JPH0461261U

JPH0461261U -

Info

Publication number: JPH0461261U
Application number: JP10358390U
Authority: JP
Priority date: 1990-10-01
Filing date: 1990-10-01
Publication date: 1992-05-26

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係る車両用冷凍、
冷房装置を示す概略構成図、第２図は一実施例に
係る車両用冷凍、冷房装置が搭載された冷凍車の
側面図、第３図は管路切換手段の組立状態を示す
斜視図、第４図は同手段の側面図、第５図ａは管
路切換手段を展開して示した作動説明図で、バイ
パス用管路が閉じた状態を示す図、第５図ｂは第
５図ａで示された四方パイロツト弁の一部を示す
拡大断面図、第６図は第５図ａと同様の作動説明
図で、バイパス用管路が開いた状態を示す図であ
る。１……車両用冷凍、冷房装置、２ａ，２ｂ……
荷室（室）、３……圧縮機、３ａ，３ｂ……吸入
口、３ｃ……吐出口、５，６……蒸発器、５ｂ，
６ｂ……冷媒出口、７……管路切換手段、９，１
１……電磁弁、３０……管路切換弁、３１……バ
イパス用管路、３２……スライド弁、４０……四
方パイロツト弁、ｅ……第１の冷媒戻し側管路、
ｆ……第２の冷媒戻し側管路。 FIG. 1 shows a vehicle refrigeration system according to an embodiment of the present invention.
2 is a side view of a refrigerating vehicle equipped with a vehicle refrigeration and cooling device according to an embodiment; FIG. 3 is a perspective view showing an assembled state of a pipe switching means; FIG. Fig. 4 is a side view of the same means, Fig. 5a is an explanatory diagram of the operation showing the pipe line switching means expanded, and shows the state in which the bypass pipe is closed, and Fig. 5b is the same as Fig. 5a. FIG. 6 is an enlarged sectional view showing a part of the four-way pilot valve shown in FIG. 6, and is an explanatory view similar to FIG. 1...Vehicle refrigeration, cooling system, 2a, 2b...
Cargo compartment (chamber), 3...Compressor, 3a, 3b...Suction port, 3c...Discharge port, 5, 6...Evaporator, 5b,
6b...refrigerant outlet, 7...pipe switching means, 9,1
DESCRIPTION OF SYMBOLS 1... Solenoid valve, 30... Pipe switching valve, 31... Bypass pipe, 32... Slide valve, 40... Four-way pilot valve, e... First refrigerant return side pipe,
f...Second refrigerant return side conduit.

Claims

[Scope of utility model registration request]

one compressor having a discharge port and two suction ports, two evaporators each disposed in two independent chambers, and a refrigerant inlet pipe of at least one of the two evaporators, and a solenoid valve that closes to shut off the refrigerant inlet pipe when the indoor temperature reaches a set temperature, and the refrigerant outlet of one evaporator is connected to the refrigerant return pipe via the first refrigerant return pipe. In one inlet,
A refrigerant outlet of the other evaporator is connected to the other suction port via a second refrigerant return pipe, and the pipe switching means switches communication and disconnection between the first and second refrigerant return pipes. In the vehicular refrigeration/cooling system that is capable of independently cooling two chambers, the pipe switching means includes a bypass pipe connected between the first and second refrigerant return pipes. a pipeline switching valve having a slide valve that opens and closes the bypass pipeline by displacing between an open position and a closed position, and a passage for high-pressure refrigerant gas acting on the slide valve to open and close the solenoid valve. A solenoid-operated switching valve that switches in conjunction with the solenoid valve; when the solenoid valve is opened, the slide valve is held in the closed position in a first position, and when the solenoid valve is closed, the slide valve is moved in the open position in a second position. A vehicular refrigeration/cooling system comprising a four-way pilot valve.