2407 results about "Refrigeration plant" patented technology

This invention is for a highly efficient heat transfer unit and method for heat transfer for an air conditioning refrigeration unit. The invention has a plurality of condenser coils that stand generally vertically upright (with up to 20° tilt to optimize downward water flow with air being pulled across) between a splash louver and an evaporative fill material. The evaporative fill material and the splash louver transfer heat from the water by air cross flow to make the air conditioning unit very efficient and reduces the amount of copper coils needed. The condenser coils are cooled by water flowing down through them and into a sump. The condenser coils are also cooled by air pulled across them by a fan mounted on the top of the air conditioning unit. The sump in the bottom of the unit has a wall that directs the water in it to a water pump that then sends the water to the water distribution pipe. The water pipe covers the water distribution member with water, which then allows the water to flow down the condenser coils. The large amount of heat that is transferred from the condenser coils to the water and the air cross flow is what enables the air conditioning unit to be so efficient. A low pressure drop of refrigerant in the condensing coils, the large surface area, and horizontal air flow also helps the air conditioning unit to be efficient.

A refrigeration appliance includes a fresh food compartment, a freezer compartment, and an ice maker within the fresh food compartment for freezing water into ice pieces. In one example, a rotatable auger drives the ice pieces out of a removable ice bin via a driving force applied in a first direction. A latch is configured to apply a resisting force to the ice bin along a second direction. In another example, an air mover is disposed within the ice maker for delivering cooled air from an ice maker evaporator to a region adjacent to the ice bin. At least one air channel is formed into an inside surface of the ice maker chamber. In another example, a method of making ice in the refrigeration appliance is provided. The method includes the steps of operating the air mover and a defrost heating of the ice maker evaporator.

A refrigeration apparatus includes a compressor and a controller. The compressor has a casing and a compression element. Compressed refrigerant is sent out of the casing after being discharged into an internal space of the casing. An oil sump formed in the casing collects refrigerator oil. A heater heats the refrigerator oil collected. The controller controls the heater while the refrigeration apparatus is stopped so that a temperature of the refrigerator oil collected in the oil sump reaches a first oil temperature target value. The first oil temperature target value is set in order to keep a refrigerant condensation amount of the refrigerant equal to or less than an allowable condensation amount at which the concentration or viscosity of the refrigerator oil needed to lubricate the compressor can be maintained. The refrigerant condensation amount is caused by in-dome condensation at the start of operation of the refrigeration apparatus.

The invention relates to the technical field of refrigeration devices and discloses a method, device and system for controlling refrigeration of a computer room. The system for controlling refrigeration comprises a cooling tower which is located outdoors and comprises a fan arranged on the top of the cooling tower, a first surface air cooler, a first water pump, a second surface air cooler, an air feeder, a temperature sensor and a control device, wherein the first surface air cooler, the first water pump and the second surface air cooler are connected in sequence through a first pipeline, so that closed circulation is formed, the first surface air cooler is located in the cooling tower, the second surface air cooler is located on side of a return air inlet of the computer room and used for cooling return air of the computer room, water in the first surface air cooler is pumped into the second surface air cooler through the first water pump, the air feeder is located on one side of an air supply opening of the computer room and used for conveying cooled return air of the computer room to the computer room, the temperature sensor is located outdoors and used for detecting outdoor temperature information, the control device is connected with the temperature sensor and the first water pump through signals and used for controlling the first water pump to be started when the outdoor temperature is lower than a set first temperature threshold. The system for controlling refrigeration is beneficial to the improvement of the quality of air in the computer room and reduces energy consumption.

A turbogenerator having a gas turbine engine powering generator and a cooling system and an annular heat exchanger powered by a fan disposed across an outer fan duct of the engine. Fan variable inlet and outlet guide vanes may be used to vary power between the fan and the generator which are drivenly connected to a low pressure turbine. Inner and outer portions separated by a rotating shroud of the fan are disposed in annular inner and outer fan ducts respectively. A directed energy weapon may be powered by the generator and cooled by the cooling system. A refrigeration apparatus may be operably disposed between the annular heat exchanger and the directed energy weapon for cooling the directed energy weapon and conditioning power electronics for the weapon. The refrigeration apparatus may include a vapor cycle cooling system and a cold storage containing a phase change material.

The invention discloses a refrigeration equipment control method. The refrigeration plant is provided with an inverter compressor and at least one refrigeration compartment. The inverter compressor is provided with N frequency conversion gears. The corresponding rotate speed of frequency conversion gear of gear I is Si, I = 1, 2, ... N. The control method comprises that S1 is to determine an initial speed R0 of the inverter compressor, S2 is to determine the revision frequency conversion speed difference of the inverter compressor according to the actual temperature of the refrigeration compartment and the setting temperature associated with the refrigeration compartment and S3 is to compare the sum of the initial speed R0 and the revision frequency conversion speed differences with the speeds corresponding to gears of the inverter compressor to obtain the required operating gear to operate the inverter compressor at the operating gear and operate S2 continuously. The refrigeration plant control method sets a plurality of gears of the compression engine of the refrigeration plant; the frequency conversion of the compression engine can be effectively controlled. According to the actual using requirements, the rotate speed of the compressor engine can be reasonably adjusted, thereby the refrigeration efficiency is enhanced, good refrigeration effect is ensured and the power consumption of the refrigeration plant is lowered.

The invention provides a compression-absorption-diffusion composite refrigeration device and a refrigeration circulation method which adopts the device, while the device and the method belong to the technical field of refrigeration devices. The device is coupled in a series connected way by an absorption refrigeration system, a compression refrigeration system and a diffusion refrigeration system and is composed of a common heat exchange device, a throttling device and a refrigeration working medium; and the device comprises a liquid storage device, a solution pump, a generator, a rectifier, a first-stage condenser, a second-stage condenser, a compressor, a throttle valve, an evaporator and an absorber. Ammonia vapor completes first pressure increase in the diffusion refrigeration system and the absorption refrigeration system and enters the compressor through a pipeline after entering the first-stage condenser for completing second pressure increase, after that, the ammonia vapor enters the second-stage condenser to be cooled to liquid ammonia, the liquid ammonia enters the evaporator through the throttle valve, the evaporation and the refrigeration are carried out under the role of a diffusing agent of the evaporator, the liquid ammonia is further mixed with the diffusing agent to enter the absorber, ammonia in the absorber is absorbed, and the diffusing agent is returned back to the evaporator along the pipeline. The device of the invention is applicable to small-scale low-grade waste heat refrigeration occasions.