JPH0343551B2 - - Google Patents
Info
- Publication number
- JPH0343551B2 JPH0343551B2 JP59036666A JP3666684A JPH0343551B2 JP H0343551 B2 JPH0343551 B2 JP H0343551B2 JP 59036666 A JP59036666 A JP 59036666A JP 3666684 A JP3666684 A JP 3666684A JP H0343551 B2 JPH0343551 B2 JP H0343551B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heat exchanger
- compressor
- outdoor
- outdoor heat
- 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 21
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 19
- 230000007423 decrease Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ヒートポンプ式空気調和機における
暖房運転時の除霜運転制御装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a defrosting operation control device during heating operation in a heat pump type air conditioner.
従来例の構成とその問題点
従来よりヒートポンプ式空気調和機の室外熱交
換器は、暖房運転時に蒸発器となり、その運転条
件によつては霜が付着する。その霜が増大すると
室外熱交換器の通過風量が減少し、そのため外気
からの吸熱量が減少し、暖房能力が低下してしま
う。Conventional Structure and Problems Conventionally, the outdoor heat exchanger of a heat pump type air conditioner functions as an evaporator during heating operation, and depending on the operating conditions, frost may adhere to the outdoor heat exchanger. As the frost increases, the amount of air passing through the outdoor heat exchanger decreases, resulting in a decrease in the amount of heat absorbed from the outside air and a decrease in heating capacity.
そのために、除霜を行なうのであるが、一般に
従来のヒートポンプ式空気調和機では、室外熱交
換器温度により、着霜量の大小を判断していた。
すなわち、室外熱交換器温度が低くなればなるほ
ど着霜量が増大するという考えに基づき、室外熱
交換器温度がある一定温度T0以下になつたら、
除霜運転モードとし、霜を融解させ、暖房能力を
回復させていた。 For this purpose, defrosting is performed, but in general, in conventional heat pump type air conditioners, the amount of frost formation is determined based on the outdoor heat exchanger temperature.
In other words, based on the idea that the lower the outdoor heat exchanger temperature, the more the amount of frost formation increases, when the outdoor heat exchanger temperature falls below a certain temperature T 0 ,
It was set to defrost mode to melt the frost and restore heating capacity.
しかしながら、室外熱交換器の温度低下が限ず
しも着霜量の増大と対応するものではない。第１
図に示されるように、圧縮機の起動時、あるいは
室外送風機が過負荷保護のため一時的に停止した
場合などにおいては、室外熱交換器に霜が付着し
ていないにもかかわらず、室外熱交換器温度が所
定温度T0以下になつているため除霜運転となつ
てしまう。 However, a decrease in the temperature of the outdoor heat exchanger does not necessarily correspond to an increase in the amount of frost formation. 1st
As shown in the figure, when the compressor is started or when the outdoor blower is temporarily stopped for overload protection, the outdoor heat Since the exchanger temperature is below the predetermined temperature T 0 , the defrosting operation is started.
したがつて、このようなときはいくら除霜運転
を行なつても、暖房能力の向上ははかれず、また
逆に除霜運転中は、暖房運転が停止するため、室
温が低下し快適性が損なわれる。さらに、除霜運
転中は冷房運転となるため凝縮機、蒸発器が逆転
するため、運転効率が低下する欠点を有してい
た。 Therefore, no matter how much defrosting operation is performed in such a case, the heating capacity cannot be improved, and conversely, during defrosting operation, heating operation is stopped, so the room temperature decreases and comfort level decreases. is damaged. Furthermore, during the defrosting operation, the condenser and evaporator are reversed since the cooling operation is performed, resulting in a reduction in operating efficiency.
発明の目的
本発明は、上記従来の欠点を解消するもので、
正確に除霜運転の必要性を検出し、快適性および
運転効率の向上をはかることを目的の一つとする
ものである。OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks.
One of the purposes is to accurately detect the necessity of defrosting operation and improve comfort and operational efficiency.
発明の構成
この目的を達成するために本発明は、圧縮機、
四方弁、室内熱交換器、絞り装置、室外熱交換器
を環状に連結して、冷暖房運転可能な冷凍サイク
ルを構成し、この冷凍サイクルに室内送風機と室
外送風機を設け、暖房運転時圧縮機の吐出圧を検
知し、一定圧以上を検知すると室外送風機を停止
させ過負荷制御を行う圧力スイツチ、さらに暖房
運転時前記室外熱交換器に付着した霜を除去する
ために四方弁を切り換えて除霜する除霜手段と、
前記室外熱交換器の温度およびその付近の配管に
おける少なくとも一カ所の温度を検出するセンサ
を有し、前記センサが前記室外熱交換器の温度を
検出し、その温度が設定温度以下である場合は前
記除霜手段を作動させ、さらに前記圧縮機の起動
時から一定時間経過後までの間及び室外送風機が
一時的に停止した時点から運転を再開後の一定時
間経過までの間において前記センサの設定温度の
値を下げる制御装置を設けた構成としている。こ
の構成により、室外側熱交換器の除霜が正確に行
えるものである。Structure of the Invention To achieve this object, the present invention provides a compressor,
A four-way valve, an indoor heat exchanger, a throttling device, and an outdoor heat exchanger are connected in a ring to form a refrigeration cycle capable of heating and cooling operation.This refrigeration cycle is equipped with an indoor blower and an outdoor blower, and the compressor is turned on during heating operation. A pressure switch detects the discharge pressure, and when it detects a pressure above a certain level, stops the outdoor blower and performs overload control.Furthermore, a four-way valve is switched to defrost to remove frost that has adhered to the outdoor heat exchanger during heating operation. a defrosting means for
The sensor includes a sensor that detects the temperature of the outdoor heat exchanger and the temperature of at least one place in piping in the vicinity, and when the sensor detects the temperature of the outdoor heat exchanger and the temperature is below a set temperature, The defrosting means is activated, and the sensor is set during a period from when the compressor is started until a certain period of time has elapsed, and from when the outdoor blower is temporarily stopped until a certain period of time has elapsed after restarting operation. The configuration includes a control device that lowers the temperature value. With this configuration, the outdoor heat exchanger can be defrosted accurately.
実施例の説明
以下、本発明の一実施例を添付図面の第３図〜
第８図を参考に説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
This will be explained with reference to FIG.
第３図において、１は圧縮機、２は四方弁、３
は室内熱交換器、５はキヤピラリーチユーブ、６
は室外熱交換器で、これらを順次連結することに
より周知の冷凍サイクルを構成している。冷媒は
暖房時実線の如く流れ、また除霜運転時と冷房運
転時は破線の如く流れる。４は室内送風機、７は
室外送風機、８は室外熱交換器の温度センサ、９
は温度センサ８の信号を検知して除霜動作を行な
わせるためのマイクロコンピユータを使用した電
子制御装置である。 In Fig. 3, 1 is a compressor, 2 is a four-way valve, and 3
is an indoor heat exchanger, 5 is a capillary reach tube, and 6 is an indoor heat exchanger.
is an outdoor heat exchanger, and by connecting these in sequence, a well-known refrigeration cycle is constructed. The refrigerant flows as shown by the solid line during heating, and flows as shown by the broken line during defrosting and cooling operations. 4 is an indoor blower, 7 is an outdoor blower, 8 is an outdoor heat exchanger temperature sensor, 9
is an electronic control device that uses a microcomputer to detect the signal from the temperature sensor 8 and perform a defrosting operation.
次に上記電子制御装置の動作について第４図〜
第６図のタイミングチヤートを用いて説明する。 Next, the operation of the above electronic control device is shown in Fig. 4~
This will be explained using the timing chart shown in FIG.
第４図、第５図、第６図は、各状況による室外
熱交換器６温度、着霜量、圧縮機１、室外送風機
７の運転停止、着霜検知設定温度を示したもので
あり、T0は、通常運転時の着霜検知設定温度、
T1は圧縮機起動時、圧縮機運転中で室外送風機
停止時の着霜検知設定温度である。 Figures 4, 5, and 6 show the temperature of the outdoor heat exchanger 6, the amount of frost formation, the operation stoppage of the compressor 1 and the outdoor blower 7, and the frost detection setting temperature in each situation. T 0 is the frost detection setting temperature during normal operation,
T 1 is the frost formation detection setting temperature when the compressor is started, and when the outdoor blower is stopped while the compressor is running.
まず、第４図において、ａ点で圧縮機１、室外
送風機７が起動し、暖房運転を始める。この際、
圧縮機１の起動と同時に着霜検知設定温度をT0
からT1へ下げ、誤検知を防ぐ。そしてある一定
時間（ａ〜ｂ間）T1を続けた後、T0へ復帰させ
る。それから後は、通常の連続運転を続け、着霜
が進み限界を越えると（ｃ点）室外熱交換器６温
度がT0を下回り、除霜制御にはいる。 First, in FIG. 4, the compressor 1 and the outdoor blower 7 are started at point a, and heating operation begins. On this occasion,
At the same time as compressor 1 is started, the frost detection setting temperature is set to T 0.
to T 1 to prevent false positives. After continuing T1 for a certain period of time (between a and b), the process returns to T0 . After that, normal continuous operation is continued, and when frosting progresses and exceeds the limit (point c), the temperature of the outdoor heat exchanger 6 falls below T0 , and defrosting control is entered.
次に、第５図において、ｄ〜ｅ間は、ａ〜ｂ間
と同様にｆ点で室外送風機７が停止した際、同時
に着霜検知設定温度をT0からT1へ下げ、誤検知
を防ぐ。そしてｇ点で室外送風機７は運転を再開
するが、着霜検知設定温度はある一定時間（ｇ−
ｈ間）T1を維持し、ｈ点においてT1からT0へ戻
り、誤検知を防ぐ。 Next, in FIG. 5, between d and e, when the outdoor fan 7 stops at point f, similarly to between a and b, the frost detection setting temperature is simultaneously lowered from T 0 to T 1 to prevent false detection. prevent. Then, at point g, the outdoor fan 7 resumes operation, but the frost detection setting temperature remains unchanged for a certain period of time (g-
h) Maintain T 1 and return from T 1 to T 0 at point h to prevent false detection.
第６図において、ｉ〜ｊ間は第３図ａ〜ｂ間と
同様圧縮機１の起動時の誤検知を防ぎ、Ｋ点にお
いて室外送風機７が停止し、着霜検定設定温度も
T0からT1へ下がるが、それ以降、室外送風機７
が復帰せず停止したままである場合は、室外熱交
換器６の温度が着霜の増加とともに下がりT1ま
で下がると（ｌ点）従来通りの除霜運転にはい
る。 In Fig. 6, between i and j, similar to the period between a and b in Fig. 3, erroneous detection at the time of starting the compressor 1 is prevented, and at point K, the outdoor fan 7 is stopped, and the frosting test set temperature is also changed.
It decreases from T 0 to T 1 , but after that, outdoor blower 7
If the temperature of the outdoor heat exchanger 6 does not recover and remains stopped, the temperature of the outdoor heat exchanger 6 decreases as frost builds up, and when it drops to T1 (point l), the defrosting operation resumes as usual.
以上の制御内容は第７図ａ，ｂ，ｃ，ｄに示す
フローチヤートで表わされており、本実施例で
は、過負荷時に室外送風機７が停止するようにな
つている。 The above control contents are shown in the flowcharts shown in FIGS. 7a, b, c, and d, and in this embodiment, the outdoor blower 7 is stopped in the event of an overload.
第８図は本実施例における電子回路図であり第
３図で示したものについては説明を省く。 FIG. 8 is an electronic circuit diagram in this embodiment, and explanation of what is shown in FIG. 3 will be omitted.
同図において、１０は室内温度センサー、１１
は過負荷検知用圧力スイツチ、１２は室内温度設
定用可変抵抗器、１３，１４，１５はリレー駆動
用インバータ、１６，１７，１８はそれぞれ圧縮
機１、四方弁２、室外送風機７を駆動するリレ
ー、１９はマイクロコンピユータである。 In the figure, 10 is an indoor temperature sensor, 11
is a pressure switch for overload detection, 12 is a variable resistor for indoor temperature setting, 13, 14, and 15 are inverters for driving relays, and 16, 17, and 18 drive compressor 1, four-way valve 2, and outdoor blower 7, respectively. Relay 19 is a microcomputer.
上記マイクロコンピユータのout1、out2、out3
ポートよりそれぞれ着霜検知信号T0，T1、除霜
終了信号を設定している。またIN1ポートは、室
外熱交換器の温度センサ８より、着霜検知信号、
あるいは除霜終了信号がONしたかどうかを取り
込む入力ポート、IN2、IN3ポートはそれぞれ室
内温度検知、過負荷検知用の入力ポートである。
また、out4、out5、out6ポートはそれぞれ圧縮機
１、四方弁２、室外送風機７を駆動させる出力ポ
ートである。 out1, out2, out3 of the above microcomputer
The frost detection signals T 0 and T 1 and the defrost end signal are set respectively from the ports. In addition, the IN 1 port receives a frost detection signal from the temperature sensor 8 of the outdoor heat exchanger.
Alternatively, the input port that takes in whether the defrost end signal is turned on, IN 2 and IN 3 ports are input ports for indoor temperature detection and overload detection, respectively.
Further, the out4, out5, and out6 ports are output ports for driving the compressor 1, the four-way valve 2, and the outdoor blower 7, respectively.
発明の効果
上記実施例より明らかなように本発明は、室外
熱交換器の温度を測定する温度センサ及び、それ
によつて検出された温度により除霜運転をするか
否かを判定する制御装置の着霜検知設定温度を、
圧縮機起動時および室外送風機停止時とその後一
定時間、通常の温度よりも下げる制御を行なう制
御装置を設けることより、従来の着霜検知制御よ
りも一層正確に着霜量が把握でき、不必要な除霜
運転が排除でき、暖房効果を低下させることな
く、四方弁切換時の不快な冷媒音も軽減される等
の効果を奏する。Effects of the Invention As is clear from the above embodiments, the present invention provides a temperature sensor that measures the temperature of an outdoor heat exchanger, and a control device that determines whether to perform defrosting operation based on the temperature detected by the sensor. Set frost detection temperature,
By installing a control device that lowers the temperature below the normal temperature when the compressor starts, when the outdoor blower stops, and for a certain period of time thereafter, the amount of frost formation can be determined more accurately than conventional frost detection control, eliminating unnecessary This eliminates the need for defrosting operations, reduces unpleasant refrigerant noise when switching the four-way valve, and reduces the heating effect without reducing the heating effect.
第１図は従来の除霜検知モードのタイミングチ
ヤート、第２図は本発明の一実施例における除霜
運転制御装置を機能実現手段で表わしたブロツク
図、第３図は本発明の一実施例における空気調和
機の冷凍サイクル図、第４図から第６図はそれぞ
れ同空気調和機における異なる条件時の除霜検知
モードのタイミングチヤート、第７図ａ，ｂ，
ｃ，ｄは同除霜運転制御装置の着霜検知時のフロ
ーチヤート、第８図は同空気調和機における除霜
運転制御装置の電子回路図である。
１……圧縮機、２……四方弁、３……室内熱交
換器、４……室内送風機、５……キヤピラリチユ
ーブ、６……室外熱交換器、７……室外送風機、
８……温度センサ、９……電子制御装置、１０…
…室内温度センサ、１１……過負荷検知用圧力ス
イツチ、１９……マイクロコンピユータ。
Fig. 1 is a timing chart of a conventional defrost detection mode, Fig. 2 is a block diagram showing a defrosting operation control device according to an embodiment of the present invention as a function realizing means, and Fig. 3 is an embodiment of the present invention. Figures 4 to 6 are timing charts of the defrost detection mode under different conditions in the same air conditioner, and Figures 7a, b,
c and d are flowcharts when the defrosting operation control device detects frost formation, and FIG. 8 is an electronic circuit diagram of the defrosting operation control device in the air conditioner. 1... Compressor, 2... Four-way valve, 3... Indoor heat exchanger, 4... Indoor blower, 5... Capillary tube, 6... Outdoor heat exchanger, 7... Outdoor blower,
8...Temperature sensor, 9...Electronic control device, 10...
...Indoor temperature sensor, 11...Pressure switch for overload detection, 19...Microcomputer.
Claims (1)
室外熱交換器を環状に連結して、冷暖房運転可能
な冷凍サイクルを構成し、この冷凍サイクルに室
内送風機と室外送風機を設け、暖房運転時圧縮機
の吐出圧を検知し、一定圧以上を検知すると室外
送風機を停止させ過負荷制御を行う圧力スイツ
チ、さらに暖房運転時前記室外熱交換器に付着し
た霜を除去するために四方弁を切り換えて除霜す
る除霜手段と、前記室外熱交換器の温度およびそ
の付近の配管における少なくとも一カ所の温度を
検出するセンサを有し、前記センサが前記室外熱
交換器の温度を検出し、その温度が設定温度以下
である場合は前記除霜手段を作動させ、さらに前
記圧縮機の起動時から一定時間経過後までの間及
び室外送風機が一時的に停止した時点から運転を
再開後の一定時間経過までの間において前記セン
サの設定温度の値を下げる制御装置を設けた空気
調和機の除霜運転制御装置。1 Compressor, four-way valve, indoor heat exchanger, throttling device,
Outdoor heat exchangers are connected in a ring to form a refrigeration cycle capable of heating and cooling operation, and this refrigeration cycle is equipped with an indoor blower and an outdoor blower to detect the discharge pressure of the compressor during heating operation, and detect pressure above a certain level. Then, a pressure switch that stops the outdoor blower and performs overload control, a defrosting means that defrosts the outdoor heat exchanger by switching a four-way valve to remove frost that has adhered to the outdoor heat exchanger during heating operation, and and a sensor for detecting the temperature of at least one place in the piping in the vicinity thereof, and when the sensor detects the temperature of the outdoor heat exchanger and the temperature is below a set temperature, the defrosting means is activated. Activate the compressor, and further lower the set temperature of the sensor during a period from when the compressor is started until a certain period of time has elapsed, and from the time when the outdoor blower is temporarily stopped until a certain period of time has elapsed after restarting operation. Defrosting operation control device for air conditioners equipped with a control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59036666A JPS60181557A (en) | 1984-02-28 | 1984-02-28 | Air conditioner defrosting operation control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59036666A JPS60181557A (en) | 1984-02-28 | 1984-02-28 | Air conditioner defrosting operation control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60181557A JPS60181557A (en) | 1985-09-17 |
| JPH0343551B2 true JPH0343551B2 (en) | 1991-07-02 |
Family
ID=12476180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59036666A Granted JPS60181557A (en) | 1984-02-28 | 1984-02-28 | Air conditioner defrosting operation control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60181557A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2011909A1 (en) | 2007-07-05 | 2009-01-07 | SA Schappe | Hybrid yarn designed for reinforcing plaques |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09178328A (en) * | 1995-12-28 | 1997-07-11 | Ishizuka Denshi Kk | Frosting detecting device |
| KR100525420B1 (en) * | 2003-07-07 | 2005-11-02 | 엘지전자 주식회사 | method for controlling defrosting in heat pump |
-
1984
- 1984-02-28 JP JP59036666A patent/JPS60181557A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2011909A1 (en) | 2007-07-05 | 2009-01-07 | SA Schappe | Hybrid yarn designed for reinforcing plaques |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60181557A (en) | 1985-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0529830B2 (en) | ||
| US4869074A (en) | Regenerative refrigeration cycle apparatus and control method therefor | |
| JP3418287B2 (en) | Oil recovery control device for multi-type air conditioner | |
| JPH0343551B2 (en) | ||
| JPH0528439Y2 (en) | ||
| KR920001142A (en) | Compressor control method of air conditioner | |
| JPS63213765A (en) | Refrigeration equipment | |
| JPS61153332A (en) | heat pump air conditioner | |
| JPS62186157A (en) | Defrosting control unit of air conditioner | |
| JP3337264B2 (en) | Air conditioner defroster | |
| JPH0319457B2 (en) | ||
| JPH1194406A (en) | Air conditioner | |
| JPH063313B2 (en) | Heat pump type air conditioner | |
| JPH0217370A (en) | Air conditioner operation control device | |
| JPH0120604Y2 (en) | ||
| JPS60133249A (en) | Defrosting-controlling method for air conditioner | |
| JPS6221889Y2 (en) | ||
| JP2557423B2 (en) | Air conditioner | |
| JP2503783B2 (en) | Operation control device for air conditioner | |
| JPS60259851A (en) | Air conditioner | |
| JPH0395338A (en) | Device for controlling defrosting in air conditioner | |
| KR20000055144A (en) | Method for preventing freezing of the heat exchanger in the air conditioner | |
| JPH01306786A (en) | Control of defrosting in heat pump type air-conditioner | |
| JPS6144103Y2 (en) | ||
| JPS60169038A (en) | Device to control defrosting in air conditioner of heat pump type |