JPS63129257A - Heat pump type air conditioner - Google Patents
Heat pump type air conditionerInfo
- Publication number
- JPS63129257A JPS63129257A JP27465686A JP27465686A JPS63129257A JP S63129257 A JPS63129257 A JP S63129257A JP 27465686 A JP27465686 A JP 27465686A JP 27465686 A JP27465686 A JP 27465686A JP S63129257 A JPS63129257 A JP S63129257A
- Authority
- JP
- Japan
- Prior art keywords
- indoor
- compressor
- outdoor
- heat exchanger
- refrigerant
- 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.)
- Granted
Links
- 239000003507 refrigerant Substances 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 description 14
- 239000003921 oil Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は室内を冷暖房するヒートポンプ式空気調和機に
関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a heat pump type air conditioner that cools and heats a room.
（ロ）従来の技術
ヒートポンプ式空気調和機の運転を夜間などに長時間停
止すると、圧縮機内の潤滑油中に液冷媒が溶解して溜ま
り込む、所謂寝込み現象が生じて圧縮機の起動時にオイ
ルフォーミングが発生し、圧縮機内の潤滑油が冷媒と一
緒に吐出されて圧縮機が焼きついてしまうため、特公昭
５９−１６１９０号公報に、運転の停止中には圧縮機と
室内外熱交換器との間を遮断するようにした装置が提示
されている。(b) Conventional technology When the operation of a heat pump type air conditioner is stopped for a long time, such as at night, a so-called stagnation phenomenon occurs, in which liquid refrigerant dissolves in the lubricating oil inside the compressor and accumulates, causing oil leakage when the compressor starts up. Forming occurs and the lubricating oil inside the compressor is discharged together with the refrigerant, causing the compressor to burn out. A device has been proposed which is designed to block the gap between the two.
（ハ）発明が解決しようとする問題点
ヒートポンプ式空気調和機が運転を停止している時は室
内空気と室外空気の温度の低い方に冷媒が凝縮して溜才
り込むため、冷媒は圧縮機に寝込むほかに暖房停止時に
は室外ユニット内の熱交換器に、又、冷房停止時には、
室内ユニット内の熱交換器に寝込んでしまい、暖房運転
の開始時には室外熱交換器に寝込んだ液冷媒が圧縮機の
吸込側にあるアキュームレータへ、又、冷房運転の開始
時には室内熱交換器に寝込んだ液冷媒がアキュームレー
タへ流れ込んで液冷媒が圧縮機に吸い込まれてしまい、
液圧縮やオイルフォーミングが発生する問題点があった
。(c) Problems to be solved by the invention When a heat pump type air conditioner is not operating, the refrigerant condenses and stagnates in the lower temperature of indoor air and outdoor air, so the refrigerant is compressed. In addition to sleeping in the machine, when the heating is stopped, the heat exchanger in the outdoor unit, and when the cooling is stopped,
The liquid refrigerant gets stuck in the heat exchanger in the indoor unit, and when heating operation starts, the liquid refrigerant gets stuck in the outdoor heat exchanger and goes into the accumulator on the suction side of the compressor, and when cooling operation starts, it gets stuck in the indoor heat exchanger. The saliva refrigerant flows into the accumulator and the liquid refrigerant is sucked into the compressor.
There were problems with liquid compression and oil forming.
かかる問題点は室外ユニットと室内ユニットとを接続す
るユニット間配管が長いために冷媒チャージ量を多くし
た分離型空気調和機において顕著に発生し、特に圧縮機
の能力をインバータ装置（周波数変換装置）で上げて冷
媒循環量を増やすようにした空気調和機においてはより
一層顕著に発生していた。This problem occurs most notably in separate air conditioners that use a large amount of refrigerant charge due to the long inter-unit piping connecting the outdoor unit and indoor unit. This problem was even more noticeable in air conditioners that increased the amount of refrigerant circulated.
本発明は運転の停止中に冷媒が熱交換器に溜まり込む寝
込み現象に対処するようにしたヒートポンプ式空気調和
機を提供するものである。The present invention provides a heat pump type air conditioner that is adapted to deal with the stagnation phenomenon in which refrigerant accumulates in a heat exchanger during shutdown.
（二〉問題点を解決するための手段
本発明は、四方切換弁の切換えにより冷房サイクルと暖
房サイクルとを形成するヒートポンプ式空気調和機に、
冷房及び／又は暖房の運転開始時に室内温度と室外温度
とを比較して圧縮機の起動から所定時間だけ四方切換弁
を逆サイクルに切換える制御装置を設けるようにしたも
のである。(2) Means for Solving the Problems The present invention provides a heat pump air conditioner that forms a cooling cycle and a heating cycle by switching a four-way switching valve.
A control device is provided which compares the indoor temperature and outdoor temperature at the start of cooling and/or heating operation and switches the four-way switching valve to the reverse cycle for a predetermined period of time from the start of the compressor.
（ホ）作用
暖房運転開始時に室内外の温度を比較して室外温度が低
い場合には圧縮機の起動から所定時間（１分間）だけ四
方切換弁を逆サイクル（冷房サイクル）に切換えること
により、暖房運転の停止中に室外熱交換器に寝込んだ液
冷媒を追い出して室内熱交換器へ溜め込む。そして、１
分経過後、四方切換弁を暖房サイクルに切換えることに
より室内熱交換器に溜まり込んだ液冷媒が室外熱交換器
で蒸発し、圧縮機にはガス冷媒が吸い込まれる。(E) Operation When the indoor and outdoor temperatures are compared at the start of heating operation, if the outdoor temperature is low, the four-way selector valve is switched to the reverse cycle (cooling cycle) for a predetermined period of time (1 minute) from the start of the compressor. Liquid refrigerant that has settled in the outdoor heat exchanger while heating operation is stopped is expelled and stored in the indoor heat exchanger. And 1
After a minute has passed, the four-way switching valve is switched to the heating cycle, so that the liquid refrigerant accumulated in the indoor heat exchanger is evaporated in the outdoor heat exchanger, and the gas refrigerant is sucked into the compressor.
又、冷房運転開始時にも室内外の温度を比較して室内温
度が低い場合には逆に暖房サイクル運転を所定時間だけ
行なって室内熱交換器の寝込み冷媒を一旦室外熱交換器
に溜め込むことにより、上述の暖房運転開始時と同様、
圧縮機にはガス冷媒が吸い込まれる。Also, when starting the cooling operation, the indoor and outdoor temperatures are compared, and if the indoor temperature is low, the heating cycle operation is performed for a predetermined period of time to temporarily store the refrigerant in the indoor heat exchanger in the outdoor heat exchanger. , same as when starting the heating operation mentioned above.
Gas refrigerant is sucked into the compressor.
（へ）実施例
第１図は本発明の実施例を示すヒートポンプ式空気調和
機の説明図で、（１）は能力可変型圧縮機（２）と四方
切換弁（３）と室外熱交換器（４）と毛細管等の減圧素
子（５）とアキュームレータ（６）とを内蔵した室外ユ
ニット、（７）は室内熱交換器（８）を内蔵した室内ユ
ニットで、これら機器はユニット間配管（９ａ）（９ｂ
）を介して図示の如く接続されている。(f) Embodiment Figure 1 is an explanatory diagram of a heat pump type air conditioner showing an embodiment of the present invention. (1) shows a variable capacity compressor (2), a four-way switching valve (3), and an outdoor heat exchanger. (4) is an outdoor unit with a built-in pressure reducing element (5) such as a capillary tube and an accumulator (6), and (7) is an indoor unit with a built-in indoor heat exchanger (8). These devices are connected to the inter-unit piping (9a). )(9b
) are connected as shown in the figure.
（１０）は室内温度を検出する室温検出器、（１１）は
室外温度を検出する外気温検出器、（１２）はこの雨検
出器（１０）（１１）からの信号を入力することにより
室内温度と室外温度とを比較して圧縮機（２）の起動か
ら１分間だけ四方切換弁（３）を逆サイクルに切換える
と共に、室内ファン（１３）と室外ファン（１４）の運
転を停止させる制御装置、（１５）はこの制御装置から
の出力信号を受け、室温検出器（１０）による室内温度
と設定温度との差に応じて圧縮機（２）の運転周波数を
変えるインバータ装置である。(10) is a room temperature detector that detects the indoor temperature, (11) is an outside temperature detector that detects the outdoor temperature, and (12) is a rain detector that detects the indoor temperature by inputting signals from (10) and (11). Control that compares the temperature with the outdoor temperature and switches the four-way selector valve (3) to the reverse cycle for one minute from the start of the compressor (2), and stops the operation of the indoor fan (13) and outdoor fan (14). The device (15) is an inverter device that receives an output signal from this control device and changes the operating frequency of the compressor (2) according to the difference between the indoor temperature detected by the room temperature detector (10) and the set temperature.
次に制御動作を第２図に基づいて説明する。暖房運転ス
イッチの投入時、設定値が室内温度よりも高く、且つ、
室温検出器（１０）と外気温検出器（１１）からの信号
を入力して室外温度が室内温度よりも低い場合には制御
装置（１２）からの出力で圧縮機（２）のみが通電され
てインバータ装置（１５）により大能力で起動されると
共に、四方切換弁（３）及び室内外のファン（１３）（
１４）には通電されず、四方切換弁（３）は破線状態に
切換えられるため、圧縮機（２）から吐出された冷媒が
四方切換弁（３）を経て室外熱交換器（４）へ流れ込ん
で室外熱交換器（４）に暖房運転の停止中に寝込んでい
た液冷媒を追い出して減圧素子（５）を経て室内熱交換
器（８〉に溜め込む逆サイクル（冷房サイクル）運転が
行なわれる。Next, the control operation will be explained based on FIG. 2. When the heating operation switch is turned on, the set value is higher than the indoor temperature, and
When the signals from the room temperature detector (10) and the outside temperature detector (11) are input and the outdoor temperature is lower than the indoor temperature, only the compressor (2) is energized by the output from the control device (12). The inverter device (15) starts the operation at high capacity, and the four-way switching valve (3) and the indoor/outdoor fan (13) (
14) is not energized and the four-way switching valve (3) is switched to the broken line state, so the refrigerant discharged from the compressor (2) flows into the outdoor heat exchanger (4) via the four-way switching valve (3). Then, a reverse cycle (cooling cycle) operation is performed in which the liquid refrigerant that had been trapped in the outdoor heat exchanger (4) during the stoppage of the heating operation is expelled and stored in the indoor heat exchanger (8>) via the pressure reducing element (5).
かかる逆サイクル運転時、室内ファン（１３）は停止し
ているので、室内へ冷風が吹出すことはなく、且つ室外
ファン（１４）の停止により室外熱交換器（４）は圧縮
機（２）の吐出高温ガスで温められるので冷媒が凝縮さ
れることはない。そして、圧縮機（２）の起動後、１分
経過すると制御装置（１２）の出力により四方切換弁（
３）が通電されて実線状態に切換えられると共に室内外
のファン（１３）（１４）が運転されて暖房運転が開始
すると、室内熱交換器（８）に溜まり込んでいた冷媒が
室外熱交換器（４）を通る際、上述の逆サイクル運転時
に温められ゛た熱分も加わって冷媒が蒸発し、圧縮機（
２）にはアキュームレータ（６）からガス冷媒が吸い込
まれる。During this reverse cycle operation, the indoor fan (13) is stopped, so no cold air is blown into the room, and the outdoor heat exchanger (4) is turned off by the compressor (2) due to the outdoor fan (14) stopped. Since the refrigerant is heated by the discharged high-temperature gas, the refrigerant does not condense. Then, one minute after starting the compressor (2), the four-way switching valve (
3) is energized and switched to the solid line state, and the indoor and outdoor fans (13) and (14) are operated to start heating operation, and the refrigerant accumulated in the indoor heat exchanger (8) is transferred to the outdoor heat exchanger. When passing through (4), the heat heated during the above-mentioned reverse cycle operation is added, causing the refrigerant to evaporate, and the compressor (
Gas refrigerant is sucked into 2) from the accumulator (6).
尚、冷房運転スイッチの投入時、室外温度が室内温度と
同じか、もしくは室内温度よりも高い場合は室外熱交換
器（４）に冷媒が寝込んでいないため、制御装置く１２
）の出力により、圧縮機（２）の起動と同時に四方切換
弁（３）が通電されて実線状態に切換わると共に室内外
のファン（１３）（１４）が運転されて暖房運転がすぐ
に開始される。Note that when the cooling operation switch is turned on, if the outdoor temperature is the same as the indoor temperature or higher than the indoor temperature, there is no refrigerant in the outdoor heat exchanger (4), so the control device 12
), the four-way switching valve (3) is energized at the same time as the compressor (2) is started, switching to the solid line state, and the indoor and outdoor fans (13) and (14) are operated to immediately start heating operation. be done.
又、暖房運転スイッチの投入時、設定値が室内温度より
も低く、且つ、室内温度が室外温度よりも低い場合には
制御装置（１２）からの出力で圧縮機（２）と四方切換
弁（３）とが通電されて圧縮機（２）がインバータ装置
（１５）により大能力で起動されると共に四方切換弁（
３）が実線状態に切換えられるため、圧縮機（２）から
吐出された冷媒が四方切換弁（３）を経て室内熱交換器
（８）へ流れ込んで室内熱交換器（８）に冷房運転の停
止中に寝込んでいた液冷媒を追い出して減圧素子（５）
を経て室外熱交換器（４）に溜め込む逆サイクル（暖房
サイクル）運転が行なわれる。かかる逆サイクル運転時
、室内ファン（１３）は停止しているので、室内へ温風
が吹出さないと共に室内熱交換器（８）で冷媒が凝縮せ
ず、且つ室外ファン（１４）の停止により室外熱交換器
（４）には液状態で冷媒が溜まり込む。そして、圧縮機
（２）の起動後、１分経過すると、制御装置（１２）の
出力信号により四方切換弁（３）は通電が止まって破線
状態に切換えられると共に室内外のファン（１３）（１
４）が運転されて冷房運転が開始すると、室外熱交換器
（４）に溜まり込んでいた液冷媒が室内熱交換器（８）
を通る際、上述の逆サイクル運転時に温められた熱分も
加わって冷媒が蒸発し、圧縮機（２）にはアキュームレ
ータ（６）からガス冷媒が吸い込まれる。In addition, when the heating operation switch is turned on, if the set value is lower than the indoor temperature and the indoor temperature is lower than the outdoor temperature, the output from the control device (12) is used to switch between the compressor (2) and the four-way switching valve ( 3) is energized, the compressor (2) is started at high capacity by the inverter device (15), and the four-way switching valve (
3) is switched to the solid line state, the refrigerant discharged from the compressor (2) flows into the indoor heat exchanger (8) via the four-way switching valve (3), and the indoor heat exchanger (8) is switched to the state of the cooling operation. Pressure reducing element (5) removes the liquid refrigerant that was trapped during the stoppage.
A reverse cycle (heating cycle) operation is performed in which the heat is stored in the outdoor heat exchanger (4). During such reverse cycle operation, the indoor fan (13) is stopped, so hot air is not blown into the room, the refrigerant is not condensed in the indoor heat exchanger (8), and the outdoor fan (14) is stopped. Refrigerant accumulates in a liquid state in the outdoor heat exchanger (4). Then, one minute after starting the compressor (2), the output signal from the control device (12) causes the four-way switching valve (3) to stop energizing and switch to the broken line state, and the indoor/outdoor fan (13) ( 1
4) is operated and cooling operation starts, the liquid refrigerant accumulated in the outdoor heat exchanger (4) is transferred to the indoor heat exchanger (8).
When passing through, the refrigerant evaporates due to the heat heated during the above-mentioned reverse cycle operation, and the gas refrigerant is sucked into the compressor (2) from the accumulator (6).
尚、冷房運転スイッチの投入時、室内温度が室外温度と
同じか、もしくは室外温度よりも高い場合は室内熱交換
器（８）に冷媒が寝込んでいないため、制御装置（１２
）からの出力で圧縮機（２）の起動と同時に室内外のフ
ァン（１３）（１４）が運転されると共に四方切換弁（
３）は非通電により破線状態に設定され、冷房運転がす
ぐに開始される。Note that when the cooling operation switch is turned on, if the indoor temperature is the same as the outdoor temperature or higher than the outdoor temperature, there is no refrigerant in the indoor heat exchanger (8), so the control device (12)
), the indoor and outdoor fans (13) and (14) are operated simultaneously with the start of the compressor (2), and the four-way switching valve (
3) is set to the broken line state due to de-energization, and cooling operation is immediately started.
又、送風運転スイッチが投入された場合は室内ファン（
１３）のみが通電されて送風運転が行なわれる。Also, if the blower operation switch is turned on, the indoor fan (
Only 13) is energized and air blowing operation is performed.
尚、上記実施例では冷暖房の運転開始時に室内温度と室
外温度とを検出するようにしたが、この代わりに運転停
止中の室内温度と室外温度とを夫々積算してこの両積算
値を比較すれば、運転の停止中に室内外の両熱交換器の
どちらに冷媒が寝込んでいるか、より一層確実に２かむ
ことができる。In the above embodiment, the indoor temperature and outdoor temperature are detected when the heating and cooling system starts operating, but instead of this, the indoor temperature and outdoor temperature may be integrated while the air conditioner is not operating, and these two integrated values may be compared. For example, it is possible to more reliably determine in which of the indoor and outdoor heat exchangers the refrigerant is trapped while the operation is stopped.
（ト）発明の効果
本発明によれば、冷房及び／又は暖房の運転開始時に室
内温度と室外温度とを検出して、運転の停止中に室内外
の熱交換器のどちらに冷媒が寝込んでいるかを判別して
逆サイクル運転を行なうようにしたので、不必要に逆サ
イクル運転が行なわれるのを防止することができる。(G) Effects of the Invention According to the present invention, the indoor temperature and outdoor temperature are detected at the start of cooling and/or heating operation, and the refrigerant is detected in either the indoor or outdoor heat exchanger while the operation is stopped. Since the reverse cycle operation is performed after determining whether the vehicle is running, it is possible to prevent the reverse cycle operation from being performed unnecessarily.
しかも、運転の停止中に室内又は室外の熱交換器に寝込
んだ液冷媒を上述の逆サイクル運転により一旦室外又は
室内の熱交換器に溜め込むようにしたので、運転開始時
に圧縮機に液冷媒が吸入されて液圧縮やオイルフォーミ
ングが発生し圧縮機が破損するのを防止することができ
る。Moreover, since the liquid refrigerant that has settled in the indoor or outdoor heat exchanger during the stoppage of operation is temporarily stored in the outdoor or indoor heat exchanger by the above-mentioned reverse cycle operation, the liquid refrigerant is supplied to the compressor when the operation is started. This can prevent damage to the compressor due to liquid compression and oil forming caused by suction.
第１図は本発明の実施例を示すヒートポンプ式空気調和
機の説明図、第２図はその制御動作を示すフローチャー
トである。
（２）・・・圧縮機、 （３）・・・四方切換弁、 （
４）・・・室外熱交換器、 （８）・・・室内熱交換器
、 （１０）・・・室温検出器、 （１１）・・・外気
温検出器、 （１２〉・・・制御装置。
出願人 三洋電機株式会社外１名
代理人 弁理士 西野卓嗣 外１名
ｕ１図
ｗ＆２図FIG. 1 is an explanatory diagram of a heat pump type air conditioner showing an embodiment of the present invention, and FIG. 2 is a flowchart showing its control operation. (2)...Compressor, (3)...Four-way switching valve, (
4)...Outdoor heat exchanger, (8)...Indoor heat exchanger, (10)...Room temperature detector, (11)...Outside temperature detector, (12>...Control device Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Takuji Nishino U1 drawing w & 2 drawing
Claims (2)
交換器に冷媒を可逆的に通すための四方切換弁を有し、
この四方切換弁の切換えにより冷房サイクルと暖房サイ
クルとを形成するヒートポンプ式空気調和機において、
冷房及び／又は暖房の運転開始時に室内温度と室外温度
とを比較して圧縮機の起動から所定時間だけ四方切換弁
を逆サイクルに切換える制御装置を設けたことを特徴と
するヒートポンプ式空気調和機。(1) It has a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a four-way switching valve for reversibly passing refrigerant through both heat exchangers,
In a heat pump air conditioner that forms a cooling cycle and a heating cycle by switching this four-way switching valve,
A heat pump type air conditioner characterized by being equipped with a control device that compares indoor temperature and outdoor temperature at the start of cooling and/or heating operation and switches a four-way switching valve to a reverse cycle for a predetermined period of time from the start of a compressor. .
第１項記載のヒートポンプ式空気調和機。(2) The heat pump air conditioner according to claim 1, wherein the compressor is a variable capacity compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27465686A JPH0726769B2 (en) | 1986-11-18 | 1986-11-18 | Heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27465686A JPH0726769B2 (en) | 1986-11-18 | 1986-11-18 | Heat pump type air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63129257A true JPS63129257A (en) | 1988-06-01 |
| JPH0726769B2 JPH0726769B2 (en) | 1995-03-29 |
Family
ID=17544727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27465686A Expired - Lifetime JPH0726769B2 (en) | 1986-11-18 | 1986-11-18 | Heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0726769B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010223493A (en) * | 2009-03-23 | 2010-10-07 | Toshiba Carrier Corp | Air conditioner |
| WO2019087621A1 (en) | 2017-10-30 | 2019-05-09 | ダイキン工業株式会社 | Air conditioner |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018037466A1 (en) * | 2016-08-22 | 2018-03-01 | 三菱電機株式会社 | Refrigeration cycle device |
-
1986
- 1986-11-18 JP JP27465686A patent/JPH0726769B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010223493A (en) * | 2009-03-23 | 2010-10-07 | Toshiba Carrier Corp | Air conditioner |
| WO2019087621A1 (en) | 2017-10-30 | 2019-05-09 | ダイキン工業株式会社 | Air conditioner |
| JP2019082278A (en) * | 2017-10-30 | 2019-05-30 | ダイキン工業株式会社 | Air conditioner |
| CN111279139A (en) * | 2017-10-30 | 2020-06-12 | 大金工业株式会社 | Air conditioner |
| CN111279139B (en) * | 2017-10-30 | 2021-06-29 | 大金工业株式会社 | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0726769B2 (en) | 1995-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |