38results about How to "Avoid cooling loss" patented technology

A refrigerator capable of setting a notebook computer inside has a bar-table and the notebook computer is fixed on the bar-table top. When opening the bar-table the notebook computer can be operated on it, and when closing the bar-table the notebook computer is inserted together into the refrigerator door. The back part of the bar-table cover plate is a thermal-insulation foamed layer. After opening the bar-table cover plate, the foamed layer can still seal the refrigerating chamber, so the cold-air can't be leaked out.

The present invention discloses an efficient temperature control device for solar telescope primary lens surface seeing effect control. The device comprises a primary lens, a lens surface sensor, a refrigeration set, a refrigeration machine external circulation cooling system, a surface cooler, a pumping pump, a fan, an electric heater, a sealed box, a controller and an environment temperature measurement device. The goal of the temperature control device is to carry out temperature control of the primary lens, thus the measurement value of the lens surface sensor is consistent with the measurement value of the environment temperature measurement device, and thus the purpose of controlling a lens surface seeing effect is achieved. Specifically the temperature control of the primary lens surface is realized by controlling the power of the electric heater and the cooling medium refrigeration temperature of the refrigeration set by the controller. Through the surface cooler, the contact area of a cooling medium is increased, the heat exchange efficiency is raised through blowing of the fan, the cold and heat loss is reduced through the sealed box, and the control response efficiency of the primary lens surface temperature is greatly improved.

An MRI system is provided with a refrigeration system that includes dual compressors that are coupled to a single coldhead that cools the liquid helium in the MRI system. Because the single coldhead receives the compressed refrigerant regardless of the compressor that is being used, the unacceptable cooling loss that would have occurred with redundant coldheads is avoided. By coupling two compressors to a single coldhead, continuous operation can be provided despite a failure of either compressor. The dual refrigeration system may comprise a water-cooled compressor and an air-cooled compressorto enhance MRI system reliability in the event of a failure of the primary compressor or the cooling water circulation system. Alternatively, two water-cooled compressors may be provided, each with its own independent water system. Check valves may be used to enable passive control of the refrigerant gas flow from either compressor to the coldhead, thereby further improving the reliability.

The invention discloses a composite falling film evaporator and a refrigeration device, which mainly include a casing module, a liquid distributor, a refrigerant inlet, a refrigerant outlet, a frozen water inlet, a frozen water outlet, a lubricating oil collection bag and a housing, and the refrigerant is first In the inner tube of the bushing, it exchanges heat with the chilled water in the outer tube to perform dry evaporation. When the dryness of the refrigerant rises to a certain value, the remaining gas-liquid two-phase refrigerant is discharged from the inner tube of the bushing, and then sent to into the falling film liquid distributor for gas-liquid separation, and the separated liquid refrigerant is evenly distributed, and then undergoes secondary falling film evaporation on the outer surface of the casing. The invention can reduce the heat exchange area of ​​the conventional dry evaporator by about 15-25%, reduce the volume by about 30%, and can greatly reduce the overall manufacturing cost of the evaporator.

The invention provides a defrosting control method and device of an air-cooled refrigerator. The defrosting control method of the air-cooled refrigerator comprises the following steps: detecting an air pressure difference of air supply flow of the air-cooled refrigerator before and after the air supply flow passes through an evaporator of the air-cooled refrigerator; judging whether the air pressure difference of the air supply flow is greater than a preset first air pressure difference threshold value; if the air pressure difference of the air supply flow is greater than the preset first air pressure difference threshold value, triggering the air-cooled refrigerator to start a defrosting procedure; and if the air pressure difference of the air supply flow is not greater than the preset first air pressure difference threshold value, judging whether the operation rate of a compressor of the air-cooled refrigerator is greater than a preset operation rate threshold value, and if the operation rate of the compressor is greater than the preset operation rate threshold value, judging whether the frosting thickness of the evaporator reaches a level where defrosting is needed. Therefore, defrosting can be carried out according to the actual frosting condition of the evaporator, and the refrigerator cold loss caused by frequent defrosting and the reduction of the heat exchange efficiency due to untimely defrosting are avoided.

A humidity adjusting device for a semiconductor refrigeration box comprises a TEC (Thermoelectric Cooler) (1) mounted on the refrigeration box (10). One side of the TEC (1) is connected with a cool-end heat exchanger (2) arranged in a box body of the refrigeration box (10), and the other side of the TEC (1) is connected with a hot-end heat exchanger (3) arranged outside the box body. An inner circulation fan (4) is arranged on the cool-end heat exchanger (2); an in-box temperature sensor, an in-box humidity sensor, and a controller capable of conditioning working voltages of the TEC (1) and the inner circulation fan (4) are further arranged in the box body; and the in-box temperature sensor and the in-box humidity sensor are both connected with the controller. The device can realize a constant-temperature dehumidifying function by using former refrigeration equipment of the refrigeration box (10), and additionally arranging the controller for conditioning the working voltage of the inner circulation fan (4). Further provided is a humidity adjusting method for the semiconductor refrigeration box, which stores cooling capacity in the cool-end heat exchanger (2) by rapidly refrigerating and turning off the inner circulation fan at a cool end simultaneously, and realizes the constant-temperature dehumidifying function by rapidly increasing the working voltage of the inner circulation fan (4) and carrying out rapid humidity adjustment. The control method has no cooling capacity loss, can individually adjust the humidity, and can monitor a relative humidity value in the refrigeration box in real time. The device is simple in structure and low in manufacturing cost.

A refrigerator capable of setting a notebook computer inside has a bar-table and the notebook computer is fixed on the bar-table top. When opening the bar-table the notebook computer can be operated on it, and when closing the bar-table the notebook computer is inserted together into the refrigerator door. The back part of the bar-table cover plate is a thermal-insulation foamed layer. After opening the bar-table cover plate, the foamed layer can still seal the refrigerating chamber, so the cold-air can't be leaked out.