JPH02114874U - - Google Patents
Info
- Publication number
- JPH02114874U JPH02114874U JP2118789U JP2118789U JPH02114874U JP H02114874 U JPH02114874 U JP H02114874U JP 2118789 U JP2118789 U JP 2118789U JP 2118789 U JP2118789 U JP 2118789U JP H02114874 U JPH02114874 U JP H02114874U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- refrigerant
- supply amount
- control means
- amount control
- 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
- 239000003507 refrigerant Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Description
第１図はこの考案による冷凍装置の一実施例を
示す構成図、第２図は従来の装置を示す構成図、
第３図は本装置における低圧側の冷媒圧力の領域
示す図、第４図は第一、第２図の冷凍装置の容量
制御運転の説明図である。
図において、１ａは凝縮器、１ｂ，１ｃは圧縮
機、２ａ〜２ｃは蒸発器、９は冷媒回路、２ｇ〜
２ｉは冷媒供給量制御手段、３は圧力検出部、４
は圧力設定部、６はデユーテイ設定部、６ａ，６
ｂは倍率設定制御部、７は低圧圧力判定部、５は
制御部である。なお、各図中、同一符号は同一、
または相当部分を示す。
FIG. 1 is a block diagram showing an embodiment of the refrigeration device according to this invention, and FIG. 2 is a block diagram showing a conventional device.
FIG. 3 is a diagram showing the region of refrigerant pressure on the low pressure side in this apparatus, and FIG. 4 is an explanatory diagram of the capacity control operation of the refrigeration apparatus of FIGS. 1 and 2. In the figure, 1a is a condenser, 1b and 1c are compressors, 2a to 2c are evaporators, 9 is a refrigerant circuit, and 2g to 2c are evaporators.
2i is a refrigerant supply amount control means, 3 is a pressure detection section, 4
is the pressure setting part, 6 is the duty setting part, 6a, 6
b is a magnification setting control section, 7 is a low pressure determination section, and 5 is a control section. In addition, in each figure, the same reference numerals are the same,
or a significant portion.
Claims (1)
器及び上記各蒸発器に対応して設けられ、各蒸発
器への冷媒供給量を制御する冷媒供給量制御手段
より構成された冷媒回路、上記圧縮機の吸入圧力
を検出する圧力検出部、収束させようとする上記
低圧側の冷媒圧力の収束圧力値を設定する圧力設
定部、上記圧力検出部の検出圧力と上記圧力設定
部の設定圧力値とを比較し、圧縮機の容量を制御
する制御部、一定時間上記冷媒供給量制御手段を
閉にするデユーテイサイクルを実行させるデユー
テイ設定部、及び上記閉止時間に対し、所定の倍
率に設定された時間に応じ、各冷媒供給量制御手
段を閉する倍率設定制御部を有するものにおいて
、上記低圧側の冷媒圧力が、上記収束圧力値より
一定時間高い場合、冷媒供給量制御手段のうち、
最も倍率の高い冷媒供給量制御手段を上記倍率設
定制御部で設定される時間以上周期的に閉にし、
閉後上記低圧側の冷媒圧力が一定時間収束圧力値
以下に保持されたとき、最も倍率の高い上記冷媒
供給量制御手段を開にする低圧圧力判定部を設け
たことを特徴とする冷凍装置。 A refrigerant circuit comprising a capacity controllable compressor, a condenser, a plurality of evaporators, and a refrigerant supply amount control means provided corresponding to each of the evaporators to control the amount of refrigerant supplied to each evaporator; A pressure detection section that detects the suction pressure of the compressor, a pressure setting section that sets the convergence pressure value of the refrigerant pressure on the low pressure side to be converged, a detected pressure of the pressure detection section and a set pressure of the pressure setting section. a control unit that controls the capacity of the compressor based on the comparison with the value, a duty setting unit that executes a duty cycle that closes the refrigerant supply amount control means for a certain period of time, and In a device having a magnification setting control unit that closes each refrigerant supply amount control means according to a set time, if the refrigerant pressure on the low pressure side is higher than the convergence pressure value for a certain period of time, one of the refrigerant supply amount control means ,
Periodically closing the refrigerant supply amount control means with the highest magnification for a period of time set by the magnification setting control section,
A refrigeration system comprising a low-pressure determination unit that opens the refrigerant supply amount control means with the highest magnification when the refrigerant pressure on the low-pressure side is maintained below a convergence pressure value for a certain period of time after closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2118789U JPH02114874U (en) | 1989-02-23 | 1989-02-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2118789U JPH02114874U (en) | 1989-02-23 | 1989-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02114874U true JPH02114874U (en) | 1990-09-13 |
Family
ID=31238198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2118789U Pending JPH02114874U (en) | 1989-02-23 | 1989-02-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02114874U (en) |
-
1989
- 1989-02-23 JP JP2118789U patent/JPH02114874U/ja active Pending