JPS6192377A - Control device of electrically driven expansion valve in air conditioning machine - Google Patents
Control device of electrically driven expansion valve in air conditioning machineInfo
- Publication number
- JPS6192377A JPS6192377A JP59214517A JP21451784A JPS6192377A JP S6192377 A JPS6192377 A JP S6192377A JP 59214517 A JP59214517 A JP 59214517A JP 21451784 A JP21451784 A JP 21451784A JP S6192377 A JPS6192377 A JP S6192377A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- expansion valve
- opening degree
- electric expansion
- electrically driven
- 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.)
- Pending
Links
- 238000004378 air conditioning Methods 0.000 title description 2
- 238000005057 refrigeration Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 241000862969 Stella Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
- F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はインバータ式空気調和機の電動式膨張弁の制御
装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for an electric expansion valve of an inverter type air conditioner.
従来の技術
従来のインバータ式空気調和機の電動式膨張弁制御装置
では、第６図に示すような圧縮機の回転周波数が変化し
、圧縮轡からの冷媒循環量は回転周波数に比例するので
、電動式膨張弁の開度を、回転周波数が高い場合には開
度を大きく、回転周波数が低い場合には開度を小さくし
ている。BACKGROUND OF THE INVENTION In a conventional electric expansion valve control device for an inverter type air conditioner, the rotational frequency of the compressor changes as shown in Fig. 6, and the amount of refrigerant circulated from the compressor is proportional to the rotational frequency. When the rotation frequency is high, the opening degree of the electric expansion valve is increased, and when the rotation frequency is low, the opening degree is decreased.
そして圧碑機停止時には、通常インバータ大空
ゝ気調和機では圧縮男停止前の回転周波数は空調負荷が
小計６と７５）ら・冷暖房能力を最′」゛とする為最低
回転周波数で運転していることもあって、電動式膨張弁
の一度も最低回転周波数と同じく、開度が最小となって
い冬。・
このような制御は例えば、実開昭５９−５２３５９号公
報に示されている。When the inscription machine is stopped, the inverter normally
In the case of an air conditioner, the rotational frequency before the compression valve stops is because the air conditioning load is 6 and 75), and the electric expansion valve is operated at the lowest rotational frequency in order to maximize the cooling and heating capacity. As with the lowest rotational frequency, the opening degree is also the lowest in winter. - Such control is shown in, for example, Japanese Utility Model Application Publication No. 59-52359.
□
発明が解決しようとする問題点
このよ？な従来の圧縮機の停止時の電動式膨張弁の開度
が最小となる制御では、圧縮機の停止時の冷凍サイクル
の高低圧の圧力バランスは、この電動式膨張弁の開度に
より行なわれるので、次に圧縮機が起動する、場合、高
低圧の圧力差が最大となシ、圧縮機が起動しなかったシ
、過電流が流れたシし、圧縮機ならびに、その制御を行
なう、インバータ部に悪影響があり、また必要な時に起
動しない為に温度制御幅が大きくなり体感も悪くなって
いた。□ Is this the problem that the invention is trying to solve? In conventional control where the opening degree of the electric expansion valve is minimized when the compressor is stopped, the pressure balance between high and low pressures in the refrigeration cycle is determined by the opening degree of the electric expansion valve when the compressor is stopped. Therefore, if the compressor starts next, the pressure difference between high and low pressure is maximum, the compressor does not start, or an overcurrent flows, then the compressor and the inverter that controls it This had a negative effect on the temperature control section, and since it did not start up when needed, the temperature control range became large and the experience was poor.
本発明はかかる点に鑑みてなされたもので、圧縮機停止
時の冷凍サイクルの圧力バランスを小さくすることを目
的としている。The present invention has been made in view of this problem, and an object of the present invention is to reduce the pressure balance of the refrigeration cycle when the compressor is stopped.
問題点を解決するだめの手段
本発明は、上記問題点を解決するため、圧縮機停止時の
電動式膨張弁の開度を、圧縮機運転時の最大開度となる
よう電動式膨張弁への動作パルスを送るものである。Means to Solve the Problems In order to solve the above problems, the present invention changes the opening degree of the electric expansion valve when the compressor is stopped to the maximum opening degree when the compressor is running. It sends the operating pulse.
作用
本発明は上記した制御により、圧縮機運転時の最大開度
を、圧縮機停止時にも使用することで、圧縮機停止時の
冷凍サイクルの高低圧の圧力バランスを一定時間内にお
いて最小とすることができる。Operation The present invention minimizes the pressure balance between high and low pressures in the refrigeration cycle within a certain period of time by using the maximum opening degree during compressor operation and when the compressor is stopped using the above-described control. be able to.
実施例
第１図は、本発明の一実施例を示す圧縮機の回転周波数
と電動式膨張弁の開度との関係を示すグラフである。第
２図は空気調和機の冷凍サイクル図であり、１は圧縮機
、２は室内側熱交換２３，３は室外側熱交換器。４は電
動式膨張弁、５は電動式膨張弁４及び、圧縮機１を制御
する制御部、６は圧縮機１を駆動するインバ−タ部であ
る。Embodiment FIG. 1 is a graph showing the relationship between the rotational frequency of a compressor and the opening degree of an electric expansion valve according to an embodiment of the present invention. FIG. 2 is a refrigeration cycle diagram of an air conditioner, where 1 is a compressor, 2 is an indoor heat exchanger 23, and 3 is an outdoor heat exchanger. 4 is an electric expansion valve; 5 is a control section that controls the electric expansion valve 4 and the compressor 1; and 6 is an inverter section that drives the compressor 1.
第１図において、圧縮機運転中、圧縮機１の回転周波数
はＦｍ１ｎからＦｍａｘであり、冷凍サイクルの循環量
は、Ｆ ｍ ｉ ｎでは最小で、Ｆｍａｘでは最大とな
る。この循環量に応じて、電動式膨張弁４の開度は、Ｆ
ｍ ｉ ｎでは開度が最小、Ｆｍａｘでは開度が最大
となる。一方、圧縮機１の停止には、冷凍サイクルの圧
力バランスを最も小さくする為に電動式膨張弁の開度を
、圧縮機運転中の最大開度である回転周波数がＦｍａｘ
の時と同じとする。In FIG. 1, during compressor operation, the rotational frequency of the compressor 1 is from Fm1n to Fmax, and the circulation amount of the refrigeration cycle is minimum at Fmin and maximum at Fmax. Depending on this circulation amount, the opening degree of the electric expansion valve 4 is F.
The opening degree is the minimum at min, and the opening degree is the maximum at Fmax. On the other hand, to stop the compressor 1, the opening degree of the electric expansion valve is set to Fmax, which is the maximum opening degree during compressor operation, in order to minimize the pressure balance of the refrigeration cycle.
Assume that it is the same as when .
第３図は電動式膨張弁の構造を示す断面図であり、７は
パルスモータであり、パルス数により回転角度が決定さ
れる。８は弁で、パルスモータの回転を垂直方向の変化
量に変換することにより、弁の開度が調節される。FIG. 3 is a sectional view showing the structure of an electric expansion valve, and 7 is a pulse motor, and the rotation angle is determined by the number of pulses. Reference numeral 8 denotes a valve, and the opening degree of the valve is adjusted by converting the rotation of the pulse motor into an amount of change in the vertical direction.
第４図は本発明の一実施例のフローチャート図である。FIG. 4 is a flow chart diagram of one embodiment of the present invention.
まずステップ１で圧縮機１の運転、停止の判断が行なわ
れ、圧縮機１が運転であれば、ステップ１の判定はＮで
あり、ステラ少２でその回転周波数の室温等により決定
される。回転周波数が決定されると、第１図のグラフよ
り、′電動式膨張弁４の開度が規定されており、ステッ
プ３でその値を読み出しパルスモータを駆動するに必要
なパルス数Ｐを、ステップ４でセットする。次に、ステ
ップ５で現在位置弁開度のだめのパルス数Ｐ１を読み出
し、ステップ６で移動先のパルス数Ｐと現在截置のパル
ス数Ｐ゛との差△Ｐを決定し、ステップ７でその差△Ｐ
を出力すれば、所定め弁開度圧縮機停止時には、ステッ
プ１の判定はＹであり弁開度を回転周波数が最大の時に
同じくするのでステップ３１でパルス数′ＰはＰｍａｘ
とし、以下同じように現在位置と次回位置とのパルス薮
の差△Ｐをパルスモータに出力すればよい。First, in step 1, it is determined whether the compressor 1 is running or not, and if the compressor 1 is running, the determination in step 1 is N, which is determined based on the rotation frequency, room temperature, etc. at Stella Low 2. Once the rotational frequency is determined, the opening degree of the electric expansion valve 4 is defined according to the graph in FIG. Set in step 4. Next, in Step 5, the number of pulses P1 at the current position valve opening is read out, in Step 6, the difference △P between the number of pulses P at the destination and the number P of pulses at the current position is determined, and in Step 7, the difference △P is determined. Difference △P
If the specified valve opening is output, when the compressor is stopped, the judgment in step 1 is Y, and the valve opening is the same as when the rotation frequency is maximum, so in step 31, the number of pulses 'P becomes Pmax.
Then, in the same way, the difference ΔP in pulse width between the current position and the next position may be output to the pulse motor.
第５図は本発明の一実施例の駆動回路である。FIG. 5 shows a drive circuit according to an embodiment of the present invention.
発明の効果
以上述べてきたように本発明によれば、圧縮機停止時の
電動式膨張弁の開度を圧縮機運転時の最大開度とするこ
とにより、圧縮機停止時の冷凍サイクルの圧力バランス
を最小とすることができ、次に圧縮機が起動する時の起
動不良は解消され、圧縮機起動不良による過電流による
ポ縮機及びインバータ部の劣化や、また必要な時に起動
しない為に室温制御幅が大きくなり体感が悪くなること
がなくなり、きわめて有効な効果を有する。Effects of the Invention As described above, according to the present invention, the opening degree of the electric expansion valve when the compressor is stopped is set to the maximum opening degree when the compressor is operating, thereby reducing the pressure in the refrigeration cycle when the compressor is stopped. The balance can be minimized, and the problem of startup failure when the compressor starts up next time is eliminated, and it prevents deterioration of the compressor and inverter due to overcurrent caused by failure to start the compressor, and prevents the compressor from not starting up when needed. The room temperature control range is widened and the sensation of the body does not deteriorate, which is extremely effective.
第１図は本発明の一実施例の電動式膨張弁の開度と圧縮
機の回転周波数との関係図、第２図は本発明の一実施例
の冷凍サイクル図、第３図は電動式膨張弁の構造を示す
断面図、第４図は本発明の一実施例を示すフローチャー
ト図、第５図はその駆動回路図、第６図は従来の電動式
膨張弁の開度と圧縮機の回転周波数との関係図である。
１・・・・・・圧縮機、２ ・・・室内側熱交換器、３
・・室外側熱交換器、４・・・・・・電動式膨張弁、
５・・・ 制御部、６・・・・インバータ部。
第 １ 図
冴！ＩＩ棟・＠ＩｔＩ１１凌散
第２図
第３図
グ
第４図Fig. 1 is a diagram of the relationship between the opening degree of the electrically operated expansion valve and the rotational frequency of the compressor according to an embodiment of the present invention, Fig. 2 is a refrigeration cycle diagram of an embodiment of the present invention, and Fig. 3 is a diagram of the electrically operated expansion valve. 4 is a flowchart showing an embodiment of the present invention, FIG. 5 is a drive circuit diagram thereof, and FIG. 6 is a diagram showing the opening degree of a conventional electric expansion valve and the compressor. It is a relationship diagram with rotation frequency. 1...Compressor, 2...Indoor heat exchanger, 3
...Outdoor heat exchanger, 4...Electric expansion valve,
5... Control section, 6... Inverter section. 1st illustration! Building II・＠ItI11 Ryosan Figure 2 Figure 3 Figure 4
Claims (1)
換器およびこの室内側熱交換器と室外側熱交換器との間
に設けた電動式膨張弁によって冷凍サイクルを形成し、
前記インバータ式圧縮機の停止時の前記電動式膨張弁の
開度を、圧縮機運転時の最大開度とし、さらに前記イン
バータ式圧縮機の回転周波数により、電動式膨張弁の開
度を制御する制御部を有した空気調和機の電動式膨張弁
制御装置。A refrigeration cycle is formed by an inverter compressor, an indoor heat exchanger, an outdoor heat exchanger, and an electric expansion valve provided between the indoor heat exchanger and the outdoor heat exchanger,
The opening degree of the electric expansion valve when the inverter compressor is stopped is set as the maximum opening degree when the compressor is operating, and the opening degree of the electric expansion valve is further controlled by the rotation frequency of the inverter compressor. An electric expansion valve control device for an air conditioner that has a control section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59214517A JPS6192377A (en) | 1984-10-12 | 1984-10-12 | Control device of electrically driven expansion valve in air conditioning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59214517A JPS6192377A (en) | 1984-10-12 | 1984-10-12 | Control device of electrically driven expansion valve in air conditioning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6192377A true JPS6192377A (en) | 1986-05-10 |
Family
ID=16657028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59214517A Pending JPS6192377A (en) | 1984-10-12 | 1984-10-12 | Control device of electrically driven expansion valve in air conditioning machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6192377A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006114246A1 (en) * | 2005-04-25 | 2006-11-02 | Emerson Electric Gmbh & Co. Ohg | Method of operating a refrigerating machine |
-
1984
- 1984-10-12 JP JP59214517A patent/JPS6192377A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006114246A1 (en) * | 2005-04-25 | 2006-11-02 | Emerson Electric Gmbh & Co. Ohg | Method of operating a refrigerating machine |
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