JP2776978B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2776978B2 JP2776978B2 JP2322748A JP32274890A JP2776978B2 JP 2776978 B2 JP2776978 B2 JP 2776978B2 JP 2322748 A JP2322748 A JP 2322748A JP 32274890 A JP32274890 A JP 32274890A JP 2776978 B2 JP2776978 B2 JP 2776978B2
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- temperature
- time
- heat exchanger
- heat storage
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、空気調和機のデフロスト及びデフロスト前
の圧縮機蓄熱運転時間の短縮化を行なう手段に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a means for performing defrosting of an air conditioner and shortening a compressor heat storage operation time before defrosting.
従来の装置は、実開昭59-54062号公報に記載のよう
に、電動膨張弁を使用した冷凍サイクルにおいて、暖房
運転からデフロスト運転に切換わるとき、そのデフロス
ト運転に入る直前の暖房運転の一定時間、暖房運転の絞
り開度より小に絞り開度制御して圧縮機の蓄熱量の増加
を図っている制御となっていた。As described in Japanese Unexamined Utility Model Publication No. 59-54062, in a conventional refrigeration cycle using an electric expansion valve, when switching from heating operation to defrost operation, the heating operation is performed just before the defrost operation is started. The control is such that the amount of heat stored in the compressor is increased by controlling the opening degree of the compressor to be smaller than the opening degree of the heating operation during the time.
上記のデフロスト方式においては、圧縮機蓄熱運転中
に電動膨張弁により、圧縮機の温度を高め蓄熱量増加制
御を実施しているが、実際は、一定時間蓄熱運転を行な
うため最初は圧縮機温度が上昇し、圧縮機蓄熱量は、増
加するが圧縮機過負荷保護用の圧縮機温度に到達し、保
護機能が働くためあるピーク値をもって減少することが
多い。このように蓄熱運転は、時間制限で行なっている
ので、必ずしも圧縮機蓄熱量が最大時にデフロストを実
施するとは限らないという問題があった。デフロストに
は圧縮機蓄熱量を使用するため、圧縮機蓄熱量が最大で
ないデフロスト時間も最短にならず又、必要以上に蓄熱
運転を実施し、暖房能力を損なうという問題があった。In the above-described defrost method, the temperature of the compressor is increased by the electric expansion valve during the heat storage operation of the compressor to perform the heat storage amount increase control. The temperature rises and the amount of heat stored in the compressor increases, but often reaches a compressor temperature for compressor overload protection and decreases with a certain peak value for the protection function to operate. As described above, since the heat storage operation is performed for a limited time, there is a problem that the defrost is not always performed when the amount of heat stored in the compressor is maximum. Since the amount of heat stored in the compressor is used for defrosting, there is a problem that the defrost time when the amount of heat stored in the compressor is not the maximum is not minimized, and the heat storage operation is performed more than necessary, thereby deteriorating the heating capacity.
本発明は、上記欠点を補い、デフロスト時間及び蓄熱
運転時間を短縮化し、暖房能力の減少を防止することを
目的とする。An object of the present invention is to compensate for the above-mentioned drawbacks, shorten the defrost time and the heat storage operation time, and prevent a decrease in heating capacity.
上記目的を達成するために、本願発明は、圧縮機、室
内熱交換器、減圧手段、室外熱交換器とを順に接続した
冷凍サイクルを有し、前記室外熱交換器の除霜要求があ
ったとき、前記室内熱交換器用ファンを停止して前記圧
縮機を動作させて蓄熱運転を行い、この蓄熱運転の終了
後に前記減圧手段の減圧機構を解除して前記室外熱交換
器の霜を除去する除霜運転を行なう空気調和機におい
て、前記圧縮機の温度を検出する手段と、前記蓄熱運転
の設定運転時間を計時する計時手段と、前記圧縮機の温
度が設定値となったとき、または前記計時手段が設定時
間を経過したとき、前記減圧手段の減圧機構を解除する
手段とを備えろことにより達成される。In order to achieve the above object, the present invention has a refrigeration cycle in which a compressor, an indoor heat exchanger, a decompression unit, and an outdoor heat exchanger are sequentially connected, and there is a request for defrosting the outdoor heat exchanger. When the indoor heat exchanger fan is stopped, the compressor is operated to perform the heat storage operation, and after the heat storage operation is completed, the pressure reducing mechanism of the pressure reducing means is released to remove frost from the outdoor heat exchanger. In an air conditioner performing a defrosting operation, a means for detecting a temperature of the compressor, a timer for measuring a set operation time of the heat storage operation, and when the temperature of the compressor reaches a set value, or Means for canceling the pressure reducing mechanism of the pressure reducing means when the set time has elapsed by the time measuring means.
圧縮機の温度検出手段により、蓄熱運転中の圧縮機温
度をリアルタイムで測定し、あらかじめ設定した温度と
比較し、設定温度以上であれば、デフロストサイクル運
転を開始するものである。また設定温度に達しない場合
は最長蓄熱時間経過後デフロストサイクル運転を開始す
るものである。The compressor temperature detection means measures the compressor temperature during the heat storage operation in real time, compares it with a preset temperature, and starts the defrost cycle operation if the temperature is equal to or higher than the set temperature. If the set temperature is not reached, the defrost cycle operation is started after the elapse of the longest heat storage time.
またデフロストサイクル運転に切換える圧縮機温度の
設定値は、冷房や暖房サイクル運転時の圧縮機保護用の
圧縮機温度設定値より、高く設定することにより、蓄熱
量が増大し、デフロスト時間の短縮が実現可能であり、
また、この高めの圧縮機温度設定値も、最長蓄熱時間
内、運転されても、圧縮機信頼性が確保される温度以内
に設定されているため、圧縮機の信頼性を損なうことも
ない。Also, by setting the set value of the compressor temperature for switching to the defrost cycle operation higher than the set value of the compressor temperature for protecting the compressor during the cooling or heating cycle operation, the heat storage amount increases and the defrost time is shortened. Feasible,
In addition, even when the compressor is operated within the longest heat storage time, the higher compressor temperature set value is set within a temperature at which the compressor reliability is ensured, so that the reliability of the compressor is not impaired.
以下、本発明の一実施例を第１図，第２図及び第３図
により説明する。第１図は本発明の動作図を示したもの
であり、第２図はその動作を行なうブロック構成図であ
る。又、第３図は動作を説明したフロー図である。An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3. FIG. 1 is a diagram showing the operation of the present invention, and FIG. 2 is a block diagram showing the operation thereof. FIG. 3 is a flowchart for explaining the operation.
まず、第２図のブロック図により実施例の構成を説明
する。空気調和機は、室内制御部１と室外制御部４によ
り運転制御を行なっており、各々その制御中枢にマイコ
ン2,マイコン５を持っている。そして、この２つは互い
に制御信号で連結している。室内制御部１は、室内熱交
換器送風用の室内ファンモータ４を制御する。室外制御
部４は、圧縮機温度検出手段９、室外熱交換器温度検出
手段10及び室内制御部からの入力信号より、圧縮機６、
冷凍サイクルの冷媒循環量の制御を行う電動膨張弁７、
及び室外熱交換器送風用の室外ファンモータ８を各々制
御している。次に第１図及び第２図により、本実施例の
動作を説明する。First, the configuration of the embodiment will be described with reference to the block diagram of FIG. The operation of the air conditioner is controlled by an indoor control unit 1 and an outdoor control unit 4, and each of the air conditioners has a microcomputer 2 and a microcomputer 5 at its control center. The two are connected to each other by a control signal. The indoor control unit 1 controls the indoor fan motor 4 for blowing the indoor heat exchanger. The outdoor control unit 4 receives signals from the compressor temperature detecting means 9, the outdoor heat exchanger temperature detecting means 10 and the input signals from the indoor control unit,
An electric expansion valve 7 for controlling the refrigerant circulation amount of the refrigeration cycle,
And an outdoor fan motor 8 for blowing the outdoor heat exchanger. Next, the operation of this embodiment will be described with reference to FIGS.
通常の暖房サイクル運転において、室外熱交換器に着
霜が起こると、着霜の成長により室外熱交換器の温度が
低下する。この温度を検出する室外熱交換器温度検出手
段10の信号は、室外制御部４のマイコン５に入力し、室
内制御部１のマイコン２に伝送される。室内マイコン２
において、デフロスト運転判定処理を行ない、デフロス
ト運転成立時は、室内マイコン２より室外マイコン５に
デフロスト開始信号が伝送される。このデフロスト開始
信号により、室外マイコン５は、圧縮機の蓄熱運転を始
める。蓄熱運転は、圧縮機の蓄熱量を増加させるため、
圧縮機６の回転数を最大にし、電動膨張弁７は、流量抵
抗が増加する様に制限されるのである。これにより圧縮
機吐出圧力が上がり、圧縮機温度が上昇し、圧縮機の蓄
熱量が増大してゆくのである。この圧縮機温度を圧縮機
温度検出手段９でリアルタイムに測定し、この測定値を
マイコン５に入力し、あらかじめ設定された設定値T2と
比較され、設定値以上であれば、デフロストサイクル運
転に切り換わるのである。In a normal heating cycle operation, when frost forms on the outdoor heat exchanger, the temperature of the outdoor heat exchanger decreases due to the growth of frost. The signal of the outdoor heat exchanger temperature detecting means 10 for detecting this temperature is input to the microcomputer 5 of the outdoor control unit 4 and transmitted to the microcomputer 2 of the indoor control unit 1. Indoor microcomputer 2
, A defrost operation determination process is performed. When the defrost operation is established, a defrost start signal is transmitted from the indoor microcomputer 2 to the outdoor microcomputer 5. In response to the defrost start signal, the outdoor microcomputer 5 starts the heat storage operation of the compressor. Heat storage operation increases the amount of heat stored in the compressor,
The rotation speed of the compressor 6 is maximized, and the electric expansion valve 7 is limited so that the flow resistance increases. As a result, the compressor discharge pressure increases, the compressor temperature increases, and the heat storage amount of the compressor increases. This compressor temperature is measured in real time by the compressor temperature detecting means 9 and the measured value is inputted to the microcomputer 5 and compared with a preset set value T2. It is replaced.
また、マイコン５は、蓄熱運転開始時よりタイマー動
作を開始し、あらかじめ設定された最長蓄熱時間経過後
も、圧縮機温度が設定温度に到達していない場合は、時
間制限により、デフロストサイクル運転に切り換わるも
のである。また圧縮機温度の設定値は、デフロストサイ
クルへの切り換え温度Ｔ2を冷房や暖房サイクル運転時
の過負荷時の圧縮機保護用の温度Ｔ1より高めに設定す
ることにより、蓄熱量の増大を図り、デフロスト時間の
短縮が可能である。Further, the microcomputer 5 starts the timer operation from the start of the heat storage operation. If the compressor temperature has not reached the set temperature even after the elapse of the preset maximum heat storage time, the microcomputer 5 switches to the defrost cycle operation due to the time limit. It switches. The set value of the compressor temperature, by setting the switching temperature T 2 to defrost cycles for cooling or higher than the temperature T 1 of the compressor protection overload in the heating cycle operation, an increase in the heat storage amount As a result, the defrost time can be reduced.
本発明によれば、デフロスト時間と圧縮機蓄熱運転時
間の最短化を図ることにより、暖房能力低下の防止、及
び、消費電力節約を実施できる。According to the present invention, by minimizing the defrost time and the compressor heat storage operation time, it is possible to prevent a decrease in heating capacity and to save power consumption.
第１図は本発明の一実施例による状態を模式的に表現し
た状態図、第２図はそのブロック図、第３図は第２図の
動作を説明するフロー図である。 ４……室外制御部、６……圧縮機、９……圧縮機温度検
出器。FIG. 1 is a state diagram schematically showing a state according to an embodiment of the present invention, FIG. 2 is a block diagram thereof, and FIG. 3 is a flow chart for explaining the operation of FIG. 4 ... outdoor control unit, 6 ... compressor, 9 ... compressor temperature detector.
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F24F 11/02 101 F25B 47/02 570Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) F24F 11/02 101 F25B 47/02 570
Claims (1)
交換器とを順に接続した冷凍サイクルを有し、前記室外
熱交換器の除霜要求があったとき、前記室内熱交換器用
ファンを停止して前記圧縮機を動作させて畜熱運転を行
い、この蓄熱運転の終了後に前記減圧手段の減圧機構を
解除して前記室外熱交換器の霜を除去する除霜運転を行
なう空気調和機において、前記圧縮機の温度を検出する
手段と、前記蓄熱運転の設定運転時間を計時する計時手
段と、前記圧縮機の温度が設定値となったとき、または
前記計時手段が設定時間を経過したとき、前記減圧手段
の減圧機構を解除する手段とを備えた空気調和機。1. A refrigeration cycle in which a compressor, an indoor heat exchanger, a pressure reducing means, and an outdoor heat exchanger are connected in order, and when a request for defrosting of the outdoor heat exchanger is made, the refrigeration cycle is used for the indoor heat exchanger. The fan is stopped to operate the compressor to perform the heat storage operation. After the heat storage operation is completed, the air for performing the defrosting operation for releasing the defrosting mechanism of the outdoor heat exchanger by releasing the pressure reducing mechanism of the pressure reducing means. In the harmony device, means for detecting the temperature of the compressor, time-measuring means for measuring a set operation time of the heat storage operation, and when the temperature of the compressor reaches a set value, or the time-measuring means sets the set time. Means for releasing the pressure reducing mechanism of the pressure reducing means when the time has elapsed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2322748A JP2776978B2 (en) | 1990-11-28 | 1990-11-28 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2322748A JP2776978B2 (en) | 1990-11-28 | 1990-11-28 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04194539A JPH04194539A (en) | 1992-07-14 |
| JP2776978B2 true JP2776978B2 (en) | 1998-07-16 |
Family
ID=18147201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2322748A Expired - Fee Related JP2776978B2 (en) | 1990-11-28 | 1990-11-28 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2776978B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2141230T3 (en) * | 1993-04-28 | 2000-03-16 | Daikin Ind Ltd | OPERATING CONTROL DEVICE FOR AIR CONDITIONER. |
| JPH07120121A (en) * | 1993-10-29 | 1995-05-12 | Daikin Ind Ltd | Drive controller for air conditioner |
| CN100455955C (en) * | 2005-06-28 | 2009-01-28 | 乐金电子(天津)电器有限公司 | Method for controlling central air conditioner electromagnetic expanding valve |
| JP4973339B2 (en) * | 2007-06-29 | 2012-07-11 | パナソニック株式会社 | Operation control method of air conditioner |
| JP5634682B2 (en) * | 2009-04-24 | 2014-12-03 | 日立アプライアンス株式会社 | Air conditioner |
| JP5053430B2 (en) * | 2010-10-05 | 2012-10-17 | シャープ株式会社 | Air conditioner |
| JP6402661B2 (en) * | 2015-03-20 | 2018-10-10 | ダイキン工業株式会社 | Refrigeration equipment |
| US11181308B2 (en) * | 2018-03-06 | 2021-11-23 | Mitsubishi Electric Corporation | Air-conditioner that prevents degradation in heating capability during defrosting operation |
| JP7315059B1 (en) * | 2022-03-29 | 2023-07-26 | 株式会社富士通ゼネラル | air conditioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6315021A (en) * | 1986-07-04 | 1988-01-22 | Hitachi Ltd | Defrosting method of air conditioner |
| JPS6358048A (en) * | 1986-08-27 | 1988-03-12 | Daikin Ind Ltd | Defroster in air conditioner |
-
1990
- 1990-11-28 JP JP2322748A patent/JP2776978B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04194539A (en) | 1992-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees | ||
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
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