JPS58169478U - Refrigerator operation control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figure 1 is a system diagram of the open showcase refrigeration membrane system that controls compressor capacity using an electronic pressure switch. Figure 2 is a control operation pattern diagram showing the output characteristics of the electronic pressure switch in Figure 1. The figure shows the operating chart of the refrigerator according to Fig. 2, Fig. 4 A1 shows the operating characteristic diagram showing the changes in temperature and suction pressure of items stored in the refrigerator based on the operation control method shown in Fig. 3, and Fig. 5 1 is an explanatory diagram of on-delay and off-delay operations, and FIGS. 6 and 7 are diagrams showing on-delay and off-delay one-time control characteristics of different embodiments of the present invention, respectively. 1...Multi-type compressor unit, 2■~2
m...Compressor, 4...Capacitor, 5...
Open showcase as a cooling unit, 6...
Evaporator, 8...Electronic pressure switch, 9...Pressure sensor for suction pressure detection, P□...Cut-in set value, P6...Cut-out set value, ToN...1 hour on-delay, ToT, F...One hour off delay. Correction 1984. 9.24 The scope of claims for utility model registration is amended as follows, and the ``Scope of Claims'' on the second line of page 2 of the specification is amended to read ``Scope of Claims for Utility Model Registration.'' - Amend "Claims" on page 2, line 7 of the specification to read "Claims for utility model registration." - The brief description of the drawing shall be amended as follows. "Invention" on page 12, lines 11-12 of the specification is amended to "devise".

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A refrigeration machine with a refrigeration circuit composed of a condensing unit and a cooling unit is equipped with a pressure switch, and a cut is preset by the pressure switch using the detected value of the compressor suction pressure as input. In an operation control device for a refrigerator, the operation control device compares input and cutout settings and gives an operation control command to a compressor through the pressure switch.
If the pressure setting is kept at the listed price and the ambient conditions are lower temperature and humidity than the standard ambient conditions, then the suction pressure will reach the cut-in setting value until the operation command is output to the Jinpresa. In addition, in operating areas where the ambient conditions are hot and humid, there is an off-delay that provides a time delay between when the suction pressure reaches the cutout setting value and when a stop command is output to the compressor. 1. An operation control device for a refrigerating machine, characterized in that an operation control command is given to a compressor from the pressure switch by setting respective times. (2. In the operation control device according to claim 1, the on-delay time and the off-delay time are set to values proportional to the deviation between the standard ambient conditions and the ambient conditions at that time. (3) In the operation control device according to claim 1 or 2, the operation control device for a refrigerator is configured such that a slight on-delay of one hour and off-delay of one hour are set even under standard ambient conditions. Operation control device.