JP2891576B2 - Heat pump type air conditioner - Google Patents
Heat pump type air conditionerInfo
- Publication number
- JP2891576B2 JP2891576B2 JP28192391A JP28192391A JP2891576B2 JP 2891576 B2 JP2891576 B2 JP 2891576B2 JP 28192391 A JP28192391 A JP 28192391A JP 28192391 A JP28192391 A JP 28192391A JP 2891576 B2 JP2891576 B2 JP 2891576B2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- outside air
- fan motor
- air conditioner
- fan
- 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
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はヒートポンプ式空気調和
機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type air conditioner.
【０００２】[0002]
【従来の技術】従来のヒートポンプ式空気調和機の冷媒
回路の１例が図２に示されている。冷房運転時、圧縮機
１から吐出された高温・高圧のガス冷媒は、実線矢印で
示すように、四方切換弁２を経て室外熱交換器３に入
り、ここでフアンモータ９で駆動される室外フアン10に
よって送風される外気に放熱することによって凝縮液化
して高圧の液冷媒となる。この液冷媒は膨張弁等の絞り
機構４を流過する過程で絞られることによって断熱膨張
して低温・低圧の気液二相となる。次いで、この冷媒は
室内熱交換器５に入り、ここでフアンモータ11で駆動さ
れる室内フアン12によって送風される室内空気から吸熱
することによって蒸発気化して低温・低圧のガス冷媒と
なり、四方切換弁２、アキュムレ−タ６を経て圧縮機１
に戻り、以後上記を繰り返す。2. Description of the Related Art FIG. 2 shows an example of a refrigerant circuit of a conventional heat pump type air conditioner. During the cooling operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 enters the outdoor heat exchanger 3 via the four-way switching valve 2 as shown by a solid arrow, and the outdoor refrigerant is driven by the fan motor 9 here. By radiating heat to the outside air blown by the fan 10, it is condensed and liquefied to become a high-pressure liquid refrigerant. This liquid refrigerant is adiabatically expanded by being throttled in the course of flowing through the expansion mechanism 4 such as an expansion valve, and becomes a low-temperature, low-pressure gas-liquid two-phase. Next, the refrigerant enters the indoor heat exchanger 5, where the refrigerant absorbs heat from the indoor air blown by the indoor fan 12 driven by the fan motor 11, evaporates and evaporates to a low-temperature / low-pressure gas refrigerant, and is switched in four directions. Compressor 1 via valve 2 and accumulator 6
And the above is repeated thereafter.
【０００３】暖房運転時、圧縮機１から吐出された冷媒
は、破線矢印で示すように、四方切換弁２を経て室内熱
交換器５に入り、ここで凝縮液化し、絞り機構４で断熱
膨張し、室外熱交換器３で蒸発気化した後四方切換弁
２、アキュムレ−タ６を経て圧縮機１に戻る。なお、図
２において、７は圧縮機１に供給される電流の周波数を
変更するインバータである。室内熱交換器用フアン12を
駆動するフアンモータ11は図示しない制御装置の変速ス
イッチを切り換えることによって高速・中速・低速の３
段に切り換えうるようになっている。また、室外熱交換
器用フアン10を駆動するフアンモータ９は一定の速度で
回転するようになっている。During the heating operation, the refrigerant discharged from the compressor 1 enters the indoor heat exchanger 5 via the four-way switching valve 2 as shown by the dashed arrow, where it is condensed and liquefied. Then, after being evaporated and vaporized in the outdoor heat exchanger 3, the refrigerant returns to the compressor 1 via the four-way switching valve 2 and the accumulator 6. In FIG. 2, reference numeral 7 denotes an inverter for changing the frequency of the current supplied to the compressor 1. The fan motor 11 for driving the fan 12 for the indoor heat exchanger is switched between a high speed, a medium speed and a low speed by switching a shift switch of a control device (not shown).
It can be switched to a stage. Further, the fan motor 9 for driving the outdoor heat exchanger fan 10 rotates at a constant speed.
【０００４】[0004]
【発明が解決しようとする課題】上記従来のヒートポン
プ式空気調和機においては、その暖房運転時、外気温が
異常に高くなると、室外熱交換器３の吸熱量が大きくな
るため、その出口における冷媒の過熱度が増大し、これ
に伴って圧縮機１に吸入される冷媒ガスの温度が上昇す
るので圧縮機１が過熱される。また、室外熱交換器３の
吸熱量が大きくなると、冷媒回路中の高圧が上昇するの
で圧縮機１の吐出圧が高くなり、これに伴って圧縮機１
の負荷が増大するので、これによっても圧縮機１が過熱
される。一方、冷房運転時に外気温が異常に高くなる
と、冷媒の凝縮圧力が高くなり、これに伴って冷媒回路
中の高圧が上昇するため圧縮機１の吐出圧が上昇して、
圧縮機１の負荷が増大するので圧縮機１が過熱される。
そして、圧縮機１が過熱されると、圧縮機１が異常停止
してしまうという不具があった。In the above-mentioned conventional heat pump type air conditioner, when the outside air temperature becomes abnormally high during the heating operation, the amount of heat absorbed by the outdoor heat exchanger 3 increases, so that the refrigerant at the outlet thereof Of the refrigerant gas increases, and the temperature of the refrigerant gas sucked into the compressor 1 rises accordingly, so that the compressor 1 is overheated. Further, when the amount of heat absorbed by the outdoor heat exchanger 3 increases, the high pressure in the refrigerant circuit increases, so that the discharge pressure of the compressor 1 increases.
, The compressor 1 is also overheated. On the other hand, if the outside air temperature becomes abnormally high during the cooling operation, the condensing pressure of the refrigerant will increase, and the high pressure in the refrigerant circuit will increase accordingly, so that the discharge pressure of the compressor 1 will increase.
Since the load on the compressor 1 increases, the compressor 1 is overheated.
When the compressor 1 is overheated, the compressor 1 stops abnormally.
【０００５】[0005]
【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、その要旨とすると
ころは、可変速モータによって駆動される室内熱交換器
用フアン及び室外熱交換器用フアンを備えたヒートポン
プ式空気調和機において、外気温度を検出する外気温セ
ンサを設置するとともに冷房運転時に外気温が第１の設
定温度以上のときは上記室外熱交換器用フアンモータを
増速し、暖房運転時に外気温が第２の設定温度以上のと
きは上記室内熱交換器用フアンモータを増速する制御装
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
にある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its gist is to provide a fan for an indoor heat exchanger driven by a variable speed motor and an outdoor heat exchanger. In a heat pump type air conditioner equipped with a fan for fan, an outside air temperature sensor for detecting the outside air temperature is installed, and when the outside air temperature is equal to or higher than a first set temperature during a cooling operation, the fan motor for the outdoor heat exchanger is accelerated. A heat pump air conditioner is provided with a control device for increasing the speed of the fan for the indoor heat exchanger when the outside air temperature is equal to or higher than the second set temperature during the heating operation.
【０００６】[0006]
【作用】本発明においては、上記構成を具えているた
め、冷房運転時に外気温が第１の設定温度以上のときは
室外熱交換器用フアンモータが増速されるので、室外熱
交換器の凝縮能力が増大して凝縮圧力が高くなるのを阻
止する。また、暖房運転時に外気温が第２の設定温度以
上のときは室内熱交換器用フアンモータが増速されるの
で、室内熱交換器の凝縮能力が増大し、凝縮圧力、即
ち、冷媒回路中の高圧を低下させる。In the present invention, since the above configuration is provided, the fan motor for the outdoor heat exchanger is accelerated when the outside air temperature is equal to or higher than the first set temperature during the cooling operation. Increased capacity prevents higher condensation pressures. Further, when the outside air temperature is equal to or higher than the second set temperature during the heating operation, the speed of the indoor heat exchanger fan motor is increased, so that the condensing capacity of the indoor heat exchanger increases, and the condensing pressure, that is, the refrigerant pressure in the refrigerant circuit is increased. Reduce high pressure.
【０００７】[0007]
【実施例】以下、本発明の１実施例を図１に示す制御ブ
ロック図を参照しながら具体的に説明する。なお、冷媒
回路は図２に示す従来のものと同様であるが、室内熱交
換器５用フアンモータ11及び室外熱交換器３用フアンモ
ータ９は可変速モータとされている。外気温度を検出す
る外気温センサ21で検出された外気温は制御装置20の比
較手段22に入力され、ここで温度設定手段23から入力さ
れた第１又は第２の設定温度と比較される。比較結果は
フアンモータ速度決定手段24に入力される。このフアン
モータ速度決定手段24には冷房・暖房切換スイッチ25の
出力が入力される。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to a control block diagram shown in FIG. The refrigerant circuit is the same as the conventional one shown in FIG. 2, but the fan motor 11 for the indoor heat exchanger 5 and the fan motor 9 for the outdoor heat exchanger 3 are variable speed motors. The outside air temperature detected by the outside air temperature sensor 21 for detecting the outside air temperature is inputted to the comparing means 22 of the control device 20, where it is compared with the first or second set temperature inputted from the temperature setting means 23. The comparison result is input to the fan motor speed determining means 24. The output of the cooling / heating changeover switch 25 is input to the fan motor speed determining means 24.
【０００８】しかして、冷房運転時、外気温が第１の設
定温度以上のときフアンモータ速度決定手段24は室外熱
交換器用フアンモータ９を増速する旨を決定し、この決
定結果は出力手段26を経て室外熱交換器用フアンモータ
９に出力される。暖房運転時、外気温が第２の設定温度
以上のときフアンモータ速度決定手段24は室内熱交換器
用フアンモータ11を増速する旨を決定し、この決定結果
は出力手段27を経て室内熱交換器用フアンモータ11に出
力される。During the cooling operation, when the outside air temperature is equal to or higher than the first set temperature, the fan motor speed determining means 24 determines to increase the speed of the fan motor 9 for the outdoor heat exchanger. It is output to the outdoor heat exchanger fan motor 9 via 26. During the heating operation, when the outside air temperature is equal to or higher than the second set temperature, the fan motor speed determining means 24 determines that the speed of the fan motor 11 for the indoor heat exchanger is to be increased. Output to the dexterous fan motor 11.
【０００９】[0009]
【発明の効果】本発明においては、冷房運転時に外気温
が第１の設定温度以上のときは室外熱交換器用フアンモ
ータが増速されるので、室外熱交換器の凝縮能力が増大
して凝縮圧力が高くなるのを阻止する。また、暖房運転
時に外気温が第２の設定温度以上のときは室内熱交換器
用フアンモータが増速されるので、室内熱交換器の凝縮
能力が増大し、凝縮圧力、即ち、冷媒回路中の高圧を低
下させる。この結果、冷房運転時及び暖房運転時に外気
温が異常に高い場合であっても圧縮機の過熱を防止する
ことができ、かくして、圧縮機の異常停止を防止して空
気調和機の運転を継続することが可能となる。According to the present invention, when the outside air temperature is equal to or higher than the first set temperature during the cooling operation, the fan motor for the outdoor heat exchanger is increased in speed, so that the condensation capacity of the outdoor heat exchanger is increased and the condensation is performed. Prevent pressure build up. Further, when the outside air temperature is equal to or higher than the second set temperature during the heating operation, the speed of the indoor heat exchanger fan motor is increased, so that the condensing capacity of the indoor heat exchanger increases, and the condensing pressure, that is, the refrigerant pressure in the refrigerant circuit is increased. Reduce high pressure. As a result, even if the outside air temperature is abnormally high during the cooling operation and the heating operation, it is possible to prevent the compressor from overheating, thereby preventing the compressor from stopping abnormally and continuing the operation of the air conditioner. It is possible to do.
【図１】本発明の１実施例を示す制御ブロック図であ
る。FIG. 1 is a control block diagram showing one embodiment of the present invention.
【図２】ヒートポンプ式空気調和機の冷媒回路図であ
る。FIG. 2 is a refrigerant circuit diagram of the heat pump type air conditioner.
11 室内熱交換器用フアンモータ ９ 室外熱交換器用フアンモータ 20 制御装置 21 外気温センサ 23 温度設定手段 22 比較手段 25 冷房・暖房切換スイッチ 24 フアンモータ速度決定手段 26、27 出力手段 11 Fan motor for indoor heat exchanger 9 Fan motor for outdoor heat exchanger 20 Control device 21 Outside air temperature sensor 23 Temperature setting means 22 Comparison means 25 Cooling / heating switching switch 24 Fan motor speed determination means 26, 27 Output means
Claims (1)
交換器用フアン及び室外熱交換器用フアンを備えたヒー
トポンプ式空気調和機において、外気温度を検出する外
気温センサを設置するとともに冷房運転時に外気温が第
１の設定温度以上のときは上記室外熱交換器用フアンモ
ータを増速し、暖房運転時に外気温が第２の設定温度以
上のときは上記室内熱交換器用フアンモータを増速する
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。In a heat pump type air conditioner having a fan for an indoor heat exchanger and a fan for an outdoor heat exchanger driven by a variable speed motor, an outside air temperature sensor for detecting an outside air temperature is installed, and an outside air temperature sensor for a cooling operation. The controller increases the fan motor for the outdoor heat exchanger when the temperature is equal to or higher than the first set temperature, and increases the fan motor for the indoor heat exchanger when the outdoor temperature is equal to or higher than the second set temperature during the heating operation. A heat pump type air conditioner characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28192391A JP2891576B2 (en) | 1991-10-03 | 1991-10-03 | Heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28192391A JP2891576B2 (en) | 1991-10-03 | 1991-10-03 | Heat pump type air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0599520A JPH0599520A (en) | 1993-04-20 |
| JP2891576B2 true JP2891576B2 (en) | 1999-05-17 |
Family
ID=17645836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28192391A Expired - Lifetime JP2891576B2 (en) | 1991-10-03 | 1991-10-03 | Heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2891576B2 (en) |
-
1991
- 1991-10-03 JP JP28192391A patent/JP2891576B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0599520A (en) | 1993-04-20 |
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