JPH06331202A - Heat pump type air conditioner - Google Patents
Heat pump type air conditionerInfo
- Publication number
- JPH06331202A JPH06331202A JP5119781A JP11978193A JPH06331202A JP H06331202 A JPH06331202 A JP H06331202A JP 5119781 A JP5119781 A JP 5119781A JP 11978193 A JP11978193 A JP 11978193A JP H06331202 A JPH06331202 A JP H06331202A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- outdoor heat
- heat pump
- type air
- exchanger
- 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.)
- Withdrawn
Links
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、除霜運転から暖房運転
に切換わる際の暖房能力を向上させるようにしたヒート
ポンプ式空気調和機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type air conditioner for improving heating capacity when switching from defrosting operation to heating operation.
【０００２】[0002]
【従来の技術】図４は、従来のヒートポンプ式空気調和
機の暖房運転時のフローチャートであって、ヒートポン
プ式空気調和機では、同図に示すように、流れの開始
（スタート）（１）、暖房運転（２）、除霜運転の必要
の判断（３）、除霜運転（４）及び除霜運転の終了の判
断（５）のステップが行われる。暖房運転時で外気温度
が低い場合には前記（１）〜（５）のステップが繰り返
えされる。2. Description of the Related Art FIG. 4 is a flowchart of heating operation of a conventional heat pump type air conditioner. In the heat pump type air conditioner, as shown in FIG. Steps of heating operation (2), determination of necessity of defrosting operation (3), defrosting operation (4), and determination of end of defrosting operation (5) are performed. When the outside air temperature is low during the heating operation, the steps (1) to (5) are repeated.
【０００３】図１は本発明の一実施例の系統図あるが、
冷凍サイクルそのものは従来と同様であるので、図１に
より従来のヒートポンプ式空気調和機の冷凍サイクルを
説明する。FIG. 1 is a system diagram of an embodiment of the present invention.
Since the refrigeration cycle itself is the same as the conventional one, the conventional refrigeration cycle of the heat pump type air conditioner will be described with reference to FIG.
【０００４】圧縮機２１、四方弁２２、室外熱交換器２
３、絞り２４及び室内熱交換器２５は、図示のようにこ
の順に接続されている。また、圧縮機２１の出口側の四
方弁２２の上流側から開閉弁２６をもつバイパス回路４
０が分岐し、同バイパス回路４０は絞り２４と室外熱交
換器２３の間で冷媒のラインに合流している。Compressor 21, four-way valve 22, outdoor heat exchanger 2
3, the throttle 24 and the indoor heat exchanger 25 are connected in this order as shown. Further, the bypass circuit 4 having an opening / closing valve 26 from the upstream side of the four-way valve 22 on the outlet side of the compressor 21.
0 branches, and the bypass circuit 40 joins the refrigerant line between the throttle 24 and the outdoor heat exchanger 23.
【０００５】暖房運転時、圧縮機２１で圧縮された高
温、高圧のガスは四方弁２２を介して室内側熱交換器２
５で凝縮液化し、絞り２４で絞り膨張し、室外側熱交換
器２３で蒸発、ガス化し、四方弁２２を介して圧縮機２
１に吸い込まれ、これを繰り返えす。除霜（デフロス
ト）運転時は、開閉弁２６が開となり圧縮機２１から吐
出された高温、高圧のガスはほとんどが開閉弁２６を通
り室外熱交換器２３で液化し、四方弁２２を介して圧縮
機２１の発熱分で蒸発して圧縮され、これを繰り返え
す。During the heating operation, the high-temperature, high-pressure gas compressed by the compressor 21 is passed through the four-way valve 22 to the indoor heat exchanger 2
5, condensed and liquefied, expanded and expanded by the throttle 24, evaporated and gasified by the outdoor heat exchanger 23, and compressed by the compressor 2 through the four-way valve 22.
It is sucked into 1, and this is repeated. During defrosting operation, the open / close valve 26 is opened, and most of the high-temperature, high-pressure gas discharged from the compressor 21 passes through the open / close valve 26 and is liquefied in the outdoor heat exchanger 23, and then the four-way valve 22 is used. The heat generated by the compressor 21 is evaporated to be compressed, and this is repeated.
【０００６】[0006]
【発明が解決しようとする課題】前記の従来のヒートポ
ンプ式空気調和機においては、除霜運転が終了し暖房運
転に切り換った時に、室外熱交換器２３、圧縮機２１等
に滞留する液冷媒等の影響により室内熱交換器２５に必
要な量の冷媒が供給されず、室内熱交換器２５の出口で
フラッシュガスが発生し、正常な冷凍サイクルが形成さ
れなかった。また、この状態が暖房運転時間の半分程度
となることがあった。In the above conventional heat pump type air conditioner, when the defrosting operation is completed and the operation mode is switched to the heating operation, the liquid retained in the outdoor heat exchanger 23, the compressor 21, etc. Due to the influence of the refrigerant and the like, the required amount of refrigerant was not supplied to the indoor heat exchanger 25, flash gas was generated at the outlet of the indoor heat exchanger 25, and a normal refrigeration cycle was not formed. Moreover, this state may be about half of the heating operation time.
【０００７】本発明は、以上の問題点を解決することが
できるヒートポンプ式空気調和機を提供しようとするも
のである。The present invention is intended to provide a heat pump type air conditioner capable of solving the above problems.
【０００８】[0008]
【課題を解決するための手段】本発明は、圧縮機、四方
弁、室外熱交換器、絞り及び室内熱交換器をこの順に接
続してヒートポンプサイクルを構成すると共に、圧縮機
からの吐出ガスを前記室外熱交換器にバイパスさせて室
外熱交換器の除霜を行うバイパス回路を備えてなるヒー
トポンプ式空気調和機において、除霜運転が終了し暖房
運転に復帰した時、一定時間室外熱交換器用ファンを増
速回転させる除霜制御手段を具備してなることを特徴と
する。According to the present invention, a compressor, a four-way valve, an outdoor heat exchanger, a throttle, and an indoor heat exchanger are connected in this order to form a heat pump cycle, and discharge gas from the compressor is discharged. In a heat pump type air conditioner comprising a bypass circuit for defrosting the outdoor heat exchanger by bypassing the outdoor heat exchanger, when the defrosting operation is completed and the heating operation is resumed, the outdoor heat exchanger is used for a certain period of time. It is characterized by comprising defrosting control means for rotating the fan at an increased speed.
【０００９】[0009]
【作用】本発明では、除霜運転が終了し暖房運転に復帰
した時、一定時間室外熱交換器用ファンが増速回転によ
って、空気は通常使用の風速より高い風速で室外交換器
へ送られ、内部の冷媒の蒸発が活溌になる。これによっ
て、室内熱交換器内へ送られる冷媒の量が増加し、室内
熱交換器出口のフラッシュガス発生の時間が短縮され、
正常な冷凍サイクルが形成されて暖房能力が向上する。
また、室外熱交換器用ファンの前記増速回転によって、
暖房運転開始時の室外熱交換器の表面温度が上昇し着霜
を遅らせることができる。In the present invention, when the defrosting operation is finished and the heating operation is resumed, the fan for the outdoor heat exchanger is acceleratingly rotated for a certain period of time, so that the air is sent to the outdoor exchanger at a higher wind speed than the normal use wind speed. The evaporation of the internal refrigerant becomes active. This increases the amount of refrigerant sent into the indoor heat exchanger, shortens the time for flash gas generation at the indoor heat exchanger outlet,
A normal refrigeration cycle is formed and heating capacity is improved.
Also, by the accelerated rotation of the fan for the outdoor heat exchanger,
The surface temperature of the outdoor heat exchanger at the start of the heating operation rises, and frost formation can be delayed.
【００１０】[0010]
【実施例】本発明の一実施例を、図１ないし図３によっ
て説明する。本実施例は、「従来の技術」欄で説明した
冷凍サイクルをもつヒートポンプ式空気調和機において
以下説明するような構成を付加している。即ち、図１に
示すように、バイパス回路４０の合流点と室外熱交換器
２３との間の冷媒ラインに温度センサ３０を、また、室
外熱交換器２３と四方弁２２との間の冷媒ラインに温度
センサ３１を設けている。温度センサ３０の信号３３及
び温度センサの信号３４は、制御装置２９へ入力される
ようになっており、同制御装置２９は、室外熱交換２３
へ風を送る室外ファン２７と開閉弁２６にそれぞれ制御
用の信号３２，３５を出力するようになっている。なお
図１において、２８は室内熱交換器２５へ風を送る室内
ファンである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In this embodiment, a heat pump type air conditioner having a refrigerating cycle described in the “Prior Art” section is added with a configuration described below. That is, as shown in FIG. 1, the temperature sensor 30 is provided in the refrigerant line between the confluence of the bypass circuit 40 and the outdoor heat exchanger 23, and the refrigerant line between the outdoor heat exchanger 23 and the four-way valve 22. Is equipped with a temperature sensor 31. The signal 33 of the temperature sensor 30 and the signal 34 of the temperature sensor are input to the control device 29, which controls the outdoor heat exchange 23.
Signals 32 and 35 for control are output to the outdoor fan 27 and the on-off valve 26, respectively, which blow the air. In FIG. 1, 28 is an indoor fan that sends air to the indoor heat exchanger 25.
【００１１】図２に、本実施例の暖房運転におけるフロ
ーチャートを示し、次のステップからなる。流れの開始
（スタート）（１）、暖房運転（２）、除霜運転が必要
かの判断（３）、除霜運転（４）、除霜運転終了の判断
（５）、室外ファンの回転数制御（６）、一定時間すぎ
たかどうかの判断（７）、及び室外ファン回転数制御解
除（８）である。FIG. 2 shows a flowchart of the heating operation of this embodiment, which comprises the following steps. Flow start (start) (1), heating operation (2), judgment whether defrosting operation is necessary (3), defrosting operation (4), judgment of defrosting operation end (5), rotation speed of outdoor fan The control (6), the judgment (7) as to whether or not a predetermined time has passed, and the outdoor fan speed control release (8).
【００１２】流れの開始（１）のステップでフローを開
始し暖房運転（２）のステップに入る。暖房運転時にお
いては、室外熱交換器２３の冷媒の温度が温度センサ３
０により検出されて除霜運転が必要かの判断（３）のス
テップが行われる。The flow starts at the step (1) of starting the flow and enters the step of heating operation (2). During the heating operation, the temperature of the refrigerant in the outdoor heat exchanger 23 is the temperature sensor 3
The step of determining (3) whether the defrosting operation is necessary as detected by 0 is performed.
【００１３】室外熱交換器２３に着霜が発生すると、温
度センサ３０の信号３３が制御装置２９へ入力され除霜
運転（４）のステップに入る。この時、制御装置２９の
信号３５によって開閉弁２６が開かれて圧縮機２１から
吐出された高温、高圧のガスのほとんどは開閉弁２６を
通り室外熱交換器２３で液化して除霜を行った上四方弁
２２を介して圧縮機２１の発熱分で蒸発して圧縮され、
これを繰り返す。この間、センサ３１によって室外熱交
換器２３を出る冷媒の温度が検出され除霜運転終了の判
断（５）のステップが行われる。When frost forms on the outdoor heat exchanger 23, the signal 33 from the temperature sensor 30 is input to the control device 29 and the defrosting operation (4) starts. At this time, the open / close valve 26 is opened by the signal 35 of the control device 29, and most of the high temperature and high pressure gas discharged from the compressor 21 passes through the open / close valve 26 and is liquefied in the outdoor heat exchanger 23 to perform defrosting. Also, the heat generated by the compressor 21 is evaporated and compressed through the upper four-way valve 22,
Repeat this. During this time, the temperature of the refrigerant leaving the outdoor heat exchanger 23 is detected by the sensor 31, and the step of determination (5) of ending the defrosting operation is performed.
【００１４】室外熱交換器２３の除霜が終了すると、温
度センサ３１の信号３４が制御装置２９へ入力され室外
ファンの回転数制御（６）のステップに入る。このステ
ップでは、従来の暖房運転を行うと共に、室外ファン２
７の回転数制御が行われる。具体的には、制御装置２９
の信号３５によって室外ファン２７の回転数を一時的に
上昇させ、その間一定時間すぎたかどうかの判断（７）
のステップが行われる。室外ファン２７の回転数の上昇
が一定時間継続すると図示しないタイマによって時間の
経過が検出されて室外ファン回転数制御解除（８）のス
テップに入り、室外ファン２７は通常の回転数に戻さ
れ、通常の暖房運転が行われる。When the defrosting of the outdoor heat exchanger 23 is completed, the signal 34 of the temperature sensor 31 is input to the control device 29 and the step of controlling the rotation speed (6) of the outdoor fan is started. In this step, the conventional heating operation is performed and the outdoor fan 2
The rotation speed control of 7 is performed. Specifically, the control device 29
The signal 35 indicates that the rotation speed of the outdoor fan 27 is temporarily increased, and it is determined whether or not a predetermined time has passed during that time (7).
The steps are performed. When the increase in the rotation speed of the outdoor fan 27 continues for a certain period of time, the timer (not shown) detects the passage of time and enters the step of releasing the outdoor fan rotation speed control (8) to return the outdoor fan 27 to the normal rotation speed. Normal heating operation is performed.
【００１５】以上のように、本実施例では、除霜運転が
終了し暖房運転に復帰した時、一定時間室外ファン２７
が増速されて回転数が上昇する。このために、室外熱交
換器２３へ送られる空気の風速が高くなって室外熱交換
器２３内での冷媒の蒸発が活溌となり、室内側熱交換器
２５へ供給される冷媒の量を増加することができ、室内
熱交換器２５出口の冷媒のフラッシュガス発生の時間を
短縮して暖房能力を向上させることができる。As described above, in this embodiment, when the defrosting operation is completed and the heating operation is resumed, the outdoor fan 27 is operated for a certain period of time.
Is increased and the rotation speed is increased. For this reason, the wind speed of the air sent to the outdoor heat exchanger 23 becomes high, the evaporation of the refrigerant in the outdoor heat exchanger 23 becomes active, and the amount of the refrigerant supplied to the indoor heat exchanger 25 increases. Therefore, it is possible to shorten the time for generating the flash gas of the refrigerant at the outlet of the indoor heat exchanger 25 and improve the heating capacity.
【００１６】また、前記室外ファン２７の増速回転によ
って、室外熱交換器２３の表面温度が上昇し、暖房運転
時の室外熱交換器２３への着霜を遅らせることができ
る。Further, the surface speed of the outdoor heat exchanger 23 rises due to the accelerated rotation of the outdoor fan 27, so that the frost formation on the outdoor heat exchanger 23 during the heating operation can be delayed.
【００１７】図３に、本実施例と従来のヒートポンプ式
空気調和機暖房運転時の室内熱交換器２５内の冷媒流量
の１例を示す。図中本実施例の場合は実線４１で、従来
の場合は点線４２でそれぞれ冷媒流量が示されている。
図３によれば、本実施例の方が除霜運転から暖房運転に
復帰した場合の流量が安定し、しかも多くなっているこ
とが示されている。FIG. 3 shows an example of the flow rate of the refrigerant in the indoor heat exchanger 25 during the heating operation of this embodiment and the conventional heat pump type air conditioner. In the drawing, the solid line 41 indicates the refrigerant flow rate, and the conventional case indicates the refrigerant flow rate on the dotted line 42.
According to FIG. 3, it is shown that the flow rate in the case of returning from the defrosting operation to the heating operation is stable and increases in the present embodiment.
【００１８】なお、前記実施例では室外ファン２７をタ
イマにより一定時間増速したが、温度センサ３１又は３
０の信号３３又は３４によって室外熱交換器２３の温度
の上昇を検出して制御装置２９を介して室外ファン２７
を制御するようにしてもよい。In the above embodiment, the outdoor fan 27 is accelerated by the timer for a certain period of time, but the temperature sensor 31 or 3 is used.
An increase in the temperature of the outdoor heat exchanger 23 is detected by the signal 33 or 34 of 0, and the outdoor fan 27 is transmitted via the control device 29.
May be controlled.
【００１９】[0019]
【発明の効果】本発明では、除霜運転から暖房運転に復
帰した直後の一定時間室外熱交換器用ファンを増速回転
させることによって室外熱交換器内の冷媒の蒸発が活溌
化され、室内熱交換器へ供給される冷媒の量が増加して
暖房能力が増大すると共に、暖房運転開始時の室外熱交
換器の表面温度を上げて表面への着霜を遅らせることが
できる。According to the present invention, the evaporation of the refrigerant in the outdoor heat exchanger is activated by accelerating the rotation of the outdoor heat exchanger fan for a certain period of time immediately after returning from the defrosting operation to the heating operation, thereby activating the indoor heat. The amount of refrigerant supplied to the exchanger increases and the heating capacity increases, and the surface temperature of the outdoor heat exchanger at the start of heating operation can be increased to delay frost formation on the surface.
【図１】本発明の一実施例の系統図である。FIG. 1 is a system diagram of an embodiment of the present invention.
【図２】同実施例の暖房運転時のフローチャートであ
る。FIG. 2 is a flowchart during heating operation of the same embodiment.
【図３】暖房運転時の室内熱交換器の冷媒流量を示すグ
ラフである。FIG. 3 is a graph showing a refrigerant flow rate of the indoor heat exchanger during heating operation.
【図４】従来のヒートポンプ式空気調和機の暖房運転時
のフローチャートである。FIG. 4 is a flowchart during heating operation of a conventional heat pump type air conditioner.
２１ 圧縮機 ２２ 四方弁 ２３ 室外熱交換器 ２４ 絞り ２５ 室内熱交換器 ２６ 開閉弁 ２７ 室外ファン ２９ 制御装置 ３０，３１ 温度センサ ３２，３３，３４，３５ 信号 ４０ バイパス回路 21 compressor 22 four-way valve 23 outdoor heat exchanger 24 throttle 25 indoor heat exchanger 26 open / close valve 27 outdoor fan 29 control device 30, 31 temperature sensor 32, 33, 34, 35 signal 40 bypass circuit
Claims (1)
び室内熱交換器をこの順に接続してヒートポンプサイク
ルを構成すると共に、圧縮機からの吐出ガスを前記室外
熱交換器にバイパスさせて室外熱交換器の除霜を行うバ
イパス回路を備えてなるヒートポンプ式空気調和機にお
いて、除霜運転が終了し暖房運転に復帰した時、一定時
間室外熱交換器用ファンを増速回転させる除霜制御手段
を具備してなることを特徴とするヒートポンプ式空気調
和機。1. A heat pump cycle is constructed by connecting a compressor, a four-way valve, an outdoor heat exchanger, a throttle, and an indoor heat exchanger in this order, and discharge gas from the compressor is bypassed to the outdoor heat exchanger. In a heat pump type air conditioner equipped with a bypass circuit for defrosting the outdoor heat exchanger, when the defrosting operation is completed and the heating operation is resumed, the outdoor heat exchanger fan is accelerated for a certain period of time. A heat pump type air conditioner comprising a control means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5119781A JPH06331202A (en) | 1993-05-21 | 1993-05-21 | Heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5119781A JPH06331202A (en) | 1993-05-21 | 1993-05-21 | Heat pump type air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06331202A true JPH06331202A (en) | 1994-11-29 |
Family
ID=14770069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5119781A Withdrawn JPH06331202A (en) | 1993-05-21 | 1993-05-21 | Heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06331202A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007051840A (en) * | 2005-08-19 | 2007-03-01 | Matsushita Electric Ind Co Ltd | Air conditioner |
| JP2009257614A (en) * | 2008-04-14 | 2009-11-05 | Hitachi Appliances Inc | Air conditioning system |
| WO2010104757A3 (en) * | 2009-03-10 | 2011-01-06 | Hallowell International, Llc | Defrost system and method for heat pumps |
| JP2011085320A (en) * | 2009-10-15 | 2011-04-28 | Mitsubishi Electric Corp | Heat pump device |
| JP2014040953A (en) * | 2012-08-22 | 2014-03-06 | Mitsubishi Electric Corp | Freezing air conditioner |
| WO2017002618A1 (en) * | 2015-07-01 | 2017-01-05 | 三菱重工業株式会社 | Air conditioning system, control method, and program |
| WO2018037465A1 (en) * | 2016-08-22 | 2018-03-01 | 三菱電機株式会社 | Heat pump apparatus, air conditioner, and water heater |
-
1993
- 1993-05-21 JP JP5119781A patent/JPH06331202A/en not_active Withdrawn
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007051840A (en) * | 2005-08-19 | 2007-03-01 | Matsushita Electric Ind Co Ltd | Air conditioner |
| JP2009257614A (en) * | 2008-04-14 | 2009-11-05 | Hitachi Appliances Inc | Air conditioning system |
| WO2010104757A3 (en) * | 2009-03-10 | 2011-01-06 | Hallowell International, Llc | Defrost system and method for heat pumps |
| JP2011085320A (en) * | 2009-10-15 | 2011-04-28 | Mitsubishi Electric Corp | Heat pump device |
| JP2014040953A (en) * | 2012-08-22 | 2014-03-06 | Mitsubishi Electric Corp | Freezing air conditioner |
| WO2017002618A1 (en) * | 2015-07-01 | 2017-01-05 | 三菱重工業株式会社 | Air conditioning system, control method, and program |
| JP2017015333A (en) * | 2015-07-01 | 2017-01-19 | 三菱重工業株式会社 | Air conditioning system, control method and program |
| WO2018037465A1 (en) * | 2016-08-22 | 2018-03-01 | 三菱電機株式会社 | Heat pump apparatus, air conditioner, and water heater |
| CN109564032A (en) * | 2016-08-22 | 2019-04-02 | 三菱电机株式会社 | Heat pump assembly, air conditioner and water heater |
| JPWO2018037465A1 (en) * | 2016-08-22 | 2019-06-20 | 三菱電機株式会社 | Heat pump device, air conditioner, and water heater |
| US10774837B2 (en) | 2016-08-22 | 2020-09-15 | Mitsubishi Electric Corporation | Heat pump apparatus, air conditioner, and water heater |
| CN109564032B (en) * | 2016-08-22 | 2020-11-27 | 三菱电机株式会社 | Heat pump device, air conditioner and water heater |
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Legal Events
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| A300 | Withdrawal of application because of no request for examination |
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