JPH01237373A - Frequency control device of air conditioner - Google Patents
Frequency control device of air conditionerInfo
- Publication number
- JPH01237373A JPH01237373A JP63062751A JP6275188A JPH01237373A JP H01237373 A JPH01237373 A JP H01237373A JP 63062751 A JP63062751 A JP 63062751A JP 6275188 A JP6275188 A JP 6275188A JP H01237373 A JPH01237373 A JP H01237373A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- speed
- load
- compressor
- temperature
- 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
- 230000007423 decrease Effects 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 15
- 238000001816 cooling Methods 0.000 abstract description 10
- 230000001174 ascending effect Effects 0.000 abstract 4
- 230000000052 comparative effect Effects 0.000 abstract 2
- 230000007704 transition Effects 0.000 abstract 2
- 239000000843 powder Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は空気調和機の冷凍サイクルに介装されている圧
縮機の制御に使用される周波数制御装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a frequency control device used to control a compressor installed in a refrigeration cycle of an air conditioner.
従来の技術
周波数変換装置を搭載した空気調和機では、圧縮機のモ
ータに印加する電源の周波数を変更して圧縮機の能力が
制御されている。第９図は特開昭５６−３７４４１号に
記載されている周波数制御装置の動作の様子を示す。つ
まり、従来ではｔ１＝ｔ２で周波数の上昇速度と下降速
度が同じであった。In an air conditioner equipped with a conventional frequency conversion device, the capacity of the compressor is controlled by changing the frequency of the power supply applied to the compressor motor. FIG. 9 shows the operation of the frequency control device described in Japanese Patent Laid-Open No. 56-37441. In other words, conventionally, when t1=t2, the rate of increase and rate of frequency decrease were the same.
さらに従来では室外ユニットのファンモータの回転数は
、圧縮機の周波数の上昇時と下降時で同じである。Furthermore, conventionally, the rotation speed of the fan motor of the outdoor unit is the same when the frequency of the compressor increases and when the frequency decreases.
発明が解決しようとする課題
このような従来の構成では、暖房運転時の立ち上げ特性
および冷房運転時の立ち下げ特性を良くするために、周
波数の変化の速度を早く設定すると、立ち上げ、立ち下
げ特性は良くなるけれども、次のような問題がある。Problems to be Solved by the Invention In such a conventional configuration, if the speed of frequency change is set quickly in order to improve the startup characteristics during heating operation and the startup characteristics during cooling operation, Although the lowering characteristics are improved, there are the following problems.
室外ユニットの負荷が大きい時に、室内が設定温度に到
達して圧縮機の電源周波数が早い変化速度で下降したよ
うな場合には、周波数の下降速度が早いために負荷に対
して圧縮機を駆動するトルクが不足し、トルク不足のた
めに圧縮機が大きく振動して異常音が発生したり、冷凍
サイクルの接続配管の破損を招く。さらにトルクが不足
した場合には、圧縮機のモータの電流波形にひずみが生
じて周波数変換装置のパワートランジスタの保護装置が
作動するため、空気調和機の運転が停止状態になって快
適性が悪化する。When the load on the outdoor unit is heavy, if the indoor temperature reaches the set temperature and the compressor's power frequency drops at a fast rate of change, the compressor may not be driven to match the load because the rate of frequency drop is fast. Due to the insufficient torque, the compressor vibrates greatly, causing abnormal noise and causing damage to the connecting pipes of the refrigeration cycle. Furthermore, if the torque is insufficient, the current waveform of the compressor motor will be distorted and the protection device of the power transistor in the frequency converter will be activated, causing the air conditioner to stop operating and worsening comfort. do.
逆に周波数の変化速度を遅くした場合には、過負荷時に
おける圧縮機のトルク不足については問題が生じないが
、暖房運転時の立ち上げ、冷房運転時の立ち下げ特性が
悪化して、快適性が悪くなる。On the other hand, if the rate of change in frequency is slowed down, there will be no problem with insufficient compressor torque during overload, but the startup characteristics during heating operation and the shutdown characteristics during cooling operation will deteriorate, making it less comfortable. Sexuality becomes worse.
本発明は暖房運転時の立ち上げ特性、冷房運転時の立ち
下げ特性が良好で、しかも周波数下降時のトルク不足に
伴う問題を回避できる周波数制御装置を提供することを
目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a frequency control device that has good start-up characteristics during heating operation and good fall-down characteristics during cooling operation, and can avoid problems associated with insufficient torque when frequency decreases.
課題を解決するための手段
請求項１に記載の周波数制御装置は、冷凍サイクルに介
装された圧縮機に印加する電源周波数を、能力の上昇時
には次第に上昇させ、能力の低下時には次第に下降させ
る周波数変換装置を設けるとともに、圧縮機の負荷の大
きさを検出する負荷検出手段と、低負荷の検出時には周
波数上昇と下降速度を同一にして、高負荷の検出時には
下降速度を上昇速度よりも遅くするように前記周波数変
換装置に指示する変化速度変更手段とを設けたことを特
徴とする
請求項２に記載の周波数制御装置は、冷凍サイクルに介
装された圧縮機に印加する電源周波数を、能力の上昇時
には次第に上昇させ、能力の低下時には次第に下降させ
る周波数変換装置を設けるとともに、能力の低下時には
周波数の下降速度を上昇速度よりも遅くするように前記
周波数変換装置に指示する変化速度変更手段とを設けた
ことを特徴とする
請求項３に記載の周波数制御装置は、請求項１または請
求項２において、能力の低下時あるいは高負荷時の能力
の低下時にファンモータの回転数を、運転モードに応じ
て能力の上昇時とは切り換える送風機速度変更手段を設
けたことを特徴とする。Means for Solving the Problems The frequency control device according to claim 1 gradually increases the power frequency applied to the compressor installed in the refrigeration cycle when the capacity increases, and gradually decreases the frequency when the capacity decreases. In addition to providing a conversion device, a load detection means is provided to detect the magnitude of the load on the compressor, and when a low load is detected, the frequency rise and fall speed are made the same, and when a high load is detected, the fall speed is made slower than the rise speed. 3. The frequency control device according to claim 2, further comprising change rate changing means for instructing the frequency conversion device to a frequency converter that gradually increases the frequency when the frequency increases and gradually decreases the frequency when the capacity decreases, and a change rate changing means that instructs the frequency converter to make the frequency decrease rate slower than the increase rate when the capacity decreases; The frequency control device according to claim 3 is characterized in that in claim 1 or 2, the frequency control device changes the rotational speed of the fan motor to the operating mode when the capacity decreases or when the capacity decreases under high load. The present invention is characterized in that it is provided with a blower speed changing means that changes the blower speed according to the increase in capacity.
作用
請求項１に記載の構成によると、周波数変換装置は変化
速度変更手段によって負荷の大きさに応じて制御され、
圧縮機しこは、低負荷時しこ周波数上昇と下降速度が同
一の電源電圧が印加され、高負荷時の能力の低下時には
下降速度が上昇速度よりも遅い電源電圧が印加される。According to the structure set forth in claim 1, the frequency conversion device is controlled according to the magnitude of the load by the change rate changing means,
A power supply voltage is applied to the compressor in which the compressor frequency rises and falls at the same speed when the load is low, and a power supply voltage whose fall speed is slower than the rise speed is applied when the capacity decreases during a high load.
請求項２に記載の構成によると、圧縮機には、負荷の重
さにかかわらず能力の低下時の電源周波数の下降速度は
上昇速度よりも遅い電源電圧が印加される。According to the configuration described in claim 2, the power supply voltage is applied to the compressor, regardless of the weight of the load, the rate of decrease in the power supply frequency when the capacity decreases is slower than the rate of increase.
請求項３に記載の構成によると、電源周波数の下降速度
が上昇速度よりも遅く、しかもこの能力の低下時のファ
ンモータは回転速度か運転モートに応じて能力の上昇時
よりも早くまたは低下するように切り換えられる。According to the configuration described in claim 3, the rate of decrease in the power supply frequency is slower than the rate of increase in the power supply frequency, and the fan motor when the capacity decreases is faster or lower than when the capacity increases depending on the rotational speed or the operating motor. It can be switched as follows.
実施例
以下、本発明の実施例を第１図〜第８図に基づいて説明
する。Embodiments Hereinafter, embodiments of the present invention will be described based on FIGS. 1 to 8.
第１図は請求項１に記載の周波数制御装置を搭載した空
気調和機の構成を示し、区間Ａが室内ユニット、区間Ｂ
が室外ユニットを表わしている。FIG. 1 shows the configuration of an air conditioner equipped with the frequency control device according to claim 1, in which section A is an indoor unit and section B is an indoor unit.
represents the outdoor unit.
商用電源は、ヒユーズ、ノイズフィルタやダイオードブ
リッジ等を含む電源袋ｗ１を介して給電されており、室
外ユニットの能力制御型の圧縮機２には、第１の制御部
３とこれによってスイッチング制御されるパワートラン
ジスタ装置４を介して周波数変換した電圧が印加されて
いる。室内ユニットには室内ファンモータの制御ならび
に第１の制御部３と協同して圧縮機２を制御する第２の
制御部５が設けられている。第１の制御部３には室外の
気温を検出する第１の温度検出部６が接続され、第２の
制御部５には室内の温度を検出する第２の温度検出部７
が接続されている。Commercial power is supplied through a power supply bag w1 that includes a fuse, a noise filter, a diode bridge, etc., and the capacity control type compressor 2 of the outdoor unit is connected to a first control section 3, which performs switching control. A frequency-converted voltage is applied via a power transistor device 4. The indoor unit is provided with a second control section 5 that controls the indoor fan motor and controls the compressor 2 in cooperation with the first control section 3 . A first temperature detection section 6 that detects the outdoor temperature is connected to the first control section 3, and a second temperature detection section 7 that detects the indoor temperature is connected to the second control section 5.
is connected.
第２図は第１、第２の制御部３，５の前記圧縮機２の周
波数制御に係わる部分の機能図を示し、第３図はそのフ
ロチャートを示す。なお、ここでは周波数変換装置１０
は第３図に（ａ−８） ［ａ −９］のステップで表
わされている。設定温度記憶手段８には、空調しようと
する部屋の目標温度としての設定室温Ｔｏと、冷房運転
モードにおける負荷状態の判定に使用する基準値として
の室外負荷気温Ｔｏ’ならびに暖房運転モードにおける
室外負荷気温ＴＯ″とがあらかじめ設定されており、比
較判定手段９は第３図に示すフローチャートの（ａ−１
）で設定温度記憶手段８からＴｏ、 Ｔｏ’およびＴｏ
Ｉ＋の読み込みを行う。比較判定手段９は（ａ−２）
（ａ ３］でそれぞれ第１、第２の温度検出部６，
７からＴ１． Ｔ２の読み込みを実行し、［ａ−１］〜
（ａ−３）での読み込み値に基づいて空気調和機の状態
を判定し、周波数制御装置１０に周波数変化の方向が指
示され、変化速度変更手段１１を介して周波数変化の速
度が指示される。FIG. 2 shows a functional diagram of the portions of the first and second control sections 3 and 5 related to frequency control of the compressor 2, and FIG. 3 shows a flowchart thereof. Note that here, the frequency conversion device 10
is represented by steps (a-8) and [a-9] in FIG. The set temperature storage means 8 stores the set room temperature To as the target temperature of the room to be air-conditioned, the outdoor load temperature To' as a reference value used for determining the load state in the cooling operation mode, and the outdoor load in the heating operation mode. The temperature TO'' is set in advance, and the comparison/judgment means 9 performs (a-1) of the flowchart shown in FIG.
) from the set temperature storage means 8 to To, To' and To
Read I+. The comparison/judgment means 9 is (a-2)
(a3), the first and second temperature detection parts 6,
7 to T1. Execute reading of T2, [a-1] ~
The state of the air conditioner is determined based on the read value in (a-3), the direction of frequency change is instructed to the frequency control device 10, and the speed of frequency change is instructed via the change speed changing means 11. .
その様子を順に説明する。（ａ−３）に次いで運転モー
ドを判断しくａ−４） ＋室外負荷気温Ｔｏ’またはＴ
Ｏ”と、室外気温Ｔ２を比較して負荷状態を判定する。The situation will be explained step by step. After (a-3), determine the operation mode a-4) +Outdoor load temperature To' or T
The load condition is determined by comparing the temperature T2 with the outdoor temperature T2.
たとえば、暖房運転モード時の場合は［ａ−５］で高負
荷か低負荷であるかを判定し、Ｔ２≧ＴＯ″が成立して
高負荷の場合には、室内設定温度ＴＯと室内温度Ｔ工を
比較しくａ−６：１、Ｔｏ≦Ｔ□の時には能力の低下時
であるとして、周波数下降速度を■２に設定し周波数を
下降させる出力を出しくａ−７）、周波数を変更し［ａ
−８〕、パワートランジスタ装置４により圧縮機２を
駆動する（ ａ −９）。For example, in the case of heating operation mode, it is determined whether the load is high or low in [a-5], and if T2≧TO'' is established and the load is high, the indoor set temperature TO and the indoor temperature T Comparing the process a-6:1, when To≦T□, the capacity is decreasing, so set the frequency lowering speed to ■2 and output the output to lower the frequency.a-7), change the frequency. [a
-8], the compressor 2 is driven by the power transistor device 4 (a-9).
（ａ −６）においてＴ ｏ ＞ Ｔ工の時には能力の
上昇時であるとして、周波数上昇速度をｖｏに設定し周
波数を上昇させる出力を出しくａ−１０１，周波数を変
更しくａ−８） 、パワートランジスタ装置４により圧
縮機２を駆動する（ａ−９）。In (a-6), when T o > T, it is assumed that the capacity is increasing, so set the frequency increase speed to vo and output an output that increases the frequency a-101, change the frequency a-8), The compressor 2 is driven by the power transistor device 4 (a-9).
（ａ−５）において７２ ＜ Ｔ ｏ”の時には低負荷
であるとし、次に室内設定温度Ｔｏと室内温度Ｔ。In (a-5), when 72 < T o'', it is assumed that the load is low, and then the indoor set temperature To and the indoor temperature T.
を比較しくａ −１１） 、 Ｔｏ≦Ｔ□の時には周波
数下降速度を■３に設定し周波数を下降させる出力を出
し［ａ−１２］、周波数を変更しくａ−８）、パワート
ランジスタ装置４により圧縮機２を駆動する。またＴｏ
＞Ｔ□の時には周波数上昇速度を■３に設定し周波数を
上昇させる出力を出しくａ −１３）、周波数を変更し
くａ−８）、パワートランジスタ装置４により圧縮機２
を駆動する（ａ−９）。Compare a-11), when To≦T□, set the frequency lowering speed to ■3 and output the output to lower the frequency [a-12], change the frequency a-8), and use the power transistor device 4. Drive compressor 2. Also To
>T□, set the frequency increase speed to ■3 and output the output to increase the frequency a-13), change the frequency a-8), and the power transistor device 4 causes the compressor 2 to
(a-9).
第４図は同制御装置の暖房運転モードにおける上記の周
波数変化速度の特性を示している。〔ａ−５〕において
低負荷であると判定された場合は、化している。［ａ−
５］において高負荷であると一８＝
判定された場合には、周波数Ｏからｆ工までの上Ｊ工二
隻
昇速度１ １＝Ｖ□とｆよから０までの下し３
０−ｆ工
降速度＋ １＝ Ｖ ２が異なっており、■、
〉ｖ２である。またこの例では■、〉■３〉ｖ２である
。FIG. 4 shows the characteristics of the frequency change rate described above in the heating operation mode of the control device. If it is determined that the load is low in [a-5], then the load is low. [a-
If it is determined that the load is high in The lowering speed + 1 = V 2 is different, ■,
>v2. In this example, ■,〉■3〉v2.
暖房運転モードを例に挙げて第３図のフローチャートを
説明したが冷房運転モードについても（ａ−１４）以降
が同様に実行される。Although the flowchart in FIG. 3 has been explained using the heating operation mode as an example, steps (a-14) and subsequent steps are similarly executed in the cooling operation mode.
以上のように本実施例によれば、負荷検出手段としての
第１の温度検出部６で室外気温Ｔ２を負荷として検出し
、低負荷時は周波数の上昇速度と下降速度を同一とし高
速にしておくことで冷房運転モードの立ち下げ特性、暖
房運転モードの立ち上げ特性が良く、室温変化に対する
対応速度が早く快適性が高い。高負荷時は、周波数の上
昇速度を速く行うことにより、冷房運転モードの立ち下
′がり特性、暖房運転モードの立ち上げ特性が良くなる
。周波数の下降速度を遅らせることにより負荷に対する
圧縮機２のトルク不足も改善され、モータ電流の波形ひ
ずみが改善されるため保護装置の動作がなく、連続して
圧縮機２を運転できるため、快適性が向上する。トルク
不足によって圧縮機２が大きく振動することもなく、異
常音の発生などを抑さえることができる。As described above, according to this embodiment, the first temperature detecting section 6 serving as a load detecting means detects the outdoor temperature T2 as a load, and when the load is low, the rising speed and the falling speed of the frequency are the same and the frequency is set at a high speed. By doing so, the start-up characteristics of the cooling operation mode and the start-up characteristics of the heating operation mode are good, and the response speed to room temperature changes is quick and comfort is high. When the load is high, by increasing the rate of frequency increase, the fall characteristics of the cooling operation mode and the start-up characteristics of the heating operation mode are improved. By slowing down the rate of frequency decline, the lack of torque in the compressor 2 relative to the load is improved, and waveform distortion of the motor current is improved, so there is no need to operate the protective device and the compressor 2 can be operated continuously, improving comfort. will improve. The compressor 2 does not vibrate greatly due to insufficient torque, and the occurrence of abnormal noise can be suppressed.
上記実施例では負荷検出手段として室外気温を検出する
第１の温度検出部６を設けたが、これは冷媒圧力、圧縮
機の運転電流、室内熱交換器の温度、室外熱交換器の温
度などを検出し、これを各基準値と比較して負荷の大き
さを判別しても同様である。In the above embodiment, the first temperature detection section 6 is provided as a load detection means for detecting the outdoor air temperature, but this detects the refrigerant pressure, the operating current of the compressor, the temperature of the indoor heat exchanger, the temperature of the outdoor heat exchanger, etc. The same thing can be done by detecting the load and comparing it with each reference value to determine the magnitude of the load.
第５図〜第８図は請求項３に記載の周波数制御装置の一
実施例を示す。なお、第１図〜第４図と同様の作用をな
すものには同一の符号を付けて説明する。5 to 8 show an embodiment of the frequency control device according to claim 3. Components having the same functions as those in FIGS. 1 to 4 will be described with the same reference numerals.
第５図の空気調和機において、第１、第２の制御部３，
５の前記圧縮機２の周波数制御に係わる部分は第６図に
示す機能図のように構成されており、これは第７図に示
すフローチャートのよう手順に従って動作する。なお、
ここでは送風機速度変更手段が、比較判定手段９とリレ
ー１３とで構成されている。In the air conditioner shown in FIG. 5, the first and second control sections 3,
The part 5 related to frequency control of the compressor 2 is configured as shown in the functional diagram shown in FIG. 6, and operates according to the procedure shown in the flowchart shown in FIG. In addition,
Here, the blower speed changing means is comprised of a comparison determination means 9 and a relay 13.
設定温度記憶手段８には、空調しようとする部屋の目標
温度としての設定室温Ｔｏがあらかじめ設定されており
、比較判定手段９は第７図に示すフローチャートの［ｂ
−１，１で設定温度記憶手段８からＴｏの読み込みを行
う。比較判定手段９は［ｂ−２］で第２の温度検出部７
からＴ１の読み込みを実行し、［ｂ−１１Ｃｂ−２〕で
の読み込み値に基づいて空気調和機の状態を判定し、周
波数制御装置１０に周波数変化の方向が指示され、変化
速度変更手段１１を介して周波数変化の速度が指示され
る。さらに、比較判定手段９は判定した空気調和機の状
態に応じてリレー１２を切り換えて、１’）ユニットの
ファンモータ１３の回転数を指定する。The set temperature storage means 8 is preset with a set room temperature To as the target temperature of the room to be air-conditioned, and the comparison judgment means 9 is set in the [b] of the flowchart shown in FIG.
-1, 1 reads To from the set temperature storage means 8. The comparison/judgment means 9 is [b-2] and the second temperature detection section 7
T1 is read from [b-11Cb-2], the state of the air conditioner is determined based on the read value from [b-11Cb-2], the direction of frequency change is instructed to the frequency control device 10, and the change speed changing means 11 is instructed. via which the rate of frequency change is indicated. Furthermore, the comparison/determination means 9 switches the relay 12 according to the determined state of the air conditioner, and specifies the rotation speed of the fan motor 13 of the 1') unit.
その様子を順に説明する。（ｂ−２）に次いで運転モー
ドを判断しくｂ−３）、設定温度ＴＯと室温Ｔ工を比較
して、圧縮機２の能力の上昇時で＝ １１−
あるか低下時であるかを判定する。たとえば、暖房運転
モード時の場合は（ｂ−４）で圧縮機２の能力を上昇さ
せる状態か下降させる状態がの別を判定し、Ｔｏ）Ｔ１
のときには能力を上昇させる状態であるとして（ｂ−５
）でリレー１２をファンモータ１３の高速側に切り換え
、次に周波数上昇速度をＶ工に設定し周波数を上昇させ
る出方を出し［ａ−６３、周波数を変更し［ｂ−７］
、パワートランジスタ装置４により圧縮機２を駆動する
（ｂ−８］。The situation will be explained step by step. After (b-2), determine the operation mode (b-3), compare the set temperature TO and room temperature T, and determine whether the capacity of compressor 2 is increasing = 11- or decreasing. do. For example, in the heating operation mode, it is determined in (b-4) whether the capacity of the compressor 2 is being increased or decreased, and To) T1
When , it is assumed that the ability is increased (b-5
) to switch the relay 12 to the high-speed side of the fan motor 13, then set the frequency increase speed to V and find out how to increase the frequency [a-63, change the frequency [b-7]
, the compressor 2 is driven by the power transistor device 4 (b-8).
（ｂ−４）においてＴｏ≦Ｔ工が成立したときには能力
を下降させる状態であるとして（ｂ−９）でリレー１２
をファンモータ１３の低速側に切り換え、周波数下降速
度を■２に設定し周波数を下降させる出力を出しくｂ−
１０）、周波数を変更しくｂ−７〕、パワートランジス
タ装置４により圧縮機２を駆動する（ｂ−８］。When To≦T holds true in (b-4), it is assumed that the capacity is being lowered, and in (b-9) the relay 12
Switch the fan motor 13 to the low speed side, set the frequency lowering speed to ■2, and output an output to lower the frequency b-
10), change the frequency b-7] and drive the compressor 2 by the power transistor device 4 (b-8).
第８図（ａ）は同制御装置の暖房運転モードにおける上
記の周波数変化速度の特性について示しており、周波数
Ｏからｆｌまでの上昇速度る。しかも周波数下降時には
室外ユニットのファンモータ１３の回転数が高速側から
低速側に切り換っている。FIG. 8(a) shows the characteristics of the frequency change rate described above in the heating operation mode of the control device, and shows the rate of increase from frequency O to fl. Moreover, when the frequency decreases, the rotation speed of the fan motor 13 of the outdoor unit is switched from the high speed side to the low speed side.
暖房運転モードを例に挙げて第７図のフローチャートを
説明したが、冷房運転モードについても［ｂ−１１］以
降が同様に実行されて、圧縮機２へ印加される電源周波
数の変化速度ならびに室外ユニットのファンモータ１３
の回転数が第８図（ｂ’）に示すように切り換えられる
。Although the flowchart in FIG. 7 has been explained using the heating operation mode as an example, steps [b-11] and subsequent steps are similarly executed for the cooling operation mode, and the change rate of the power frequency applied to the compressor 2 and the outdoor Unit fan motor 13
The rotational speed is changed as shown in FIG. 8(b').
以上のように本実施例によると、周波数下降時には上昇
時よりも遅い■２に切り換えているため、負荷に対する
圧縮機２のトルク不足が改善される。As described above, according to the present embodiment, when the frequency is decreasing, the switching is made to (2) which is slower than when increasing the frequency, so that the insufficient torque of the compressor 2 with respect to the load is improved.
さらに、室外ユニットのファンモータ１３の速度を、た
とえば暖房運転モード時の周波数下降時には低速側にし
ているため、周波数上昇時と同じ高速でファンモータ１
３を回転させた場合に比べて冷媒の圧力が低下して圧縮
機２の必要トルクが減少し、負荷に対する圧縮機２のト
ルク不足がより短時間に改善される。Furthermore, since the speed of the fan motor 13 of the outdoor unit is set to a low speed side when the frequency decreases in the heating operation mode, for example, the fan motor 13 operates at the same high speed as when the frequency increases.
3 is rotated, the pressure of the refrigerant is lowered, the required torque of the compressor 2 is reduced, and the insufficient torque of the compressor 2 relative to the load is corrected in a shorter time.
上記実施例では室外ユニットのファンモータ１３の回転
数を制御したが、室内ユニットのファンモータ１４の回
転数を制御することによっても同様の効果が得られる。In the above embodiment, the rotation speed of the fan motor 13 of the outdoor unit is controlled, but the same effect can be obtained by controlling the rotation speed of the fan motor 14 of the indoor unit.
上記の請求項３の実施例では高負荷と低負荷にかかわら
ず周波数の下降速度を上昇速度よりも遅しで、これとと
もにファンモータの回転数を運転モードに応じて切り換
えたが、これは請求項２に記載のように高負荷と低負荷
にかかわらず周波数の下降速度を上昇速度よりも遅くす
るだけであっても、従来のように上昇速度と下降速度が
同一のものに比べて、快適性の向上を期待できる。In the above embodiment of claim 3, the rate of decrease in frequency is slower than the rate of increase in frequency regardless of whether the load is high or low, and at the same time, the rotation speed of the fan motor is changed according to the operation mode. As described in 2, even if the rate of frequency decline is slower than the rate of increase regardless of whether the load is high or low, comfort will be improved compared to the conventional case where the rate of increase and decrease is the same. can be expected to improve.
上記の請求項３の実験例によると、高負荷と低負荷にか
かわらず周波数の下降速度を上昇速度よりも遅くして、
これとともにファンモータの回転数を運転モードに応じ
て切り換えたが、請求項１に記載のように高負荷の場合
に限って周波数の下降速度を上昇速度よりも遅くするも
のにおいて、この高負荷時で周波数下降時にファンモー
タを運転モードに応じて切り換えることによって一層の
性能向上を期待できる。According to the experimental example of claim 3 above, the rate of decrease in frequency is made slower than the rate of increase in frequency regardless of whether the load is high or low.
At the same time, the number of revolutions of the fan motor is switched according to the operating mode, and in the case of a high load, as described in claim 1, in which the rate of decrease in frequency is made slower than the rate of increase in frequency, only in the case of high load. Further performance improvement can be expected by switching the fan motor according to the operating mode when the frequency drops.
発明の効果
以上のように本発明の各請求項の構成によると、変化速
度変更手段によって、圧縮機の電源周波数の変化速度を
下降時は上昇時より遅くしたため、冷房運転モード時の
立ち下がり、暖房運転モード時の立ち上がり特性が良く
、かつ周波数下降時のトルク不足にともなう圧縮機のモ
ータ電流の波形ひずみ、ならびに圧縮機の異常振動が低
減され、快適性が向上するとともに騒音の低減および配
管振動が低減される。Effects of the Invention As described above, according to the configurations of the claims of the present invention, the rate of change of the power supply frequency of the compressor is made slower when falling than when rising by the changing rate changing means, so that the falling rate in the cooling operation mode, It has good start-up characteristics in heating operation mode, and reduces waveform distortion of the compressor motor current due to insufficient torque when the frequency decreases, as well as abnormal vibrations of the compressor, improving comfort and reducing noise and piping vibration. is reduced.
請求項３の構成によると、周波数の下降速度を遅くする
とともに、ファンモータの回転数をも合わせて切り換え
ているため、トルク不足をより短時間で解消することが
でき、より一層の性能向上を期待できる。According to the configuration of claim 3, since the rate of decrease in frequency is slowed down and the rotational speed of the fan motor is also changed at the same time, the torque shortage can be resolved in a shorter time, and further performance improvement can be achieved. You can expect it.
第１図は本発明の請求項１に係る周波数制御袋置を搭載
した空気調和機の構成図、第２図は第１図の要部の機能
図、第３図は第２図の動作順序を示すフローチャート図
、第４図は同装置の要部波形図、第５図は本発明の請求
項３に係る周波数制御装置を搭載した空気調和機の構成
図、第６図は第５図の要部の機能図、第７図は第６図の
動作順序を示すフローチャート図、第８図は同装置の要
部波形図、第９図は従来の周波数制御装置の波形図であ
る。
２・・圧縮機、３，５・・・第１、第２の制御部、６゜
７・・・第１、第２の温度検出部、９・・比較判定手段
、ｌＯ・・・周波数変換装置、１１・・・変化速度変更
手段、１２・ ファンモータの回転数切換用リレー、１
３・室外ユニットのファンモータ、１４・室内ユニット
のファンモータ、■、・・・周波数の上昇速度、■２・
・・周波数の下降速度。
代理人 森 本 義 弘
第３図
（ぐ−ｔ）
級友皇患Ｔ＝１釦負指Ｌ′℃
Ｃ？−２１
亨Ａｋ弓側秒込と 丁１
（−〜３）
寥々り気、要語 、吉壺と５）ｘ）＋’Ｔ’）第４図
ｔ＋：も２ １３〜ｔ４’４ノー
穴９
一
箋
ωFig. 1 is a block diagram of an air conditioner equipped with a frequency-controlled bag holder according to claim 1 of the present invention, Fig. 2 is a functional diagram of the main parts of Fig. 1, and Fig. 3 is the operating sequence of Fig. 2. 4 is a waveform diagram of essential parts of the device, FIG. 5 is a block diagram of an air conditioner equipped with the frequency control device according to claim 3 of the present invention, and FIG. FIG. 7 is a flowchart showing the operating order of FIG. 6, FIG. 8 is a waveform diagram of the main part of the same device, and FIG. 9 is a waveform diagram of a conventional frequency control device. 2... Compressor, 3, 5... First and second control units, 6°7... First and second temperature detection units, 9... Comparison and determination means, lO... Frequency conversion Device, 11... Variation speed changing means, 12. Fan motor rotation speed switching relay, 1
3. Fan motor of outdoor unit, 14. Fan motor of indoor unit, ■, ... speed of increase in frequency, ■2.
...Frequency fall rate. Agent Yoshihiro Morimoto Figure 3 (gu-t) Classmate imperial illness T = 1 button negative finger L'℃ C? -21 Toru Ak bow side second included and Ding 1 (-~3) Shatsuri Ki, key word, Yoshitsubo and 5) 9 one note ω
Claims (1)
波数を、能力の上昇時には次第に上昇させ、能力の低下
時には次第に下降させる周波数変換装置を設けるととも
に、圧縮機の負荷の大きさを検出する負荷検出手段と、
低負荷の検出時には周波数上昇と下降速度を同一にして
、高負荷の検出時には下降速度を上昇速度よりも遅くす
るように前記周波数変換装置に指示する変化速度変更手
段とを設けた空気調和機の周波数制御装置。 ２、冷凍サイクルに介装された圧縮機に印加する電源周
波数を、能力の上昇時には次第に上昇させ、能力の低下
時には次第に下降させる周波数変換装置を設けるととも
に、能力の低下時には周波数の下降速度を上昇速度より
も遅くするように前記周波数変換装置に指示する変化速
度変更手段とを設けた空気調和機の周波数制御装置。 ３、能力の低下時あるいは高負荷時の能力の低下時にフ
ァンモータの回転数を、運転モードに応じて能力の上昇
時とは切り換える送風機速度変更手段を設けた請求項１
または請求項２に記載の空気調和機の周波数制御装置。[Claims] 1. A frequency conversion device is provided that gradually increases the power frequency applied to the compressor installed in the refrigeration cycle when the capacity increases, and gradually decreases it when the capacity decreases, and also reduces the load on the compressor. load detection means for detecting the magnitude of the
An air conditioner comprising: change speed changing means for instructing the frequency conversion device to make the frequency rise and fall speeds the same when a low load is detected, and to make the fall speed slower than the rise speed when a high load is detected. Frequency control device. 2. A frequency conversion device is installed that gradually increases the power frequency applied to the compressor installed in the refrigeration cycle when the capacity increases, and gradually decreases it when the capacity decreases, and also increases the speed at which the frequency decreases when the capacity decreases. A frequency control device for an air conditioner, comprising: a change rate changing means for instructing the frequency converter to make the frequency slower than the speed. 3. Claim 1, further comprising a blower speed changing means for switching the rotation speed of the fan motor when the capacity decreases or when the capacity decreases under high load from when the capacity increases, depending on the operation mode.
Or the frequency control device for an air conditioner according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63062751A JP2533157B2 (en) | 1988-03-16 | 1988-03-16 | Air conditioner frequency controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63062751A JP2533157B2 (en) | 1988-03-16 | 1988-03-16 | Air conditioner frequency controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01237373A true JPH01237373A (en) | 1989-09-21 |
| JP2533157B2 JP2533157B2 (en) | 1996-09-11 |
Family
ID=13209420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63062751A Expired - Lifetime JP2533157B2 (en) | 1988-03-16 | 1988-03-16 | Air conditioner frequency controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2533157B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101925A (en) * | 1992-06-18 | 1994-04-12 | Samsung Electronics Co Ltd | Method of controlling start of compressor for air conditioner |
| JP2002288726A (en) * | 2001-03-28 | 2002-10-04 | Sanyo Electric Co Ltd | Automatic vending machine control device |
| CN105571068A (en) * | 2016-01-04 | 2016-05-11 | 广东美的暖通设备有限公司 | Operation control method and device for air conditioner |
| CN115059988A (en) * | 2022-05-30 | 2022-09-16 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56129595A (en) * | 1980-03-14 | 1981-10-09 | Toshiba Corp | Operation controlling device for motor |
| JPS5917897A (en) * | 1982-07-16 | 1984-01-30 | Matsushita Electric Ind Co Ltd | Control device for operation of compressor |
-
1988
- 1988-03-16 JP JP63062751A patent/JP2533157B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56129595A (en) * | 1980-03-14 | 1981-10-09 | Toshiba Corp | Operation controlling device for motor |
| JPS5917897A (en) * | 1982-07-16 | 1984-01-30 | Matsushita Electric Ind Co Ltd | Control device for operation of compressor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101925A (en) * | 1992-06-18 | 1994-04-12 | Samsung Electronics Co Ltd | Method of controlling start of compressor for air conditioner |
| JP2002288726A (en) * | 2001-03-28 | 2002-10-04 | Sanyo Electric Co Ltd | Automatic vending machine control device |
| CN105571068A (en) * | 2016-01-04 | 2016-05-11 | 广东美的暖通设备有限公司 | Operation control method and device for air conditioner |
| CN115059988A (en) * | 2022-05-30 | 2022-09-16 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
| CN115059988B (en) * | 2022-05-30 | 2023-07-18 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2533157B2 (en) | 1996-09-11 |
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