JPH0230420B2 - - Google Patents
Info
- Publication number
- JPH0230420B2 JPH0230420B2 JP58069179A JP6917983A JPH0230420B2 JP H0230420 B2 JPH0230420 B2 JP H0230420B2 JP 58069179 A JP58069179 A JP 58069179A JP 6917983 A JP6917983 A JP 6917983A JP H0230420 B2 JPH0230420 B2 JP H0230420B2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- refrigeration cycle
- outdoor heat
- temperature
- defrosting
- 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.)
- Expired - Lifetime
Links
- 238000010257 thawing Methods 0.000 claims description 32
- 238000005057 refrigeration Methods 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 10
- 230000001186 cumulative effect Effects 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 description 16
- 230000007423 decrease Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は空気調和機等に組み込まれる冷凍サ
イクルの除霜運転制御方法に係り、特に暖房運転
中外気温度が高いとき、冷凍サイクルを反転除霜
することなく除霜運転を行ない得るようにした冷
凍サイクルの除霜運転制御方法に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a defrosting operation control method for a refrigeration cycle incorporated in an air conditioner, etc., and in particular, when the outside temperature is high during heating operation, the refrigeration cycle is reversed and defrosted. The present invention relates to a defrosting operation control method for a refrigeration cycle that allows defrosting operation to be performed without having to do so.
一般に、空気調和機は圧縮機、四方弁、室内側
熱交換器、キヤピラリチユーブまたは膨脹弁、室
外側熱交換器を順次接続して冷媒を循環させる冷
凍サイクルを構成し、四方弁を切り換えることに
より室内を冷暖房することができるようになつて
いる。
Generally, an air conditioner consists of a refrigeration cycle that circulates refrigerant by sequentially connecting a compressor, a four-way valve, an indoor heat exchanger, a capillary tube or an expansion valve, and an outdoor heat exchanger, and then switching the four-way valve. It is now possible to heat and cool the room.
春先等のように外気温度が比較的高い状態で暖
房運転を行なう場合には、冷凍サイクルの暖房負
荷が小さいために、高温（高圧）レリース制御が
行なわれる。高温レリース制御は、室外側熱交換
器の室外側送風フアン（送風フアン用リレーK4）
を第１図に示すように定期的に停止させて室外側
熱交換器の吸熱量（冷媒蒸発量）を下げ、室内側
熱交換器での冷媒凝縮圧力を低下させている。室
外側送風フアンが起動・停止を繰り返すと、室外
側熱交換器の熱交換コイル表面温度Teが低下し、
外気温度（室外温度）Toが高くても熱交換コイ
ルに着霜してくる。このため、従来の空気調和機
では、高温レリース制御運転の運転時間（レリー
ス積算時間）が一定時間に達すると、除霜運転に
入り、室外側熱交換器に着いた霜を除霜するよう
になつている。 When heating operation is performed when the outside air temperature is relatively high, such as in early spring, high temperature (high pressure) release control is performed because the heating load on the refrigeration cycle is small. High-temperature release control is performed by the outdoor fan of the outdoor heat exchanger (relay K 4 for the fan).
As shown in FIG. 1, the system is stopped periodically to reduce the amount of heat absorbed (the amount of refrigerant evaporated) in the outdoor heat exchanger, thereby reducing the refrigerant condensation pressure in the indoor heat exchanger. When the outdoor fan repeatedly starts and stops, the surface temperature Te of the heat exchange coil of the outdoor heat exchanger decreases.
Even if the outside air temperature (outdoor temperature) To is high, frost forms on the heat exchange coil. For this reason, in conventional air conditioners, when the operation time of high temperature release control operation (release cumulative time) reaches a certain time, it enters defrost operation to defrost the frost that has formed on the outdoor heat exchanger. It's summery.
除霜運転は、四方弁を切換える反転除霜により
行なわれているが、四方弁切換えによる反転除霜
では、除霜時に暖房運転が停止せしめられるだけ
でなく、室内側熱交換器での吸熱作用（冷媒蒸発
作用）が避けられず、室温Tiの低下が著しい。 Defrosting operation is performed by reversing defrosting by switching a four-way valve. However, reversing defrosting by switching a four-way valve not only stops the heating operation during defrosting, but also reduces the heat absorption effect in the indoor heat exchanger. (refrigerant evaporation effect) is unavoidable, resulting in a significant drop in room temperature Ti.
ところで、高温レリース制御に入る様な運転条
件、すなわち、外気温度Toが高い状態で暖房運
転を継続した場合、室外側熱交換器の熱交換コイ
ル面の着霜は成長が著しく遅いため、除霜運転は
から除霜が多い。しかも、外気温度Toの高い状
態では除霜運転時にも室外側熱交換器の温度Te
は外気温度Toよりも一般的に低いことがある。 By the way, under operating conditions that require high-temperature release control, that is, when heating operation is continued under conditions where the outside air temperature To is high, the growth of frost on the heat exchange coil surface of the outdoor heat exchanger is extremely slow. During operation, there is a lot of defrosting. Moreover, when the outside air temperature To is high, the temperature Te of the outdoor heat exchanger is increased even during defrosting operation.
is generally lower than the outside temperature To.
この発明は上述した点を考慮し、高温レリース
制御時に、冷凍サイクルを反転させることなく、
外気エンタルピを利用した除霜を可能にし、暖房
効果を損なわないで除霜できるようにした冷凍サ
イクルの除霜運転制御方法を提供することを目的
とする。
This invention takes the above-mentioned points into account, and during high-temperature release control, the refrigeration cycle is not reversed.
To provide a defrosting operation control method for a refrigeration cycle that enables defrosting using outside air enthalpy and defrosting without impairing the heating effect.
上述した目的を達成するため、この発明に係る
冷凍サイクルの除霜運転制御方法は、圧縮機、四
方弁、室内側熱交換器および室外側熱交換器等を
順次接続して構成された冷凍サイクルの暖房運転
時に、外気温度が所定温度以上のとき、高温ある
いは高圧レリース制御運転して前記室外側熱交換
器の送風フアンの作動・停止を繰り返し、上記送
風フアンの作動・停止の積算時間が一定値に達し
たとき除霜運転を行なう運転制御方法において、
上記除霜運転時にのみ、圧縮機を停止させて室外
側熱交換器の送風フアンを作動状態に維持するも
のである。
In order to achieve the above-mentioned object, the defrosting operation control method for a refrigeration cycle according to the present invention provides a refrigeration cycle configured by sequentially connecting a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, etc. During heating operation, when the outside air temperature is higher than a predetermined temperature, high temperature or high pressure release control operation is performed to repeatedly activate and stop the ventilation fan of the outdoor heat exchanger, and the cumulative time of activation and deactivation of the ventilation fan is constant. In an operation control method that performs defrosting operation when a certain value is reached,
Only during the defrosting operation, the compressor is stopped and the blower fan of the outdoor heat exchanger is kept in operation.
以下、この発明の好ましい一実施例について添
付図面を参照して説明する。
Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
第２図は室内を冷暖房可能なヒートポンプ式空
気調和機を示し、この空気調和機は、圧縮機１、
四方弁２、室内側熱交換器３、並列接続された逆
止弁４および膨脹弁５、キヤピラリチユーブ６、
室外側熱交換器７を順次接続して閉じた冷凍サイ
クル８が構成される。この冷凍サイクル８を構成
する圧縮機１や室内側および室外側熱交換器３，
７の送風フアン３ａ，７ａのフアンモータ３ｂ，
７ｂの起動・停止は第３図に示すリレーK1，K2，
K4により、四方弁２の暖房側あるいは冷房側切
り換えはリレーK3により行なわれ、各リレーK1
〜K4の作動制御はマイクロコンピユータ９によ
り行なわれる。マイクロコンピユータ９には室内
側熱交換器３に取付けられた温度センサ１０から
の出力が入力されるようになつている。 Figure 2 shows a heat pump type air conditioner that can cool and heat a room, and this air conditioner consists of a compressor 1,
a four-way valve 2, an indoor heat exchanger 3, a check valve 4 and an expansion valve 5 connected in parallel, a capillary tube 6,
A closed refrigeration cycle 8 is constructed by sequentially connecting the outdoor heat exchangers 7. Compressor 1 and indoor and outdoor heat exchangers 3, which constitute this refrigeration cycle 8,
7 ventilation fan 3a, fan motor 3b of 7a,
7b is started and stopped by relays K 1 , K 2 , and
Switching between the heating side and the cooling side of the four-way valve 2 is performed by relay K 3 using K 4 , and each relay K 1
The operation of K4 to K4 is controlled by a microcomputer 9. The microcomputer 9 is configured to receive an output from a temperature sensor 10 attached to the indoor heat exchanger 3.
次に、冷凍サイクルの作用について説明する。 Next, the operation of the refrigeration cycle will be explained.
始めに、冷房運転時には、四方弁２を冷房側
（リレーK3をOFFに）セツトし、圧縮機１および
室内側、室外側熱交換器３，７のフアンモータ３
ｂ，７ｂを起動させる。これにより、圧縮機１か
らの高温・高圧の吐出冷媒は四方弁２を経て室外
側熱交換器７に案内され、ここで凝縮される。凝
縮された冷媒は続いてキヤピラリチユーブ６およ
び膨脹弁５を経て膨脹作用を受けた後、室内側熱
交換器３に送られる。室内側熱交換器３に送られ
た液冷媒は周囲から熱を奪つて蒸発する。液冷媒
の蒸発作用により吸熱されて室内空気は冷却さ
れ、その冷却風は送風フアン３ａから室内に吹き
出され、室内を冷房している。 First, during cooling operation, the four-way valve 2 is set to the cooling side (relay K 3 is turned OFF), and the fan motors 3 of the compressor 1 and the indoor and outdoor heat exchangers 3 and 7 are turned off.
Activate b, 7b. Thereby, the high-temperature, high-pressure refrigerant discharged from the compressor 1 is guided to the outdoor heat exchanger 7 via the four-way valve 2, where it is condensed. The condensed refrigerant is then expanded through the capillary tube 6 and the expansion valve 5, and then sent to the indoor heat exchanger 3. The liquid refrigerant sent to the indoor heat exchanger 3 absorbs heat from the surroundings and evaporates. Indoor air is cooled by absorbing heat due to the evaporation action of the liquid refrigerant, and the cooling air is blown into the room from the blower fan 3a to cool the room.
室内を冷房して蒸発した冷媒は四方弁２を経て
圧縮機１に還流され、１つの冷房サイクルが終了
する。 The refrigerant that cools the room and evaporates is returned to the compressor 1 through the four-way valve 2, and one cooling cycle is completed.
次に、暖房時には、四方弁２のリレーK3をON
にし、四方弁２を暖房側に切り換える。四方弁２
を暖房側にセツトして圧縮機１に通電すると、圧
縮機１からの高温・高圧の吐出冷媒は、四方弁２
を経て室内側熱交換器３に送られ、ここで室内空
気と熱交換して室内空気を暖める。暖められた室
内空気は温風となつて送風フアン３ａから吹き出
され、室内を暖房する。 Next, during heating, turn on relay K3 of four-way valve 2.
and switch the four-way valve 2 to the heating side. Four-way valve 2
When the refrigerant is set to the heating side and the compressor 1 is energized, the high temperature and high pressure refrigerant discharged from the compressor 1 flows through the four-way valve 2.
The air is then sent to the indoor heat exchanger 3, where it exchanges heat with indoor air to warm the indoor air. The warmed indoor air becomes warm air and is blown out from the blower fan 3a, heating the room.
一方、室内側熱交換器３で凝縮された液冷媒は
逆止弁４およびキヤピラリチユーブ６を経て室外
側熱交換器７に送られ、ここで周囲から熱を奪つ
て蒸発される。蒸発した冷媒は四方弁２を通つて
圧縮機１に還流され、１つの暖房サイクルが終了
する。 On the other hand, the liquid refrigerant condensed in the indoor heat exchanger 3 is sent to the outdoor heat exchanger 7 via the check valve 4 and the capillary tube 6, where it absorbs heat from the surroundings and is evaporated. The evaporated refrigerant is returned to the compressor 1 through the four-way valve 2, and one heating cycle is completed.
次に、外気温が高い春先等に暖房運転する場合
について述べる。 Next, a case will be described in which the heating operation is performed in early spring when the outside temperature is high.
この場合には、冷凍サイクル８の暖房負荷が小
さいので、第４図に示すように高温レリース制御
運転する。この高温レリース制御は、室内側熱交
換器３の凝縮温度Tcを温度センサ１０が検出し、
その検出温度が一定値以上のとき、マイクロコン
ピユータ９を作動させて、室外側熱交換器７のフ
アンモータ７ｂを停止させ、このフアンモータの
ON−OFFを周期的に反覆させることにより行な
われる。このフアンモータ７ｂのON−OFFによ
り、室外側送風フアン７ａの作動が周期的に停止
せしめられ、室外側熱交換器７での吸熱量（冷媒
蒸発量）が低下せしめられる。 In this case, since the heating load on the refrigeration cycle 8 is small, the high temperature release control operation is performed as shown in FIG. In this high temperature release control, the temperature sensor 10 detects the condensation temperature Tc of the indoor heat exchanger 3,
When the detected temperature is above a certain value, the microcomputer 9 is activated to stop the fan motor 7b of the outdoor heat exchanger 7.
This is done by periodically repeating ON-OFF. By turning the fan motor 7b ON and OFF, the operation of the outdoor blower fan 7a is periodically stopped, and the amount of heat absorbed (the amount of refrigerant evaporated) in the outdoor heat exchanger 7 is reduced.
室外側交換器７の吸熱量の低下により、室内側
熱交換器３での冷媒凝縮圧力が下げられ、凝縮能
力が低下し、冷凍サイクルの暖房負荷が小さくな
る。 As the amount of heat absorbed by the outdoor exchanger 7 decreases, the refrigerant condensing pressure in the indoor heat exchanger 3 decreases, the condensing capacity decreases, and the heating load of the refrigeration cycle decreases.
室外側熱交換器７の送風フアン７ａの作動停止
を繰り返すと、室外側熱交換器７の熱交換コイル
の表面温度Teが低下し、外気温度Toが高く（例
えば０℃以上）ても着霜してくる。室外側熱交換
器７の熱交換コイル面への着霜は室外側送風フア
ン７ａの作動停止の繰返しとともに次第に成長す
る。室外側熱交換器７の着霜が進行すると、霜に
よる室外側熱交換器７の目詰りが生じ、送風量が
低下する。このため、高温レリース制御運転が一
定時間継続されると、その運転時間が積算されて
除霜運転に入る。 When the blower fan 7a of the outdoor heat exchanger 7 is repeatedly stopped, the surface temperature Te of the heat exchange coil of the outdoor heat exchanger 7 decreases, and frost formation occurs even if the outside air temperature To is high (for example, 0°C or higher). I'll come. Frost on the heat exchange coil surface of the outdoor heat exchanger 7 gradually grows as the outdoor fan 7a is repeatedly stopped. As the frost formation on the outdoor heat exchanger 7 progresses, the outdoor heat exchanger 7 becomes clogged due to the frost, and the amount of air blown decreases. Therefore, when the high temperature release control operation continues for a certain period of time, the operation time is accumulated and the defrosting operation begins.
除霜運転に入ると、第４図に示すように、圧縮
機用リレーK1、室内側送風フアン３ａのフアン
モータ用リレーK2をOFFにして圧縮機１および
室内側送風フアン３ａの作動を停止させる。その
際、四方弁２および室外側送風フアン７ａは暖房
運転時の状態に維持され、四方弁２は暖房側（リ
レーK3はON状態）に、室外側送風フアン７ａは
作動状態に保たれる。 When the defrosting operation starts, as shown in Fig. 4, the compressor relay K 1 and the fan motor relay K 2 of the indoor blower fan 3a are turned off to stop the operation of the compressor 1 and the indoor blower fan 3a. make it stop. At this time, the four-way valve 2 and the outdoor blower fan 7a are maintained in the heating operation state, the four-way valve 2 is kept in the heating side (relay K 3 is in the ON state), and the outdoor blower fan 7a is kept in the operating state. .
しかして、室外側送風フアン７ａの作動によ
り、室外側熱交換器７に付着した霜を除霜する。
すなわち、外気温度が高い点に着目し、外気エン
タルピを積極的に利用して除霜を行なうものであ
る。このときには、冷凍サイクル８は暖房運転側
に、四方弁２によりセツトされており、逆サイク
ルにならないので、室温の急激な低下は確実に防
止され、高温レリース制御時に暖房効果を余り損
うことなく除霜することができる。 Thus, the frost adhering to the outdoor heat exchanger 7 is defrosted by the operation of the outdoor side blower fan 7a.
That is, focusing on the fact that the outside air temperature is high, defrosting is performed by actively utilizing the outside air enthalpy. At this time, the refrigeration cycle 8 is set to the heating operation side by the four-way valve 2, and the reverse cycle does not occur, so a sudden drop in room temperature is reliably prevented and the heating effect is not significantly impaired during high temperature release control. Can be defrosted.
なお、この発明の一実施例の説明においては、
室外側熱交換器の凝縮温度を検出して、外気温度
Toが高温（例えば０℃以上）のとき、高温レリ
ース制御運転を行なう場合について説明したが、
圧縮機に還流される冷媒の圧力を検出して冷凍サ
イクルの運転を制御する高圧レリース制御にも適
用することができる。 In addition, in the description of one embodiment of this invention,
Detects the condensation temperature of the outdoor heat exchanger and determines the outside air temperature.
We have explained the case where high temperature release control operation is performed when To is high temperature (for example, 0°C or higher).
It can also be applied to high-pressure release control that controls the operation of a refrigeration cycle by detecting the pressure of refrigerant that is returned to the compressor.
以上に述べたようにこの発明に係る冷凍サイク
ルの除霜運転制御方法においては、高温あるいは
高圧レリース制御運転時における除霜運転時にの
み、圧縮機を停止させ、かつ室外側熱交換器の送
風フアンを作動状態に維持したから、送風フアン
の作動によりエンタルピの高い外気を室外側熱交
換器の熱交換コイルに積極的に案内し、その外気
エンタルピにより熱交換コイル面に付着した霜を
有効的に取り除くことができる。
As described above, in the defrosting operation control method for a refrigeration cycle according to the present invention, the compressor is stopped only during the defrosting operation at high temperature or high pressure release control operation, and the blower fan of the outdoor heat exchanger is Since the air blower is maintained in the operating state, the outside air with high enthalpy is actively guided to the heat exchange coil of the outdoor heat exchanger by operating the ventilation fan, and the frost that has adhered to the heat exchange coil surface is effectively removed by the outside air enthalpy. can be removed.
また、この除霜運転は外気エンタルピを利用し
たものであるので、冷凍サイクルを反転させる必
要がなく、四方弁を暖房側にセツトしたままの状
態に維持することができ、暖房運転時の室温の急
激な低下を未然にかつ確実に防止することができ
る。 In addition, since this defrosting operation utilizes outside air enthalpy, there is no need to reverse the refrigeration cycle, and the four-way valve can be kept set to the heating side, so that the room temperature during heating operation can be maintained. A sudden drop can be prevented in advance and reliably.
また、高温（高圧）レリース制御時の除霜は、
外気エンタルピを利用したものであり、冷凍サイ
クルを反転除霜する必要がないので、反転除霜に
よる除霜運転の回数が大幅に減少し、かつその除
霜の際にから除霜を確実に防止することができ
る。 In addition, defrosting during high temperature (high pressure) release control is
Since it uses outside air enthalpy and there is no need to defrost the refrigeration cycle in reverse, the number of defrost operations due to reverse defrost is greatly reduced, and it reliably prevents defrosting during defrosting. can do.
第１図は従来の冷凍サイクルの除霜運転制御方
法を示すグラフ、第２図は冷暖房用空気調和機に
組み込まれる冷凍サイクルの構成図、第３図は上
記冷凍サイクルに組み込まれる電気回路の一例を
示す図、第４図はこの発明に係る冷凍サイクルの
除霜運転制御方法の一実施例を示すグラフであ
る。
１……圧縮機、２……四方弁、３……室内側熱
交換器、３ａ……室内側送風フアン、３ｂ……フ
アンモータ、７……室外側熱交換器、７ａ……室
外側送風フアン、７ｂ……フアンモータ、８……
冷凍サイクル、９……マイクロコンピユータ、１
０……温度センサ、K1〜K4……リレー。
Figure 1 is a graph showing a conventional defrosting operation control method for a refrigeration cycle, Figure 2 is a configuration diagram of a refrigeration cycle incorporated in an air conditioner for heating and cooling, and Figure 3 is an example of an electric circuit incorporated in the refrigeration cycle. FIG. 4 is a graph showing an embodiment of the defrosting operation control method for a refrigeration cycle according to the present invention. 1...Compressor, 2...Four-way valve, 3...Indoor heat exchanger, 3a...Indoor blower fan, 3b...Fan motor, 7...Outdoor heat exchanger, 7a...Outdoor air blower Fan, 7b...Fan motor, 8...
Refrigeration cycle, 9...Microcomputer, 1
0...Temperature sensor, K1 to K4 ...Relay.
Claims (1)
側熱交換器等を順次接続して構成された冷凍サイ
クルの暖房運転時に、外気温度が所定温度以上の
とき、高温あるいは高圧レリース制御運転して前
記室外側熱交換器の送風フアンの作動・停止を繰
り返し、上記送風フアンの作動・停止の積算時間
が一定値に達したとき除霜運転を行なう冷凍サイ
クルの除霜運転制御方法において、上記除霜運転
時にのみ、圧縮機を停止させ、かつ室外側熱交換
器の送風フアンを作動状態に維持することを特徴
とする冷凍サイクルの除霜運転制御方法。 ２ 除霜運転時には四方弁を暖房側のセツト状態
に維持する特許請求の範囲第１項に記載の冷凍サ
イクルの除霜運転制御方法。[Claims] 1. During heating operation of a refrigeration cycle configured by sequentially connecting a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, etc., when the outside air temperature is higher than a predetermined temperature, high temperature Alternatively, the defrosting of the refrigeration cycle is performed by performing high-pressure release control operation to repeatedly operate and stop the blower fan of the outdoor heat exchanger, and perform defrosting operation when the cumulative time of actuation and stoppage of the blower fan reaches a certain value. A defrosting operation control method for a refrigeration cycle, characterized in that the compressor is stopped and a blower fan of an outdoor heat exchanger is maintained in an operating state only during the defrosting operation. 2. The defrosting operation control method for a refrigeration cycle according to claim 1, wherein the four-way valve is maintained in the heating side set state during the defrosting operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58069179A JPS59195045A (en) | 1983-04-21 | 1983-04-21 | Control method of defrosting operation of refrigeration cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58069179A JPS59195045A (en) | 1983-04-21 | 1983-04-21 | Control method of defrosting operation of refrigeration cycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59195045A JPS59195045A (en) | 1984-11-06 |
| JPH0230420B2 true JPH0230420B2 (en) | 1990-07-06 |
Family
ID=13395233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58069179A Granted JPS59195045A (en) | 1983-04-21 | 1983-04-21 | Control method of defrosting operation of refrigeration cycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59195045A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0490836U (en) * | 1990-12-19 | 1992-08-07 | ||
| CN102159901B (en) * | 2008-09-16 | 2013-07-24 | 松下电器产业株式会社 | air conditioner |
| EP2757327B1 (en) * | 2011-09-13 | 2016-08-17 | Mitsubishi Electric Corporation | Refrigeration and air-conditioning device |
| WO2013038439A1 (en) * | 2011-09-13 | 2013-03-21 | 三菱電機株式会社 | Refrigeration and air-conditioning device |
| CN102677439B (en) * | 2012-04-27 | 2016-12-14 | 青岛海尔滚筒洗衣机有限公司 | A kind of control method removing heat pump clothes dryer evaporimeter frosting and heat pump clothes dryer |
| CN103017428B (en) * | 2013-01-10 | 2016-01-13 | 合肥美的电冰箱有限公司 | Refrigerator and refrigerating system thereof |
-
1983
- 1983-04-21 JP JP58069179A patent/JPS59195045A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59195045A (en) | 1984-11-06 |
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