A device management system having a device having a structural component and a terminal connected to the device via a network includes a feature value detection unit provided in the device and for detecting a feature value of the structural component, a storage device storing in time series the feature value detected by the feature value detection unit, a lifespan estimation unit for estimating a lifespan of the structural component from the feature value stored in the storage device, a determination unit for determining whether a remaining period that is a time period from a time at which estimation is performed to an end of the lifespan is less than or equal to a set scheduled period, and a notification unit provided in the terminal and for sending a notification indicating that the remaining period is less than or equal to the set scheduled period.

An NMR magnet system uses a Stirling cooler having a cold head that extends into a housing of the system to cool a cold shield surrounding a cryogen vessel. The system may have a damper located between the cooler and the cold shield to reduce a transmission of vibration from the cooler to a magnet coil immersed in the cryogen. The damper may be passive, or may be part of an active damping system that uses an acceleration sensor to drive an active damper that compensates for cooler vibration. A compensation apparatus may use a stored characteristic of a signal distortion caused by the vibration and, in response to a trigger signal from the cooler, apply compensation to an excitation signal provided to a sample by an NMR probe in a bore of the magnet coil, or to an FID signal from the sample that is detected by the probe.

A system includes a door sensor that provides a status of whether a door of a refrigeration system is open or closed, a temperature sensor that measures a temperature of a food compartment of the refrigeration system, a power sensor that measures an amount of power consumed by the refrigeration system, and a compressor sensor that provides acoustic data about a compressor of the refrigeration system. The system further includes a remote computing system configured to send an alert indicating that the refrigeration system needs servicing when the temperature of the food compartment of the refrigeration system is determined to be above a predetermined temperature while: the door of the refrigeration system is closed, the amount of power consumed by the refrigeration system is within a predetermined power range, and acoustic signals of the compressor of the refrigeration system are within a predetermined acoustic range.

An accumulator for a compressor and a compressor having an accumulator are disclosed. The accumulator may include a case configured to be disposed at an outside of a shell of a compressor and defining a refrigerant accommodating space, a refrigerant connection pipe having a first end that communicates with an outlet side of an evaporator and a second end that communicates with the refrigerant accommodating space of the case, and a refrigerant suction pipe having a first end that communicates with the refrigerant accommodating space of the case and a second end that communicates with a suction side of the compressor. The refrigerant suction pipe may be fixed to a lower surface and an upper surface of the case defining the refrigerant accommodating space. Therefore, the refrigerant suction pipe may be fixed to the case of the accumulator without a separate pipe holder, thereby attenuating vibration of the accumulator and reducing manufacturing costs.

A rotary compressor (1) includes a hermetically sealed compressor housing (10) that is provided with a refrigerant discharge portion (107) and refrigerant suction portions (104, 105), a compression unit (12) that is arranged in the compressor housing (10) and compresses a refrigerant, sucked from the suction portions (104, 105), and discharges it from the discharge portion (107), a motor (11) that is arranged in the compressor housing (10) and drives the compression unit (12), an accumulator that is connected to the suction portions (104, 105), and a mounting member (50) that secures the accumulator to the compressor housing (10). The compressor housing (10) and an accumulator container (26) of the accumulator are made of a metal material. The mounting member (50) is at least partially made of a resin material and has a first joint portion (J1), which is joined to an outer peripheral surface (10a) of the compressor housing (10).

A compressor and an air conditioner having the compressor, and a protective cover of a connecting terminal of the compressor is installed while spaced apart from a barrier of the connecting terminal. The protective cover is additionally provided with a noise preventing member. Vibration generated from the compressor is delivered to the protective cover via the barrier, but as the protective cover is provided to be spaced apart from the barrier, the vibration is delivered to the barrier through the noise preventing member. Thus, regardless of the state of vibration of the compressor, noise being generated by the protective cover is minimized.

An air-conditioning apparatus includes a low-pressure-side pressure sensor that detects the pressure of heat-source-side refrigerant that flows into a compressor and outputs it as a first detection value and a high-pressure-side pressure sensor that detects the pressure of heat-source-side refrigerant discharged from the compressor and outputs it as a second detection value. When switching the operation mode of the apparatus, a controller determines whether the ratio of the first detection value to the second detection value is higher than a first threshold. When the ratio is higher than the threshold, the controller causes a second refrigerant flow switching device to perform a switching operation. When the ratio is less than or equal to the threshold, the controller makes an adjustment such that an opening degree of an expansion device is less than a second threshold, and then causes the second refrigerant flow switching device to perform the switching operation.

A system for cryocooling an optical sensor on a satellite to a temperature below 200K with minimal vibration comprising a miniature conical rotary screw compressor comprising an inner element configured to only rotate around a first stationary axis and an outer element configured to only rotate around a second stationary axis so that both elements revolve with minimal vibration; with at least one of a) a length of at least one of the inner element and the outer element is between 10 mm and 100 mm; b) a diameter of at least one of the inner element and the outer element is between 2 mm and 45 mm; c) a compression ratio of the rotary screw compressor is between 1:2 and 1:20; and d) a shaft speed of the conical rotary screw compressor is between 1001 and 20000 revolutions per minute.

A heat pump system, and a drier or washer-drier having the same are provided. The heat pump system includes a base, a horizontal compressor and a damper, in which the horizontal compressor is mounted to the base; the damper is supported on the base and supports the horizontal compressor; at least two dampers are arranged along an axial direction of the horizontal compressor. According to the present invention, vibration and noise of the heat pump system may be reduced effectively, and the overall service life thereof may be improved.

Vibration absorption tubing and a manufacturing method thereof. The manufacturing method includes: a solder placement step including: placing solder at solder placement portions in an inner cavity of an adaptor; a pipe fitting step including: fitting a corrugated pipe and the adaptor respectively to adaptor matching portions at corresponding sides of the adaptor, to communicate an adaptor inner cavity with an inner cavity of the corrugated pipe and inner cavities of external connection tubing; and fixing or limiting positions of the corrugated pipe, the adaptor, and the external connection tubing to obtain a tubing assembly; and a component brazing step including: performing furnace brazing on the tubing assembly of the external connection tubing to obtain a main vibration absorption tubing. The vibration absorption tubing has favorable brazing consistency, enhancing connection reliability of components.