補助リレーないしタイ
マを去り符号にａｌ、ａ２．８３・・・を連記しで示さ
れ、ブレーク接点は同様にｂｌ、ｂ２．ｂ３・・・を連
記して示されている。なお、第６図においては、冷１７
１運転側
運転のためのｉ制御回路のみが抽出されて示されている
。For convenience, the figure shows that both the i-control element and the power element are connected to the same power supply buses R and S. In the figure, AXl and AX2 are auxiliary relays, Tlo is a defrosting timer, T2 is a defrosting timer that sets the defrosting time, and 2M is a motor that drives the compressor 2. The make contacts of each auxiliary relay or timer are shown by adding al, a2.83, . . . apart from each auxiliary relay or timer, and the break contacts are bl, b2, . b3... is shown in combination. In addition, in Figure 6, cold 17
Only the i control circuit for the 1-drive side operation is extracted and shown.
除霜用＋ｊ−モスイッチ１１がオンになると補助リレー
ＡＸＩのメータ接点ＡＸ１ａ１、および補助リレーＡＸ
２のブレーク接点へＸ２ｂ２を介して除霜持らタイマＴ
１が始動する。除霜時らタイマＴ１のタイムアツプによ
り接点Ｔｌａがオンとなり、補助リレーＡＸ２が励ｔａ
され、接点△Ｘ２ａｌを介して白己保１、′Ｉσる。補
助リレー八Ｘ２は除霜運転指令用のリレーであり、その
励磁により、接点△Ｘ２８２を介して除霜タイマＴ２が
カウンｌ〜動作を始めると共に、接点ＡＸ２ａ３を介し
て圧縮機用モータ２Ｍが運転され、接点ＡＸ２ｂ２ 、
ＡＸ２ｂ３ 、ＡＸ２ｂ４を介してそれぞれ四方弁９、
室外ファン７ＦＪ３よび室内ファン４Ｆがオフとされ、
ここに除霜運転が行われる。この後、除霜用量ナー七ス
イッチ１１がオフとなって補助リレー接点ＡＸ１ａ２が
オフになるか、除霜タイマＴ２がタイムアツプとなって
接点Ｔ２ｂがオフによると補助リレーへＸ２の自己保持
が解除され、除霜運転が終了する。以下、図示していな
いυ１ｔＩＩｌ装置によりｌ！！！房運転に入る。When the defrosting +j-moswitch 11 is turned on, the meter contact AX1a1 of the auxiliary relay AXI and the auxiliary relay AX
The defrost timer T is held via X2b2 to the break contact of 2.
1 starts. When timer T1 times up during defrosting, contact Tla turns on, and auxiliary relay AX2 is activated.
Then, through the contact △ Auxiliary relay 8X2 is a defrost operation command relay, and when it is energized, the defrost timer T2 starts counting through the contact ΔX282, and the compressor motor 2M starts operating through the contact AX2a3. and contact AX2b2,
The four-way valve 9 is connected via AX2b3 and AX2b4, respectively.
Outdoor fan 7FJ3 and indoor fan 4F are turned off,
Defrosting operation is performed here. After this, if the defrost volume drain switch 11 is turned off and the auxiliary relay contact AX1a2 is turned off, or if the defrost timer T2 times up and the contact T2b is turned off, the self-holding of X2 is released to the auxiliary relay. , the defrosting operation ends. Hereinafter, the l! ! ! Start driving.
以上のような従来の除霜運転装置においては、外気温度
が低下すると、瀧疫が低くて室外熱交換器７にたとえ着
霜も着露し無い状１ざであつ（し、除霜用１ｊ−土スイ
ッチ１１がオンとなって除霜運転に入ることになる。こ
こで問題となるのｔよ、ン；霜も着露も無い状態で除霜
運転を行うと、室外熱交換器７の表面の潜熱を奪うこと
なく放熱・」るので圧縮機側圧力が急激に上界すること
である。この圧力上昇に伴って温度も急激に上ＦＦＴる
。しかし、除霜用ザーモスイッチ１１μ通゛常、ガス封
入式感熱管の中に構成されており、したがって熱時定数
が大さいので急激な温度変化には追従−Ｃきず、そのた
め除霜運転を１〜２分程度継続し、その結果、高圧スイ
ッチ１０が作動してしまうことがある。この高圧スイッ
チ１０の作動はシステム全体を完全停止とさせることに
なるので好ましくない。In the conventional defrosting operation device as described above, when the outside air temperature decreases, the outdoor heat exchanger 7 is in a state where no frost or dew is formed due to low water pollution (and the defrosting 1j - The soil switch 11 is turned on and the defrosting operation begins.There is a problem here.If the defrosting operation is performed in the absence of frost or dew, the outdoor heat exchanger 7 The pressure on the compressor side rises rapidly because the heat is radiated without taking away the latent heat from the surface. With this rise in pressure, the temperature also rises rapidly (FFT). However, the defrosting thermoswitch 11μ It is constructed in a gas-filled heat-sensitive tube, and therefore has a large thermal time constant, so it cannot follow sudden temperature changes. Therefore, defrosting operation continues for about 1 to 2 minutes, and as a result, high pressure The switch 10 may be activated.This activation of the high-pressure switch 10 is undesirable because it causes the entire system to come to a complete stop.
（発明が解決しようとする問題点）
したがって本発明は着霜やね露の無い状態で行われる除
霜運転を短縮し、高効率かつ快適な暖房運転を実現し得
るヒートポンプ式空調機の除霜運転装置を提供すること
を目的とする。(Problems to be Solved by the Invention) Therefore, the present invention provides defrosting for a heat pump air conditioner that can shorten the defrosting operation that is performed in the absence of frost formation or dew, and realize highly efficient and comfortable heating operation. The purpose is to provide driving equipment.
（問題点を解決するための手段）
本発明の除霜運転装Ｈは、圧縮機の吐出側の圧力が所定
値以上になったとき作動する圧カスイツヂと、この圧力
スイッチの作動時に、前記除霜用リーモスイッヂが未復
帰で屓定の除霜時局が経過していなくても、除霜運転を
強制的に完了さける手段とを具備したことを特徴と１Ｊ
る。(Means for Solving the Problems) The defrosting operation device H of the present invention includes a pressure switch that operates when the pressure on the discharge side of the compressor exceeds a predetermined value, and a defrosting switch that operates when the pressure switch is activated. 1J characterized in that it is equipped with a means for forcibly completing the defrosting operation even if the frost remo switch has not returned and the predetermined defrosting period has not elapsed.
Ru.
（作 用）
本発明によれば、室外熱交換器に着霜や着露のない状態
で除霜運転をしたときに生ずる圧力上界を圧力スイッチ
で検知し、その検知出力で除霜運転を強υ１的に完了さ
せるので、低温・低湿；ｑの条件下、寸なわら大して着
霜や着露のない状態下での除霜運転を短時間で切上げ、
本来の暖房運転に入ることができ、暖房効率を上げるこ
とができる。(Function) According to the present invention, the pressure upper limit that occurs when defrosting operation is performed in a state where there is no frost or dew condensation on the outdoor heat exchanger is detected by the pressure switch, and the defrosting operation is performed using the detection output. Since the defrosting operation is completed in a short period of time, the defrosting operation can be completed in a short time under conditions of low temperature, low humidity, and without significant frost or dew formation.
The original heating operation can be started and heating efficiency can be increased.
（実施例） 第１図は本発明の一実施例を示すもので・ある。(Example) FIG. 1 shows an embodiment of the present invention.
ここでも第６図と同様に冷暖房運転のための制御回路部
分は省略されている。ここでは第６図の回路に対して新
たに圧力スイッチ１２が設りられ工いる。圧力スイッチ
１２は、第３図に示Ｊように圧縮機２の吐出側に設けら
れ、高圧スイッチ１１の設定圧力よりも低い過圧力でヒ
ステリシス特性をもって作動し、例えば２３ ＫＣＩ／
ｃｉぐオフし、１８幻／−で復帰（オン）するスイッ
チであって、除雪用サーモスイッチ１１に直列に接続さ
れている。他の回路ＢＳ分は第６図のものと変わりがな
い。Here, as in FIG. 6, the control circuit portion for heating and cooling operation is omitted. Here, a pressure switch 12 is newly installed in the circuit shown in FIG. The pressure switch 12 is provided on the discharge side of the compressor 2 as shown in FIG. 3, and operates with hysteresis characteristics at an overpressure lower than the set pressure of the high pressure switch 11.
This is a switch that turns off at 18 seconds and returns (turns on) at 18/-, and is connected in series to the snow removal thermoswitch 11. The other circuits BS are the same as those in FIG.
第１図の回路の動作を、第２図のフローチャートを参照
して説明する。ここでスデツプ５１〜５５の部分の動作
は第５図および第６図を参照して説明した従Ｘ技術と同
一である。除霜運転中に、すでに述べた理由によりＪ１
縮機２の吐出測寸なわら室外熱交換ム７の圧縮機側の圧
力が上昇するとＦＥカスイッチ１２がオフとなる。これ
により補助リレーＡＸ１の励磁が解除され、接点ＡＸ１
ａ２ｈ＜ ｉフとなるので、補助リレーＡＸ２の励磁も
解除される。これは除霜運転の終了を意味する（スデッ
プ５６）、Ｉｆカスイッチ１２がオン状態を継続する圧
力状態下では第５図および第６図を参照して説明したの
と全く同一の動作を行う。The operation of the circuit shown in FIG. 1 will be explained with reference to the flowchart shown in FIG. Here, the operation of steps 51 to 55 is the same as the conventional X technique described with reference to FIGS. 5 and 6. During defrosting operation, J1
When the pressure on the compressor side of the outdoor heat exchanger 7 increases while measuring the discharge size of the compressor 2, the FE switch 12 is turned off. As a result, auxiliary relay AX1 is de-energized and contact AX1
Since a2h<i, the auxiliary relay AX2 is also deenergized. This means the end of the defrosting operation (Step 56). Under the pressure condition where the If switch 12 continues to be in the ON state, the operation is exactly the same as that described with reference to FIGS. 5 and 6. .
以上の構成によれば、もともと除霜運転の必要のない無
着霜状態での除霜運転を、圧力上昇を検知して完了とさ
ぼることにより、従来の大時定数の除霜用リーモスイッ
チによる１〜２分から２０〜３０秒稈度に短縮ざゼるこ
とがぐきる。According to the above configuration, by detecting a pressure rise and skipping defrosting operation in a non-frosting state where defrosting operation is not originally required, it is possible to use the conventional large time constant defrosting remote switch. It is easy to reduce the culm size from 1 to 2 minutes to 20 to 30 seconds.
なお、第１図の回路の制御信号回路部分はコンピュータ
のソフトウェアによって実現することらできる。Note that the control signal circuit portion of the circuit shown in FIG. 1 can be realized by computer software.
（発明の効果）
本発明によれば、圧Ｓ機の吐出側に設けた圧力スイッチ
により除ｉ運転を終了させることにより、除霜用１ノー
モスイツチの作動に基づいて無る霧状態で行われた、本
来不要の除霜運転を短縮し、暖房効率を向上さけ、快適
な暖房を行うことができる。(Effects of the Invention) According to the present invention, by terminating the defrosting operation with the pressure switch provided on the discharge side of the pressure S machine, the defrosting operation is performed in a fog-free state based on the operation of the defrosting switch 1. , it is possible to shorten unnecessary defrosting operations, improve heating efficiency, and provide comfortable heating.
第１図は本発１１の一実施例を示す結線図、第２図は同
装置の動作を承りフローチャート、第３図は本発明を適
用する冷凍リイクルの系統図、第４図は公知の冷凍１ｊ
イクルの系統図、第５図は従来装置の動作を説明りるた
めのフローチＩｐ −ト、第６図は同フローチャートの
動作を実施する従来装置の結線図である。
２・・・圧縮機、２Ｍ・・・圧縮機用電動機、４・・・
室内熱交換器、４Ｆ・・・室内ファン、７・・・室外熱
交Ｉ５！答、７Ｆ・・・室外ファン、９・・・四方弁、
１０・・・高圧スイッチ、１１・・・除霜用１ナーモス
イツヂ、１２・・・圧力スイッチ、Ｔ１・・・除霜持ち
タイマ、Ｔ２・・・除霜タイマ、ＡＸｌ、ＡＸ２・・・
補助リレー。
出願人代理人 佐 藤 −雄
鶴１図
第３図
第６図Fig. 1 is a wiring diagram showing one embodiment of the present invention 11, Fig. 2 is a flowchart showing the operation of the device, Fig. 3 is a system diagram of a refrigerated recycle to which the present invention is applied, and Fig. 4 is a known refrigeration system. 1j
FIG. 5 is a flowchart for explaining the operation of the conventional device, and FIG. 6 is a wiring diagram of the conventional device implementing the operation of the same flowchart. 2...Compressor, 2M...Compressor electric motor, 4...
Indoor heat exchanger, 4F...Indoor fan, 7...Outdoor heat exchanger I5! Answer: 7F...Outdoor fan, 9...Four-way valve,
DESCRIPTION OF SYMBOLS 10...High pressure switch, 11...Defrosting 1 thermo switch, 12...Pressure switch, T1...Defrosting timer, T2...Defrosting timer, AXl, AX2...
Auxiliary relay. Applicant's agent: Sato - Yuzuru Figure 1 Figure 3 Figure 6
Claims (1)
、四方弁を介して圧縮機に接続し、暖房運転時に除霜用
サーモスイッチの作動により冷媒をリバースサイクルで
循環させ、所定の除霜時間だけ除霜運転を行うようにし
たヒートポンプ式空調機の除霜運転装置において、 前記圧縮機の吐出側の圧力が所定値以上になつたとき作
動する圧力スイッチと、この圧力スイッチの作動時に前
記除霜用サーモスイッチが未復帰で所定の除霜時間が経
過していなくても、除霜運転を強制的に完了させる手段
とを具備したことを特徴とするヒートポンプ式空調機の
除霜運転装置。[Claims] A pipe line connecting an indoor heat exchanger and an outdoor heat exchanger in series is connected to a compressor via a four-way valve, and the refrigerant is reversed by the operation of a defrosting thermoswitch during heating operation. In a defrosting operation device for a heat pump air conditioner that circulates in a cycle and performs defrosting operation for a predetermined defrosting time, a pressure switch that operates when the pressure on the discharge side of the compressor exceeds a predetermined value. and means for forcibly completing the defrosting operation even if the defrosting thermoswitch is not reset and the predetermined defrosting time has not elapsed when the pressure switch is activated. Defrosting operation device for heat pump air conditioners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61179199A JPS6334434A (en) | 1986-07-30 | 1986-07-30 | Defrosting operation device of heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61179199A JPS6334434A (en) | 1986-07-30 | 1986-07-30 | Defrosting operation device of heat pump type air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6334434A true JPS6334434A (en) | 1988-02-15 |
Family
ID=16061660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61179199A Pending JPS6334434A (en) | 1986-07-30 | 1986-07-30 | Defrosting operation device of heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6334434A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010010939A (en) * | 1999-07-23 | 2001-02-15 | 황한규 | Controller of defroster of a air-conditioner and method for controlling the same |
| WO2007059710A1 (en) * | 2005-11-25 | 2007-05-31 | Gree Electric Appliances Inc. Of Zhuhai | An intelligent defrosting control method for an air conditioner |
-
1986
- 1986-07-30 JP JP61179199A patent/JPS6334434A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010010939A (en) * | 1999-07-23 | 2001-02-15 | 황한규 | Controller of defroster of a air-conditioner and method for controlling the same |
| WO2007059710A1 (en) * | 2005-11-25 | 2007-05-31 | Gree Electric Appliances Inc. Of Zhuhai | An intelligent defrosting control method for an air conditioner |
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