A capacity control algorithm for a multiple compressor liquid chiller system is provided wherein the speed and number of compressors in operation are controlled in order to obtain a leaving liquid temperature setpoint. In response to an increase in the load in the chiller system, the algorithm determines if a compressor should be started and adjusts the operating speed of all operating compressors when an additional compressor is started. In response to a decrease in the load in the chiller system with multiple compressors operating, the algorithm determines if a compressor should be de-energized and adjusts the operating speed of all remaining operating compressors when a compressor is de-energized.

System and method for capacity control in a multiple compressor chiller system

A rack and pinion storage system for use in a refrigerator compartment defined by a liner includes a pair of supports attached to opposing sidewalls of the liner. First and second gear covers snap-fittingly connect first and second gear wheels to respective first and second mounting brackets extending from a storage basket, such that the gear wheels are rotatably connected to the storage basket and have equal rotational and linear motion along the respective supports. Retaining bars extending from the storage basket are held within channels defined between the bottom walls of the supports and top walls of opposing telescoping slide assemblies used to movably support a door of the compartment. Tabs extending from the supports limit the sliding movement of the storage basket. A removable divider connects to the storage basket, sectioning the basket into multiple storage compartments.

Rack and pinion refrigerator storage system

An encapsulated refrigerator shelf is assembled by interconnecting a platform, such as a glass panel, within a peripheral frame. More specifically, a peripheral shelf frame is formed with a split side portion defining upper and lower frame portions which are spaced by an elongated slot. The encapsulated glass refrigerator shelf is made by slidably inserting the platform onto peripheral frame support structure through the slot formed between the upper and lower frame portions. The frame is also formed with retaining structure to maintain the platform in place once the platform is inserted a requisite amount within the peripheral frame.

Refrigerator shelf with glass receiving slot

A mobile environment-controlled unit comprising a chassis, a compartment supported by the chassis, and an environmental-control system in environmental communication with the compartment. The environmental-control system is configured to control an environmental parameter of the compartment. The environmental-control system includes an AC Alternator and a controller. The AC alternator is powered by an internal combustion engine and supplies electrical power for the environmental-control system. The controller is configured to monitor the environmental parameter of the compartment, monitor one or more electrical parameters of the AC alternator, control the environmental-control system based on the monitored environmental parameter, and control the AC alternator based on the monitored parameters of the alternator.

Improved power regulation system for a mobile environment-controlled unit and method of controlling the same

Systems (100 and 200) and methods (1600-1900) of the invention relate to diagnosing a compressor. A method may include operating a compressor (110) to compress air from a first stage compressor into an intermediate stage reservoir (266), to deliver air from the intermediate stage reservoir to a second stage compressor, and to further compress the air in the second stage compressor into a primary reservoir (180), monitoring an intermediate stage pressure of the intermediate stage reservoir, and identifying a condition of the compressor through recognition of a change in the monitored intermediate stage pressure during a time period in which the compressor is operated. A vehicle system (100) is also provided including an engine, a compressor operatively connected to the engine, and a controller (130) that is operable to identify a condition of the compressor.

System and method for a compressor

A method of controlling compressor for refrigerator and apparatus thereof are disclosed to control an operation of the compressor by optimum efficiency by changing freezing capacity of the compressor. The apparatus controls a rotation direction of the compressor installed in the refrigerator and changes the freezing capacity of the compressor in accordance with the rotation direction of the compressor, thereby effectively controlling the operation of the compressor.

Method of controlling compressor for refrigerator and apparatus thereof

Critical conduction mode (CRM) boost power factor correction (PFC) converter is widely used in ac–dc power supplies to achieve high power factor. The switching frequency varies in a half-line cycle. In this article, both the differential-mode (DM) and common-mode (CM) electromagnetic interference (EMI) noises below 1 MHz from the ac–dc power supply in a LED TV are analyzed and modeled. The power supply consists of two parts: CRM boost PFC converter and LLC resonant converter. The conducted EMI noise and noise source voltages are measured in the time domain and then converted to the frequency domain via short-time fast Fourier transform (STFFT). Through the joint time-frequency analysis using STFFT, the drain-to-source voltage of the power MOSFET in the PFC converter is identified as the dominant noise source of both CM and DM EMI noises below 1 MHz from the power supply. The EMI current path is different during different periods of a cycle of the line voltage. During most time of a cycle, two diodes of the bridge rectifier are forward biased, and the bridge rectifier can be treated as short circuit. The current paths of DM and CM EMI noises are explained and modeled by a linear equivalent circuit model. Three parasitic capacitances need to be considered to model the CM EMI noise in this device under test. From the circuit model, transfer functions relating DM and CM EMI spectra to noise source voltage spectrum are obtained. The conducted EMI spectra are predicted by multiplying the spectrum of noise source voltage by the transfer functions. The prediction matches with measurement. The effects of parasitic capacitances on CM EMI noise are analyzed by simulation and then validated by measurement. The analysis results can help with EMI design to reduce the CM EMI.

Analysis and Modeling of Conducted EMI from an AC–DC Power Supply in LED TV up to 1 MHz

In order to increase the reliability of the parts constituting the basket and to conveniently use the basket and to stably accomplish the operation of the basket, as the shaking of the basket is prevented, there is disclosed a basket operation device of a refrigerator, comprising: a basket freely moved in a back-and-forth direction in the state that the basket is supported by an inner wall of the refrigerator; a rotation shaft supported by the basket and moved with the basket and respectively rotated; a pair of rotation elements supported by both sides of the rotation shaft and rotated at the same angle to guide a movement of the basket when the basket moves in a back-and-forth direction; and a corresponding element formed in the inner wall of the refrigerator in a back-and-forth direction to contact with the rotation elements.

Basket assembly and basket carrier for refrigerator

In order to accomplish the prevention of the shaking of the basket provided in a refrigerator, the fall prevention of the basket, the safe support of foods, the improvement of safety of the supporting portion of the basket, the improvement of user's sanitation and the improvement of appearance, the present invention discloses a mounting apparatus for a basket for a refrigerator comprising: a telescopic mounted on the wall of the refrigerator to be retractable; a connect member engaged with the telescopic; and a basket firmly seated on the upper surface of the connect member and provided with a plurality of bent wires, wherein, in order to support the position of the basket, the connect member comprises a right and left shake preventing part preventing right and left shakings of the basket; a front and rear shake preventing part preventing front and rear shakings of the basket; and a up and down shake preventing part preventing up and down shakings of the basket.

Basket for refrigerator and mounting apparatus for the basket

A damper for refrigerators is disclosed. The damper of this invention effectively vaporizes moisture drops, condensed on a higher temperature surface of a damper's baffle due to a dewing phenomenon caused by a difference in temperature between opposite surfaces of the baffle, thus allowing the baffle to be almost free from freezing. In order to expose the moisture drops on the higher temperature surface of the baffle to cool air flowing through the cool air passage for the fresh compartment when the baffle is opened, the baffle is rotatably held by a rotating shaft installed on the central portion of the baffle or by a hinge pin spaced apart from the baffle by a distance. In the damper of this invention, the moisture drops, condensed on the higher temperature surface of the baffle due to a temperature difference between opposite surfaces of the baffle while the baffle is closed, are fully exposed to the dry cool air when the baffle is opened, and so it is possible for the moisture drops to be quickly evaporated and absorbed by the cool air. The damper of this invention thus effectively prevents its baffle from freezing due to the condensed moisture drops and allows the baffle to be smoothly operated without failure, and improves the operational reliability and market competitiveness of the refrigerators.

Do-Hyung Kim

Papers

Method of controlling compressor for refrigerator and apparatus thereof

Analysis and Modeling of Conducted EMI from an AC–DC Power Supply in LED TV up to 1 MHz

Basket assembly and basket carrier for refrigerator

Basket for refrigerator and mounting apparatus for the basket

Damper for refrigerators