JPS5910536Y2 - Refrigeration cycle control device - Google Patents
Refrigeration cycle control deviceInfo
- Publication number
- JPS5910536Y2 JPS5910536Y2 JP1977088490U JP8849077U JPS5910536Y2 JP S5910536 Y2 JPS5910536 Y2 JP S5910536Y2 JP 1977088490 U JP1977088490 U JP 1977088490U JP 8849077 U JP8849077 U JP 8849077U JP S5910536 Y2 JPS5910536 Y2 JP S5910536Y2
- Authority
- JP
- Japan
- Prior art keywords
- refrigeration cycle
- compressor
- temperature
- discharge temperature
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Air Conditioning Control Device (AREA)
Description
【考案の詳細な説明】
本考案は空気調和機に係り、特にその冷凍サイクルの制
御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner, and particularly to a control device for a refrigeration cycle thereof.
従来の空気調和機においても冷凍サイクルの制御は行わ
れている。The refrigeration cycle is also controlled in conventional air conditioners.
これは、たとえば騒音低減の目的で室内温度および外気
温度を検出し、この検出信号に基いて室内外ファンの速
度を変えるものとか、過負荷対策としてコンプレツサの
吐出圧力を検出し、その検出信号でコンプレツサ、ファ
ンのオンオフ制御を行うもの等の単純な制御を行うもの
である。For example, this detects indoor and outdoor air temperatures for the purpose of noise reduction and changes the speed of indoor and outdoor fans based on this detection signal, or detects the discharge pressure of a compressor and uses that detection signal as a countermeasure against overload. It performs simple controls such as on/off control of compressors and fans.
しかしながら、このような制御では、冷凍サイクル保護
とか節電効果という点から見た場合、不充分なものであ
る。However, such control is insufficient in terms of refrigeration cycle protection and power saving effects.
したがって本考案の目的は、冷凍サイクルの保護および
節電対策を充分に行うためきめ細かな冷凍サイクルの制
御を行う装置を提供することである。Therefore, an object of the present invention is to provide a device that performs detailed control of the refrigeration cycle in order to sufficiently protect the refrigeration cycle and take power saving measures.
本考案はこの目的達或のため、冷凍負荷の大小に応じて
変化するコンプレツサの吐出温度を検出し、この検出信
号に基いてコンテ゛ンサまたはエバポレータのファン速
度制御およびコンプレツサのオンオフ制御を行う冷凍サ
イクルの制御装置を構威したものである。To achieve this objective, the present invention detects the discharge temperature of the compressor, which changes depending on the size of the refrigeration load, and controls the fan speed of the condenser or evaporator and the on/off control of the compressor based on this detection signal. It consists of a control device.
以下添付図面を参照して本考案の実施例を説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本考案の適用対象である冷凍サイクルの１例を
示したもので、コンプレツサＣから送り出された冷媒は
コンデンサＣＯＮＤにおいて室外ファンＦｏとの協働に
より熱交換が行われ、キャピラリーチューブを介してエ
バポレータＥＶに到り、室内ファンＦｉとの協働により
熱交換を行う。Figure 1 shows an example of a refrigeration cycle to which the present invention is applied. The refrigerant sent out from the compressor C undergoes heat exchange in the condenser COND in cooperation with the outdoor fan Fo, and the refrigerant passes through the capillary tube. The air then reaches the evaporator EV, where heat exchange is performed in cooperation with the indoor fan Fi.
この場合、負荷状態に応じてソレノイドバルブＳｖを開
閉し、冷媒循環量を加減する。In this case, the solenoid valve Sv is opened and closed depending on the load condition to adjust the amount of refrigerant circulation.
ＲＴはレシーバタン夕である。RT is the receiver tandem.
この冷凍サイクルにおいて、コンプレツサＣの吐出温度
Ｔｄ、コンデンサＣＯＮＤの凝縮温度Ｔｃは冷凍負荷の
大小に対応した値を有するから、これらがいかなる値を
とるかに基いてコンプレツサとか室外ファンの制御を行
えば、冷凍負荷に応じて空気調和機を制御することがで
きる。In this refrigeration cycle, the discharge temperature Td of the compressor C and the condensation temperature Tc of the condenser COND have values corresponding to the magnitude of the refrigeration load, so the compressor and outdoor fan can be controlled based on the values these take. , the air conditioner can be controlled according to the refrigeration load.
第２図ａ，ｌ）はコンデンサＣＯＮＤの凝縮温度Ｔｃが
いかなる値であるかによって空気調和機のコンプレツサ
および室外ファンの制御を行う実施例を示すブロック線
図およびその動作を示すフローチャートである。FIGS. 2a and 2l) are a block diagram and a flowchart showing the operation of an embodiment in which the compressor of the air conditioner and the outdoor fan are controlled depending on the value of the condensing temperature Tc of the condenser COND.
同図ａにおいて、制御回路ＣＣは凝縮温度センサＳの検
出信号ＴＣを温度設定回路ＴＳの設定温度Ｔａ ，Ｔｂ
と大小比較し、その比較結果に基いて空調機の室外ファ
ンＦＯの回転速度制御、コンプレツサＣのオンオフ制御
を行う。In the same figure a, the control circuit CC converts the detection signal TC of the condensing temperature sensor S into the set temperatures Ta, Tb of the temperature setting circuit TS.
The rotational speed of the outdoor fan FO of the air conditioner and the on/off control of the compressor C are controlled based on the comparison results.
ここで、設定温度Ｔａは過負荷点であり、概ね４５〜５
０℃であり、またＴｂは上限温度であり、概ね６０℃で
ある。Here, the set temperature Ta is the overload point and is approximately 45 to 5
0°C, and Tb is the upper limit temperature, which is approximately 60°C.
次に同図ｂのフローチャートにより動作を説明する。Next, the operation will be explained with reference to the flowchart shown in FIG.
いま運転指令が与えられたとし、このときのコンプレツ
サの凝縮温度Ｔｃが過負荷点Ｔａ以上であるか否かの判
定が行われ、以上であれば室外ファンを高速運転し、未
満であれば室外ファンを常連運転する。Suppose that an operation command is given now, and a determination is made as to whether or not the condensing temperature Tc of the compressor at this time is above the overload point Ta. If it is above, the outdoor fan is operated at high speed, and if it is below, the outdoor fan is operated at high speed. Run the fan regularly.
室外ファンを高速運転させた場合に、凝縮温度Ｔｃが上
限温度Ｔｂ以上であればコンプレツサをオフして凝縮温
度がＴｂ以下に下るのを待つ。When the outdoor fan is operated at high speed, if the condensing temperature Tc is higher than the upper limit temperature Tb, the compressor is turned off and the condensing temperature is waited for to fall below Tb.
Ｔｂ以下になればコンプレツサを再度オンし、冫疑縮温
度Ｔｃが過負荷点Ｔａ以上か否かに基いて室外ファンの
速度を制御する。When the temperature falls below Tb, the compressor is turned on again, and the speed of the outdoor fan is controlled based on whether or not the compression temperature Tc is above the overload point Ta.
第３図はコンプレツサＣの吐出温度Ｔｄがいかなる値で
あるかによってコンプレツサ、室外ファンおよび冷媒循
環量の制御を行う他の実施例を示す。FIG. 3 shows another embodiment in which the compressor, outdoor fan, and refrigerant circulation amount are controlled depending on the value of the discharge temperature Td of the compressor C.
同図ａにおいて、制御回路ＣＣは、吐出温度センサＳ１
の検出信号Ｔｄおよび室内温度センサＳ２の検出信号Ｔ
ｒが温度設定回路ＴＳの設定値Ｔｅ ，Ｔｆ ，Ｔｇ，
Ｔｈといかなる関係にあるかによって、冷媒循環量制御
用のソレノイドバルブＳ■、室外ファンＦｏおよびコン
プレツサＣの制御を行う。In the figure a, the control circuit CC includes a discharge temperature sensor S1
The detection signal Td of the indoor temperature sensor S2 and the detection signal T of the indoor temperature sensor S2
r is the set value Te, Tf, Tg of the temperature setting circuit TS,
The solenoid valve S■ for controlling the amount of refrigerant circulation, the outdoor fan Fo, and the compressor C are controlled depending on the relationship with Th.
ここで、設定温度Ｔｅは急速冷房に移るべき温度で概ね
２８℃程度、Ｔｆは過負荷点で９０℃程度、Ｔｇは冷媒
循環量を最大限にしても不充分で室外ファンの強風運転
に移行する温度で１００℃程度、Ｔｈは危険温度で１２
０℃程度である。Here, the set temperature Te is the temperature at which rapid cooling should be started, which is approximately 28°C, Tf is about 90°C at the overload point, and Tg is insufficient even if the refrigerant circulation amount is maximized, so the outdoor fan will switch to strong wind operation. The temperature is about 100℃, and the dangerous temperature is 12
The temperature is about 0°C.
次に同図ｂにより動作を説明する。Next, the operation will be explained with reference to FIG.
いま運転指令が与えられたとし、このときの室内温度Ｔ
ｒが急速冷房に移る温度Ｔｅ以上か否かが判定される。Suppose that a driving command is now given, and the indoor temperature T at this time is
It is determined whether or not r is equal to or higher than the temperature Te at which rapid cooling is performed.
以上であればソレノイドバルブＳ■を閉じてレシーバタ
ンクＲＴへの冷媒流入を止めることにより冷房能力を高
める。If this is the case, the cooling capacity is increased by closing the solenoid valve S■ to stop the refrigerant from flowing into the receiver tank RT.
これにより室内温度ＴｒがＴｅよりも低くなると、コン
プレツサの吐出温度Ｔｄが過負荷点Ｔｆ以上であるか否
かによりソレノイドバルブＳＶの開閉制御を行う。As a result, when the indoor temperature Tr becomes lower than Te, the opening/closing control of the solenoid valve SV is performed depending on whether the discharge temperature Td of the compressor is equal to or higher than the overload point Tf.
過負荷点以上であればソレノイドバルブＳＶを開いて冷
媒の循環量を減らし、未満であればソレノイドバルブＳ
Ｖを閉じて冷房能力を高いままにしておく。If it is above the overload point, solenoid valve SV is opened to reduce the refrigerant circulation, and if it is less than the overload point, solenoid valve S is opened.
Close the V to keep the cooling capacity high.
これにより室内温度の制御が行われる。This controls the indoor temperature.
ソレノイドバルブＳｖを開いて冷媒の循環量を減らして
もコンプレツサの吐出温度Ｔｄが低下せず室外ファンを
強風運転すべき温度Ｔｇ以上になると室外ファンを強風
運転して吐出温度Ｔｄの低下を図る。Even if the solenoid valve Sv is opened to reduce the circulating amount of refrigerant, the discharge temperature Td of the compressor does not decrease and when the temperature Tg at which the outdoor fan should be operated with strong winds is exceeded, the outdoor fan is operated with strong winds to lower the discharge temperature Td.
また吐出温度Ｔｄがこの温度Ｔｇよりも低いと室外ファ
ンは弱風運転とし、通常の室内温度の制御運転のみを行
う。Further, when the discharge temperature Td is lower than this temperature Tg, the outdoor fan operates in a weak wind mode and performs only normal indoor temperature control operation.
一方、室外ファンを強風運転しても吐出温度Ｔｄが低下
せず危険温度Ｔｈ以上になったときはコンプレツサをオ
フとして吐出温度Ｔｄの低下を待ち、危険温度Ｔｈ未満
に低下したときコンプレツサを再びオンとして室内温度
制御運転に戻る。On the other hand, if the discharge temperature Td does not decrease even when the outdoor fan is operated with strong wind and reaches the critical temperature Th or higher, the compressor is turned off and waits for the discharge temperature Td to decrease, and when the discharge temperature Td drops below the critical temperature Th, the compressor is turned on again. Return to indoor temperature control operation.
上記実施例における制御回路は近時入手し易くなったマ
イクロコンピュータを用い、また温度設定回路にはたと
えばＲＯＭ等を用いることにより容易に装置構或するこ
とができる。The control circuit in the above embodiment can be easily configured by using a microcomputer, which has recently become easy to obtain, and by using, for example, a ROM or the like for the temperature setting circuit.
また、上記実施例における室外ファンの速度制御に代え
て室内ファンの速度を同じく負荷低減するように変化さ
せてもよい。Further, instead of controlling the speed of the outdoor fan in the above embodiment, the speed of the indoor fan may be changed to similarly reduce the load.
本考案は上述のように、冷凍負荷の大小に応じて変化す
るコンプレツサの吐出温度を検出し、この検出信号に基
いてコンデンサまたはエバポレータのファン速度制御、
およびコンプレツサのオンオフ制御を行うようにしたた
め、要求される運転状態に常に最適な冷凍サイクルの制
御を行うことができ、冷凍サイクル保護および節電を加
味した制御を行うことができる。As mentioned above, the present invention detects the compressor discharge temperature, which changes depending on the size of the refrigeration load, and controls the condenser or evaporator fan speed based on this detection signal.
Since the compressor is controlled on and off, the refrigeration cycle can always be controlled optimally for the required operating conditions, and control can be performed that takes into account refrigeration cycle protection and power saving.
第１図は本考案の適用対象である冷凍サイクルの説明図
、第２図ａ，ｌ）は本考案の一実施例を示すブロック線
図およびその動作を説明するためのフローチャート、第
３図ａ，ｌ）は本考案の他の実施例を示すブロック線図
およびその動作を説明するためのフローチャートである
。
Ｃ・・・・・・コンプレツサ、ＣＯＮＤ・・・・・・コ
ンテ゛ンサ、Ｓｖ・・・・・・ソレノイドバルブ、Ｆｏ
・・・・・・室外ファン、Ｔ・・・・・・温度。Fig. 1 is an explanatory diagram of a refrigeration cycle to which the present invention is applied; Fig. 2 a, l) is a block diagram showing an embodiment of the present invention and a flowchart for explaining its operation; Fig. 3 a) , l) is a block diagram showing another embodiment of the present invention and a flowchart for explaining its operation. C...Compressor, COND...Container, Sv...Solenoid valve, Fo
...Outdoor fan, T...Temperature.
Claims (1)
を直列接続すると共に、弁、レシーバタンクおよびキャ
ピラリチューブを直列接続して前記絞り装置に並列接続
してなる冷凍サイクルと、この冷凍サイクルにおけるコ
ンプレツサ、コンデンサもしくはエバポレータのファン
、または弁を制御する回路とをそなえた冷凍サイクルの
制御装置において、前記冷凍サイクルにおける冷凍負荷
の大小に応じて変化するコンプレツサの吐出温度を検出
する要素と、冷凍負荷が過負荷状態となったときおよび
この過負荷状態を超える所定の負荷状態になったときを
含む少くとも２つの場合における前記吐出温度の値が予
め設定される温度設定回路と、前記検出要素の出力が前
記温度設定回路の過負荷状態出力以上になったとき前記
コンデンサまたはエバポレータの少くとも一方のファン
速度を負荷低減するように変化させ、さらに過負荷状態
を超える所定の負荷状態出力以上になったとき前記コン
プレツサをオフする動作を併せ行う制御回路とをそなえ
たことを特徴とする冷凍サイクルの制御装置。A refrigeration cycle in which a compressor, a condenser, an evaporator, and a throttling device are connected in series, and a valve, a receiver tank, and a capillary tube are connected in series and connected in parallel to the throttling device; A refrigeration cycle control device that includes a circuit that controls a fan or a valve includes an element that detects a compressor discharge temperature that changes depending on the size of the refrigeration load in the refrigeration cycle, and an element that detects a compressor discharge temperature that changes depending on the size of the refrigeration load in the refrigeration cycle. a temperature setting circuit in which a value of the discharge temperature is set in advance in at least two cases including when the discharge temperature reaches a predetermined load state exceeding the overload state; and a temperature setting circuit in which the output of the detection element is set in advance. changing the fan speed of at least one of said capacitor or evaporator to reduce the load when the overload condition output exceeds a predetermined load condition output; and turning off said compressor when the predetermined load condition output exceeds an overload condition. A refrigeration cycle control device characterized by comprising a control circuit that also performs the following operations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977088490U JPS5910536Y2 (en) | 1977-07-04 | 1977-07-04 | Refrigeration cycle control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977088490U JPS5910536Y2 (en) | 1977-07-04 | 1977-07-04 | Refrigeration cycle control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5417155U JPS5417155U (en) | 1979-02-03 |
| JPS5910536Y2 true JPS5910536Y2 (en) | 1984-04-03 |
Family
ID=29015008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1977088490U Expired JPS5910536Y2 (en) | 1977-07-04 | 1977-07-04 | Refrigeration cycle control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5910536Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4852041A (en) * | 1971-11-01 | 1973-07-21 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS532357Y2 (en) * | 1973-11-07 | 1978-01-21 |
-
1977
- 1977-07-04 JP JP1977088490U patent/JPS5910536Y2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4852041A (en) * | 1971-11-01 | 1973-07-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5417155U (en) | 1979-02-03 |
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