JP3241189B2 - Heat pump type air conditioner - Google Patents
Heat pump type air conditionerInfo
- Publication number
- JP3241189B2 JP3241189B2 JP24865793A JP24865793A JP3241189B2 JP 3241189 B2 JP3241189 B2 JP 3241189B2 JP 24865793 A JP24865793 A JP 24865793A JP 24865793 A JP24865793 A JP 24865793A JP 3241189 B2 JP3241189 B2 JP 3241189B2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- air conditioner
- temperature
- outdoor
- zone
- 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
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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0294—Control issues related to the outdoor fan, e.g. controlling speed
Landscapes
- Air Conditioning Control Device (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１例
が図２ないし図５に示されている。図２に示すように、
空気調和機の暖房運転時、インバータ駆動圧縮機１から
吐出された冷媒は、実線矢印で示すように、四方弁２、
室内熱交換器３、電動膨張弁４、室外熱交換器５、四方
弁２をこの順に経て圧縮機１に戻る。2. Description of the Related Art An example of a conventional heat pump type air conditioner is shown in FIGS. As shown in FIG.
During the heating operation of the air conditioner, the refrigerant discharged from the inverter-driven compressor 1, as shown by the solid arrow, four-way valve 2,
It returns to the compressor 1 through the indoor heat exchanger 3, the electric expansion valve 4, the outdoor heat exchanger 5, and the four-way valve 2 in this order.
【０００３】冷房運転時には、四方弁２が上記と逆に切
り換えられるので、圧縮機１から吐出された冷媒は、破
線矢印で示すように、四方弁２、室外熱交換器５、電動
膨張弁４、室内熱交換器５、四方弁２をこの順に経て圧
縮機１に戻る。During the cooling operation, the four-way valve 2 is switched in the opposite manner as described above, so that the refrigerant discharged from the compressor 1 is subjected to the four-way valve 2, the outdoor heat exchanger 5, the electric expansion valve Then, the refrigerant returns to the compressor 1 through the indoor heat exchanger 5 and the four-way valve 2 in this order.
【０００４】圧縮機１はインバータ６から供給された空
気調和機の負荷に対応する周波数の電流により駆動され
る。センサ８により検出された圧縮機１の吐出管温度ｔ
d は制御器７に入力され、制御器７は電動膨張弁４に出
力して吐出管温度ｔd が目標ゾーン内に維持されるよう
に電動膨張弁４の開度をフィードバック制御している。[0004] The compressor 1 is driven by a current having a frequency corresponding to the load of the air conditioner supplied from the inverter 6. Discharge pipe temperature t of compressor 1 detected by sensor 8
d is inputted to the controller 7, the controller 7 is feedback controlling the opening of the electric expansion valve 4 as the discharge-pipe temperature t d and outputs the electric expansion valve 4 is maintained within the target zone.
【０００５】図３に示すように、吐出管温度ｔd の5deg
℃刻みに複数個の温度ゾーンが定められ、そのそれぞれ
に個別の記号Ａ〜Ｊが付されている。インバータ６から
圧縮機１に供給される電流の周波数、センサ９によって
検出された外気温度等に対応して目標とする温度ゾーン
が決められる。[0005] As shown in FIG. 3, 5 deg discharge pipe temperature t d
A plurality of temperature zones are defined in increments of ° C., and each of them is given an individual symbol A to J. The target temperature zone is determined according to the frequency of the current supplied from the inverter 6 to the compressor 1, the outside air temperature detected by the sensor 9, and the like.
【０００６】しかして、サンプリングタイム、例えば、
60秒毎に吐出管温度ｔd がセンサ８によって検出され、
図４に示すように、吐出管温度ｔd が目標温度ゾーン内
にあるときは電動膨張弁４の開度は現状のまま保持され
るが、吐出管温度ｔd が目標温度ゾーンより高位の温度
ゾーン内にあるときには、電動膨張弁４の開度は大とさ
れ、吐出管温度ｔd が目標温度ゾーンをより低位の温度
ゾーン内にあるときには電動膨張弁４の開度は小とされ
る。Thus, the sampling time, for example,
Discharge pipe temperature t d every 60 seconds is detected by the sensor 8,
As shown in FIG. 4, the discharge pipe temperature t d is but the opening degree of the electronic expansion valve 4 when in the target temperature zone is kept as is, the discharge pipe temperature t d is a high position than the target temperature zone when in the temperature zone, the opening degree of the electronic expansion valve 4 is large, the opening degree of the electronic expansion valve 4 when the discharge-pipe temperature t d is a target temperature zone more in the low position the temperature zones is small You.
【０００７】この空気調和機の暖房運転時、低外気温、
高湿度の場合には室外熱交換器５の表面に外気中の水分
が氷結して着霜する。すると、室外熱交換器５を流過す
る外気の流過抵抗が増加し、これに伴って室外熱交換器
５を流過する外気の風量が低下し、これに応じて室外熱
交換器５の表面温度が低下するので、着霜が更に促進さ
れる。そして、室外熱交換器５への着霜が進行すると、
冷媒の蒸発温度が低下し、これに伴って図５に示すよう
に室外熱交換器５の吸熱量が低下して暖房能力が低下す
るとともに圧縮機１に吸入される冷媒の温度が低下する
ので吐出管温度Ｔd も低下する。At the time of heating operation of this air conditioner, low outside air temperature,
In the case of high humidity, the moisture in the outside air freezes on the surface of the outdoor heat exchanger 5 to form frost. Then, the flow resistance of the outside air flowing through the outdoor heat exchanger 5 increases, and the airflow of the outside air flowing through the outdoor heat exchanger 5 decreases accordingly. Since the surface temperature is reduced, frost formation is further promoted. Then, when frost formation on the outdoor heat exchanger 5 progresses,
Since the evaporation temperature of the refrigerant decreases, the amount of heat absorbed by the outdoor heat exchanger 5 decreases as shown in FIG. 5 to decrease the heating capacity and the temperature of the refrigerant sucked into the compressor 1 decreases. The discharge pipe temperature Td also decreases.
【０００８】[0008]
【発明が解決しようとする課題】上記従来の空気調和機
においては、その暖房運転時、室外熱交換器５に着霜し
始めると、着霜が急速に進行して暖房能力が低下してし
まうので、頻繁にデフロスト運転を行う必要があり、こ
のデフロスト運転によって空調フィーリングが阻害され
るという問題があった。In the conventional air conditioner described above, when frost starts to form on the outdoor heat exchanger 5 during the heating operation, the frost rapidly progresses and the heating capacity is reduced. Therefore, it is necessary to frequently perform the defrost operation, and there is a problem that the air conditioning feeling is hindered by the defrost operation.
【０００９】[0009]
【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、インバータ駆動圧縮機、室外熱交換器、電動膨
張弁及び室内熱交換器により冷凍サイクルを構成し、上
記インバータ駆動圧縮機に供給される電流の周波数及び
上記室外熱交換器に供給される外気の温度に基づいて目
標温度ゾーンを決定し、上記膨張弁開度を増減すること
により上記圧縮機の吐出管温度を上記目標温度ゾーン内
に維持するヒートポンプ式空気調和機において、暖房運
転時、吐出管温度が上記目標温度ゾーンより予め設定さ
れたゾーン差だけ低くなったとき、上記室外熱交換器に
外気を送風するための室外フアンの回転数を増大させる
フアン制御手段を具備する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 problems, and its gist is to provide an inverter driven compressor, an outdoor heat exchanger, an electric expansion valve, and an indoor heat exchanger. the exchanger constitute a refrigeration cycle, the upper
The frequency of the current supplied to the inverter-driven compressor and
Based on the temperature of the outside air supplied to the outdoor heat exchanger,
Determining the target temperature zone, the heat pump type air conditioner to maintain the discharge pipe temperature of the compressor within the target temperature zone by increasing or decreasing the expansion valve, the heating operation, the discharge pipe temperature the target A heat pump type air conditioner, comprising: fan control means for increasing the rotation speed of an outdoor fan for sending outside air to the outdoor heat exchanger when the temperature of the outdoor heat exchanger becomes lower by a predetermined zone difference than the temperature zone. On the machine.
【００１０】[0010]
【作用】本発明においては、インバータ駆動圧縮機に供
給される電流の周波数及び室外熱交換器に供給される外
気の温度に基づいて目標温度ゾーンを決定し、空気調和
機の暖房運転時、吐出管温度が目標温度ゾーンより予め
設定されたゾーン差だけ低くなったとき、フアン制御手
段は室外フアンの回転数を増大させる。According to the present invention, an inverter driven compressor is provided.
The frequency of the supplied current and the outside supplied to the outdoor heat exchanger
The target temperature zone is determined based on the air temperature, and when the discharge pipe temperature becomes lower than the target temperature zone by a preset zone difference during the heating operation of the air conditioner, the fan control procedure is performed.
Stage Ru increases the rotational speed of the outdoor fan.
【００１１】[0011]
【実施例】本発明の１実施例が図１に示されている。制
御器７の出力はフアン制御手段10に入力され、ここでゾ
ーン差設定手段11に予め設定されたゾーン差（例えば
２）と比較される。比較の結果、吐出管温度ｔd がその
目標ゾーンより設定ゾーン差以上低い、即ち、 10deg℃
以上低いと判定されたとき、フアン制御手段10は室外熱
交換器５に外気を送風するための室外フアン12の駆動モ
ータ13に出力してその回転数を増大する。他の構成及び
作用は図２ないし図４に示す従来のものと同様であり、
対応する部材には同じ符号が付されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG. The output of the controller 7 is input to the fan control means 10, where it is compared with a zone difference (for example, 2) preset in the zone difference setting means 11. As a result of the comparison, the discharge pipe temperature t d lower than the set zone difference than its target zone, i.e., 10 deg ° C.
When it is determined that the temperature is lower than the above, the fan control means 10 outputs to the drive motor 13 of the outdoor fan 12 for blowing outside air to the outdoor heat exchanger 5 to increase the rotation speed. Other configurations and operations are the same as those of the related art shown in FIGS.
Corresponding members have the same reference characters allotted.
【００１２】[0012]
【発明の効果】本発明においては、インバータ駆動圧縮
機に供給される電流の周波数及び室外熱交換器に供給さ
れる外気の温度に基づいて目標温度ゾーンを決定し、空
気調和機の暖房運転時、吐出管温度が目標温度ゾーンよ
り予め設定されたゾーン差だけ低くなったとき、フアン
制御手段が室外フアンの回転数を増大させるため、適確
な時期に室外フアンの回転数を増大させることによって
室外熱交換器の吸熱能力を増大させることができる。こ
の結果、室外熱交換器への着霜速度を低下させることが
できるので、デフロスト運転の周期を従来のものに比較
して長くすることができ、頻繁なデフロスト運転による
暖房フィーリングの悪化を抑制できる。また、通常の暖
房運転時には室外フアンは低速で回転するので、室外フ
アンの高速回転に伴う騒音の増大を必要最少限に抑制で
きる。According to the present invention, inverter driven compression is provided.
The frequency of the current supplied to the unit and the
The target temperature zone is determined based on the temperature of the outside air to be heated, and when the discharge pipe temperature becomes lower than the target temperature zone by a preset zone difference during the heating operation of the air conditioner, the fan
Control means can increase the heat absorption capacity of the outdoor heat exchanger by increasing the rotational speed of the outdoor fan in order to increase the rotational speed of the outdoor fan, accurately a timing. As a result, the frosting rate on the outdoor heat exchanger can be reduced, so that the cycle of the defrost operation can be made longer than that of the conventional one, and the deterioration of the heating feeling due to frequent defrost operation is suppressed. it can. In addition, since the outdoor fan rotates at a low speed during the normal heating operation, an increase in noise due to the high-speed rotation of the outdoor fan can be suppressed to a minimum.
【図１】本発明の１実施例を示す系統図である。FIG. 1 is a system diagram showing one embodiment of the present invention.
【図２】従来のヒートポンプ式空気調和機の系統図であ
る。FIG. 2 is a system diagram of a conventional heat pump type air conditioner.
【図３】温度ゾーンと吐出管温度との関係を示す図であ
る。FIG. 3 is a diagram showing a relationship between a temperature zone and a discharge pipe temperature.
【図４】吐出管温度と膨張弁開度との関係を示す図であ
る。FIG. 4 is a diagram illustrating a relationship between a discharge pipe temperature and an expansion valve opening degree.
【図５】暖房運転時における吐出管温度及び室外熱交換
器の吸熱量の時間的変化を示す線図である。FIG. 5 is a diagram showing a temporal change of a discharge pipe temperature and a heat absorption amount of an outdoor heat exchanger during a heating operation.
１ インバータ駆動圧縮機 ５ 室外熱交換器 ４ 電動膨張弁 ３ 室内熱交換器 ７ 制御器 ８ 吐出管温度センサ 10 フアン制御手段 11 ゾーン差設定手段 12 室外フアン 1 Inverter driven compressor 5 Outdoor heat exchanger 4 Electric expansion valve 3 Indoor heat exchanger 7 Controller 8 Discharge pipe temperature sensor 10 Fan control means 11 Zone difference setting means 12 Outdoor fan
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F24F 11/02 102 F24F 11/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F24F 11/02 102 F24F 11/02
Claims (1)
電動膨張弁及び室内熱交換器により冷凍サイクルを構成
し、上記インバータ駆動圧縮機に供給される電流の周波
数及び上記室外熱交換器に供給される外気の温度に基づ
いて目標温度ゾーンを決定し、上記膨張弁開度を増減す
ることにより上記圧縮機の吐出管温度を上記目標温度ゾ
ーン内に維持するヒートポンプ式空気調和機において、
暖房運転時、吐出管温度が上記目標温度ゾーンより予め
設定されたゾーン差だけ低くなったとき、上記室外熱交
換器に外気を送風するための室外フアンの回転数を増大
させるフアン制御手段を具備することを特徴とするヒー
トポンプ式空気調和機。1. An inverter-driven compressor, an outdoor heat exchanger,
A refrigeration cycle is constituted by the electric expansion valve and the indoor heat exchanger, and the frequency of the current supplied to the inverter-driven compressor is
Number and the temperature of the outside air supplied to the outdoor heat exchanger.
There determines a target temperature zone, the heat pump type air conditioner to maintain the discharge pipe temperature of the compressor to the target temperature zone <br/> over the emissions by increasing or decreasing the opening degree of the expansion valve,
During the heating operation, when the discharge pipe temperature is lower by a preset zone difference from the target temperature zone, comprising a fan control means for increasing the rotational speed of the outdoor fan for blowing outdoor air to the outdoor heat exchanger A heat pump type air conditioner characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24865793A JP3241189B2 (en) | 1993-09-09 | 1993-09-09 | Heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24865793A JP3241189B2 (en) | 1993-09-09 | 1993-09-09 | Heat pump type air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0783488A JPH0783488A (en) | 1995-03-28 |
| JP3241189B2 true JP3241189B2 (en) | 2001-12-25 |
Family
ID=17181395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24865793A Expired - Lifetime JP3241189B2 (en) | 1993-09-09 | 1993-09-09 | Heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3241189B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100432723B1 (en) * | 2001-09-11 | 2004-05-24 | 주식회사 엘지이아이 | Control method for air conditioner |
| KR100432722B1 (en) * | 2001-09-11 | 2004-05-24 | 주식회사 엘지이아이 | Fan control method for air conditioner |
-
1993
- 1993-09-09 JP JP24865793A patent/JP3241189B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0783488A (en) | 1995-03-28 |
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