JPS626666U

JPS626666U -

Info

Publication number: JPS626666U
Application number: JP9875385U
Authority: JP
Priority date: 1985-06-27
Filing date: 1985-06-27
Publication date: 1987-01-16

Description

[Brief explanation of the drawing]

第１図〜第３図は本考案の実施例の説明図で、
第１図は冷媒回路図、第２図は電気回路図、第３
図は運転状態を示すフローチヤート図、第４図は
本考案の他の実施例の冷媒回路図、第５図は従来
例の模式説明図である。１……圧縮機、４……蒸発器、６……均圧管、
６ａ……第１分岐均圧管、６ｂ……第２分岐均圧
管、７……感温膨張弁、９……吸入ガス管、１１
……ホツトガスバイパス管、１２……ホツトガス
弁、１７……切換弁、１８……過負荷運転検出手
段、１９……制御手段、Ｂ……ホツトガスバイパ
ス回路。 Figures 1 to 3 are explanatory diagrams of embodiments of the present invention.
Figure 1 is a refrigerant circuit diagram, Figure 2 is an electrical circuit diagram, and Figure 3 is a refrigerant circuit diagram.
4 is a flowchart showing the operating state, FIG. 4 is a refrigerant circuit diagram of another embodiment of the present invention, and FIG. 5 is a schematic explanatory diagram of a conventional example. 1...Compressor, 4...Evaporator, 6...Pressure equalization pipe,
6a...First branch pressure equalization pipe, 6b...Second branch pressure equalization pipe, 7...Temperature-sensitive expansion valve, 9...Suction gas pipe, 11
... Hot gas bypass pipe, 12 ... Hot gas valve, 17 ... Switching valve, 18 ... Overload operation detection means, 19 ... Control means, B ... Hot gas bypass circuit.

Claims

[Scope of utility model registration request]

A refrigeration system in which a hot gas bypass circuit B for bypassing hot gas from the outlet side of the compressor 1 to the inlet side of the evaporator 4 is provided to perform a refrigeration operation and a capacity control operation for bypassing the hot gas via the bypass circuit B. In the apparatus, a temperature-sensitive expansion valve 7 having a pressure equalizing pipe 6 branched into a first branch pressure equalizing pipe 6a and a second branch pressure equalizing pipe 6b is provided,
The second branch pressure equalization pipes 6a and 6b are respectively connected to the suction gas pipe 9 and the hot gas bypass circuit B, and the connection side of the first or second branch pressure equalization pipe (6a or 6b) is connected to the pressure equalization pipe 6. A switching mechanism for selectively applying pressure to the expansion valve 7 is provided, and an overload detection means 18 is provided for detecting overload during refrigeration operation, and the output of the detection means 18 is input to control the switching mechanism for controlling the expansion valve 7. A refrigeration system characterized in that a control means 19 is provided for controlling switching so that the pressure on the connection side of the second branch pressure equalizing pipe 6b acts on the valve 7.