JPS63123941A - Defrosting operation control method for airconditioner - Google Patents
Defrosting operation control method for airconditionerInfo
- Publication number
- JPS63123941A JPS63123941A JP61265500A JP26550086A JPS63123941A JP S63123941 A JPS63123941 A JP S63123941A JP 61265500 A JP61265500 A JP 61265500A JP 26550086 A JP26550086 A JP 26550086A JP S63123941 A JPS63123941 A JP S63123941A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heat exchanger
- indoor
- defrosting
- detected
- 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 24
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000004904 shortening Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 230000008014 freezing Effects 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 27
- 230000007423 decrease Effects 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 206010028813 Nausea Diseases 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000008693 nausea Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は空気調和機の除霜運転制御方法に係り、特に暖
房運転時に好適な室外側熱交換器の着霜検出方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a defrosting operation control method for an air conditioner, and particularly to a method for detecting frost formation on an outdoor heat exchanger suitable for heating operation.
従来の空気調和機を外気温の低い条件下で暖房運転する
と室外側熱交換器に着霜を生じ、通風抵抗が徐々に大き
くなり、室外側送風機の回転数が一低下し風量か減少す
る。すると熱交換量が減少するため室内側の吐出空気が
低下し、不快感を与える。そのためデフロストサーモス
タットで室外側熱交換器の温度を検知し、除霜をしてい
た。When a conventional air conditioner is operated for heating under conditions of low outside temperature, frost forms on the outdoor heat exchanger, ventilation resistance gradually increases, the rotational speed of the outdoor fan decreases, and the air volume decreases. As a result, the amount of heat exchanged decreases, and the amount of air discharged indoors decreases, causing discomfort. Therefore, a defrost thermostat was used to detect the temperature of the outdoor heat exchanger and defrost it.
また、前記デフロストサーモスタットだけで除霜運転の
制御を行なわせると、頻繁に除霜を行ない暖房運転率が
低下してしまうので、従来はタイマーに依って一定時間
に１度だけ除霜運転を行なつ様、デフロストサーモスタ
ットとタイマーノ併用により除霜運転の制御をしていた
。Additionally, if the defrost thermostat were used to control the defrost operation only, defrosting would be performed frequently and the heating operation rate would drop. Natsu-sama, the defrost operation was controlled by a combination of the defrost thermostat and timer.
また、室外側か強風下で運転を行なうと、除霜運転に依
り室外側熱交換器の除霜か完了していても、デフロスト
サーモの温度か上昇せずに、暖房運転に復帰しないとい
う弊害もあって、除霜運転の最長時間を決めておく事が
一般的に行なわれている。Additionally, if the operation is performed outdoors or under strong winds, even if the defrost operation has completed defrosting the outdoor heat exchanger, the temperature of the defrost thermometer will not rise and heating operation will not resume. For this reason, it is common practice to set a maximum time for defrosting operation.
尚、この種の技術として関連するものには例えば実公昭
５９−３３１１号公報、特開昭５９−５２１６２号等か
挙げられる。Incidentally, related techniques of this type include, for example, Japanese Utility Model Publication No. 59-3311 and Japanese Unexamined Patent Publication No. 59-52162.
上記従来技術は、定期的に除霜運転を行なっているが降
雪地帯など、特に着霜が多い場合には室外側送風機の風
量か減少することから、室外側熱交換器の蒸発温度かさ
らに低下し、益々着霜か促進される。これに伴ない暖房
能力も最大能力が徐々に低下するため、室内吐出空気温
度も低下してくる。このような状態で定期的に除霜運転
を行なうと、次の除霜運転に至るまでに室内吐出空気温
度の低い状態か長くなって暖房能力か不足したり除霜運
転時間か長くなったり、完全に解けきらないうちに強制
復帰され、残霜になることがある。In the above conventional technology, defrosting operation is carried out regularly, but in snowy regions and other areas where there is a lot of frost, the air volume of the outdoor fan decreases, which further reduces the evaporation temperature of the outdoor heat exchanger. However, frost formation is further promoted. As a result, the maximum heating capacity gradually decreases, and the indoor discharge air temperature also decreases. If defrosting operation is performed regularly under such conditions, the indoor discharge air temperature may be low or long before the next defrosting operation, resulting in insufficient heating capacity or longer defrosting operation time. It may be forced to return before it completely thaws, resulting in residual frost.
残霜がある場合は、暖房運転を再開始しても、暖房能力
を最大限に発揮できず、室内吐出空気温度の低下が著し
く、平均暖房能力が低下し快適性を損うおそれかあった
。すなわち、上記従来の暖房運転では、熱交換器の着霜
開始から除霜運転までの着霜状態における室内温度の低
下については配慮かされておらず、室内温度か低下して
も所定の時間が経過しないと霜取りをしないことから、
平均暖房能力か低下する問題かあった。If there is residual frost, even if the heating operation is restarted, the heating capacity cannot be maximized, and the indoor discharge air temperature will drop significantly, reducing the average heating capacity and potentially impairing comfort. . In other words, in the conventional heating operation described above, no consideration is given to the decrease in the indoor temperature during the frosting state from the start of frosting of the heat exchanger to the defrosting operation, and even if the indoor temperature decreases, the predetermined time Because it does not defrost until the time has elapsed,
There was a problem with the average heating capacity decreasing.
上記目的は、暖房運転において室外側熱交換器に着霜が
生じ室内吐出空気温度の低下を防止するために、室内吐
出空気温度と室内熱交換器のどちらか一方の単位時間当
りの温度低下を検出し、この検出値か、設定された単位
時間当りの温度低下の値よりも大さくなった時に除霜終
了から除霜開始するまでの除霜禁止間隔を短かくするこ
とにより、達成される。The above purpose is to reduce the temperature drop per unit time of either the indoor discharge air temperature or the indoor heat exchanger in order to prevent frost formation on the outdoor heat exchanger and a drop in the indoor discharge air temperature during heating operation. This is achieved by shortening the defrost prohibition interval from the end of defrosting to the start of defrosting when the detected value is greater than the set value of temperature drop per unit time. .
室外側熱交換器の着霜は外気温度か低く、かつ冷凍サイ
クル内の冷媒の蒸発温度か低い時に生じるため、室外側
熱交換器温度及び室内吐出空気と室内熱交換器の単位時
間当りの温度低下を検出する検出手段により着霜温度を
感知し、除霜させるので除霜に要する時間が短か（室内
の温度低下の変化か少ない。Frost formation on the outdoor heat exchanger occurs when the outside air temperature is low and the evaporation temperature of the refrigerant in the refrigeration cycle is low. Since the frost forming temperature is sensed by the detection means that detects the drop and defrosting is performed, the time required for defrosting is short (changes in indoor temperature drop are small).
以下、本発明の一実施例を第１図、第２図により説明す
る。第２図に示すような圧縮機ｌ、四方弁２、室内側熱
交換器３、膨張弁４、室外側熱交換器５等から成る冷凍
サイクルにおいて、暖房運転時は実線矢印の如く冷暖か
流れる。また、６は室内側送風機、７は室外側送風機で
各々熱交換を行う。室内側熱交換器３を通って吐出され
た空気かあたるように具備された室内側吐出空気温度セ
ンサー８と室内側熱交換器３の入口側または出口側のパ
イプの温度を検知できるように室内側熱交換器温度セン
サー９か具備されている。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In a refrigeration cycle consisting of a compressor 1, a four-way valve 2, an indoor heat exchanger 3, an expansion valve 4, an outdoor heat exchanger 5, etc. as shown in Fig. 2, during heating operation, cold and hot flows as shown by the solid arrows. . Further, 6 is an indoor side blower, and 7 is an outdoor side blower, respectively, for heat exchange. An indoor discharge air temperature sensor 8 is provided so that the air discharged through the indoor heat exchanger 3 comes into contact with the indoor air discharge air temperature sensor 8, and an indoor air temperature sensor 8 is installed so that the temperature of the pipe on the inlet side or the outlet side of the indoor heat exchanger 3 can be detected. An inner heat exchanger temperature sensor 9 is provided.
上記のような構成において暖房運転をすると圧縮機ｌ、
室内側送風機６、室外側送風機７の運転か開始される。When heating operation is performed in the above configuration, the compressor l,
The operation of the indoor side blower 6 and the outdoor side blower 7 is started.
外気温度か低い条件下では、やがて室外側熱交換器５に
着霜が始まる。着霜か生じれば室外側熱交換器５の通風
抵抗か増加し熱交換量か減少し、暖房能力か低下する。Under conditions where the outside air temperature is low, frost will eventually begin to form on the outdoor heat exchanger 5. If frost occurs, the ventilation resistance of the outdoor heat exchanger 5 increases, the amount of heat exchange decreases, and the heating capacity decreases.
すると室内吐出空気温度か下り、室内側吐出空気温度セ
ンサー８が検知しマイコン等の制御手段により除霜か開
始される。また、ヒーターか組込まれている場合は室内
側熱交換器３の温度が下っても吐出空気温度に目立って
変化しない時かある。その時は室内側熱交換器温度セン
サー９か検知しマイコン等の制御手段により除霜か開始
される。どちらか一方か検知した場合に限るが、設定し
た時間外の場合は通常の設定された時間か経過しないと
除霜か開始されないようになっている。第２図は上記の
変化を表わした暖房能力曲線である。実線は、室内側吐
出空気温度センサー８または室内側熱交換器温度センサ
ー９が検知しなかった場合を表わし、破線は検知した場
合を表わす。すなわち、室外側熱交換器５への着霜量が
異常に多かったり、降雪した雪か室外側熱交換器５に付
着した場合は、破線の如（、Ｔｌの短かい暖房運転時間
で霜取りを行なう事に依って従来の実線で示すＴ２時間
の暖房運転に比べて、総合する暖房能力を大さくするこ
とができる。また、室外側熱交換器５への着霜量が一般
的な場合は２点鎖線で示す様な、高い暖房能力を維持す
るので、室内側吐出空気温度も、室内側熱交換器３の温
度も低下しないため、Ｔ２時間を除霜禁止時間とする。Then, the indoor discharge air temperature drops, the indoor discharge air temperature sensor 8 detects this, and defrosting is started by a control means such as a microcomputer. Furthermore, if a heater is installed, there may be cases where the temperature of the discharged air does not noticeably change even if the temperature of the indoor heat exchanger 3 drops. At that time, the indoor heat exchanger temperature sensor 9 detects the temperature and defrosting is started by a control means such as a microcomputer. This is limited to when either one is detected, but if it is outside the set time, defrosting will not start until the normal set time has elapsed. FIG. 2 is a heating capacity curve showing the above changes. The solid line represents the case where the indoor discharge air temperature sensor 8 or the indoor heat exchanger temperature sensor 9 does not detect the temperature, and the broken line represents the case where the temperature is detected. In other words, if the amount of frost on the outdoor heat exchanger 5 is abnormally large, or if snow has fallen and adhered to the outdoor heat exchanger 5, defrost should be removed with a short heating operation time of Tl as shown by the broken line. By doing this, the overall heating capacity can be increased compared to the conventional heating operation for T2 hours shown by the solid line.Also, if the amount of frost on the outdoor heat exchanger 5 is normal, Since the high heating capacity as shown by the two-dot chain line is maintained, neither the temperature of the indoor discharge air nor the temperature of the indoor heat exchanger 3 decreases, so time T2 is set as the defrosting prohibition time.
本発明によれば、外気温度の低い条件下における暖房運
転において、室外側熱交換器に着霜が始まり暖房能力か
低下した場合、該暖房能力か著し速いので暖房能力の変
化か少なく、暖房運転の快適性の向上にもつながるもの
である。According to the present invention, during heating operation under conditions of low outside air temperature, when frost begins to form on the outdoor heat exchanger and the heating capacity decreases, since the heating capacity increases extremely quickly, there is little change in the heating capacity, and the heating capacity decreases. This also leads to improved driving comfort.
また、着霜が余り多（ない場合は、除霜禁止時間を長く
して、大きな暖房能力を維持する時間を伸ばして有効な
、ヒートポンプ式空気調和機を得ることかできる。In addition, if there is too much frost (or no frost), the defrosting prohibition time can be extended to extend the time during which a large heating capacity is maintained, resulting in an effective heat pump air conditioner.
第１図は本発明における暖房能力曲線、第２図は本発明
の冷凍サイクル構成図である。
１・・・圧縮機、２・・・四方弁、３・・・室内側熱交
換器、４・・・膨張弁、５・・・室外側熱交換器、６・
・・室内側送風機、７・・・室外側熱交換器、８・・・
室内側吐出空気ｇＪ］
一運転日今驕
３、 室内６買Ｉ淋ｅＡ器
Ｓ、” ｔｖＶ別へや艶（１
’Ｔ−２１！］’・望内便１吐気９九
五昌ｕ１セ′ンサーFIG. 1 is a heating capacity curve according to the present invention, and FIG. 2 is a configuration diagram of a refrigeration cycle according to the present invention. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Four-way valve, 3... Indoor heat exchanger, 4... Expansion valve, 5... Outdoor heat exchanger, 6...
...Indoor blower, 7...Outdoor heat exchanger, 8...
Indoor discharge air gJ] 1 driving day 3, indoor 6 buying I 淋 eA device S, ``tvV another heya luster (1 'T-21!]', 1 working day 1 nausea 995 sho u1 se' server
Claims (1)
器温度を検出する工程と、前記検出値と設定された単位
時間当りの温度低下の値とを比較する工程と、前記検出
値が前記設定された値よりも大きくなった時に除霜禁止
間隔を短かくする工程とから成ることを特徴とする空気
調和機の除霜運転制御方法。1. A step of detecting the discharge air temperature of the indoor unit or the temperature of the indoor heat exchanger, a step of comparing the detected value with a set value of temperature drop per unit time, and a step of comparing the detected value with the set value of the temperature drop per unit time. A defrosting operation control method for an air conditioner, comprising the step of: shortening a defrosting prohibition interval when the defrosting prohibition interval becomes larger than a set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61265500A JPS63123941A (en) | 1986-11-10 | 1986-11-10 | Defrosting operation control method for airconditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61265500A JPS63123941A (en) | 1986-11-10 | 1986-11-10 | Defrosting operation control method for airconditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63123941A true JPS63123941A (en) | 1988-05-27 |
Family
ID=17418036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61265500A Pending JPS63123941A (en) | 1986-11-10 | 1986-11-10 | Defrosting operation control method for airconditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63123941A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013171971A1 (en) * | 2012-05-16 | 2013-11-21 | パナソニック株式会社 | Heating system control method and heating system |
| EP3339761A4 (en) * | 2015-08-18 | 2018-08-08 | Daikin Industries, Ltd. | Refrigeration device |
-
1986
- 1986-11-10 JP JP61265500A patent/JPS63123941A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013171971A1 (en) * | 2012-05-16 | 2013-11-21 | パナソニック株式会社 | Heating system control method and heating system |
| JP5820998B2 (en) * | 2012-05-16 | 2015-11-24 | パナソニックＩｐマネジメント株式会社 | Heating system control method and heating system |
| EP3339761A4 (en) * | 2015-08-18 | 2018-08-08 | Daikin Industries, Ltd. | Refrigeration device |
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