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:
Feb. 25, 2020
Filed:
Nov. 27, 2017
Hitachi-johnson Controls Air Conditioning, Inc., Tokyo, JP;
Hitachi-Johnson Controls Air Conditioning, Inc., Tokyo, JP;
Abstract
An air conditioner is provided that reduces user discomfort due to vibrations and noises at a compressor, piping, and the like such as of an air conditioner. To achieve this, an air conditioner includes: a compressor () that has a motor () and a compression mechanism () driven by the motor (); a speed detector () that detects a rotation speed of the motor (); a drive mode controller () that controls a drive mode of the motor (); and refrigerant piping that is connected to the compression mechanism () and allows a refrigerant to flow therethrough, wherein the drive mode controller (), for stopping the motor (), decelerates the motor () to a rotation speed equal to or lower than a resonance frequency between the compression mechanism () and the refrigerant piping.