JPH02263054A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH02263054A JPH02263054A JP1083115A JP8311589A JPH02263054A JP H02263054 A JPH02263054 A JP H02263054A JP 1083115 A JP1083115 A JP 1083115A JP 8311589 A JP8311589 A JP 8311589A JP H02263054 A JPH02263054 A JP H02263054A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- zone
- frequency
- temp
- compressor
- 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 abstract description 37
- 230000005494 condensation Effects 0.000 claims abstract description 28
- 238000009833 condensation Methods 0.000 claims abstract description 28
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- 230000008020 evaporation Effects 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は回転速度の変えられる圧縮機を有する空気調和
機に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an air conditioner having a compressor whose rotational speed can be changed.
（ロ）従来の技術
空気調和機の従来技術としては特開昭６３−１２９２５
０号公報に記載されているように、回転速度の変えられ
る圧縮機、凝縮器、減圧装置、蒸発器とで構成したヒー
トポンプ回路における圧縮機の冷媒吐出側に冷媒の圧力
、あるいは凝縮器に冷媒の凝縮温度を検出する検知器と
、この検知器が検出した圧力、あるいは温度が設定値以
上の時前記圧縮機の回転速度を低下させて運転能力を所
定能力低下させる制御器とを備え、圧縮機の高圧側圧力
が異常に高くなることを防止しているものがある。そし
て、このような空気調和機では、能力の低下や圧縮機の
運転能力のハンチングとを極力抑えるため、前記回転速
度の低下量をできるだけ小さくしている。(b) Conventional technology The conventional technology for air conditioners is Japanese Patent Application Laid-Open No. 63-12925.
As described in Publication No. 0, in a heat pump circuit consisting of a compressor whose rotational speed can be changed, a condenser, a pressure reducing device, and an evaporator, the refrigerant pressure is applied to the refrigerant discharge side of the compressor, or the refrigerant is applied to the condenser. and a controller for reducing the rotational speed of the compressor to a predetermined capacity when the pressure or temperature detected by the detector is higher than a set value. There is something that prevents the pressure on the high pressure side of the machine from becoming abnormally high. In such an air conditioner, the amount of decrease in the rotational speed is made as small as possible in order to suppress a decrease in capacity and hunting in the operating capacity of the compressor as much as possible.
（ハ）発明が解決しようとする課題
前述した空気調和機では検知器が設定値以上の圧力、あ
るいは温度が検出した時、圧縮機の運転能力を制御器が
所定能力低下させるだけなので、運転状態の急激な変化
や、負荷の大きな変化が生じた場合、圧縮機における運
転能力の低下が間に合わず、冷媒の圧力や温度が上昇し
て圧縮機が破損に至るおそれがある。そして、冷媒の異
常に高い圧力を検出すると運転を停止させる安全装置が
設けられている場合、この安全装置により空気調和機の
運転が停止させられることがあり、この安全装置が働く
と運転が自動的には再開されないため、使用者に冷房あ
るいは暖房の中断という不快感を与える結果となってい
た。(c) Problems to be Solved by the Invention In the air conditioner described above, when the detector detects a pressure or temperature higher than the set value, the controller only reduces the operating capacity of the compressor to a predetermined capacity. If there is a sudden change in the load or a large change in the load, the operating capacity of the compressor may not be reduced in time, and the pressure and temperature of the refrigerant may rise, leading to damage to the compressor. If a safety device is installed that stops the air conditioner when it detects abnormally high pressure of the refrigerant, this safety device may stop the operation of the air conditioner. However, since the air conditioner is not restarted, the user is left with the discomfort of having to stop cooling or heating the air conditioner.
本発明は、圧縮機の破損が極力防止されるだけでなく、
前述の安全装置を働かせることなく運転が継続される空
気調和機を提供するものである。The present invention not only prevents damage to the compressor as much as possible, but also
The purpose of the present invention is to provide an air conditioner that can continue to operate without activating the above-mentioned safety device.
（ニ）課題を解決するための手段
本発明は前述した従来技術の課題を解決するために、周
波数によって回転速度の変えられる圧縮機と、凝縮器と
、減圧装置と、蒸発器と、前記凝縮器内での冷媒の凝縮
温度、または蒸発器内での冷媒の蒸発温度、あるいは冷
媒の圧力を検出する検知器と、この検知器が設定値以上
の値を検出すると前記周波数を減少させる制御器とを有
する空気調和機において、前記制御器を前記検知器の検
出した値に応じて周波数の制御量を変えるように構成し
たものである。(d) Means for Solving the Problems In order to solve the problems of the prior art described above, the present invention provides a compressor whose rotational speed can be changed depending on the frequency, a condenser, a pressure reducing device, an evaporator, and the condenser. A detector that detects the condensation temperature of the refrigerant in the evaporator, the evaporation temperature of the refrigerant in the evaporator, or the pressure of the refrigerant, and a controller that reduces the frequency when the detector detects a value higher than a set value. In the air conditioner, the controller is configured to change a frequency control amount according to a value detected by the detector.
（ホ〉作用
本発明による空気調和機では、検知器が設定値以上の値
を検出すると制御器は圧縮機の回転速度を変えるための
周波数を減少させる。制御器は検出器の検出した値に応
じて周波数の制御量を、例えば、検出器の検出した値が
前記設定値よりずっと大きな場合は制御する量を大きく
、また、前記検出値が設定値よりわずかに大きな場合は
制御する量を小さくするように、変えるものである。(E) Effect In the air conditioner according to the present invention, when the detector detects a value equal to or higher than the set value, the controller reduces the frequency for changing the rotational speed of the compressor. For example, if the value detected by the detector is much larger than the set value, the amount to be controlled is increased, and if the detected value is slightly larger than the set value, the amount to be controlled is decreased. As we do, we change.
（へ）実施例
本発明の一実施例を図面と共に説明する。第１図は本発
明による空気調和機の概略構成説明図で、この図におい
て、（１）は周波数の変化によって回転速度の変わる圧
縮機（２）と、四方切換弁（３）と、第１の弁り４）と
、第２の弁（５）と、受液器（６）と、室外熱交換器（
７）とを有する室外ユニット、（８）は室内熱交換器（
９）と、電気式膨張弁等の冷媒減圧装置（１０）とを有
する室内ユニットで、この室内熱交換器（９）は室外熱
交換器（７）とユニット間配管（１１）（１２）で接続
されている。(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration explanatory diagram of an air conditioner according to the present invention. In this figure, (1) shows a compressor (2) whose rotational speed changes according to a change in frequency, a four-way switching valve (3), and a first valve valve 4), the second valve (5), the liquid receiver (6), and the outdoor heat exchanger (
(7) is an outdoor unit having an indoor heat exchanger (
9) and a refrigerant pressure reducing device (10) such as an electric expansion valve. It is connected.
（１３）は暖房運転時室内熱交換器（９）内の冷媒の凝
縮温度を検出する検知器、（１４）は冷媒の凝縮温度に
応じて、圧縮機（２）の回転速度を変える周波数を変化
させる制御器で、この制御器はマイクロコンピュータ等
から構成され、更にこの制御器の周波数の制御は次のＡ
−Ｆの６つのゾーンによって異なっている。ここで、検
知器（１３）の検出した冷媒の凝縮温度が５４°Ｃ未満
の範囲をＡゾーン、凝縮温度が５４°Ｃ以上５６°Ｃ未
満の範囲をＢゾーン、凝縮温度が５６°Ｃ以上５８°Ｃ
未満の範囲をＣゾーン、凝縮温度が５８°Ｃ以上６０°
Ｃ未゛満の範囲をＤゾーン、凝縮温度が６０°Ｃ以上６
５°Ｃ未満の範囲をＥゾーン、凝縮温度が６５°Ｃ以上
の範囲をＦゾーンと呼び、これら各ゾーンに対応する制
御を次表に示す。(13) is a detector that detects the condensation temperature of the refrigerant in the indoor heat exchanger (9) during heating operation, and (14) is the frequency that changes the rotation speed of the compressor (2) according to the condensation temperature of the refrigerant. This controller is composed of a microcomputer, etc., and the frequency of this controller is controlled by the following A.
-Different depending on the six zones of F. Here, the range where the condensation temperature of the refrigerant detected by the detector (13) is less than 54°C is the A zone, the range where the condensation temperature is 54°C or more and less than 56°C is the B zone, and the condensation temperature is 56°C or more. 58°C
The range below is classified as C zone, and the condensing temperature is 58°C or higher and 60°C.
The range below C is D zone, and the condensing temperature is 60°C or higher6
The range where the condensation temperature is less than 5°C is called the E zone, and the range where the condensation temperature is 65°C or more is called the F zone. Controls corresponding to each of these zones are shown in the table below.
（以下余白）
表
この表かられかるように凝縮温度がＡゾーンにある場合
、制御器（１４）は圧縮機（２）の回転速度を変える周
波数を室内温度が設定値になるように〔室内温度を検出
する検知器や、室内温度を設定する回路等は図示せず〕
増減制御する。また、凝縮温度がＢゾーンにある場合、
制御器（１４）は前記室内温度が設定値になるように周
波数を減少させるか、あるいは維持する制御を行なう。(Leaving space below) Table As can be seen from this table, when the condensing temperature is in zone A, the controller (14) changes the frequency of changing the rotation speed of the compressor (2) so that the indoor temperature reaches the set value. Detectors for detecting temperature and circuits for setting indoor temperature are not shown]
Control increase/decrease. Also, if the condensing temperature is in the B zone,
A controller (14) performs control to reduce or maintain the frequency so that the indoor temperature reaches a set value.
更に、前記凝縮温度がＣゾーン、Ｄゾーン、Ｅゾーンに
ある場合、制御器（１４）は前記周波数をそれぞれ２Ｈ
ｚ。Furthermore, when the condensation temperature is in the C zone, D zone, and E zone, the controller (14) adjusts the frequency to 2H, respectively.
z.
５Ｈｚ、 １０Ｈｚ低下させ、凝縮温度がＦゾーンに
あるときは圧縮機（２）の運転を停止する。制御器（１
４〉のこのような周波数の制御は所定時間毎、例えば３
０秒毎に行なわれ、Ｆゾーンの制御だけは割込み制御さ
れるが凝縮温度が６５°Ｃ未満になると圧縮機（２）の
運転が再開される。しかし、前記周波数を低下させる制
御が行なわれた後、所定時間、例えば５分間は、凝縮温
度がＡゾーンにあって、かつ、周波数を増加させる制御
を行なう場合、この増加させる周波数を制御器（１４）
は２．５）１ｚと小さくし、また、５分間を経過した後
は６０Ｈｚとするものである。When the condensing temperature is in the F zone, the operation of the compressor (2) is stopped. Controller (1
4> such frequency control is performed every predetermined time, for example, 3
This is carried out every 0 seconds, and only the control of the F zone is controlled by interruption, but when the condensing temperature becomes less than 65°C, the operation of the compressor (2) is restarted. However, if the condensing temperature is in the A zone for a predetermined period of time, for example, 5 minutes after the control to lower the frequency is performed, and the frequency is to be increased, the frequency to be increased is controlled by the controller ( 14)
is set to 2.5) as low as 1 z, and after 5 minutes, it is set to 60 Hz.
このように構成された空気調和機では暖房運転時法に説
明するように動作する。空気調和機の運転開始直後は冷
媒の凝縮温度は低く、Ａゾーンにある。そして、制御器
（１４）は室内温度が設定値になるように周波数を制御
し、圧縮機（２）の回転速度が制御される。圧縮機の運
転が続けられると冷媒の凝縮温度が上昇し、この凝縮温
度がＢゾーンに達した場合、制御器（１４）は周波数を
維持するか、あるいは、低下させる制御を行なう。モし
て、このような周波数の制御が行なわれ、負荷の状態に
より凝縮温度が更に上昇し、例えば、Ｃあるいはり、Ｅ
ゾーンに達した場合、制御器（１４）はそれぞれ２Ｈｚ
、あるいは５Ｈｚ、１０Ｈｚ低下させる。この周波数の
制御が行なわれ、圧縮機（２）の回転速度が低下すると
、凝縮温度も低下する。そして、次の凝縮温度の読込時
にまだＣあるいはり、Ｅゾーンに凝縮温度がある場合、
再び制御器（１４）がそのゾーンにおける周波数を低下
させる制御を行なう。そして、凝縮温度がＡゾーンにま
そ低下し、設定温度と室内温度との関係で周波数を増加
させる場合、最初の周波数を低下させる制御が行なわれ
た後５分以内であれば制御器（１４）は増加させる周波
数を２ 、５ Ｈｚとし、５分を経過していれば増加さ
せる周波数を６０Ｈｚとする。The air conditioner configured in this manner operates as described in the heating operation method. Immediately after the air conditioner starts operating, the condensation temperature of the refrigerant is low and is in the A zone. Then, the controller (14) controls the frequency so that the indoor temperature reaches the set value, and the rotational speed of the compressor (2) is controlled. As the compressor continues to operate, the condensation temperature of the refrigerant increases, and when this condensation temperature reaches the B zone, the controller (14) maintains or decreases the frequency. Therefore, such frequency control is performed, and the condensing temperature further increases depending on the load condition, such as C, E, or E.
If the zone is reached, the controller (14) will each
, or lower it by 5Hz or 10Hz. When this frequency is controlled and the rotational speed of the compressor (2) decreases, the condensing temperature also decreases. Then, when reading the next condensing temperature, if it is still above C and the condensing temperature is in E zone,
Again, the controller (14) performs control to lower the frequency in that zone. If the condensing temperature is about to drop to zone A and the frequency is increased depending on the relationship between the set temperature and the indoor temperature, the controller (14) The frequency to be increased is set to 2.5 Hz, and if 5 minutes have passed, the frequency to be increased is set to 60 Hz.
このように、本発明の空気調和機によれば、冷媒の凝縮
温度がほぼ５６℃以下になるように凝縮温度が５６°Ｃ
よりずっと高い場合〔例えばＥゾーンの場合〕、周波数
が大幅に減少制御され、凝縮温度のそれほど高くない場
合〔例えばＣゾーンの場合〕、周波数がわずかに減少制
御されるので、この周波数の制御に伴ない圧縮機の回転
速度がよりきめ細かく減少制御され、冷媒の凝縮温度の
上昇、延いては冷媒圧力の上昇が抑えられ、圧縮機の破
損が極力防止できる。また、冷媒圧力の異常に高い時空
気調和機を停止させる安全装置が設けられている場合で
も、この安全装置を働らかせることなしに空気調和機の
運転が継続され運転停止による不快感を使用者に与える
ことが極力防止される。Thus, according to the air conditioner of the present invention, the condensation temperature is set to 56°C so that the condensation temperature of the refrigerant is approximately 56°C or less.
If the condensing temperature is much higher [e.g. in the E zone], the frequency is controlled down significantly, and if the condensing temperature is not so high [e.g. in the C zone], the frequency is controlled down slightly, so that the control of this frequency is The rotational speed of the accompanying compressor is controlled to decrease more precisely, and the rise in the condensing temperature of the refrigerant and, by extension, the rise in refrigerant pressure is suppressed, and damage to the compressor can be prevented as much as possible. In addition, even if a safety device is installed to stop the air conditioner when the refrigerant pressure is abnormally high, the air conditioner continues to operate without this safety device being activated, causing discomfort caused by the stoppage. giving to other persons is to be prevented as much as possible.
また、Ｃ，Ｄ、Ｅゾーンの制御が行なわれた後５分以内
は周波数を増加させる場合、この周波数が小さく抑えら
れるので、冷媒の凝縮温度が所定値、例えばＢゾーンの
上限である５６℃以上にできるだけならないように圧縮
機（２）の回転速度が抑えられる。このため、圧縮機（
２）における回転速度〔運転能力〕のハンチングが極力
抑えられる効果もある゛。Also, if the frequency is increased within 5 minutes after the control of C, D, and E zones is performed, this frequency is kept low, so that the condensation temperature of the refrigerant remains at a predetermined value, for example, 56°C, which is the upper limit of zone B. The rotational speed of the compressor (2) is suppressed so as not to increase as much as possible. For this reason, the compressor (
It also has the effect of suppressing hunting in the rotational speed (operating ability) in 2) as much as possible.
尚、この実施例では冷媒の凝縮温度に応じて減少させる
周波数を増減制御するように空気調和機を構成したが、
冷媒の凝縮温度と相関関係にある物理量の冷媒の蒸発温
度、あるいは冷媒の圧力に応じて前記減少させる周波数
を制御するように空気調和機を構成しても構わない。ま
た、複数台の室内機を備えた空気調和機に本発明を適用
しても構わない。In this example, the air conditioner was configured to increase or decrease the frequency to be reduced depending on the condensation temperature of the refrigerant.
The air conditioner may be configured to control the frequency to be reduced in accordance with the evaporation temperature of the refrigerant, which is a physical quantity that is correlated with the condensation temperature of the refrigerant, or the pressure of the refrigerant. Further, the present invention may be applied to an air conditioner equipped with a plurality of indoor units.
（ト）発明の詳細
な説明したように本発明による空気調和機では、冷媒の
凝縮温度、または蒸発温度、あるいは圧力に応じて制御
器が周波数を減少させる制御を行なうので、圧縮機の回
転速度がより細かく減少制御されて、冷媒の凝縮温度の
上昇、延いては冷媒の圧力の上昇が極力抑えられ、圧縮
機の破損が極力防止できる。また、冷媒の圧力の上昇が
極力抑えられるので、冷媒の異常に高い圧力を検出する
と運転を停止させる安全装置が設けられている場合でも
、この安全装置を働らかせることなく空気調和機の運転
が継続され、運転停止による不快感を使用者に極力与え
ないという効果もある。(g) As described in detail of the invention, in the air conditioner according to the present invention, the controller performs control to reduce the frequency depending on the condensation temperature, evaporation temperature, or pressure of the refrigerant, so that the rotation speed of the compressor is controlled. is controlled to decrease more precisely, the increase in the condensing temperature of the refrigerant, and hence the increase in the pressure of the refrigerant, is suppressed as much as possible, and damage to the compressor can be prevented as much as possible. In addition, since the increase in refrigerant pressure is suppressed as much as possible, even if a safety device is installed that stops operation when abnormally high refrigerant pressure is detected, the air conditioner can be operated without activating this safety device. This also has the effect of minimizing the user's discomfort due to the stoppage of operation.
第１図は本発明による空気調和機の概略構成説明図、第
２図は本発明による空気調和ユニットにおける制御器の
作動を示すフローチャー１・である。
（２）・・・圧縮機、 （７）・・・室外熱交換器、
（９）・・・室内熱交換器、 （１ｏ）・・・冷媒減圧
装置、 （１３）・・・検知器、 （１４）・・・制御
器。FIG. 1 is a schematic configuration explanatory diagram of an air conditioner according to the present invention, and FIG. 2 is a flowchart 1 showing the operation of the controller in the air conditioning unit according to the present invention. (2)...Compressor, (7)...Outdoor heat exchanger,
(9)... Indoor heat exchanger, (1o)... Refrigerant pressure reduction device, (13)... Detector, (14)... Controller.
Claims (2)
凝縮器と、減圧装置と、蒸発器と、前記凝縮器内での冷
媒の凝縮温度、または蒸発器内での冷媒の蒸発温度、あ
るいは冷媒の圧力を検出する検知器と、この検知器が設
定値以上の値を検出すると前記周波数を減少させる制御
器とを有する空気調和器において、前記制御器は前記検
知器の検出した値に応じて周波数の制御量を変えること
を特徴とする空気調和機。(1) A compressor whose rotational speed can be changed depending on the frequency,
a condenser, a pressure reducing device, an evaporator, a detector that detects the condensation temperature of the refrigerant in the condenser, the evaporation temperature of the refrigerant in the evaporator, or the pressure of the refrigerant; and a controller that reduces the frequency when a value greater than or equal to a value is detected, wherein the controller changes the amount of frequency control according to the value detected by the detector. .
定時間は増大させる周波数を小さくする特許請求の範囲
第１項記載の空気調和機。(2) The air conditioner according to claim 1, wherein the controller reduces the increased frequency for a predetermined time after controlling the frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1083115A JP2902665B2 (en) | 1989-03-31 | 1989-03-31 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1083115A JP2902665B2 (en) | 1989-03-31 | 1989-03-31 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02263054A true JPH02263054A (en) | 1990-10-25 |
| JP2902665B2 JP2902665B2 (en) | 1999-06-07 |
Family
ID=13793205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1083115A Expired - Fee Related JP2902665B2 (en) | 1989-03-31 | 1989-03-31 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2902665B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622936A (en) * | 2020-04-25 | 2020-09-04 | 壹格建筑科技(上海)有限公司 | Method, apparatus and computer readable storage medium for compressor overload protection |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101835339B1 (en) * | 2016-12-21 | 2018-03-07 | 엘지전자 주식회사 | Air conditioner and Method for controlling it |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60223963A (en) * | 1984-04-20 | 1985-11-08 | 三菱電機株式会社 | Refrigerator |
| JPS62294851A (en) * | 1986-05-20 | 1987-12-22 | 三洋電機株式会社 | Refrigerator |
-
1989
- 1989-03-31 JP JP1083115A patent/JP2902665B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60223963A (en) * | 1984-04-20 | 1985-11-08 | 三菱電機株式会社 | Refrigerator |
| JPS62294851A (en) * | 1986-05-20 | 1987-12-22 | 三洋電機株式会社 | Refrigerator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622936A (en) * | 2020-04-25 | 2020-09-04 | 壹格建筑科技(上海)有限公司 | Method, apparatus and computer readable storage medium for compressor overload protection |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2902665B2 (en) | 1999-06-07 |
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