JPS6166037A - Defrosting control unit of air conditioner - Google Patents
Defrosting control unit of air conditionerInfo
- Publication number
- JPS6166037A JPS6166037A JP59188353A JP18835384A JPS6166037A JP S6166037 A JPS6166037 A JP S6166037A JP 59188353 A JP59188353 A JP 59188353A JP 18835384 A JP18835384 A JP 18835384A JP S6166037 A JPS6166037 A JP S6166037A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heat exchanger
- time
- defrosting
- defrosting operation
- 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
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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は空気熱源式ヒートポンプにて暖房運転を行なう
空気調和機に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air conditioner that performs heating operation using an air source heat pump.
従来例の構成とその問題点
従来この種の空気調和機は、第1図に示すように、圧縮
機1、四方切換弁2、室内側熱交換器3、減圧装置4、
室外熱交換器5とをそれぞれ連結し 。Configuration of conventional example and its problems Conventionally, this type of air conditioner has a compressor 1, a four-way switching valve 2, an indoor heat exchanger 3, a pressure reducing device 4,
and an outdoor heat exchanger 5 respectively.
て冷凍サイクルを形成し、冷房時は四方切換弁2を切換
えることにより圧縮機吐出回路a、を室外側熱交換器5
に、圧縮機吸入回路a2を室内側熱交換器3に接続し、
周知の吸熱作用で室内の冷房運転を行い、暖房時には、
冷房時の逆方向になるように四方切換弁2を切り換え、
周知の放熱作用にて暖房運転が行なえるようになってい
る。このような空気熱源式ヒートポンプでは、暖房運転
時に室外温度が低下すると室外側熱交換器5表面に霜が
成長して、暖房能力が低下するので、熱交換器温度検出
装置7を設け、熱交換器温度を検出し、また運転積算時
間などを利用して暖房運転中に一時冷房運転を行ない室
外熱交換器5の117をとかし、再び暖房運転を行なう
という除霜運転がなされて゛いる。例えば、一時間暖房
運転を行なったら(室温制御による圧縮器1の停止中も
暖房運転とする)室外熱交換器5の温度を検出し、設定
温度以下となっていたら除霜運転を行なう制御を用いて
いる。During cooling, the four-way switching valve 2 is switched to connect the compressor discharge circuit a to the outdoor heat exchanger 5.
, connect the compressor suction circuit a2 to the indoor heat exchanger 3,
It performs indoor cooling operation using the well-known endothermic action, and during heating,
Switch the four-way switching valve 2 so that it is in the opposite direction during cooling,
Heating operation can be performed using the well-known heat dissipation function. In such an air heat source type heat pump, when the outdoor temperature drops during heating operation, frost grows on the surface of the outdoor heat exchanger 5 and the heating capacity decreases. A defrosting operation is performed in which the temperature of the outdoor heat exchanger 5 is detected and the cumulative operating time is used to perform a temporary cooling operation during the heating operation to melt 117 of the outdoor heat exchanger 5, and then the heating operation is performed again. For example, after heating operation has been performed for one hour (heating operation is performed even when compressor 1 is stopped due to room temperature control), the temperature of outdoor heat exchanger 5 is detected, and if the temperature is below the set temperature, control is performed to perform defrosting operation. I am using it.
ここで、除霜運転の直前に暖房運転を停止し、再び暖房
運転を行なう(たとえば、就寝前に運転を停止し、翌朝
再び暖房運転を行なう)ような場合、外気温度が0°C
以下の時、前の運転による霜がそのまま熱交換器5に残
シ、次回運転時に能力が著しく低下し、十分な暖房運転
が行なえなかったシ、運転始動時に行なわれる除霜運転
時間が大巾に長くなるなどの欠点があった。Here, if you stop the heating operation immediately before the defrosting operation and start the heating operation again (for example, stop the operation before going to bed and start the heating operation again the next morning), if the outside temperature is 0°C.
In the following cases, the frost from the previous operation remains in the heat exchanger 5, the capacity decreases significantly during the next operation, and sufficient heating operation cannot be performed, or the defrosting operation time performed at the start of operation is too long. It had some drawbacks, such as being long.
発明の目的
本発明は上記問題点を解消するもので、いかなる場合で
も運転開始より十分な暖房運転が行なえることを目的と
するものである。OBJECTS OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to enable sufficient heating operation from the start of operation in any case.
発明の構成
この目的を達成するために本発明は、室外気温を検出す
る温度検出装置と熱交換器温度検出装置とを設け、空気
調和機の運転停止信号が入力された後外気温が設定温度
より低い場合に除霜運転を行ない、熱交換器の温度と設
定温度との比較により除霜運転を異ならせる除霜制御装
置によシ構成したものである。Structure of the Invention In order to achieve this object, the present invention provides a temperature detection device for detecting the outdoor temperature and a heat exchanger temperature detection device, so that after an air conditioner operation stop signal is input, the outdoor temperature is set to the set temperature. The defrosting control device performs defrosting operation when the temperature is lower than that of the heat exchanger, and changes the defrosting operation depending on the comparison between the temperature of the heat exchanger and the set temperature.
この構成により、暖房運転停止時の状況を判定して、運
転停止時に室外熱交換器に霜が残らないように除霜運転
を行なうことができる。With this configuration, it is possible to determine the situation when the heating operation is stopped and perform the defrosting operation so that no frost remains on the outdoor heat exchanger when the heating operation is stopped.
実施例の説明
以下本発明の一実施例を第2図〜第6図を参考に説明す
る。DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 to 6.
まず、第2図により空気調和機の構成について説明する
。尚、第1図と同一部分には同一番を付し、説明を省略
する。First, the configuration of the air conditioner will be explained with reference to FIG. It should be noted that the same parts as in FIG. 1 are given the same numbers and their explanations will be omitted.
同図において7は熱交換器温度検出装置、8は外気温度
検出装置をそれぞれ示している。また、第3図は第2図
の構成における制御のグロック図を示している。In the figure, 7 indicates a heat exchanger temperature detection device, and 8 indicates an outside air temperature detection device. Further, FIG. 3 shows a block diagram of control in the configuration of FIG. 2.
同制御ブロック図に示すように除霜制御装置は、室外熱
交換器温度検出装#7と外気温センサ8とから情報をう
けと9マイクロコンピユータが判断して、運転終了後除
霜の信号を出し、除霜制御回路にて必要な時間の除霜運
転を行なうものである。As shown in the same control block diagram, the defrosting control device receives information from the outdoor heat exchanger temperature detection device #7 and the outside temperature sensor 8, and the microcomputer 9 determines that the defrosting signal is sent after the operation ends. The defrost control circuit performs defrosting operation for the required time.
つまり、空気調和機の運転スイッチを切ると同時に熱交
換器温度検出装置7および外気温度検出装置8よシ熱交
換器温度T と外気温度T2を検出し、運転停止後の運
転終了除霜が必要かどうかを判定しさらに運転終了除霜
の運転時間を決め、除霜運転にはいる。ここで、室内お
よび室外の送風機6は停止し、四方切換弁2は冷房サイ
ク/し側へ切りかえ、圧縮機1は連続運転となる。前記
A転終了後除霜の運転時間が経過しだらすべての運転を
停止する。In other words, it is necessary to detect the heat exchanger temperature T and the outside air temperature T2 by the heat exchanger temperature detection device 7 and the outside air temperature detection device 8 at the same time as the operation switch of the air conditioner is turned off, and to defrost the operation after the operation is stopped. It is determined whether or not the operation is completed, and the operation time for defrosting is determined, and defrosting operation is started. At this point, the indoor and outdoor blowers 6 are stopped, the four-way switching valve 2 is switched to the cooling cycle/off side, and the compressor 1 is in continuous operation. After the defrosting operation time has elapsed after the completion of the A rotation, all operations are stopped.
次に第4図の制御フローチャートによシ具体的な運転制
御について説明する。Next, specific operation control will be explained with reference to the control flowchart shown in FIG.
まず、運転開始あるいは、除霜運転終了からの運転時間
を積算する。空気調和機の運転停止信号が入力されると
熱交換器温度T1および外気温度T2をそれぞれ検出す
る。ここではじめに外気温度T2を判定し、0°Cより
も高い設定温度Ta以上の外気温であればそのまま運転
を終了する。また、外気温度T2が0°C以下の場合は
室外熱交換器5に着霜しているので除霜運転が必要であ
ると判定する。ここで第5図に積算運転時間と着霜量の
関係を示す。すなわち、時間Oで運転開始あるいは除霜
運転終了とすると時間工、までは大巾な霜の成長はなく
除霜運転を必要としない。まだ、第6図に積算運転時間
と必要除霜運転時間tDの関係を示す。時間I、までは
除霜運転を必要とせず、■、をすぎてからは図に示すよ
うな除霜運転時間tDで除霜運転が必要である。First, the operating time from the start of operation or the end of defrosting operation is accumulated. When the air conditioner operation stop signal is input, the heat exchanger temperature T1 and the outside air temperature T2 are detected. First, the outside air temperature T2 is determined, and if the outside air temperature is equal to or higher than the set temperature Ta, which is higher than 0°C, the operation is immediately terminated. Moreover, when the outside air temperature T2 is 0° C. or lower, it is determined that the outdoor heat exchanger 5 is frosted and that a defrosting operation is necessary. Here, FIG. 5 shows the relationship between the cumulative operating time and the amount of frost formation. That is, if the operation is started or the defrosting operation is ended at time O, there is no significant frost growth until the time O, and no defrosting operation is required. Still, FIG. 6 shows the relationship between the cumulative operating time and the required defrosting operating time tD. Defrosting operation is not required until time I, and after time 1, defrosting operation is required at defrosting operation time tD as shown in the figure.
次に外気温度T2が0°C以上設定温度Ta以下の時に
は、熱交換器温度T1を判定し、熱交換器温度T1がO
′C以下の時に送風機6を清算運転時送風運転をする必
要はない。Next, when the outside air temperature T2 is greater than or equal to 0°C and less than or equal to the set temperature Ta, the heat exchanger temperature T1 is determined, and the heat exchanger temperature T1 is
When the temperature is below 'C, there is no need to operate the blower 6 during clearing operation.
しだがって、運転終了時は室外熱交換器5にいる
かな繍場合でも霜が残ることはなく、ゆえて、運転開始
に十分な暖房能力を得ることができる。Therefore, even if the outdoor heat exchanger 5 is closed at the end of operation, no frost remains, and therefore sufficient heating capacity can be obtained at the start of operation.
発明の効果
以上のように本発明は空気熱源式ヒートポンプにて暖房
運転する空気調和機の運転終了時に外気温と室外熱交換
器の温度とを設定温度と比較することにより除霜運転時
間を決定し、運転終了除霜運転を行なう空気調和機の除
霜制御であり、運転終了時の除霜を確実に行なえるので
次の運転開始時に十分な暖房能力を得ることができ、立
上り時間の短縮や良好な暖房フィーリングを得られる等
の暖房機としての性能を大巾に向上出来る。さらに必要
なときにのみ運転終了除霜をするため、無駄な電力消費
を防ぎ、また簡単な構成で実現できるものであるなど数
々の利点を有するものである。Effects of the Invention As described above, the present invention determines the defrosting operation time by comparing the outside air temperature and the temperature of the outdoor heat exchanger with the set temperature at the end of operation of an air conditioner that performs heating operation using an air heat pump. This is a defrosting control for air conditioners that performs end-of-operation defrosting operation, and since defrosting can be reliably performed at the end of operation, sufficient heating capacity can be obtained at the start of the next operation, reducing startup time. The performance of the heater can be greatly improved, such as by providing a good heating feeling. Furthermore, since the defrosting operation is performed only when necessary, wasteful power consumption is prevented, and it can be realized with a simple configuration, which has many advantages.
第1図は従来例を示す冷凍サイクル図、第2図は本発明
の一実施例を示す冷凍サイクル図、第3図は同制御ブロ
ック図、第4図は同制御流れ図、第5図は積算運転時間
と着霜量の関係を示す特性図、第6図は積算運転時間と
必要除霜運転時間との関係を示す特性図である。
1・・・・・・圧縮機、2・・・・・・四方切換弁、3
・・・・・室内熱交換器、4・・・・・・減圧装置、5
・・・・室外熱交換器、6・・・ 室外送風機、7 ・
・熱交換器温度検出装置、8・・ 外気温検出装置。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名第2
図
第3図
第4図Fig. 1 is a refrigeration cycle diagram showing a conventional example, Fig. 2 is a refrigeration cycle diagram showing an embodiment of the present invention, Fig. 3 is a control block diagram of the same, Fig. 4 is a control flow diagram of the same, and Fig. 5 is an integration diagram. FIG. 6 is a characteristic diagram showing the relationship between the operating time and the amount of frost formation, and FIG. 6 is a characteristic diagram showing the relationship between the cumulative operating time and the required defrosting operating time. 1... Compressor, 2... Four-way switching valve, 3
... Indoor heat exchanger, 4 ... Pressure reduction device, 5
... Outdoor heat exchanger, 6... Outdoor blower, 7 ・
- Heat exchanger temperature detection device, 8... Outside temperature detection device. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4
Claims (1)
らなる冷媒回路と、前記室外熱交換器の温度を検出する
熱交換器温度検出装置と、外気温を検出する外気温検出
装置と、前記室外熱交換器の除霜運転を制御する除霜制
御装置とを備え、前記除霜制御装置は前記熱交換器温度
検出装置及び外気温検出装置からの検出温度とあらかじ
め設定した設定温度とを比較し、空気調和機の運転停止
信号が入力された後、外気温が設定温度より低い場合に
除霜運転を行ない、前記熱交換器温度検出装置からの検
出温度と設定温度を比較して運転方法を異ならせる構成
とした空気調和機の除霜制御装置。A refrigerant circuit consisting of a compressor, a four-way switching valve, an outdoor heat exchanger, an indoor heat exchanger, etc., a heat exchanger temperature detection device that detects the temperature of the outdoor heat exchanger, and an outside temperature detection device that detects the outside temperature. and a defrost control device that controls defrosting operation of the outdoor heat exchanger, and the defrost control device controls the temperature detected by the heat exchanger temperature detection device and the outside temperature detection device and a preset temperature. After the air conditioner operation stop signal is input, a defrosting operation is performed when the outside temperature is lower than the set temperature, and the detected temperature from the heat exchanger temperature detection device is compared with the set temperature. A defrosting control device for an air conditioner configured to have different operating methods.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59188353A JPS6166037A (en) | 1984-09-07 | 1984-09-07 | Defrosting control unit of air conditioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59188353A JPS6166037A (en) | 1984-09-07 | 1984-09-07 | Defrosting control unit of air conditioner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6166037A true JPS6166037A (en) | 1986-04-04 |
Family
ID=16222140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59188353A Pending JPS6166037A (en) | 1984-09-07 | 1984-09-07 | Defrosting control unit of air conditioner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6166037A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0490836U (en) * | 1990-12-19 | 1992-08-07 | ||
JP2007255866A (en) * | 2006-03-27 | 2007-10-04 | Matsushita Electric Ind Co Ltd | Air conditioner |
JP2007278536A (en) * | 2006-04-03 | 2007-10-25 | Matsushita Electric Ind Co Ltd | Air conditioner |
CN112303815A (en) * | 2020-09-27 | 2021-02-02 | 青岛海尔空调电子有限公司 | Defrosting control method of air conditioner outdoor unit and air conditioner |
CN112537184A (en) * | 2020-12-25 | 2021-03-23 | 广东积微科技有限公司 | Control method suitable for defrosting and heating of air conditioner of motor home |
CN112944753A (en) * | 2019-12-11 | 2021-06-11 | 杭州三花研究院有限公司 | Control system and control method thereof |
-
1984
- 1984-09-07 JP JP59188353A patent/JPS6166037A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0490836U (en) * | 1990-12-19 | 1992-08-07 | ||
JP2007255866A (en) * | 2006-03-27 | 2007-10-04 | Matsushita Electric Ind Co Ltd | Air conditioner |
JP4605065B2 (en) * | 2006-03-27 | 2011-01-05 | パナソニック株式会社 | Air conditioner |
JP2007278536A (en) * | 2006-04-03 | 2007-10-25 | Matsushita Electric Ind Co Ltd | Air conditioner |
JP4622921B2 (en) * | 2006-04-03 | 2011-02-02 | パナソニック株式会社 | Air conditioner |
CN112944753A (en) * | 2019-12-11 | 2021-06-11 | 杭州三花研究院有限公司 | Control system and control method thereof |
CN112303815A (en) * | 2020-09-27 | 2021-02-02 | 青岛海尔空调电子有限公司 | Defrosting control method of air conditioner outdoor unit and air conditioner |
CN112537184A (en) * | 2020-12-25 | 2021-03-23 | 广东积微科技有限公司 | Control method suitable for defrosting and heating of air conditioner of motor home |
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