JPH0170061U - - Google Patents
Info
- Publication number
- JPH0170061U JPH0170061U JP1987163095U JP16309587U JPH0170061U JP H0170061 U JPH0170061 U JP H0170061U JP 1987163095 U JP1987163095 U JP 1987163095U JP 16309587 U JP16309587 U JP 16309587U JP H0170061 U JPH0170061 U JP H0170061U
- Authority
- JP
- Japan
- Prior art keywords
- hot gas
- control
- opening
- control system
- electric expansion
- 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
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000003507 refrigerant Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 10
- 230000002123 temporal effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Description
第１図ないし第５図は本考案の１実施例を示し
、第１図は冷凍装置の系統図、第２図は制御ブロ
ツク図、第３図は制御フローチヤート、第４図は
過熱度と冷却能力との関係を示す線図、第５図は
能力制御運転時の目標過熱度、ホツトガス制御弁
開度、吹出空気温度の時間的変化を示す線図であ
る。第６図及び第７図は本考案の第２の実施例を
示し、第６図は制御ブロツク図、第７図は制御フ
ローチヤートである。第８図及び第９図は本考案
の第３の実施例を示し、第８図は制御ブロツク図
、第９図は制御フローチヤートである。第１０図
ないし第１２図は従来の冷凍装置の１例を示し、
第１０図は系統図、第１１図は吹出空気温度の時
間的変化を示す線図、第１２図は外気温度に対す
る冷却負荷と冷却能力の変化を示す線図である。
１……圧縮機、２……凝縮器、３０……電動膨
張弁、４……蒸発器、３……ホツトガスバイパス
回路、５……ホツトガス制御弁、１４……温度偏
差検出手段、１１……過熱度比較手段、１３，２
４，２８……電動膨張弁開度決定手段。
Figures 1 to 5 show one embodiment of the present invention; Figure 1 is a system diagram of the refrigeration system, Figure 2 is a control block diagram, Figure 3 is a control flowchart, and Figure 4 is a diagram of the degree of superheating. FIG. 5 is a diagram showing the relationship with cooling capacity, and FIG. 5 is a diagram showing temporal changes in target superheat degree, hot gas control valve opening degree, and blowing air temperature during capacity control operation. 6 and 7 show a second embodiment of the present invention, with FIG. 6 being a control block diagram and FIG. 7 being a control flowchart. 8 and 9 show a third embodiment of the present invention, with FIG. 8 being a control block diagram and FIG. 9 being a control flowchart. Figures 10 to 12 show an example of a conventional refrigeration system,
FIG. 10 is a system diagram, FIG. 11 is a diagram showing temporal changes in the temperature of the blown air, and FIG. 12 is a diagram showing changes in cooling load and cooling capacity with respect to outside air temperature. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Condenser, 30... Electric expansion valve, 4... Evaporator, 3... Hot gas bypass circuit, 5... Hot gas control valve, 14... Temperature deviation detection means, 11... ...Superheat degree comparison means, 13,2
4, 28...Electric expansion valve opening determining means.
Claims (1)
冷凍サイクルを構成するとともに圧縮機からの吐
出ガスを蒸発器に導くホツトガス制御弁を有する
ホツトガスバイパス回路を備えてなる冷凍装置に
おいて、制御対象温度と設定温度との温度偏差が
所定値以上のとき前記ホツトガス制御弁を全閉と
するとともに前記電動膨張弁を前記蒸発器の出口
における冷媒過熱度が一定値となるよう開度調節
する第１の制御系と、前記温度偏差が所定値以内
のとき同温度偏差に応じて前記ホツトガス制御弁
の開度調節を行う第２の制御系と、同第２の制御
系により開度調節された前記ホツトガス制御弁の
開度が所定範囲を越えたとき、前記冷媒過熱度の
制御目標値を変更し、冷却能力を増減するよう前
記電動膨張弁の開度調節を行う第３の制御系から
なることを特徴とする冷凍装置の制御装置。 In a refrigeration system comprising a refrigeration cycle including a compressor, a condenser, an electric expansion valve, and an evaporator, and a hot gas bypass circuit having a hot gas control valve that guides discharged gas from the compressor to the evaporator, the temperature to be controlled is and a set temperature, the hot gas control valve is fully closed, and the opening of the electric expansion valve is adjusted so that the degree of superheating of the refrigerant at the outlet of the evaporator becomes a constant value. a control system; a second control system that adjusts the opening of the hot gas control valve according to the temperature deviation when the temperature deviation is within a predetermined value; and the hot gas whose opening is adjusted by the second control system. A third control system that changes the control target value of the refrigerant superheat degree and adjusts the opening degree of the electric expansion valve to increase or decrease the cooling capacity when the opening degree of the control valve exceeds a predetermined range. Characteristic control device for refrigeration equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16309587U JPH0510183Y2 (en) | 1987-10-27 | 1987-10-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16309587U JPH0510183Y2 (en) | 1987-10-27 | 1987-10-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0170061U true JPH0170061U (en) | 1989-05-10 |
| JPH0510183Y2 JPH0510183Y2 (en) | 1993-03-12 |
Family
ID=31447511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16309587U Expired - Lifetime JPH0510183Y2 (en) | 1987-10-27 | 1987-10-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0510183Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6529601B2 (en) | 2015-11-20 | 2019-06-12 | 三菱電機株式会社 | Refrigeration cycle device and control method of refrigeration cycle device |
-
1987
- 1987-10-27 JP JP16309587U patent/JPH0510183Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0510183Y2 (en) | 1993-03-12 |
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