JPS6419510U

JPS6419510U -

Info

Publication number: JPS6419510U
Application number: JP11488887U
Authority: JP
Priority date: 1987-07-27
Filing date: 1987-07-27
Publication date: 1989-01-31

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１〜３図はこの考案の実施例を示し、第１図
は概念図、第２図は回路図、第３図は第１流路と
第２流路の切換特性及びコンプレツサの容量変化
特性を示す説明図、第４図は従来技術の第１図相
当概念図である。１……冷凍サイクル、２……コンプレツサ、３
……コンデンサ、５……第１流路、６……第２流
路、７……冷房用膨張弁、８……冷房用エバポレ
ータ、９……冷蔵用膨張弁、１０……冷蔵用エバ
ポレータ、１３……制御回路（制御手段）、１４
……３方切換弁（切換弁）。 Figures 1 to 3 show examples of this invention, Figure 1 is a conceptual diagram, Figure 2 is a circuit diagram, and Figure 3 is the switching characteristics of the first flow path and the second flow path and the capacity change characteristics of the compressor. FIG. 4 is a conceptual diagram corresponding to FIG. 1 of the prior art. 1... Refrigeration cycle, 2... Compressor, 3
... Capacitor, 5 ... First flow path, 6 ... Second flow path, 7 ... Expansion valve for cooling, 8 ... Evaporator for cooling, 9 ... Expansion valve for refrigeration, 10 ... Evaporator for refrigerator, 13...control circuit (control means), 14
...3-way switching valve (switching valve).

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

車両に配設される冷凍サイクルのコンプレツサ
に可変容量型のコンプレツサを用い、このコンプ
レツサの下流側にコンデンサを配設し、コンデン
サの下流側に冷房用膨張弁及び冷房用エバポレー
タを有する第１流路と、冷蔵用膨張弁及び冷蔵用
エバポレータを有する第２流路とを並設し、上記
第１流路と第２流路との分岐部に切換弁を設け、
上記切換弁を第１流路側と第２流路側に切換える
と共に切換弁が第１流路側に切換つた場合には、
冷房用エバポレータの凍結限界以上にコンプレツ
サの吐出量を減少させ、切換弁が第２流路側に切
換つた場合には冷蔵用エバポレータの凍結限界以
下にコンプレツサの吐出量を増加させる制御手段
を設けたことを特徴とする車両用冷房冷蔵装置。 A first flow path in which a variable capacity compressor is used as a compressor of a refrigeration cycle installed in a vehicle, a condenser is disposed downstream of the compressor, and a cooling expansion valve and a cooling evaporator are provided downstream of the condenser. and a second flow path having a refrigeration expansion valve and a refrigeration evaporator are arranged in parallel, and a switching valve is provided at a branch part of the first flow path and the second flow path,
When the switching valve is switched to the first flow path side and the second flow path side, and the switching valve is also switched to the first flow path side,
A control means is provided to reduce the discharge amount of the compressor beyond the freezing limit of the cooling evaporator, and to increase the discharge amount of the compressor to below the freezing limit of the refrigeration evaporator when the switching valve is switched to the second flow path side. A vehicle cooling and refrigeration system featuring: