JPS6086884U

JPS6086884U - Defrost control device

Info

Publication number: JPS6086884U
Application number: JP17917983U
Authority: JP
Inventors: 久保田　昭二
Original assignee: 三洋電機株式会社
Priority date: 1983-11-18
Filing date: 1983-11-18
Publication date: 1985-06-14

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は冷媒回路図、第２図は従来の概略操作回路図、
第３図は本考案の一実施例として示した概略操作回路図
である。１・・・圧縮機、２・・・凝縮器、５・・・蒸発器、７
・・・アキュムレータ、１１・・・露受皿、２９・・・
除霜感知サーモスタット、３４・・・ホットガス延長タ
イマ、３５・・・補助リレー。Figure 1 is a refrigerant circuit diagram, Figure 2 is a conventional schematic operation circuit diagram,
FIG. 3 is a schematic operating circuit diagram showing one embodiment of the present invention. 1... Compressor, 2... Condenser, 5... Evaporator, 7
...Accumulator, 11...Dew pan, 29...
Defrost sensing thermostat, 34...Hot gas extension timer, 35...Auxiliary relay.

Claims

[Scope of utility model registration request]

The operation of the compressor of a refrigeration system in which a compressor, a condenser, an evaporator, an accumulator, etc. are connected with pipes in a ring is continued after the cooling operation is completed, and the compressor is transferred to the evaporator and a dew receiving tray that receives dew from the evaporator. In a defrosting control device, the defrosting control device is equipped with a defrosting sensing thermostat that performs defrosting operation by sending high-temperature, high-pressure hot gas from the evaporator, detects the temperature of the evaporator, and operates when the temperature of the evaporator reaches the defrosting return temperature. , which is connected in series to the defrost sensing thermostat, and is energized by the operation of the defrost sensing thermostat to continuously operate the compressor for a predetermined period of time necessary for draining the defrosting water, and the hot gas is supplied to at least the dew pan. and a hot gas extension timer for stopping the compressor after the predetermined time has elapsed, and a normally closed contact connected in series with the defrosting sensing thermostat and the hot gas extension timer. A normally closed contact and a switching contact are connected in parallel to the hot gas extension timer, and when energized by the operation of the defrosting sensing thermostat, the switching contact switches to the normally open contact, and the defrosting sensing thermostat switches to the normally open contact. A defrosting control device comprising an auxiliary relay forming a holding circuit that short-circuits the hot gas extension timer and continues energizing the hot gas extension timer. −