The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2017
Filed:
Feb. 10, 2015
Shinwa Controls Co., Ltd, Kawasaki-shi, Kanagawa, JP;
SHINWA CONTROLS CO., LTD, Kawasaki-shi, JP;
Abstract
Chiller apparatus performs temperature-control operation without placing excessive load on an electric compressor even when temperature difference between set and work temperatures are small; little temperature difference between refrigerant intake side and refrigerant discharge side of an evaporator in freezing-cycle, at time of temperature-control setting with small temperature difference between set and work temperatures; PCB2 performs PID operation on refrigerant detection temperature by sensor near the side of refrigerant inflow of a heating apparatus in a refrigerant-cycle; a PCB1 performs serial communication of a drive control signal for an inverter generated based on a result, and controls the compressor rotational speed according to work temperature within range. PCB2 performs PID operation on the work temperature detected by a first sensor, and PCB1 controls opening and closing of an electronic expansion valve by driving a stepping-motor according to a pulse signal generated based on result, and controls flow rate of refrigerant.