JPH01210762A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH01210762A JPH01210762A JP63036367A JP3636788A JPH01210762A JP H01210762 A JPH01210762 A JP H01210762A JP 63036367 A JP63036367 A JP 63036367A JP 3636788 A JP3636788 A JP 3636788A JP H01210762 A JPH01210762 A JP H01210762A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- compressor
- pressure
- high pressure
- 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
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 52
- 239000012530 fluid Substances 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 17
- 238000004364 calculation method Methods 0.000 claims description 16
- 230000004044 response Effects 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 230000004913 activation Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 230000008569 process Effects 0.000 description 19
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、圧縮機の駆動周波数を変更して容量制御を行
う空気調和機の運転制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an operation control device for an air conditioner that controls capacity by changing the drive frequency of a compressor.
（従来の技術）
従来、空気調和機において冷媒の圧力を検知して圧縮機
の負荷を制御する場合、圧力センサを用いることは公知
である（実開昭５３−６９７６４号公報等参照）。(Prior Art) Conventionally, it has been known to use a pressure sensor when detecting the pressure of a refrigerant in an air conditioner to control the load on a compressor (see Japanese Utility Model Application Publication No. 53-69764, etc.).
また、圧縮機の安全装置として高圧圧力開閉器を設けて
、高圧圧力の異常上昇時に圧縮機の運転を停止させるこ
とは公知である（実開昭４８−４１０４１号公報等参照
）。Furthermore, it is known to provide a high-pressure switch as a safety device for a compressor to stop the operation of the compressor when the high-pressure pressure increases abnormally (see Japanese Utility Model Publication No. 48-41041, etc.).
（発明が解決しようとする課題）
しかし上記従来の技術では、高圧圧力に応じた圧縮機の
容量制御行うために高圧圧力センサを設けることが考え
られるが、圧力センサが高価なために、制御装置のコス
トが高くなる。(Problem to be Solved by the Invention) However, in the above conventional technology, it is possible to provide a high pressure sensor to control the capacity of the compressor according to the high pressure, but since the pressure sensor is expensive, the control device costs will increase.
また高圧圧力の異常上昇時に高圧圧力開閉器を作動させ
て圧縮機を停止させる場合、瞬時的な高圧圧力上昇によ
り高圧圧力開閉器が作動して圧縮機を停止させ、安定し
た運転を妨げる。In addition, when the high pressure switch is operated to stop the compressor when the high pressure increases abnormally, the high pressure switch is activated due to the instantaneous increase in high pressure, stopping the compressor and preventing stable operation.
（ｉ１題を解決するための手段）
上記課題を解決するために１本請求項第１の発明におい
ては、第１図に示すようにインバータ６ により駆動さ
れるインバータ式圧縮機１．熱源側熱交換器２、膨張機
構３および利用側熱交換器４を備えた空気調和機におい
て、利用側熱交換器４の被冷却流体温度Ｔｅを検出する
流体温度検出手段７と、熱源側熱交換器２の空気温度Ｔ
ａ１ｒを検出する外気温度検出手段８と、圧縮機１の駆
動周波数ＦＴを検出する周波数検出手段９と、流体温度
検出手段７．外気温度検出手段８および周波数検出手段
９の出力から高圧圧力ＨＰを演算する高圧圧力演算手段
ｌＯと、高圧圧力演算手段１０の出力と所定圧力領域と
を比較し、高圧圧力演算手段１０の出力が所定圧力領域
を越えているとき第１信号を、所定圧力領域内のとき第
２信号を、所定圧力領域に達していないとき第３信号を
それぞれ出力する比較手段１１と、比較手段１１からの
第１信号により圧縮機１の駆動周波数ＦＴを所定値減少
させる信号を出力する周波数減少手段１２と、比較手段
１１からの第２信号により圧縮機１の駆動周波数Ｆ丁を
維持させる信号を出力する周波数維持手段１３と、比較
手段１１からの第３信号により圧縮機１の駆動周波数Ｆ
Ｔを所定値増加させる信号を出力する周波数増加手段１
４と、圧縮機１の高圧側圧力が設定圧力値以上になると
接点を開く高圧圧力開閉器１５と、一定時間を設定する
タイマ手段１６と、高圧圧力開閉器１５の接点が開い′
ている間は、周波数維持手段３と周波数増加手段１４の
作動を停止するとともに、周波数減少手段１２をタイマ
手段１６により設定された一定時間ごとに作動させる周
波数減少手段１２の優先作動手段１７とを備えている。(Means for Solving Problem i1) In order to solve the above problem, in the invention of claim 1, an inverter type compressor 1. driven by an inverter 6 as shown in FIG. In an air conditioner equipped with a heat source side heat exchanger 2, an expansion mechanism 3, and a usage side heat exchanger 4, a fluid temperature detection means 7 for detecting the cooled fluid temperature Te of the usage side heat exchanger 4, and a heat source side heat exchanger 7 are provided. Air temperature T of exchanger 2
an outside air temperature detection means 8 for detecting a1r, a frequency detection means 9 for detecting the drive frequency FT of the compressor 1, and a fluid temperature detection means 7. The high pressure calculation means lO calculates the high pressure HP from the outputs of the outside air temperature detection means 8 and the frequency detection means 9, and the output of the high pressure calculation means 10 is compared with a predetermined pressure region, and the output of the high pressure calculation means 10 is determined. Comparing means 11 outputs a first signal when the pressure exceeds a predetermined pressure range, a second signal when the pressure falls within the predetermined pressure range, and a third signal when the predetermined pressure range is not reached; a frequency reduction means 12 that outputs a signal that reduces the drive frequency FT of the compressor 1 by a predetermined value by a first signal; and a frequency reduction means 12 that outputs a signal that maintains the drive frequency F of the compressor 1 by a second signal from the comparison means 11. The driving frequency F of the compressor 1 is determined by the third signal from the maintaining means 13 and the comparing means 11.
Frequency increasing means 1 that outputs a signal that increases T by a predetermined value
4, a high-pressure pressure switch 15 that opens a contact when the high-pressure side pressure of the compressor 1 exceeds a set pressure value, a timer means 16 that sets a certain period of time, and a contact of the high-pressure switch 15 that opens.
During this period, the operation of the frequency maintenance means 3 and the frequency increase means 14 is stopped, and the priority operation means 17 of the frequency reduction means 12 is activated, which operates the frequency reduction means 12 at regular intervals set by the timer means 16. We are prepared.
本請求項第２の発明においては第３図に示すように請求
項第１の発明の空気調和機の構成に加えて、流体温度目
標値Ｔｓを設定する流体温度設定手段１８と、流体温度
検出手段７および流体温度設定手段１８の各信号を受け
て流体温度Ｔｅと流体温度目標値Ｔｓとの温度差ΔＴに
より圧縮機１の駆動周波数ＦＴを減少、維持または増加
する周波数制御信号を出力する周波数制御信号発生手段
１９と、高圧圧力開閉器１５の接点が閉じている間は、
周波数減少手段１２１周波数維持手段１３、周波数増加
手段１４および周波数制御信号発生手段１９の出力を受
けて、圧縮機１の駆動周波数ＦＴを減少させる信号、維
持させる信号、増加させる信号の順に優先して出力する
選択手段２１とを備えている。さらに、優先作動手段１
７において高圧圧力開閉器１５の接点が開いている間は
周波数制御信号発生手段１９の作動も停止する。In the second aspect of the present invention, in addition to the configuration of the air conditioner of the first aspect of the invention, as shown in FIG. A frequency for outputting a frequency control signal for decreasing, maintaining, or increasing the driving frequency FT of the compressor 1 according to the temperature difference ΔT between the fluid temperature Te and the fluid temperature target value Ts upon receiving each signal from the means 7 and the fluid temperature setting means 18. While the contact between the control signal generating means 19 and the high pressure switch 15 is closed,
In response to the outputs of the frequency reduction means 121, the frequency maintenance means 13, the frequency increase means 14, and the frequency control signal generation means 19, priority is given to a signal for decreasing the drive frequency FT of the compressor 1, a signal for maintaining it, and a signal for increasing it. and a selection means 21 for outputting. Furthermore, priority actuation means 1
While the contact point of the high pressure switch 15 is open at 7, the operation of the frequency control signal generating means 19 is also stopped.
本請求項第３の発明においては第５図に示すように請求
項第２の発明の空気調和機の構成における被冷却流体温
度Ｔｏを検出する流体温度検出手段７に替えて圧縮機１
の吸入圧力ＬＰを検出する低圧圧力検出手段２０を、流
体温度目標値Ｔｓを設定する流体温度設定手段１８に替
えて低圧圧力目標［Ｌ Ｐ ｓを設定する低圧圧力設定
手段２２を備えている。In the third aspect of the present invention, as shown in FIG.
In place of the fluid temperature setting means 18 that sets the fluid temperature target value Ts, the low pressure detection means 20 that detects the suction pressure LP of the fluid temperature setting means 22 that sets the low pressure target [L P s is provided.
（作 用） 本発明は次のような作用をもたらす。(for production) The present invention provides the following effects.
すなわち、請求項第１の発明では設けられた流体温度検
出手段７、請求項第２の発明では流体温度制御に関連し
て設けられた流体温度検出手段７゜請求項第３の発明で
は低圧圧力制御に関連して設けられた低圧圧力検出手段
２０を用いて高圧圧力を演算するため、高圧圧力検出手
段を設けるのに比べてコストが安くできる。That is, in the first invention, the fluid temperature detection means 7 provided, in the second invention, the fluid temperature detection means 7 provided in connection with fluid temperature control, and in the third invention, the low pressure Since the high pressure is calculated using the low pressure detection means 20 provided in connection with the control, the cost can be reduced compared to providing the high pressure detection means.
また、高圧圧力の上昇時に、高圧圧力開閉器１５が作動
して圧縮機ｌの駆動周波数ＦＴを減少させることで、圧
縮機負荷を低減するため、瞬時的な高圧圧力上昇に対し
ても連続した運転を行える。In addition, when the high pressure increases, the high pressure switch 15 operates to reduce the drive frequency FT of the compressor l, thereby reducing the compressor load. Able to drive.
（実施例）
以下請求項第１の発明の一実施例を第１図および第２図
に基づいて説明する。尚、本実施例は、常時最高負荷で
運転される空気調和機、例えば蓄熱式空気調和機である
。(Embodiment) An embodiment of the invention according to claim 1 will be described below based on FIGS. 1 and 2. Note that this embodiment is an air conditioner that is always operated at maximum load, such as a regenerative air conditioner.
第１図において１は圧縮機、２は熱源側熱交換器、３は
膨張機構、４は利用側熱交換器であり、順次接続して冷
凍サイクルを構成しており、前記圧縮機１はインバータ
６により駆動されるインバータ式である。In FIG. 1, 1 is a compressor, 2 is a heat exchanger on the heat source side, 3 is an expansion mechanism, and 4 is a heat exchanger on the user side, which are connected in sequence to form a refrigeration cycle, and the compressor 1 is an inverter. It is an inverter type driven by 6.
また前記利用側熱交換器４には被冷却流体としての蓄熱
材の温度Ｔｅを検出する流体温度検出手段７．前記熱源
側熱交換器２の空気温度Ｔａ１ｒを検出する外気温度検
出手段８、前記圧縮機１には駆動周波数ＦＴを検出する
周波数検出手段９が設けられている。Further, the use-side heat exchanger 4 includes a fluid temperature detection means 7 for detecting the temperature Te of the heat storage material as the fluid to be cooled. The compressor 1 is provided with an outside temperature detection means 8 for detecting the air temperature Ta1r of the heat source side heat exchanger 2, and a frequency detection means 9 for detecting the drive frequency FT.
前記流体温度検出手段７と前記外気温度検出手段８と前
記周波数検出手段９との出力は高圧圧力演算手段１０に
取り込まれ、該高圧圧力演算手段１０は、被冷却流体温
度Ｔｅ、空気温度Ｔａ１ｒおよび駆動周波数ＦＴから高
圧圧力ＨＰを演算し、その結果を比較手段１１に出力す
る。The outputs of the fluid temperature detection means 7, the outside air temperature detection means 8, and the frequency detection means 9 are taken into the high pressure calculation means 10, and the high pressure calculation means 10 calculates the temperature Te of the fluid to be cooled, the temperature Ta1r of the air, and the temperature Ta1r of the cooled fluid. The high pressure HP is calculated from the drive frequency FT, and the result is output to the comparison means 11.
前記比較手段１１においては、前記高圧圧力演算手段Ｉ
Ｏの出力と予じめ設定されている所定圧力領域（２３ｋ
ｇ／ｆｌｆ≦ＨＰ≦２４ｋｇ／ｃｄ）とを比較してその
結界により１周波数減少手段１２１周波数維持手段１３
、周波数増加手段１４に作動信号を出力する。すなわち
、高圧圧力ＨＰが２４ｋｇ／ｄを越えているときは第１
信号を前記周波数減少手段１２に、 ２４ｋｇ／ｃｉ以
下２３ｋｇ／ａ１以上のときは第２信号を前記周波数維
持手段１３に、２３ｋｇ／ａｄ未満のときは第３信号を
前押周波数増加手段１１！にそれぞれ出力する。そして
前記周波数減少手段１２は第１信号に応動して、駆動周
波数ＦＴをＩＯＩＩＺＭ少し、前記周波数維持手段１３
は第２信号に応動して、駆動周波数ＦＴを維持し、前記
周波数増加手段１４は第３信号に応動して、駆動周波数
ＦＴをｌＯＨ２増加させる。In the comparison means 11, the high pressure calculation means I
O output and a preset predetermined pressure area (23k
g/flf≦HP≦24kg/cd), and the barrier reduces the frequency by 1 frequency by 121 by the frequency maintaining device 13.
, outputs an activation signal to the frequency increasing means 14. In other words, when the high pressure HP exceeds 24 kg/d, the first
A signal is sent to the frequency reducing means 12, a second signal is sent to the frequency maintaining means 13 when it is less than 24 kg/ci and more than 23 kg/a1, and a third signal is sent to the frequency increasing means 11 when it is less than 23 kg/ad. Output each. In response to the first signal, the frequency reducing means 12 reduces the driving frequency FT by a little IOIIZM, and the frequency maintaining means 13
maintains the driving frequency FT in response to the second signal, and the frequency increasing means 14 increases the driving frequency FT by lOH2 in response to the third signal.
一方、前記圧縮機１と前記熱源側熱交換器２との間には
高圧圧力開閉器１５が設けられてお一す、圧縮機１の高
圧側圧力が設定圧力値以上のときは、接点を開き、設定
圧力値未満のときは接点を閉じる。On the other hand, a high pressure switch 15 is provided between the compressor 1 and the heat source side heat exchanger 2, and when the high pressure side pressure of the compressor 1 is higher than the set pressure value, the contact is closed. Open, and close the contact when the pressure is less than the set pressure value.
１７は優先作動手段であり、前記高圧圧力開閉器１５の
開閉状態に応じて作動する。すなわち、高圧圧力開閉器
１５の接点が開いている間は、前記周波数維持手段１３
と周一波数増加手段１４の作動を停止するとと、もに１
周波数減少手段１２をタイマ手段１６により１．３分毎
に作動さ１せる。Reference numeral 17 denotes a priority activation means, which operates according to the open/closed state of the high pressure switch 15. That is, while the contacts of the high pressure switch 15 are open, the frequency maintaining means 13
and when the operation of the frequency increasing means 14 is stopped, both 1
The frequency reduction means 12 is operated by the timer means 16 every 1.3 minutes.
次に、第２図に基づいて各手段の作動態様を説明する。Next, the operating mode of each means will be explained based on FIG.
尚、５ｌ−３２３はステップ番号を示す。Note that 5l-323 indicates a step number.
第２図（イ）において、先ずＳｌにおいて、高圧圧力−
閉器１５の接点の開閉状態を検知して接点が閉じている
場合は、第２図（ロ）のＳｔｔに進み、接点が開いてい
る場合は過負荷状態にあると判定して、Ｓ２に移る。Ｓ
２においては、圧縮Ｉａ１の駆動周波数ＦＴが３０Ｈ２
以上であるが否かを判定し、３゜）ＩＺ未満であるＮＯ
の場合には室外機異常として、Ｓ３においてタイマ手段
１６のリセットをしたのち、Ｓ４において圧縮機１を停
止し、３０Ｈ２以上である’／ＥＳの場合にはＳ２にお
いて駆動周波数ＦＴをｌＯＨ２減少させたのち、Ｓ６に
おいてタイマ手段１６をセットしてタイマ時間３分の計
測を始めて８７に進む。Ｓ７においては、前記高圧圧力
開閉器１５の開閉状態を検知して、接点が開いている場
合は、Ｓ８においてタイマ時間３分の計測が完了したか
否かを判定し、完了していないＮＯの場合には、Ｓ７に
戻り、完了したＹＥＳの場合にはＳ９においてタイマ手
段】６のリセットをしたのちＳ２に戻る。一方。In Fig. 2 (a), first in Sl, high pressure -
If the open/closed state of the contact of the circuit breaker 15 is detected and the contact is closed, the process proceeds to Stt in Figure 2 (b), and if the contact is open, it is determined that there is an overload condition and the process proceeds to S2. Move. S
2, the drive frequency FT of compression Ia1 is 30H2
Determine whether it is above or not, and NO if it is less than 3゜IZ
In this case, the timer means 16 is reset in S3 as an abnormality in the outdoor unit, and then the compressor 1 is stopped in S4, and in the case of '/ES which is 30H2 or more, the driving frequency FT is decreased by lOH2 in S2. Thereafter, in S6, the timer means 16 is set to start counting the timer time of 3 minutes, and the process proceeds to 87. In S7, the open/closed state of the high-pressure pressure switch 15 is detected, and if the contact is open, it is determined in S8 whether or not the measurement of the timer time of 3 minutes has been completed, and if NO is not completed, it is determined. If so, the process returns to S7, and if YES, the timer means]6 is reset in S9, and then the process returns to S2. on the other hand.
Ｓ７において高圧圧力開閉器１５の接点が閉じている場
合は、ＳＩＯにおいてタイマ手段１６のリセットをした
のち、Ｂ以降の処理に進む。If the contact of the high-pressure switch 15 is closed in S7, the timer means 16 is reset in SIO, and then the process proceeds to B and subsequent steps.
第２図（ロ）において、Ｂ以降の処理は、先ずＳ１１に
おいてタイマ手段１６をセットしてタイマ時間３分の計
測を始めて８１２に進む。Ｓ１２においては高圧圧力開
閉器１５の接点の開閉状態を検知して。In FIG. 2(B), the process from B onward first sets the timer means 16 in S11 and starts counting the timer time of 3 minutes, and then proceeds to 812. In S12, the open/close state of the contacts of the high pressure switch 15 is detected.
接点が開いている場合は、過負荷状態にあると判定して
、Ｓ１３においてタイマ手段１６をリセットしたのち、
第２図（イ）の８２に移り、接点が閉じている場合は、
Ｓ１４において被冷却流体温度Ｔａを、Ｓ１５において
空気温度Ｔａ１ｒを、Ｓ１６において駆動周波数ＦＴを
それぞれ検出し、Ｓ１７において高圧圧力ＨＰを演算に
より求め、Ｓ１８に移る。Ｓ１８において該高圧圧力Ｈ
Ｐの値により信号を出力する。If the contact is open, it is determined that there is an overload condition, and after resetting the timer means 16 in S13,
Moving on to 82 in Figure 2 (a), if the contact is closed,
The cooled fluid temperature Ta is detected in S14, the air temperature Ta1r is detected in S15, and the drive frequency FT is detected in S16.The high pressure HP is calculated in S17, and the process moves to S18. In S18, the high pressure H
A signal is output depending on the value of P.
すなわち、 ２４ｋｇ／ｃｕｔを越えている場合は、Ｓ
１９において駆動周波数ＦＴをｌ０Ｈｚ減少させたのち
、Ｓ２０において、タイマ手段１６をリセットしてＳｌ
ｌに戻る。一方高圧圧力ＨＰが２４ｋｇ／ｃｒＩ以下、
２３ｋｇ／ｃｕｆ以上の場合はＳ１２に戻る。さらに、
２３ｋｇ／ｃｄ未満の場合は、Ｓ２１においてタイマ時
間３分が経過しているか否かを判定し、経過していない
ＮＯの場合にはＳ１２に戻り、経過したＹＥＳの場合に
はＳ２２において駆動周波数ＦＴを１０８２増加させた
のち、Ｓ２３においてタイマ手段１６をリセットしてＳ
１１に戻る。In other words, if it exceeds 24kg/cut, S
After decreasing the drive frequency FT by 10Hz in step 19, in step S20, the timer means 16 is reset and
Return to l. On the other hand, the high pressure HP is 24 kg/crI or less,
If the weight is 23 kg/cuf or more, the process returns to S12. moreover,
If it is less than 23 kg/cd, it is determined in S21 whether or not the timer time of 3 minutes has elapsed.If NO, the process returns to S12, and if YES, the drive frequency FT is determined in S22. After increasing 1082, the timer means 16 is reset in S23 and S
Return to 11.
次に請求項第２の発明の一実施例を第２図（イ）。Next, an embodiment of the invention according to claim 2 is shown in FIG. 2(a).
第３図および第４図に基づいて説明する。尚、本実施例
は請求項第１の発明の実施例に同様な部分については説
明を省く。This will be explained based on FIGS. 3 and 4. Incidentally, in this embodiment, descriptions of parts similar to the embodiment of the invention according to claim 1 will be omitted.
第３図に示すように、第１の発明の実施例の空気調和機
の構成に加えて、流体温度目標値Ｔｓを設定する流体温
度設定手段１８と、流体温度検出手段７および流体温度
設定手段１８の各出力を受けて被冷却流体温度Ｔｅと流
体温度目標値Ｔｓとの温度差△Ｔにより、圧縮機１の駆
動周波数ＦＴを減少、維持または増加する周波数制御信
号を出力する周波数制御信号発生手段１９を備えている
。さらに、２１は選択手段であり高圧圧力開閉器１５の
接点が閉じている間は、周波数減少手段１２、周波数維
持手段１３、周波数増加手段１４および周波数制御信号
発生手段１９の出力を受けて、受けた信号の優先順位を
判定して、圧縮機１の駆動周波数ＦＴを減少させる信号
、維持させる信号、増加させる信号の順に優先して出力
するものである。尚、請求項第１の発明の実施例におい
ては被冷却流体を蓄熱材としたが、請求項第２の発明の
実施例における被冷却流体は室内空気である。As shown in FIG. 3, in addition to the configuration of the air conditioner according to the first embodiment of the invention, a fluid temperature setting means 18 for setting a fluid temperature target value Ts, a fluid temperature detection means 7, and a fluid temperature setting means are provided. Frequency control signal generation that outputs a frequency control signal that decreases, maintains, or increases the drive frequency FT of the compressor 1 according to the temperature difference ΔT between the cooled fluid temperature Te and the fluid temperature target value Ts in response to each output of 18. Means 19 is provided. Further, reference numeral 21 denotes selection means, which receives the outputs of the frequency reduction means 12, the frequency maintenance means 13, the frequency increase means 14, and the frequency control signal generation means 19 while the contacts of the high-pressure pressure switch 15 are closed. The priority order of the signals is determined, and the signal for decreasing the drive frequency FT of the compressor 1, the signal for maintaining it, and the signal for increasing it are prioritized and output in that order. In the embodiment of the first aspect of the invention, the fluid to be cooled is a heat storage material, but in the embodiment of the second aspect of the invention, the fluid to be cooled is indoor air.
次に第２図（イ）および第４図に基づいて各手段の作動
態様を説明する。尚、第２図（イ）のフローチャートは
請求項第１の発明の作動態様と同様であるので引用して
説明を省く。ただし、図中のＢに替えてＣとする。Ｓ２
４〜Ｓ４２はステップ番号を示す。Next, the operation mode of each means will be explained based on FIG. 2(a) and FIG. 4. Incidentally, since the flowchart shown in FIG. 2(a) is similar to the operating mode of the invention according to claim 1, it will not be cited and explained. However, C is used instead of B in the figure. S2
4 to S42 indicate step numbers.
Ｃ以降の処理において、８２４〜Ｓ２６は第２図（ロ）
のＳ１４〜Ｓ１７と同様であり、Ｓ２５において高圧圧
力開閉器１５の接点が閉じている場合はＳ２７に進む。In the process after C, 824 to S26 are as shown in FIG.
The process is similar to S14 to S17, and if the contact of the high pressure switch 15 is closed in S25, the process advances to S27.
Ｓ２７において被冷却流体温度Ｔｅを検出し、８２８に
おいて流体温度目標値Ｔｓを検知し、Ｓ２９において温
度差ΔＴを算出し、Ｓ３０において温度差ΔＴから圧縮
機１の駆動周波数ＦＴを計算する。The cooled fluid temperature Te is detected in S27, the fluid temperature target value Ts is detected in 828, the temperature difference ΔT is calculated in S29, and the drive frequency FT of the compressor 1 is calculated from the temperature difference ΔT in S30.
Ｓ３１において、Ｓ３０において求めた値が駆動周波数
ＦＴを減少させるものであるが否かを判定し、駆動周波
数ＦＴが減少するＹＥＳの場合はＳ３７に進み、減少し
ないＮＯの場合はＳ３２に進む。３３２〜Ｓ３５におい
ての動作は、第２図（ロ）におけるＳ１４〜Ｓ１７に同
様である。Ｓ３６においてはＳ３５で求めた高圧圧力Ｈ
Ｐの値により信号を出力する。すなわち。In S31, it is determined whether or not the value obtained in S30 reduces the drive frequency FT. If YES, the drive frequency FT will decrease, the process proceeds to S37; if NO, the process proceeds to S32. The operations in steps 332 to S35 are similar to steps S14 to S17 in FIG. 2(b). In S36, the high pressure H obtained in S35
A signal is output depending on the value of P. Namely.
２４ｋｇ／ｃｎｆを越えている場合はＳ３７に進み、２
４ｋｇ／ｃｎｌ以下２３ｋｇ／ｃｄ以上の場合はＳ２５
に戻り、２３ｋｇ／ｃＪ未滴の場合はＳ３９に進む。Ｓ
３７においては駆動周波数ＦＴ＆１０Ｈ２減少させたの
ち、８３８においてタイマ手段１６をリセットしてＳ２
４に戻る。Ｓ３９においては、Ｓ３０において求めた値
が駆動周波数ＦＴを維持させるものであるか否かを判定
し、駆動周波数ＦＴを維持させるＹＥＳの場合Ｓ２５に
戻り、維持しないＮｏの場合はＳ４０に進む。Ｓ４０に
おいては、タイマ時間３分が経過しているか否かを判定
し、経過していないＮＯの場合はＳ２５に戻り、経過し
た’ＶＥＳの場合はＳ４１において駆動周波数ＦＴをｌ
ＯＨ２増加させたのち、Ｓ４２においてタイマ手段１６
をリセットして、Ｓ２４に戻る。If it exceeds 24kg/cnf, proceed to S37 and
S25 if 4kg/cnl or less 23kg/cd or more
Return to step S39 if 23 kg/cJ has not yet been dropped. S
At step 37, the drive frequency FT&10H2 is decreased, and at step 838, the timer means 16 is reset, and then at step S2
Return to 4. In S39, it is determined whether or not the value obtained in S30 allows the drive frequency FT to be maintained. If YES, the drive frequency FT is to be maintained, the process returns to S25; if NO, the process proceeds to S40. In S40, it is determined whether or not the timer time of 3 minutes has elapsed. If NO, the process returns to S25, and if 'VES has elapsed, the driving frequency FT is changed to l in S41.
After increasing OH2, the timer means 16 is activated in S42.
is reset and the process returns to S24.
次に、請求項第３の発明の一実施例を第２図（イ）、第
５図および第６図に基づいて説明する。Next, an embodiment of the third aspect of the invention will be described based on FIG. 2(A), FIG. 5, and FIG. 6.
尚、本実施例においては請求項第２の発明に同様な部分
については説明を省く。Incidentally, in this embodiment, descriptions of parts similar to those of the second aspect of the invention will be omitted.
第５図に示すように請求項第２の発明の実施例との相違
点は、複数台の室内丘ニットが設けられており、圧縮機
１の吸入圧力を一定に保ち、室内ユニットの運転制御は
各利用側熱交換器４，４に対応する膨張機構３．３にお
′いて流量制御し、圧縮機１の一入側には吸入圧力ＬＰ
を検出する低圧圧力検出手段２０が設けられていること
である。また低圧圧力目標値ＬＰｓを設定する低圧圧力
設定手段２２が設けられている。該低圧圧力検出手段２
０および該低圧圧力設定手段２２は第３図の流体温度検
出手段７および流体温度設定手段１８に替わるものであ
る。As shown in FIG. 5, the difference from the embodiment of the second invention is that a plurality of indoor hill knits are provided, and the suction pressure of the compressor 1 is kept constant, and the operation control of the indoor unit is controlled. is controlled by the expansion mechanism 3.3 corresponding to each user-side heat exchanger 4, 4, and the suction pressure LP is controlled at the input side of the compressor 1.
A low pressure detection means 20 is provided for detecting the pressure. Also provided is a low pressure setting means 22 for setting a low pressure target value LPs. The low pressure detection means 2
0 and the low pressure setting means 22 replace the fluid temperature detection means 7 and the fluid temperature setting means 18 shown in FIG.
次に第２図（イ）および第６図に基づいて作動態様を特
徴する請求項第３の発明の作動態様は請求項第２の発明
の作動態様にほぼ同様であり、相違点は被冷却流体温度
Ｔｅに替えて低圧圧力ＬＰを、流体温度目標値Ｔｓに替
えて低圧圧力目標値ＬＰｓを用いることである。Next, the operation mode of the third invention, which features the operation mode based on FIG. 2(a) and FIG. The low pressure LP is used instead of the fluid temperature Te, and the low pressure target value LPs is used instead of the fluid temperature target value Ts.
ただし、第２図（イ）中のＢに替えてＤとし、第６図中
の８４３〜Ｓ６１はステップ番号を示す。However, B in FIG. 2(a) is replaced with D, and 843 to S61 in FIG. 6 indicate step numbers.
尚１本発明の上記実施例では、熱源側熱交換器２に用い
る送風機の説明を省略したが、この送風機が回転数可変
型または運転台数可変型の場合には、この回転数または
運転台数を高圧圧力ＨＰを演算するための高圧圧力演算
手段ＩＯへの入力の１つとして加えても良い。1. In the above embodiment of the present invention, the explanation of the blower used in the heat source side heat exchanger 2 was omitted, but if this blower is of a variable rotation speed type or variable number of operating units, the rotation speed or number of operating units may be changed. It may be added as one of the inputs to the high pressure calculation means IO for calculating the high pressure HP.
（発明の効果）
本発明においては、流体温度検出手段７．外気温度検出
手段８１周波数検出手段９および高圧圧力演算手段ＩＯ
あるいは流体温度検出手段７に替えて低圧圧力検出手段
２０によって高圧圧力ＨＰを求め、さらに請求項第２の
発明においては室内温度制御に関連して設けられた流体
温度検出手段７゜請求項第３の発明においては低圧圧力
制御に関連して設けられた低圧圧力検出手段２０を用い
るために、高圧圧力検出手段を設けるのに較べてコスト
が安くできる。(Effects of the Invention) In the present invention, the fluid temperature detection means 7. Outside air temperature detection means 81 frequency detection means 9 and high pressure calculation means IO
Alternatively, the high pressure HP is determined by a low pressure detection means 20 instead of the fluid temperature detection means 7, and further, in the second aspect of the invention, the fluid temperature detection means 7 provided in connection with indoor temperature control. In the invention, since the low-pressure pressure detection means 20 provided in connection with the low-pressure pressure control is used, the cost can be reduced compared to providing a high-pressure pressure detection means.
また高圧圧力の上昇時に、高圧圧力開閉器１５の作動に
応動して圧縮機１の駆動周波数ＦＴを減少させることで
圧縮機負荷を低減するため、瞬時的な高圧圧力上昇に対
しては連続した運転を行える。In addition, when the high pressure increases, the drive frequency FT of the compressor 1 is reduced in response to the operation of the high pressure switch 15 to reduce the compressor load. Able to drive.
第１図および第２図は請求項第１の発明の空気調和機の
構成図および制御動作のフローチャート。
第３図および第４図は請求項第２の発明の空気調和機の
構成図および制御動作の１部のフローチャー１−１”第
５図および第６図は請求項第３の発明の空気調和機の構
成図および制御動作の１部のフローチャー１−で′ある
。
ｌ・・・圧縮機、２・・・熱源側熱交換器、３・・・膨
張機構、４・・・利用側熱交換器、６・・・インバータ
、７・・・流体温度検出手段、８・・・外気温度検出手
段、９・・・周波数検出手段、１０・・・高圧圧力演算
手段、１１・・・比較手段、１２・・・周波数減少手段
、１３・・・周波数維持手段、１４・・・周波数増加手
段、１５・・・高圧圧力開閉器、１６・・・タイマ手段
、１７・・・優先作動手段、１８・・・流体温度設定手
段、１９・・・周波数制御信号発生手段、２０・・・低
圧圧力検出手段、２１・・・選択手段、２２・・・低圧
圧力設定手段。
特許出願人 ダイキン工業株式会社
第１図
第３図
第２図 （イ）
第２図（ロ）
第４図
第６図1 and 2 are a block diagram and a flowchart of the control operation of an air conditioner according to the first aspect of the invention. 3 and 4 are a block diagram of the air conditioner according to the second invention and a flowchart 1-1 of a part of the control operation." This is a flowchart 1-' of a configuration diagram and a part of the control operation of the harmonizer. 1...Compressor, 2...Heat source side heat exchanger, 3...Expansion mechanism, 4...Using side Heat exchanger, 6... Inverter, 7... Fluid temperature detection means, 8... Outside temperature detection means, 9... Frequency detection means, 10... High pressure calculation means, 11... Comparison Means, 12... Frequency reduction means, 13... Frequency maintenance means, 14... Frequency increase means, 15... High pressure switch, 16... Timer means, 17... Priority activation means, 18...Fluid temperature setting means, 19...Frequency control signal generation means, 20...Low pressure detection means, 21...Selection means, 22...Low pressure setting means. Patent applicant Daikin Industries, Ltd. Company Figure 1 Figure 3 Figure 2 (A) Figure 2 (B) Figure 4 Figure 6
Claims (3)
圧縮機（１）、熱源側熱交換器（２）、膨張機構（３）
および利用側熱交換器（４）を備えた空気調和機におい
て、利用側熱交換器（４）の被冷却流体温度（Ｔｅ）を
検出する流体温度検出手段（７）と、熱源側熱交換器（
２）の空気温度（Ｔａｉｒ）を検出する外気温度検出手
段（８）と、圧縮機（１）の駆動周波数（ＦＴ）を検出
する周波数検出手段（９）と、流体温度検出手段（７）
、外気温度検出手段（８）および周波数検出手段（９）
の出力から高圧圧力（ＨＰ）を演算する高圧圧力演算手
段（１０）と、高圧圧力演算手段（１０）の出力と所定
圧力領域とを比較し、高圧圧力演算手段（１０）の出力
が所定圧力領域を越えているとき第１信号を、所定圧力
領域内のとき第２信号を、所定圧力領域に達していない
とき第３信号をそれぞれ出力する比較手段（１１）と、
比較手段（１１）からの第１信号により圧縮機（１）の
駆動周波数（ＦＴ）を所定値減少させる信号を出力する
周波数減少手段（１２）と、比較手段（１１）からの第
２信号により圧縮機（１）の駆動周波数（ＦＴ）を維持
させる信号を出力する周波数維持手段（１３）と、比較
手段（１１）からの第３信号により圧縮機（１）の駆動
周波数（ＦＴ）を所定値増加させる信号を出力する周波
数増加手段（１４）と、圧縮機（１）の高圧側圧力が設
定圧力値以上になると接点を開く高圧圧力開閉器（１５
）と、一定時間を設定するタイマ手段（１６）と、高圧
圧力開閉器（１５）の接点が開いている間は、周波数維
持手段（１３）と周波数増加手段（１４）の作動を停止
するとともに、周波数減少手段（１２）をタイマ手段（
１６）により設定された一定時間ごとに作動させる周波
数減少手段（１２）の優先作動手段（１７）とを備えた
ことを特徴とする空気調和機。(1) Inverter compressor (1) driven by inverter (6), heat source side heat exchanger (2), expansion mechanism (3)
and an air conditioner equipped with a user-side heat exchanger (4), a fluid temperature detection means (7) for detecting the cooled fluid temperature (Te) of the user-side heat exchanger (4), and a heat source-side heat exchanger. (
2) outside air temperature detection means (8) for detecting the air temperature (Tair), frequency detection means (9) for detecting the driving frequency (FT) of the compressor (1), and fluid temperature detection means (7).
, outside temperature detection means (8) and frequency detection means (9)
The output of the high pressure calculation means (10) is compared with a predetermined pressure region, and the output of the high pressure calculation means (10) is determined to be the predetermined pressure. Comparing means (11) that outputs a first signal when the pressure exceeds the pressure range, a second signal when the pressure falls within the predetermined pressure range, and a third signal when the predetermined pressure range is not reached;
Frequency reduction means (12) outputs a signal that reduces the driving frequency (FT) of the compressor (1) by a predetermined value in accordance with the first signal from the comparison means (11), and the second signal from the comparison means (11) The driving frequency (FT) of the compressor (1) is predetermined by a frequency maintaining means (13) that outputs a signal for maintaining the driving frequency (FT) of the compressor (1), and a third signal from the comparing means (11). frequency increasing means (14) that outputs a signal to increase the value; and a high pressure switch (15) that opens the contact when the high pressure side pressure of the compressor (1) exceeds the set pressure value.
), the timer means (16) for setting a certain period of time, and the high pressure switch (15), while the contacts of the high pressure switch (15) are open, the operation of the frequency maintaining means (13) and the frequency increasing means (14) is stopped. , the frequency reduction means (12) is replaced by the timer means (
16). An air conditioner characterized by comprising: preferential activation means (17) for the frequency reduction means (12), which is activated at regular intervals set by the method 16).
圧縮機（１）、熱源側熱交換器（２）、膨張機構（３）
および利用側熱交換器（４）を備え、かつ利用側熱交換
器（４）の被冷却流体温度（Ｔｅ）を検出する流体温度
検出手段（７）と、流体温度目標値（Ｔｓ）を設定する
流体温度設定手段（１８）と、流体温度検出手段（７）
および流体温度設定手段（１８）の各信号を受けて被冷
却流体温度（Ｔｅ）と流体温度目標値（Ｔｓ）との温度
差（ΔＴ）により、圧縮機（１）の駆動周波数（ＦＴ）
を減少、維持または増加させる周波数制御信号を出力す
る周波数制御信号発生手段（１９）とを備えた空気調和
機において、熱源側熱交換器（２）の空気温度（Ｔａｉ
ｒ）を検出する外気温度検出手段（８）と、圧縮機（１
）の駆動周波数（ＦＴ）を検出する周波数検出手段（９
）と、流体温度検出手段（７）、外気温度検出手段（８
）および周波数検出手段（９）の出力から高圧圧力（Ｈ
Ｐ）を演算する高圧圧力演算手段（１０）と、高圧圧力
演算手段（１０）の出力と所定圧力領域とを比較し、高
圧圧力演算手段（１０）の出力が所定圧力領域を越えて
いるとき第１信号を、所定圧力領域内のとき第２信号を
、所定圧力領域に達していないとき第３信号をそれぞれ
出力する比較手段（１１）と、比較手段（１１）からの
第１信号により圧縮機（１）の駆動周波数（ＦＴ）を所
定値減少させる信号を出力する周波数減少手段（１２）
と、比較手段（１１）からの第２信号により圧縮機（１
）の駆動周波数（ＦＴ）を維持させる信号を出力する周
波数維持手段（１３）と、比較手段（１１）からの第３
信号により圧縮機（１）の駆動周波数（ＦＴ）を所定値
増加させる信号を出力する周波数増加手段（１４）と、
圧縮機（１）の高圧側圧力が設定圧力値以上になると接
点を開く高圧圧力開閉器（１５）と、一定時間を設定す
るタイマ手段（１６）と、高圧圧力開閉器（１５）の接
点が開いている間は、周波数制御信号発生手段（１９）
、周波数維持手段（１３）および周波数増加手段（１４
）の作動を停止するとともに、周波数減少手段（１２）
をタイマ手段（１６）により設定された一定時間ごとに
作動させる周波数減少手段（１２）の優先作動手段（１
７）と、高圧圧力開閉器（１５）の接点が閉じている間
は、周波数減少手段（１２）、周波数維持手段（１３）
、周波数増加手段（１４）および周波数制御信号発生手
段（１９）の出力を受けて、圧縮機（１）の駆動周波数
（ＦＴ）を減少させる信号、維持させる信号、増加させ
る信号の順に優先して出力する選択手段（２１）とを備
えたことを特徴とする空気調和機。(2) Inverter compressor (1) driven by inverter (6), heat source side heat exchanger (2), expansion mechanism (3)
and a fluid temperature detection means (7) that includes a user-side heat exchanger (4) and detects the cooled fluid temperature (Te) of the user-side heat exchanger (4), and sets a fluid temperature target value (Ts). fluid temperature setting means (18) and fluid temperature detection means (7).
In response to each signal from the fluid temperature setting means (18), the drive frequency (FT) of the compressor (1) is determined by the temperature difference (ΔT) between the cooled fluid temperature (Te) and the fluid temperature target value (Ts).
In an air conditioner equipped with a frequency control signal generating means (19) that outputs a frequency control signal that decreases, maintains, or increases the air temperature (Tai) of the heat source side heat exchanger (2),
an outside air temperature detection means (8) for detecting the temperature r), and a compressor (1
) for detecting the driving frequency (FT) of the frequency detecting means (9
), fluid temperature detection means (7), and outside air temperature detection means (8).
) and the output of the frequency detection means (9).
The high pressure calculation means (10) that calculates P) compares the output of the high pressure calculation means (10) with a predetermined pressure range, and when the output of the high pressure pressure calculation means (10) exceeds the predetermined pressure range. The first signal is compressed by a comparison means (11) that outputs a second signal when the pressure is within a predetermined pressure region and a third signal when the predetermined pressure region has not been reached, and the first signal from the comparison means (11). frequency reduction means (12) that outputs a signal that reduces the drive frequency (FT) of the machine (1) by a predetermined value;
and the second signal from the comparison means (11) causes the compressor (1
) and a third frequency maintaining means (13) for outputting a signal for maintaining the driving frequency (FT) of the
frequency increasing means (14) for outputting a signal that increases the drive frequency (FT) of the compressor (1) by a predetermined value;
A high-pressure pressure switch (15) that opens a contact when the high-pressure side pressure of the compressor (1) exceeds a set pressure value, a timer means (16) for setting a certain period of time, and a contact of the high-pressure pressure switch (15). While open, the frequency control signal generating means (19)
, frequency maintaining means (13) and frequency increasing means (14)
) and at the same time stop the operation of the frequency reduction means (12).
The priority activation means (1) of the frequency reduction means (12) operates at fixed time intervals set by the timer means (16).
7), and while the contacts of the high pressure switch (15) are closed, the frequency reducing means (12) and the frequency maintaining means (13)
, in response to the outputs of the frequency increasing means (14) and the frequency control signal generating means (19), a signal is given priority in the order of decreasing, maintaining, and increasing the drive frequency (FT) of the compressor (1). An air conditioner characterized by comprising: a selection means (21) for outputting.
圧縮機（１）、熱源側熱交換器（２）、膨張機構（３）
および利用側熱交換器（４）を備え、かつ圧縮機（１）
の吸入圧力（ＬＰ）を検出する低圧圧力検出手段（２０
）と、低圧圧力目標値（ＬＰｓ）を設定する低圧圧力設
定手段（２２）と、低圧圧力検出手段（２０）および低
圧圧力設定手段（２２）の各信号を受けて吸入圧力（Ｌ
Ｐ）と低圧圧力目標値（ＬＰｓ）との圧力差（ΔＬＰ）
により圧縮機（１）の駆動周波数（ＦＴ）を減少、維持
または増加させる周波数制御信号を出力する周波数制御
信号発生手段（１９）とを備えた空気調和機において、
熱源側熱交換器（２）の空気温度（Ｔａｉｒ）を検出す
る外気温度検出手段（８）と、圧縮機（１）の駆動周波
数（ＦＴ）を検出する周波数検出手段（９）と、低圧圧
力検出手段（２０）、外気温度検出手段（８）および周
波数検出手段（９）の出力から高圧圧力（ＨＰ）を演算
する高圧圧力演算手段（１０）と、高圧圧力演算手段（
１０）の出力と所定圧力領域とを比較し、高圧圧力演算
手段（１０）の出力が所定圧力領域を越えているとき第
１信号を、所定圧力領域内のとき第２信号を、所定圧力
領域に達していないとき第３信号をそれぞれ出力する比
較手段（１１）と、比較手段（１１）からの第１信号に
より圧縮機（１）の駆動周波数（ＦＴ）を所定値減少さ
せる信号を出力する周波数減少手段（１２）と、比較手
段（１１）からの第２信号により圧縮機（１）の駆動周
波数（ＦＴ）を維持させる信号を出力する周波数維持手
段（１３）と、比較手段（１１）からの第３信号により
圧縮機（１）の駆動周波数（ＦＴ）を所定値増加させる
信号を出力する周波数増加手段（１４）と、圧縮機（１
）の高圧側圧力が設定圧力値以上になると接点を開く高
圧圧力開閉器（１５）と、一定時間を設定するタイマ手
段（１６）と、高圧圧力開閉器（１５）の接点が開いて
いる間は、周波数制御信号発生手段（１９）、周波数維
持手段（１３）および周波数増加手段（１４）の作動を
停止するとともに、周波数減少手段（１２）をタイマ手
段（１６）により設定された一定時間ごとに作動させる
周波数減少手段（１２）の優先作動手段（１７）と、高
圧圧力開閉器（１５）の接点が閉じている間は、周波数
減少手段（１２）、周波数維持手段（１３）、周波数増
加手段（１４）および周波数制御信号発生手段（１９）
の出力を受けて、圧縮機（１）の駆動周波数（ＦＴ）を
減少させる信号、維持させる信号、増加させる信号の順
に優先して出力する選択手段（２１）とを備えたことを
特徴とする空気調和機。(3) Inverter compressor (1) driven by inverter (6), heat source side heat exchanger (2), expansion mechanism (3)
and a user-side heat exchanger (4), and a compressor (1)
low pressure detection means (20
), a low pressure setting means (22) for setting a low pressure target value (LPs), a low pressure detection means (20), and a low pressure setting means (22).
Pressure difference (ΔLP) between P) and low pressure target value (LPs)
An air conditioner comprising: frequency control signal generating means (19) that outputs a frequency control signal that reduces, maintains or increases the drive frequency (FT) of the compressor (1),
An outside air temperature detection means (8) for detecting the air temperature (Tair) of the heat source side heat exchanger (2), a frequency detection means (9) for detecting the drive frequency (FT) of the compressor (1), and a low pressure A high pressure calculation means (10) that calculates high pressure (HP) from the outputs of the detection means (20), the outside temperature detection means (8), and the frequency detection means (9);
The output of 10) is compared with a predetermined pressure region, and when the output of the high pressure calculation means (10) exceeds the predetermined pressure region, the first signal is given, and when it is within the predetermined pressure region, the second signal is given as the predetermined pressure region. a comparison means (11) that outputs a third signal when the first signal has not reached the third signal, and a signal that reduces the drive frequency (FT) of the compressor (1) by a predetermined value based on the first signal from the comparison means (11). frequency reduction means (12); frequency maintenance means (13) for outputting a signal that maintains the drive frequency (FT) of the compressor (1) based on the second signal from the comparison means (11); and comparison means (11). frequency increasing means (14) for outputting a signal for increasing the driving frequency (FT) of the compressor (1) by a predetermined value in response to a third signal from the compressor (1);
), the high pressure switch (15) opens the contact when the high pressure side pressure of the high pressure switch (15) exceeds the set pressure value; stops the operation of the frequency control signal generating means (19), the frequency maintaining means (13) and the frequency increasing means (14), and the frequency decreasing means (12) is stopped at regular intervals set by the timer means (16). While the contacts of the priority activation means (17) of the frequency reduction means (12) and the high-pressure pressure switch (15) are closed, the frequency reduction means (12), the frequency maintenance means (13), and the frequency increase Means (14) and frequency control signal generating means (19)
The present invention is characterized by comprising a selection means (21) which receives the output of the compressor (1) and outputs a signal to decrease the drive frequency (FT) of the compressor (1), a signal to maintain it, and a signal to increase it in the order of priority. Air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63036367A JPH01210762A (en) | 1988-02-18 | 1988-02-18 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63036367A JPH01210762A (en) | 1988-02-18 | 1988-02-18 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01210762A true JPH01210762A (en) | 1989-08-24 |
| JPH0559338B2 JPH0559338B2 (en) | 1993-08-30 |
Family
ID=12467864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63036367A Granted JPH01210762A (en) | 1988-02-18 | 1988-02-18 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01210762A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013200063A (en) * | 2012-03-23 | 2013-10-03 | Denso Corp | Refrigeration cycle device |
-
1988
- 1988-02-18 JP JP63036367A patent/JPH01210762A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013200063A (en) * | 2012-03-23 | 2013-10-03 | Denso Corp | Refrigeration cycle device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0559338B2 (en) | 1993-08-30 |
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