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.

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.